Merge remote-tracking branch 'upstream/prep-release-3.2.9'

author: Maat <maat-pub@mageia.biz> 2020-05-08 21:52:11 +0200
committer: Maat <maat-pub@mageia.biz> 2020-05-08 21:52:11 +0200
commit: 8ea437e30605e0f66b5220bf904a61d7c1d11ddd (patch)
tree: e0db2bb4a012d5b06a633160b19f62f4868ecd28 /phpBB/phpbb
parent: 36bc1870f21fac04736a1049c1d5b8e127d729f4 (diff)
parent: 2fdd46b36431ae0f58bb2e78e42553168db9a0ff (diff)
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511 files changed, 45379 insertions, 7693 deletions
diff --git a/phpBB/phpbb/attachment/delete.php b/phpBB/phpbb/attachment/delete.php
new file mode 100644
index 0000000000..3c98e21587
--- /dev/null
+++ b/phpBB/phpbb/attachment/delete.php
@@ -0,0 +1,480 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\attachment;
+
+use \phpbb\config\config;
+use \phpbb\db\driver\driver_interface;
+use \phpbb\event\dispatcher;
+use \phpbb\filesystem\filesystem;
+
+/**
+ * Attachment delete class
+ */
+class delete
+{
+	/** @var config */
+	protected $config;
+
+	/** @var driver_interface */
+	protected $db;
+
+	/** @var dispatcher */
+	protected $dispatcher;
+
+	/** @var filesystem  */
+	protected $filesystem;
+
+	/** @var resync */
+	protected $resync;
+
+	/** @var string phpBB root path */
+	protected $phpbb_root_path;
+
+	/** @var array Attachement IDs */
+	protected $ids;
+
+	/** @var string SQL ID string */
+	private $sql_id;
+
+	/** @var string SQL where string */
+	private $sql_where = '';
+
+	/** @var int Number of deleted items */
+	private $num_deleted;
+
+	/** @var array Post IDs */
+	private $post_ids = array();
+
+	/** @var array Message IDs */
+	private $message_ids = array();
+
+	/** @var array Topic IDs */
+	private $topic_ids = array();
+
+	/** @var array Info of physical file */
+	private $physical = array();
+
+	/**
+	 * Attachment delete class constructor
+	 *
+	 * @param config $config
+	 * @param driver_interface $db
+	 * @param dispatcher $dispatcher
+	 * @param filesystem $filesystem
+	 * @param resync $resync
+	 * @param string $phpbb_root_path
+	 */
+	public function __construct(config $config, driver_interface $db, dispatcher $dispatcher, filesystem $filesystem, resync $resync, $phpbb_root_path)
+	{
+		$this->config = $config;
+		$this->db = $db;
+		$this->dispatcher = $dispatcher;
+		$this->filesystem = $filesystem;
+		$this->resync = $resync;
+		$this->phpbb_root_path = $phpbb_root_path;
+	}
+
+	/**
+	 * Delete Attachments
+	 *
+	 * @param string $mode can be: post|message|topic|attach|user
+	 * @param mixed $ids can be: post_ids, message_ids, topic_ids, attach_ids, user_ids
+	 * @param bool $resync set this to false if you are deleting posts or topics
+	 *
+	 * @return int|bool Number of deleted attachments or false if something
+	 *			went wrong during attachment deletion
+	 */
+	public function delete($mode, $ids, $resync = true)
+	{
+		if (!$this->set_attachment_ids($ids))
+		{
+			return false;
+		}
+
+		$this->set_sql_constraints($mode);
+
+		$sql_id = $this->sql_id;
+
+		/**
+		 * Perform additional actions before collecting data for attachment(s) deletion
+		 *
+		 * @event core.delete_attachments_collect_data_before
+		 * @var	string	mode			Variable containing attachments deletion mode, can be: post|message|topic|attach|user
+		 * @var	mixed	ids				Array or comma separated list of ids corresponding to the mode
+		 * @var	bool	resync			Flag indicating if posts/messages/topics should be synchronized
+		 * @var	string	sql_id			The field name to collect/delete data for depending on the mode
+		 * @since 3.1.7-RC1
+		 */
+		$vars = array(
+			'mode',
+			'ids',
+			'resync',
+			'sql_id',
+		);
+		extract($this->dispatcher->trigger_event('core.delete_attachments_collect_data_before', compact($vars)));
+
+		$this->sql_id = $sql_id;
+		unset($sql_id);
+
+		// Collect post and topic ids for later use if we need to touch remaining entries (if resync is enabled)
+		$this->collect_attachment_info($resync);
+
+		// Delete attachments from database
+		$this->delete_attachments_from_db($mode, $ids, $resync);
+
+		$sql_id = $this->sql_id;
+		$post_ids = $this->post_ids;
+		$topic_ids = $this->topic_ids;
+		$message_ids = $this->message_ids;
+		$physical = $this->physical;
+		$num_deleted = $this->num_deleted;
+
+		/**
+		 * Perform additional actions after attachment(s) deletion from the database
+		 *
+		 * @event core.delete_attachments_from_database_after
+		 * @var	string	mode			Variable containing attachments deletion mode, can be: post|message|topic|attach|user
+		 * @var	mixed	ids				Array or comma separated list of ids corresponding to the mode
+		 * @var	bool	resync			Flag indicating if posts/messages/topics should be synchronized
+		 * @var	string	sql_id			The field name to collect/delete data for depending on the mode
+		 * @var	array	post_ids		Array with post ids for deleted attachment(s)
+		 * @var	array	topic_ids		Array with topic ids for deleted attachment(s)
+		 * @var	array	message_ids		Array with private message ids for deleted attachment(s)
+		 * @var	array	physical		Array with deleted attachment(s) physical file(s) data
+		 * @var	int		num_deleted		The number of deleted attachment(s) from the database
+		 * @since 3.1.7-RC1
+		 */
+		$vars = array(
+			'mode',
+			'ids',
+			'resync',
+			'sql_id',
+			'post_ids',
+			'topic_ids',
+			'message_ids',
+			'physical',
+			'num_deleted',
+		);
+		extract($this->dispatcher->trigger_event('core.delete_attachments_from_database_after', compact($vars)));
+
+		$this->sql_id = $sql_id;
+		$this->post_ids = $post_ids;
+		$this->topic_ids = $topic_ids;
+		$this->message_ids = $message_ids;
+		$this->physical = $physical;
+		$this->num_deleted = $num_deleted;
+		unset($sql_id, $post_ids, $topic_ids, $message_ids, $physical, $num_deleted);
+
+		if (!$this->num_deleted)
+		{
+			return 0;
+		}
+
+		// Delete attachments from filesystem
+		$this->remove_from_filesystem($mode, $ids, $resync);
+
+		// If we do not resync, we do not need to adjust any message, post, topic or user entries
+		if (!$resync)
+		{
+			return $this->num_deleted;
+		}
+
+		// No more use for the original ids
+		unset($ids);
+
+		// Update post indicators for posts now no longer having attachments
+		$this->resync->resync('post', $this->post_ids);
+
+		// Update message table if messages are affected
+		$this->resync->resync('message', $this->message_ids);
+
+		// Now update the topics. This is a bit trickier, because there could be posts still having attachments within the topic
+		$this->resync->resync('topic', $this->topic_ids);
+
+		return $this->num_deleted;
+	}
+
+	/**
+	 * Set attachment IDs
+	 *
+	 * @param mixed $ids ID or array of IDs
+	 *
+	 * @return bool True if attachment IDs were set, false if not
+	 */
+	protected function set_attachment_ids($ids)
+	{
+		// 0 is as bad as an empty array
+		if (empty($ids))
+		{
+			return false;
+		}
+
+		if (is_array($ids))
+		{
+			$ids = array_unique($ids);
+			$this->ids = array_map('intval', $ids);
+		}
+		else
+		{
+			$this->ids = array((int) $ids);
+		}
+
+		return true;
+	}
+
+	/**
+	 * Set SQL constraints based on mode
+	 *
+	 * @param string $mode Delete mode; can be: post|message|topic|attach|user
+	 */
+	private function set_sql_constraints($mode)
+	{
+		switch ($mode)
+		{
+			case 'post':
+			case 'message':
+				$this->sql_id = 'post_msg_id';
+				$this->sql_where = ' AND in_message = ' . ($mode == 'message' ? 1 : 0);
+			break;
+
+			case 'topic':
+				$this->sql_id = 'topic_id';
+			break;
+
+			case 'user':
+				$this->sql_id = 'poster_id';
+			break;
+
+			case 'attach':
+			default:
+				$this->sql_id = 'attach_id';
+			break;
+		}
+	}
+
+	/**
+	 * Collect info about attachment IDs
+	 *
+	 * @param bool $resync Whether topics/posts should be resynced after delete
+	 */
+	protected function collect_attachment_info($resync)
+	{
+		// Collect post and topic ids for later use if we need to touch remaining entries (if resync is enabled)
+		$sql = 'SELECT post_msg_id, topic_id, in_message, physical_filename, thumbnail, filesize, is_orphan
+			FROM ' . ATTACHMENTS_TABLE . '
+			WHERE ' . $this->db->sql_in_set($this->sql_id, $this->ids);
+
+		$sql .= $this->sql_where;
+
+		$result = $this->db->sql_query($sql);
+
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			// We only need to store post/message/topic ids if resync is enabled and the file is not orphaned
+			if ($resync && !$row['is_orphan'])
+			{
+				if (!$row['in_message'])
+				{
+					$this->post_ids[] = $row['post_msg_id'];
+					$this->topic_ids[] = $row['topic_id'];
+				}
+				else
+				{
+					$this->message_ids[] = $row['post_msg_id'];
+				}
+			}
+
+			$this->physical[] = array('filename' => $row['physical_filename'], 'thumbnail' => $row['thumbnail'], 'filesize' => $row['filesize'], 'is_orphan' => $row['is_orphan']);
+		}
+		$this->db->sql_freeresult($result);
+
+		// IDs should be unique
+		$this->post_ids = array_unique($this->post_ids);
+		$this->message_ids = array_unique($this->message_ids);
+		$this->topic_ids = array_unique($this->topic_ids);
+	}
+
+	/**
+	 * Delete attachments from database table
+	 */
+	protected function delete_attachments_from_db($mode, $ids, $resync)
+	{
+		$sql_id = $this->sql_id;
+		$post_ids = $this->post_ids;
+		$topic_ids = $this->topic_ids;
+		$message_ids = $this->message_ids;
+		$physical = $this->physical;
+
+		/**
+		 * Perform additional actions before attachment(s) deletion
+		 *
+		 * @event core.delete_attachments_before
+		 * @var	string	mode			Variable containing attachments deletion mode, can be: post|message|topic|attach|user
+		 * @var	mixed	ids				Array or comma separated list of ids corresponding to the mode
+		 * @var	bool	resync			Flag indicating if posts/messages/topics should be synchronized
+		 * @var	string	sql_id			The field name to collect/delete data for depending on the mode
+		 * @var	array	post_ids		Array with post ids for deleted attachment(s)
+		 * @var	array	topic_ids		Array with topic ids for deleted attachment(s)
+		 * @var	array	message_ids		Array with private message ids for deleted attachment(s)
+		 * @var	array	physical		Array with deleted attachment(s) physical file(s) data
+		 * @since 3.1.7-RC1
+		 */
+		$vars = array(
+			'mode',
+			'ids',
+			'resync',
+			'sql_id',
+			'post_ids',
+			'topic_ids',
+			'message_ids',
+			'physical',
+		);
+		extract($this->dispatcher->trigger_event('core.delete_attachments_before', compact($vars)));
+
+		$this->sql_id = $sql_id;
+		$this->post_ids = $post_ids;
+		$this->topic_ids = $topic_ids;
+		$this->message_ids = $message_ids;
+		$this->physical = $physical;
+		unset($sql_id, $post_ids, $topic_ids, $message_ids, $physical);
+
+		// Delete attachments
+		$sql = 'DELETE FROM ' . ATTACHMENTS_TABLE . '
+			WHERE ' . $this->db->sql_in_set($this->sql_id, $this->ids);
+
+		$sql .= $this->sql_where;
+
+		$this->db->sql_query($sql);
+		$this->num_deleted = $this->db->sql_affectedrows();
+	}
+
+	/**
+	 * Delete attachments from filesystem
+	 */
+	protected function remove_from_filesystem($mode, $ids, $resync)
+	{
+		$space_removed = $files_removed = 0;
+
+		foreach ($this->physical as $file_ary)
+		{
+			if ($this->unlink_attachment($file_ary['filename'], 'file', true) && !$file_ary['is_orphan'])
+			{
+				// Only non-orphaned files count to the file size
+				$space_removed += $file_ary['filesize'];
+				$files_removed++;
+			}
+
+			if ($file_ary['thumbnail'])
+			{
+				$this->unlink_attachment($file_ary['filename'], 'thumbnail', true);
+			}
+		}
+
+		$sql_id = $this->sql_id;
+		$post_ids = $this->post_ids;
+		$topic_ids = $this->topic_ids;
+		$message_ids = $this->message_ids;
+		$physical = $this->physical;
+		$num_deleted = $this->num_deleted;
+
+		/**
+		 * Perform additional actions after attachment(s) deletion from the filesystem
+		 *
+		 * @event core.delete_attachments_from_filesystem_after
+		 * @var	string	mode			Variable containing attachments deletion mode, can be: post|message|topic|attach|user
+		 * @var	mixed	ids				Array or comma separated list of ids corresponding to the mode
+		 * @var	bool	resync			Flag indicating if posts/messages/topics should be synchronized
+		 * @var	string	sql_id			The field name to collect/delete data for depending on the mode
+		 * @var	array	post_ids		Array with post ids for deleted attachment(s)
+		 * @var	array	topic_ids		Array with topic ids for deleted attachment(s)
+		 * @var	array	message_ids		Array with private message ids for deleted attachment(s)
+		 * @var	array	physical		Array with deleted attachment(s) physical file(s) data
+		 * @var	int		num_deleted		The number of deleted attachment(s) from the database
+		 * @var	int		space_removed	The size of deleted files(s) from the filesystem
+		 * @var	int		files_removed	The number of deleted file(s) from the filesystem
+		 * @since 3.1.7-RC1
+		 */
+		$vars = array(
+			'mode',
+			'ids',
+			'resync',
+			'sql_id',
+			'post_ids',
+			'topic_ids',
+			'message_ids',
+			'physical',
+			'num_deleted',
+			'space_removed',
+			'files_removed',
+		);
+		extract($this->dispatcher->trigger_event('core.delete_attachments_from_filesystem_after', compact($vars)));
+
+		$this->sql_id = $sql_id;
+		$this->post_ids = $post_ids;
+		$this->topic_ids = $topic_ids;
+		$this->message_ids = $message_ids;
+		$this->physical = $physical;
+		$this->num_deleted = $num_deleted;
+		unset($sql_id, $post_ids, $topic_ids, $message_ids, $physical, $num_deleted);
+
+		if ($space_removed || $files_removed)
+		{
+			$this->config->increment('upload_dir_size', $space_removed * (-1), false);
+			$this->config->increment('num_files', $files_removed * (-1), false);
+		}
+	}
+
+	/**
+	 * Delete attachment from filesystem
+	 *
+	 * @param string $filename Filename of attachment
+	 * @param string $mode Delete mode
+	 * @param bool $entry_removed Whether entry was removed. Defaults to false
+	 * @return bool True if file was removed, false if not
+	 */
+	public function unlink_attachment($filename, $mode = 'file', $entry_removed = false)
+	{
+		// Because of copying topics or modifications a physical filename could be assigned more than once. If so, do not remove the file itself.
+		$sql = 'SELECT COUNT(attach_id) AS num_entries
+		FROM ' . ATTACHMENTS_TABLE . "
+		WHERE physical_filename = '" . $this->db->sql_escape(utf8_basename($filename)) . "'";
+		$result = $this->db->sql_query($sql);
+		$num_entries = (int) $this->db->sql_fetchfield('num_entries');
+		$this->db->sql_freeresult($result);
+
+		// Do not remove file if at least one additional entry with the same name exist.
+		if (($entry_removed && $num_entries > 0) || (!$entry_removed && $num_entries > 1))
+		{
+			return false;
+		}
+
+		$filename = ($mode == 'thumbnail') ? 'thumb_' . utf8_basename($filename) : utf8_basename($filename);
+		$filepath = $this->phpbb_root_path . $this->config['upload_path'] . '/' . $filename;
+
+		try
+		{
+			if ($this->filesystem->exists($filepath))
+			{
+				$this->filesystem->remove($this->phpbb_root_path . $this->config['upload_path'] . '/' . $filename);
+				return true;
+			}
+		}
+		catch (\phpbb\filesystem\exception\filesystem_exception $exception)
+		{
+			// Fail is covered by return statement below
+		}
+
+		return false;
+	}
+}
diff --git a/phpBB/phpbb/attachment/manager.php b/phpBB/phpbb/attachment/manager.php
new file mode 100644
index 0000000000..3c47171b2f
--- /dev/null
+++ b/phpBB/phpbb/attachment/manager.php
@@ -0,0 +1,99 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\attachment;
+
+/**
+ * Attachment manager
+ */
+class manager
+{
+	/** @var delete Attachment delete class */
+	protected $delete;
+
+	/** @var resync Attachment resync class */
+	protected $resync;
+
+	/** @var upload Attachment upload class */
+	protected $upload;
+
+	/**
+	 * Constructor for attachment manager
+	 *
+	 * @param delete $delete Attachment delete class
+	 * @param resync $resync Attachment resync class
+	 * @param upload $upload Attachment upload class
+	 */
+	public function __construct(delete $delete, resync $resync, upload $upload)
+	{
+		$this->delete = $delete;
+		$this->resync = $resync;
+		$this->upload = $upload;
+	}
+
+	/**
+	 * Wrapper method for deleting attachments
+	 *
+	 * @param string $mode can be: post|message|topic|attach|user
+	 * @param mixed $ids can be: post_ids, message_ids, topic_ids, attach_ids, user_ids
+	 * @param bool $resync set this to false if you are deleting posts or topics
+	 *
+	 * @return int|bool Number of deleted attachments or false if something
+	 *			went wrong during attachment deletion
+	 */
+	public function delete($mode, $ids, $resync = true)
+	{
+		return $this->delete->delete($mode, $ids, $resync);
+	}
+
+	/**
+	 * Wrapper method for deleting attachments from filesystem
+	 *
+	 * @param string $filename Filename of attachment
+	 * @param string $mode Delete mode
+	 * @param bool $entry_removed Whether entry was removed. Defaults to false
+	 * @return bool True if file was removed, false if not
+	 */
+	public function unlink($filename, $mode = 'file', $entry_removed = false)
+	{
+		return $this->delete->unlink_attachment($filename, $mode, $entry_removed);
+	}
+
+	/**
+	 * Wrapper method for resyncing specified type
+	 *
+	 * @param string $type Type of resync
+	 * @param array $ids IDs to resync
+	 */
+	public function resync($type, $ids)
+	{
+		$this->resync->resync($type, $ids);
+	}
+
+	/**
+	 * Wrapper method for uploading attachment
+	 *
+	 * @param string			$form_name		The form name of the file upload input
+	 * @param int			$forum_id		The id of the forum
+	 * @param bool			$local			Whether the file is local or not
+	 * @param string			$local_storage	The path to the local file
+	 * @param bool			$is_message		Whether it is a PM or not
+	 * @param array		$local_filedata	An file data object created for the local file
+	 *
+	 * @return array File data array
+	 */
+	public function upload($form_name, $forum_id, $local = false, $local_storage = '', $is_message = false, $local_filedata = [])
+	{
+		return $this->upload->upload($form_name, $forum_id, $local, $local_storage, $is_message, $local_filedata);
+	}
+}
diff --git a/phpBB/phpbb/attachment/resync.php b/phpBB/phpbb/attachment/resync.php
new file mode 100644
index 0000000000..aeacf82511
--- /dev/null
+++ b/phpBB/phpbb/attachment/resync.php
@@ -0,0 +1,124 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\attachment;
+
+use \phpbb\db\driver\driver_interface;
+
+/**
+ * Attachment resync class
+ */
+class resync
+{
+	/** @var driver_interface */
+	protected $db;
+
+	/** @var string Attachment table SQL ID */
+	private $attach_sql_id;
+
+	/** @var string Resync table SQL ID  */
+	private $resync_sql_id;
+
+	/** @var string Resync SQL table */
+	private $resync_table;
+
+	/** @var string SQL where statement */
+	private $sql_where;
+
+	/**
+	 * Constructor for attachment resync class
+	 *
+	 * @param driver_interface $db Database driver
+	 */
+	public function __construct(driver_interface $db)
+	{
+		$this->db = $db;
+	}
+
+	/**
+	 * Set type constraints for attachment resync
+	 *
+	 * @param string $type Type of resync; can be: message|post|topic
+	 */
+	protected function set_type_constraints($type)
+	{
+		switch ($type)
+		{
+			case 'message':
+				$this->attach_sql_id = 'post_msg_id';
+				$this->sql_where = ' AND in_message = 1
+					AND is_orphan = 0';
+				$this->resync_table = PRIVMSGS_TABLE;
+				$this->resync_sql_id = 'msg_id';
+			break;
+
+			case 'post':
+				$this->attach_sql_id = 'post_msg_id';
+				$this->sql_where = ' AND in_message = 0
+					AND is_orphan = 0';
+				$this->resync_table = POSTS_TABLE;
+				$this->resync_sql_id = 'post_id';
+			break;
+
+			case 'topic':
+				$this->attach_sql_id = 'topic_id';
+				$this->sql_where = ' AND is_orphan = 0';
+				$this->resync_table = TOPICS_TABLE;
+				$this->resync_sql_id = 'topic_id';
+			break;
+		}
+	}
+
+	/**
+	 * Resync specified type
+	 *
+	 * @param string $type Type of resync
+	 * @param array $ids IDs to resync
+	 */
+	public function resync($type, $ids)
+	{
+		if (empty($type) || !is_array($ids) || !count($ids) || !in_array($type, array('post', 'topic', 'message')))
+		{
+			return;
+		}
+
+		$this->set_type_constraints($type);
+
+		// Just check which elements are still having an assigned attachment
+		// not orphaned by querying the attachments table
+		$sql = 'SELECT ' . $this->attach_sql_id . '
+			FROM ' . ATTACHMENTS_TABLE . '
+			WHERE ' . $this->db->sql_in_set($this->attach_sql_id, $ids)
+				. $this->sql_where;
+		$result = $this->db->sql_query($sql);
+
+		$remaining_ids = array();
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			$remaining_ids[] = $row[$this->attach_sql_id];
+		}
+		$this->db->sql_freeresult($result);
+
+		// Now only unset those ids remaining
+		$ids = array_diff($ids, $remaining_ids);
+
+		if (count($ids))
+		{
+			$sql = 'UPDATE ' . $this->resync_table . '
+				SET ' . $type . '_attachment = 0
+				WHERE ' . $this->db->sql_in_set($this->resync_sql_id, $ids);
+			$this->db->sql_query($sql);
+		}
+	}
+
+}
diff --git a/phpBB/phpbb/attachment/upload.php b/phpBB/phpbb/attachment/upload.php
new file mode 100644
index 0000000000..b9d32058db
--- /dev/null
+++ b/phpBB/phpbb/attachment/upload.php
@@ -0,0 +1,334 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\attachment;
+
+use phpbb\auth\auth;
+use \phpbb\cache\service;
+use \phpbb\config\config;
+use \phpbb\event\dispatcher;
+use \phpbb\language\language;
+use \phpbb\mimetype\guesser;
+use \phpbb\plupload\plupload;
+use \phpbb\user;
+
+/**
+ * Attachment upload class
+ */
+class upload
+{
+	/** @var auth */
+	protected $auth;
+
+	/** @var service */
+	protected $cache;
+
+	/** @var config */
+	protected $config;
+
+	/** @var \phpbb\files\upload Upload class */
+	protected $files_upload;
+
+	/** @var language */
+	protected $language;
+
+	/** @var guesser Mimetype guesser */
+	protected $mimetype_guesser;
+
+	/** @var dispatcher */
+	protected $phpbb_dispatcher;
+
+	/** @var plupload Plupload */
+	protected $plupload;
+
+	/** @var user */
+	protected $user;
+
+	/** @var \phpbb\files\filespec Current filespec instance */
+	private $file;
+
+	/** @var array File data */
+	private $file_data = array(
+		'error'	=> array()
+	);
+
+	/** @var array Extensions array */
+	private $extensions;
+
+	/**
+	 * Constructor for attachments upload class
+	 *
+	 * @param auth $auth
+	 * @param service $cache
+	 * @param config $config
+	 * @param \phpbb\files\upload $files_upload
+	 * @param language $language
+	 * @param guesser $mimetype_guesser
+	 * @param dispatcher $phpbb_dispatcher
+	 * @param plupload $plupload
+	 * @param user $user
+	 * @param $phpbb_root_path
+	 */
+	public function __construct(auth $auth, service $cache, config $config, \phpbb\files\upload $files_upload, language $language, guesser $mimetype_guesser, dispatcher $phpbb_dispatcher, plupload $plupload, user $user, $phpbb_root_path)
+	{
+		$this->auth = $auth;
+		$this->cache = $cache;
+		$this->config = $config;
+		$this->files_upload = $files_upload;
+		$this->language = $language;
+		$this->mimetype_guesser = $mimetype_guesser;
+		$this->phpbb_dispatcher = $phpbb_dispatcher;
+		$this->plupload = $plupload;
+		$this->user = $user;
+		$this->phpbb_root_path = $phpbb_root_path;
+	}
+
+	/**
+	 * Upload Attachment - filedata is generated here
+	 * Uses upload class
+	 *
+	 * @param string			$form_name		The form name of the file upload input
+	 * @param int			$forum_id		The id of the forum
+	 * @param bool			$local			Whether the file is local or not
+	 * @param string			$local_storage	The path to the local file
+	 * @param bool			$is_message		Whether it is a PM or not
+	 * @param array		$local_filedata	An file data object created for the local file
+	 *
+	 * @return array File data array
+	 */
+	public function upload($form_name, $forum_id, $local = false, $local_storage = '', $is_message = false, $local_filedata = array())
+	{
+		$this->init_files_upload($forum_id, $is_message);
+
+		$this->file_data['post_attach'] = $local || $this->files_upload->is_valid($form_name);
+
+		if (!$this->file_data['post_attach'])
+		{
+			$this->file_data['error'][] = $this->language->lang('NO_UPLOAD_FORM_FOUND');
+			return $this->file_data;
+		}
+
+		$this->file = ($local) ? $this->files_upload->handle_upload('files.types.local', $local_storage, $local_filedata) : $this->files_upload->handle_upload('files.types.form', $form_name);
+
+		if ($this->file->init_error())
+		{
+			$this->file_data['post_attach'] = false;
+			return $this->file_data;
+		}
+
+		// Whether the uploaded file is in the image category
+		$is_image = (isset($this->extensions[$this->file->get('extension')]['display_cat'])) ? $this->extensions[$this->file->get('extension')]['display_cat'] == ATTACHMENT_CATEGORY_IMAGE : false;
+
+		if (!$this->auth->acl_get('a_') && !$this->auth->acl_get('m_', $forum_id))
+		{
+			// Check Image Size, if it is an image
+			if ($is_image)
+			{
+				$this->file->upload->set_allowed_dimensions(0, 0, $this->config['img_max_width'], $this->config['img_max_height']);
+			}
+
+			// Admins and mods are allowed to exceed the allowed filesize
+			if (!empty($this->extensions[$this->file->get('extension')]['max_filesize']))
+			{
+				$allowed_filesize = $this->extensions[$this->file->get('extension')]['max_filesize'];
+			}
+			else
+			{
+				$allowed_filesize = ($is_message) ? $this->config['max_filesize_pm'] : $this->config['max_filesize'];
+			}
+
+			$this->file->upload->set_max_filesize($allowed_filesize);
+		}
+
+		$this->file->clean_filename('unique', $this->user->data['user_id'] . '_');
+
+		// Are we uploading an image *and* this image being within the image category?
+		// Only then perform additional image checks.
+		$this->file->move_file($this->config['upload_path'], false, !$is_image);
+
+		// Do we have to create a thumbnail?
+		$this->file_data['thumbnail'] = ($is_image && $this->config['img_create_thumbnail']) ? 1 : 0;
+
+		// Make sure the image category only holds valid images...
+		$this->check_image($is_image);
+
+		if (count($this->file->error))
+		{
+			$this->file->remove();
+			$this->file_data['error'] = array_merge($this->file_data['error'], $this->file->error);
+			$this->file_data['post_attach'] = false;
+
+			return $this->file_data;
+		}
+
+		$this->fill_file_data();
+
+		$filedata = $this->file_data;
+
+		/**
+		 * Event to modify uploaded file before submit to the post
+		 *
+		 * @event core.modify_uploaded_file
+		 * @var	array	filedata	Array containing uploaded file data
+		 * @var	bool	is_image	Flag indicating if the file is an image
+		 * @since 3.1.0-RC3
+		 */
+		$vars = array(
+			'filedata',
+			'is_image',
+		);
+		extract($this->phpbb_dispatcher->trigger_event('core.modify_uploaded_file', compact($vars)));
+		$this->file_data = $filedata;
+		unset($filedata);
+
+		// Check for attachment quota and free space
+		if (!$this->check_attach_quota() || !$this->check_disk_space())
+		{
+			return $this->file_data;
+		}
+
+		// Create Thumbnail
+		$this->create_thumbnail();
+
+		return $this->file_data;
+	}
+
+	/**
+	 * Create thumbnail for file if necessary
+	 *
+	 * @return array Updated $filedata
+	 */
+	protected function create_thumbnail()
+	{
+		if ($this->file_data['thumbnail'])
+		{
+			$source = $this->file->get('destination_file');
+			$destination = $this->file->get('destination_path') . '/thumb_' . $this->file->get('realname');
+
+			if (!create_thumbnail($source, $destination, $this->file->get('mimetype')))
+			{
+				$this->file_data['thumbnail'] = 0;
+			}
+		}
+	}
+
+	/**
+	 * Init files upload class
+	 *
+	 * @param int $forum_id Forum ID
+	 * @param bool $is_message Whether attachment is inside PM or not
+	 */
+	protected function init_files_upload($forum_id, $is_message)
+	{
+		if ($this->config['check_attachment_content'] && isset($this->config['mime_triggers']))
+		{
+			$this->files_upload->set_disallowed_content(explode('|', $this->config['mime_triggers']));
+		}
+		else if (!$this->config['check_attachment_content'])
+		{
+			$this->files_upload->set_disallowed_content(array());
+		}
+
+		$this->extensions = $this->cache->obtain_attach_extensions((($is_message) ? false : (int) $forum_id));
+		$this->files_upload->set_allowed_extensions(array_keys($this->extensions['_allowed_']));
+	}
+
+	/**
+	 * Check if uploaded file is really an image
+	 *
+	 * @param bool $is_image Whether file is image
+	 */
+	protected function check_image($is_image)
+	{
+		// Make sure the image category only holds valid images...
+		if ($is_image && !$this->file->is_image())
+		{
+			$this->file->remove();
+
+			if ($this->plupload && $this->plupload->is_active())
+			{
+				$this->plupload->emit_error(104, 'ATTACHED_IMAGE_NOT_IMAGE');
+			}
+
+			// If this error occurs a user tried to exploit an IE Bug by renaming extensions
+			// Since the image category is displaying content inline we need to catch this.
+			$this->file->set_error($this->language->lang('ATTACHED_IMAGE_NOT_IMAGE'));
+		}
+	}
+
+	/**
+	 * Check if attachment quota was reached
+	 *
+	 * @return bool False if attachment quota was reached, true if not
+	 */
+	protected function check_attach_quota()
+	{
+		if ($this->config['attachment_quota'])
+		{
+			if (intval($this->config['upload_dir_size']) + $this->file->get('filesize') > $this->config['attachment_quota'])
+			{
+				$this->file_data['error'][] = $this->language->lang('ATTACH_QUOTA_REACHED');
+				$this->file_data['post_attach'] = false;
+
+				$this->file->remove();
+
+				return false;
+			}
+		}
+
+		return true;
+	}
+
+	/**
+	 * Check if there is enough free space available on disk
+	 *
+	 * @return bool True if disk space is available, false if not
+	 */
+	protected function check_disk_space()
+	{
+		if ($free_space = @disk_free_space($this->phpbb_root_path . $this->config['upload_path']))
+		{
+			if ($free_space <= $this->file->get('filesize'))
+			{
+				if ($this->auth->acl_get('a_'))
+				{
+					$this->file_data['error'][] = $this->language->lang('ATTACH_DISK_FULL');
+				}
+				else
+				{
+					$this->file_data['error'][] = $this->language->lang('ATTACH_QUOTA_REACHED');
+				}
+				$this->file_data['post_attach'] = false;
+
+				$this->file->remove();
+
+				return false;
+			}
+		}
+
+		return true;
+	}
+
+	/**
+	 * Fills file data with file information and current time as filetime
+	 */
+	protected function fill_file_data()
+	{
+		$this->file_data['filesize'] = $this->file->get('filesize');
+		$this->file_data['mimetype'] = $this->file->get('mimetype');
+		$this->file_data['extension'] = $this->file->get('extension');
+		$this->file_data['physical_filename'] = $this->file->get('realname');
+		$this->file_data['real_filename'] = $this->file->get('uploadname');
+		$this->file_data['filetime'] = time();
+	}
+}
diff --git a/phpBB/phpbb/auth/auth.php b/phpBB/phpbb/auth/auth.php
index 37d4352c10..f46a21a8ae 100644
--- a/phpBB/phpbb/auth/auth.php
+++ b/phpBB/phpbb/auth/auth.php
@@ -72,8 +72,8 @@ class auth
 
 		// Verify bitstring length with options provided...
 		$renew = false;
-		$global_length = sizeof($this->acl_options['global']);
-		$local_length = sizeof($this->acl_options['local']);
+		$global_length = count($this->acl_options['global']);
+		$local_length = count($this->acl_options['local']);
 
 		// Specify comparing length (bitstring is padded to 31 bits)
 		$global_length = ($global_length % 31) ? ($global_length - ($global_length % 31) + 31) : $global_length;
@@ -236,7 +236,7 @@ class auth
 				$sql = 'SELECT forum_id
 					FROM ' . FORUMS_TABLE;
 
-				if (sizeof($this->acl))
+				if (count($this->acl))
 				{
 					$sql .= ' WHERE ' . $db->sql_in_set('forum_id', array_keys($this->acl), true);
 				}
@@ -278,7 +278,7 @@ class auth
 		}
 
 		// If we get forum_ids not having this permission, we need to fill the remaining parts
-		if ($negate && sizeof($this->acl_forum_ids))
+		if ($negate && count($this->acl_forum_ids))
 		{
 			foreach ($this->acl_forum_ids as $f)
 			{
@@ -455,7 +455,7 @@ class auth
 	{
 		$hold_str = '';
 
-		if (sizeof($hold_ary))
+		if (count($hold_ary))
 		{
 			ksort($hold_ary);
 
@@ -940,6 +940,7 @@ class auth
 		global $db, $user, $phpbb_root_path, $phpEx, $phpbb_container;
 		global $phpbb_dispatcher;
 
+		/* @var $provider_collection \phpbb\auth\provider_collection */
 		$provider_collection = $phpbb_container->get('auth.provider_collection');
 
 		$provider = $provider_collection->get_provider();
diff --git a/phpBB/phpbb/auth/provider/db.php b/phpBB/phpbb/auth/provider/db.php
index d8c5fb72de..1adf85ee05 100644
--- a/phpBB/phpbb/auth/provider/db.php
+++ b/phpBB/phpbb/auth/provider/db.php
@@ -155,6 +155,7 @@ class db extends \phpbb\auth\provider\base
 		// Every auth module is able to define what to do by itself...
 		if ($show_captcha)
 		{
+			/* @var $captcha_factory \phpbb\captcha\factory */
 			$captcha_factory = $this->phpbb_container->get('captcha.factory');
 			$captcha = $captcha_factory->get_instance($this->config['captcha_plugin']);
 			$captcha->init(CONFIRM_LOGIN);
diff --git a/phpBB/phpbb/auth/provider/ldap.php b/phpBB/phpbb/auth/provider/ldap.php
index c48b771ab0..0789a6234d 100644
--- a/phpBB/phpbb/auth/provider/ldap.php
+++ b/phpBB/phpbb/auth/provider/ldap.php
@@ -99,7 +99,7 @@ class ldap extends \phpbb\auth\provider\base
 
 		@ldap_close($ldap);
 
-		if (!is_array($result) || sizeof($result) < 2)
+		if (!is_array($result) || count($result) < 2)
 		{
 			return sprintf($this->user->lang['LDAP_NO_IDENTITY'], $this->user->data['username']);
 		}
@@ -192,7 +192,7 @@ class ldap extends \phpbb\auth\provider\base
 
 		$ldap_result = @ldap_get_entries($ldap, $search);
 
-		if (is_array($ldap_result) && sizeof($ldap_result) > 1)
+		if (is_array($ldap_result) && count($ldap_result) > 1)
 		{
 			if (@ldap_bind($ldap, $ldap_result[0]['dn'], htmlspecialchars_decode($password)))
 			{
diff --git a/phpBB/phpbb/auth/provider/oauth/oauth.php b/phpBB/phpbb/auth/provider/oauth/oauth.php
index bd2a414033..e3f8394bba 100644
--- a/phpBB/phpbb/auth/provider/oauth/oauth.php
+++ b/phpBB/phpbb/auth/provider/oauth/oauth.php
@@ -63,6 +63,13 @@ class oauth extends \phpbb\auth\provider\base
 	protected $auth_provider_oauth_token_storage_table;
 
 	/**
+	* OAuth state table
+	*
+	* @var string
+	*/
+	protected $auth_provider_oauth_state_table;
+
+	/**
 	* OAuth account association table
 	*
 	* @var string
@@ -127,6 +134,7 @@ class oauth extends \phpbb\auth\provider\base
 	* @param	\phpbb\request\request_interface	$request
 	* @param	\phpbb\user		$user
 	* @param	string			$auth_provider_oauth_token_storage_table
+	* @param	string			$auth_provider_oauth_state_table
 	* @param	string			$auth_provider_oauth_token_account_assoc
 	* @param	\phpbb\di\service_collection	$service_providers Contains \phpbb\auth\provider\oauth\service_interface
 	* @param	string			$users_table
@@ -135,7 +143,7 @@ class oauth extends \phpbb\auth\provider\base
 	* @param	string			$phpbb_root_path
 	* @param	string			$php_ext
 	*/
-	public function __construct(\phpbb\db\driver\driver_interface $db, \phpbb\config\config $config, \phpbb\passwords\manager $passwords_manager, \phpbb\request\request_interface $request, \phpbb\user $user, $auth_provider_oauth_token_storage_table, $auth_provider_oauth_token_account_assoc, \phpbb\di\service_collection $service_providers, $users_table, \Symfony\Component\DependencyInjection\ContainerInterface $phpbb_container, \phpbb\event\dispatcher_interface $dispatcher, $phpbb_root_path, $php_ext)
+	public function __construct(\phpbb\db\driver\driver_interface $db, \phpbb\config\config $config, \phpbb\passwords\manager $passwords_manager, \phpbb\request\request_interface $request, \phpbb\user $user, $auth_provider_oauth_token_storage_table, $auth_provider_oauth_state_table, $auth_provider_oauth_token_account_assoc, \phpbb\di\service_collection $service_providers, $users_table, \Symfony\Component\DependencyInjection\ContainerInterface $phpbb_container, \phpbb\event\dispatcher_interface $dispatcher, $phpbb_root_path, $php_ext)
 	{
 		$this->db = $db;
 		$this->config = $config;
@@ -143,6 +151,7 @@ class oauth extends \phpbb\auth\provider\base
 		$this->request = $request;
 		$this->user = $user;
 		$this->auth_provider_oauth_token_storage_table = $auth_provider_oauth_token_storage_table;
+		$this->auth_provider_oauth_state_table = $auth_provider_oauth_state_table;
 		$this->auth_provider_oauth_token_account_assoc = $auth_provider_oauth_token_account_assoc;
 		$this->service_providers = $service_providers;
 		$this->users_table = $users_table;
@@ -182,7 +191,7 @@ class oauth extends \phpbb\auth\provider\base
 			return $provider->login($username, $password);
 		}
 
-		// Requst the name of the OAuth service
+		// Request the name of the OAuth service
 		$service_name_original = $this->request->variable('oauth_service', '', false);
 		$service_name = 'auth.provider.oauth.service.' . strtolower($service_name_original);
 		if ($service_name_original === '' || !array_key_exists($service_name, $this->service_providers))
@@ -197,26 +206,57 @@ class oauth extends \phpbb\auth\provider\base
 		// Get the service credentials for the given service
 		$service_credentials = $this->service_providers[$service_name]->get_service_credentials();
 
-		$storage = new \phpbb\auth\provider\oauth\token_storage($this->db, $this->user, $this->auth_provider_oauth_token_storage_table);
+		$storage = new \phpbb\auth\provider\oauth\token_storage($this->db, $this->user, $this->auth_provider_oauth_token_storage_table, $this->auth_provider_oauth_state_table);
 		$query = 'mode=login&login=external&oauth_service=' . $service_name_original;
 		$service = $this->get_service($service_name_original, $storage, $service_credentials, $query, $this->service_providers[$service_name]->get_auth_scope());
 
-		if ($this->request->is_set('code', \phpbb\request\request_interface::GET))
+		if (($service::OAUTH_VERSION === 2 && $this->request->is_set('code', \phpbb\request\request_interface::GET))
+			|| ($service::OAUTH_VERSION === 1 && $this->request->is_set('oauth_token', \phpbb\request\request_interface::GET)))
 		{
 			$this->service_providers[$service_name]->set_external_service_provider($service);
 			$unique_id = $this->service_providers[$service_name]->perform_auth_login();
 
-			// Check to see if this provider is already assosciated with an account
+			/**
+			 * Check to see if this provider is already associated with an account.
+			 *
+			 * Enforcing a data type to make data contains strings and not integers,
+			 * so values are quoted in the SQL WHERE statement.
+			 */
 			$data = array(
-				'provider'	=> $service_name_original,
-				'oauth_provider_id'	=> $unique_id
+				'provider'			=> (string) $service_name_original,
+				'oauth_provider_id'	=> (string) $unique_id
 			);
+
 			$sql = 'SELECT user_id FROM ' . $this->auth_provider_oauth_token_account_assoc . '
 				WHERE ' . $this->db->sql_build_array('SELECT', $data);
 			$result = $this->db->sql_query($sql);
 			$row = $this->db->sql_fetchrow($result);
 			$this->db->sql_freeresult($result);
 
+			$redirect_data = array(
+				'auth_provider'				=> 'oauth',
+				'login_link_oauth_service'	=> $service_name_original,
+			);
+
+			/**
+			* Event is triggered before check if provider is already associated with an account
+			*
+			* @event core.oauth_login_after_check_if_provider_id_has_match
+			* @var	array									row				User row
+			* @var	array									data			Provider data
+			* @var	array									redirect_data	Data to be appended to the redirect url
+			* @var	\OAuth\Common\Service\ServiceInterface	service			OAuth service
+			* @since 3.2.3-RC1
+			* @changed 3.2.6-RC1 Added redirect_data
+			*/
+			$vars = array(
+				'row',
+				'data',
+				'redirect_data',
+				'service',
+			);
+			extract($this->dispatcher->trigger_event('core.oauth_login_after_check_if_provider_id_has_match', compact($vars)));
+
 			if (!$row)
 			{
 				// The user does not yet exist, ask to link or create profile
@@ -224,15 +264,12 @@ class oauth extends \phpbb\auth\provider\base
 					'status'		=> LOGIN_SUCCESS_LINK_PROFILE,
 					'error_msg'		=> 'LOGIN_OAUTH_ACCOUNT_NOT_LINKED',
 					'user_row'		=> array(),
-					'redirect_data'	=> array(
-						'auth_provider'				=> 'oauth',
-						'login_link_oauth_service'	=> $service_name_original,
-					),
+					'redirect_data'	=> $redirect_data,
 				);
 			}
 
 			// Retrieve the user's account
-			$sql = 'SELECT user_id, username, user_password, user_passchg, user_email, user_type, user_login_attempts
+			$sql = 'SELECT user_id, username, user_password, user_passchg, user_email, user_ip, user_type, user_login_attempts
 				FROM ' . $this->users_table . '
 					WHERE user_id = ' . (int) $row['user_id'];
 			$result = $this->db->sql_query($sql);
@@ -244,11 +281,36 @@ class oauth extends \phpbb\auth\provider\base
 				throw new \Exception('AUTH_PROVIDER_OAUTH_ERROR_INVALID_ENTRY');
 			}
 
+			/**
+			 * Check if the user is banned.
+			 * The fourth parameter, return, has to be true,
+			 * otherwise the OAuth login is still called and
+			 * an uncaught exception is thrown as there is no
+			 * token stored in the database.
+			 */
+			$ban = $this->user->check_ban($row['user_id'], $row['user_ip'], $row['user_email'], true);
+			if (!empty($ban))
+			{
+				$till_date = !empty($ban['ban_end']) ? $this->user->format_date($ban['ban_end']) : '';
+				$message = !empty($ban['ban_end']) ? 'BOARD_BAN_TIME' : 'BOARD_BAN_PERM';
+
+				$contact_link = phpbb_get_board_contact_link($this->config, $this->phpbb_root_path, $this->php_ext);
+				$message = $this->user->lang($message, $till_date, '<a href="' . $contact_link . '">', '</a>');
+				$message .= !empty($ban['ban_give_reason']) ? '<br /><br />' . $this->user->lang('BOARD_BAN_REASON', $ban['ban_give_reason']) : '';
+				$message .= !empty($ban['ban_triggered_by']) ? '<br /><br /><em>' . $this->user->lang('BAN_TRIGGERED_BY_' . strtoupper($ban['ban_triggered_by'])) . '</em>' : '';
+
+				return array(
+					'status'	=> LOGIN_BREAK,
+					'error_msg'	=> $message,
+					'user_row'	=> $row,
+				);
+			}
+
 			// Update token storage to store the user_id
 			$storage->set_user_id($row['user_id']);
 
 			/**
-			* Event is triggered after user is successfuly logged in via OAuth.
+			* Event is triggered after user is successfully logged in via OAuth.
 			*
 			* @event core.auth_oauth_login_after
 			* @var    array    row    User row
@@ -268,7 +330,15 @@ class oauth extends \phpbb\auth\provider\base
 		}
 		else
 		{
-			$url = $service->getAuthorizationUri();
+			if ($service::OAUTH_VERSION === 1)
+			{
+				$token = $service->requestRequestToken();
+				$url = $service->getAuthorizationUri(array('oauth_token' => $token->getRequestToken()));
+			}
+			else
+			{
+				$url = $service->getAuthorizationUri();
+			}
 			header('Location: ' . $url);
 		}
 	}
@@ -358,7 +428,7 @@ class oauth extends \phpbb\auth\provider\base
 			if ($credentials['key'] && $credentials['secret'])
 			{
 				$actual_name = str_replace('auth.provider.oauth.service.', '', $service_name);
-				$redirect_url = build_url(false) . '&login=external&oauth_service=' . $actual_name;
+				$redirect_url = generate_board_url() . '/ucp.' . $this->php_ext . '?mode=login&login=external&oauth_service=' . $actual_name;
 				$login_data['BLOCK_VARS'][$service_name] = array(
 					'REDIRECT_URL'	=> redirect($redirect_url, true),
 					'SERVICE_NAME'	=> $this->user->lang['AUTH_PROVIDER_OAUTH_SERVICE_' . strtoupper($actual_name)],
@@ -483,7 +553,7 @@ class oauth extends \phpbb\auth\provider\base
 	*/
 	protected function link_account_login_link(array $link_data, $service_name)
 	{
-		$storage = new \phpbb\auth\provider\oauth\token_storage($this->db, $this->user, $this->auth_provider_oauth_token_storage_table);
+		$storage = new \phpbb\auth\provider\oauth\token_storage($this->db, $this->user, $this->auth_provider_oauth_token_storage_table, $this->auth_provider_oauth_state_table);
 
 		// Check for an access token, they should have one
 		if (!$storage->has_access_token_by_session($service_name))
@@ -526,13 +596,14 @@ class oauth extends \phpbb\auth\provider\base
 	*/
 	protected function link_account_auth_link(array $link_data, $service_name)
 	{
-		$storage = new \phpbb\auth\provider\oauth\token_storage($this->db, $this->user, $this->auth_provider_oauth_token_storage_table);
+		$storage = new \phpbb\auth\provider\oauth\token_storage($this->db, $this->user, $this->auth_provider_oauth_token_storage_table, $this->auth_provider_oauth_state_table);
 		$query = 'i=ucp_auth_link&mode=auth_link&link=1&oauth_service=' . strtolower($link_data['oauth_service']);
 		$service_credentials = $this->service_providers[$service_name]->get_service_credentials();
 		$scopes = $this->service_providers[$service_name]->get_auth_scope();
 		$service = $this->get_service(strtolower($link_data['oauth_service']), $storage, $service_credentials, $query, $scopes);
 
-		if ($this->request->is_set('code', \phpbb\request\request_interface::GET))
+		if (($service::OAUTH_VERSION === 2 && $this->request->is_set('code', \phpbb\request\request_interface::GET))
+			|| ($service::OAUTH_VERSION === 1 && $this->request->is_set('oauth_token', \phpbb\request\request_interface::GET)))
 		{
 			$this->service_providers[$service_name]->set_external_service_provider($service);
 			$unique_id = $this->service_providers[$service_name]->perform_auth_login();
@@ -548,7 +619,15 @@ class oauth extends \phpbb\auth\provider\base
 		}
 		else
 		{
-			$url = $service->getAuthorizationUri();
+			if ($service::OAUTH_VERSION === 1)
+			{
+				$token = $service->requestRequestToken();
+				$url = $service->getAuthorizationUri(array('oauth_token' => $token->getRequestToken()));
+			}
+			else
+			{
+				$url = $service->getAuthorizationUri();
+			}
 			header('Location: ' . $url);
 		}
 	}
@@ -560,6 +639,21 @@ class oauth extends \phpbb\auth\provider\base
 	*/
 	protected function link_account_perform_link(array $data)
 	{
+		// Check if the external account is already associated with other user
+		$sql = 'SELECT user_id
+			FROM ' . $this->auth_provider_oauth_token_account_assoc . "
+			WHERE provider = '" . $this->db->sql_escape($data['provider']) . "'
+				AND oauth_provider_id = '" . $this->db->sql_escape($data['oauth_provider_id']) . "'";
+		$result = $this->db->sql_query($sql);
+		$row = $this->db->sql_fetchrow($result);
+		$this->db->sql_freeresult($result);
+
+		if ($row)
+		{
+			trigger_error('AUTH_PROVIDER_OAUTH_ERROR_ALREADY_LINKED');
+		}
+
+		// Link account
 		$sql = 'INSERT INTO ' . $this->auth_provider_oauth_token_account_assoc . '
 			' . $this->db->sql_build_array('INSERT', $data);
 		$this->db->sql_query($sql);
@@ -583,7 +677,7 @@ class oauth extends \phpbb\auth\provider\base
 	public function logout($data, $new_session)
 	{
 		// Clear all tokens belonging to the user
-		$storage = new \phpbb\auth\provider\oauth\token_storage($this->db, $this->user, $this->auth_provider_oauth_token_storage_table);
+		$storage = new \phpbb\auth\provider\oauth\token_storage($this->db, $this->user, $this->auth_provider_oauth_token_storage_table, $this->auth_provider_oauth_state_table);
 		$storage->clearAllTokens();
 
 		return;
@@ -608,7 +702,7 @@ class oauth extends \phpbb\auth\provider\base
 
 		$oauth_user_ids = array();
 
-		if ($rows !== false && sizeof($rows))
+		if ($rows !== false && count($rows))
 		{
 			foreach ($rows as $row)
 			{
@@ -631,6 +725,7 @@ class oauth extends \phpbb\auth\provider\base
 						'oauth_service' => $actual_name,
 					),
 
+					'SERVICE_ID'	=> $actual_name,
 					'SERVICE_NAME'	=> $this->user->lang['AUTH_PROVIDER_OAUTH_SERVICE_' . strtoupper($actual_name)],
 					'UNIQUE_ID'		=> (isset($oauth_user_ids[$actual_name])) ? $oauth_user_ids[$actual_name] : null,
 				);
@@ -664,9 +759,9 @@ class oauth extends \phpbb\auth\provider\base
 				AND user_id = " . (int) $user_id;
 		$this->db->sql_query($sql);
 
-		// Clear all tokens belonging to the user on this servce
+		// Clear all tokens belonging to the user on this service
 		$service_name = 'auth.provider.oauth.service.' . strtolower($link_data['oauth_service']);
-		$storage = new \phpbb\auth\provider\oauth\token_storage($this->db, $this->user, $this->auth_provider_oauth_token_storage_table);
+		$storage = new \phpbb\auth\provider\oauth\token_storage($this->db, $this->user, $this->auth_provider_oauth_token_storage_table, $this->auth_provider_oauth_state_table);
 		$storage->clearToken($service_name);
 	}
 }
diff --git a/phpBB/phpbb/auth/provider/oauth/service/twitter.php b/phpBB/phpbb/auth/provider/oauth/service/twitter.php
new file mode 100644
index 0000000000..06beac51e2
--- /dev/null
+++ b/phpBB/phpbb/auth/provider/oauth/service/twitter.php
@@ -0,0 +1,102 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\auth\provider\oauth\service;
+
+/**
+* Twitter OAuth service
+*/
+class twitter extends \phpbb\auth\provider\oauth\service\base
+{
+	/**
+	* phpBB config
+	*
+	* @var \phpbb\config\config
+	*/
+	protected $config;
+
+	/**
+	* phpBB request
+	*
+	* @var \phpbb\request\request_interface
+	*/
+	protected $request;
+
+	/**
+	* Constructor
+	*
+	* @param	\phpbb\config\config				$config
+	* @param	\phpbb\request\request_interface	$request
+	*/
+	public function __construct(\phpbb\config\config $config, \phpbb\request\request_interface $request)
+	{
+		$this->config = $config;
+		$this->request = $request;
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function get_service_credentials()
+	{
+		return array(
+			'key'		=> $this->config['auth_oauth_twitter_key'],
+			'secret'	=> $this->config['auth_oauth_twitter_secret'],
+		);
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function perform_auth_login()
+	{
+		if (!($this->service_provider instanceof \OAuth\OAuth1\Service\Twitter))
+		{
+			throw new \phpbb\auth\provider\oauth\service\exception('AUTH_PROVIDER_OAUTH_ERROR_INVALID_SERVICE_TYPE');
+		}
+
+		$storage = $this->service_provider->getStorage();
+		$token = $storage->retrieveAccessToken('Twitter');
+		$tokensecret = $token->getRequestTokenSecret();
+
+		// This was a callback request from twitter, get the token
+		$this->service_provider->requestAccessToken(
+			$this->request->variable('oauth_token', ''),
+			$this->request->variable('oauth_verifier', ''),
+			$tokensecret
+		);
+
+		// Send a request with it
+		$result = json_decode($this->service_provider->request('account/verify_credentials.json'), true);
+
+		// Return the unique identifier returned from twitter
+		return $result['id'];
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function perform_token_auth()
+	{
+		if (!($this->service_provider instanceof \OAuth\OAuth1\Service\Twitter))
+		{
+			throw new \phpbb\auth\provider\oauth\service\exception('AUTH_PROVIDER_OAUTH_ERROR_INVALID_SERVICE_TYPE');
+		}
+
+		// Send a request with it
+		$result = json_decode($this->service_provider->request('account/verify_credentials.json'), true);
+
+		// Return the unique identifier returned from twitter
+		return $result['id'];
+	}
+}
diff --git a/phpBB/phpbb/auth/provider/oauth/token_storage.php b/phpBB/phpbb/auth/provider/oauth/token_storage.php
index 9b6afae255..b0c2fd0d62 100644
--- a/phpBB/phpbb/auth/provider/oauth/token_storage.php
+++ b/phpBB/phpbb/auth/provider/oauth/token_storage.php
@@ -17,6 +17,7 @@ use OAuth\OAuth1\Token\StdOAuth1Token;
 use OAuth\Common\Token\TokenInterface;
 use OAuth\Common\Storage\TokenStorageInterface;
 use OAuth\Common\Storage\Exception\TokenNotFoundException;
+use OAuth\Common\Storage\Exception\AuthorizationStateNotFoundException;
 
 /**
 * OAuth storage wrapper for phpbb's cache
@@ -42,7 +43,14 @@ class token_storage implements TokenStorageInterface
 	*
 	* @var string
 	*/
-	protected $auth_provider_oauth_table;
+	protected $oauth_token_table;
+
+	/**
+	* OAuth state table
+	*
+	* @var string
+	*/
+	protected $oauth_state_table;
 
 	/**
 	* @var object|TokenInterface
@@ -50,17 +58,24 @@ class token_storage implements TokenStorageInterface
 	protected $cachedToken;
 
 	/**
+	* @var string
+	*/
+	protected $cachedState;
+
+	/**
 	* Creates token storage for phpBB.
 	*
 	* @param	\phpbb\db\driver\driver_interface	$db
 	* @param	\phpbb\user		$user
-	* @param	string			$auth_provider_oauth_table
+	* @param	string			$oauth_token_table
+	* @param	string			$oauth_state_table
 	*/
-	public function __construct(\phpbb\db\driver\driver_interface $db, \phpbb\user $user, $auth_provider_oauth_table)
+	public function __construct(\phpbb\db\driver\driver_interface $db, \phpbb\user $user, $oauth_token_table, $oauth_state_table)
 	{
 		$this->db = $db;
 		$this->user = $user;
-		$this->auth_provider_oauth_table = $auth_provider_oauth_table;
+		$this->oauth_token_table = $oauth_token_table;
+		$this->oauth_state_table = $oauth_state_table;
 	}
 
 	/**
@@ -98,15 +113,31 @@ class token_storage implements TokenStorageInterface
 		$this->cachedToken = $token;
 
 		$data = array(
-			'user_id'		=> (int) $this->user->data['user_id'],
-			'provider'		=> $service,
 			'oauth_token'	=> $this->json_encode_token($token),
-			'session_id'	=> $this->user->data['session_id'],
 		);
 
-		$sql = 'INSERT INTO ' . $this->auth_provider_oauth_table . '
-			' . $this->db->sql_build_array('INSERT', $data);
+		$sql = 'UPDATE ' . $this->oauth_token_table . '
+				SET ' . $this->db->sql_build_array('UPDATE', $data) . '
+				WHERE user_id = ' . (int) $this->user->data['user_id'] . '
+					' . ((int) $this->user->data['user_id'] === ANONYMOUS ? "AND session_id = '" . $this->db->sql_escape($this->user->data['session_id']) . "'" : '') . "
+					AND provider = '" . $this->db->sql_escape($service) . "'";
 		$this->db->sql_query($sql);
+
+		if (!$this->db->sql_affectedrows())
+		{
+			$data = array(
+				'user_id'		=> (int) $this->user->data['user_id'],
+				'provider'		=> $service,
+				'oauth_token'	=> $this->json_encode_token($token),
+				'session_id'	=> $this->user->data['session_id'],
+			);
+
+			$sql = 'INSERT INTO ' . $this->oauth_token_table . $this->db->sql_build_array('INSERT', $data);
+
+			$this->db->sql_query($sql);
+		}
+
+		return $this;
 	}
 
 	/**
@@ -143,7 +174,7 @@ class token_storage implements TokenStorageInterface
 
 		$this->cachedToken = null;
 
-		$sql = 'DELETE FROM ' . $this->auth_provider_oauth_table . '
+		$sql = 'DELETE FROM ' . $this->oauth_token_table . '
 			WHERE user_id = ' . (int) $this->user->data['user_id'] . "
 				AND provider = '" . $this->db->sql_escape($service) . "'";
 
@@ -153,6 +184,8 @@ class token_storage implements TokenStorageInterface
 		}
 
 		$this->db->sql_query($sql);
+
+		return $this;
 	}
 
 	/**
@@ -162,7 +195,7 @@ class token_storage implements TokenStorageInterface
 	{
 		$this->cachedToken = null;
 
-		$sql = 'DELETE FROM ' . $this->auth_provider_oauth_table . '
+		$sql = 'DELETE FROM ' . $this->oauth_token_table . '
 			WHERE user_id = ' . (int) $this->user->data['user_id'];
 
 		if ((int) $this->user->data['user_id'] === ANONYMOUS)
@@ -171,6 +204,124 @@ class token_storage implements TokenStorageInterface
 		}
 
 		$this->db->sql_query($sql);
+
+		return $this;
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function storeAuthorizationState($service, $state)
+	{
+		$service = $this->get_service_name_for_db($service);
+
+		$this->cachedState = $state;
+
+		$data = array(
+			'user_id'		=> (int) $this->user->data['user_id'],
+			'provider'		=> $service,
+			'oauth_state'	=> $state,
+			'session_id'	=> $this->user->data['session_id'],
+		);
+
+		$sql = 'INSERT INTO ' . $this->oauth_state_table . '
+			' . $this->db->sql_build_array('INSERT', $data);
+		$this->db->sql_query($sql);
+
+		return $this;
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function hasAuthorizationState($service)
+	{
+		$service = $this->get_service_name_for_db($service);
+
+		if ($this->cachedState)
+		{
+			return true;
+		}
+
+		$data = array(
+			'user_id'	=> (int) $this->user->data['user_id'],
+			'provider'	=> $service,
+		);
+
+		if ((int) $this->user->data['user_id'] === ANONYMOUS)
+		{
+			$data['session_id']	= $this->user->data['session_id'];
+		}
+
+		return (bool) $this->get_state_row($data);
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function retrieveAuthorizationState($service)
+	{
+		$service = $this->get_service_name_for_db($service);
+
+		if ($this->cachedState)
+		{
+			return $this->cachedState;
+		}
+
+		$data = array(
+			'user_id'	=> (int) $this->user->data['user_id'],
+			'provider'	=> $service,
+		);
+
+		if ((int) $this->user->data['user_id'] === ANONYMOUS)
+		{
+			$data['session_id']	= $this->user->data['session_id'];
+		}
+
+		return $this->get_state_row($data);
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function clearAuthorizationState($service)
+	{
+		$service = $this->get_service_name_for_db($service);
+
+		$this->cachedState = null;
+
+		$sql = 'DELETE FROM ' . $this->oauth_state_table . '
+			WHERE user_id = ' . (int) $this->user->data['user_id'] . "
+				AND provider = '" . $this->db->sql_escape($service) . "'";
+
+		if ((int) $this->user->data['user_id'] === ANONYMOUS)
+		{
+			$sql .= " AND session_id = '" . $this->db->sql_escape($this->user->data['session_id']) . "'";
+		}
+
+		$this->db->sql_query($sql);
+
+		return $this;
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function clearAllAuthorizationStates()
+	{
+		$this->cachedState = null;
+
+		$sql = 'DELETE FROM ' . $this->oauth_state_table . '
+			WHERE user_id = ' . (int) $this->user->data['user_id'];
+
+		if ((int) $this->user->data['user_id'] === ANONYMOUS)
+		{
+			$sql .= " AND session_id = '" . $this->db->sql_escape($this->user->data['session_id']) . "'";
+		}
+
+		$this->db->sql_query($sql);
+
+		return $this;
 	}
 
 	/**
@@ -185,7 +336,7 @@ class token_storage implements TokenStorageInterface
 			return;
 		}
 
-		$sql = 'UPDATE ' . $this->auth_provider_oauth_table . '
+		$sql = 'UPDATE ' . $this->oauth_token_table . '
 			SET ' . $this->db->sql_build_array('UPDATE', array(
 					'user_id' => (int) $user_id
 				)) . '
@@ -218,6 +369,29 @@ class token_storage implements TokenStorageInterface
 	}
 
 	/**
+	* Checks to see if a state exists solely by the session_id of the user
+	*
+	* @param	string	$service	The name of the OAuth service
+	* @return	bool	true if they have state, false if they don't
+	*/
+	public function has_state_by_session($service)
+	{
+		$service = $this->get_service_name_for_db($service);
+
+		if ($this->cachedState)
+		{
+			return true;
+		}
+
+		$data = array(
+			'session_id'	=> $this->user->data['session_id'],
+			'provider'		=> $service,
+		);
+
+		return (bool) $this->get_state_row($data);
+	}
+
+	/**
 	* A helper function that performs the query for has access token functions
 	*
 	* @param	array	$data
@@ -245,6 +419,23 @@ class token_storage implements TokenStorageInterface
 		return $this->_retrieve_access_token($data);
 	}
 
+	public function retrieve_state_by_session($service)
+	{
+		$service = $this->get_service_name_for_db($service);
+
+		if ($this->cachedState)
+		{
+			return $this->cachedState;
+		}
+
+		$data = array(
+			'session_id'	=> $this->user->data['session_id'],
+			'provider'	=> $service,
+		);
+
+		return $this->_retrieve_state($data);
+	}
+
 	/**
 	* A helper function that performs the query for retrieve access token functions
 	* Also checks if the token is a valid token
@@ -276,6 +467,26 @@ class token_storage implements TokenStorageInterface
 	}
 
 	/**
+	 * A helper function that performs the query for retrieve state functions
+	 *
+	 * @param	array	$data
+	 * @return	mixed
+	 * @throws \OAuth\Common\Storage\Exception\AuthorizationStateNotFoundException
+	 */
+	protected function _retrieve_state($data)
+	{
+		$row = $this->get_state_row($data);
+
+		if (!$row)
+		{
+			throw new AuthorizationStateNotFoundException();
+		}
+
+		$this->cachedState = $row['oauth_state'];
+		return $this->cachedState;
+	}
+
+	/**
 	* A helper function that performs the query for retrieving an access token
 	*
 	* @param	array	$data
@@ -283,7 +494,24 @@ class token_storage implements TokenStorageInterface
 	*/
 	protected function get_access_token_row($data)
 	{
-		$sql = 'SELECT oauth_token FROM ' . $this->auth_provider_oauth_table . '
+		$sql = 'SELECT oauth_token FROM ' . $this->oauth_token_table . '
+			WHERE ' . $this->db->sql_build_array('SELECT', $data);
+		$result = $this->db->sql_query($sql);
+		$row = $this->db->sql_fetchrow($result);
+		$this->db->sql_freeresult($result);
+
+		return $row;
+	}
+
+	/**
+	 * A helper function that performs the query for retrieving a state
+	 *
+	 * @param	array	$data
+	 * @return	mixed
+	 */
+	protected function get_state_row($data)
+	{
+		$sql = 'SELECT oauth_state FROM ' . $this->oauth_state_table . '
 			WHERE ' . $this->db->sql_build_array('SELECT', $data);
 		$result = $this->db->sql_query($sql);
 		$row = $this->db->sql_fetchrow($result);
diff --git a/phpBB/phpbb/auth/provider/provider_interface.php b/phpBB/phpbb/auth/provider/provider_interface.php
index 35e0f559a1..463324ff46 100644
--- a/phpBB/phpbb/auth/provider/provider_interface.php
+++ b/phpBB/phpbb/auth/provider/provider_interface.php
@@ -71,9 +71,10 @@ interface provider_interface
 	 * options with whatever configuraton values are passed to it as an array.
 	 * It then returns the name of the acp file related to this authentication
 	 * provider.
-	 * @param	array	$new_config Contains the new configuration values that
-	 *								have been set in acp_board.
-	 * @return	array|null		Returns null if not implemented or an array with
+	 *
+	 * @param \phpbb\config\config	$new_config	Contains the new configuration values
+	 * 											that have been set in acp_board.
+	 * @return array|null		Returns null if not implemented or an array with
 	 *							the template file name and an array of the vars
 	 *							that the template needs that must conform to the
 	 *							following example:
diff --git a/phpBB/phpbb/avatar/driver/driver.php b/phpBB/phpbb/avatar/driver/driver.php
index ad186635f2..45681f3e59 100644
--- a/phpBB/phpbb/avatar/driver/driver.php
+++ b/phpBB/phpbb/avatar/driver/driver.php
@@ -30,6 +30,9 @@ abstract class driver implements \phpbb\avatar\driver\driver_interface
 	*/
 	protected $config;
 
+	/** @var \FastImageSize\FastImageSize */
+	protected $imagesize;
+
 	/**
 	* Current $phpbb_root_path
 	* @var string
@@ -73,14 +76,16 @@ abstract class driver implements \phpbb\avatar\driver\driver_interface
 	* Construct a driver object
 	*
 	* @param \phpbb\config\config $config phpBB configuration
+	* @param \FastImageSize\FastImageSize $imagesize FastImageSize class
 	* @param string $phpbb_root_path Path to the phpBB root
 	* @param string $php_ext PHP file extension
 	* @param \phpbb\path_helper $path_helper phpBB path helper
 	* @param \phpbb\cache\driver\driver_interface $cache Cache driver
 	*/
-	public function __construct(\phpbb\config\config $config, $phpbb_root_path, $php_ext, \phpbb\path_helper $path_helper, \phpbb\cache\driver\driver_interface $cache = null)
+	public function __construct(\phpbb\config\config $config, \FastImageSize\FastImageSize $imagesize, $phpbb_root_path, $php_ext, \phpbb\path_helper $path_helper, \phpbb\cache\driver\driver_interface $cache = null)
 	{
 		$this->config = $config;
+		$this->imagesize = $imagesize;
 		$this->phpbb_root_path = $phpbb_root_path;
 		$this->php_ext = $php_ext;
 		$this->path_helper = $path_helper;
diff --git a/phpBB/phpbb/avatar/driver/gravatar.php b/phpBB/phpbb/avatar/driver/gravatar.php
index 7a43b55852..3e4e7ff98b 100644
--- a/phpBB/phpbb/avatar/driver/gravatar.php
+++ b/phpBB/phpbb/avatar/driver/gravatar.php
@@ -98,8 +98,8 @@ class gravatar extends \phpbb\avatar\driver\driver
 			return false;
 		}
 
-		// Make sure getimagesize works...
-		if (function_exists('getimagesize') && ($row['avatar_width'] <= 0 || $row['avatar_height'] <= 0))
+		// Get image dimensions if they are not set
+		if ($row['avatar_width'] <= 0 || $row['avatar_height'] <= 0)
 		{
 			/**
 			* default to the minimum of the maximum allowed avatar size if the size
@@ -108,20 +108,20 @@ class gravatar extends \phpbb\avatar\driver\driver
 			$row['avatar_width'] = $row['avatar_height'] = min($this->config['avatar_max_width'], $this->config['avatar_max_height']);
 			$url = $this->get_gravatar_url($row);
 
-			if (($row['avatar_width'] <= 0 || $row['avatar_height'] <= 0) && (($image_data = getimagesize($url)) === false))
+			if (($row['avatar_width'] <= 0 || $row['avatar_height'] <= 0) && (($image_data = $this->imagesize->getImageSize($url)) === false))
 			{
 				$error[] = 'UNABLE_GET_IMAGE_SIZE';
 				return false;
 			}
 
-			if (!empty($image_data) && ($image_data[0] <= 0 || $image_data[1] <= 0))
+			if (!empty($image_data) && ($image_data['width'] <= 0 || $image_data['width'] <= 0))
 			{
 				$error[] = 'AVATAR_NO_SIZE';
 				return false;
 			}
 
-			$row['avatar_width'] = ($row['avatar_width'] && $row['avatar_height']) ? $row['avatar_width'] : $image_data[0];
-			$row['avatar_height'] = ($row['avatar_width'] && $row['avatar_height']) ? $row['avatar_height'] : $image_data[1];
+			$row['avatar_width'] = ($row['avatar_width'] && $row['avatar_height']) ? $row['avatar_width'] : $image_data['width'];
+			$row['avatar_height'] = ($row['avatar_width'] && $row['avatar_height']) ? $row['avatar_height'] : $image_data['height'];
 		}
 
 		if ($row['avatar_width'] <= 0 || $row['avatar_height'] <= 0)
diff --git a/phpBB/phpbb/avatar/driver/local.php b/phpBB/phpbb/avatar/driver/local.php
index 75c384f31e..4b84e4201c 100644
--- a/phpBB/phpbb/avatar/driver/local.php
+++ b/phpBB/phpbb/avatar/driver/local.php
@@ -64,7 +64,7 @@ class local extends \phpbb\avatar\driver\driver
 
 			$table_cols = isset($row['avatar_gallery_cols']) ? $row['avatar_gallery_cols'] : 4;
 			$row_count = $col_count = $avatar_pos = 0;
-			$avatar_count = sizeof($avatar_list[$category]);
+			$avatar_count = count($avatar_list[$category]);
 
 			reset($avatar_list[$category]);
 
@@ -158,7 +158,7 @@ class local extends \phpbb\avatar\driver\driver
 	*/
 	protected function get_avatar_list($user)
 	{
-		$avatar_list = ($this->cache == null) ? false : $this->cache->get('_avatar_local_list');
+		$avatar_list = ($this->cache == null) ? false : $this->cache->get('_avatar_local_list_' . $user->data['user_lang']);
 
 		if ($avatar_list === false)
 		{
@@ -174,13 +174,15 @@ class local extends \phpbb\avatar\driver\driver
 				// Match all images in the gallery folder
 				if (preg_match('#^[^&\'"<>]+\.(?:' . implode('|', $this->allowed_extensions) . ')$#i', $image) && is_file($file_path . '/' . $image))
 				{
-					if (function_exists('getimagesize'))
+					$dims = $this->imagesize->getImageSize($file_path . '/' . $image);
+
+					if ($dims === false)
 					{
-						$dims = getimagesize($file_path . '/' . $image);
+						$dims = array(0, 0);
 					}
 					else
 					{
-						$dims = array(0, 0);
+						$dims = array($dims['width'], $dims['height']);
 					}
 					$cat = ($path == $file_path) ? $user->lang['NO_AVATAR_CATEGORY'] : str_replace("$path/", '', $file_path);
 					$avatar_list[$cat][$image] = array(
@@ -196,7 +198,7 @@ class local extends \phpbb\avatar\driver\driver
 
 			if ($this->cache != null)
 			{
-				$this->cache->put('_avatar_local_list', $avatar_list, 86400);
+				$this->cache->put('_avatar_local_list_' . $user->data['user_lang'], $avatar_list, 86400);
 			}
 		}
 
diff --git a/phpBB/phpbb/avatar/driver/remote.php b/phpBB/phpbb/avatar/driver/remote.php
index 2811cc2389..b16549ffb7 100644
--- a/phpBB/phpbb/avatar/driver/remote.php
+++ b/phpBB/phpbb/avatar/driver/remote.php
@@ -49,6 +49,8 @@ class remote extends \phpbb\avatar\driver\driver
 	*/
 	public function process_form($request, $template, $user, $row, &$error)
 	{
+		global $phpbb_dispatcher;
+
 		$url = $request->variable('avatar_remote_url', '');
 		$width = $request->variable('avatar_remote_width', 0);
 		$height = $request->variable('avatar_remote_height', 0);
@@ -84,6 +86,24 @@ class remote extends \phpbb\avatar\driver\driver
 			return false;
 		}
 
+		/**
+		 * Event to make custom validation of avatar upload
+		 *
+		 * @event core.ucp_profile_avatar_upload_validation
+		 * @var	string	url		Image url
+		 * @var	string	width	Image width
+		 * @var	string	height	Image height
+		 * @var	array	error	Error message array
+		 * @since 3.2.9-RC1
+		 */
+		$vars = array('url', 'width', 'height', 'error');
+		extract($phpbb_dispatcher->trigger_event('core.ucp_profile_avatar_upload_validation', compact($vars)));
+
+		if (!empty($error))
+		{
+			return false;
+		}
+
 		// Check if this url looks alright
 		// Do not allow specifying the port (see RFC 3986) or IP addresses
 		if (!preg_match('#^(http|https|ftp)://(?:(.*?\.)*?[a-z0-9\-]+?\.[a-z]{2,4}|(?:\d{1,3}\.){3,5}\d{1,3}):?([0-9]*?).*?\.('. implode('|', $this->allowed_extensions) . ')$#i', $url) ||
@@ -95,38 +115,30 @@ class remote extends \phpbb\avatar\driver\driver
 			return false;
 		}
 
-		// Make sure getimagesize works...
-		if (function_exists('getimagesize'))
+		// Get image dimensions
+		if (($width <= 0 || $height <= 0) && (($image_data = $this->imagesize->getImageSize($url)) === false))
 		{
-			if (($width <= 0 || $height <= 0) && (($image_data = @getimagesize($url)) === false))
-			{
-				$error[] = 'UNABLE_GET_IMAGE_SIZE';
-				return false;
-			}
-
-			if (!empty($image_data) && ($image_data[0] <= 0 || $image_data[1] <= 0))
-			{
-				$error[] = 'AVATAR_NO_SIZE';
-				return false;
-			}
-
-			$width = ($width && $height) ? $width : $image_data[0];
-			$height = ($width && $height) ? $height : $image_data[1];
+			$error[] = 'UNABLE_GET_IMAGE_SIZE';
+			return false;
 		}
 
-		if ($width <= 0 || $height <= 0)
+		if (!empty($image_data) && ($image_data['width'] <= 0 || $image_data['height'] <= 0))
 		{
 			$error[] = 'AVATAR_NO_SIZE';
 			return false;
 		}
 
-		if (!class_exists('fileupload'))
+		$width = ($width && $height) ? $width : $image_data['width'];
+		$height = ($width && $height) ? $height : $image_data['height'];
+
+		if ($width <= 0 || $height <= 0)
 		{
-			include($this->phpbb_root_path . 'includes/functions_upload.' . $this->php_ext);
+			$error[] = 'AVATAR_NO_SIZE';
+			return false;
 		}
 
-		$types = \fileupload::image_types();
-		$extension = strtolower(\filespec::get_extension($url));
+		$types = \phpbb\files\upload::image_types();
+		$extension = strtolower(\phpbb\files\filespec::get_extension($url));
 
 		// Check if this is actually an image
 		if ($file_stream = @fopen($url, 'r'))
@@ -175,15 +187,15 @@ class remote extends \phpbb\avatar\driver\driver
 			return false;
 		}
 
-		if (!empty($image_data) && (!isset($types[$image_data[2]]) || !in_array($extension, $types[$image_data[2]])))
+		if (!empty($image_data) && (!isset($types[$image_data['type']]) || !in_array($extension, $types[$image_data['type']])))
 		{
-			if (!isset($types[$image_data[2]]))
+			if (!isset($types[$image_data['type']]))
 			{
 				$error[] = 'UNABLE_GET_IMAGE_SIZE';
 			}
 			else
 			{
-				$error[] = array('IMAGE_FILETYPE_MISMATCH', $types[$image_data[2]][0], $extension);
+				$error[] = array('IMAGE_FILETYPE_MISMATCH', $types[$image_data['type']][0], $extension);
 			}
 
 			return false;
diff --git a/phpBB/phpbb/avatar/driver/upload.php b/phpBB/phpbb/avatar/driver/upload.php
index 0dae5607f6..a012bb15b6 100644
--- a/phpBB/phpbb/avatar/driver/upload.php
+++ b/phpBB/phpbb/avatar/driver/upload.php
@@ -19,9 +19,9 @@ namespace phpbb\avatar\driver;
 class upload extends \phpbb\avatar\driver\driver
 {
 	/**
-	* @var \phpbb\mimetype\guesser
-	*/
-	protected $mimetype_guesser;
+	 * @var \phpbb\filesystem\filesystem_interface
+	 */
+	protected $filesystem;
 
 	/**
 	* @var \phpbb\event\dispatcher_interface
@@ -29,24 +29,31 @@ class upload extends \phpbb\avatar\driver\driver
 	protected $dispatcher;
 
 	/**
+	 * @var \phpbb\files\factory
+	 */
+	protected $files_factory;
+
+	/**
 	* Construct a driver object
 	*
 	* @param \phpbb\config\config $config phpBB configuration
 	* @param string $phpbb_root_path Path to the phpBB root
 	* @param string $php_ext PHP file extension
-	* @param \phpbb_path_helper $path_helper phpBB path helper
-	* @param \phpbb\mimetype\guesser $mimetype_guesser Mimetype guesser
+	* @param \phpbb\filesystem\filesystem_interface $filesystem phpBB filesystem helper
+	* @param \phpbb\path_helper $path_helper phpBB path helper
 	* @param \phpbb\event\dispatcher_interface $dispatcher phpBB Event dispatcher object
+	* @param \phpbb\files\factory $files_factory File classes factory
 	* @param \phpbb\cache\driver\driver_interface $cache Cache driver
 	*/
-	public function __construct(\phpbb\config\config $config, $phpbb_root_path, $php_ext, \phpbb\path_helper $path_helper, \phpbb\mimetype\guesser $mimetype_guesser, \phpbb\event\dispatcher_interface $dispatcher, \phpbb\cache\driver\driver_interface $cache = null)
+	public function __construct(\phpbb\config\config $config, $phpbb_root_path, $php_ext, \phpbb\filesystem\filesystem_interface $filesystem, \phpbb\path_helper $path_helper, \phpbb\event\dispatcher_interface $dispatcher, \phpbb\files\factory $files_factory, \phpbb\cache\driver\driver_interface $cache = null)
 	{
 		$this->config = $config;
 		$this->phpbb_root_path = $phpbb_root_path;
 		$this->php_ext = $php_ext;
+		$this->filesystem = $filesystem;
 		$this->path_helper = $path_helper;
-		$this->mimetype_guesser = $mimetype_guesser;
 		$this->dispatcher = $dispatcher;
+		$this->files_factory = $files_factory;
 		$this->cache = $cache;
 	}
 
@@ -92,19 +99,24 @@ class upload extends \phpbb\avatar\driver\driver
 			return false;
 		}
 
-		if (!class_exists('fileupload'))
-		{
-			include($this->phpbb_root_path . 'includes/functions_upload.' . $this->php_ext);
-		}
-
-		$upload = new \fileupload('AVATAR_', $this->allowed_extensions, $this->config['avatar_filesize'], $this->config['avatar_min_width'], $this->config['avatar_min_height'], $this->config['avatar_max_width'], $this->config['avatar_max_height'], (isset($this->config['mime_triggers']) ? explode('|', $this->config['mime_triggers']) : false));
+		/** @var \phpbb\files\upload $upload */
+		$upload = $this->files_factory->get('upload')
+			->set_error_prefix('AVATAR_')
+			->set_allowed_extensions($this->allowed_extensions)
+			->set_max_filesize($this->config['avatar_filesize'])
+			->set_allowed_dimensions(
+				$this->config['avatar_min_width'],
+				$this->config['avatar_min_height'],
+				$this->config['avatar_max_width'],
+				$this->config['avatar_max_height'])
+			->set_disallowed_content((isset($this->config['mime_triggers']) ? explode('|', $this->config['mime_triggers']) : false));
 
 		$url = $request->variable('avatar_upload_url', '');
 		$upload_file = $request->file('avatar_upload_file');
 
 		if (!empty($upload_file['name']))
 		{
-			$file = $upload->form_upload('avatar_upload_file', $this->mimetype_guesser);
+			$file = $upload->handle_upload('files.types.form', 'avatar_upload_file');
 		}
 		else if (!empty($this->config['allow_avatar_remote_upload']) && !empty($url))
 		{
@@ -136,7 +148,8 @@ class upload extends \phpbb\avatar\driver\driver
 
 			// Do not allow specifying the port (see RFC 3986) or IP addresses
 			// remote_upload() will do its own check for allowed filetypes
-			if (preg_match('@^(http|https|ftp)://[^/:?#]+:[0-9]+[/:?#]@i', $url) ||
+			if (!preg_match('#^(http|https|ftp)://(?:(.*?\.)*?[a-z0-9\-]+?\.[a-z]{2,4}|(?:\d{1,3}\.){3,5}\d{1,3}):?([0-9]*?).*?\.('. implode('|', $this->allowed_extensions) . ')$#i', $url) ||
+				preg_match('@^(http|https|ftp)://[^/:?#]+:[0-9]+[/:?#]@i', $url) ||
 				preg_match('#^(http|https|ftp)://(?:(?:\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.){3}(?:\d{1,2}|1\d\d|2[0-4]\d|25[0-5])#i', $url) ||
 				preg_match('#^(http|https|ftp)://(?:(?:(?:[\dA-F]{1,4}:){6}(?:[\dA-F]{1,4}:[\dA-F]{1,4}|(?:(?:\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.){3}(?:\d{1,2}|1\d\d|2[0-4]\d|25[0-5])))|(?:::(?:[\dA-F]{1,4}:){0,5}(?:[\dA-F]{1,4}(?::[\dA-F]{1,4})?|(?:(?:\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.){3}(?:\d{1,2}|1\d\d|2[0-4]\d|25[0-5])))|(?:(?:[\dA-F]{1,4}:):(?:[\dA-F]{1,4}:){4}(?:[\dA-F]{1,4}:[\dA-F]{1,4}|(?:(?:\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.){3}(?:\d{1,2}|1\d\d|2[0-4]\d|25[0-5])))|(?:(?:[\dA-F]{1,4}:){1,2}:(?:[\dA-F]{1,4}:){3}(?:[\dA-F]{1,4}:[\dA-F]{1,4}|(?:(?:\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.){3}(?:\d{1,2}|1\d\d|2[0-4]\d|25[0-5])))|(?:(?:[\dA-F]{1,4}:){1,3}:(?:[\dA-F]{1,4}:){2}(?:[\dA-F]{1,4}:[\dA-F]{1,4}|(?:(?:\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.){3}(?:\d{1,2}|1\d\d|2[0-4]\d|25[0-5])))|(?:(?:[\dA-F]{1,4}:){1,4}:(?:[\dA-F]{1,4}:)(?:[\dA-F]{1,4}:[\dA-F]{1,4}|(?:(?:\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.){3}(?:\d{1,2}|1\d\d|2[0-4]\d|25[0-5])))|(?:(?:[\dA-F]{1,4}:){1,5}:(?:[\dA-F]{1,4}:[\dA-F]{1,4}|(?:(?:\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.){3}(?:\d{1,2}|1\d\d|2[0-4]\d|25[0-5])))|(?:(?:[\dA-F]{1,4}:){1,6}:[\dA-F]{1,4})|(?:(?:[\dA-F]{1,4}:){1,7}:)|(?:::))#i', $url))
 			{
@@ -144,7 +157,7 @@ class upload extends \phpbb\avatar\driver\driver
 				return false;
 			}
 
-			$file = $upload->remote_upload($url, $this->mimetype_guesser);
+			$file = $upload->handle_upload('files.types.remote', $url);
 		}
 		else
 		{
@@ -155,7 +168,7 @@ class upload extends \phpbb\avatar\driver\driver
 		$file->clean_filename('avatar', $prefix, $row['id']);
 
 		// If there was an error during upload, then abort operation
-		if (sizeof($file->error))
+		if (count($file->error))
 		{
 			$file->remove();
 			$error = $file->error;
@@ -191,15 +204,18 @@ class upload extends \phpbb\avatar\driver\driver
 		*
 		* @event core.avatar_driver_upload_move_file_before
 		* @var	array	filedata			Array containing uploaded file data
+		* @var	\phpbb\files\filespec file	Instance of filespec class
 		* @var	string	destination			Destination directory where the file is going to be moved
 		* @var	string	prefix				Prefix for the avatar filename
 		* @var	array	row					Array with avatar row data
 		* @var	array	error				Array of errors, if filled in by this event file will not be moved
 		* @since 3.1.6-RC1
 		* @changed 3.1.9-RC1 Added filedata
+		* @changed 3.2.3-RC1 Added file
 		*/
 		$vars = array(
 			'filedata',
+			'file',
 			'destination',
 			'prefix',
 			'row',
@@ -209,7 +225,7 @@ class upload extends \phpbb\avatar\driver\driver
 
 		unset($filedata);
 
-		if (!sizeof($error))
+		if (!count($error))
 		{
 			// Move file and overwrite any existing image
 			$file->move_file($destination, true);
@@ -217,7 +233,7 @@ class upload extends \phpbb\avatar\driver\driver
 
 		// If there was an error during move, then clean up leftovers
 		$error = array_merge($error, $file->error);
-		if (sizeof($error))
+		if (count($error))
 		{
 			$file->remove();
 			return false;
@@ -279,12 +295,20 @@ class upload extends \phpbb\avatar\driver\driver
 		);
 		extract($this->dispatcher->trigger_event('core.avatar_driver_upload_delete_before', compact($vars)));
 
-		if (!sizeof($error) && file_exists($filename))
+		if (!count($error) && $this->filesystem->exists($filename))
 		{
-			@unlink($filename);
+			try
+			{
+				$this->filesystem->remove($filename);
+				return true;
+			}
+			catch (\phpbb\filesystem\exception\filesystem_exception $e)
+			{
+				// Fail is covered by return statement below
+			}
 		}
 
-		return true;
+		return false;
 	}
 
 	/**
@@ -302,6 +326,6 @@ class upload extends \phpbb\avatar\driver\driver
 	*/
 	protected function can_upload()
 	{
-		return (file_exists($this->phpbb_root_path . $this->config['avatar_path']) && phpbb_is_writable($this->phpbb_root_path . $this->config['avatar_path']) && (@ini_get('file_uploads') || strtolower(@ini_get('file_uploads')) == 'on'));
+		return ($this->filesystem->exists($this->phpbb_root_path . $this->config['avatar_path']) && $this->filesystem->is_writable($this->phpbb_root_path . $this->config['avatar_path']) && (@ini_get('file_uploads') || strtolower(@ini_get('file_uploads')) == 'on'));
 	}
 }
diff --git a/phpBB/phpbb/avatar/manager.php b/phpBB/phpbb/avatar/manager.php
index 26eb17c265..a909a91042 100644
--- a/phpBB/phpbb/avatar/manager.php
+++ b/phpBB/phpbb/avatar/manager.php
@@ -22,6 +22,12 @@ class manager
 	protected $config;
 
 	/**
+	* phpBB event dispatcher
+	* @var \phpbb\event\dispatcher_interface
+	*/
+	protected $phpbb_dispatcher;
+
+	/**
 	* Array that contains a list of enabled drivers
 	* @var array
 	*/
@@ -49,11 +55,13 @@ class manager
 	* Construct an avatar manager object
 	*
 	* @param \phpbb\config\config $config phpBB configuration
+	* @param \phpbb\event\dispatcher_interface $phpbb_dispatcher phpBB event dispatcher
 	* @param array $avatar_drivers Avatar drivers passed via the service container
 	*/
-	public function __construct(\phpbb\config\config $config, $avatar_drivers)
+	public function __construct(\phpbb\config\config $config, \phpbb\event\dispatcher_interface $phpbb_dispatcher, $avatar_drivers)
 	{
 		$this->config = $config;
+		$this->phpbb_dispatcher = $phpbb_dispatcher;
 		$this->register_avatar_drivers($avatar_drivers);
 	}
 
@@ -263,7 +271,7 @@ class manager
 		$config_name = $driver->get_config_name();
 
 		return array(
-			'allow_avatar_' . $config_name	=> array('lang' => 'ALLOW_' . strtoupper(str_replace('\\', '_', $config_name)),		'validate' => 'bool',	'type' => 'radio:yes_no', 'explain' => false),
+			'allow_avatar_' . $config_name	=> array('lang' => 'ALLOW_' . strtoupper(str_replace('\\', '_', $config_name)),		'validate' => 'bool',	'type' => 'radio:yes_no', 'explain' => true),
 		);
 	}
 
@@ -331,6 +339,19 @@ class manager
 				WHERE user_avatar = '" . $db->sql_escape($avatar_data['avatar']) . "'";
 			$db->sql_query($sql);
 		}
+
+		/**
+		* Event is triggered after user avatar has been deleted
+		*
+		* @event core.avatar_manager_avatar_delete_after
+		* @var	\phpbb\user	user		phpBB user object
+		* @var	array		avatar_data	Normalised avatar-related user data
+		* @var	string		table		Table to delete avatar from
+		* @var	string		prefix		Column prefix to delete avatar from
+		* @since 3.2.4-RC1
+		*/
+		$vars = array('user', 'avatar_data', 'table', 'prefix');
+		extract($this->phpbb_dispatcher->trigger_event('core.avatar_manager_avatar_delete_after', compact($vars)));
 	}
 
 	/**
diff --git a/phpBB/phpbb/cache/driver/apcu.php b/phpBB/phpbb/cache/driver/apcu.php
new file mode 100644
index 0000000000..c96cf0de57
--- /dev/null
+++ b/phpBB/phpbb/cache/driver/apcu.php
@@ -0,0 +1,74 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\cache\driver;
+
+/**
+* ACM for APCU
+*/
+class apcu extends \phpbb\cache\driver\memory
+{
+	var $extension = 'apcu';
+
+	/**
+	* {@inheritDoc}
+	*/
+	function purge()
+	{
+		/*
+		* Use an iterator to selectively delete our cache entries without disturbing
+		* any other cache users (e.g. other phpBB boards hosted on this server)
+		*/
+		apcu_delete(new \APCUIterator('#^' . $this->key_prefix . '#'));
+
+		parent::purge();
+	}
+
+	/**
+	* Fetch an item from the cache
+	*
+	* @access protected
+	* @param string $var Cache key
+	* @return mixed Cached data
+	*/
+	function _read($var)
+	{
+		return apcu_fetch($this->key_prefix . $var);
+	}
+
+	/**
+	* Store data in the cache
+	*
+	* @access protected
+	* @param string $var Cache key
+	* @param mixed $data Data to store
+	* @param int $ttl Time-to-live of cached data
+	* @return bool True if the operation succeeded
+	*/
+	function _write($var, $data, $ttl = 2592000)
+	{
+		return apcu_store($this->key_prefix . $var, $data, $ttl);
+	}
+
+	/**
+	* Remove an item from the cache
+	*
+	* @access protected
+	* @param string $var Cache key
+	* @return bool True if the operation succeeded
+	*/
+	function _delete($var)
+	{
+		return apcu_delete($this->key_prefix . $var);
+	}
+}
diff --git a/phpBB/phpbb/cache/driver/base.php b/phpBB/phpbb/cache/driver/base.php
index 53c50eeda3..3eca521148 100644
--- a/phpBB/phpbb/cache/driver/base.php
+++ b/phpBB/phpbb/cache/driver/base.php
@@ -49,7 +49,9 @@ abstract class base implements \phpbb\cache\driver\driver_interface
 				$this->remove_dir($fileInfo->getPathname());
 			}
 			else if (strpos($filename, 'container_') === 0 ||
+				strpos($filename, 'autoload_') === 0 ||
 				strpos($filename, 'url_matcher') === 0 ||
+				strpos($filename, 'url_generator') === 0 ||
 				strpos($filename, 'sql_') === 0 ||
 				strpos($filename, 'data_') === 0)
 			{
@@ -95,14 +97,14 @@ abstract class base implements \phpbb\cache\driver\driver_interface
 	{
 		// Remove extra spaces and tabs
 		$query = preg_replace('/[\n\r\s\t]+/', ' ', $query);
+		$query_id = md5($query);
 
-		if (($rowset = $this->_read('sql_' . md5($query))) === false)
+		if (($result = $this->_read('sql_' . $query_id)) === false)
 		{
 			return false;
 		}
 
-		$query_id = sizeof($this->sql_rowset);
-		$this->sql_rowset[$query_id] = $rowset;
+		$this->sql_rowset[$query_id] = $result;
 		$this->sql_row_pointer[$query_id] = 0;
 
 		return $query_id;
@@ -121,7 +123,7 @@ abstract class base implements \phpbb\cache\driver\driver_interface
 	*/
 	function sql_fetchrow($query_id)
 	{
-		if ($this->sql_row_pointer[$query_id] < sizeof($this->sql_rowset[$query_id]))
+		if ($this->sql_row_pointer[$query_id] < count($this->sql_rowset[$query_id]))
 		{
 			return $this->sql_rowset[$query_id][$this->sql_row_pointer[$query_id]++];
 		}
@@ -134,7 +136,7 @@ abstract class base implements \phpbb\cache\driver\driver_interface
 	*/
 	function sql_fetchfield($query_id, $field)
 	{
-		if ($this->sql_row_pointer[$query_id] < sizeof($this->sql_rowset[$query_id]))
+		if ($this->sql_row_pointer[$query_id] < count($this->sql_rowset[$query_id]))
 		{
 			return (isset($this->sql_rowset[$query_id][$this->sql_row_pointer[$query_id]][$field])) ? $this->sql_rowset[$query_id][$this->sql_row_pointer[$query_id]++][$field] : false;
 		}
@@ -147,7 +149,7 @@ abstract class base implements \phpbb\cache\driver\driver_interface
 	*/
 	function sql_rowseek($rownum, $query_id)
 	{
-		if ($rownum >= sizeof($this->sql_rowset[$query_id]))
+		if ($rownum >= count($this->sql_rowset[$query_id]))
 		{
 			return false;
 		}
@@ -181,13 +183,9 @@ abstract class base implements \phpbb\cache\driver\driver_interface
 	*/
 	function remove_file($filename, $check = false)
 	{
-		if (!function_exists('phpbb_is_writable'))
-		{
-			global $phpbb_root_path, $phpEx;
-			include($phpbb_root_path . 'includes/functions.' . $phpEx);
-		}
+		global $phpbb_filesystem;
 
-		if ($check && !phpbb_is_writable($this->cache_dir))
+		if ($check && !$phpbb_filesystem->is_writable($this->cache_dir))
 		{
 			// E_USER_ERROR - not using language entry - intended.
 			trigger_error('Unable to remove files within ' . $this->cache_dir . '. Please check directory permissions.', E_USER_ERROR);
diff --git a/phpBB/phpbb/cache/driver/null.php b/phpBB/phpbb/cache/driver/dummy.php
index a45cf97862..1f74f6dd77 100644
--- a/phpBB/phpbb/cache/driver/null.php
+++ b/phpBB/phpbb/cache/driver/dummy.php
@@ -14,9 +14,9 @@
 namespace phpbb\cache\driver;
 
 /**
-* ACM Null Caching
+* ACM dummy Caching
 */
-class null extends \phpbb\cache\driver\base
+class dummy extends \phpbb\cache\driver\base
 {
 	/**
 	* Set cache path
@@ -52,8 +52,10 @@ class null extends \phpbb\cache\driver\base
 	*/
 	function tidy()
 	{
+		global $config;
+
 		// This cache always has a tidy room.
-		set_config('cache_last_gc', time(), true);
+		$config->set('cache_last_gc', time(), false);
 	}
 
 	/**
diff --git a/phpBB/phpbb/cache/driver/eaccelerator.php b/phpBB/phpbb/cache/driver/eaccelerator.php
index 1697758acc..740855144f 100644
--- a/phpBB/phpbb/cache/driver/eaccelerator.php
+++ b/phpBB/phpbb/cache/driver/eaccelerator.php
@@ -44,9 +44,11 @@ class eaccelerator extends \phpbb\cache\driver\memory
 	*/
 	function tidy()
 	{
+		global $config;
+
 		eaccelerator_gc();
 
-		set_config('cache_last_gc', time(), true);
+		$config->set('cache_last_gc', time(), false);
 	}
 
 	/**
diff --git a/phpBB/phpbb/cache/driver/file.php b/phpBB/phpbb/cache/driver/file.php
index 1e9ee960dc..de6f444251 100644
--- a/phpBB/phpbb/cache/driver/file.php
+++ b/phpBB/phpbb/cache/driver/file.php
@@ -21,14 +21,26 @@ class file extends \phpbb\cache\driver\base
 	var $var_expires = array();
 
 	/**
+	 * @var	\phpbb\filesystem\filesystem_interface
+	 */
+	protected $filesystem;
+
+	/**
 	* Set cache path
 	*
 	* @param string $cache_dir Define the path to the cache directory (default: $phpbb_root_path . 'cache/')
 	*/
 	function __construct($cache_dir = null)
 	{
-		global $phpbb_root_path;
-		$this->cache_dir = !is_null($cache_dir) ? $cache_dir : $phpbb_root_path . 'cache/';
+		global $phpbb_container;
+
+		$this->cache_dir = !is_null($cache_dir) ? $cache_dir : $phpbb_container->getParameter('core.cache_dir');
+		$this->filesystem = new \phpbb\filesystem\filesystem();
+
+		if (!is_dir($this->cache_dir))
+		{
+			@mkdir($this->cache_dir, 0777, true);
+		}
 	}
 
 	/**
@@ -63,14 +75,8 @@ class file extends \phpbb\cache\driver\base
 
 		if (!$this->_write('data_global'))
 		{
-			if (!function_exists('phpbb_is_writable'))
-			{
-				global $phpbb_root_path;
-				include($phpbb_root_path . 'includes/functions.' . $phpEx);
-			}
-
 			// Now, this occurred how often? ... phew, just tell the user then...
-			if (!phpbb_is_writable($this->cache_dir))
+			if (!$this->filesystem->is_writable($this->cache_dir))
 			{
 				// We need to use die() here, because else we may encounter an infinite loop (the message handler calls $cache->unload())
 				die('Fatal: ' . $this->cache_dir . ' is NOT writable.');
@@ -89,7 +95,7 @@ class file extends \phpbb\cache\driver\base
 	*/
 	function tidy()
 	{
-		global $phpEx;
+		global $config, $phpEx;
 
 		$dir = @opendir($this->cache_dir);
 
@@ -129,7 +135,7 @@ class file extends \phpbb\cache\driver\base
 
 		if (file_exists($this->cache_dir . 'data_global.' . $phpEx))
 		{
-			if (!sizeof($this->vars))
+			if (!count($this->vars))
 			{
 				$this->load();
 			}
@@ -143,7 +149,7 @@ class file extends \phpbb\cache\driver\base
 			}
 		}
 
-		set_config('cache_last_gc', time(), true);
+		$config->set('cache_last_gc', time(), false);
 	}
 
 	/**
@@ -284,7 +290,7 @@ class file extends \phpbb\cache\driver\base
 		}
 		else
 		{
-			if (!sizeof($this->vars))
+			if (!count($this->vars))
 			{
 				$this->load();
 			}
@@ -306,7 +312,7 @@ class file extends \phpbb\cache\driver\base
 		// Remove extra spaces and tabs
 		$query = preg_replace('/[\n\r\s\t]+/', ' ', $query);
 
-		$query_id = sizeof($this->sql_rowset);
+		$query_id = md5($query);
 		$this->sql_rowset[$query_id] = array();
 		$this->sql_row_pointer[$query_id] = 0;
 
@@ -316,7 +322,7 @@ class file extends \phpbb\cache\driver\base
 		}
 		$db->sql_freeresult($query_result);
 
-		if ($this->_write('sql_' . md5($query), $this->sql_rowset[$query_id], $ttl + time(), $query))
+		if ($this->_write('sql_' . $query_id, $this->sql_rowset[$query_id], $ttl + time(), $query))
 		{
 			return $query_id;
 		}
@@ -573,13 +579,14 @@ class file extends \phpbb\cache\driver\base
 				@opcache_invalidate($file);
 			}
 
-			if (!function_exists('phpbb_chmod'))
+			try
 			{
-				global $phpbb_root_path;
-				include($phpbb_root_path . 'includes/functions.' . $phpEx);
+				$this->filesystem->phpbb_chmod($file, CHMOD_READ | CHMOD_WRITE);
+			}
+			catch (\phpbb\filesystem\exception\filesystem_exception $e)
+			{
+				// Do nothing
 			}
-
-			phpbb_chmod($file, CHMOD_READ | CHMOD_WRITE);
 
 			$return_value = true;
 		}
diff --git a/phpBB/phpbb/cache/driver/memcached.php b/phpBB/phpbb/cache/driver/memcached.php
index a7da22d7e8..7d66759ec2 100644
--- a/phpBB/phpbb/cache/driver/memcached.php
+++ b/phpBB/phpbb/cache/driver/memcached.php
@@ -65,10 +65,10 @@ class memcached extends \phpbb\cache\driver\memory
 			$this->memcached->setOption(\Memcached::OPT_COMPRESSION, false);
 		}
 
-		foreach (explode(',', PHPBB_ACM_MEMCACHE) as $u)
+		foreach (explode(',', PHPBB_ACM_MEMCACHED) as $u)
 		{
 			preg_match('#(.*)/(\d+)#', $u, $parts);
-			$this->memcache->addServer(trim($parts[1]), (int) trim($parts[2]));
+			$this->memcached->addServer(trim($parts[1]), (int) trim($parts[2]));
 		}
 	}
 
diff --git a/phpBB/phpbb/cache/driver/memory.php b/phpBB/phpbb/cache/driver/memory.php
index 0b0e323e3d..eba9549877 100644
--- a/phpBB/phpbb/cache/driver/memory.php
+++ b/phpBB/phpbb/cache/driver/memory.php
@@ -25,9 +25,9 @@ abstract class memory extends \phpbb\cache\driver\base
 	*/
 	function __construct()
 	{
-		global $phpbb_root_path, $dbname, $table_prefix;
+		global $phpbb_root_path, $dbname, $table_prefix, $phpbb_container;
 
-		$this->cache_dir	= $phpbb_root_path . 'cache/';
+		$this->cache_dir	= $phpbb_container->getParameter('core.cache_dir');
 		$this->key_prefix	= substr(md5($dbname . $table_prefix), 0, 8) . '_';
 
 		if (!isset($this->extension) || !extension_loaded($this->extension))
@@ -51,10 +51,11 @@ abstract class memory extends \phpbb\cache\driver\base
 	function load()
 	{
 		// grab the global cache
-		$this->vars = $this->_read('global');
+		$data = $this->_read('global');
 
-		if ($this->vars !== false)
+		if ($data !== false)
 		{
+			$this->vars = $data;
 			return true;
 		}
 
@@ -81,9 +82,10 @@ abstract class memory extends \phpbb\cache\driver\base
 	*/
 	function tidy()
 	{
-		// cache has auto GC, no need to have any code here :)
+		global $config;
 
-		set_config('cache_last_gc', time(), true);
+		// cache has auto GC, no need to have any code here :)
+		$config->set('cache_last_gc', time(), false);
 	}
 
 	/**
@@ -187,7 +189,7 @@ abstract class memory extends \phpbb\cache\driver\base
 		}
 		else
 		{
-			if (!sizeof($this->vars))
+			if (!count($this->vars))
 			{
 				$this->load();
 			}
@@ -203,7 +205,7 @@ abstract class memory extends \phpbb\cache\driver\base
 	{
 		// Remove extra spaces and tabs
 		$query = preg_replace('/[\n\r\s\t]+/', ' ', $query);
-		$hash = md5($query);
+		$query_id = md5($query);
 
 		// determine which tables this query belongs to
 		// Some queries use backticks, namely the get_database_size() query
@@ -244,14 +246,13 @@ abstract class memory extends \phpbb\cache\driver\base
 				$temp = array();
 			}
 
-			$temp[$hash] = true;
+			$temp[$query_id] = true;
 
 			// This must never expire
 			$this->_write('sql_' . $table_name, $temp, 0);
 		}
 
 		// store them in the right place
-		$query_id = sizeof($this->sql_rowset);
 		$this->sql_rowset[$query_id] = array();
 		$this->sql_row_pointer[$query_id] = 0;
 
@@ -261,7 +262,7 @@ abstract class memory extends \phpbb\cache\driver\base
 		}
 		$db->sql_freeresult($query_result);
 
-		$this->_write('sql_' . $hash, $this->sql_rowset[$query_id], $ttl);
+		$this->_write('sql_' . $query_id, $this->sql_rowset[$query_id], $ttl);
 
 		return $query_id;
 	}
diff --git a/phpBB/phpbb/cache/driver/redis.php b/phpBB/phpbb/cache/driver/redis.php
index eda774491c..eaeb529918 100644
--- a/phpBB/phpbb/cache/driver/redis.php
+++ b/phpBB/phpbb/cache/driver/redis.php
@@ -137,6 +137,10 @@ class redis extends \phpbb\cache\driver\memory
 	*/
 	function _write($var, $data, $ttl = 2592000)
 	{
+		if ($ttl == 0)
+		{
+			return $this->redis->set($var, $data);
+		}
 		return $this->redis->setex($var, $ttl, $data);
 	}
 
diff --git a/phpBB/phpbb/cache/service.php b/phpBB/phpbb/cache/service.php
index 56727c2ad5..502ae27625 100644
--- a/phpBB/phpbb/cache/service.php
+++ b/phpBB/phpbb/cache/service.php
@@ -141,6 +141,7 @@ class service
 				$icons[$row['icons_id']]['img'] = $row['icons_url'];
 				$icons[$row['icons_id']]['width'] = (int) $row['icons_width'];
 				$icons[$row['icons_id']]['height'] = (int) $row['icons_height'];
+				$icons[$row['icons_id']]['alt'] = ($row['icons_alt']) ? $row['icons_alt'] : '';
 				$icons[$row['icons_id']]['display'] = (bool) $row['display_on_posting'];
 			}
 			$this->db->sql_freeresult($result);
@@ -226,7 +227,7 @@ class service
 				// Store allowed extensions forum wise
 				if ($row['allow_group'])
 				{
-					$extensions['_allowed_post'][$extension] = (!sizeof($allowed_forums)) ? 0 : $allowed_forums;
+					$extensions['_allowed_post'][$extension] = (!count($allowed_forums)) ? 0 : $allowed_forums;
 				}
 
 				if ($row['allow_in_pm'])
@@ -301,7 +302,6 @@ class service
 		{
 			switch ($this->db->get_sql_layer())
 			{
-				case 'mssql':
 				case 'mssql_odbc':
 				case 'mssqlnative':
 					$sql = 'SELECT user_id, bot_agent, bot_ip
diff --git a/phpBB/phpbb/captcha/char_cube3d.php b/phpBB/phpbb/captcha/char_cube3d.php
index a712b16dce..0255259ac4 100644
--- a/phpBB/phpbb/captcha/char_cube3d.php
+++ b/phpBB/phpbb/captcha/char_cube3d.php
@@ -220,7 +220,7 @@ class char_cube3d
 	*/
 	function scale($vector, $length)
 	{
-		if (sizeof($vector) == 2)
+		if (count($vector) == 2)
 		{
 			return array($vector[0] * $length, $vector[1] * $length);
 		}
diff --git a/phpBB/phpbb/captcha/colour_manager.php b/phpBB/phpbb/captcha/colour_manager.php
index 6ca3c3fd2c..82332da810 100644
--- a/phpBB/phpbb/captcha/colour_manager.php
+++ b/phpBB/phpbb/captcha/colour_manager.php
@@ -256,7 +256,7 @@ class colour_manager
 		if (is_array($resource))
 		{
 			$results = array();
-			for ($i = 0, $size = sizeof($resource); $i < $size; ++$i)
+			for ($i = 0, $size = count($resource); $i < $size; ++$i)
 			{
 				$results = array_merge($results, $this->mono_range($resource[$i], $count, $include_original));
 			}
diff --git a/phpBB/phpbb/captcha/gd.php b/phpBB/phpbb/captcha/gd.php
index 652df28f8a..91b2f89d81 100644
--- a/phpBB/phpbb/captcha/gd.php
+++ b/phpBB/phpbb/captcha/gd.php
@@ -97,13 +97,12 @@ class gd
 
 		if ($config['captcha_gd_3d_noise'])
 		{
-			$xoffset = mt_rand(0,9);
 			$noise_bitmaps = $this->captcha_noise_bg_bitmaps();
 			for ($i = 0; $i < $code_len; ++$i)
 			{
-				$noise[$i] = new char_cube3d($noise_bitmaps, mt_rand(1, sizeof($noise_bitmaps['data'])));
+				$noise[$i] = new char_cube3d($noise_bitmaps, mt_rand(1, count($noise_bitmaps['data'])));
 
-				list($min, $max) = $noise[$i]->range();
+				$noise[$i]->range();
 				//$box = $noise[$i]->dimensions($sizes[$i]);
 			}
 			$xoffset = 0;
@@ -151,8 +150,6 @@ class gd
 	*/
 	function wave($img)
 	{
-		global $config;
-
 		$period_x = mt_rand(12,18);
 		$period_y = mt_rand(7,14);
 		$amp_x = mt_rand(5,10);
@@ -1661,32 +1658,32 @@ class gd
 			'height'	=> 15,
 			'data'		=> array(
 
-			'A' =>	$chars['A'][mt_rand(0, min(sizeof($chars['A']), $config['captcha_gd_fonts']) -1)],
-			'B' =>	$chars['B'][mt_rand(0, min(sizeof($chars['B']), $config['captcha_gd_fonts']) -1)],
-			'C' =>	$chars['C'][mt_rand(0, min(sizeof($chars['C']), $config['captcha_gd_fonts']) -1)],
-			'D' =>	$chars['D'][mt_rand(0, min(sizeof($chars['D']), $config['captcha_gd_fonts']) -1)],
-			'E' =>	$chars['E'][mt_rand(0, min(sizeof($chars['E']), $config['captcha_gd_fonts']) -1)],
-			'F' =>	$chars['F'][mt_rand(0, min(sizeof($chars['F']), $config['captcha_gd_fonts']) -1)],
-			'G' =>	$chars['G'][mt_rand(0, min(sizeof($chars['G']), $config['captcha_gd_fonts']) -1)],
-			'H' =>	$chars['H'][mt_rand(0, min(sizeof($chars['H']), $config['captcha_gd_fonts']) -1)],
-			'I' =>	$chars['I'][mt_rand(0, min(sizeof($chars['I']), $config['captcha_gd_fonts']) -1)],
-			'J' =>	$chars['J'][mt_rand(0, min(sizeof($chars['J']), $config['captcha_gd_fonts']) -1)],
-			'K' =>	$chars['K'][mt_rand(0, min(sizeof($chars['K']), $config['captcha_gd_fonts']) -1)],
-			'L' =>	$chars['L'][mt_rand(0, min(sizeof($chars['L']), $config['captcha_gd_fonts']) -1)],
-			'M' =>	$chars['M'][mt_rand(0, min(sizeof($chars['M']), $config['captcha_gd_fonts']) -1)],
-			'N' =>	$chars['N'][mt_rand(0, min(sizeof($chars['N']), $config['captcha_gd_fonts']) -1)],
-			'O' =>	$chars['O'][mt_rand(0, min(sizeof($chars['O']), $config['captcha_gd_fonts']) -1)],
-			'P' =>	$chars['P'][mt_rand(0, min(sizeof($chars['P']), $config['captcha_gd_fonts']) -1)],
-			'Q' =>	$chars['Q'][mt_rand(0, min(sizeof($chars['Q']), $config['captcha_gd_fonts']) -1)],
-			'R' =>	$chars['R'][mt_rand(0, min(sizeof($chars['R']), $config['captcha_gd_fonts']) -1)],
-			'S' =>	$chars['S'][mt_rand(0, min(sizeof($chars['S']), $config['captcha_gd_fonts']) -1)],
-			'T' =>	$chars['T'][mt_rand(0, min(sizeof($chars['T']), $config['captcha_gd_fonts']) -1)],
-			'U' =>	$chars['U'][mt_rand(0, min(sizeof($chars['U']), $config['captcha_gd_fonts']) -1)],
-			'V' =>	$chars['V'][mt_rand(0, min(sizeof($chars['V']), $config['captcha_gd_fonts']) -1)],
-			'W' =>	$chars['W'][mt_rand(0, min(sizeof($chars['W']), $config['captcha_gd_fonts']) -1)],
-			'X' =>	$chars['X'][mt_rand(0, min(sizeof($chars['X']), $config['captcha_gd_fonts']) -1)],
-			'Y' =>	$chars['Y'][mt_rand(0, min(sizeof($chars['Y']), $config['captcha_gd_fonts']) -1)],
-			'Z' =>	$chars['Z'][mt_rand(0, min(sizeof($chars['Z']), $config['captcha_gd_fonts']) -1)],
+			'A' =>	$chars['A'][mt_rand(0, min(count($chars['A']), $config['captcha_gd_fonts']) -1)],
+			'B' =>	$chars['B'][mt_rand(0, min(count($chars['B']), $config['captcha_gd_fonts']) -1)],
+			'C' =>	$chars['C'][mt_rand(0, min(count($chars['C']), $config['captcha_gd_fonts']) -1)],
+			'D' =>	$chars['D'][mt_rand(0, min(count($chars['D']), $config['captcha_gd_fonts']) -1)],
+			'E' =>	$chars['E'][mt_rand(0, min(count($chars['E']), $config['captcha_gd_fonts']) -1)],
+			'F' =>	$chars['F'][mt_rand(0, min(count($chars['F']), $config['captcha_gd_fonts']) -1)],
+			'G' =>	$chars['G'][mt_rand(0, min(count($chars['G']), $config['captcha_gd_fonts']) -1)],
+			'H' =>	$chars['H'][mt_rand(0, min(count($chars['H']), $config['captcha_gd_fonts']) -1)],
+			'I' =>	$chars['I'][mt_rand(0, min(count($chars['I']), $config['captcha_gd_fonts']) -1)],
+			'J' =>	$chars['J'][mt_rand(0, min(count($chars['J']), $config['captcha_gd_fonts']) -1)],
+			'K' =>	$chars['K'][mt_rand(0, min(count($chars['K']), $config['captcha_gd_fonts']) -1)],
+			'L' =>	$chars['L'][mt_rand(0, min(count($chars['L']), $config['captcha_gd_fonts']) -1)],
+			'M' =>	$chars['M'][mt_rand(0, min(count($chars['M']), $config['captcha_gd_fonts']) -1)],
+			'N' =>	$chars['N'][mt_rand(0, min(count($chars['N']), $config['captcha_gd_fonts']) -1)],
+			'O' =>	$chars['O'][mt_rand(0, min(count($chars['O']), $config['captcha_gd_fonts']) -1)],
+			'P' =>	$chars['P'][mt_rand(0, min(count($chars['P']), $config['captcha_gd_fonts']) -1)],
+			'Q' =>	$chars['Q'][mt_rand(0, min(count($chars['Q']), $config['captcha_gd_fonts']) -1)],
+			'R' =>	$chars['R'][mt_rand(0, min(count($chars['R']), $config['captcha_gd_fonts']) -1)],
+			'S' =>	$chars['S'][mt_rand(0, min(count($chars['S']), $config['captcha_gd_fonts']) -1)],
+			'T' =>	$chars['T'][mt_rand(0, min(count($chars['T']), $config['captcha_gd_fonts']) -1)],
+			'U' =>	$chars['U'][mt_rand(0, min(count($chars['U']), $config['captcha_gd_fonts']) -1)],
+			'V' =>	$chars['V'][mt_rand(0, min(count($chars['V']), $config['captcha_gd_fonts']) -1)],
+			'W' =>	$chars['W'][mt_rand(0, min(count($chars['W']), $config['captcha_gd_fonts']) -1)],
+			'X' =>	$chars['X'][mt_rand(0, min(count($chars['X']), $config['captcha_gd_fonts']) -1)],
+			'Y' =>	$chars['Y'][mt_rand(0, min(count($chars['Y']), $config['captcha_gd_fonts']) -1)],
+			'Z' =>	$chars['Z'][mt_rand(0, min(count($chars['Z']), $config['captcha_gd_fonts']) -1)],
 
 			'1' => array(
 				array(0,0,0,1,1,0,0,0,0),
diff --git a/phpBB/phpbb/captcha/gd_wave.php b/phpBB/phpbb/captcha/gd_wave.php
index d48fc753a5..f2ec4137d2 100644
--- a/phpBB/phpbb/captcha/gd_wave.php
+++ b/phpBB/phpbb/captcha/gd_wave.php
@@ -23,8 +23,6 @@ class gd_wave
 
 	function execute($code, $seed)
 	{
-		global $starttime;
-
 		// seed the random generator
 		mt_srand($seed);
 
@@ -77,7 +75,6 @@ class gd_wave
 		// TODO
 		$background = imagecolorallocate($img, mt_rand(155, 255), mt_rand(155, 255), mt_rand(155, 255));
 		imagefill($img, 0, 0, $background);
-		$black = imagecolorallocate($img, 0, 0, 0);
 
 		$random = array();
 		$fontcolors = array();
@@ -155,7 +152,7 @@ class gd_wave
 		// rather than recalculating from absolute coordinates
 		// What we cache into the $img_buffer contains the raised text coordinates.
 		$img_pos_prev	= $img_buffer[0][0] = array($box['upper_left']['x'], $box['upper_left']['y']);
-		$cur_height		= $prev_height = $this->wave_height(0, 0, $subdivision_factor);
+		$prev_height = $this->wave_height(0, 0, $subdivision_factor);
 		$full_x			= $plane_x * $subdivision_factor;
 		$full_y			= $plane_y * $subdivision_factor;
 
diff --git a/phpBB/phpbb/captcha/plugins/captcha_abstract.php b/phpBB/phpbb/captcha/plugins/captcha_abstract.php
index 24ed7f939d..b508767d17 100644
--- a/phpBB/phpbb/captcha/plugins/captcha_abstract.php
+++ b/phpBB/phpbb/captcha/plugins/captcha_abstract.php
@@ -34,12 +34,12 @@ abstract class captcha_abstract
 
 	function init($type)
 	{
-		global $config, $db, $user;
+		global $config, $request;
 
 		// read input
-		$this->confirm_id = request_var('confirm_id', '');
-		$this->confirm_code = request_var('confirm_code', '');
-		$refresh = request_var('refresh_vc', false) && $config['confirm_refresh'];
+		$this->confirm_id = $request->variable('confirm_id', '');
+		$this->confirm_code = $request->variable('confirm_code', '');
+		$refresh = $request->variable('refresh_vc', false) && $config['confirm_refresh'];
 
 		$this->type = (int) $type;
 
@@ -56,8 +56,6 @@ abstract class captcha_abstract
 
 	function execute_demo()
 	{
-		global $user;
-
 		$this->code = gen_rand_string_friendly(mt_rand(CAPTCHA_MIN_CHARS, CAPTCHA_MAX_CHARS));
 		$this->seed = hexdec(substr(unique_id(), 4, 10));
 
@@ -117,7 +115,7 @@ abstract class captcha_abstract
 
 	function get_demo_template($id)
 	{
-		global $config, $user, $template, $phpbb_admin_path, $phpEx;
+		global $config, $template, $request, $phpbb_admin_path, $phpEx;
 
 		$variables = '';
 
@@ -125,7 +123,7 @@ abstract class captcha_abstract
 		{
 			foreach ($this->captcha_vars as $captcha_var => $template_var)
 			{
-				$variables .= '&amp;' . rawurlencode($captcha_var) . '=' . request_var($captcha_var, (int) $config[$captcha_var]);
+				$variables .= '&amp;' . rawurlencode($captcha_var) . '=' . $request->variable($captcha_var, (int) $config[$captcha_var]);
 			}
 		}
 
@@ -153,7 +151,7 @@ abstract class captcha_abstract
 
 	function garbage_collect($type)
 	{
-		global $db, $config;
+		global $db;
 
 		$sql = 'SELECT DISTINCT c.session_id
 			FROM ' . CONFIRM_TABLE . ' c
@@ -171,7 +169,7 @@ abstract class captcha_abstract
 			}
 			while ($row = $db->sql_fetchrow($result));
 
-			if (sizeof($sql_in))
+			if (count($sql_in))
 			{
 				$sql = 'DELETE FROM ' . CONFIRM_TABLE . '
 					WHERE ' . $db->sql_in_set('session_id', $sql_in);
@@ -193,9 +191,9 @@ abstract class captcha_abstract
 
 	function validate()
 	{
-		global $config, $db, $user;
+		global $user;
 
-		if (empty($user->lang))
+		if (!$user->is_setup())
 		{
 			$user->setup();
 		}
@@ -350,7 +348,9 @@ abstract class captcha_abstract
 
 	function is_solved()
 	{
-		if (request_var('confirm_code', false) && $this->solved === 0)
+		global $request;
+
+		if ($request->variable('confirm_code', false) && $this->solved === 0)
 		{
 			$this->validate();
 		}
diff --git a/phpBB/phpbb/captcha/plugins/gd.php b/phpBB/phpbb/captcha/plugins/gd.php
index f6200b5b2f..6d3c9bb3d2 100644
--- a/phpBB/phpbb/captcha/plugins/gd.php
+++ b/phpBB/phpbb/captcha/plugins/gd.php
@@ -51,40 +51,33 @@ class gd extends captcha_abstract
 		return 'CAPTCHA_GD';
 	}
 
-	function acp_page($id, &$module)
+	function acp_page($id, $module)
 	{
-		global $db, $user, $auth, $template;
-		global $config, $phpbb_root_path, $phpbb_admin_path, $phpEx;
+		global $user, $template, $phpbb_log, $request;
+		global $config;
 
 		$user->add_lang('acp/board');
 
-		$config_vars = array(
-			'enable_confirm'		=> 'REG_ENABLE',
-			'enable_post_confirm'	=> 'POST_ENABLE',
-			'confirm_refresh'		=> 'CONFIRM_REFRESH',
-			'captcha_gd'			=> 'CAPTCHA_GD',
-		);
-
 		$module->tpl_name = 'captcha_gd_acp';
 		$module->page_title = 'ACP_VC_SETTINGS';
 		$form_key = 'acp_captcha';
 		add_form_key($form_key);
 
-		$submit = request_var('submit', '');
+		$submit = $request->variable('submit', '');
 
 		if ($submit && check_form_key($form_key))
 		{
 			$captcha_vars = array_keys($this->captcha_vars);
 			foreach ($captcha_vars as $captcha_var)
 			{
-				$value = request_var($captcha_var, 0);
+				$value = $request->variable($captcha_var, 0);
 				if ($value >= 0)
 				{
-					set_config($captcha_var, $value);
+					$config->set($captcha_var, $value);
 				}
 			}
 
-			add_log('admin', 'LOG_CONFIG_VISUAL');
+			$phpbb_log->add('admin', $user->data['user_id'], $user->ip, 'LOG_CONFIG_VISUAL');
 			trigger_error($user->lang['CONFIG_UPDATED'] . adm_back_link($module->u_action));
 		}
 		else if ($submit)
@@ -95,7 +88,7 @@ class gd extends captcha_abstract
 		{
 			foreach ($this->captcha_vars as $captcha_var => $template_var)
 			{
-				$var = (isset($_REQUEST[$captcha_var])) ? request_var($captcha_var, 0) : $config[$captcha_var];
+				$var = (isset($_REQUEST[$captcha_var])) ? $request->variable($captcha_var, 0) : $config[$captcha_var];
 				$template->assign_var($template_var, $var);
 			}
 
@@ -109,7 +102,7 @@ class gd extends captcha_abstract
 
 	function execute_demo()
 	{
-		global $config;
+		global $config, $request;
 
 		$config_old = $config;
 
@@ -121,7 +114,7 @@ class gd extends captcha_abstract
 
 		foreach ($this->captcha_vars as $captcha_var => $template_var)
 		{
-			$config->set($captcha_var, request_var($captcha_var, (int) $config[$captcha_var]));
+			$config->set($captcha_var, $request->variable($captcha_var, (int) $config[$captcha_var]));
 		}
 		parent::execute_demo();
 		$config = $config_old;
diff --git a/phpBB/phpbb/captcha/plugins/gd_wave.php b/phpBB/phpbb/captcha/plugins/gd_wave.php
index e1d44df778..4ac26ed2b7 100644
--- a/phpBB/phpbb/captcha/plugins/gd_wave.php
+++ b/phpBB/phpbb/captcha/plugins/gd_wave.php
@@ -33,9 +33,9 @@ class gd_wave extends captcha_abstract
 		return '\\phpbb\\captcha\\gd_wave';
 	}
 
-	function acp_page($id, &$module)
+	function acp_page($id, $module)
 	{
-		global $config, $db, $template, $user;
+		global $user;
 
 		trigger_error($user->lang['CAPTCHA_NO_OPTIONS'] . adm_back_link($module->u_action));
 	}
diff --git a/phpBB/phpbb/captcha/plugins/nogd.php b/phpBB/phpbb/captcha/plugins/nogd.php
index 6845e5935c..da67cd2bf4 100644
--- a/phpBB/phpbb/captcha/plugins/nogd.php
+++ b/phpBB/phpbb/captcha/plugins/nogd.php
@@ -33,7 +33,7 @@ class nogd extends captcha_abstract
 		return '\\phpbb\\captcha\\non_gd';
 	}
 
-	function acp_page($id, &$module)
+	function acp_page($id, $module)
 	{
 		global $user;
 
diff --git a/phpBB/phpbb/captcha/plugins/qa.php b/phpBB/phpbb/captcha/plugins/qa.php
index a9d133d8f2..966b8d32f2 100644
--- a/phpBB/phpbb/captcha/plugins/qa.php
+++ b/phpBB/phpbb/captcha/plugins/qa.php
@@ -21,7 +21,7 @@ class qa
 {
 	var $confirm_id;
 	var $answer;
-	var $question_ids;
+	var $question_ids = [];
 	var $question_text;
 	var $question_lang;
 	var $question_strict;
@@ -58,14 +58,14 @@ class qa
 	*/
 	function init($type)
 	{
-		global $config, $db, $user;
+		global $config, $db, $user, $request;
 
 		// load our language file
 		$user->add_lang('captcha_qa');
 
 		// read input
-		$this->confirm_id = request_var('qa_confirm_id', '');
-		$this->answer = utf8_normalize_nfc(request_var('qa_answer', '', true));
+		$this->confirm_id = $request->variable('qa_confirm_id', '');
+		$this->answer = $request->variable('qa_answer', '', true);
 
 		$this->type = (int) $type;
 		$this->question_lang = $user->lang_name;
@@ -84,7 +84,7 @@ class qa
 		$db->sql_freeresult($result);
 
 		// fallback to the board default lang
-		if (!sizeof($this->question_ids))
+		if (!count($this->question_ids))
 		{
 			$this->question_lang = $config['default_lang'];
 
@@ -101,14 +101,13 @@ class qa
 		}
 
 		// final fallback to any language
-		if (!sizeof($this->question_ids))
+		if (!count($this->question_ids))
 		{
 			$this->question_lang = '';
 
 			$sql = 'SELECT q.question_id, q.lang_iso
 				FROM ' . $this->table_captcha_questions . ' q, ' . $this->table_captcha_answers . ' a
-				WHERE q.question_id = a.question_id
-				GROUP BY lang_iso';
+				WHERE q.question_id = a.question_id';
 			$result = $db->sql_query($sql, 7200);
 
 			while ($row = $db->sql_fetchrow($result))
@@ -135,9 +134,9 @@ class qa
 	*/
 	public function is_installed()
 	{
-		global $db;
+		global $phpbb_container;
 
-		$db_tool = new \phpbb\db\tools($db);
+		$db_tool = $phpbb_container->get('dbal.tools');
 
 		return $db_tool->sql_table_exists($this->table_captcha_questions);
 	}
@@ -311,7 +310,7 @@ class qa
 			}
 			while ($row = $db->sql_fetchrow($result));
 
-			if (sizeof($sql_in))
+			if (count($sql_in))
 			{
 				$sql = 'DELETE FROM ' . $this->table_qa_confirm . '
 					WHERE ' . $db->sql_in_set('confirm_id', $sql_in);
@@ -334,10 +333,9 @@ class qa
 	*/
 	function install()
 	{
-		global $db;
-
-		$db_tool = new \phpbb\db\tools($db);
+		global $phpbb_container;
 
+		$db_tool = $phpbb_container->get('dbal.tools');
 		$schemas = array(
 				$this->table_captcha_questions		=> array (
 					'COLUMNS' => array(
@@ -396,7 +394,7 @@ class qa
 
 		$error = '';
 
-		if (!sizeof($this->question_ids))
+		if (!count($this->question_ids))
 		{
 			/** @var \phpbb\log\log_interface $phpbb_log */
 			$phpbb_log->add('critical', $user->data['user_id'], $user->ip, 'LOG_ERROR_CAPTCHA', time(), array($user->lang('CONFIRM_QUESTION_MISSING')));
@@ -440,7 +438,7 @@ class qa
 	{
 		global $db, $user;
 
-		if (!sizeof($this->question_ids))
+		if (!count($this->question_ids))
 		{
 			return;
 		}
@@ -466,7 +464,7 @@ class qa
 	{
 		global $db, $user;
 
-		if (!sizeof($this->question_ids))
+		if (!count($this->question_ids))
 		{
 			return;
 		}
@@ -537,7 +535,7 @@ class qa
 	{
 		global $db, $user;
 
-		if (!strlen($this->confirm_id) || !sizeof($this->question_ids))
+		if (!strlen($this->confirm_id) || !count($this->question_ids))
 		{
 			return false;
 		}
@@ -572,9 +570,9 @@ class qa
 	*/
 	function check_answer()
 	{
-		global $db;
+		global $db, $request;
 
-		$answer = ($this->question_strict) ? utf8_normalize_nfc(request_var('qa_answer', '', true)) : utf8_clean_string(utf8_normalize_nfc(request_var('qa_answer', '', true)));
+		$answer = ($this->question_strict) ? $request->variable('qa_answer', '', true) : utf8_clean_string($request->variable('qa_answer', '', true));
 
 		$sql = 'SELECT answer_text
 			FROM ' . $this->table_captcha_answers . '
@@ -626,7 +624,9 @@ class qa
 	*/
 	function is_solved()
 	{
-		if (request_var('qa_answer', false) && $this->solved === 0)
+		global $request;
+
+		if ($request->variable('qa_answer', false) && $this->solved === 0)
 		{
 			$this->validate();
 		}
@@ -637,10 +637,9 @@ class qa
 	/**
 	*  API function - The ACP backend, this marks the end of the easy methods
 	*/
-	function acp_page($id, &$module)
+	function acp_page($id, $module)
 	{
-		global $user, $template;
-		global $config;
+		global $config, $request, $phpbb_log, $template, $user;
 
 		$user->add_lang('acp/board');
 		$user->add_lang('captcha_qa');
@@ -655,9 +654,9 @@ class qa
 		$form_key = 'acp_captcha';
 		add_form_key($form_key);
 
-		$submit = request_var('submit', false);
-		$question_id = request_var('question_id', 0);
-		$action = request_var('action', '');
+		$submit = $request->variable('submit', false);
+		$question_id = $request->variable('question_id', 0);
+		$action = $request->variable('action', '');
 
 		// we have two pages, so users might want to navigate from one to the other
 		$list_url = $module->u_action . "&amp;configure=1&amp;select_captcha=" . $this->get_service_name();
@@ -762,7 +761,7 @@ class qa
 						$this->acp_add_question($question_input);
 					}
 
-					add_log('admin', 'LOG_CONFIG_VISUAL');
+					$phpbb_log->add('admin', $user->data['user_id'], $user->ip, 'LOG_CONFIG_VISUAL');
 					trigger_error($user->lang['CONFIG_UPDATED'] . adm_back_link($list_url));
 				}
 			}
@@ -776,7 +775,7 @@ class qa
 	/**
 	*  This handles the list overview
 	*/
-	function acp_question_list(&$module)
+	function acp_question_list($module)
 	{
 		global $db, $template;
 
@@ -848,7 +847,9 @@ class qa
 	*/
 	function acp_get_question_input()
 	{
-		$answers = utf8_normalize_nfc(request_var('answers', '', true));
+		global $request;
+
+		$answers = $request->variable('answers', '', true);
 
 		// Convert answers into array and filter if answers are set
 		if (strlen($answers))
@@ -859,9 +860,9 @@ class qa
 		}
 
 		$question = array(
-			'question_text'	=> request_var('question_text', '', true),
-			'strict'		=> request_var('strict', false),
-			'lang_iso'		=> request_var('lang_iso', ''),
+			'question_text'	=> $request->variable('question_text', '', true),
+			'strict'		=> $request->variable('strict', false),
+			'lang_iso'		=> $request->variable('lang_iso', ''),
 			'answers'		=> $answers,
 		);
 		return $question;
@@ -977,7 +978,7 @@ class qa
 
 		if (!isset($langs[$question_data['lang_iso']]) ||
 			!strlen($question_data['question_text']) ||
-			!sizeof($question_data['answers']) ||
+			!count($question_data['answers']) ||
 			!is_array($question_data['answers']))
 		{
 			return false;
diff --git a/phpBB/phpbb/captcha/plugins/recaptcha.php b/phpBB/phpbb/captcha/plugins/recaptcha.php
index 584f3afec1..b7c0b5f5e2 100644
--- a/phpBB/phpbb/captcha/plugins/recaptcha.php
+++ b/phpBB/phpbb/captcha/plugins/recaptcha.php
@@ -18,12 +18,6 @@ class recaptcha extends captcha_abstract
 	var $recaptcha_server = 'http://www.google.com/recaptcha/api';
 	var $recaptcha_server_secure = 'https://www.google.com/recaptcha/api'; // class constants :(
 
-	// We are opening a socket to port 80 of this host and send
-	// the POST request asking for verification to the path specified here.
-	var $recaptcha_verify_server = 'www.google.com';
-	var $recaptcha_verify_path = '/recaptcha/api/verify';
-
-	var $challenge;
 	var $response;
 
 	/**
@@ -37,12 +31,11 @@ class recaptcha extends captcha_abstract
 
 	function init($type)
 	{
-		global $config, $db, $user;
+		global $user, $request;
 
 		$user->add_lang('captcha_recaptcha');
 		parent::init($type);
-		$this->challenge = request_var('recaptcha_challenge_field', '');
-		$this->response = request_var('recaptcha_response_field', '');
+		$this->response = $request->variable('g-recaptcha-response', '');
 	}
 
 	public function is_available()
@@ -73,9 +66,9 @@ class recaptcha extends captcha_abstract
 		throw new \Exception('No generator class given.');
 	}
 
-	function acp_page($id, &$module)
+	function acp_page($id, $module)
 	{
-		global $config, $db, $template, $user;
+		global $config, $template, $user, $phpbb_log, $request;
 
 		$captcha_vars = array(
 			'recaptcha_pubkey'				=> 'RECAPTCHA_PUBKEY',
@@ -87,21 +80,21 @@ class recaptcha extends captcha_abstract
 		$form_key = 'acp_captcha';
 		add_form_key($form_key);
 
-		$submit = request_var('submit', '');
+		$submit = $request->variable('submit', '');
 
 		if ($submit && check_form_key($form_key))
 		{
 			$captcha_vars = array_keys($captcha_vars);
 			foreach ($captcha_vars as $captcha_var)
 			{
-				$value = request_var($captcha_var, '');
+				$value = $request->variable($captcha_var, '');
 				if ($value)
 				{
-					set_config($captcha_var, $value);
+					$config->set($captcha_var, $value);
 				}
 			}
 
-			add_log('admin', 'LOG_CONFIG_VISUAL');
+			$phpbb_log->add('admin', $user->data['user_id'], $user->ip, 'LOG_CONFIG_VISUAL');
 			trigger_error($user->lang['CONFIG_UPDATED'] . adm_back_link($module->u_action));
 		}
 		else if ($submit)
@@ -112,7 +105,7 @@ class recaptcha extends captcha_abstract
 		{
 			foreach ($captcha_vars as $captcha_var => $template_var)
 			{
-				$var = (isset($_REQUEST[$captcha_var])) ? request_var($captcha_var, '') : ((isset($config[$captcha_var])) ? $config[$captcha_var] : '');
+				$var = (isset($_REQUEST[$captcha_var])) ? $request->variable($captcha_var, '') : ((isset($config[$captcha_var])) ? $config[$captcha_var] : '');
 				$template->assign_var($template_var, $var);
 			}
 
@@ -151,7 +144,6 @@ class recaptcha extends captcha_abstract
 			$template->assign_vars(array(
 				'RECAPTCHA_SERVER'			=> $this->recaptcha_server,
 				'RECAPTCHA_PUBKEY'			=> isset($config['recaptcha_pubkey']) ? $config['recaptcha_pubkey'] : '',
-				'RECAPTCHA_ERRORGET'		=> '',
 				'S_RECAPTCHA_AVAILABLE'		=> self::is_available(),
 				'S_CONFIRM_CODE'			=> true,
 				'S_TYPE'					=> $this->type,
@@ -202,106 +194,25 @@ class recaptcha extends captcha_abstract
 		}
 	}
 
-// Code from here on is based on recaptchalib.php
-/*
- * This is a PHP library that handles calling reCAPTCHA.
- *	- Documentation and latest version
- *		  http://recaptcha.net/plugins/php/
- *	- Get a reCAPTCHA API Key
- *		  http://recaptcha.net/api/getkey
- *	- Discussion group
- *		  http://groups.google.com/group/recaptcha
- *
- * Copyright (c) 2007 reCAPTCHA -- http://recaptcha.net
- * AUTHORS:
- *   Mike Crawford
- *   Ben Maurer
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-
-	/**
-	* Submits an HTTP POST to a reCAPTCHA server
-	* @param string $host
-	* @param string $path
-	* @param array $data
-	* @param int port
-	* @return array response
-	*/
-	function _recaptcha_http_post($host, $path, $data, $port = 80)
-	{
-		$req = $this->_recaptcha_qsencode ($data);
-
-		$http_request  = "POST $path HTTP/1.0\r\n";
-		$http_request .= "Host: $host\r\n";
-		$http_request .= "Content-Type: application/x-www-form-urlencoded;\r\n";
-		$http_request .= "Content-Length: " . strlen($req) . "\r\n";
-		$http_request .= "User-Agent: reCAPTCHA/PHP/phpBB\r\n";
-		$http_request .= "\r\n";
-		$http_request .= $req;
-
-		$response = '';
-		if (false == ($fs = @fsockopen($host, $port, $errno, $errstr, 10)))
-		{
-			trigger_error('RECAPTCHA_SOCKET_ERROR', E_USER_ERROR);
-		}
-
-		fwrite($fs, $http_request);
-
-		while (!feof($fs))
-		{
-			// One TCP-IP packet
-			$response .= fgets($fs, 1160);
-		}
-		fclose($fs);
-		$response = explode("\r\n\r\n", $response, 2);
-
-		return $response;
-	}
-
 	/**
 	* Calls an HTTP POST function to verify if the user's guess was correct
-	* @param array $extra_params an array of extra variables to post to the server
-	* @return ReCaptchaResponse
+	*
+	* @return bool|string Returns false on success or error string on failure.
 	*/
-	function recaptcha_check_answer($extra_params = array())
+	function recaptcha_check_answer()
 	{
 		global $config, $user;
 
 		//discard spam submissions
-		if ($this->challenge == null || strlen($this->challenge) == 0 || $this->response == null || strlen($this->response) == 0)
+		if ($this->response == null || strlen($this->response) == 0)
 		{
 			return $user->lang['RECAPTCHA_INCORRECT'];
 		}
 
-		$response = $this->_recaptcha_http_post($this->recaptcha_verify_server, $this->recaptcha_verify_path,
-			array(
-				'privatekey'	=> $config['recaptcha_privkey'],
-				'remoteip'		=> $user->ip,
-				'challenge'		=> $this->challenge,
-				'response'		=> $this->response
-			) + $extra_params
-		);
-
-		$answers = explode("\n", $response[1]);
+		$recaptcha = new \ReCaptcha\ReCaptcha($config['recaptcha_privkey']);
+		$result = $recaptcha->verify($this->response, $user->ip);
 
-		if (trim($answers[0]) === 'true')
+		if ($result->isSuccess())
 		{
 			$this->solved = true;
 			return false;
@@ -311,22 +222,4 @@ class recaptcha extends captcha_abstract
 			return $user->lang['RECAPTCHA_INCORRECT'];
 		}
 	}
-
-	/**
-	* Encodes the given data into a query string format
-	* @param $data - array of string elements to be encoded
-	* @return string - encoded request
-	*/
-	function _recaptcha_qsencode($data)
-	{
-		$req = '';
-		foreach ($data as $key => $value)
-		{
-			$req .= $key . '=' . urlencode(stripslashes($value)) . '&';
-		}
-
-		// Cut the last '&'
-		$req = substr($req, 0, strlen($req) - 1);
-		return $req;
-	}
 }
diff --git a/phpBB/phpbb/composer.json b/phpBB/phpbb/composer.json
index 6b3888ef64..0b6299d6bc 100644
--- a/phpBB/phpbb/composer.json
+++ b/phpBB/phpbb/composer.json
@@ -22,11 +22,11 @@
 		"classmap": [""]
 	},
 	"require": {
-		"php": ">=5.3.3"
+		"php": ">=5.4"
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-master": "3.1.x-dev"
+			"dev-master": "3.3.x-dev"
 		}
 	}
 }
diff --git a/phpBB/phpbb/console/application.php b/phpBB/phpbb/console/application.php
index bc4897af18..dc9b8016b2 100644
--- a/phpBB/phpbb/console/application.php
+++ b/phpBB/phpbb/console/application.php
@@ -13,6 +13,7 @@
 
 namespace phpbb\console;
 
+use Symfony\Component\Console\Input\InputDefinition;
 use Symfony\Component\Console\Shell;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Input\InputOption;
@@ -26,18 +27,18 @@ class application extends \Symfony\Component\Console\Application
 	protected $in_shell = false;
 
 	/**
-	* @var \phpbb\user User object
+	* @var \phpbb\language\language User object
 	*/
-	protected $user;
+	protected $language;
 
 	/**
-	* @param string			$name		The name of the application
-	* @param string			$version	The version of the application
-	* @param \phpbb\user	$user		The user which runs the application (used for translation)
+	* @param string						$name		The name of the application
+	* @param string						$version	The version of the application
+	* @param \phpbb\language\language	$language	The user which runs the application (used for translation)
 	*/
-	public function __construct($name, $version, \phpbb\user $user)
+	public function __construct($name, $version, \phpbb\language\language $language)
 	{
-		$this->user = $user;
+		$this->language = $language;
 
 		parent::__construct($name, $version);
 	}
@@ -49,12 +50,7 @@ class application extends \Symfony\Component\Console\Application
 	{
 		$input_definition = parent::getDefaultInputDefinition();
 
-		$input_definition->addOption(new InputOption(
-			'safe-mode',
-			null,
-			InputOption::VALUE_NONE,
-			$this->user->lang('CLI_DESCRIPTION_OPTION_SAFE_MODE')
-		));
+		$this->register_global_options($input_definition);
 
 		return $input_definition;
 	}
@@ -76,12 +72,20 @@ class application extends \Symfony\Component\Console\Application
 			return parent::getHelp();
 		}
 
-		$this->getDefinition()->addOption(new InputOption(
-			'--shell',
-			'-s',
-			InputOption::VALUE_NONE,
-			$this->user->lang('CLI_DESCRIPTION_OPTION_SHELL')
-		));
+		try
+		{
+			$definition = $this->getDefinition();
+			$definition->addOption(new InputOption(
+				'--shell',
+				'-s',
+				InputOption::VALUE_NONE,
+				$this->language->lang('CLI_DESCRIPTION_OPTION_SHELL')
+			));
+		}
+		catch (\LogicException $e)
+		{
+			// Do nothing
+		}
 
 		return parent::getHelp();
 	}
@@ -117,4 +121,33 @@ class application extends \Symfony\Component\Console\Application
 
 		return parent::doRun($input, $output);
 	}
+
+	/**
+	 * Register global options
+	 *
+	 * @param InputDefinition $definition An InputDefinition instance
+	 */
+	protected function register_global_options(InputDefinition $definition)
+	{
+		try
+		{
+			$definition->addOption(new InputOption(
+				'safe-mode',
+				null,
+				InputOption::VALUE_NONE,
+				$this->language->lang('CLI_DESCRIPTION_OPTION_SAFE_MODE')
+			));
+
+			$definition->addOption(new InputOption(
+				'env',
+				'e',
+				InputOption::VALUE_REQUIRED,
+				$this->language->lang('CLI_DESCRIPTION_OPTION_ENV')
+			));
+		}
+		catch (\LogicException $e)
+		{
+			// Do nothing
+		}
+	}
 }
diff --git a/phpBB/phpbb/console/command/cache/purge.php b/phpBB/phpbb/console/command/cache/purge.php
index d0c2ef6f72..b7a51b2bb4 100644
--- a/phpBB/phpbb/console/command/cache/purge.php
+++ b/phpBB/phpbb/console/command/cache/purge.php
@@ -14,6 +14,7 @@ namespace phpbb\console\command\cache;
 
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
 
 class purge extends \phpbb\console\command\command
 {
@@ -39,7 +40,7 @@ class purge extends \phpbb\console\command\command
 	* @param \phpbb\cache\driver\driver_interface	$cache	Cache instance
 	* @param \phpbb\db\driver\driver_interface		$db		Database connection
 	* @param \phpbb\auth\auth						$auth	Auth instance
-	* @param \phpbb\log\log							$log	Logger instance
+	* @param \phpbb\log\log_interface				$log	Logger instance
 	* @param \phpbb\config\config					$config	Config instance
 	*/
 	public function __construct(\phpbb\user $user, \phpbb\cache\driver\driver_interface $cache, \phpbb\db\driver\driver_interface $db, \phpbb\auth\auth $auth, \phpbb\log\log_interface $log, \phpbb\config\config $config)
@@ -71,7 +72,7 @@ class purge extends \phpbb\console\command\command
 	* @param InputInterface  $input  An InputInterface instance
 	* @param OutputInterface $output An OutputInterface instance
 	*
-	* @return null
+	* @return void
 	*/
 	protected function execute(InputInterface $input, OutputInterface $output)
 	{
@@ -84,6 +85,7 @@ class purge extends \phpbb\console\command\command
 
 		$this->log->add('admin', ANONYMOUS, '', 'LOG_PURGE_CACHE', time(), array());
 
-		$output->writeln($this->user->lang('PURGE_CACHE_SUCCESS'));
+		$io = new SymfonyStyle($input, $output);
+		$io->success($this->user->lang('PURGE_CACHE_SUCCESS'));
 	}
 }
diff --git a/phpBB/phpbb/console/command/command.php b/phpBB/phpbb/console/command/command.php
index 638c989da2..0124c00d22 100644
--- a/phpBB/phpbb/console/command/command.php
+++ b/phpBB/phpbb/console/command/command.php
@@ -13,6 +13,10 @@
 
 namespace phpbb\console\command;
 
+use Symfony\Component\Console\Helper\ProgressBar;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
+
 abstract class command extends \Symfony\Component\Console\Command\Command
 {
 	/** @var \phpbb\user */
@@ -28,4 +32,45 @@ abstract class command extends \Symfony\Component\Console\Command\Command
 		$this->user = $user;
 		parent::__construct();
 	}
+
+	/**
+	 * Create a styled progress bar
+	 *
+	 * @param int             $max     Max value for the progress bar
+	 * @param SymfonyStyle    $io      Symfony style output decorator
+	 * @param OutputInterface $output  The output stream, used to print messages
+	 * @param bool            $message Should we display message output under the progress bar?
+	 * @return ProgressBar
+	 */
+	public function create_progress_bar($max, SymfonyStyle $io, OutputInterface $output, $message = false)
+	{
+		$progress = $io->createProgressBar($max);
+		if ($output->getVerbosity() === OutputInterface::VERBOSITY_VERBOSE)
+		{
+			$progress->setFormat('<info>[%percent:3s%%]</info> %message%');
+			$progress->setOverwrite(false);
+		}
+		else if ($output->getVerbosity() >= OutputInterface::VERBOSITY_VERY_VERBOSE)
+		{
+			$progress->setFormat('<info>[%current:s%/%max:s%]</info><comment>[%elapsed%/%estimated%][%memory%]</comment> %message%');
+			$progress->setOverwrite(false);
+		}
+		else
+		{
+			$io->newLine(2);
+			$progress->setFormat(
+				"    %current:s%/%max:s% %bar%  %percent:3s%%\n" .
+				"        " . ($message ? '%message%' : '                ') . " %elapsed:6s%/%estimated:-6s% %memory:6s%\n");
+			$progress->setBarWidth(60);
+		}
+
+		if (!defined('PHP_WINDOWS_VERSION_BUILD'))
+		{
+			$progress->setEmptyBarCharacter('░'); // light shade character \u2591
+			$progress->setProgressCharacter('');
+			$progress->setBarCharacter('▓'); // dark shade character \u2593
+		}
+
+		return $progress;
+	}
 }
diff --git a/phpBB/phpbb/console/command/config/command.php b/phpBB/phpbb/console/command/config/command.php
index f0ad5d4d19..19f67d3b6c 100644
--- a/phpBB/phpbb/console/command/config/command.php
+++ b/phpBB/phpbb/console/command/config/command.php
@@ -17,7 +17,7 @@ abstract class command extends \phpbb\console\command\command
 	/** @var \phpbb\config\config */
 	protected $config;
 
-	function __construct(\phpbb\user $user, \phpbb\config\config $config)
+	public function __construct(\phpbb\user $user, \phpbb\config\config $config)
 	{
 		$this->config = $config;
 
diff --git a/phpBB/phpbb/console/command/config/delete.php b/phpBB/phpbb/console/command/config/delete.php
index efd276d7e3..2da0801337 100644
--- a/phpBB/phpbb/console/command/config/delete.php
+++ b/phpBB/phpbb/console/command/config/delete.php
@@ -15,6 +15,7 @@ namespace phpbb\console\command\config;
 use Symfony\Component\Console\Input\InputArgument;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
 
 class delete extends command
 {
@@ -42,22 +43,24 @@ class delete extends command
 	* @param InputInterface  $input  An InputInterface instance
 	* @param OutputInterface $output An OutputInterface instance
 	*
-	* @return null
+	* @return void
 	* @see \phpbb\config\config::delete()
 	*/
 	protected function execute(InputInterface $input, OutputInterface $output)
 	{
+		$io = new SymfonyStyle($input, $output);
+
 		$key = $input->getArgument('key');
 
 		if (isset($this->config[$key]))
 		{
 			$this->config->delete($key);
 
-			$output->writeln('<info>' . $this->user->lang('CLI_CONFIG_DELETE_SUCCESS', $key) . '</info>');
+			$io->success($this->user->lang('CLI_CONFIG_DELETE_SUCCESS', $key));
 		}
 		else
 		{
-			$output->writeln('<error>' . $this->user->lang('CLI_CONFIG_NOT_EXISTS', $key) . '</error>');
+			$io->error($this->user->lang('CLI_CONFIG_NOT_EXISTS', $key));
 		}
 	}
 }
diff --git a/phpBB/phpbb/console/command/config/get.php b/phpBB/phpbb/console/command/config/get.php
index 9c03b49a3d..f065787110 100644
--- a/phpBB/phpbb/console/command/config/get.php
+++ b/phpBB/phpbb/console/command/config/get.php
@@ -16,6 +16,7 @@ use Symfony\Component\Console\Input\InputArgument;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Input\InputOption;
 use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
 
 class get extends command
 {
@@ -49,11 +50,13 @@ class get extends command
 	* @param InputInterface  $input  An InputInterface instance
 	* @param OutputInterface $output An OutputInterface instance
 	*
-	* @return null
+	* @return void
 	* @see \phpbb\config\config::offsetGet()
 	*/
 	protected function execute(InputInterface $input, OutputInterface $output)
 	{
+		$io = new SymfonyStyle($input, $output);
+
 		$key = $input->getArgument('key');
 
 		if (isset($this->config[$key]) && $input->getOption('no-newline'))
@@ -66,7 +69,7 @@ class get extends command
 		}
 		else
 		{
-			$output->writeln('<error>' . $this->user->lang('CLI_CONFIG_NOT_EXISTS', $key) . '</error>');
+			$io->error($this->user->lang('CLI_CONFIG_NOT_EXISTS', $key));
 		}
 	}
 }
diff --git a/phpBB/phpbb/console/command/config/increment.php b/phpBB/phpbb/console/command/config/increment.php
index b4d7438b66..647380a0bf 100644
--- a/phpBB/phpbb/console/command/config/increment.php
+++ b/phpBB/phpbb/console/command/config/increment.php
@@ -16,6 +16,7 @@ use Symfony\Component\Console\Input\InputArgument;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Input\InputOption;
 use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
 
 class increment extends command
 {
@@ -54,17 +55,19 @@ class increment extends command
 	* @param InputInterface  $input  An InputInterface instance
 	* @param OutputInterface $output An OutputInterface instance
 	*
-	* @return null
+	* @return void
 	* @see \phpbb\config\config::increment()
 	*/
 	protected function execute(InputInterface $input, OutputInterface $output)
 	{
+		$io = new SymfonyStyle($input, $output);
+
 		$key = $input->getArgument('key');
 		$increment = $input->getArgument('increment');
 		$use_cache = !$input->getOption('dynamic');
 
 		$this->config->increment($key, $increment, $use_cache);
 
-		$output->writeln('<info>' . $this->user->lang('CLI_CONFIG_INCREMENT_SUCCESS', $key) . '</info>');
+		$io->success($this->user->lang('CLI_CONFIG_INCREMENT_SUCCESS', $key));
 	}
 }
diff --git a/phpBB/phpbb/console/command/config/set.php b/phpBB/phpbb/console/command/config/set.php
index 695de31013..e9f7f8f91e 100644
--- a/phpBB/phpbb/console/command/config/set.php
+++ b/phpBB/phpbb/console/command/config/set.php
@@ -16,6 +16,7 @@ use Symfony\Component\Console\Input\InputArgument;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Input\InputOption;
 use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
 
 class set extends command
 {
@@ -54,17 +55,19 @@ class set extends command
 	* @param InputInterface  $input  An InputInterface instance
 	* @param OutputInterface $output An OutputInterface instance
 	*
-	* @return null
+	* @return void
 	* @see \phpbb\config\config::set()
 	*/
 	protected function execute(InputInterface $input, OutputInterface $output)
 	{
+		$io = new SymfonyStyle($input, $output);
+
 		$key = $input->getArgument('key');
 		$value = $input->getArgument('value');
 		$use_cache = !$input->getOption('dynamic');
 
 		$this->config->set($key, $value, $use_cache);
 
-		$output->writeln('<info>' . $this->user->lang('CLI_CONFIG_SET_SUCCESS', $key) . '</info>');
+		$io->success($this->user->lang('CLI_CONFIG_SET_SUCCESS', $key));
 	}
 }
diff --git a/phpBB/phpbb/console/command/config/set_atomic.php b/phpBB/phpbb/console/command/config/set_atomic.php
index e8c69a0885..475d8a9271 100644
--- a/phpBB/phpbb/console/command/config/set_atomic.php
+++ b/phpBB/phpbb/console/command/config/set_atomic.php
@@ -16,6 +16,7 @@ use Symfony\Component\Console\Input\InputArgument;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Input\InputOption;
 use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
 
 class set_atomic extends command
 {
@@ -65,6 +66,8 @@ class set_atomic extends command
 	*/
 	protected function execute(InputInterface $input, OutputInterface $output)
 	{
+		$io = new SymfonyStyle($input, $output);
+
 		$key = $input->getArgument('key');
 		$old_value = $input->getArgument('old');
 		$new_value = $input->getArgument('new');
@@ -72,12 +75,12 @@ class set_atomic extends command
 
 		if ($this->config->set_atomic($key, $old_value, $new_value, $use_cache))
 		{
-			$output->writeln('<info>' . $this->user->lang('CLI_CONFIG_SET_SUCCESS', $key) . '</info>');
+			$io->success($this->user->lang('CLI_CONFIG_SET_SUCCESS', $key));
 			return 0;
 		}
 		else
 		{
-			$output->writeln('<error>' . $this->user->lang('CLI_CONFIG_SET_FAILURE', $key) . '</error>');
+			$io->error($this->user->lang('CLI_CONFIG_SET_FAILURE', $key));
 			return 1;
 		}
 	}
diff --git a/phpBB/phpbb/console/command/cron/cron_list.php b/phpBB/phpbb/console/command/cron/cron_list.php
index c515fd9e80..ea61e45235 100644
--- a/phpBB/phpbb/console/command/cron/cron_list.php
+++ b/phpBB/phpbb/console/command/cron/cron_list.php
@@ -14,6 +14,7 @@ namespace phpbb\console\command\cron;
 
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
 
 class cron_list extends \phpbb\console\command\command
 {
@@ -51,61 +52,43 @@ class cron_list extends \phpbb\console\command\command
 	* @param InputInterface  $input  An InputInterface instance
 	* @param OutputInterface $output An OutputInterface instance
 	*
-	* @return null
+	* @return void
 	*/
 	protected function execute(InputInterface $input, OutputInterface $output)
 	{
+		$io = new SymfonyStyle($input, $output);
+
 		$tasks = $this->cron_manager->get_tasks();
 
 		if (empty($tasks))
 		{
-			$output->writeln($this->user->lang('CRON_NO_TASKS'));
+			$io->error($this->user->lang('CRON_NO_TASKS'));
 			return;
 		}
 
-		$ready_tasks = array();
-		$not_ready_tasks = array();
+		$ready_tasks = $not_ready_tasks = array();
 		foreach ($tasks as $task)
 		{
 			if ($task->is_ready())
 			{
-				$ready_tasks[] = $task;
+				$ready_tasks[] = $task->get_name();
 			}
 			else
 			{
-				$not_ready_tasks[] = $task;
+				$not_ready_tasks[] = $task->get_name();
 			}
 		}
 
 		if (!empty($ready_tasks))
 		{
-			$output->writeln('<info>' . $this->user->lang('TASKS_READY') . '</info>');
-			$this->print_tasks_names($ready_tasks, $output);
-		}
-
-		if (!empty($ready_tasks) && !empty($not_ready_tasks))
-		{
-			$output->writeln('');
+			$io->title($this->user->lang('TASKS_READY'));
+			$io->listing($ready_tasks);
 		}
 
 		if (!empty($not_ready_tasks))
 		{
-			$output->writeln('<info>' . $this->user->lang('TASKS_NOT_READY') . '</info>');
-			$this->print_tasks_names($not_ready_tasks, $output);
-		}
-	}
-
-	/**
-	* Print a list of cron jobs
-	*
-	* @param array				$tasks A list of task to display
-	* @param OutputInterface	$output An OutputInterface instance
-	*/
-	protected function print_tasks_names(array $tasks, OutputInterface $output)
-	{
-		foreach ($tasks as $task)
-		{
-			$output->writeln($task->get_name());
+			$io->title($this->user->lang('TASKS_NOT_READY'));
+			$io->listing($not_ready_tasks);
 		}
 	}
 }
diff --git a/phpBB/phpbb/console/command/cron/run.php b/phpBB/phpbb/console/command/cron/run.php
index a9648fcd41..dea6493007 100644
--- a/phpBB/phpbb/console/command/cron/run.php
+++ b/phpBB/phpbb/console/command/cron/run.php
@@ -13,6 +13,7 @@
 
 namespace phpbb\console\command\cron;
 
+use phpbb\exception\runtime_exception;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Input\InputArgument;
 use Symfony\Component\Console\Output\OutputInterface;
@@ -93,8 +94,7 @@ class run extends \phpbb\console\command\command
 		}
 		else
 		{
-			$output->writeln('<error>' . $this->user->lang('CRON_LOCK_ERROR') . '</error>');
-			return 1;
+			throw new runtime_exception('CRON_LOCK_ERROR', array(), null, 1);
 		}
 	}
 
@@ -165,8 +165,7 @@ class run extends \phpbb\console\command\command
 		}
 		else
 		{
-			$output->writeln('<error>' . $this->user->lang('CRON_NO_SUCH_TASK', $task_name) . '</error>');
-			return 2;
+			throw new runtime_exception('CRON_NO_SUCH_TASK', array( $task_name), null, 2);
 		}
 	}
 }
diff --git a/phpBB/phpbb/console/command/db/console_migrator_output_handler.php b/phpBB/phpbb/console/command/db/console_migrator_output_handler.php
index b9741a3838..568b2646d4 100644
--- a/phpBB/phpbb/console/command/db/console_migrator_output_handler.php
+++ b/phpBB/phpbb/console/command/db/console_migrator_output_handler.php
@@ -13,8 +13,8 @@
 
 namespace phpbb\console\command\db;
 
+use phpbb\db\output_handler\migrator_output_handler_interface;
 use phpbb\user;
-use phpbb\db\migrator_output_handler_interface;
 use Symfony\Component\Console\Output\OutputInterface;
 
 class console_migrator_output_handler implements migrator_output_handler_interface
diff --git a/phpBB/phpbb/console/command/db/list_command.php b/phpBB/phpbb/console/command/db/list_command.php
new file mode 100644
index 0000000000..77f26dd786
--- /dev/null
+++ b/phpBB/phpbb/console/command/db/list_command.php
@@ -0,0 +1,81 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+namespace phpbb\console\command\db;
+
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Input\InputOption;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
+
+class list_command extends \phpbb\console\command\db\migration_command
+{
+	protected function configure()
+	{
+		$this
+			->setName('db:list')
+			->setDescription($this->user->lang('CLI_DESCRIPTION_DB_LIST'))
+			->addOption(
+				'available',
+				'u',
+				InputOption::VALUE_NONE,
+				$this->user->lang('CLI_MIGRATIONS_ONLY_AVAILABLE')
+			)
+		;
+	}
+
+	protected function execute(InputInterface $input, OutputInterface $output)
+	{
+		$io = new SymfonyStyle($input, $output);
+
+		$show_installed = !$input->getOption('available');
+		$installed = $available = array();
+
+		foreach ($this->load_migrations() as $name)
+		{
+			if ($this->migrator->migration_state($name) !== false)
+			{
+				$installed[] = $name;
+			}
+			else
+			{
+				$available[] = $name;
+			}
+		}
+
+		if ($show_installed)
+		{
+			$io->section($this->user->lang('CLI_MIGRATIONS_INSTALLED'));
+
+			if (!empty($installed))
+			{
+				$io->listing($installed);
+			}
+			else
+			{
+				$io->text($this->user->lang('CLI_MIGRATIONS_EMPTY'));
+				$io->newLine();
+			}
+		}
+
+		$io->section($this->user->lang('CLI_MIGRATIONS_AVAILABLE'));
+		if (!empty($available))
+		{
+			$io->listing($available);
+		}
+		else
+		{
+			$io->text($this->user->lang('CLI_MIGRATIONS_EMPTY'));
+			$io->newLine();
+		}
+	}
+}
diff --git a/phpBB/phpbb/console/command/db/migrate.php b/phpBB/phpbb/console/command/db/migrate.php
index 87c2a057d1..4270e2d703 100644
--- a/phpBB/phpbb/console/command/db/migrate.php
+++ b/phpBB/phpbb/console/command/db/migrate.php
@@ -12,52 +12,48 @@
 */
 namespace phpbb\console\command\db;
 
+use phpbb\db\output_handler\log_wrapper_migrator_output_handler;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
 
-class migrate extends \phpbb\console\command\command
+class migrate extends \phpbb\console\command\db\migration_command
 {
-	/** @var \phpbb\db\migrator */
-	protected $migrator;
-
-	/** @var \phpbb\extension\manager */
-	protected $extension_manager;
-
-	/** @var \phpbb\config\config */
-	protected $config;
-
-	/** @var \phpbb\cache\service */
-	protected $cache;
-
 	/** @var \phpbb\log\log */
 	protected $log;
 
 	/** @var string phpBB root path */
 	protected $phpbb_root_path;
 
-	function __construct(\phpbb\user $user, \phpbb\db\migrator $migrator, \phpbb\extension\manager $extension_manager, \phpbb\config\config $config, \phpbb\cache\service $cache, \phpbb\log\log $log, $phpbb_root_path)
+	/** @var  \phpbb\filesystem\filesystem_interface */
+	protected $filesystem;
+
+	/** @var \phpbb\language\language */
+	protected $language;
+
+	public function __construct(\phpbb\user $user, \phpbb\language\language $language, \phpbb\db\migrator $migrator, \phpbb\extension\manager $extension_manager, \phpbb\config\config $config, \phpbb\cache\service $cache, \phpbb\log\log $log, \phpbb\filesystem\filesystem_interface $filesystem, $phpbb_root_path)
 	{
-		$this->migrator = $migrator;
-		$this->extension_manager = $extension_manager;
-		$this->config = $config;
-		$this->cache = $cache;
+		$this->language = $language;
 		$this->log = $log;
+		$this->filesystem = $filesystem;
 		$this->phpbb_root_path = $phpbb_root_path;
-		parent::__construct($user);
-		$this->user->add_lang(array('common', 'install', 'migrator'));
+		parent::__construct($user, $migrator, $extension_manager, $config, $cache);
+		$this->language->add_lang(array('common', 'install', 'migrator'));
 	}
 
 	protected function configure()
 	{
 		$this
 			->setName('db:migrate')
-			->setDescription($this->user->lang('CLI_DESCRIPTION_DB_MIGRATE'))
+			->setDescription($this->language->lang('CLI_DESCRIPTION_DB_MIGRATE'))
 		;
 	}
 
 	protected function execute(InputInterface $input, OutputInterface $output)
 	{
-		$this->migrator->set_output_handler(new \phpbb\db\log_wrapper_migrator_output_handler($this->user, new console_migrator_output_handler($this->user, $output), $this->phpbb_root_path . 'store/migrations_' . time() . '.log'));
+		$io = new SymfonyStyle($input, $output);
+
+		$this->migrator->set_output_handler(new log_wrapper_migrator_output_handler($this->language, new console_migrator_output_handler($this->user, $output), $this->phpbb_root_path . 'store/migrations_' . time() . '.log', $this->filesystem));
 
 		$this->migrator->create_migrations_table();
 
@@ -73,7 +69,7 @@ class migrate extends \phpbb\console\command\command
 			}
 			catch (\phpbb\db\migration\exception $e)
 			{
-				$output->writeln('<error>' . $e->getLocalisedMessage($this->user) . '</error>');
+				$io->error($e->getLocalisedMessage($this->user));
 				$this->finalise_update();
 				return 1;
 			}
@@ -85,23 +81,6 @@ class migrate extends \phpbb\console\command\command
 		}
 
 		$this->finalise_update();
-		$output->writeln($this->user->lang['DATABASE_UPDATE_COMPLETE']);
-	}
-
-	protected function load_migrations()
-	{
-		$migrations = $this->extension_manager
-			->get_finder()
-			->core_path('phpbb/db/migration/data/')
-			->extension_directory('/migrations')
-			->get_classes();
-
-		$this->migrator->set_migrations($migrations);
-	}
-
-	protected function finalise_update()
-	{
-		$this->cache->purge();
-		$this->config->increment('assets_version', 1);
+		$io->success($this->language->lang('INLINE_UPDATE_SUCCESSFUL'));
 	}
 }
diff --git a/phpBB/phpbb/console/command/db/migration_command.php b/phpBB/phpbb/console/command/db/migration_command.php
new file mode 100644
index 0000000000..851f404fab
--- /dev/null
+++ b/phpBB/phpbb/console/command/db/migration_command.php
@@ -0,0 +1,56 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+namespace phpbb\console\command\db;
+
+abstract class migration_command extends \phpbb\console\command\command
+{
+	/** @var \phpbb\db\migrator */
+	protected $migrator;
+
+	/** @var \phpbb\extension\manager */
+	protected $extension_manager;
+
+	/** @var \phpbb\config\config */
+	protected $config;
+
+	/** @var \phpbb\cache\service */
+	protected $cache;
+
+	public function __construct(\phpbb\user $user, \phpbb\db\migrator $migrator, \phpbb\extension\manager $extension_manager, \phpbb\config\config $config, \phpbb\cache\service $cache)
+	{
+		$this->migrator = $migrator;
+		$this->extension_manager = $extension_manager;
+		$this->config = $config;
+		$this->cache = $cache;
+		parent::__construct($user);
+	}
+
+	protected function load_migrations()
+	{
+		$migrations = $this->extension_manager
+			->get_finder()
+			->core_path('phpbb/db/migration/data/')
+			->extension_directory('/migrations')
+			->get_classes();
+
+		$this->migrator->set_migrations($migrations);
+
+		return $this->migrator->get_migrations();
+	}
+
+	protected function finalise_update()
+	{
+		$this->cache->purge();
+		$this->config->increment('assets_version', 1);
+	}
+}
diff --git a/phpBB/phpbb/console/command/db/revert.php b/phpBB/phpbb/console/command/db/revert.php
new file mode 100644
index 0000000000..3c79d8c554
--- /dev/null
+++ b/phpBB/phpbb/console/command/db/revert.php
@@ -0,0 +1,74 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+namespace phpbb\console\command\db;
+
+use phpbb\db\output_handler\log_wrapper_migrator_output_handler;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
+
+class revert extends \phpbb\console\command\db\migrate
+{
+	protected function configure()
+	{
+		$this
+			->setName('db:revert')
+			->setDescription($this->language->lang('CLI_DESCRIPTION_DB_REVERT'))
+			->addArgument(
+				'name',
+				InputArgument::REQUIRED,
+				$this->language->lang('CLI_MIGRATION_NAME')
+			)
+		;
+	}
+
+	protected function execute(InputInterface $input, OutputInterface $output)
+	{
+		$io = new SymfonyStyle($input, $output);
+
+		$name = str_replace('/', '\\', $input->getArgument('name'));
+
+		$this->migrator->set_output_handler(new log_wrapper_migrator_output_handler($this->language, new console_migrator_output_handler($this->user, $output), $this->phpbb_root_path . 'store/migrations_' . time() . '.log', $this->filesystem));
+
+		$this->cache->purge();
+
+		if (!in_array($name, $this->load_migrations()))
+		{
+			$io->error($this->language->lang('MIGRATION_NOT_VALID', $name));
+			return 1;
+		}
+		else if ($this->migrator->migration_state($name) === false)
+		{
+			$io->error($this->language->lang('MIGRATION_NOT_INSTALLED', $name));
+			return 1;
+		}
+
+		try
+		{
+			while ($this->migrator->migration_state($name) !== false)
+			{
+				$this->migrator->revert($name);
+			}
+		}
+		catch (\phpbb\db\migration\exception $e)
+		{
+			$io->error($e->getLocalisedMessage($this->user));
+			$this->finalise_update();
+			return 1;
+		}
+
+		$this->finalise_update();
+		$io->success($this->language->lang('INLINE_UPDATE_SUCCESSFUL'));
+	}
+}
diff --git a/phpBB/phpbb/console/command/dev/migration_tips.php b/phpBB/phpbb/console/command/dev/migration_tips.php
index f9047bdac8..2ca0ddde2f 100644
--- a/phpBB/phpbb/console/command/dev/migration_tips.php
+++ b/phpBB/phpbb/console/command/dev/migration_tips.php
@@ -20,7 +20,7 @@ class migration_tips extends \phpbb\console\command\command
 	/** @var \phpbb\extension\manager */
 	protected $extension_manager;
 
-	function __construct(\phpbb\user $user, \phpbb\extension\manager $extension_manager)
+	public function __construct(\phpbb\user $user, \phpbb\extension\manager $extension_manager)
 	{
 		$this->extension_manager = $extension_manager;
 		parent::__construct($user);
diff --git a/phpBB/phpbb/console/command/extension/disable.php b/phpBB/phpbb/console/command/extension/disable.php
index 1eee16cbd9..b2e10fb960 100644
--- a/phpBB/phpbb/console/command/extension/disable.php
+++ b/phpBB/phpbb/console/command/extension/disable.php
@@ -15,6 +15,7 @@ namespace phpbb\console\command\extension;
 use Symfony\Component\Console\Input\InputArgument;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
 
 class disable extends command
 {
@@ -33,19 +34,28 @@ class disable extends command
 
 	protected function execute(InputInterface $input, OutputInterface $output)
 	{
+		$io = new SymfonyStyle($input, $output);
+
 		$name = $input->getArgument('extension-name');
+
+		if (!$this->manager->is_enabled($name))
+		{
+			$io->error($this->user->lang('CLI_EXTENSION_DISABLED', $name));
+			return 2;
+		}
+
 		$this->manager->disable($name);
 		$this->manager->load_extensions();
 
 		if ($this->manager->is_enabled($name))
 		{
-			$output->writeln('<error>' . $this->user->lang('CLI_EXTENSION_DISABLE_FAILURE', $name) . '</error>');
+			$io->error($this->user->lang('CLI_EXTENSION_DISABLE_FAILURE', $name));
 			return 1;
 		}
 		else
 		{
 			$this->log->add('admin', ANONYMOUS, '', 'LOG_EXT_DISABLE', time(), array($name));
-			$output->writeln('<info>' . $this->user->lang('CLI_EXTENSION_DISABLE_SUCCESS', $name) . '</info>');
+			$io->success($this->user->lang('CLI_EXTENSION_DISABLE_SUCCESS', $name));
 			return 0;
 		}
 	}
diff --git a/phpBB/phpbb/console/command/extension/enable.php b/phpBB/phpbb/console/command/extension/enable.php
index 59ff11e9b7..a6f5b10e86 100644
--- a/phpBB/phpbb/console/command/extension/enable.php
+++ b/phpBB/phpbb/console/command/extension/enable.php
@@ -15,6 +15,7 @@ namespace phpbb\console\command\extension;
 use Symfony\Component\Console\Input\InputArgument;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
 
 class enable extends command
 {
@@ -33,19 +34,42 @@ class enable extends command
 
 	protected function execute(InputInterface $input, OutputInterface $output)
 	{
+		$io = new SymfonyStyle($input, $output);
+
 		$name = $input->getArgument('extension-name');
+
+		if (!$this->manager->is_available($name))
+		{
+			$io->error($this->user->lang('CLI_EXTENSION_NOT_EXIST', $name));
+			return 1;
+		}
+
+		$extension = $this->manager->get_extension($name);
+
+		if (!$extension->is_enableable())
+		{
+			$io->error($this->user->lang('CLI_EXTENSION_NOT_ENABLEABLE', $name));
+			return 1;
+		}
+
+		if ($this->manager->is_enabled($name))
+		{
+			$io->error($this->user->lang('CLI_EXTENSION_ENABLED', $name));
+			return 1;
+		}
+
 		$this->manager->enable($name);
 		$this->manager->load_extensions();
 
 		if ($this->manager->is_enabled($name))
 		{
 			$this->log->add('admin', ANONYMOUS, '', 'LOG_EXT_ENABLE', time(), array($name));
-			$output->writeln('<info>' . $this->user->lang('CLI_EXTENSION_ENABLE_SUCCESS', $name) . '</info>');
+			$io->success($this->user->lang('CLI_EXTENSION_ENABLE_SUCCESS', $name));
 			return 0;
 		}
 		else
 		{
-			$output->writeln('<error>' . $this->user->lang('CLI_EXTENSION_ENABLE_FAILURE', $name) . '</error>');
+			$io->error($this->user->lang('CLI_EXTENSION_ENABLE_FAILURE', $name));
 			return 1;
 		}
 	}
diff --git a/phpBB/phpbb/console/command/extension/purge.php b/phpBB/phpbb/console/command/extension/purge.php
index 517e9a74c9..25bde503f7 100644
--- a/phpBB/phpbb/console/command/extension/purge.php
+++ b/phpBB/phpbb/console/command/extension/purge.php
@@ -15,6 +15,7 @@ namespace phpbb\console\command\extension;
 use Symfony\Component\Console\Input\InputArgument;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
 
 class purge extends command
 {
@@ -33,19 +34,21 @@ class purge extends command
 
 	protected function execute(InputInterface $input, OutputInterface $output)
 	{
+		$io = new SymfonyStyle($input, $output);
+
 		$name = $input->getArgument('extension-name');
 		$this->manager->purge($name);
 		$this->manager->load_extensions();
 
 		if ($this->manager->is_enabled($name))
 		{
-			$output->writeln('<error>' . $this->user->lang('CLI_EXTENSION_PURGE_FAILURE', $name) . '</error>');
+			$io->error($this->user->lang('CLI_EXTENSION_PURGE_FAILURE', $name));
 			return 1;
 		}
 		else
 		{
 			$this->log->add('admin', ANONYMOUS, '', 'LOG_EXT_PURGE', time(), array($name));
-			$output->writeln('<info>' . $this->user->lang('CLI_EXTENSION_PURGE_SUCCESS', $name) . '</info>');
+			$io->success($this->user->lang('CLI_EXTENSION_PURGE_SUCCESS', $name));
 			return 0;
 		}
 	}
diff --git a/phpBB/phpbb/console/command/extension/show.php b/phpBB/phpbb/console/command/extension/show.php
index f9322034d7..7bad0c0a5a 100644
--- a/phpBB/phpbb/console/command/extension/show.php
+++ b/phpBB/phpbb/console/command/extension/show.php
@@ -14,6 +14,7 @@ namespace phpbb\console\command\extension;
 
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
 
 class show extends command
 {
@@ -27,36 +28,27 @@ class show extends command
 
 	protected function execute(InputInterface $input, OutputInterface $output)
 	{
+		$io = new SymfonyStyle($input, $output);
+
 		$this->manager->load_extensions();
 		$all = array_keys($this->manager->all_available());
 
 		if (empty($all))
 		{
-			$output->writeln('<comment>' . $this->user->lang('CLI_EXTENSION_NOT_FOUND') . '</comment>');
+			$io->note($this->user->lang('CLI_EXTENSION_NOT_FOUND'));
 			return 3;
 		}
 
 		$enabled = array_keys($this->manager->all_enabled());
-		$this->print_extension_list($output, $this->user->lang('CLI_EXTENSIONS_ENABLED') . $this->user->lang('COLON'), $enabled);
-
-		$output->writeln('');
+		$io->section($this->user->lang('CLI_EXTENSIONS_ENABLED'));
+		$io->listing($enabled);
 
 		$disabled = array_keys($this->manager->all_disabled());
-		$this->print_extension_list($output, $this->user->lang('CLI_EXTENSIONS_DISABLED') . $this->user->lang('COLON'), $disabled);
-
-		$output->writeln('');
+		$io->section($this->user->lang('CLI_EXTENSIONS_DISABLED'));
+		$io->listing($disabled);
 
 		$purged = array_diff($all, $enabled, $disabled);
-		$this->print_extension_list($output, $this->user->lang('CLI_EXTENSIONS_AVAILABLE') . $this->user->lang('COLON'), $purged);
-	}
-
-	protected function print_extension_list(OutputInterface $output, $type, array $extensions)
-	{
-		$output->writeln("<info>$type</info>");
-
-		foreach ($extensions as $extension)
-		{
-			$output->writeln(" - $extension");
-		}
+		$io->section($this->user->lang('CLI_EXTENSIONS_AVAILABLE'));
+		$io->listing($purged);
 	}
 }
diff --git a/phpBB/phpbb/console/command/fixup/fix_left_right_ids.php b/phpBB/phpbb/console/command/fixup/fix_left_right_ids.php
index f55e1761bc..271b099a6c 100644
--- a/phpBB/phpbb/console/command/fixup/fix_left_right_ids.php
+++ b/phpBB/phpbb/console/command/fixup/fix_left_right_ids.php
@@ -15,6 +15,7 @@ namespace phpbb\console\command\fixup;
 
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
 
 class fix_left_right_ids extends \phpbb\console\command\command
 {
@@ -67,6 +68,8 @@ class fix_left_right_ids extends \phpbb\console\command\command
 	*/
 	protected function execute(InputInterface $input, OutputInterface $output)
 	{
+		$io = new SymfonyStyle($input, $output);
+
 		// Fix Left/Right IDs for the modules table
 		$result = $this->db->sql_query('SELECT DISTINCT(module_class) FROM ' . MODULES_TABLE);
 		while ($row = $this->db->sql_fetchrow($result))
@@ -83,7 +86,7 @@ class fix_left_right_ids extends \phpbb\console\command\command
 
 		$this->cache->purge();
 
-		$output->writeln('<info>' . $this->user->lang('CLI_FIXUP_FIX_LEFT_RIGHT_IDS_SUCCESS') . '</info>');
+		$io->success($this->user->lang('CLI_FIXUP_FIX_LEFT_RIGHT_IDS_SUCCESS'));
 	}
 
 	/**
diff --git a/phpBB/phpbb/console/command/fixup/recalculate_email_hash.php b/phpBB/phpbb/console/command/fixup/recalculate_email_hash.php
index ec4e1b0ee7..6f7096296d 100644
--- a/phpBB/phpbb/console/command/fixup/recalculate_email_hash.php
+++ b/phpBB/phpbb/console/command/fixup/recalculate_email_hash.php
@@ -14,13 +14,14 @@ namespace phpbb\console\command\fixup;
 
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
 
 class recalculate_email_hash extends \phpbb\console\command\command
 {
 	/** @var \phpbb\db\driver\driver_interface */
 	protected $db;
 
-	function __construct(\phpbb\user $user, \phpbb\db\driver\driver_interface $db)
+	public function __construct(\phpbb\user $user, \phpbb\db\driver\driver_interface $db)
 	{
 		$this->db = $db;
 
@@ -37,6 +38,8 @@ class recalculate_email_hash extends \phpbb\console\command\command
 
 	protected function execute(InputInterface $input, OutputInterface $output)
 	{
+		$io = new SymfonyStyle($input, $output);
+
 		$sql = 'SELECT user_id, user_email, user_email_hash
 			FROM ' . USERS_TABLE . '
 			WHERE user_type <> ' . USER_IGNORE . "
@@ -59,17 +62,15 @@ class recalculate_email_hash extends \phpbb\console\command\command
 
 				if ($output->getVerbosity() >= OutputInterface::VERBOSITY_DEBUG)
 				{
-					$output->writeln(sprintf(
-						'user_id %d, email %s => %s',
-						$row['user_id'],
-						$row['user_email'],
-						$user_email_hash
-					));
+					$io->table(
+						array('user_id', 'user_email', 'user_email_hash'),
+						array(array($row['user_id'], $row['user_email'], $user_email_hash))
+					);
 				}
 			}
 		}
 		$this->db->sql_freeresult($result);
 
-		$output->writeln('<info>' . $this->user->lang('CLI_FIXUP_RECALCULATE_EMAIL_HASH_SUCCESS') . '</info>');
+		$io->success($this->user->lang('CLI_FIXUP_RECALCULATE_EMAIL_HASH_SUCCESS'));
 	}
 }
diff --git a/phpBB/phpbb/console/command/fixup/update_hashes.php b/phpBB/phpbb/console/command/fixup/update_hashes.php
index 4bcc3b5d19..9a0e9bc798 100644
--- a/phpBB/phpbb/console/command/fixup/update_hashes.php
+++ b/phpBB/phpbb/console/command/fixup/update_hashes.php
@@ -101,9 +101,9 @@ class update_hashes extends \phpbb\console\command\command
 		{
 			$new_hash = $this->passwords_manager->hash($row['user_password'], array($this->default_type));
 
-			$sql = 'UPDATE ' . USERS_TABLE . '
-					SET user_password = "' . $this->db->sql_escape($new_hash) . '"
-					WHERE user_id = ' . (int) $row['user_id'];
+			$sql = 'UPDATE ' . USERS_TABLE . "
+					SET user_password = '" . $this->db->sql_escape($new_hash) . "'
+					WHERE user_id = " . (int) $row['user_id'];
 			$this->db->sql_query($sql);
 			$progress_bar->advance();
 		}
diff --git a/phpBB/phpbb/console/command/reparser/list_all.php b/phpBB/phpbb/console/command/reparser/list_all.php
new file mode 100644
index 0000000000..a79578abf0
--- /dev/null
+++ b/phpBB/phpbb/console/command/reparser/list_all.php
@@ -0,0 +1,72 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\console\command\reparser;
+
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
+
+class list_all extends \phpbb\console\command\command
+{
+	/**
+	* @var string[] Names of the reparser services
+	*/
+	protected $reparser_names;
+
+	/**
+	* Constructor
+	*
+	* @param \phpbb\user $user
+	* @param \phpbb\di\service_collection $reparsers
+	*/
+	public function __construct(\phpbb\user $user, \phpbb\di\service_collection $reparsers)
+	{
+		parent::__construct($user);
+		$this->reparser_names = array();
+		foreach ($reparsers as $reparser)
+		{
+			// Store the names without the "text_reparser." prefix
+			$this->reparser_names[] = $reparser->get_name();
+		}
+	}
+
+	/**
+	* Sets the command name and description
+	*
+	* @return null
+	*/
+	protected function configure()
+	{
+		$this
+			->setName('reparser:list')
+			->setDescription($this->user->lang('CLI_DESCRIPTION_REPARSER_LIST'))
+		;
+	}
+
+	/**
+	* Executes the command reparser:list
+	*
+	* @param InputInterface $input
+	* @param OutputInterface $output
+	* @return integer
+	*/
+	protected function execute(InputInterface $input, OutputInterface $output)
+	{
+		$io = new SymfonyStyle($input, $output);
+		$io->section($this->user->lang('CLI_DESCRIPTION_REPARSER_AVAILABLE'));
+		$io->listing($this->reparser_names);
+
+		return 0;
+	}
+}
diff --git a/phpBB/phpbb/console/command/reparser/reparse.php b/phpBB/phpbb/console/command/reparser/reparse.php
new file mode 100644
index 0000000000..f285977ea2
--- /dev/null
+++ b/phpBB/phpbb/console/command/reparser/reparse.php
@@ -0,0 +1,242 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\console\command\reparser;
+
+use phpbb\exception\runtime_exception;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputOption;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
+
+class reparse extends \phpbb\console\command\command
+{
+	/**
+	* @var InputInterface
+	*/
+	protected $input;
+
+	/**
+	* @var SymfonyStyle
+	*/
+	protected $io;
+
+	/**
+	* @var OutputInterface
+	*/
+	protected $output;
+
+	/**
+	 * @var \phpbb\lock\db
+	 */
+	protected $reparse_lock;
+
+	/**
+	 * @var \phpbb\textreparser\manager
+	 */
+	protected $reparser_manager;
+
+	/**
+	* @var \phpbb\di\service_collection
+	*/
+	protected $reparsers;
+
+	/**
+	* @var array The reparser's last $current ID as values
+	*/
+	protected $resume_data;
+
+	/**
+	* Constructor
+	*
+	* @param \phpbb\user $user
+	* @param \phpbb\lock\db $reparse_lock
+	* @param \phpbb\textreparser\manager $reparser_manager
+	* @param \phpbb\di\service_collection $reparsers
+	*/
+	public function __construct(\phpbb\user $user, \phpbb\lock\db $reparse_lock, \phpbb\textreparser\manager $reparser_manager, \phpbb\di\service_collection $reparsers)
+	{
+		require_once __DIR__ . '/../../../../includes/functions_content.php';
+
+		$this->reparse_lock = $reparse_lock;
+		$this->reparser_manager = $reparser_manager;
+		$this->reparsers = $reparsers;
+		parent::__construct($user);
+	}
+
+	/**
+	* Sets the command name and description
+	*
+	* @return null
+	*/
+	protected function configure()
+	{
+		$this
+			->setName('reparser:reparse')
+			->setDescription($this->user->lang('CLI_DESCRIPTION_REPARSER_REPARSE'))
+			->addArgument('reparser-name', InputArgument::OPTIONAL, $this->user->lang('CLI_DESCRIPTION_REPARSER_REPARSE_ARG_1'))
+			->addOption(
+				'dry-run',
+				null,
+				InputOption::VALUE_NONE,
+				$this->user->lang('CLI_DESCRIPTION_REPARSER_REPARSE_OPT_DRY_RUN')
+			)
+			->addOption(
+				'resume',
+				null,
+				InputOption::VALUE_NONE,
+				$this->user->lang('CLI_DESCRIPTION_REPARSER_REPARSE_OPT_RESUME')
+			)
+			->addOption(
+				'range-min',
+				null,
+				InputOption::VALUE_REQUIRED,
+				$this->user->lang('CLI_DESCRIPTION_REPARSER_REPARSE_OPT_RANGE_MIN'),
+				1
+			)
+			->addOption(
+				'range-max',
+				null,
+				InputOption::VALUE_REQUIRED,
+				$this->user->lang('CLI_DESCRIPTION_REPARSER_REPARSE_OPT_RANGE_MAX')
+			)
+			->addOption(
+				'range-size',
+				null,
+				InputOption::VALUE_REQUIRED,
+				$this->user->lang('CLI_DESCRIPTION_REPARSER_REPARSE_OPT_RANGE_SIZE'),
+				100
+			);
+		;
+	}
+
+	/**
+	* Executes the command reparser:reparse
+	*
+	* @param InputInterface $input
+	* @param OutputInterface $output
+	* @return integer
+	*/
+	protected function execute(InputInterface $input, OutputInterface $output)
+	{
+		$this->input = $input;
+		$this->output = $output;
+		$this->io = new SymfonyStyle($input, $output);
+
+		if (!$this->reparse_lock->acquire())
+		{
+			throw new runtime_exception('REPARSE_LOCK_ERROR', array(), null, 1);
+		}
+
+		$name = $input->getArgument('reparser-name');
+		if ($name)
+		{
+			$name = $this->reparser_manager->find_reparser($name);
+			$this->reparse($name);
+		}
+		else
+		{
+			foreach ($this->reparsers as $name => $service)
+			{
+				$this->reparse($name);
+			}
+		}
+
+		$this->io->success($this->user->lang('CLI_REPARSER_REPARSE_SUCCESS'));
+
+		$this->reparse_lock->release();
+
+		return 0;
+	}
+
+	/**
+	* Get an option value, adjusted for given reparser
+	*
+	* Will use the last saved value if --resume is set and the option was not specified
+	* on the command line
+	*
+	* @param  string  $option_name   Option name
+	* @return integer
+	*/
+	protected function get_option($option_name)
+	{
+		// Return the option from the resume_data if applicable
+		if ($this->input->getOption('resume') && isset($this->resume_data[$option_name]) && !$this->input->hasParameterOption('--' . $option_name))
+		{
+			return $this->resume_data[$option_name];
+		}
+
+		return $this->input->getOption($option_name);
+	}
+
+	/**
+	* Reparse all text handled by given reparser within given range
+	*
+	* @param string $name Reparser service name
+	*/
+	protected function reparse($name)
+	{
+		$reparser = $this->reparsers[$name];
+		$this->resume_data = $this->reparser_manager->get_resume_data($name);
+		if ($this->input->getOption('dry-run'))
+		{
+			$reparser->disable_save();
+		}
+		else
+		{
+			$reparser->enable_save();
+		}
+
+		// Start at range-max if specified or at the highest ID otherwise
+		$max  = $this->get_option('range-max');
+		$min  = $this->get_option('range-min');
+		$size = $this->get_option('range-size');
+
+		// range-max has no default value, it must be computed for each reparser
+		if ($max === null)
+		{
+			$max = $reparser->get_max_id();
+		}
+
+		if ($max < $min)
+		{
+			return;
+		}
+
+		$this->io->section($this->user->lang('CLI_REPARSER_REPARSE_REPARSING', $reparser->get_name(), $min, $max));
+
+		$progress = $this->create_progress_bar($max, $this->io, $this->output, true);
+		$progress->setMessage($this->user->lang('CLI_REPARSER_REPARSE_REPARSING_START', $reparser->get_name()));
+		$progress->start();
+
+		// Start from $max and decrement $current by $size until we reach $min
+		$current = $max;
+		while ($current >= $min)
+		{
+			$start = max($min, $current + 1 - $size);
+			$end   = max($min, $current);
+
+			$progress->setMessage($this->user->lang('CLI_REPARSER_REPARSE_REPARSING', $reparser->get_name(), $start, $end));
+			$reparser->reparse_range($start, $end);
+
+			$current = $start - 1;
+			$progress->setProgress($max + 1 - $start);
+
+			$this->reparser_manager->update_resume_data($name, $min, $current, $size, !$this->input->getOption('dry-run'));
+		}
+		$progress->finish();
+
+		$this->io->newLine(2);
+	}
+}
diff --git a/phpBB/phpbb/console/command/thumbnail/delete.php b/phpBB/phpbb/console/command/thumbnail/delete.php
new file mode 100644
index 0000000000..7b95c20cf2
--- /dev/null
+++ b/phpBB/phpbb/console/command/thumbnail/delete.php
@@ -0,0 +1,160 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+namespace phpbb\console\command\thumbnail;
+
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
+
+class delete extends \phpbb\console\command\command
+{
+	/**
+	* @var \phpbb\config\config
+	*/
+	protected $config;
+
+	/**
+	* @var \phpbb\db\driver\driver_interface
+	*/
+	protected $db;
+
+	/**
+	* phpBB root path
+	* @var string
+	*/
+	protected $phpbb_root_path;
+
+	/**
+	* Constructor
+	*
+	* @param \config\config $config The config
+	* @param \phpbb\user $user The user object (used to get language information)
+	* @param \phpbb\db\driver\driver_interface $db Database connection
+	* @param string $phpbb_root_path Root path
+	*/
+	public function __construct(\phpbb\config\config $config, \phpbb\user $user, \phpbb\db\driver\driver_interface $db, $phpbb_root_path)
+	{
+		$this->config = $config;
+		$this->db = $db;
+		$this->phpbb_root_path = $phpbb_root_path;
+
+		parent::__construct($user);
+	}
+
+	/**
+	* Sets the command name and description
+	*
+	* @return null
+	*/
+	protected function configure()
+	{
+		$this
+			->setName('thumbnail:delete')
+			->setDescription($this->user->lang('CLI_DESCRIPTION_THUMBNAIL_DELETE'))
+		;
+	}
+
+	/**
+	* Executes the command thumbnail:delete.
+	*
+	* Deletes all existing thumbnails and updates the database accordingly.
+	*
+	* @param InputInterface $input The input stream used to get the argument and verbose option.
+	* @param OutputInterface $output The output stream, used for printing verbose-mode and error information.
+	*
+	* @return int 0 if all is ok, 1 if a thumbnail couldn't be deleted.
+	*/
+	protected function execute(InputInterface $input, OutputInterface $output)
+	{
+		$io = new SymfonyStyle($input, $output);
+
+		$io->section($this->user->lang('CLI_THUMBNAIL_DELETING'));
+
+		$sql = 'SELECT COUNT(*) AS nb_missing_thumbnails
+			FROM ' . ATTACHMENTS_TABLE . '
+			WHERE thumbnail = 1';
+		$result = $this->db->sql_query($sql);
+		$nb_missing_thumbnails = (int) $this->db->sql_fetchfield('nb_missing_thumbnails');
+		$this->db->sql_freeresult($result);
+
+		if ($nb_missing_thumbnails === 0)
+		{
+			$io->warning($this->user->lang('CLI_THUMBNAIL_NOTHING_TO_DELETE'));
+			return 0;
+		}
+
+		$sql = 'SELECT attach_id, physical_filename, extension, real_filename, mimetype
+			FROM ' . ATTACHMENTS_TABLE . '
+			WHERE thumbnail = 1';
+		$result = $this->db->sql_query($sql);
+
+		$progress = $this->create_progress_bar($nb_missing_thumbnails, $io, $output);
+
+		$progress->setMessage($this->user->lang('CLI_THUMBNAIL_DELETING'));
+
+		$progress->start();
+
+		$thumbnail_deleted = array();
+		$return = 0;
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			$thumbnail_path = $this->phpbb_root_path . $this->config['upload_path'] . '/thumb_' . $row['physical_filename'];
+
+			if (@unlink($thumbnail_path))
+			{
+				$thumbnail_deleted[] = $row['attach_id'];
+
+				if (count($thumbnail_deleted) === 250)
+				{
+					$this->commit_changes($thumbnail_deleted);
+					$thumbnail_deleted = array();
+				}
+
+				$progress->setMessage($this->user->lang('CLI_THUMBNAIL_DELETED', $row['real_filename'], $row['physical_filename']));
+			}
+			else
+			{
+				$return = 1;
+				$progress->setMessage('<error>' . $this->user->lang('CLI_THUMBNAIL_SKIPPED', $row['real_filename'], $row['physical_filename']) . '</error>');
+			}
+
+			$progress->advance();
+		}
+		$this->db->sql_freeresult($result);
+
+		if (!empty($thumbnail_deleted))
+		{
+			$this->commit_changes($thumbnail_deleted);
+		}
+
+		$progress->finish();
+
+		$io->newLine(2);
+		$io->success($this->user->lang('CLI_THUMBNAIL_DELETING_DONE'));
+
+		return $return;
+	}
+
+	/**
+	* Commits the changes to the database
+	*
+	* @param array $thumbnail_deleted
+	*/
+	protected function commit_changes(array $thumbnail_deleted)
+	{
+		$sql = 'UPDATE ' . ATTACHMENTS_TABLE . '
+				SET thumbnail = 0
+				WHERE ' . $this->db->sql_in_set('attach_id', $thumbnail_deleted);
+		$this->db->sql_query($sql);
+	}
+}
diff --git a/phpBB/phpbb/console/command/thumbnail/generate.php b/phpBB/phpbb/console/command/thumbnail/generate.php
new file mode 100644
index 0000000000..1f6582b17b
--- /dev/null
+++ b/phpBB/phpbb/console/command/thumbnail/generate.php
@@ -0,0 +1,186 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\console\command\thumbnail;
+
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
+
+class generate extends \phpbb\console\command\command
+{
+	/**
+	* @var \phpbb\config\config
+	*/
+	protected $config;
+
+	/**
+	* @var \phpbb\db\driver\driver_interface
+	*/
+	protected $db;
+
+	/**
+	* @var \phpbb\cache\service
+	*/
+	protected $cache;
+
+	/**
+	* phpBB root path
+	* @var string
+	*/
+	protected $phpbb_root_path;
+
+	/**
+	* PHP extension.
+	*
+	* @var string
+	*/
+	protected $php_ext;
+
+	/**
+	* Constructor
+	*
+	* @param \config\config $config The config
+	* @param \phpbb\user $user The user object (used to get language information)
+	* @param \phpbb\db\driver\driver_interface $db Database connection
+	* @param \phpbb\cache\service $cache The cache service
+	* @param string $phpbb_root_path Root path
+	* @param string $php_ext PHP extension
+	*/
+	public function __construct(\phpbb\config\config $config, \phpbb\user $user, \phpbb\db\driver\driver_interface $db, \phpbb\cache\service $cache, $phpbb_root_path, $php_ext)
+	{
+		$this->config = $config;
+		$this->db = $db;
+		$this->cache = $cache;
+		$this->phpbb_root_path = $phpbb_root_path;
+		$this->php_ext = $php_ext;
+
+		parent::__construct($user);
+	}
+
+	/**
+	* Sets the command name and description
+	*
+	* @return null
+	*/
+	protected function configure()
+	{
+		$this
+			->setName('thumbnail:generate')
+			->setDescription($this->user->lang('CLI_DESCRIPTION_THUMBNAIL_GENERATE'))
+		;
+	}
+
+	/**
+	* Executes the command thumbnail:generate.
+	*
+	* Generate a thumbnail for all attachments which need one and don't have it yet.
+	*
+	* @param InputInterface $input The input stream used to get the argument and verboe option.
+	* @param OutputInterface $output The output stream, used for printing verbose-mode and error information.
+	*
+	* @return int 0.
+	*/
+	protected function execute(InputInterface $input, OutputInterface $output)
+	{
+		$io = new SymfonyStyle($input, $output);
+
+		$io->section($this->user->lang('CLI_THUMBNAIL_GENERATING'));
+
+		$sql = 'SELECT COUNT(*) AS nb_missing_thumbnails
+			FROM ' . ATTACHMENTS_TABLE . '
+			WHERE thumbnail = 0';
+		$result = $this->db->sql_query($sql);
+		$nb_missing_thumbnails = (int) $this->db->sql_fetchfield('nb_missing_thumbnails');
+		$this->db->sql_freeresult($result);
+
+		if ($nb_missing_thumbnails === 0)
+		{
+			$io->warning($this->user->lang('CLI_THUMBNAIL_NOTHING_TO_GENERATE'));
+			return 0;
+		}
+
+		$extensions = $this->cache->obtain_attach_extensions(true);
+
+		$sql = 'SELECT attach_id, physical_filename, extension, real_filename, mimetype
+			FROM ' . ATTACHMENTS_TABLE . '
+			WHERE thumbnail = 0';
+		$result = $this->db->sql_query($sql);
+
+		if (!function_exists('create_thumbnail'))
+		{
+			require($this->phpbb_root_path . 'includes/functions_posting.' . $this->php_ext);
+		}
+
+		$progress = $this->create_progress_bar($nb_missing_thumbnails, $io, $output);
+
+		$progress->setMessage($this->user->lang('CLI_THUMBNAIL_GENERATING'));
+
+		$progress->start();
+
+		$thumbnail_created = array();
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			if (isset($extensions[$row['extension']]['display_cat']) && $extensions[$row['extension']]['display_cat'] == ATTACHMENT_CATEGORY_IMAGE)
+			{
+				$source = $this->phpbb_root_path . $this->config['upload_path'] . '/' . $row['physical_filename'];
+				$destination = $this->phpbb_root_path . $this->config['upload_path'] . '/thumb_' . $row['physical_filename'];
+
+				if (create_thumbnail($source, $destination, $row['mimetype']))
+				{
+					$thumbnail_created[] = (int) $row['attach_id'];
+
+					if (count($thumbnail_created) === 250)
+					{
+						$this->commit_changes($thumbnail_created);
+						$thumbnail_created = array();
+					}
+
+					$progress->setMessage($this->user->lang('CLI_THUMBNAIL_GENERATED', $row['real_filename'], $row['physical_filename']));
+				}
+				else
+				{
+					$progress->setMessage('<info>' . $this->user->lang('CLI_THUMBNAIL_SKIPPED', $row['real_filename'], $row['physical_filename']) . '</info>');
+				}
+			}
+
+			$progress->advance();
+		}
+		$this->db->sql_freeresult($result);
+
+		if (!empty($thumbnail_created))
+		{
+			$this->commit_changes($thumbnail_created);
+		}
+
+		$progress->finish();
+
+		$io->newLine(2);
+		$io->success($this->user->lang('CLI_THUMBNAIL_GENERATING_DONE'));
+
+		return 0;
+	}
+
+	/**
+	* Commits the changes to the database
+	*
+	* @param array $thumbnail_created
+	*/
+	protected function commit_changes(array $thumbnail_created)
+	{
+		$sql = 'UPDATE ' . ATTACHMENTS_TABLE . '
+				SET thumbnail = 1
+				WHERE ' . $this->db->sql_in_set('attach_id', $thumbnail_created);
+		$this->db->sql_query($sql);
+	}
+}
diff --git a/phpBB/phpbb/console/command/thumbnail/recreate.php b/phpBB/phpbb/console/command/thumbnail/recreate.php
new file mode 100644
index 0000000000..382da290bf
--- /dev/null
+++ b/phpBB/phpbb/console/command/thumbnail/recreate.php
@@ -0,0 +1,72 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+namespace phpbb\console\command\thumbnail;
+
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Input\ArrayInput;
+use Symfony\Component\Console\Output\OutputInterface;
+
+class recreate extends \phpbb\console\command\command
+{
+	/**
+	* Sets the command name and description
+	*
+	* @return null
+	*/
+	protected function configure()
+	{
+		$this
+			->setName('thumbnail:recreate')
+			->setDescription($this->user->lang('CLI_DESCRIPTION_THUMBNAIL_RECREATE'))
+		;
+	}
+
+	/**
+	* Executes the command thumbnail:recreate.
+	*
+	* This command is a "macro" to execute thumbnail:delete and then thumbnail:generate.
+	*
+	* @param InputInterface $input The input stream used to get the argument and verboe option.
+	* @param OutputInterface $output The output stream, used for printing verbose-mode and error information.
+	*
+	* @return int 0 if all is ok, 1 if a thumbnail couldn't be deleted.
+	*/
+	protected function execute(InputInterface $input, OutputInterface $output)
+	{
+		$parameters = array(
+			'command' => 'thumbnail:delete'
+		);
+
+		if ($input->getOption('verbose'))
+		{
+			$parameters['-' . str_repeat('v', $output->getVerbosity() - 1)] = true;
+		}
+
+		$this->getApplication()->setAutoExit(false);
+
+		$input_delete = new ArrayInput($parameters);
+		$return = $this->getApplication()->run($input_delete, $output);
+
+		if ($return === 0)
+		{
+			$parameters['command'] = 'thumbnail:generate';
+
+			$input_create = new ArrayInput($parameters);
+			$return = $this->getApplication()->run($input_create, $output);
+		}
+
+		$this->getApplication()->setAutoExit(true);
+
+		return $return;
+	}
+}
diff --git a/phpBB/phpbb/console/command/update/check.php b/phpBB/phpbb/console/command/update/check.php
new file mode 100644
index 0000000000..9ced651e8b
--- /dev/null
+++ b/phpBB/phpbb/console/command/update/check.php
@@ -0,0 +1,331 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\console\command\update;
+
+use phpbb\config\config;
+use phpbb\exception\exception_interface;
+use phpbb\language\language;
+use phpbb\user;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputOption;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+class check extends \phpbb\console\command\command
+{
+	/** @var \phpbb\config\config */
+	protected $config;
+
+	/** @var \Symfony\Component\DependencyInjection\ContainerBuilder */
+	protected $phpbb_container;
+	/**
+	 * @var language
+	 */
+	private $language;
+
+	/**
+	* Construct method
+	*/
+	public function __construct(user $user, config $config, ContainerInterface $phpbb_container, language $language)
+	{
+		$this->config = $config;
+		$this->phpbb_container = $phpbb_container;
+		$this->language = $language;
+
+		$this->language->add_lang(array('acp/common', 'acp/extensions'));
+
+		parent::__construct($user);
+	}
+
+	/**
+	* Configures the service.
+	*
+	* Sets the name and description of the command.
+	*
+	* @return null
+	*/
+	protected function configure()
+	{
+		$this
+			->setName('update:check')
+			->setDescription($this->language->lang('CLI_DESCRIPTION_UPDATE_CHECK'))
+			->addArgument('ext-name', InputArgument::OPTIONAL, $this->language->lang('CLI_DESCRIPTION_UPDATE_CHECK_ARGUMENT_1'))
+			->addOption('stability', null, InputOption::VALUE_REQUIRED, $this->language->lang('CLI_DESCRIPTION_UPDATE_CHECK_OPTION_STABILITY'))
+			->addOption('cache', 'c', InputOption::VALUE_NONE, $this->language->lang('CLI_DESCRIPTION_UPDATE_CHECK_OPTION_CACHE'))
+		;
+	}
+
+	/**
+	* Executes the command.
+	*
+	* Checks if an update is available.
+	* If at least one is available, a message is printed and if verbose mode is set the list of possible updates is printed.
+	* If their is none, nothing is printed unless verbose mode is set.
+	*
+	* @param InputInterface $input Input stream, used to get the options.
+	* @param OutputInterface $output Output stream, used to print messages.
+	* @return int 0 if the board is up to date, 1 if it is not and 2 if an error occured.
+	* @throws \RuntimeException
+	*/
+	protected function execute(InputInterface $input, OutputInterface $output)
+	{
+		$io = new SymfonyStyle($input, $output);
+
+		$recheck = true;
+		if ($input->getOption('cache'))
+		{
+			$recheck = false;
+		}
+
+		$stability = null;
+		if ($input->getOption('stability'))
+		{
+			$stability = $input->getOption('stability');
+			if (!($stability == 'stable') && !($stability == 'unstable'))
+			{
+				$io->error($this->language->lang('CLI_ERROR_INVALID_STABILITY', $stability));
+				return 3;
+			}
+		}
+
+		$ext_name = $input->getArgument('ext-name');
+		if ($ext_name != null)
+		{
+			if ($ext_name == 'all')
+			{
+				return $this->check_all_ext($io, $stability, $recheck);
+			}
+			else
+			{
+				return $this->check_ext($input, $io, $stability, $recheck, $ext_name);
+			}
+		}
+		else
+		{
+			return $this->check_core($input, $io, $stability, $recheck);
+		}
+	}
+
+	/**
+	 * Check if a given extension is up to date
+	 *
+	 * @param InputInterface	$input		Input stream, used to get the options.
+	 * @param SymfonyStyle		$io			IO handler, for formatted and unified IO
+	 * @param string			$stability	Force a given stability
+	 * @param bool				$recheck	Disallow the use of the cache
+	 * @param string			$ext_name	The extension name
+	 * @return int
+	 */
+	protected function check_ext(InputInterface $input, SymfonyStyle $io, $stability, $recheck, $ext_name)
+	{
+		try
+		{
+			$ext_manager = $this->phpbb_container->get('ext.manager');
+			$md_manager = $ext_manager->create_extension_metadata_manager($ext_name);
+			$updates_available = $ext_manager->version_check($md_manager, $recheck, false, $stability);
+
+			$metadata = $md_manager->get_metadata('all');
+			if ($input->getOption('verbose'))
+			{
+				$io->title($md_manager->get_metadata('display-name'));
+
+				$io->note($this->language->lang('CURRENT_VERSION') . $this->language->lang('COLON') . ' ' . $metadata['version']);
+			}
+
+			if (!empty($updates_available))
+			{
+				if ($input->getOption('verbose'))
+				{
+					$io->caution($this->language->lang('NOT_UP_TO_DATE', $metadata['name']));
+
+					$this->display_versions($io, $updates_available);
+				}
+
+				return 1;
+			}
+			else
+			{
+				if ($input->getOption('verbose'))
+				{
+					$io->success($this->language->lang('UPDATE_NOT_NEEDED'));
+				}
+
+				return 0;
+			}
+		}
+		catch (\RuntimeException $e)
+		{
+			$io->error($this->language->lang('EXTENSION_NOT_INSTALLED', $ext_name));
+
+			return 1;
+		}
+	}
+
+	/**
+	 * Check if the core is up to date
+	 *
+	 * @param InputInterface	$input		Input stream, used to get the options.
+	 * @param SymfonyStyle		$io			IO handler, for formatted and unified IO
+	 * @param string			$stability	Force a given stability
+	 * @param bool				$recheck	Disallow the use of the cache
+	 * @return int
+	 */
+	protected function check_core(InputInterface $input, SymfonyStyle $io, $stability, $recheck)
+	{
+		$version_helper = $this->phpbb_container->get('version_helper');
+		$version_helper->force_stability($stability);
+
+		$updates_available = $version_helper->get_suggested_updates($recheck);
+
+		if ($input->getOption('verbose'))
+		{
+			$io->title('phpBB core');
+
+			$io->note( $this->language->lang('CURRENT_VERSION') . $this->language->lang('COLON') . ' ' . $this->config['version']);
+		}
+
+		if (!empty($updates_available))
+		{
+			$io->caution($this->language->lang('UPDATE_NEEDED'));
+
+			if ($input->getOption('verbose'))
+			{
+				$this->display_versions($io, $updates_available);
+			}
+
+			return 1;
+		}
+		else
+		{
+			if ($input->getOption('verbose'))
+			{
+				$io->success($this->language->lang('UPDATE_NOT_NEEDED'));
+			}
+
+			return 0;
+		}
+	}
+
+	/**
+	* Check if all the available extensions are up to date
+	*
+	* @param SymfonyStyle	$io			IO handler, for formatted and unified IO
+	* @param bool			$recheck	Disallow the use of the cache
+	* @return int
+	*/
+	protected function check_all_ext(SymfonyStyle $io, $stability, $recheck)
+	{
+		/** @var \phpbb\extension\manager $ext_manager */
+		$ext_manager = $this->phpbb_container->get('ext.manager');
+
+		$rows = [];
+
+		foreach ($ext_manager->all_available() as $ext_name => $ext_path)
+		{
+			$row = [];
+			$row[] = sprintf("<info>%s</info>", $ext_name);
+			$md_manager = $ext_manager->create_extension_metadata_manager($ext_name);
+			try
+			{
+				$metadata = $md_manager->get_metadata('all');
+				if (isset($metadata['extra']['version-check']))
+				{
+					try {
+						$updates_available = $ext_manager->version_check($md_manager, $recheck, false, $stability);
+						if (!empty($updates_available))
+						{
+							$versions = array_map(function($entry)
+							{
+								return $entry['current'];
+							}, $updates_available);
+
+							$row[] = sprintf("<comment>%s</comment>", $metadata['version']);
+							$row[] = implode(', ', $versions);
+						}
+						else
+						{
+							$row[] = sprintf("<info>%s</info>", $metadata['version']);
+							$row[] = '';
+						}
+					} catch (\RuntimeException $e) {
+						$row[] = $metadata['version'];
+						$row[] = '';
+					}
+				}
+				else
+				{
+					$row[] = $metadata['version'];
+					$row[] = '';
+				}
+			}
+			catch (exception_interface $e)
+			{
+				$exception_message = call_user_func_array(array($this->user, 'lang'), array_merge(array($e->getMessage()), $e->get_parameters()));
+				$row[] = '<error>' . $exception_message . '</error>';
+			}
+			catch (\RuntimeException $e)
+			{
+				$row[] = '<error>' . $e->getMessage() . '</error>';
+			}
+
+			$rows[] = $row;
+		}
+
+		$io->table([
+			$this->language->lang('EXTENSION_NAME'),
+			$this->language->lang('CURRENT_VERSION'),
+			$this->language->lang('LATEST_VERSION'),
+		], $rows);
+
+		return 0;
+	}
+
+	/**
+	* Display the details of the available updates
+	*
+	* @param SymfonyStyle	$io					IO handler, for formatted and unified IO
+	* @param array			$updates_available	The list of the available updates
+	*/
+	protected function display_versions(SymfonyStyle $io, $updates_available)
+	{
+		$io->section($this->language->lang('UPDATES_AVAILABLE'));
+
+		$rows = [];
+		foreach ($updates_available as $version_data)
+		{
+			$row = ['', '', ''];
+			$row[0] = $version_data['current'];
+
+			if (isset($version_data['announcement']))
+			{
+				$row[1] = $version_data['announcement'];
+			}
+
+			if (isset($version_data['download']))
+			{
+				$row[2] = $version_data['download'];
+			}
+
+			$rows[] = $row;
+		}
+
+		$io->table([
+			$this->language->lang('VERSION'),
+			$this->language->lang('ANNOUNCEMENT_TOPIC'),
+			$this->language->lang('DOWNLOAD_LATEST'),
+		], $rows);
+	}
+}
diff --git a/phpBB/phpbb/console/command/user/activate.php b/phpBB/phpbb/console/command/user/activate.php
new file mode 100644
index 0000000000..9c85718b4c
--- /dev/null
+++ b/phpBB/phpbb/console/command/user/activate.php
@@ -0,0 +1,218 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\console\command\user;
+
+use phpbb\config\config;
+use phpbb\console\command\command;
+use phpbb\db\driver\driver_interface;
+use phpbb\language\language;
+use phpbb\log\log_interface;
+use phpbb\notification\manager;
+use phpbb\user;
+use phpbb\user_loader;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Input\InputOption;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
+
+class activate extends command
+{
+	/** @var driver_interface */
+	protected $db;
+
+	/** @var config */
+	protected $config;
+
+	/** @var language */
+	protected $language;
+
+	/** @var log_interface */
+	protected $log;
+
+	/** @var manager */
+	protected $notifications;
+
+	/** @var user_loader */
+	protected $user_loader;
+
+	/**
+	 * phpBB root path
+	 *
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * PHP extension.
+	 *
+	 * @var string
+	 */
+	protected $php_ext;
+
+	/**
+	 * Construct method
+	 *
+	 * @param user             $user
+	 * @param driver_interface $db
+	 * @param config           $config
+	 * @param language         $language
+	 * @param log_interface    $log
+	 * @param manager          $notifications
+	 * @param user_loader      $user_loader
+	 * @param string           $phpbb_root_path
+	 * @param string           $php_ext
+	 */
+	public function __construct(user $user, driver_interface $db, config $config, language $language, log_interface $log, manager $notifications, user_loader $user_loader, $phpbb_root_path, $php_ext)
+	{
+		$this->db = $db;
+		$this->config = $config;
+		$this->language = $language;
+		$this->log = $log;
+		$this->notifications = $notifications;
+		$this->user_loader = $user_loader;
+		$this->phpbb_root_path = $phpbb_root_path;
+		$this->php_ext = $php_ext;
+
+		$this->language->add_lang('acp/users');
+		parent::__construct($user);
+	}
+
+	/**
+	 * Sets the command name and description
+	 *
+	 * @return null
+	 */
+	protected function configure()
+	{
+		$this
+			->setName('user:activate')
+			->setDescription($this->language->lang('CLI_DESCRIPTION_USER_ACTIVATE'))
+			->setHelp($this->language->lang('CLI_HELP_USER_ACTIVATE'))
+			->addArgument(
+				'username',
+				InputArgument::REQUIRED,
+				$this->language->lang('CLI_DESCRIPTION_USER_ACTIVATE_USERNAME')
+			)
+			->addOption(
+				'deactivate',
+				'd',
+				InputOption::VALUE_NONE,
+				$this->language->lang('CLI_DESCRIPTION_USER_ACTIVATE_DEACTIVATE')
+			)
+			->addOption(
+				'send-email',
+				null,
+				InputOption::VALUE_NONE,
+				$this->language->lang('CLI_DESCRIPTION_USER_ADD_OPTION_NOTIFY')
+			)
+		;
+	}
+
+	/**
+	 * Executes the command user:activate
+	 *
+	 * Activate (or deactivate) a user account
+	 *
+	 * @param InputInterface  $input  The input stream used to get the options
+	 * @param OutputInterface $output The output stream, used to print messages
+	 *
+	 * @return int 0 if all is well, 1 if any errors occurred
+	 */
+	protected function execute(InputInterface $input, OutputInterface $output)
+	{
+		$io = new SymfonyStyle($input, $output);
+
+		$name = $input->getArgument('username');
+		$mode = ($input->getOption('deactivate')) ? 'deactivate' : 'activate';
+
+		$user_id  = $this->user_loader->load_user_by_username($name);
+		$user_row = $this->user_loader->get_user($user_id);
+
+		if ($user_row['user_id'] == ANONYMOUS)
+		{
+			$io->error($this->language->lang('NO_USER'));
+			return 1;
+		}
+
+		// Check if the user is already active (or inactive)
+		if ($mode == 'activate' && $user_row['user_type'] != USER_INACTIVE)
+		{
+			$io->error($this->language->lang('CLI_DESCRIPTION_USER_ACTIVATE_ACTIVE'));
+			return 1;
+		}
+		else if ($mode == 'deactivate' && $user_row['user_type'] == USER_INACTIVE)
+		{
+			$io->error($this->language->lang('CLI_DESCRIPTION_USER_ACTIVATE_INACTIVE'));
+			return 1;
+		}
+
+		// Activate the user account
+		if (!function_exists('user_active_flip'))
+		{
+			require($this->phpbb_root_path . 'includes/functions_user.' . $this->php_ext);
+		}
+
+		user_active_flip($mode, $user_row['user_id']);
+
+		// Notify the user upon activation
+		if ($mode == 'activate' && $this->config['require_activation'] == USER_ACTIVATION_ADMIN)
+		{
+			$this->send_notification($user_row, $input);
+		}
+
+		// Log and display the result
+		$msg = ($mode == 'activate') ? 'USER_ADMIN_ACTIVATED' : 'USER_ADMIN_DEACTIVED';
+		$log = ($mode == 'activate') ? 'LOG_USER_ACTIVE' : 'LOG_USER_INACTIVE';
+
+		$this->log->add('admin', ANONYMOUS, '', $log, false, array($user_row['username']));
+		$this->log->add('user', ANONYMOUS, '', $log . '_USER', false, array(
+			'reportee_id' => $user_row['user_id']
+		));
+
+		$io->success($this->language->lang($msg));
+
+		return 0;
+	}
+
+	/**
+	 * Send account activation notification to user
+	 *
+	 * @param array           $user_row The user data array
+	 * @param InputInterface  $input    The input stream used to get the options
+	 * @return null
+	 */
+	protected function send_notification($user_row, InputInterface $input)
+	{
+		$this->notifications->delete_notifications('notification.type.admin_activate_user', $user_row['user_id']);
+
+		if ($input->getOption('send-email'))
+		{
+			if (!class_exists('messenger'))
+			{
+				require($this->phpbb_root_path . 'includes/functions_messenger.' . $this->php_ext);
+			}
+
+			$messenger = new \messenger(false);
+			$messenger->template('admin_welcome_activated', $user_row['user_lang']);
+			$messenger->set_addresses($user_row);
+			$messenger->anti_abuse_headers($this->config, $this->user);
+			$messenger->assign_vars(array(
+					'USERNAME'	=> htmlspecialchars_decode($user_row['username']))
+			);
+
+			$messenger->send(NOTIFY_EMAIL);
+		}
+	}
+}
diff --git a/phpBB/phpbb/console/command/user/add.php b/phpBB/phpbb/console/command/user/add.php
new file mode 100644
index 0000000000..c60a059251
--- /dev/null
+++ b/phpBB/phpbb/console/command/user/add.php
@@ -0,0 +1,334 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\console\command\user;
+
+use phpbb\config\config;
+use phpbb\console\command\command;
+use phpbb\db\driver\driver_interface;
+use phpbb\exception\runtime_exception;
+use phpbb\language\language;
+use phpbb\passwords\manager;
+use phpbb\user;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Input\InputOption;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Question\Question;
+use Symfony\Component\Console\Style\SymfonyStyle;
+
+class add extends command
+{
+	/** @var array Array of interactively acquired options */
+	protected $data;
+
+	/** @var driver_interface */
+	protected $db;
+
+	/** @var config */
+	protected $config;
+
+	/** @var language */
+	protected $language;
+
+	/** @var manager */
+	protected $password_manager;
+
+	/**
+	 * phpBB root path
+	 *
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * PHP extension.
+	 *
+	 * @var string
+	 */
+	protected $php_ext;
+
+	/**
+	 * Construct method
+	 *
+	 * @param user             $user
+	 * @param driver_interface $db
+	 * @param config           $config
+	 * @param language         $language
+	 * @param manager          $password_manager
+	 * @param string           $phpbb_root_path
+	 * @param string           $php_ext
+	 */
+	public function __construct(user $user, driver_interface $db, config $config, language $language, manager $password_manager, $phpbb_root_path, $php_ext)
+	{
+		$this->db = $db;
+		$this->config = $config;
+		$this->language = $language;
+		$this->password_manager = $password_manager;
+		$this->phpbb_root_path = $phpbb_root_path;
+		$this->php_ext = $php_ext;
+
+		$this->language->add_lang('ucp');
+		parent::__construct($user);
+	}
+
+	/**
+	 * Sets the command name and description
+	 *
+	 * @return null
+	 */
+	protected function configure()
+	{
+		$this
+			->setName('user:add')
+			->setDescription($this->language->lang('CLI_DESCRIPTION_USER_ADD'))
+			->setHelp($this->language->lang('CLI_HELP_USER_ADD'))
+			->addOption(
+				'username',
+				'U',
+				InputOption::VALUE_REQUIRED,
+				$this->language->lang('CLI_DESCRIPTION_USER_ADD_OPTION_USERNAME')
+			)
+			->addOption(
+				'password',
+				'P',
+				InputOption::VALUE_REQUIRED,
+				$this->language->lang('CLI_DESCRIPTION_USER_ADD_OPTION_PASSWORD')
+			)
+			->addOption(
+				'email',
+				'E',
+				InputOption::VALUE_REQUIRED,
+				$this->language->lang('CLI_DESCRIPTION_USER_ADD_OPTION_EMAIL')
+			)
+			->addOption(
+				'send-email',
+				null,
+				InputOption::VALUE_NONE,
+				$this->language->lang('CLI_DESCRIPTION_USER_ADD_OPTION_NOTIFY')
+			)
+		;
+	}
+
+	/**
+	 * Executes the command user:add
+	 *
+	 * Adds a new user to the database. If options are not provided, it will ask for the username, password and email.
+	 * User is added to the registered user group. Language and timezone default to $config settings.
+	 *
+	 * @param InputInterface  $input  The input stream used to get the options
+	 * @param OutputInterface $output The output stream, used to print messages
+	 *
+	 * @return int 0 if all is well, 1 if any errors occurred
+	 */
+	protected function execute(InputInterface $input, OutputInterface $output)
+	{
+		$io = new SymfonyStyle($input, $output);
+
+		try
+		{
+			$this->validate_user_data();
+			$group_id = $this->get_group_id();
+		}
+		catch (runtime_exception $e)
+		{
+			$io->error($e->getMessage());
+			return 1;
+		}
+
+		$user_row = array(
+			'username'      => $this->data['username'],
+			'user_password' => $this->password_manager->hash($this->data['new_password']),
+			'user_email'    => $this->data['email'],
+			'group_id'      => $group_id,
+			'user_timezone' => $this->config['board_timezone'],
+			'user_lang'     => $this->config['default_lang'],
+			'user_type'     => USER_NORMAL,
+			'user_regdate'  => time(),
+		);
+
+		$user_id = (int) user_add($user_row);
+
+		if (!$user_id)
+		{
+			$io->error($this->language->lang('AUTH_NO_PROFILE_CREATED'));
+			return 1;
+		}
+
+		if ($input->getOption('send-email') && $this->config['email_enable'])
+		{
+			$this->send_activation_email($user_id);
+		}
+
+		$io->success($this->language->lang('CLI_USER_ADD_SUCCESS', $this->data['username']));
+
+		return 0;
+	}
+
+	/**
+	 * Interacts with the user.
+	 *
+	 * @param InputInterface  $input  An InputInterface instance
+	 * @param OutputInterface $output An OutputInterface instance
+	 */
+	protected function interact(InputInterface $input, OutputInterface $output)
+	{
+		$helper = $this->getHelper('question');
+
+		$this->data = array(
+			'username'     => $input->getOption('username'),
+			'new_password' => $input->getOption('password'),
+			'email'        => $input->getOption('email'),
+		);
+
+		if (!$this->data['username'])
+		{
+			$question = new Question($this->ask_user('USERNAME'));
+			$this->data['username'] = $helper->ask($input, $output, $question);
+		}
+
+		if (!$this->data['new_password'])
+		{
+			$question = new Question($this->ask_user('PASSWORD'));
+			$question->setValidator(function ($value) use ($helper, $input, $output) {
+				$question = new Question($this->ask_user('CONFIRM_PASSWORD'));
+				$question->setHidden(true);
+				if ($helper->ask($input, $output, $question) != $value)
+				{
+					throw new runtime_exception($this->language->lang('NEW_PASSWORD_ERROR'));
+				}
+				return $value;
+			});
+			$question->setHidden(true);
+			$question->setMaxAttempts(5);
+
+			$this->data['new_password'] = $helper->ask($input, $output, $question);
+		}
+
+		if (!$this->data['email'])
+		{
+			$question = new Question($this->ask_user('EMAIL_ADDRESS'));
+			$this->data['email'] = $helper->ask($input, $output, $question);
+		}
+	}
+
+	/**
+	 * Validate the submitted user data
+	 *
+	 * @throws runtime_exception if any data fails validation
+	 * @return null
+	 */
+	protected function validate_user_data()
+	{
+		if (!function_exists('validate_data'))
+		{
+			require($this->phpbb_root_path . 'includes/functions_user.' . $this->php_ext);
+		}
+
+		$error = validate_data($this->data, array(
+			'username'     => array(
+				array('string', false, $this->config['min_name_chars'], $this->config['max_name_chars']),
+				array('username', '')),
+			'new_password' => array(
+				array('string', false, $this->config['min_pass_chars'], $this->config['max_pass_chars']),
+				array('password')),
+			'email'        => array(
+				array('string', false, 6, 60),
+				array('user_email')),
+		));
+
+		if ($error)
+		{
+			throw new runtime_exception(implode("\n", array_map(array($this->language, 'lang'), $error)));
+		}
+	}
+
+	/**
+	 * Get the group id
+	 *
+	 * Go and find in the database the group_id corresponding to 'REGISTERED'
+	 *
+	 * @throws runtime_exception if the group id does not exist in database.
+	 * @return null
+	 */
+	protected function get_group_id()
+	{
+		$sql = 'SELECT group_id
+			FROM ' . GROUPS_TABLE . "
+			WHERE group_name = '" . $this->db->sql_escape('REGISTERED') . "'
+				AND group_type = " . GROUP_SPECIAL;
+		$result = $this->db->sql_query($sql);
+		$row = $this->db->sql_fetchrow($result);
+		$this->db->sql_freeresult($result);
+
+		if (!$row || !$row['group_id'])
+		{
+			throw new runtime_exception($this->language->lang('NO_GROUP'));
+		}
+
+		return $row['group_id'];
+	}
+
+	/**
+	 * Send account activation email
+	 *
+	 * @param int   $user_id The new user's id
+	 * @return null
+	 */
+	protected function send_activation_email($user_id)
+	{
+		switch ($this->config['require_activation'])
+		{
+			case USER_ACTIVATION_SELF:
+				$email_template = 'user_welcome_inactive';
+				$user_actkey = gen_rand_string(mt_rand(6, 10));
+			break;
+			case USER_ACTIVATION_ADMIN:
+				$email_template = 'admin_welcome_inactive';
+				$user_actkey = gen_rand_string(mt_rand(6, 10));
+			break;
+			default:
+				$email_template = 'user_welcome';
+				$user_actkey = '';
+			break;
+		}
+
+		if (!class_exists('messenger'))
+		{
+			require($this->phpbb_root_path . 'includes/functions_messenger.' . $this->php_ext);
+		}
+
+		$messenger = new \messenger(false);
+		$messenger->template($email_template, $this->user->lang_name);
+		$messenger->to($this->data['email'], $this->data['username']);
+		$messenger->anti_abuse_headers($this->config, $this->user);
+		$messenger->assign_vars(array(
+			'WELCOME_MSG' => htmlspecialchars_decode($this->language->lang('WELCOME_SUBJECT', $this->config['sitename'])),
+			'USERNAME'    => htmlspecialchars_decode($this->data['username']),
+			'PASSWORD'    => htmlspecialchars_decode($this->data['new_password']),
+			'U_ACTIVATE'  => generate_board_url() . "/ucp.{$this->php_ext}?mode=activate&u=$user_id&k=$user_actkey")
+		);
+
+		$messenger->send(NOTIFY_EMAIL);
+	}
+
+	/**
+	 * Helper to translate questions to the user
+	 *
+	 * @param string $key The language key
+	 * @return string The language key translated with a colon and space appended
+	 */
+	protected function ask_user($key)
+	{
+		return $this->language->lang($key) . $this->language->lang('COLON') . ' ';
+	}
+}
diff --git a/phpBB/phpbb/console/command/user/delete.php b/phpBB/phpbb/console/command/user/delete.php
new file mode 100644
index 0000000000..8593541c1a
--- /dev/null
+++ b/phpBB/phpbb/console/command/user/delete.php
@@ -0,0 +1,170 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\console\command\user;
+
+use phpbb\console\command\command;
+use phpbb\db\driver\driver_interface;
+use phpbb\language\language;
+use phpbb\log\log_interface;
+use phpbb\user;
+use phpbb\user_loader;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Input\InputOption;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Question\ConfirmationQuestion;
+use Symfony\Component\Console\Style\SymfonyStyle;
+
+class delete extends command
+{
+	/** @var driver_interface */
+	protected $db;
+
+	/** @var language */
+	protected $language;
+
+	/** @var log_interface */
+	protected $log;
+
+	/** @var user_loader */
+	protected $user_loader;
+
+	/**
+	 * phpBB root path
+	 *
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * PHP extension.
+	 *
+	 * @var string
+	 */
+	protected $php_ext;
+
+	/**
+	 * Construct method
+	 *
+	 * @param user             $user
+	 * @param driver_interface $db
+	 * @param language         $language
+	 * @param log_interface    $log
+	 * @param user_loader      $user_loader
+	 * @param string           $phpbb_root_path
+	 * @param string           $php_ext
+	 */
+	public function __construct(user $user, driver_interface $db, language $language, log_interface $log, user_loader $user_loader, $phpbb_root_path, $php_ext)
+	{
+		$this->db = $db;
+		$this->language = $language;
+		$this->log = $log;
+		$this->user_loader = $user_loader;
+		$this->phpbb_root_path = $phpbb_root_path;
+		$this->php_ext = $php_ext;
+
+		$this->language->add_lang('acp/users');
+		parent::__construct($user);
+	}
+
+	/**
+	 * Sets the command name and description
+	 *
+	 * @return null
+	 */
+	protected function configure()
+	{
+		$this
+			->setName('user:delete')
+			->setDescription($this->language->lang('CLI_DESCRIPTION_USER_DELETE'))
+			->addArgument(
+				'username',
+				InputArgument::REQUIRED,
+				$this->language->lang('CLI_DESCRIPTION_USER_DELETE_USERNAME')
+			)
+			->addOption(
+				'delete-posts',
+				null,
+				InputOption::VALUE_NONE,
+				$this->language->lang('CLI_DESCRIPTION_USER_DELETE_OPTION_POSTS')
+			)
+		;
+	}
+
+	/**
+	 * Executes the command user:delete
+	 *
+	 * Deletes a user from the database. An option to delete the user's posts
+	 * is available, by default posts will be retained.
+	 *
+	 * @param InputInterface  $input  The input stream used to get the options
+	 * @param OutputInterface $output The output stream, used to print messages
+	 *
+	 * @return int 0 if all is well, 1 if any errors occurred
+	 */
+	protected function execute(InputInterface $input, OutputInterface $output)
+	{
+		$name = $input->getArgument('username');
+		$mode = ($input->getOption('delete-posts')) ? 'remove' : 'retain';
+
+		if ($name)
+		{
+			$io = new SymfonyStyle($input, $output);
+
+			$user_id  = $this->user_loader->load_user_by_username($name);
+			$user_row = $this->user_loader->get_user($user_id);
+
+			if ($user_row['user_id'] == ANONYMOUS)
+			{
+				$io->error($this->language->lang('NO_USER'));
+				return 1;
+			}
+
+			if (!function_exists('user_delete'))
+			{
+				require($this->phpbb_root_path . 'includes/functions_user.' . $this->php_ext);
+			}
+
+			user_delete($mode, $user_row['user_id'], $user_row['username']);
+
+			$this->log->add('admin', ANONYMOUS, '', 'LOG_USER_DELETED', false, array($user_row['username']));
+
+			$io->success($this->language->lang('USER_DELETED'));
+		}
+
+		return 0;
+	}
+
+	/**
+	 * Interacts with the user.
+	 * Confirm they really want to delete the account...last chance!
+	 *
+	 * @param InputInterface  $input  An InputInterface instance
+	 * @param OutputInterface $output An OutputInterface instance
+	 */
+	protected function interact(InputInterface $input, OutputInterface $output)
+	{
+		$helper = $this->getHelper('question');
+
+		$question = new ConfirmationQuestion(
+			$this->language->lang('CLI_USER_DELETE_CONFIRM', $input->getArgument('username')),
+			false
+		);
+
+		if (!$helper->ask($input, $output, $question))
+		{
+			$input->setArgument('username', false);
+		}
+	}
+}
diff --git a/phpBB/phpbb/console/command/user/reclean.php b/phpBB/phpbb/console/command/user/reclean.php
new file mode 100644
index 0000000000..1a89f13382
--- /dev/null
+++ b/phpBB/phpbb/console/command/user/reclean.php
@@ -0,0 +1,158 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\console\command\user;
+
+use phpbb\console\command\command;
+use phpbb\db\driver\driver_interface;
+use phpbb\language\language;
+use phpbb\user;
+use Symfony\Component\Console\Helper\ProgressBar;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
+
+class reclean extends command
+{
+	/** @var driver_interface */
+	protected $db;
+
+	/** @var language */
+	protected $language;
+
+	/** @var int A count of the number of re-cleaned user names */
+	protected $processed;
+
+	/** @var ProgressBar */
+	protected $progress;
+
+	/**
+	 * Construct method
+	 *
+	 * @param user             $user
+	 * @param driver_interface $db
+	 * @param language         $language
+	 */
+	public function __construct(user $user, driver_interface $db, language $language)
+	{
+		$this->db = $db;
+		$this->language = $language;
+
+		parent::__construct($user);
+	}
+
+	/**
+	 * Sets the command name and description
+	 *
+	 * @return null
+	 */
+	protected function configure()
+	{
+		$this
+			->setName('user:reclean')
+			->setDescription($this->language->lang('CLI_DESCRIPTION_USER_RECLEAN'))
+			->setHelp($this->language->lang('CLI_HELP_USER_RECLEAN'))
+		;
+	}
+
+	/**
+	 * Executes the command user:reclean
+	 *
+	 * Cleans user names that are unclean.
+	 *
+	 * @param InputInterface  $input  The input stream used to get the options
+	 * @param OutputInterface $output The output stream, used to print messages
+	 *
+	 * @return int 0 if all is well, 1 if any errors occurred
+	 */
+	protected function execute(InputInterface $input, OutputInterface $output)
+	{
+		$io = new SymfonyStyle($input, $output);
+
+		$io->section($this->language->lang('CLI_USER_RECLEAN_START'));
+
+		$this->processed = 0;
+
+		$this->progress = $this->create_progress_bar($this->get_count(), $io, $output);
+		$this->progress->setMessage($this->language->lang('CLI_USER_RECLEAN_START'));
+		$this->progress->start();
+
+		$stage = 0;
+		while ($stage !== true)
+		{
+			$stage = $this->reclean_usernames($stage);
+		}
+
+		$this->progress->finish();
+
+		$io->newLine(2);
+		$io->success($this->language->lang('CLI_USER_RECLEAN_DONE', $this->processed));
+
+		return 0;
+	}
+
+	/**
+	 * Re-clean user names
+	 * Only user names that are unclean will be re-cleaned
+	 *
+	 * @param int $start An offset index
+	 * @return bool|int Return the next offset index or true if all records have been processed.
+	 */
+	protected function reclean_usernames($start = 0)
+	{
+		$limit = 500;
+		$i = 0;
+
+		$this->db->sql_transaction('begin');
+
+		$sql = 'SELECT user_id, username, username_clean FROM ' . USERS_TABLE;
+		$result = $this->db->sql_query_limit($sql, $limit, $start);
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			$i++;
+			$username_clean = $this->db->sql_escape(utf8_clean_string($row['username']));
+
+			if ($username_clean != $row['username_clean'])
+			{
+				$sql = 'UPDATE ' . USERS_TABLE . "
+					SET username_clean = '$username_clean'
+					WHERE user_id = {$row['user_id']}";
+				$this->db->sql_query($sql);
+
+				$this->processed++;
+			}
+
+			$this->progress->advance();
+		}
+		$this->db->sql_freeresult($result);
+
+		$this->db->sql_transaction('commit');
+
+		return ($i < $limit) ? true : $start + $i;
+	}
+
+	/**
+	 * Get the count of users in the database
+	 *
+	 * @return int
+	 */
+	protected function get_count()
+	{
+		$sql = 'SELECT COUNT(user_id) AS count FROM ' . USERS_TABLE;
+		$result = $this->db->sql_query($sql);
+		$count = (int) $this->db->sql_fetchfield('count');
+		$this->db->sql_freeresult($result);
+
+		return $count;
+	}
+}
diff --git a/phpBB/phpbb/console/exception_subscriber.php b/phpBB/phpbb/console/exception_subscriber.php
new file mode 100644
index 0000000000..b240993203
--- /dev/null
+++ b/phpBB/phpbb/console/exception_subscriber.php
@@ -0,0 +1,65 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\console;
+
+use phpbb\exception\exception_interface;
+use Symfony\Component\Console\ConsoleEvents;
+use Symfony\Component\Console\Event\ConsoleExceptionEvent;
+use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+
+class exception_subscriber implements EventSubscriberInterface
+{
+	/**
+	 * @var \phpbb\language\language
+	 */
+	protected $language;
+
+	/**
+	 * Construct method
+	 *
+	 * @param \phpbb\language\language $language Language object
+	 */
+	public function __construct(\phpbb\language\language $language)
+	{
+		$this->language = $language;
+	}
+
+	/**
+	 * This listener is run when the ConsoleEvents::EXCEPTION event is triggered.
+	 * It translate the exception message. If din debug mode the original exception is embedded.
+	 *
+	 * @param ConsoleExceptionEvent $event
+	 */
+	public function on_exception(ConsoleExceptionEvent $event)
+	{
+		$original_exception = $event->getException();
+
+		if ($original_exception instanceof exception_interface)
+		{
+			$parameters = array_merge(array($original_exception->getMessage()), $original_exception->get_parameters());
+			$message = call_user_func_array(array($this->language, 'lang'), $parameters);
+
+			$exception = new \RuntimeException($message , $original_exception->getCode(), $original_exception);
+
+			$event->setException($exception);
+		}
+	}
+
+	static public function getSubscribedEvents()
+	{
+		return array(
+			ConsoleEvents::EXCEPTION => 'on_exception',
+		);
+	}
+}
diff --git a/phpBB/phpbb/content_visibility.php b/phpBB/phpbb/content_visibility.php
index bf7dc2c703..f023e0742c 100644
--- a/phpBB/phpbb/content_visibility.php
+++ b/phpBB/phpbb/content_visibility.php
@@ -131,6 +131,42 @@ class content_visibility
 		return (int) $data[$mode . '_approved'] + (int) $data[$mode . '_unapproved'] + (int) $data[$mode . '_softdeleted'];
 	}
 
+
+	/**
+	* Check topic/post visibility for a given forum ID
+	*
+	* Note: Read permissions are not checked.
+	*
+	* @param $mode		string	Either "topic" or "post"
+	* @param $forum_id	int		The forum id is used for permission checks
+	* @param $data		array	Array with item information to check visibility
+	* @return bool		True if the item is visible, false if not
+	*/
+	public function is_visible($mode, $forum_id, $data)
+	{
+		$is_visible = $this->auth->acl_get('m_approve', $forum_id) || $data[$mode . '_visibility'] == ITEM_APPROVED;
+
+		/**
+		* Allow changing the result of calling is_visible
+		*
+		* @event core.phpbb_content_visibility_is_visible
+		* @var	bool		is_visible			Default visibility condition, to be modified by extensions if needed.
+		* @var	string		mode				Either "topic" or "post"
+		* @var	int			forum_id			Forum id of the current item
+		* @var	array		data				Array of item information
+		* @since 3.2.2-RC1
+		*/
+		$vars = array(
+			'is_visible',
+			'mode',
+			'forum_id',
+			'data',
+		);
+		extract($this->phpbb_dispatcher->trigger_event('core.phpbb_content_visibility_is_visible', compact($vars)));
+
+		return $is_visible;
+	}
+
 	/**
 	* Create topic/post visibility SQL for a given forum ID
 	*
@@ -176,10 +212,14 @@ class content_visibility
 
 		if ($this->auth->acl_get('m_approve', $forum_id))
 		{
-			return $where_sql . '1 = 1';
+			$where_sql .= '1 = 1';
+		}
+		else
+		{
+			$where_sql .= $table_alias . $mode . '_visibility = ' . ITEM_APPROVED;
 		}
 
-		return $where_sql . $table_alias . $mode . '_visibility = ' . ITEM_APPROVED;
+		return '(' . $where_sql . ')';
 	}
 
 	/**
@@ -195,16 +235,21 @@ class content_visibility
 	*/
 	public function get_forums_visibility_sql($mode, $forum_ids = array(), $table_alias = '')
 	{
-		$where_sql = '(';
+		$where_sql = '';
 
-		$approve_forums = array_intersect($forum_ids, array_keys($this->auth->acl_getf('m_approve', true)));
+		$approve_forums = array_keys($this->auth->acl_getf('m_approve', true));
+		if (!empty($forum_ids) && !empty($approve_forums))
+		{
+			$approve_forums = array_intersect($forum_ids, $approve_forums);
+			$forum_ids = array_diff($forum_ids, $approve_forums);
+		}
 
 		$get_forums_visibility_sql_overwrite = false;
 		/**
 		* Allow changing the result of calling get_forums_visibility_sql
 		*
 		* @event core.phpbb_content_visibility_get_forums_visibility_before
-		* @var	string		where_sql							The action the user tried to execute
+		* @var	string		where_sql							Extra visibility conditions. It must end with either an SQL "AND" or an "OR"
 		* @var	string		mode								Either "topic" or "post" depending on the query this is being used in
 		* @var	array		forum_ids							Array of forum ids which the posts/topics are limited to
 		* @var	string		table_alias							Table alias to prefix in SQL queries
@@ -229,33 +274,13 @@ class content_visibility
 			return $get_forums_visibility_sql_overwrite;
 		}
 
-		if (sizeof($approve_forums))
-		{
-			// Remove moderator forums from the rest
-			$forum_ids = array_diff($forum_ids, $approve_forums);
-
-			if (!sizeof($forum_ids))
-			{
-				// The user can see all posts/topics in all specified forums
-				return $where_sql . $this->db->sql_in_set($table_alias . 'forum_id', $approve_forums) . ')';
-			}
-			else
-			{
-				// Moderator can view all posts/topics in some forums
-				$where_sql .= $this->db->sql_in_set($table_alias . 'forum_id', $approve_forums) . ' OR ';
-			}
-		}
-		else
-		{
-			// The user is just a normal user
-			return $where_sql . $table_alias . $mode . '_visibility = ' . ITEM_APPROVED . '
-				AND ' . $this->db->sql_in_set($table_alias . 'forum_id', $forum_ids, false, true) . ')';
-		}
-
+		// Moderator can view all posts/topics in the moderated forums
+		$where_sql .= '(' . $this->db->sql_in_set($table_alias . 'forum_id', $approve_forums, false, true) . ' OR ';
+		// Normal user can view approved items only
 		$where_sql .= '(' . $table_alias . $mode . '_visibility = ' . ITEM_APPROVED . '
-			AND ' . $this->db->sql_in_set($table_alias . 'forum_id', $forum_ids) . '))';
+			AND ' . $this->db->sql_in_set($table_alias . 'forum_id', $forum_ids, false, true) . '))';
 
-		return $where_sql;
+		return '(' . $where_sql . ')';
 	}
 
 	/**
@@ -281,12 +306,12 @@ class content_visibility
 		* Allow changing the result of calling get_global_visibility_sql
 		*
 		* @event core.phpbb_content_visibility_get_global_visibility_before
-		* @var	array		where_sqls							The action the user tried to execute
+		* @var	array		where_sqls							Array of extra visibility conditions. Will be joined by imploding with "OR".
 		* @var	string		mode								Either "topic" or "post" depending on the query this is being used in
 		* @var	array		exclude_forum_ids					Array of forum ids the current user doesn't have access to
 		* @var	string		table_alias							Table alias to prefix in SQL queries
 		* @var	array		approve_forums						Array of forums where the user has m_approve permissions
-		* @var	string		visibility_sql_overwrite	Forces the function to return an implosion of where_sqls (joined by "OR")
+		* @var	string		visibility_sql_overwrite			If not empty, forces the function to return visibility_sql_overwrite after executing the event
 		* @since 3.1.3-RC1
 		*/
 		$vars = array(
@@ -304,24 +329,17 @@ class content_visibility
 			return $visibility_sql_overwrite;
 		}
 
-		if (sizeof($exclude_forum_ids))
-		{
-			$where_sqls[] = '(' . $this->db->sql_in_set($table_alias . 'forum_id', $exclude_forum_ids, true) . '
-				AND ' . $table_alias . $mode . '_visibility = ' . ITEM_APPROVED . ')';
-		}
-		else
-		{
-			$where_sqls[] = $table_alias . $mode . '_visibility = ' . ITEM_APPROVED;
-		}
+		// Include approved items in all forums but the excluded
+		$where_sqls[] = '(' . $this->db->sql_in_set($table_alias . 'forum_id', $exclude_forum_ids, true, true) . '
+			AND ' . $table_alias . $mode . '_visibility = ' . ITEM_APPROVED . ')';
 
-		if (sizeof($approve_forums))
+		// If user has moderator permissions, add everything in the moderated forums
+		if (count($approve_forums))
 		{
 			$where_sqls[] = $this->db->sql_in_set($table_alias . 'forum_id', $approve_forums);
-			return '(' . implode(' OR ', $where_sqls) . ')';
 		}
 
-		// There is only one element, so we just return that one
-		return $where_sqls[0];
+		return '(' . implode(' OR ', $where_sqls) . ')';
 	}
 
 	/**
@@ -437,12 +455,13 @@ class content_visibility
 		 * @var			int			topic_id		Topic of the post IDs to be modified.
 		 * @var			int			forum_id		Forum ID that the topic_id resides in.
 		 * @var			int			user_id			User ID doing this action.
-		 * @var			int			timestamp		Timestamp of this action.
+		 * @var			int			time			Timestamp of this action.
 		 * @var			string		reason			Reason specified by the user for this change.
 		 * @var			bool		is_starter		Are we changing the topic's starter?
 		 * @var			bool		is_latest		Are we changing the topic's latest post?
 		 * @var			array		data			The data array for this action.
 		 * @since 3.1.10-RC1
+		 * @changed 3.2.2-RC1 Use time instead of non-existent timestamp
 		 */
 		$vars = array(
 			'visibility',
@@ -450,7 +469,7 @@ class content_visibility
 			'topic_id',
 			'forum_id',
 			'user_id',
-			'timestamp',
+			'time',
 			'reason',
 			'is_starter',
 			'is_latest',
@@ -565,7 +584,7 @@ class content_visibility
 				$sql_ary[$recipient_field] = " + $count_increase";
 			}
 
-			if (sizeof($sql_ary))
+			if (count($sql_ary))
 			{
 				$forum_sql = array();
 
@@ -622,12 +641,13 @@ class content_visibility
 		 * @var			int			topic_id		Topic of the post IDs to be modified.
 		 * @var			int			forum_id		Forum ID that the topic_id resides in.
 		 * @var			int			user_id			User ID doing this action.
-		 * @var			int			timestamp		Timestamp of this action.
+		 * @var			int			time			Timestamp of this action.
 		 * @var			string		reason			Reason specified by the user for this change.
 		 * @var			bool		is_starter		Are we changing the topic's starter?
 		 * @var			bool		is_latest		Are we changing the topic's latest post?
 		 * @var			array		data			The data array for this action.
 		 * @since 3.1.10-RC1
+		 * @changed 3.2.2-RC1 Use time instead of non-existent timestamp
 		 */
 		$vars = array(
 			'visibility',
@@ -635,7 +655,7 @@ class content_visibility
 			'topic_id',
 			'forum_id',
 			'user_id',
-			'timestamp',
+			'time',
 			'reason',
 			'is_starter',
 			'is_latest',
@@ -709,18 +729,19 @@ class content_visibility
 		 * @var			int			topic_id			Topic of the post IDs to be modified.
 		 * @var			int			forum_id			Forum ID that the topic_id resides in.
 		 * @var			int			user_id				User ID doing this action.
-		 * @var			int			timestamp			Timestamp of this action.
+		 * @var			int			time				Timestamp of this action.
 		 * @var			string		reason				Reason specified by the user for this change.
 		 * @var			bool		force_update_all	Force an update on all posts within the topic, regardless of their current approval state.
 		 * @var			array		data				The data array for this action.
 		 * @since 3.1.10-RC1
+		 * @changed 3.2.2-RC1 Use time instead of non-existent timestamp
 		 */
 		$vars = array(
 			'visibility',
 			'topic_id',
 			'forum_id',
 			'user_id',
-			'timestamp',
+			'time',
 			'reason',
 			'force_update_all',
 			'data',
@@ -758,18 +779,19 @@ class content_visibility
 		 * @var			int			topic_id			Topic of the post IDs to be modified.
 		 * @var			int			forum_id			Forum ID that the topic_id resides in.
 		 * @var			int			user_id				User ID doing this action.
-		 * @var			int			timestamp			Timestamp of this action.
+		 * @var			int			time				Timestamp of this action.
 		 * @var			string		reason				Reason specified by the user for this change.
 		 * @var			bool		force_update_all	Force an update on all posts within the topic, regardless of their current approval state.
 		 * @var			array		data				The data array for this action.
 		 * @since 3.1.10-RC1
+		 * @changed 3.2.2-RC1 Use time instead of non-existent timestamp
 		 */
 		$vars = array(
 			'visibility',
 			'topic_id',
 			'forum_id',
 			'user_id',
-			'timestamp',
+			'time',
 			'reason',
 			'force_update_all',
 			'data',
diff --git a/phpBB/phpbb/controller/exception.php b/phpBB/phpbb/controller/exception.php
index 437558b06a..e227c7c37b 100644
--- a/phpBB/phpbb/controller/exception.php
+++ b/phpBB/phpbb/controller/exception.php
@@ -16,6 +16,6 @@ namespace phpbb\controller;
 /**
 * Controller exception class
 */
-class exception extends \RuntimeException
+class exception extends \phpbb\exception\runtime_exception
 {
 }
diff --git a/phpBB/phpbb/controller/helper.php b/phpBB/phpbb/controller/helper.php
index ce6bfba981..664b4f4e0f 100644
--- a/phpBB/phpbb/controller/helper.php
+++ b/phpBB/phpbb/controller/helper.php
@@ -15,9 +15,7 @@ namespace phpbb\controller;
 
 use Symfony\Component\HttpFoundation\JsonResponse;
 use Symfony\Component\HttpFoundation\Response;
-use Symfony\Component\Routing\Generator\UrlGenerator;
 use Symfony\Component\Routing\Generator\UrlGeneratorInterface;
-use Symfony\Component\Routing\RequestContext;
 
 /**
 * Controller helper class, contains methods that do things for controllers
@@ -49,49 +47,28 @@ class helper
 	protected $request;
 
 	/**
-	* @var \phpbb\filesystem The filesystem object
-	*/
-	protected $filesystem;
-
-	/**
-	* phpBB root path
-	* @var string
-	*/
-	protected $phpbb_root_path;
-
-	/**
-	* PHP file extension
-	* @var string
-	*/
-	protected $php_ext;
+	 * @var \phpbb\routing\helper
+	 */
+	protected $routing_helper;
 
 	/**
-	* Constructor
-	*
-	* @param \phpbb\template\template $template Template object
-	* @param \phpbb\user $user User object
-	* @param \phpbb\config\config $config Config object
+	 * Constructor
 	 *
-	 * @param \phpbb\controller\provider $provider Path provider
-	* @param \phpbb\extension\manager $manager Extension manager object
-	* @param \phpbb\symfony_request $symfony_request Symfony Request object
-	* @param \phpbb\request\request_interface $request phpBB request object
-	* @param \phpbb\filesystem $filesystem The filesystem object
-	* @param string $phpbb_root_path phpBB root path
-	* @param string $php_ext PHP file extension
-	*/
-	public function __construct(\phpbb\template\template $template, \phpbb\user $user, \phpbb\config\config $config, \phpbb\controller\provider $provider, \phpbb\extension\manager $manager, \phpbb\symfony_request $symfony_request, \phpbb\request\request_interface $request, \phpbb\filesystem $filesystem, $phpbb_root_path, $php_ext)
+	 * @param \phpbb\template\template $template Template object
+	 * @param \phpbb\user $user User object
+	 * @param \phpbb\config\config $config Config object
+	 * @param \phpbb\symfony_request $symfony_request Symfony Request object
+	 * @param \phpbb\request\request_interface $request phpBB request object
+	 * @param \phpbb\routing\helper $routing_helper Helper to generate the routes
+	 */
+	public function __construct(\phpbb\template\template $template, \phpbb\user $user, \phpbb\config\config $config, \phpbb\symfony_request $symfony_request, \phpbb\request\request_interface $request, \phpbb\routing\helper $routing_helper)
 	{
 		$this->template = $template;
 		$this->user = $user;
 		$this->config = $config;
 		$this->symfony_request = $symfony_request;
 		$this->request = $request;
-		$this->filesystem = $filesystem;
-		$this->phpbb_root_path = $phpbb_root_path;
-		$this->php_ext = $php_ext;
-		$provider->find_routing_files($manager->get_finder());
-		$this->route_collection = $provider->find($phpbb_root_path)->get_routes();
+		$this->routing_helper = $routing_helper;
 	}
 
 	/**
@@ -134,70 +111,7 @@ class helper
 	*/
 	public function route($route, array $params = array(), $is_amp = true, $session_id = false, $reference_type = UrlGeneratorInterface::ABSOLUTE_PATH)
 	{
-		$anchor = '';
-		if (isset($params['#']))
-		{
-			$anchor = '#' . $params['#'];
-			unset($params['#']);
-		}
-
-		$context = new RequestContext();
-		$context->fromRequest($this->symfony_request);
-
-		if ($this->config['force_server_vars'])
-		{
-			$context->setHost($this->config['server_name']);
-			$context->setScheme(substr($this->config['server_protocol'], 0, -3));
-			$context->setHttpPort($this->config['server_port']);
-			$context->setHttpsPort($this->config['server_port']);
-			$context->setBaseUrl(rtrim($this->config['script_path'], '/'));
-		}
-
-		$script_name = $this->symfony_request->getScriptName();
-		$page_name = substr($script_name, -1, 1) == '/' ? '' : utf8_basename($script_name);
-
-		$base_url = $context->getBaseUrl();
-
-		// Append page name if base URL does not contain it
-		if (!empty($page_name) && strpos($base_url, '/' . $page_name) === false)
-		{
-			$base_url .= '/' . $page_name;
-		}
-
-		// If enable_mod_rewrite is false we need to replace the current front-end by app.php, otherwise we need to remove it.
-		$base_url = str_replace('/' . $page_name, empty($this->config['enable_mod_rewrite']) ? '/app.' . $this->php_ext : '', $base_url);
-
-		// We need to update the base url to move to the directory of the app.php file if the current script is not app.php
-		if ($page_name !== 'app.php' && !$this->config['force_server_vars'])
-		{
-			if (empty($this->config['enable_mod_rewrite']))
-			{
-				$base_url = str_replace('/app.' . $this->php_ext, '/' . $this->phpbb_root_path . 'app.' . $this->php_ext, $base_url);
-			}
-			else
-			{
-				$base_url .= preg_replace(get_preg_expression('path_remove_dot_trailing_slash'), '$2', $this->phpbb_root_path);
-			}
-		}
-
-		$base_url = $this->request->escape($this->filesystem->clean_path($base_url), true);
-
-		$context->setBaseUrl($base_url);
-
-		$url_generator = new UrlGenerator($this->route_collection, $context);
-		$route_url = $url_generator->generate($route, $params, $reference_type);
-
-		if ($is_amp)
-		{
-			$route_url = str_replace(array('&amp;', '&'), array('&', '&amp;'), $route_url);
-		}
-
-		if ($reference_type === UrlGeneratorInterface::RELATIVE_PATH && empty($this->config['enable_mod_rewrite']))
-		{
-			$route_url = 'app.' . $this->php_ext . '/' . $route_url;
-		}
-
-		return append_sid($route_url . $anchor, false, $is_amp, $session_id, true);
+		return $this->routing_helper->route($route, $params, $is_amp, $session_id, $reference_type);
 	}
 
 	/**
@@ -256,6 +170,20 @@ class helper
 	}
 
 	/**
+	 * Assigns automatic refresh time meta tag in template
+	 *
+	 * @param	int		$time	time in seconds, when redirection should occur
+	 * @param	string	$url	the URL where the user should be redirected
+	 * @return	null
+	 */
+	public function assign_meta_refresh_var($time, $url)
+	{
+		$this->template->assign_vars(array(
+			'META' => '<meta http-equiv="refresh" content="' . $time . '; url=' . $url . '" />',
+		));
+	}
+
+	/**
 	* Return the current url
 	*
 	* @return string
diff --git a/phpBB/phpbb/controller/provider.php b/phpBB/phpbb/controller/provider.php
deleted file mode 100644
index 7e26848290..0000000000
--- a/phpBB/phpbb/controller/provider.php
+++ /dev/null
@@ -1,92 +0,0 @@
-<?php
-/**
-*
-* This file is part of the phpBB Forum Software package.
-*
-* @copyright (c) phpBB Limited <https://www.phpbb.com>
-* @license GNU General Public License, version 2 (GPL-2.0)
-*
-* For full copyright and license information, please see
-* the docs/CREDITS.txt file.
-*
-*/
-
-namespace phpbb\controller;
-
-use Symfony\Component\Routing\RouteCollection;
-use Symfony\Component\Routing\Loader\YamlFileLoader;
-use Symfony\Component\Config\FileLocator;
-
-/**
-* Controller interface
-*/
-class provider
-{
-	/**
-	* YAML file(s) containing route information
-	* @var array
-	*/
-	protected $routing_files;
-
-	/**
-	* Collection of the routes in phpBB and all found extensions
-	* @var RouteCollection
-	*/
-	protected $routes;
-
-	/**
-	* Construct method
-	*
-	* @param array $routing_files Array of strings containing paths
-	*							to YAML files holding route information
-	*/
-	public function __construct($routing_files = array())
-	{
-		$this->routing_files = $routing_files;
-	}
-
-	/**
-	* Find the list of routing files
-	*
-	* @param \phpbb\finder $finder
-	* @return null
-	*/
-	public function find_routing_files(\phpbb\finder $finder)
-	{
-		// We hardcode the path to the core config directory
-		// because the finder cannot find it
-		$this->routing_files = array_merge($this->routing_files, array('config/routing.yml'), array_keys($finder
-				->directory('/config')
-				->suffix('routing.yml')
-				->find()
-		));
-	}
-
-	/**
-	* Find a list of controllers
-	*
-	* @param string $base_path Base path to prepend to file paths
-	* @return provider
-	*/
-	public function find($base_path = '')
-	{
-		$this->routes = new RouteCollection;
-		foreach ($this->routing_files as $file_path)
-		{
-			$loader = new YamlFileLoader(new FileLocator(phpbb_realpath($base_path)));
-			$this->routes->addCollection($loader->load($file_path));
-		}
-
-		return $this;
-	}
-
-	/**
-	* Get the list of routes
-	*
-	* @return RouteCollection Get the route collection
-	*/
-	public function get_routes()
-	{
-		return $this->routes;
-	}
-}
diff --git a/phpBB/phpbb/controller/resolver.php b/phpBB/phpbb/controller/resolver.php
index 948a6a218c..f8dffc12de 100644
--- a/phpBB/phpbb/controller/resolver.php
+++ b/phpBB/phpbb/controller/resolver.php
@@ -23,12 +23,6 @@ use Symfony\Component\HttpFoundation\Request;
 class resolver implements ControllerResolverInterface
 {
 	/**
-	* User object
-	* @var \phpbb\user
-	*/
-	protected $user;
-
-	/**
 	* ContainerInterface object
 	* @var ContainerInterface
 	*/
@@ -55,14 +49,12 @@ class resolver implements ControllerResolverInterface
 	/**
 	* Construct method
 	*
-	* @param \phpbb\user $user User Object
 	* @param ContainerInterface $container ContainerInterface object
 	* @param string $phpbb_root_path Relative path to phpBB root
 	* @param \phpbb\template\template $template
 	*/
-	public function __construct(\phpbb\user $user, ContainerInterface $container, $phpbb_root_path, \phpbb\template\template $template = null)
+	public function __construct(ContainerInterface $container, $phpbb_root_path, \phpbb\template\template $template = null)
 	{
-		$this->user = $user;
 		$this->container = $container;
 		$this->template = $template;
 		$this->type_cast_helper = new \phpbb\request\type_cast_helper();
@@ -82,20 +74,20 @@ class resolver implements ControllerResolverInterface
 
 		if (!$controller)
 		{
-			throw new \phpbb\controller\exception($this->user->lang['CONTROLLER_NOT_SPECIFIED']);
+			throw new \phpbb\controller\exception('CONTROLLER_NOT_SPECIFIED');
 		}
 
 		// Require a method name along with the service name
 		if (stripos($controller, ':') === false)
 		{
-			throw new \phpbb\controller\exception($this->user->lang['CONTROLLER_METHOD_NOT_SPECIFIED']);
+			throw new \phpbb\controller\exception('CONTROLLER_METHOD_NOT_SPECIFIED');
 		}
 
 		list($service, $method) = explode(':', $controller);
 
 		if (!$this->container->has($service))
 		{
-			throw new \phpbb\controller\exception($this->user->lang('CONTROLLER_SERVICE_UNDEFINED', $service));
+			throw new \phpbb\controller\exception('CONTROLLER_SERVICE_UNDEFINED', array($service));
 		}
 
 		$controller_object = $this->container->get($service);
@@ -134,9 +126,21 @@ class resolver implements ControllerResolverInterface
 	*/
 	public function getArguments(Request $request, $controller)
 	{
-		// At this point, $controller contains the object and method name
-		list($object, $method) = $controller;
-		$mirror = new \ReflectionMethod($object, $method);
+		// At this point, $controller should be a callable
+		if (is_array($controller))
+		{
+			list($object, $method) = $controller;
+			$mirror = new \ReflectionMethod($object, $method);
+		}
+		else if (is_object($controller) && !$controller instanceof \Closure)
+		{
+			$mirror = new \ReflectionObject($controller);
+			$mirror = $mirror->getMethod('__invoke');
+		}
+		else
+		{
+			$mirror = new \ReflectionFunction($controller);
+		}
 
 		$arguments = array();
 		$parameters = $mirror->getParameters();
@@ -166,7 +170,7 @@ class resolver implements ControllerResolverInterface
 			}
 			else
 			{
-				throw new \phpbb\controller\exception($this->user->lang('CONTROLLER_ARGUMENT_VALUE_MISSING', $param->getPosition() + 1, get_class($object) . ':' . $method, $param->name));
+				throw new \phpbb\controller\exception('CONTROLLER_ARGUMENT_VALUE_MISSING', array($param->getPosition() + 1, get_class($object) . ':' . $method, $param->name));
 			}
 		}
 
diff --git a/phpBB/phpbb/cron/task/core/prune_all_forums.php b/phpBB/phpbb/cron/task/core/prune_all_forums.php
index b47939ccbe..5005f5b894 100644
--- a/phpBB/phpbb/cron/task/core/prune_all_forums.php
+++ b/phpBB/phpbb/cron/task/core/prune_all_forums.php
@@ -55,21 +55,26 @@ class prune_all_forums extends \phpbb\cron\task\base
 			include($this->phpbb_root_path . 'includes/functions_admin.' . $this->php_ext);
 		}
 
-		$sql = 'SELECT forum_id, prune_next, enable_prune, prune_days, prune_viewed, forum_flags, prune_freq
-			FROM ' . FORUMS_TABLE . "
-			WHERE enable_prune = 1
-				AND prune_next < " . time();
+		$sql = 'SELECT forum_id, prune_next, enable_prune, prune_days, prune_viewed, enable_shadow_prune, prune_shadow_days, prune_shadow_freq, prune_shadow_next, forum_flags, prune_freq
+			FROM ' . FORUMS_TABLE;
 		$result = $this->db->sql_query($sql);
 		while ($row = $this->db->sql_fetchrow($result))
 		{
-			if ($row['prune_days'])
+			if ($row['enable_prune'] && $row['prune_next'] < time())
 			{
-				auto_prune($row['forum_id'], 'posted', $row['forum_flags'], $row['prune_days'], $row['prune_freq']);
-			}
+				if ($row['prune_days'])
+				{
+					auto_prune($row['forum_id'], 'posted', $row['forum_flags'], $row['prune_days'], $row['prune_freq']);
+				}
 
-			if ($row['prune_viewed'])
+				if ($row['prune_viewed'])
+				{
+					auto_prune($row['forum_id'], 'viewed', $row['forum_flags'], $row['prune_viewed'], $row['prune_freq']);
+				}
+			}
+			if ($row['enable_shadow_prune'] && $row['prune_shadow_next'] < time() && $row['prune_shadow_days'])
 			{
-				auto_prune($row['forum_id'], 'viewed', $row['forum_flags'], $row['prune_viewed'], $row['prune_freq']);
+				auto_prune($row['forum_id'], 'shadow', $row['forum_flags'], $row['prune_shadow_days'], $row['prune_shadow_freq']);
 			}
 		}
 		$this->db->sql_freeresult($result);
diff --git a/phpBB/phpbb/cron/task/core/prune_forum.php b/phpBB/phpbb/cron/task/core/prune_forum.php
index ba68565197..abf91aee19 100644
--- a/phpBB/phpbb/cron/task/core/prune_forum.php
+++ b/phpBB/phpbb/cron/task/core/prune_forum.php
@@ -31,7 +31,7 @@ class prune_forum extends \phpbb\cron\task\base implements \phpbb\cron\task\para
 	* If $forum_data is given, it is assumed to contain necessary information
 	* about a single forum that is to be pruned.
 	*
-	* If $forum_data is not given, forum id will be retrieved via request_var
+	* If $forum_data is not given, forum id will be retrieved via $request->variable()
 	* and a database query will be performed to load the necessary information
 	* about the forum.
 	*/
diff --git a/phpBB/phpbb/cron/task/core/prune_shadow_topics.php b/phpBB/phpbb/cron/task/core/prune_shadow_topics.php
index 97a4b0ea86..0ab59f9ed5 100644
--- a/phpBB/phpbb/cron/task/core/prune_shadow_topics.php
+++ b/phpBB/phpbb/cron/task/core/prune_shadow_topics.php
@@ -33,7 +33,7 @@ class prune_shadow_topics extends \phpbb\cron\task\base implements \phpbb\cron\t
 	* If $forum_data is given, it is assumed to contain necessary information
 	* about a single forum that is to be pruned.
 	*
-	* If $forum_data is not given, forum id will be retrieved via request_var
+	* If $forum_data is not given, forum id will be retrieved via $request->variable()
 	* and a database query will be performed to load the necessary information
 	* about the forum.
 	*/
diff --git a/phpBB/phpbb/cron/task/core/queue.php b/phpBB/phpbb/cron/task/core/queue.php
index a9345a44df..eca69a5041 100644
--- a/phpBB/phpbb/cron/task/core/queue.php
+++ b/phpBB/phpbb/cron/task/core/queue.php
@@ -20,20 +20,23 @@ class queue extends \phpbb\cron\task\base
 {
 	protected $phpbb_root_path;
 	protected $php_ext;
+	protected $cache_dir;
 	protected $config;
 
 	/**
-	* Constructor.
-	*
-	* @param string $phpbb_root_path The root path
-	* @param string $php_ext PHP file extension
-	* @param \phpbb\config\config $config The config
-	*/
-	public function __construct($phpbb_root_path, $php_ext, \phpbb\config\config $config)
+	 * Constructor.
+	 *
+	 * @param string $phpbb_root_path The root path
+	 * @param string $php_ext PHP file extension
+	 * @param \phpbb\config\config $config The config
+	 * @param string $cache_dir phpBB cache directory
+	 */
+	public function __construct($phpbb_root_path, $php_ext, \phpbb\config\config $config, $cache_dir)
 	{
 		$this->phpbb_root_path = $phpbb_root_path;
 		$this->php_ext = $php_ext;
 		$this->config = $config;
+		$this->cache_dir = $cache_dir;
 	}
 
 	/**
@@ -60,7 +63,7 @@ class queue extends \phpbb\cron\task\base
 	*/
 	public function is_runnable()
 	{
-		return file_exists($this->phpbb_root_path . 'cache/queue.' . $this->php_ext);
+		return file_exists($this->cache_dir . 'queue.' . $this->php_ext);
 	}
 
 	/**
diff --git a/phpBB/phpbb/cron/task/core/tidy_plupload.php b/phpBB/phpbb/cron/task/core/tidy_plupload.php
index b6aeecf4b4..37d0e9b21a 100644
--- a/phpBB/phpbb/cron/task/core/tidy_plupload.php
+++ b/phpBB/phpbb/cron/task/core/tidy_plupload.php
@@ -42,6 +42,12 @@ class tidy_plupload extends \phpbb\cron\task\base
 	*/
 	protected $config;
 
+	/** @var \phpbb\log\log_interface */
+	protected $log;
+
+	/** @var \phpbb\user */
+	protected $user;
+
 	/**
 	* Directory where plupload stores temporary files.
 	* @var string
@@ -53,11 +59,15 @@ class tidy_plupload extends \phpbb\cron\task\base
 	*
 	* @param string $phpbb_root_path The root path
 	* @param \phpbb\config\config $config The config
+	* @param \phpbb\log\log_interface $log Log
+	* @param \phpbb\user $user User object
 	*/
-	public function __construct($phpbb_root_path, \phpbb\config\config $config)
+	public function __construct($phpbb_root_path, \phpbb\config\config $config, \phpbb\log\log_interface $log, \phpbb\user $user)
 	{
 		$this->phpbb_root_path = $phpbb_root_path;
 		$this->config = $config;
+		$this->log = $log;
+		$this->user = $user;
 
 		$this->plupload_upload_path = $this->phpbb_root_path . $this->config['upload_path'] . '/plupload';
 	}
@@ -88,13 +98,11 @@ class tidy_plupload extends \phpbb\cron\task\base
 		}
 		catch (\UnexpectedValueException $e)
 		{
-			add_log(
-				'critical',
-				'LOG_PLUPLOAD_TIDY_FAILED',
+			$this->log->add('critical', $this->user->data['user_id'], $this->user->ip, 'LOG_PLUPLOAD_TIDY_FAILED', false, array(
 				$this->plupload_upload_path,
 				$e->getMessage(),
 				$e->getTraceAsString()
-			);
+			));
 		}
 
 		$this->config->set('plupload_last_gc', time(), true);
diff --git a/phpBB/phpbb/cron/task/core/update_hashes.php b/phpBB/phpbb/cron/task/core/update_hashes.php
index a4fe477d99..ba095abc8b 100644
--- a/phpBB/phpbb/cron/task/core/update_hashes.php
+++ b/phpBB/phpbb/cron/task/core/update_hashes.php
@@ -111,9 +111,9 @@ class update_hashes extends \phpbb\cron\task\base
 				// Increase number so we know that users were selected from the database
 				$affected_rows++;
 
-				$sql = 'UPDATE ' . USERS_TABLE . '
-					SET user_password = "' . $this->db->sql_escape($new_hash) . '"
-					WHERE user_id = ' . (int) $row['user_id'];
+				$sql = 'UPDATE ' . USERS_TABLE . "
+					SET user_password = '" . $this->db->sql_escape($new_hash) . "'
+					WHERE user_id = " . (int) $row['user_id'];
 				$this->db->sql_query($sql);
 			}
 
diff --git a/phpBB/phpbb/cron/task/text_reparser/reparser.php b/phpBB/phpbb/cron/task/text_reparser/reparser.php
new file mode 100644
index 0000000000..fa3bc67325
--- /dev/null
+++ b/phpBB/phpbb/cron/task/text_reparser/reparser.php
@@ -0,0 +1,168 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\cron\task\text_reparser;
+
+/**
+ * Reparse text cron task
+ */
+class reparser extends \phpbb\cron\task\base
+{
+	const MIN = 1;
+	const SIZE = 100;
+
+	/**
+	 * @var \phpbb\config\config
+	 */
+	protected $config;
+
+	/**
+	 * @var \phpbb\config\db_text
+	 */
+	protected $config_text;
+
+	/**
+	 * @var \phpbb\lock\db
+	 */
+	protected $reparse_lock;
+
+	/**
+	 * @var \phpbb\textreparser\manager
+	 */
+	protected $reparser_manager;
+
+	/**
+	 * @var string
+	 */
+	protected $reparser_name;
+
+	/**
+	 * @var \phpbb\di\service_collection
+	 */
+	protected $reparsers;
+
+	/**
+	 * @var array
+	 */
+	protected $resume_data;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\config\config			$config
+	 * @param \phpbb\config\db_text			$config_text
+	 * @param \phpbb\lock\db				$reparse_lock
+	 * @param \phpbb\textreparser\manager	$reparser_manager
+	 * @param \phpbb\di\service_collection	$reparsers
+	 */
+	public function __construct(\phpbb\config\config $config, \phpbb\config\db_text $config_text, \phpbb\lock\db $reparse_lock, \phpbb\textreparser\manager $reparser_manager, \phpbb\di\service_collection $reparsers)
+	{
+		$this->config = $config;
+		$this->config_text = $config_text;
+		$this->reparse_lock = $reparse_lock;
+		$this->reparser_manager = $reparser_manager;
+		$this->reparsers = $reparsers;
+	}
+
+	/**
+	 * Sets the reparser for this cron task
+	 *
+	 * @param string	$reparser
+	 */
+	public function set_reparser($reparser)
+	{
+		$this->reparser_name = !isset($this->reparsers[$reparser]) ? $this->reparser_manager->find_reparser($reparser) : $reparser;
+
+		if ($this->resume_data === null)
+		{
+			$this->resume_data = $this->reparser_manager->get_resume_data($this->reparser_name);
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function is_runnable()
+	{
+		if ($this->resume_data === null)
+		{
+			$this->resume_data = $this->reparser_manager->get_resume_data($this->reparser_name);
+		}
+
+		if (!isset($this->resume_data['range-max']) || $this->resume_data['range-max'] >= $this->resume_data['range-min'])
+		{
+			return true;
+		}
+
+		return false;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function should_run()
+	{
+		if (!empty($this->config['reparse_lock']))
+		{
+			$last_run = explode(' ', $this->config['reparse_lock']);
+
+			if ($last_run[0] + 3600 >= time())
+			{
+				return false;
+			}
+		}
+
+		if ($this->config[$this->reparser_name . '_cron_interval'])
+		{
+			return $this->config[$this->reparser_name . '_last_cron'] < time() - $this->config[$this->reparser_name . '_cron_interval'];
+		}
+
+		return false;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		if ($this->reparse_lock->acquire())
+		{
+			if ($this->resume_data === null)
+			{
+				$this->resume_data = $this->reparser_manager->get_resume_data($this->reparser_name);
+			}
+
+			/**
+			 * @var \phpbb\textreparser\reparser_interface $reparser
+			 */
+			$reparser = $this->reparsers[$this->reparser_name];
+
+			$min = isset($this->resume_data['range-min']) ? $this->resume_data['range-min'] : self::MIN;
+			$current = isset($this->resume_data['range-max']) ? $this->resume_data['range-max'] : $reparser->get_max_id();
+			$size = isset($this->resume_data['range-size']) ? $this->resume_data['range-size'] : self::SIZE;
+
+			if ($current >= $min)
+			{
+				$start = max($min, $current + 1 - $size);
+				$end = max($min, $current);
+
+				$reparser->reparse_range($start, $end);
+
+				$this->reparser_manager->update_resume_data($this->reparser_name, $min, $start - 1, $size);
+			}
+
+			$this->config->set($this->reparser_name . '_last_cron', time());
+			$this->reparse_lock->release();
+		}
+	}
+}
diff --git a/phpBB/phpbb/datetime.php b/phpBB/phpbb/datetime.php
index 63cdba90fd..4b799b6219 100644
--- a/phpBB/phpbb/datetime.php
+++ b/phpBB/phpbb/datetime.php
@@ -60,6 +60,12 @@ class datetime extends \DateTime
 	public function format($format = '', $force_absolute = false)
 	{
 		$format		= $format ? $format : $this->user->date_format;
+
+		if (substr($this->user->lang_name, 0,2) != 'en')
+		{
+			$format = preg_replace('/([^\\\])S/','$1', $format);
+		}
+
 		$format		= self::format_cache($format, $this->user);
 		$relative	= ($format['is_short'] && !$force_absolute);
 		$now		= new self($this->user, 'now', $this->user->timezone);
diff --git a/phpBB/phpbb/db/driver/driver.php b/phpBB/phpbb/db/driver/driver.php
index 01dd66cd6e..a36ce8c0d7 100644
--- a/phpBB/phpbb/db/driver/driver.php
+++ b/phpBB/phpbb/db/driver/driver.php
@@ -66,6 +66,15 @@ abstract class driver implements driver_interface
 	*/
 	var $sql_server_version = false;
 
+	const LOGICAL_OP = 0;
+	const STATEMENTS = 1;
+	const LEFT_STMT = 0;
+	const COMPARE_OP = 1;
+	const RIGHT_STMT = 2;
+	const SUBQUERY_OP = 3;
+	const SUBQUERY_SELECT_TYPE = 4;
+	const SUBQUERY_BUILD = 5;
+
 	/**
 	* Constructor
 	*/
@@ -271,7 +280,7 @@ abstract class driver implements driver_interface
 			$query_id = $this->query_result;
 		}
 
-		if ($query_id !== false)
+		if ($query_id)
 		{
 			$result = array();
 			while ($row = $this->sql_fetchrow($query_id))
@@ -302,7 +311,7 @@ abstract class driver implements driver_interface
 			return $cache->sql_rowseek($rownum, $query_id);
 		}
 
-		if ($query_id === false)
+		if (!$query_id)
 		{
 			return false;
 		}
@@ -310,7 +319,7 @@ abstract class driver implements driver_interface
 		$this->sql_freeresult($query_id);
 		$query_id = $this->sql_query($this->last_query_text);
 
-		if ($query_id === false)
+		if (!$query_id)
 		{
 			return false;
 		}
@@ -339,7 +348,7 @@ abstract class driver implements driver_interface
 			$query_id = $this->query_result;
 		}
 
-		if ($query_id !== false)
+		if ($query_id)
 		{
 			if ($rownum !== false)
 			{
@@ -363,8 +372,8 @@ abstract class driver implements driver_interface
 	*/
 	function sql_like_expression($expression)
 	{
-		$expression = utf8_str_replace(array('_', '%'), array("\_", "\%"), $expression);
-		$expression = utf8_str_replace(array(chr(0) . "\_", chr(0) . "\%"), array('_', '%'), $expression);
+		$expression = str_replace(array('_', '%'), array("\_", "\%"), $expression);
+		$expression = str_replace(array(chr(0) . "\_", chr(0) . "\%"), array('_', '%'), $expression);
 
 		return $this->_sql_like_expression('LIKE \'' . $this->sql_escape($expression) . '\'');
 	}
@@ -374,8 +383,8 @@ abstract class driver implements driver_interface
 	*/
 	function sql_not_like_expression($expression)
 	{
-		$expression = utf8_str_replace(array('_', '%'), array("\_", "\%"), $expression);
-		$expression = utf8_str_replace(array(chr(0) . "\_", chr(0) . "\%"), array('_', '%'), $expression);
+		$expression = str_replace(array('_', '%'), array("\_", "\%"), $expression);
+		$expression = str_replace(array(chr(0) . "\_", chr(0) . "\%"), array('_', '%'), $expression);
 
 		return $this->_sql_not_like_expression('NOT LIKE \'' . $this->sql_escape($expression) . '\'');
 	}
@@ -528,7 +537,9 @@ abstract class driver implements driver_interface
 	*/
 	function sql_in_set($field, $array, $negate = false, $allow_empty_set = false)
 	{
-		if (!sizeof($array))
+		$array = (array) $array;
+
+		if (!count($array))
 		{
 			if (!$allow_empty_set)
 			{
@@ -550,12 +561,7 @@ abstract class driver implements driver_interface
 			}
 		}
 
-		if (!is_array($array))
-		{
-			$array = array($array);
-		}
-
-		if (sizeof($array) == 1)
+		if (count($array) == 1)
 		{
 			@reset($array);
 			$var = current($array);
@@ -623,7 +629,7 @@ abstract class driver implements driver_interface
 	*/
 	function sql_multi_insert($table, $sql_ary)
 	{
-		if (!sizeof($sql_ary))
+		if (!count($sql_ary))
 		{
 			return false;
 		}
@@ -729,7 +735,7 @@ abstract class driver implements driver_interface
 				// We run the following code to determine if we need to re-order the table array. ;)
 				// The reason for this is that for multi-aliased tables (two equal tables) in the FROM statement the last table need to match the first comparison.
 				// DBMS who rely on this: Oracle, PostgreSQL and MSSQL. For all other DBMS it makes absolutely no difference in which order the table is.
-				if (!empty($array['LEFT_JOIN']) && sizeof($array['FROM']) > 1 && $used_multi_alias !== false)
+				if (!empty($array['LEFT_JOIN']) && count($array['FROM']) > 1 && $used_multi_alias !== false)
 				{
 					// Take first LEFT JOIN
 					$join = current($array['LEFT_JOIN']);
@@ -774,7 +780,18 @@ abstract class driver implements driver_interface
 
 				if (!empty($array['WHERE']))
 				{
-					$sql .= ' WHERE ' . $this->_sql_custom_build('WHERE', $array['WHERE']);
+					$sql .= ' WHERE ';
+
+					if (is_array($array['WHERE']))
+					{
+						$sql_where = $this->_process_boolean_tree_first($array['WHERE']);
+					}
+					else
+					{
+						$sql_where = $array['WHERE'];
+					}
+
+					$sql .= $this->_sql_custom_build('WHERE', $sql_where);
 				}
 
 				if (!empty($array['GROUP_BY']))
@@ -793,6 +810,131 @@ abstract class driver implements driver_interface
 		return $sql;
 	}
 
+
+	protected function _process_boolean_tree_first($operations_ary)
+	{
+		// In cases where an array exists but there is no head condition,
+		// it should be because there's only 1 WHERE clause. This seems the best way to deal with it.
+		if ($operations_ary[self::LOGICAL_OP] !== 'AND' &&
+			$operations_ary[self::LOGICAL_OP] !== 'OR')
+		{
+			$operations_ary = array('AND', array($operations_ary));
+		}
+		return $this->_process_boolean_tree($operations_ary) . "\n";
+	}
+
+	protected function _process_boolean_tree($operations_ary)
+	{
+		$operation = $operations_ary[self::LOGICAL_OP];
+
+		foreach ($operations_ary[self::STATEMENTS] as &$condition)
+		{
+			switch ($condition[self::LOGICAL_OP])
+			{
+				case 'AND':
+				case 'OR':
+
+					$condition = ' ( ' . $this->_process_boolean_tree($condition) . ') ';
+
+				break;
+				case 'NOT':
+
+					$condition = ' NOT (' . $this->_process_boolean_tree($condition) . ') ';
+
+				break;
+
+				default:
+
+					switch (count($condition))
+					{
+						case 3:
+
+							// Typical 3 element clause with {left hand} {operator} {right hand}
+							switch ($condition[self::COMPARE_OP])
+							{
+								case 'IN':
+								case 'NOT_IN':
+
+									// As this is used with an IN, assume it is a set of elements for sql_in_set()
+									$condition = $this->sql_in_set($condition[self::LEFT_STMT], $condition[self::RIGHT_STMT], $condition[self::COMPARE_OP] === 'NOT_IN', true);
+
+								break;
+
+								case 'LIKE':
+
+									$condition = $condition[self::LEFT_STMT] . ' ' . $this->sql_like_expression($condition[self::RIGHT_STMT]) . ' ';
+
+								break;
+
+								case 'NOT_LIKE':
+
+									$condition = $condition[self::LEFT_STMT] . ' ' . $this->sql_not_like_expression($condition[self::RIGHT_STMT]) . ' ';
+
+								break;
+
+								case 'IS_NOT':
+
+									$condition[self::COMPARE_OP] = 'IS NOT';
+
+								// no break
+								case 'IS':
+
+									// If the value is NULL, the string of it is the empty string ('') which is not the intended result.
+									// this should solve that
+									if ($condition[self::RIGHT_STMT] === null)
+									{
+										$condition[self::RIGHT_STMT] = 'NULL';
+									}
+
+									$condition = implode(' ', $condition);
+
+								break;
+
+								default:
+
+									$condition = implode(' ', $condition);
+
+								break;
+							}
+
+						break;
+
+						case 5:
+
+							// Subquery with {left hand} {operator} {compare kind} {SELECT Kind } {Sub Query}
+
+							$result = $condition[self::LEFT_STMT] . ' ' . $condition[self::COMPARE_OP] . ' ' . $condition[self::SUBQUERY_OP] . ' ( ';
+							$result .= $this->sql_build_query($condition[self::SUBQUERY_SELECT_TYPE], $condition[self::SUBQUERY_BUILD]);
+							$result .= ' )';
+							$condition = $result;
+
+						break;
+
+						default:
+							// This is an unpredicted clause setup. Just join all elements.
+							$condition = implode(' ', $condition);
+
+						break;
+					}
+
+				break;
+			}
+
+		}
+
+		if ($operation === 'NOT')
+		{
+			$operations_ary =  implode("", $operations_ary[self::STATEMENTS]);
+		}
+		else
+		{
+			$operations_ary = implode(" \n	$operation ", $operations_ary[self::STATEMENTS]);
+		}
+
+		return $operations_ary;
+	}
+
+
 	/**
 	* {@inheritDoc}
 	*/
@@ -868,7 +1010,7 @@ abstract class driver implements driver_interface
 	*/
 	function sql_report($mode, $query = '')
 	{
-		global $cache, $starttime, $phpbb_root_path, $phpbb_path_helper, $user;
+		global $cache, $starttime, $phpbb_root_path, $phpbb_path_helper;
 		global $request;
 
 		if (is_object($request) && !$request->variable('explain', false))
@@ -994,7 +1136,7 @@ abstract class driver implements driver_interface
 				$html_table = func_get_arg(2);
 				$row = func_get_arg(3);
 
-				if (!$html_table && sizeof($row))
+				if (!$html_table && count($row))
 				{
 					$html_table = true;
 					$this->html_hold .= '<table cellspacing="1"><tr>';
diff --git a/phpBB/phpbb/db/driver/mssql.php b/phpBB/phpbb/db/driver/mssql.php
deleted file mode 100644
index f9ea884ce2..0000000000
--- a/phpBB/phpbb/db/driver/mssql.php
+++ /dev/null
@@ -1,476 +0,0 @@
-<?php
-/**
-*
-* This file is part of the phpBB Forum Software package.
-*
-* @copyright (c) phpBB Limited <https://www.phpbb.com>
-* @license GNU General Public License, version 2 (GPL-2.0)
-*
-* For full copyright and license information, please see
-* the docs/CREDITS.txt file.
-*
-*/
-
-namespace phpbb\db\driver;
-
-/**
-* MSSQL Database Abstraction Layer
-* Minimum Requirement is MSSQL 2000+
-*/
-class mssql extends \phpbb\db\driver\driver
-{
-	var $connect_error = '';
-
-	/**
-	* {@inheritDoc}
-	*/
-	function sql_connect($sqlserver, $sqluser, $sqlpassword, $database, $port = false, $persistency = false, $new_link = false)
-	{
-		if (!function_exists('mssql_connect'))
-		{
-			$this->connect_error = 'mssql_connect function does not exist, is mssql extension installed?';
-			return $this->sql_error('');
-		}
-
-		$this->persistency = $persistency;
-		$this->user = $sqluser;
-		$this->dbname = $database;
-
-		$port_delimiter = (defined('PHP_OS') && substr(PHP_OS, 0, 3) === 'WIN') ? ',' : ':';
-		$this->server = $sqlserver . (($port) ? $port_delimiter . $port : '');
-
-		@ini_set('mssql.charset', 'UTF-8');
-		@ini_set('mssql.textlimit', 2147483647);
-		@ini_set('mssql.textsize', 2147483647);
-
-		$this->db_connect_id = ($this->persistency) ? @mssql_pconnect($this->server, $this->user, $sqlpassword, $new_link) : @mssql_connect($this->server, $this->user, $sqlpassword, $new_link);
-
-		if ($this->db_connect_id && $this->dbname != '')
-		{
-			if (!@mssql_select_db($this->dbname, $this->db_connect_id))
-			{
-				@mssql_close($this->db_connect_id);
-				return false;
-			}
-		}
-
-		return ($this->db_connect_id) ? $this->db_connect_id : $this->sql_error('');
-	}
-
-	/**
-	* {@inheritDoc}
-	*/
-	function sql_server_info($raw = false, $use_cache = true)
-	{
-		global $cache;
-
-		if (!$use_cache || empty($cache) || ($this->sql_server_version = $cache->get('mssql_version')) === false)
-		{
-			$result_id = @mssql_query("SELECT SERVERPROPERTY('productversion'), SERVERPROPERTY('productlevel'), SERVERPROPERTY('edition')", $this->db_connect_id);
-
-			$row = false;
-			if ($result_id)
-			{
-				$row = @mssql_fetch_assoc($result_id);
-				@mssql_free_result($result_id);
-			}
-
-			$this->sql_server_version = ($row) ? trim(implode(' ', $row)) : 0;
-
-			if (!empty($cache) && $use_cache)
-			{
-				$cache->put('mssql_version', $this->sql_server_version);
-			}
-		}
-
-		if ($raw)
-		{
-			return $this->sql_server_version;
-		}
-
-		return ($this->sql_server_version) ? 'MSSQL<br />' . $this->sql_server_version : 'MSSQL';
-	}
-
-	/**
-	* {@inheritDoc}
-	*/
-	public function sql_concatenate($expr1, $expr2)
-	{
-		return $expr1 . ' + ' . $expr2;
-	}
-
-	/**
-	* SQL Transaction
-	* @access private
-	*/
-	function _sql_transaction($status = 'begin')
-	{
-		switch ($status)
-		{
-			case 'begin':
-				return @mssql_query('BEGIN TRANSACTION', $this->db_connect_id);
-			break;
-
-			case 'commit':
-				return @mssql_query('COMMIT TRANSACTION', $this->db_connect_id);
-			break;
-
-			case 'rollback':
-				return @mssql_query('ROLLBACK TRANSACTION', $this->db_connect_id);
-			break;
-		}
-
-		return true;
-	}
-
-	/**
-	* {@inheritDoc}
-	*/
-	function sql_query($query = '', $cache_ttl = 0)
-	{
-		if ($query != '')
-		{
-			global $cache;
-
-			// EXPLAIN only in extra debug mode
-			if (defined('DEBUG'))
-			{
-				$this->sql_report('start', $query);
-			}
-			else if (defined('PHPBB_DISPLAY_LOAD_TIME'))
-			{
-				$this->curtime = microtime(true);
-			}
-
-			$this->query_result = ($cache && $cache_ttl) ? $cache->sql_load($query) : false;
-			$this->sql_add_num_queries($this->query_result);
-
-			if ($this->query_result === false)
-			{
-				if (($this->query_result = @mssql_query($query, $this->db_connect_id)) === false)
-				{
-					$this->sql_error($query);
-				}
-
-				if (defined('DEBUG'))
-				{
-					$this->sql_report('stop', $query);
-				}
-				else if (defined('PHPBB_DISPLAY_LOAD_TIME'))
-				{
-					$this->sql_time += microtime(true) - $this->curtime;
-				}
-
-				if ($cache && $cache_ttl)
-				{
-					$this->open_queries[(int) $this->query_result] = $this->query_result;
-					$this->query_result = $cache->sql_save($this, $query, $this->query_result, $cache_ttl);
-				}
-				else if (strpos($query, 'SELECT') === 0 && $this->query_result)
-				{
-					$this->open_queries[(int) $this->query_result] = $this->query_result;
-				}
-			}
-			else if (defined('DEBUG'))
-			{
-				$this->sql_report('fromcache', $query);
-			}
-		}
-		else
-		{
-			return false;
-		}
-
-		return $this->query_result;
-	}
-
-	/**
-	* Build LIMIT query
-	*/
-	function _sql_query_limit($query, $total, $offset = 0, $cache_ttl = 0)
-	{
-		$this->query_result = false;
-
-		// Since TOP is only returning a set number of rows we won't need it if total is set to 0 (return all rows)
-		if ($total)
-		{
-			// We need to grab the total number of rows + the offset number of rows to get the correct result
-			if (strpos($query, 'SELECT DISTINCT') === 0)
-			{
-				$query = 'SELECT DISTINCT TOP ' . ($total + $offset) . ' ' . substr($query, 15);
-			}
-			else
-			{
-				$query = 'SELECT TOP ' . ($total + $offset) . ' ' . substr($query, 6);
-			}
-		}
-
-		$result = $this->sql_query($query, $cache_ttl);
-
-		// Seek by $offset rows
-		if ($offset)
-		{
-			$this->sql_rowseek($offset, $result);
-		}
-
-		return $result;
-	}
-
-	/**
-	* {@inheritDoc}
-	*/
-	function sql_affectedrows()
-	{
-		return ($this->db_connect_id) ? @mssql_rows_affected($this->db_connect_id) : false;
-	}
-
-	/**
-	* {@inheritDoc}
-	*/
-	function sql_fetchrow($query_id = false)
-	{
-		global $cache;
-
-		if ($query_id === false)
-		{
-			$query_id = $this->query_result;
-		}
-
-		if ($cache && $cache->sql_exists($query_id))
-		{
-			return $cache->sql_fetchrow($query_id);
-		}
-
-		if ($query_id === false)
-		{
-			return false;
-		}
-
-		$row = @mssql_fetch_assoc($query_id);
-
-		// I hope i am able to remove this later... hopefully only a PHP or MSSQL bug
-		if ($row)
-		{
-			foreach ($row as $key => $value)
-			{
-				$row[$key] = ($value === ' ' || $value === null) ? '' : $value;
-			}
-		}
-
-		return $row;
-	}
-
-	/**
-	* {@inheritDoc}
-	*/
-	function sql_rowseek($rownum, &$query_id)
-	{
-		global $cache;
-
-		if ($query_id === false)
-		{
-			$query_id = $this->query_result;
-		}
-
-		if ($cache && $cache->sql_exists($query_id))
-		{
-			return $cache->sql_rowseek($rownum, $query_id);
-		}
-
-		return ($query_id !== false) ? @mssql_data_seek($query_id, $rownum) : false;
-	}
-
-	/**
-	* {@inheritDoc}
-	*/
-	function sql_nextid()
-	{
-		$result_id = @mssql_query('SELECT SCOPE_IDENTITY()', $this->db_connect_id);
-		if ($result_id)
-		{
-			if ($row = @mssql_fetch_assoc($result_id))
-			{
-				@mssql_free_result($result_id);
-				return $row['computed'];
-			}
-			@mssql_free_result($result_id);
-		}
-
-		return false;
-	}
-
-	/**
-	* {@inheritDoc}
-	*/
-	function sql_freeresult($query_id = false)
-	{
-		global $cache;
-
-		if ($query_id === false)
-		{
-			$query_id = $this->query_result;
-		}
-
-		if ($cache && !is_object($query_id) && $cache->sql_exists($query_id))
-		{
-			return $cache->sql_freeresult($query_id);
-		}
-
-		if (isset($this->open_queries[(int) $query_id]))
-		{
-			unset($this->open_queries[(int) $query_id]);
-			return @mssql_free_result($query_id);
-		}
-
-		return false;
-	}
-
-	/**
-	* {@inheritDoc}
-	*/
-	function sql_escape($msg)
-	{
-		return str_replace(array("'", "\0"), array("''", ''), $msg);
-	}
-
-	/**
-	* {@inheritDoc}
-	*/
-	function sql_lower_text($column_name)
-	{
-		return "LOWER(SUBSTRING($column_name, 1, DATALENGTH($column_name)))";
-	}
-
-	/**
-	* Build LIKE expression
-	* @access private
-	*/
-	function _sql_like_expression($expression)
-	{
-		return $expression . " ESCAPE '\\'";
-	}
-
-	/**
-	* Build NOT LIKE expression
-	* @access private
-	*/
-	function _sql_not_like_expression($expression)
-	{
-		return $expression . " ESCAPE '\\'";
-	}
-
-	/**
-	* return sql error array
-	* @access private
-	*/
-	function _sql_error()
-	{
-		if (function_exists('mssql_get_last_message'))
-		{
-			$error = array(
-				'message'	=> @mssql_get_last_message(),
-				'code'		=> '',
-			);
-
-			// Get error code number
-			$result_id = @mssql_query('SELECT @@ERROR as code', $this->db_connect_id);
-			if ($result_id)
-			{
-				$row = @mssql_fetch_assoc($result_id);
-				$error['code'] = $row['code'];
-				@mssql_free_result($result_id);
-			}
-
-			// Get full error message if possible
-			$sql = 'SELECT CAST(description as varchar(255)) as message
-				FROM master.dbo.sysmessages
-				WHERE error = ' . $error['code'];
-			$result_id = @mssql_query($sql);
-
-			if ($result_id)
-			{
-				$row = @mssql_fetch_assoc($result_id);
-				if (!empty($row['message']))
-				{
-					$error['message'] .= '<br />' . $row['message'];
-				}
-				@mssql_free_result($result_id);
-			}
-		}
-		else
-		{
-			$error = array(
-				'message'	=> $this->connect_error,
-				'code'		=> '',
-			);
-		}
-
-		return $error;
-	}
-
-	/**
-	* Build db-specific query data
-	* @access private
-	*/
-	function _sql_custom_build($stage, $data)
-	{
-		return $data;
-	}
-
-	/**
-	* Close sql connection
-	* @access private
-	*/
-	function _sql_close()
-	{
-		return @mssql_close($this->db_connect_id);
-	}
-
-	/**
-	* Build db-specific report
-	* @access private
-	*/
-	function _sql_report($mode, $query = '')
-	{
-		switch ($mode)
-		{
-			case 'start':
-				$html_table = false;
-				@mssql_query('SET SHOWPLAN_TEXT ON;', $this->db_connect_id);
-				if ($result = @mssql_query($query, $this->db_connect_id))
-				{
-					@mssql_next_result($result);
-					while ($row = @mssql_fetch_row($result))
-					{
-						$html_table = $this->sql_report('add_select_row', $query, $html_table, $row);
-					}
-				}
-				@mssql_query('SET SHOWPLAN_TEXT OFF;', $this->db_connect_id);
-				@mssql_free_result($result);
-
-				if ($html_table)
-				{
-					$this->html_hold .= '</table>';
-				}
-			break;
-
-			case 'fromcache':
-				$endtime = explode(' ', microtime());
-				$endtime = $endtime[0] + $endtime[1];
-
-				$result = @mssql_query($query, $this->db_connect_id);
-				while ($void = @mssql_fetch_assoc($result))
-				{
-					// Take the time spent on parsing rows into account
-				}
-				@mssql_free_result($result);
-
-				$splittime = explode(' ', microtime());
-				$splittime = $splittime[0] + $splittime[1];
-
-				$this->sql_report('record_fromcache', $query, $endtime, $splittime);
-
-			break;
-		}
-	}
-}
diff --git a/phpBB/phpbb/db/driver/mssql_base.php b/phpBB/phpbb/db/driver/mssql_base.php
index 514df9eaca..98d16ca7fc 100644
--- a/phpBB/phpbb/db/driver/mssql_base.php
+++ b/phpBB/phpbb/db/driver/mssql_base.php
@@ -61,6 +61,14 @@ abstract class mssql_base extends \phpbb\db\driver\driver
 	}
 
 	/**
+	* {@inheritDoc}
+	*/
+	function cast_expr_to_bigint($expression)
+	{
+		return 'CONVERT(BIGINT, ' . $expression . ')';
+	}
+
+	/**
 	* Build db-specific query data
 	* @access private
 	*/
diff --git a/phpBB/phpbb/db/driver/mssql_odbc.php b/phpBB/phpbb/db/driver/mssql_odbc.php
index 8e5d4c7a4c..9d9ad603e0 100644
--- a/phpBB/phpbb/db/driver/mssql_odbc.php
+++ b/phpBB/phpbb/db/driver/mssql_odbc.php
@@ -98,8 +98,8 @@ class mssql_odbc extends \phpbb\db\driver\mssql_base
 			$row = false;
 			if ($result_id)
 			{
-				$row = @odbc_fetch_array($result_id);
-				@odbc_free_result($result_id);
+				$row = odbc_fetch_array($result_id);
+				odbc_free_result($result_id);
 			}
 
 			$this->sql_server_version = ($row) ? trim(implode(' ', $row)) : 0;
@@ -181,12 +181,17 @@ class mssql_odbc extends \phpbb\db\driver\mssql_base
 					$this->sql_time += microtime(true) - $this->curtime;
 				}
 
+				if (!$this->query_result)
+				{
+					return false;
+				}
+
 				if ($cache && $cache_ttl)
 				{
 					$this->open_queries[(int) $this->query_result] = $this->query_result;
 					$this->query_result = $cache->sql_save($this, $query, $this->query_result, $cache_ttl);
 				}
-				else if (strpos($query, 'SELECT') === 0 && $this->query_result)
+				else if (strpos($query, 'SELECT') === 0)
 				{
 					$this->open_queries[(int) $this->query_result] = $this->query_result;
 				}
@@ -261,7 +266,7 @@ class mssql_odbc extends \phpbb\db\driver\mssql_base
 			return $cache->sql_fetchrow($query_id);
 		}
 
-		return ($query_id !== false) ? @odbc_fetch_array($query_id) : false;
+		return ($query_id) ? odbc_fetch_array($query_id) : false;
 	}
 
 	/**
@@ -273,13 +278,13 @@ class mssql_odbc extends \phpbb\db\driver\mssql_base
 
 		if ($result_id)
 		{
-			if (@odbc_fetch_array($result_id))
+			if (odbc_fetch_array($result_id))
 			{
-				$id = @odbc_result($result_id, 1);
-				@odbc_free_result($result_id);
+				$id = odbc_result($result_id, 1);
+				odbc_free_result($result_id);
 				return $id;
 			}
-			@odbc_free_result($result_id);
+			odbc_free_result($result_id);
 		}
 
 		return false;
@@ -305,7 +310,7 @@ class mssql_odbc extends \phpbb\db\driver\mssql_base
 		if (isset($this->open_queries[(int) $query_id]))
 		{
 			unset($this->open_queries[(int) $query_id]);
-			return @odbc_free_result($query_id);
+			return odbc_free_result($query_id);
 		}
 
 		return false;
@@ -360,11 +365,14 @@ class mssql_odbc extends \phpbb\db\driver\mssql_base
 				$endtime = $endtime[0] + $endtime[1];
 
 				$result = @odbc_exec($this->db_connect_id, $query);
-				while ($void = @odbc_fetch_array($result))
+				if ($result)
 				{
-					// Take the time spent on parsing rows into account
+					while ($void = odbc_fetch_array($result))
+					{
+						// Take the time spent on parsing rows into account
+					}
+					odbc_free_result($result);
 				}
-				@odbc_free_result($result);
 
 				$splittime = explode(' ', microtime());
 				$splittime = $splittime[0] + $splittime[1];
diff --git a/phpBB/phpbb/db/driver/mssqlnative.php b/phpBB/phpbb/db/driver/mssqlnative.php
index 46a9b3a477..a4dcac5966 100644
--- a/phpBB/phpbb/db/driver/mssqlnative.php
+++ b/phpBB/phpbb/db/driver/mssqlnative.php
@@ -50,7 +50,8 @@ class mssqlnative extends \phpbb\db\driver\mssql_base
 		$this->db_connect_id = sqlsrv_connect($this->server, array(
 			'Database' => $this->dbname,
 			'UID' => $this->user,
-			'PWD' => $sqlpassword
+			'PWD' => $sqlpassword,
+			'CharacterSet' => 'UTF-8'
 		));
 
 		return ($this->db_connect_id) ? $this->db_connect_id : $this->sql_error('');
@@ -154,12 +155,17 @@ class mssqlnative extends \phpbb\db\driver\mssql_base
 					$this->sql_time += microtime(true) - $this->curtime;
 				}
 
+				if (!$this->query_result)
+				{
+					return false;
+				}
+
 				if ($cache && $cache_ttl)
 				{
 					$this->open_queries[(int) $this->query_result] = $this->query_result;
 					$this->query_result = $cache->sql_save($this, $query, $this->query_result, $cache_ttl);
 				}
-				else if (strpos($query, 'SELECT') === 0 && $this->query_result)
+				else if (strpos($query, 'SELECT') === 0)
 				{
 					$this->open_queries[(int) $this->query_result] = $this->query_result;
 				}
@@ -242,12 +248,12 @@ class mssqlnative extends \phpbb\db\driver\mssql_base
 			return $cache->sql_fetchrow($query_id);
 		}
 
-		if ($query_id === false)
+		if (!$query_id)
 		{
 			return false;
 		}
 
-		$row = @sqlsrv_fetch_array($query_id, SQLSRV_FETCH_ASSOC);
+		$row = sqlsrv_fetch_array($query_id, SQLSRV_FETCH_ASSOC);
 
 		if ($row)
 		{
@@ -262,7 +268,7 @@ class mssqlnative extends \phpbb\db\driver\mssql_base
 				unset($row['line2'], $row['line3']);
 			}
 		}
-		return (sizeof($row)) ? $row : false;
+		return ($row !== null) ? $row : false;
 	}
 
 	/**
@@ -272,11 +278,11 @@ class mssqlnative extends \phpbb\db\driver\mssql_base
 	{
 		$result_id = @sqlsrv_query($this->db_connect_id, 'SELECT @@IDENTITY');
 
-		if ($result_id !== false)
+		if ($result_id)
 		{
-			$row = @sqlsrv_fetch_array($result_id);
+			$row = sqlsrv_fetch_array($result_id);
 			$id = $row[0];
-			@sqlsrv_free_stmt($result_id);
+			sqlsrv_free_stmt($result_id);
 			return $id;
 		}
 		else
@@ -305,7 +311,7 @@ class mssqlnative extends \phpbb\db\driver\mssql_base
 		if (isset($this->open_queries[(int) $query_id]))
 		{
 			unset($this->open_queries[(int) $query_id]);
-			return @sqlsrv_free_stmt($query_id);
+			return sqlsrv_free_stmt($query_id);
 		}
 
 		return false;
@@ -378,14 +384,14 @@ class mssqlnative extends \phpbb\db\driver\mssql_base
 				@sqlsrv_query($this->db_connect_id, 'SET SHOWPLAN_TEXT ON;');
 				if ($result = @sqlsrv_query($this->db_connect_id, $query))
 				{
-					@sqlsrv_next_result($result);
-					while ($row = @sqlsrv_fetch_array($result))
+					sqlsrv_next_result($result);
+					while ($row = sqlsrv_fetch_array($result))
 					{
 						$html_table = $this->sql_report('add_select_row', $query, $html_table, $row);
 					}
+					sqlsrv_free_stmt($result);
 				}
 				@sqlsrv_query($this->db_connect_id, 'SET SHOWPLAN_TEXT OFF;');
-				@sqlsrv_free_stmt($result);
 
 				if ($html_table)
 				{
@@ -398,11 +404,14 @@ class mssqlnative extends \phpbb\db\driver\mssql_base
 				$endtime = $endtime[0] + $endtime[1];
 
 				$result = @sqlsrv_query($this->db_connect_id, $query);
-				while ($void = @sqlsrv_fetch_array($result))
+				if ($result)
 				{
-					// Take the time spent on parsing rows into account
+					while ($void = sqlsrv_fetch_array($result))
+					{
+						// Take the time spent on parsing rows into account
+					}
+					sqlsrv_free_stmt($result);
 				}
-				@sqlsrv_free_stmt($result);
 
 				$splittime = explode(' ', microtime());
 				$splittime = $splittime[0] + $splittime[1];
diff --git a/phpBB/phpbb/db/driver/mysql.php b/phpBB/phpbb/db/driver/mysql.php
index e93c7239e8..a94e88b331 100644
--- a/phpBB/phpbb/db/driver/mysql.php
+++ b/phpBB/phpbb/db/driver/mysql.php
@@ -70,9 +70,16 @@ class mysql extends \phpbb\db\driver\mysql_base
 					if (version_compare($this->sql_server_info(true), '5.0.2', '>='))
 					{
 						$result = @mysql_query('SELECT @@session.sql_mode AS sql_mode', $this->db_connect_id);
-						$row = @mysql_fetch_assoc($result);
-						@mysql_free_result($result);
-						$modes = array_map('trim', explode(',', $row['sql_mode']));
+						if ($result)
+						{
+							$row = mysql_fetch_assoc($result);
+							mysql_free_result($result);
+							$modes = array_map('trim', explode(',', $row['sql_mode']));
+						}
+						else
+						{
+							$modes = array();
+						}
 
 						// TRADITIONAL includes STRICT_ALL_TABLES and STRICT_TRANS_TABLES
 						if (!in_array('TRADITIONAL', $modes))
@@ -114,14 +121,17 @@ class mysql extends \phpbb\db\driver\mysql_base
 		if (!$use_cache || empty($cache) || ($this->sql_server_version = $cache->get('mysql_version')) === false)
 		{
 			$result = @mysql_query('SELECT VERSION() AS version', $this->db_connect_id);
-			$row = @mysql_fetch_assoc($result);
-			@mysql_free_result($result);
+			if ($result)
+			{
+				$row = mysql_fetch_assoc($result);
+				mysql_free_result($result);
 
-			$this->sql_server_version = $row['version'];
+				$this->sql_server_version = $row['version'];
 
-			if (!empty($cache) && $use_cache)
-			{
-				$cache->put('mysql_version', $this->sql_server_version);
+				if (!empty($cache) && $use_cache)
+				{
+					$cache->put('mysql_version', $this->sql_server_version);
+				}
 			}
 		}
 
@@ -190,12 +200,17 @@ class mysql extends \phpbb\db\driver\mysql_base
 					$this->sql_time += microtime(true) - $this->curtime;
 				}
 
+				if (!$this->query_result)
+				{
+					return false;
+				}
+
 				if ($cache && $cache_ttl)
 				{
 					$this->open_queries[(int) $this->query_result] = $this->query_result;
 					$this->query_result = $cache->sql_save($this, $query, $this->query_result, $cache_ttl);
 				}
-				else if (strpos($query, 'SELECT') === 0 && $this->query_result)
+				else if (strpos($query, 'SELECT') === 0)
 				{
 					$this->open_queries[(int) $this->query_result] = $this->query_result;
 				}
@@ -257,7 +272,7 @@ class mysql extends \phpbb\db\driver\mysql_base
 			return $cache->sql_fetchrow($query_id);
 		}
 
-		return ($query_id !== false) ? @mysql_fetch_assoc($query_id) : false;
+		return ($query_id) ? mysql_fetch_assoc($query_id) : false;
 	}
 
 	/**
@@ -308,7 +323,7 @@ class mysql extends \phpbb\db\driver\mysql_base
 		if (isset($this->open_queries[(int) $query_id]))
 		{
 			unset($this->open_queries[(int) $query_id]);
-			return @mysql_free_result($query_id);
+			return mysql_free_result($query_id);
 		}
 
 		return false;
@@ -411,12 +426,12 @@ class mysql extends \phpbb\db\driver\mysql_base
 
 					if ($result = @mysql_query("EXPLAIN $explain_query", $this->db_connect_id))
 					{
-						while ($row = @mysql_fetch_assoc($result))
+						while ($row = mysql_fetch_assoc($result))
 						{
 							$html_table = $this->sql_report('add_select_row', $query, $html_table, $row);
 						}
+						mysql_free_result($result);
 					}
-					@mysql_free_result($result);
 
 					if ($html_table)
 					{
@@ -431,7 +446,7 @@ class mysql extends \phpbb\db\driver\mysql_base
 						if ($result = @mysql_query('SHOW PROFILE ALL;', $this->db_connect_id))
 						{
 							$this->html_hold .= '<br />';
-							while ($row = @mysql_fetch_assoc($result))
+							while ($row = mysql_fetch_assoc($result))
 							{
 								// make <unknown> HTML safe
 								if (!empty($row['Source_function']))
@@ -449,8 +464,8 @@ class mysql extends \phpbb\db\driver\mysql_base
 								}
 								$html_table = $this->sql_report('add_select_row', $query, $html_table, $row);
 							}
+							mysql_free_result($result);
 						}
-						@mysql_free_result($result);
 
 						if ($html_table)
 						{
@@ -468,11 +483,14 @@ class mysql extends \phpbb\db\driver\mysql_base
 				$endtime = $endtime[0] + $endtime[1];
 
 				$result = @mysql_query($query, $this->db_connect_id);
-				while ($void = @mysql_fetch_assoc($result))
+				if ($result)
 				{
-					// Take the time spent on parsing rows into account
+					while ($void = mysql_fetch_assoc($result))
+					{
+						// Take the time spent on parsing rows into account
+					}
+					mysql_free_result($result);
 				}
-				@mysql_free_result($result);
 
 				$splittime = explode(' ', microtime());
 				$splittime = $splittime[0] + $splittime[1];
diff --git a/phpBB/phpbb/db/driver/mysqli.php b/phpBB/phpbb/db/driver/mysqli.php
index c0ddfbf76c..b429ad97aa 100644
--- a/phpBB/phpbb/db/driver/mysqli.php
+++ b/phpBB/phpbb/db/driver/mysqli.php
@@ -68,15 +68,19 @@ class mysqli extends \phpbb\db\driver\mysql_base
 
 		if ($this->db_connect_id && $this->dbname != '')
 		{
+			// Disable loading local files on client side
+			@mysqli_options($this->db_connect_id, MYSQLI_OPT_LOCAL_INFILE, false);
+
 			@mysqli_query($this->db_connect_id, "SET NAMES 'utf8'");
 
 			// enforce strict mode on databases that support it
 			if (version_compare($this->sql_server_info(true), '5.0.2', '>='))
 			{
 				$result = @mysqli_query($this->db_connect_id, 'SELECT @@session.sql_mode AS sql_mode');
-				if ($result !== null)
+				if ($result)
 				{
-					$row = @mysqli_fetch_assoc($result);
+					$row = mysqli_fetch_assoc($result);
+					mysqli_free_result($result);
 
 					$modes = array_map('trim', explode(',', $row['sql_mode']));
 				}
@@ -84,7 +88,6 @@ class mysqli extends \phpbb\db\driver\mysql_base
 				{
 					$modes = array();
 				}
-				@mysqli_free_result($result);
 
 				// TRADITIONAL includes STRICT_ALL_TABLES and STRICT_TRANS_TABLES
 				if (!in_array('TRADITIONAL', $modes))
@@ -119,9 +122,10 @@ class mysqli extends \phpbb\db\driver\mysql_base
 		if (!$use_cache || empty($cache) || ($this->sql_server_version = $cache->get('mysqli_version')) === false)
 		{
 			$result = @mysqli_query($this->db_connect_id, 'SELECT VERSION() AS version');
-			if ($result !== null)
+			if ($result)
 			{
-				$row = @mysqli_fetch_assoc($result);
+				$row = mysqli_fetch_assoc($result);
+				mysqli_free_result($result);
 
 				$this->sql_server_version = $row['version'];
 
@@ -130,7 +134,6 @@ class mysqli extends \phpbb\db\driver\mysql_base
 					$cache->put('mysqli_version', $this->sql_server_version);
 				}
 			}
-			@mysqli_free_result($result);
 		}
 
 		return ($raw) ? $this->sql_server_version : 'MySQL(i) ' . $this->sql_server_version;
@@ -202,6 +205,11 @@ class mysqli extends \phpbb\db\driver\mysql_base
 					$this->sql_time += microtime(true) - $this->curtime;
 				}
 
+				if (!$this->query_result)
+				{
+					return false;
+				}
+
 				if ($cache && $cache_ttl)
 				{
 					$this->query_result = $cache->sql_save($this, $query, $this->query_result, $cache_ttl);
@@ -245,9 +253,9 @@ class mysqli extends \phpbb\db\driver\mysql_base
 			return $cache->sql_fetchrow($query_id);
 		}
 
-		if ($query_id !== false && $query_id !== null)
+		if ($query_id)
 		{
-			$result = @mysqli_fetch_assoc($query_id);
+			$result = mysqli_fetch_assoc($query_id);
 			return $result !== null ? $result : false;
 		}
 
@@ -271,7 +279,7 @@ class mysqli extends \phpbb\db\driver\mysql_base
 			return $cache->sql_rowseek($rownum, $query_id);
 		}
 
-		return ($query_id !== false) ? @mysqli_data_seek($query_id, $rownum) : false;
+		return ($query_id) ? @mysqli_data_seek($query_id, $rownum) : false;
 	}
 
 	/**
@@ -299,7 +307,17 @@ class mysqli extends \phpbb\db\driver\mysql_base
 			return $cache->sql_freeresult($query_id);
 		}
 
-		return @mysqli_free_result($query_id);
+		if (!$query_id)
+		{
+			return false;
+		}
+
+		if ($query_id === true)
+		{
+			return true;
+		}
+
+		return mysqli_free_result($query_id);
 	}
 
 	/**
@@ -398,12 +416,12 @@ class mysqli extends \phpbb\db\driver\mysql_base
 
 					if ($result = @mysqli_query($this->db_connect_id, "EXPLAIN $explain_query"))
 					{
-						while ($row = @mysqli_fetch_assoc($result))
+						while ($row = mysqli_fetch_assoc($result))
 						{
 							$html_table = $this->sql_report('add_select_row', $query, $html_table, $row);
 						}
+						mysqli_free_result($result);
 					}
-					@mysqli_free_result($result);
 
 					if ($html_table)
 					{
@@ -418,7 +436,7 @@ class mysqli extends \phpbb\db\driver\mysql_base
 						if ($result = @mysqli_query($this->db_connect_id, 'SHOW PROFILE ALL;'))
 						{
 							$this->html_hold .= '<br />';
-							while ($row = @mysqli_fetch_assoc($result))
+							while ($row = mysqli_fetch_assoc($result))
 							{
 								// make <unknown> HTML safe
 								if (!empty($row['Source_function']))
@@ -436,8 +454,8 @@ class mysqli extends \phpbb\db\driver\mysql_base
 								}
 								$html_table = $this->sql_report('add_select_row', $query, $html_table, $row);
 							}
+							mysqli_free_result($result);
 						}
-						@mysqli_free_result($result);
 
 						if ($html_table)
 						{
@@ -455,14 +473,14 @@ class mysqli extends \phpbb\db\driver\mysql_base
 				$endtime = $endtime[0] + $endtime[1];
 
 				$result = @mysqli_query($this->db_connect_id, $query);
-				if ($result !== null)
+				if ($result)
 				{
-					while ($void = @mysqli_fetch_assoc($result))
+					while ($void = mysqli_fetch_assoc($result))
 					{
 						// Take the time spent on parsing rows into account
 					}
+					mysqli_free_result($result);
 				}
-				@mysqli_free_result($result);
 
 				$splittime = explode(' ', microtime());
 				$splittime = $splittime[0] + $splittime[1];
diff --git a/phpBB/phpbb/db/driver/oracle.php b/phpBB/phpbb/db/driver/oracle.php
index 6dcab5dd7d..5fd14709f8 100644
--- a/phpBB/phpbb/db/driver/oracle.php
+++ b/phpBB/phpbb/db/driver/oracle.php
@@ -84,8 +84,6 @@ class oracle extends \phpbb\db\driver\driver
 		* but I assume its because the Oracle extension provides a direct method to access it
 		* without a query.
 		*/
-
-		$use_cache = false;
 /*
 		global $cache;
 
@@ -138,7 +136,7 @@ class oracle extends \phpbb\db\driver\driver
 	*/
 	function _rewrite_col_compare($args)
 	{
-		if (sizeof($args) == 4)
+		if (count($args) == 4)
 		{
 			if ($args[2] == '=')
 			{
@@ -292,7 +290,7 @@ class oracle extends \phpbb\db\driver\driver
 						and/or need the db restore script, uncomment this.
 
 
-							if (sizeof($cols) !== sizeof($vals))
+							if (count($cols) !== count($vals))
 							{
 								// Try to replace some common data we know is from our restore script or from other sources
 								$regs[3] = str_replace("'||chr(47)||'", '/', $regs[3]);
@@ -334,7 +332,7 @@ class oracle extends \phpbb\db\driver\driver
 								if ($string)
 								{
 									// New value if cols != value
-									$vals[(sizeof($cols) !== sizeof($vals)) ? $i : $i - 1] .= $string;
+									$vals[(count($cols) !== count($vals)) ? $i : $i - 1] .= $string;
 								}
 
 								$vals = array(0 => $vals);
@@ -439,12 +437,17 @@ class oracle extends \phpbb\db\driver\driver
 					$this->sql_time += microtime(true) - $this->curtime;
 				}
 
+				if (!$this->query_result)
+				{
+					return false;
+				}
+
 				if ($cache && $cache_ttl)
 				{
 					$this->open_queries[(int) $this->query_result] = $this->query_result;
 					$this->query_result = $cache->sql_save($this, $query, $this->query_result, $cache_ttl);
 				}
-				else if (strpos($query, 'SELECT') === 0 && $this->query_result)
+				else if (strpos($query, 'SELECT') === 0)
 				{
 					$this->open_queries[(int) $this->query_result] = $this->query_result;
 				}
@@ -499,10 +502,10 @@ class oracle extends \phpbb\db\driver\driver
 			return $cache->sql_fetchrow($query_id);
 		}
 
-		if ($query_id !== false)
+		if ($query_id)
 		{
 			$row = array();
-			$result = @ocifetchinto($query_id, $row, OCI_ASSOC + OCI_RETURN_NULLS);
+			$result = ocifetchinto($query_id, $row, OCI_ASSOC + OCI_RETURN_NULLS);
 
 			if (!$result || !$row)
 			{
@@ -550,7 +553,7 @@ class oracle extends \phpbb\db\driver\driver
 			return $cache->sql_rowseek($rownum, $query_id);
 		}
 
-		if ($query_id === false)
+		if (!$query_id)
 		{
 			return false;
 		}
@@ -583,18 +586,24 @@ class oracle extends \phpbb\db\driver\driver
 			{
 				$query = 'SELECT ' . $tablename[1] . '_seq.currval FROM DUAL';
 				$stmt = @ociparse($this->db_connect_id, $query);
-				@ociexecute($stmt, OCI_DEFAULT);
+				if ($stmt)
+				{
+					$success = @ociexecute($stmt, OCI_DEFAULT);
 
-				$temp_result = @ocifetchinto($stmt, $temp_array, OCI_ASSOC + OCI_RETURN_NULLS);
-				@ocifreestatement($stmt);
+					if ($success)
+					{
+						$temp_result = ocifetchinto($stmt, $temp_array, OCI_ASSOC + OCI_RETURN_NULLS);
+						ocifreestatement($stmt);
 
-				if ($temp_result)
-				{
-					return $temp_array['CURRVAL'];
-				}
-				else
-				{
-					return false;
+						if ($temp_result)
+						{
+							return $temp_array['CURRVAL'];
+						}
+						else
+						{
+							return false;
+						}
+					}
 				}
 			}
 		}
@@ -622,7 +631,7 @@ class oracle extends \phpbb\db\driver\driver
 		if (isset($this->open_queries[(int) $query_id]))
 		{
 			unset($this->open_queries[(int) $query_id]);
-			return @ocifreestatement($query_id);
+			return ocifreestatement($query_id);
 		}
 
 		return false;
@@ -787,14 +796,20 @@ class oracle extends \phpbb\db\driver\driver
 				$endtime = $endtime[0] + $endtime[1];
 
 				$result = @ociparse($this->db_connect_id, $query);
-				$success = @ociexecute($result, OCI_DEFAULT);
-				$row = array();
-
-				while (@ocifetchinto($result, $row, OCI_ASSOC + OCI_RETURN_NULLS))
+				if ($result)
 				{
-					// Take the time spent on parsing rows into account
+					$success = @ociexecute($result, OCI_DEFAULT);
+					if ($success)
+					{
+						$row = array();
+
+						while (ocifetchinto($result, $row, OCI_ASSOC + OCI_RETURN_NULLS))
+						{
+							// Take the time spent on parsing rows into account
+						}
+						@ocifreestatement($result);
+					}
 				}
-				@ocifreestatement($result);
 
 				$splittime = explode(' ', microtime());
 				$splittime = $splittime[0] + $splittime[1];
diff --git a/phpBB/phpbb/db/driver/postgres.php b/phpBB/phpbb/db/driver/postgres.php
index a3b9aa4c6b..44476612c3 100644
--- a/phpBB/phpbb/db/driver/postgres.php
+++ b/phpBB/phpbb/db/driver/postgres.php
@@ -123,14 +123,17 @@ class postgres extends \phpbb\db\driver\driver
 		if (!$use_cache || empty($cache) || ($this->sql_server_version = $cache->get('pgsql_version')) === false)
 		{
 			$query_id = @pg_query($this->db_connect_id, 'SELECT VERSION() AS version');
-			$row = @pg_fetch_assoc($query_id, null);
-			@pg_free_result($query_id);
+			if ($query_id)
+			{
+				$row = pg_fetch_assoc($query_id, null);
+				pg_free_result($query_id);
 
-			$this->sql_server_version = (!empty($row['version'])) ? trim(substr($row['version'], 10)) : 0;
+				$this->sql_server_version = (!empty($row['version'])) ? trim(substr($row['version'], 10)) : 0;
 
-			if (!empty($cache) && $use_cache)
-			{
-				$cache->put('pgsql_version', $this->sql_server_version);
+				if (!empty($cache) && $use_cache)
+				{
+					$cache->put('pgsql_version', $this->sql_server_version);
+				}
 			}
 		}
 
@@ -200,12 +203,17 @@ class postgres extends \phpbb\db\driver\driver
 					$this->sql_time += microtime(true) - $this->curtime;
 				}
 
+				if (!$this->query_result)
+				{
+					return false;
+				}
+
 				if ($cache && $cache_ttl)
 				{
 					$this->open_queries[(int) $this->query_result] = $this->query_result;
 					$this->query_result = $cache->sql_save($this, $query, $this->query_result, $cache_ttl);
 				}
-				else if (strpos($query, 'SELECT') === 0 && $this->query_result)
+				else if (strpos($query, 'SELECT') === 0)
 				{
 					$this->open_queries[(int) $this->query_result] = $this->query_result;
 				}
@@ -275,7 +283,7 @@ class postgres extends \phpbb\db\driver\driver
 			return $cache->sql_fetchrow($query_id);
 		}
 
-		return ($query_id !== false) ? @pg_fetch_assoc($query_id, null) : false;
+		return ($query_id) ? pg_fetch_assoc($query_id, null) : false;
 	}
 
 	/**
@@ -295,7 +303,7 @@ class postgres extends \phpbb\db\driver\driver
 			return $cache->sql_rowseek($rownum, $query_id);
 		}
 
-		return ($query_id !== false) ? @pg_result_seek($query_id, $rownum) : false;
+		return ($query_id) ? @pg_result_seek($query_id, $rownum) : false;
 	}
 
 	/**
@@ -317,8 +325,8 @@ class postgres extends \phpbb\db\driver\driver
 					return false;
 				}
 
-				$temp_result = @pg_fetch_assoc($temp_q_id, null);
-				@pg_free_result($query_id);
+				$temp_result = pg_fetch_assoc($temp_q_id, null);
+				pg_free_result($query_id);
 
 				return ($temp_result) ? $temp_result['last_value'] : false;
 			}
@@ -347,7 +355,7 @@ class postgres extends \phpbb\db\driver\driver
 		if (isset($this->open_queries[(int) $query_id]))
 		{
 			unset($this->open_queries[(int) $query_id]);
-			return @pg_free_result($query_id);
+			return pg_free_result($query_id);
 		}
 
 		return false;
@@ -453,12 +461,12 @@ class postgres extends \phpbb\db\driver\driver
 
 					if ($result = @pg_query($this->db_connect_id, "EXPLAIN $explain_query"))
 					{
-						while ($row = @pg_fetch_assoc($result, null))
+						while ($row = pg_fetch_assoc($result, null))
 						{
 							$html_table = $this->sql_report('add_select_row', $query, $html_table, $row);
 						}
+						pg_free_result($result);
 					}
-					@pg_free_result($result);
 
 					if ($html_table)
 					{
@@ -473,11 +481,14 @@ class postgres extends \phpbb\db\driver\driver
 				$endtime = $endtime[0] + $endtime[1];
 
 				$result = @pg_query($this->db_connect_id, $query);
-				while ($void = @pg_fetch_assoc($result, null))
+				if ($result)
 				{
-					// Take the time spent on parsing rows into account
+					while ($void = pg_fetch_assoc($result, null))
+					{
+						// Take the time spent on parsing rows into account
+					}
+					pg_free_result($result);
 				}
-				@pg_free_result($result);
 
 				$splittime = explode(' ', microtime());
 				$splittime = $splittime[0] + $splittime[1];
diff --git a/phpBB/phpbb/db/driver/sqlite.php b/phpBB/phpbb/db/driver/sqlite.php
deleted file mode 100644
index d5da0e2438..0000000000
--- a/phpBB/phpbb/db/driver/sqlite.php
+++ /dev/null
@@ -1,378 +0,0 @@
-<?php
-/**
-*
-* This file is part of the phpBB Forum Software package.
-*
-* @copyright (c) phpBB Limited <https://www.phpbb.com>
-* @license GNU General Public License, version 2 (GPL-2.0)
-*
-* For full copyright and license information, please see
-* the docs/CREDITS.txt file.
-*
-*/
-
-namespace phpbb\db\driver;
-
-/**
-* Sqlite Database Abstraction Layer
-* Minimum Requirement: 2.8.2+
-*/
-class sqlite extends \phpbb\db\driver\driver
-{
-	var $connect_error = '';
-
-	/**
-	* {@inheritDoc}
-	*/
-	function sql_connect($sqlserver, $sqluser, $sqlpassword, $database, $port = false, $persistency = false, $new_link = false)
-	{
-		$this->persistency = $persistency;
-		$this->user = $sqluser;
-		$this->server = $sqlserver . (($port) ? ':' . $port : '');
-		$this->dbname = $database;
-
-		$error = '';
-		if ($this->persistency)
-		{
-			if (!function_exists('sqlite_popen'))
-			{
-				$this->connect_error = 'sqlite_popen function does not exist, is sqlite extension installed?';
-				return $this->sql_error('');
-			}
-			$this->db_connect_id = @sqlite_popen($this->server, 0666, $error);
-		}
-		else
-		{
-			if (!function_exists('sqlite_open'))
-			{
-				$this->connect_error = 'sqlite_open function does not exist, is sqlite extension installed?';
-				return $this->sql_error('');
-			}
-			$this->db_connect_id = @sqlite_open($this->server, 0666, $error);
-		}
-
-		if ($this->db_connect_id)
-		{
-			@sqlite_query('PRAGMA short_column_names = 1', $this->db_connect_id);
-//			@sqlite_query('PRAGMA encoding = "UTF-8"', $this->db_connect_id);
-		}
-
-		return ($this->db_connect_id) ? true : array('message' => $error);
-	}
-
-	/**
-	* {@inheritDoc}
-	*/
-	function sql_server_info($raw = false, $use_cache = true)
-	{
-		global $cache;
-
-		if (!$use_cache || empty($cache) || ($this->sql_server_version = $cache->get('sqlite_version')) === false)
-		{
-			$result = @sqlite_query('SELECT sqlite_version() AS version', $this->db_connect_id);
-			$row = @sqlite_fetch_array($result, SQLITE_ASSOC);
-
-			$this->sql_server_version = (!empty($row['version'])) ? $row['version'] : 0;
-
-			if (!empty($cache) && $use_cache)
-			{
-				$cache->put('sqlite_version', $this->sql_server_version);
-			}
-		}
-
-		return ($raw) ? $this->sql_server_version : 'SQLite ' . $this->sql_server_version;
-	}
-
-	/**
-	* SQL Transaction
-	* @access private
-	*/
-	function _sql_transaction($status = 'begin')
-	{
-		switch ($status)
-		{
-			case 'begin':
-				return @sqlite_query('BEGIN', $this->db_connect_id);
-			break;
-
-			case 'commit':
-				return @sqlite_query('COMMIT', $this->db_connect_id);
-			break;
-
-			case 'rollback':
-				return @sqlite_query('ROLLBACK', $this->db_connect_id);
-			break;
-		}
-
-		return true;
-	}
-
-	/**
-	* {@inheritDoc}
-	*/
-	function sql_query($query = '', $cache_ttl = 0)
-	{
-		if ($query != '')
-		{
-			global $cache;
-
-			// EXPLAIN only in extra debug mode
-			if (defined('DEBUG'))
-			{
-				$this->sql_report('start', $query);
-			}
-			else if (defined('PHPBB_DISPLAY_LOAD_TIME'))
-			{
-				$this->curtime = microtime(true);
-			}
-
-			$this->query_result = ($cache && $cache_ttl) ? $cache->sql_load($query) : false;
-			$this->sql_add_num_queries($this->query_result);
-
-			if ($this->query_result === false)
-			{
-				if (($this->query_result = @sqlite_query($query, $this->db_connect_id)) === false)
-				{
-					$this->sql_error($query);
-				}
-
-				if (defined('DEBUG'))
-				{
-					$this->sql_report('stop', $query);
-				}
-				else if (defined('PHPBB_DISPLAY_LOAD_TIME'))
-				{
-					$this->sql_time += microtime(true) - $this->curtime;
-				}
-
-				if ($cache && $cache_ttl)
-				{
-					$this->open_queries[(int) $this->query_result] = $this->query_result;
-					$this->query_result = $cache->sql_save($this, $query, $this->query_result, $cache_ttl);
-				}
-				else if (strpos($query, 'SELECT') === 0 && $this->query_result)
-				{
-					$this->open_queries[(int) $this->query_result] = $this->query_result;
-				}
-			}
-			else if (defined('DEBUG'))
-			{
-				$this->sql_report('fromcache', $query);
-			}
-		}
-		else
-		{
-			return false;
-		}
-
-		return $this->query_result;
-	}
-
-	/**
-	* Build LIMIT query
-	*/
-	function _sql_query_limit($query, $total, $offset = 0, $cache_ttl = 0)
-	{
-		$this->query_result = false;
-
-		// if $total is set to 0 we do not want to limit the number of rows
-		if ($total == 0)
-		{
-			$total = -1;
-		}
-
-		$query .= "\n LIMIT " . ((!empty($offset)) ? $offset . ', ' . $total : $total);
-
-		return $this->sql_query($query, $cache_ttl);
-	}
-
-	/**
-	* {@inheritDoc}
-	*/
-	function sql_affectedrows()
-	{
-		return ($this->db_connect_id) ? @sqlite_changes($this->db_connect_id) : false;
-	}
-
-	/**
-	* {@inheritDoc}
-	*/
-	function sql_fetchrow($query_id = false)
-	{
-		global $cache;
-
-		if ($query_id === false)
-		{
-			$query_id = $this->query_result;
-		}
-
-		if ($cache && $cache->sql_exists($query_id))
-		{
-			return $cache->sql_fetchrow($query_id);
-		}
-
-		return ($query_id !== false) ? @sqlite_fetch_array($query_id, SQLITE_ASSOC) : false;
-	}
-
-	/**
-	* {@inheritDoc}
-	*/
-	function sql_rowseek($rownum, &$query_id)
-	{
-		global $cache;
-
-		if ($query_id === false)
-		{
-			$query_id = $this->query_result;
-		}
-
-		if ($cache && $cache->sql_exists($query_id))
-		{
-			return $cache->sql_rowseek($rownum, $query_id);
-		}
-
-		return ($query_id !== false) ? @sqlite_seek($query_id, $rownum) : false;
-	}
-
-	/**
-	* {@inheritDoc}
-	*/
-	function sql_nextid()
-	{
-		return ($this->db_connect_id) ? @sqlite_last_insert_rowid($this->db_connect_id) : false;
-	}
-
-	/**
-	* {@inheritDoc}
-	*/
-	function sql_freeresult($query_id = false)
-	{
-		global $cache;
-
-		if ($query_id === false)
-		{
-			$query_id = $this->query_result;
-		}
-
-		if ($cache && !is_object($query_id) && $cache->sql_exists($query_id))
-		{
-			return $cache->sql_freeresult($query_id);
-		}
-
-		return true;
-	}
-
-	/**
-	* {@inheritDoc}
-	*/
-	function sql_escape($msg)
-	{
-		return @sqlite_escape_string($msg);
-	}
-
-	/**
-	* {@inheritDoc}
-	*
-	* For SQLite an underscore is a not-known character... this may change with SQLite3
-	*/
-	function sql_like_expression($expression)
-	{
-		// Unlike LIKE, GLOB is unfortunately case sensitive.
-		// We only catch * and ? here, not the character map possible on file globbing.
-		$expression = str_replace(array(chr(0) . '_', chr(0) . '%'), array(chr(0) . '?', chr(0) . '*'), $expression);
-
-		$expression = str_replace(array('?', '*'), array("\?", "\*"), $expression);
-		$expression = str_replace(array(chr(0) . "\?", chr(0) . "\*"), array('?', '*'), $expression);
-
-		return 'GLOB \'' . $this->sql_escape($expression) . '\'';
-	}
-
-	/**
-	* {@inheritDoc}
-	*
-	* For SQLite an underscore is a not-known character...
-	*/
-	function sql_not_like_expression($expression)
-	{
-		// Unlike NOT LIKE, NOT GLOB is unfortunately case sensitive.
-		// We only catch * and ? here, not the character map possible on file globbing.
-		$expression = str_replace(array(chr(0) . '_', chr(0) . '%'), array(chr(0) . '?', chr(0) . '*'), $expression);
-
-		$expression = str_replace(array('?', '*'), array("\?", "\*"), $expression);
-		$expression = str_replace(array(chr(0) . "\?", chr(0) . "\*"), array('?', '*'), $expression);
-
-		return 'NOT GLOB \'' . $this->sql_escape($expression) . '\'';
-	}
-
-	/**
-	* return sql error array
-	* @access private
-	*/
-	function _sql_error()
-	{
-		if (function_exists('sqlite_error_string'))
-		{
-			$error = array(
-				'message'	=> @sqlite_error_string(@sqlite_last_error($this->db_connect_id)),
-				'code'		=> @sqlite_last_error($this->db_connect_id),
-			);
-		}
-		else
-		{
-			$error = array(
-				'message'	=> $this->connect_error,
-				'code'		=> '',
-			);
-		}
-
-		return $error;
-	}
-
-	/**
-	* Build db-specific query data
-	* @access private
-	*/
-	function _sql_custom_build($stage, $data)
-	{
-		return $data;
-	}
-
-	/**
-	* Close sql connection
-	* @access private
-	*/
-	function _sql_close()
-	{
-		return @sqlite_close($this->db_connect_id);
-	}
-
-	/**
-	* Build db-specific report
-	* @access private
-	*/
-	function _sql_report($mode, $query = '')
-	{
-		switch ($mode)
-		{
-			case 'start':
-			break;
-
-			case 'fromcache':
-				$endtime = explode(' ', microtime());
-				$endtime = $endtime[0] + $endtime[1];
-
-				$result = @sqlite_query($query, $this->db_connect_id);
-				while ($void = @sqlite_fetch_array($result, SQLITE_ASSOC))
-				{
-					// Take the time spent on parsing rows into account
-				}
-
-				$splittime = explode(' ', microtime());
-				$splittime = $splittime[0] + $splittime[1];
-
-				$this->sql_report('record_fromcache', $query, $endtime, $splittime);
-
-			break;
-		}
-	}
-}
diff --git a/phpBB/phpbb/db/driver/sqlite3.php b/phpBB/phpbb/db/driver/sqlite3.php
index cc3352af34..0508500c52 100644
--- a/phpBB/phpbb/db/driver/sqlite3.php
+++ b/phpBB/phpbb/db/driver/sqlite3.php
@@ -102,7 +102,7 @@ class sqlite3 extends \phpbb\db\driver\driver
 			break;
 
 			case 'rollback':
-				return $this->dbo->exec('ROLLBACK');
+				return @$this->dbo->exec('ROLLBACK');
 			break;
 		}
 
@@ -134,9 +134,26 @@ class sqlite3 extends \phpbb\db\driver\driver
 
 			if ($this->query_result === false)
 			{
+				if ($this->transaction === true && strpos($query, 'INSERT') === 0)
+				{
+					$query = preg_replace('/^INSERT INTO/', 'INSERT OR ROLLBACK INTO', $query);
+				}
+
 				if (($this->query_result = @$this->dbo->query($query)) === false)
 				{
-					$this->sql_error($query);
+					// Try to recover a lost database connection
+					if ($this->dbo && !@$this->dbo->lastErrorMsg())
+					{
+						if ($this->sql_connect($this->server, $this->user, '', $this->dbname))
+						{
+							$this->query_result = @$this->dbo->query($query);
+						}
+					}
+
+					if ($this->query_result === false)
+					{
+						$this->sql_error($query);
+					}
 				}
 
 				if (defined('DEBUG'))
@@ -148,6 +165,11 @@ class sqlite3 extends \phpbb\db\driver\driver
 					$this->sql_time += microtime(true) - $this->curtime;
 				}
 
+				if (!$this->query_result)
+				{
+					return false;
+				}
+
 				if ($cache && $cache_ttl)
 				{
 					$this->query_result = $cache->sql_save($this, $query, $this->query_result, $cache_ttl);
@@ -208,6 +230,7 @@ class sqlite3 extends \phpbb\db\driver\driver
 
 		if ($query_id === false)
 		{
+			/** @var \SQLite3Result $query_id */
 			$query_id = $this->query_result;
 		}
 
@@ -216,7 +239,7 @@ class sqlite3 extends \phpbb\db\driver\driver
 			return $cache->sql_fetchrow($query_id);
 		}
 
-		return is_object($query_id) ? $query_id->fetchArray(SQLITE3_ASSOC) : false;
+		return is_object($query_id) ? @$query_id->fetchArray(SQLITE3_ASSOC) : false;
 	}
 
 	/**
@@ -389,9 +412,12 @@ class sqlite3 extends \phpbb\db\driver\driver
 				$endtime = $endtime[0] + $endtime[1];
 
 				$result = $this->dbo->query($query);
-				while ($void = $result->fetchArray(SQLITE3_ASSOC))
+				if ($result)
 				{
-					// Take the time spent on parsing rows into account
+						while ($void = $result->fetchArray(SQLITE3_ASSOC))
+						{
+							// Take the time spent on parsing rows into account
+						}
 				}
 
 				$splittime = explode(' ', microtime());
diff --git a/phpBB/phpbb/db/extractor/base_extractor.php b/phpBB/phpbb/db/extractor/base_extractor.php
new file mode 100644
index 0000000000..547c85f066
--- /dev/null
+++ b/phpBB/phpbb/db/extractor/base_extractor.php
@@ -0,0 +1,252 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\extractor;
+
+use phpbb\db\extractor\exception\invalid_format_exception;
+use phpbb\db\extractor\exception\extractor_not_initialized_exception;
+
+/**
+ * Abstract base class for database extraction
+ */
+abstract class base_extractor implements extractor_interface
+{
+	/**
+	 * @var    string    phpBB root path
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * @var    \phpbb\request\request_interface
+	 */
+	protected $request;
+
+	/**
+	 * @var    \phpbb\db\driver\driver_interface
+	 */
+	protected $db;
+
+	/**
+	 * @var    bool
+	 */
+	protected $download;
+
+	/**
+	 * @var    bool
+	 */
+	protected $store;
+
+	/**
+	 * @var    int
+	 */
+	protected $time;
+
+	/**
+	 * @var    string
+	 */
+	protected $format;
+
+	/**
+	 * @var    resource
+	 */
+	protected $fp;
+
+	/**
+	 * @var string
+	 */
+	protected $write;
+
+	/**
+	 * @var string
+	 */
+	protected $close;
+
+	/**
+	 * @var bool
+	 */
+	protected $run_comp;
+
+	/**
+	 * @var bool
+	 */
+	protected $is_initialized;
+
+	/**
+	 * Constructor
+	 *
+	 * @param string $phpbb_root_path
+	 * @param \phpbb\request\request_interface $request
+	 * @param \phpbb\db\driver\driver_interface $db
+	 */
+	public function __construct($phpbb_root_path, \phpbb\request\request_interface $request, \phpbb\db\driver\driver_interface $db)
+	{
+		$this->phpbb_root_path	= $phpbb_root_path;
+		$this->request			= $request;
+		$this->db				= $db;
+		$this->fp				= null;
+
+		$this->is_initialized   = false;
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function init_extractor($format, $filename, $time, $download = false, $store = false)
+	{
+		$this->download			= $download;
+		$this->store			= $store;
+		$this->time				= $time;
+		$this->format			= $format;
+
+		switch ($format)
+		{
+			case 'text':
+				$ext = '.sql';
+				$open = 'fopen';
+				$this->write = 'fwrite';
+				$this->close = 'fclose';
+				$mimetype = 'text/x-sql';
+			break;
+			case 'bzip2':
+				$ext = '.sql.bz2';
+				$open = 'bzopen';
+				$this->write = 'bzwrite';
+				$this->close = 'bzclose';
+				$mimetype = 'application/x-bzip2';
+			break;
+			case 'gzip':
+				$ext = '.sql.gz';
+				$open = 'gzopen';
+				$this->write = 'gzwrite';
+				$this->close = 'gzclose';
+				$mimetype = 'application/x-gzip';
+			break;
+			default:
+				throw new invalid_format_exception();
+			break;
+		}
+
+		if ($download === true)
+		{
+			$name = $filename . $ext;
+			header('Cache-Control: private, no-cache');
+			header("Content-Type: $mimetype; name=\"$name\"");
+			header("Content-disposition: attachment; filename=$name");
+
+			switch ($format)
+			{
+				case 'bzip2':
+					ob_start();
+				break;
+
+				case 'gzip':
+					if (strpos($this->request->header('Accept-Encoding'), 'gzip') !== false && strpos(strtolower($this->request->header('User-Agent')), 'msie') === false)
+					{
+						ob_start('ob_gzhandler');
+					}
+					else
+					{
+						$this->run_comp = true;
+					}
+				break;
+			}
+		}
+
+		if ($store === true)
+		{
+			$file = $this->phpbb_root_path . 'store/' . $filename . $ext;
+
+			$this->fp = $open($file, 'w');
+
+			if (!$this->fp)
+			{
+				trigger_error('FILE_WRITE_FAIL', E_USER_ERROR);
+			}
+		}
+
+		$this->is_initialized = true;
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function write_end()
+	{
+		static $close;
+
+		if (!$this->is_initialized)
+		{
+			throw new extractor_not_initialized_exception();
+		}
+
+		if ($this->store)
+		{
+			if ($close === null)
+			{
+				$close = $this->close;
+			}
+			$close($this->fp);
+		}
+
+		// bzip2 must be written all the way at the end
+		if ($this->download && $this->format === 'bzip2')
+		{
+			$c = ob_get_clean();
+			echo bzcompress($c);
+		}
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function flush($data)
+	{
+		static $write;
+
+		if (!$this->is_initialized)
+		{
+			throw new extractor_not_initialized_exception();
+		}
+
+		if ($this->store === true)
+		{
+			if ($write === null)
+			{
+				$write = $this->write;
+			}
+			$write($this->fp, $data);
+		}
+
+		if ($this->download === true)
+		{
+			if ($this->format === 'bzip2' || $this->format === 'text' || ($this->format === 'gzip' && !$this->run_comp))
+			{
+				echo $data;
+			}
+
+			// we can write the gzip data as soon as we get it
+			if ($this->format === 'gzip')
+			{
+				if ($this->run_comp)
+				{
+					echo gzencode($data);
+				}
+				else
+				{
+					ob_flush();
+					flush();
+				}
+			}
+		}
+	}
+}
diff --git a/phpBB/phpbb/db/extractor/exception/extractor_not_initialized_exception.php b/phpBB/phpbb/db/extractor/exception/extractor_not_initialized_exception.php
new file mode 100644
index 0000000000..62eb434be1
--- /dev/null
+++ b/phpBB/phpbb/db/extractor/exception/extractor_not_initialized_exception.php
@@ -0,0 +1,24 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\extractor\exception;
+
+use phpbb\exception\runtime_exception;
+
+/**
+* This exception is thrown when invalid format is given to the extractor
+*/
+class extractor_not_initialized_exception extends runtime_exception
+{
+
+}
diff --git a/phpBB/phpbb/db/extractor/exception/invalid_format_exception.php b/phpBB/phpbb/db/extractor/exception/invalid_format_exception.php
new file mode 100644
index 0000000000..6be24cb5dc
--- /dev/null
+++ b/phpBB/phpbb/db/extractor/exception/invalid_format_exception.php
@@ -0,0 +1,22 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\extractor\exception;
+
+/**
+* This exception is thrown when invalid format is given to the extractor
+*/
+class invalid_format_exception extends \InvalidArgumentException
+{
+
+}
diff --git a/phpBB/phpbb/db/extractor/extractor_interface.php b/phpBB/phpbb/db/extractor/extractor_interface.php
new file mode 100644
index 0000000000..ff45df9bb7
--- /dev/null
+++ b/phpBB/phpbb/db/extractor/extractor_interface.php
@@ -0,0 +1,80 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\extractor;
+
+/**
+* Database extractor interface
+*/
+interface extractor_interface
+{
+	/**
+	* Start the extraction of the database
+	*
+	* This function initialize the database extraction. It is required to call this
+	* function before calling any other extractor functions.
+	*
+	* @param string	$format
+	* @param string	$filename
+	* @param int	$time
+	* @param bool	$download
+	* @param bool	$store
+	* @return null
+	* @throws \phpbb\db\extractor\exception\invalid_format_exception when $format is invalid
+	*/
+	public function init_extractor($format, $filename, $time, $download = false, $store = false);
+
+	/**
+	* Writes header comments to the database backup
+	*
+	* @param	string	$table_prefix	prefix of phpBB database tables
+	* @return null
+	* @throws \phpbb\db\extractor\exception\extractor_not_initialized_exception when calling this function before init_extractor()
+	*/
+	public function write_start($table_prefix);
+
+	/**
+	* Closes file and/or dumps download data
+	*
+	* @return null
+	* @throws \phpbb\db\extractor\exception\extractor_not_initialized_exception when calling this function before init_extractor()
+	*/
+	public function write_end();
+
+	/**
+	* Extracts database table structure
+	*
+	* @param	string	$table_name	name of the database table
+	* @return null
+	* @throws \phpbb\db\extractor\exception\extractor_not_initialized_exception when calling this function before init_extractor()
+	*/
+	public function write_table($table_name);
+
+	/**
+	* Extracts data from database table
+	*
+	* @param	string	$table_name	name of the database table
+	* @return null
+	* @throws \phpbb\db\extractor\exception\extractor_not_initialized_exception when calling this function before init_extractor()
+	*/
+	public function write_data($table_name);
+
+	/**
+	* Writes data to file/download content
+	*
+	* @param string	$data
+	* @return null
+	* @throws \phpbb\db\extractor\exception\extractor_not_initialized_exception when calling this function before init_extractor()
+	*/
+	public function flush($data);
+}
diff --git a/phpBB/phpbb/db/extractor/factory.php b/phpBB/phpbb/db/extractor/factory.php
new file mode 100644
index 0000000000..f27aae720f
--- /dev/null
+++ b/phpBB/phpbb/db/extractor/factory.php
@@ -0,0 +1,75 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\extractor;
+
+/**
+* A factory which serves the suitable extractor instance for the given dbal
+*/
+class factory
+{
+	/**
+	 * @var \phpbb\db\driver\driver_interface
+	 */
+	protected $db;
+
+	/**
+	 * @var \Symfony\Component\DependencyInjection\ContainerInterface
+	 */
+	protected $container;
+
+	/**
+	* Extractor factory constructor
+	*
+	* @param \phpbb\db\driver\driver_interface							$db
+	* @param \Symfony\Component\DependencyInjection\ContainerInterface	$container
+	*/
+	public function __construct(\phpbb\db\driver\driver_interface $db, \Symfony\Component\DependencyInjection\ContainerInterface $container)
+	{
+		$this->db			= $db;
+		$this->container	= $container;
+	}
+
+	/**
+	* DB extractor factory getter
+	*
+	* @return \phpbb\db\extractor\extractor_interface an appropriate instance of the database extractor for the used database driver
+	* @throws \InvalidArgumentException when the database driver is unknown
+	*/
+	public function get()
+	{
+		// Return the appropriate DB extractor
+		if ($this->db instanceof \phpbb\db\driver\mssql_base)
+		{
+			return $this->container->get('dbal.extractor.extractors.mssql_extractor');
+		}
+		else if ($this->db instanceof \phpbb\db\driver\mysql_base)
+		{
+			return $this->container->get('dbal.extractor.extractors.mysql_extractor');
+		}
+		else if ($this->db instanceof \phpbb\db\driver\oracle)
+		{
+			return $this->container->get('dbal.extractor.extractors.oracle_extractor');
+		}
+		else if ($this->db instanceof \phpbb\db\driver\postgres)
+		{
+			return $this->container->get('dbal.extractor.extractors.postgres_extractor');
+		}
+		else if ($this->db instanceof \phpbb\db\driver\sqlite3)
+		{
+			return $this->container->get('dbal.extractor.extractors.sqlite3_extractor');
+		}
+
+		throw new \InvalidArgumentException('Invalid database driver given');
+	}
+}
diff --git a/phpBB/phpbb/db/extractor/mssql_extractor.php b/phpBB/phpbb/db/extractor/mssql_extractor.php
new file mode 100644
index 0000000000..4eeab4780e
--- /dev/null
+++ b/phpBB/phpbb/db/extractor/mssql_extractor.php
@@ -0,0 +1,415 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\extractor;
+
+use phpbb\db\extractor\exception\extractor_not_initialized_exception;
+
+class mssql_extractor extends base_extractor
+{
+	/**
+	* Writes closing line(s) to database backup
+	*
+	* @return null
+	* @throws \phpbb\db\extractor\exception\extractor_not_initialized_exception when calling this function before init_extractor()
+	*/
+	public function write_end()
+	{
+		if (!$this->is_initialized)
+		{
+			throw new extractor_not_initialized_exception();
+		}
+
+		$this->flush("COMMIT\nGO\n");
+		parent::write_end();
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function write_start($table_prefix)
+	{
+		if (!$this->is_initialized)
+		{
+			throw new extractor_not_initialized_exception();
+		}
+
+		$sql_data = "--\n";
+		$sql_data .= "-- phpBB Backup Script\n";
+		$sql_data .= "-- Dump of tables for $table_prefix\n";
+		$sql_data .= "-- DATE : " . gmdate("d-m-Y H:i:s", $this->time) . " GMT\n";
+		$sql_data .= "--\n";
+		$sql_data .= "BEGIN TRANSACTION\n";
+		$sql_data .= "GO\n";
+		$this->flush($sql_data);
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function write_table($table_name)
+	{
+		if (!$this->is_initialized)
+		{
+			throw new extractor_not_initialized_exception();
+		}
+
+		$sql_data = '-- Table: ' . $table_name . "\n";
+		$sql_data .= "IF OBJECT_ID(N'$table_name', N'U') IS NOT NULL\n";
+		$sql_data .= "DROP TABLE $table_name;\n";
+		$sql_data .= "GO\n";
+		$sql_data .= "\nCREATE TABLE [$table_name] (\n";
+		$rows = array();
+
+		$text_flag = false;
+
+		$sql = "SELECT COLUMN_NAME, COLUMN_DEFAULT, IS_NULLABLE, DATA_TYPE, CHARACTER_MAXIMUM_LENGTH, COLUMNPROPERTY(object_id(TABLE_NAME), COLUMN_NAME, 'IsIdentity') as IS_IDENTITY
+			FROM INFORMATION_SCHEMA.COLUMNS
+			WHERE TABLE_NAME = '$table_name'";
+		$result = $this->db->sql_query($sql);
+
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			$line = "\t[{$row['COLUMN_NAME']}] [{$row['DATA_TYPE']}]";
+
+			if ($row['DATA_TYPE'] == 'text')
+			{
+				$text_flag = true;
+			}
+
+			if ($row['IS_IDENTITY'])
+			{
+				$line .= ' IDENTITY (1 , 1)';
+			}
+
+			if ($row['CHARACTER_MAXIMUM_LENGTH'] && $row['DATA_TYPE'] !== 'text')
+			{
+				$line .= ' (' . $row['CHARACTER_MAXIMUM_LENGTH'] . ')';
+			}
+
+			if ($row['IS_NULLABLE'] == 'YES')
+			{
+				$line .= ' NULL';
+			}
+			else
+			{
+				$line .= ' NOT NULL';
+			}
+
+			if ($row['COLUMN_DEFAULT'])
+			{
+				$line .= ' DEFAULT ' . $row['COLUMN_DEFAULT'];
+			}
+
+			$rows[] = $line;
+		}
+		$this->db->sql_freeresult($result);
+
+		$sql_data .= implode(",\n", $rows);
+		$sql_data .= "\n) ON [PRIMARY]";
+
+		if ($text_flag)
+		{
+			$sql_data .= " TEXTIMAGE_ON [PRIMARY]";
+		}
+
+		$sql_data .= "\nGO\n\n";
+		$rows = array();
+
+		$sql = "SELECT CONSTRAINT_NAME, COLUMN_NAME
+			FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE
+			WHERE TABLE_NAME = '$table_name'";
+		$result = $this->db->sql_query($sql);
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			if (!count($rows))
+			{
+				$sql_data .= "ALTER TABLE [$table_name] WITH NOCHECK ADD\n";
+				$sql_data .= "\tCONSTRAINT [{$row['CONSTRAINT_NAME']}] PRIMARY KEY  CLUSTERED \n\t(\n";
+			}
+			$rows[] = "\t\t[{$row['COLUMN_NAME']}]";
+		}
+		if (count($rows))
+		{
+			$sql_data .= implode(",\n", $rows);
+			$sql_data .= "\n\t)  ON [PRIMARY] \nGO\n";
+		}
+		$this->db->sql_freeresult($result);
+
+		$index = array();
+		$sql = "EXEC sp_statistics '$table_name'";
+		$result = $this->db->sql_query($sql);
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			if ($row['TYPE'] == 3)
+			{
+				$index[$row['INDEX_NAME']][] = '[' . $row['COLUMN_NAME'] . ']';
+			}
+		}
+		$this->db->sql_freeresult($result);
+
+		foreach ($index as $index_name => $column_name)
+		{
+			$index[$index_name] = implode(', ', $column_name);
+		}
+
+		foreach ($index as $index_name => $columns)
+		{
+			$sql_data .= "\nCREATE  INDEX [$index_name] ON [$table_name]($columns) ON [PRIMARY]\nGO\n";
+		}
+		$this->flush($sql_data);
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function write_data($table_name)
+	{
+		if (!$this->is_initialized)
+		{
+			throw new extractor_not_initialized_exception();
+		}
+
+		if ($this->db->get_sql_layer() === 'mssqlnative')
+		{
+			$this->write_data_mssqlnative($table_name);
+		}
+		else
+		{
+			$this->write_data_odbc($table_name);
+		}
+	}
+
+	/**
+	* Extracts data from database table (for MSSQL Native driver)
+	*
+	* @param	string	$table_name	name of the database table
+	* @return null
+	* @throws \phpbb\db\extractor\exception\extractor_not_initialized_exception when calling this function before init_extractor()
+	*/
+	protected function write_data_mssqlnative($table_name)
+	{
+		if (!$this->is_initialized)
+		{
+			throw new extractor_not_initialized_exception();
+		}
+
+		$ary_type = $ary_name = array();
+		$ident_set = false;
+		$sql_data = '';
+
+		// Grab all of the data from current table.
+		$sql = "SELECT * FROM $table_name";
+		$this->db->mssqlnative_set_query_options(array('Scrollable' => SQLSRV_CURSOR_STATIC));
+		$result = $this->db->sql_query($sql);
+
+		$retrieved_data = $this->db->mssqlnative_num_rows($result);
+
+		if (!$retrieved_data)
+		{
+			$this->db->sql_freeresult($result);
+			return;
+		}
+
+		$sql = "SELECT COLUMN_NAME, DATA_TYPE
+			FROM INFORMATION_SCHEMA.COLUMNS
+			WHERE INFORMATION_SCHEMA.COLUMNS.TABLE_NAME = '" . $this->db->sql_escape($table_name) . "'";
+		$result_fields = $this->db->sql_query($sql);
+
+		$i_num_fields = 0;
+		while ($row = $this->db->sql_fetchrow($result_fields))
+		{
+			$ary_type[$i_num_fields] = $row['DATA_TYPE'];
+			$ary_name[$i_num_fields] = $row['COLUMN_NAME'];
+			$i_num_fields++;
+		}
+		$this->db->sql_freeresult($result_fields);
+
+		$sql = "SELECT 1 as has_identity
+			FROM INFORMATION_SCHEMA.COLUMNS
+			WHERE COLUMNPROPERTY(object_id('$table_name'), COLUMN_NAME, 'IsIdentity') = 1";
+		$result2 = $this->db->sql_query($sql);
+		$row2 = $this->db->sql_fetchrow($result2);
+
+		if (!empty($row2['has_identity']))
+		{
+			$sql_data .= "\nSET IDENTITY_INSERT $table_name ON\nGO\n";
+			$ident_set = true;
+		}
+		$this->db->sql_freeresult($result2);
+
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			$schema_vals = $schema_fields = array();
+
+			// Build the SQL statement to recreate the data.
+			for ($i = 0; $i < $i_num_fields; $i++)
+			{
+				$str_val = $row[$ary_name[$i]];
+
+				// defaults to type number - better quote just to be safe, so check for is_int too
+				if (is_int($ary_type[$i]) || preg_match('#char|text|bool|varbinary#i', $ary_type[$i]))
+				{
+					$str_quote = '';
+					$str_empty = "''";
+					$str_val = sanitize_data_mssql(str_replace("'", "''", $str_val));
+				}
+				else if (preg_match('#date|timestamp#i', $ary_type[$i]))
+				{
+					if (empty($str_val))
+					{
+						$str_quote = '';
+					}
+					else
+					{
+						$str_quote = "'";
+					}
+				}
+				else
+				{
+					$str_quote = '';
+					$str_empty = 'NULL';
+				}
+
+				if (empty($str_val) && $str_val !== '0' && !(is_int($str_val) || is_float($str_val)))
+				{
+					$str_val = $str_empty;
+				}
+
+				$schema_vals[$i] = $str_quote . $str_val . $str_quote;
+				$schema_fields[$i] = $ary_name[$i];
+			}
+
+			// Take the ordered fields and their associated data and build it
+			// into a valid sql statement to recreate that field in the data.
+			$sql_data .= "INSERT INTO $table_name (" . implode(', ', $schema_fields) . ') VALUES (' . implode(', ', $schema_vals) . ");\nGO\n";
+
+			$this->flush($sql_data);
+			$sql_data = '';
+		}
+		$this->db->sql_freeresult($result);
+
+		if ($ident_set)
+		{
+			$sql_data .= "\nSET IDENTITY_INSERT $table_name OFF\nGO\n";
+		}
+		$this->flush($sql_data);
+	}
+
+	/**
+	* Extracts data from database table (for ODBC driver)
+	*
+	* @param	string	$table_name	name of the database table
+	* @return null
+	* @throws \phpbb\db\extractor\exception\extractor_not_initialized_exception when calling this function before init_extractor()
+	*/
+	protected function write_data_odbc($table_name)
+	{
+		if (!$this->is_initialized)
+		{
+			throw new extractor_not_initialized_exception();
+		}
+
+		$ary_type = $ary_name = array();
+		$ident_set = false;
+		$sql_data = '';
+
+		// Grab all of the data from current table.
+		$sql = "SELECT *
+			FROM $table_name";
+		$result = $this->db->sql_query($sql);
+
+		$retrieved_data = odbc_num_rows($result);
+
+		if ($retrieved_data)
+		{
+			$sql = "SELECT 1 as has_identity
+				FROM INFORMATION_SCHEMA.COLUMNS
+				WHERE COLUMNPROPERTY(object_id('$table_name'), COLUMN_NAME, 'IsIdentity') = 1";
+			$result2 = $this->db->sql_query($sql);
+			$row2 = $this->db->sql_fetchrow($result2);
+			if (!empty($row2['has_identity']))
+			{
+				$sql_data .= "\nSET IDENTITY_INSERT $table_name ON\nGO\n";
+				$ident_set = true;
+			}
+			$this->db->sql_freeresult($result2);
+		}
+
+		$i_num_fields = odbc_num_fields($result);
+
+		for ($i = 0; $i < $i_num_fields; $i++)
+		{
+			$ary_type[$i] = odbc_field_type($result, $i + 1);
+			$ary_name[$i] = odbc_field_name($result, $i + 1);
+		}
+
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			$schema_vals = $schema_fields = array();
+
+			// Build the SQL statement to recreate the data.
+			for ($i = 0; $i < $i_num_fields; $i++)
+			{
+				$str_val = $row[$ary_name[$i]];
+
+				if (preg_match('#char|text|bool|varbinary#i', $ary_type[$i]))
+				{
+					$str_quote = '';
+					$str_empty = "''";
+					$str_val = sanitize_data_mssql(str_replace("'", "''", $str_val));
+				}
+				else if (preg_match('#date|timestamp#i', $ary_type[$i]))
+				{
+					if (empty($str_val))
+					{
+						$str_quote = '';
+					}
+					else
+					{
+						$str_quote = "'";
+					}
+				}
+				else
+				{
+					$str_quote = '';
+					$str_empty = 'NULL';
+				}
+
+				if (empty($str_val) && $str_val !== '0' && !(is_int($str_val) || is_float($str_val)))
+				{
+					$str_val = $str_empty;
+				}
+
+				$schema_vals[$i] = $str_quote . $str_val . $str_quote;
+				$schema_fields[$i] = $ary_name[$i];
+			}
+
+			// Take the ordered fields and their associated data and build it
+			// into a valid sql statement to recreate that field in the data.
+			$sql_data .= "INSERT INTO $table_name (" . implode(', ', $schema_fields) . ') VALUES (' . implode(', ', $schema_vals) . ");\nGO\n";
+
+			$this->flush($sql_data);
+
+			$sql_data = '';
+
+		}
+		$this->db->sql_freeresult($result);
+
+		if ($retrieved_data && $ident_set)
+		{
+			$sql_data .= "\nSET IDENTITY_INSERT $table_name OFF\nGO\n";
+		}
+		$this->flush($sql_data);
+	}
+}
diff --git a/phpBB/phpbb/db/extractor/mysql_extractor.php b/phpBB/phpbb/db/extractor/mysql_extractor.php
new file mode 100644
index 0000000000..34e309c19e
--- /dev/null
+++ b/phpBB/phpbb/db/extractor/mysql_extractor.php
@@ -0,0 +1,403 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\extractor;
+
+use phpbb\db\extractor\exception\extractor_not_initialized_exception;
+
+class mysql_extractor extends base_extractor
+{
+	/**
+	* {@inheritdoc}
+	*/
+	public function write_start($table_prefix)
+	{
+		if (!$this->is_initialized)
+		{
+			throw new extractor_not_initialized_exception();
+		}
+
+		$sql_data = "#\n";
+		$sql_data .= "# phpBB Backup Script\n";
+		$sql_data .= "# Dump of tables for $table_prefix\n";
+		$sql_data .= "# DATE : " . gmdate("d-m-Y H:i:s", $this->time) . " GMT\n";
+		$sql_data .= "#\n";
+		$this->flush($sql_data);
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function write_table($table_name)
+	{
+		static $new_extract;
+
+		if (!$this->is_initialized)
+		{
+			throw new extractor_not_initialized_exception();
+		}
+
+		if ($new_extract === null)
+		{
+			if ($this->db->get_sql_layer() === 'mysqli' || version_compare($this->db->sql_server_info(true), '3.23.20', '>='))
+			{
+				$new_extract = true;
+			}
+			else
+			{
+				$new_extract = false;
+			}
+		}
+
+		if ($new_extract)
+		{
+			$this->new_write_table($table_name);
+		}
+		else
+		{
+			$this->old_write_table($table_name);
+		}
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function write_data($table_name)
+	{
+		if (!$this->is_initialized)
+		{
+			throw new extractor_not_initialized_exception();
+		}
+
+		if ($this->db->get_sql_layer() === 'mysqli')
+		{
+			$this->write_data_mysqli($table_name);
+		}
+		else
+		{
+			$this->write_data_mysql($table_name);
+		}
+	}
+
+	/**
+	* Extracts data from database table (for MySQLi driver)
+	*
+	* @param	string	$table_name	name of the database table
+	* @return null
+	* @throws \phpbb\db\extractor\exception\extractor_not_initialized_exception when calling this function before init_extractor()
+	*/
+	protected function write_data_mysqli($table_name)
+	{
+		if (!$this->is_initialized)
+		{
+			throw new extractor_not_initialized_exception();
+		}
+
+		$sql = "SELECT *
+			FROM $table_name";
+		$result = mysqli_query($this->db->get_db_connect_id(), $sql, MYSQLI_USE_RESULT);
+		if ($result != false)
+		{
+			$fields_cnt = mysqli_num_fields($result);
+
+			// Get field information
+			$field = mysqli_fetch_fields($result);
+			$field_set = array();
+
+			for ($j = 0; $j < $fields_cnt; $j++)
+			{
+				$field_set[] = $field[$j]->name;
+			}
+
+			$search			= array("\\", "'", "\x00", "\x0a", "\x0d", "\x1a", '"');
+			$replace		= array("\\\\", "\\'", '\0', '\n', '\r', '\Z', '\\"');
+			$fields			= implode(', ', $field_set);
+			$sql_data		= 'INSERT INTO ' . $table_name . ' (' . $fields . ') VALUES ';
+			$first_set		= true;
+			$query_len		= 0;
+			$max_len		= get_usable_memory();
+
+			while ($row = mysqli_fetch_row($result))
+			{
+				$values	= array();
+				if ($first_set)
+				{
+					$query = $sql_data . '(';
+				}
+				else
+				{
+					$query  .= ',(';
+				}
+
+				for ($j = 0; $j < $fields_cnt; $j++)
+				{
+					if (!isset($row[$j]) || is_null($row[$j]))
+					{
+						$values[$j] = 'NULL';
+					}
+					else if (($field[$j]->flags & 32768) && !($field[$j]->flags & 1024))
+					{
+						$values[$j] = $row[$j];
+					}
+					else
+					{
+						$values[$j] = "'" . str_replace($search, $replace, $row[$j]) . "'";
+					}
+				}
+				$query .= implode(', ', $values) . ')';
+
+				$query_len += strlen($query);
+				if ($query_len > $max_len)
+				{
+					$this->flush($query . ";\n\n");
+					$query = '';
+					$query_len = 0;
+					$first_set = true;
+				}
+				else
+				{
+					$first_set = false;
+				}
+			}
+			mysqli_free_result($result);
+
+			// check to make sure we have nothing left to flush
+			if (!$first_set && $query)
+			{
+				$this->flush($query . ";\n\n");
+			}
+		}
+	}
+
+	/**
+	* Extracts data from database table (for MySQL driver)
+	*
+	* @param	string	$table_name	name of the database table
+	* @return null
+	* @throws \phpbb\db\extractor\exception\extractor_not_initialized_exception when calling this function before init_extractor()
+	*/
+	protected function write_data_mysql($table_name)
+	{
+		if (!$this->is_initialized)
+		{
+			throw new extractor_not_initialized_exception();
+		}
+
+		$sql = "SELECT *
+			FROM $table_name";
+		$result = mysql_unbuffered_query($sql, $this->db->get_db_connect_id());
+
+		if ($result != false)
+		{
+			$fields_cnt = mysql_num_fields($result);
+
+			// Get field information
+			$field = array();
+			for ($i = 0; $i < $fields_cnt; $i++)
+			{
+				$field[] = mysql_fetch_field($result, $i);
+			}
+			$field_set = array();
+
+			for ($j = 0; $j < $fields_cnt; $j++)
+			{
+				$field_set[] = $field[$j]->name;
+			}
+
+			$search			= array("\\", "'", "\x00", "\x0a", "\x0d", "\x1a", '"');
+			$replace		= array("\\\\", "\\'", '\0', '\n', '\r', '\Z', '\\"');
+			$fields			= implode(', ', $field_set);
+			$sql_data		= 'INSERT INTO ' . $table_name . ' (' . $fields . ') VALUES ';
+			$first_set		= true;
+			$query_len		= 0;
+			$max_len		= get_usable_memory();
+
+			while ($row = mysql_fetch_row($result))
+			{
+				$values = array();
+				if ($first_set)
+				{
+					$query = $sql_data . '(';
+				}
+				else
+				{
+					$query  .= ',(';
+				}
+
+				for ($j = 0; $j < $fields_cnt; $j++)
+				{
+					if (!isset($row[$j]) || is_null($row[$j]))
+					{
+						$values[$j] = 'NULL';
+					}
+					else if ($field[$j]->numeric && ($field[$j]->type !== 'timestamp'))
+					{
+						$values[$j] = $row[$j];
+					}
+					else
+					{
+						$values[$j] = "'" . str_replace($search, $replace, $row[$j]) . "'";
+					}
+				}
+				$query .= implode(', ', $values) . ')';
+
+				$query_len += strlen($query);
+				if ($query_len > $max_len)
+				{
+					$this->flush($query . ";\n\n");
+					$query = '';
+					$query_len = 0;
+					$first_set = true;
+				}
+				else
+				{
+					$first_set = false;
+				}
+			}
+			mysql_free_result($result);
+
+			// check to make sure we have nothing left to flush
+			if (!$first_set && $query)
+			{
+				$this->flush($query . ";\n\n");
+			}
+		}
+	}
+
+	/**
+	* Extracts database table structure (for MySQLi or MySQL 3.23.20+)
+	*
+	* @param	string	$table_name	name of the database table
+	* @return null
+	* @throws \phpbb\db\extractor\exception\extractor_not_initialized_exception when calling this function before init_extractor()
+	*/
+	protected function new_write_table($table_name)
+	{
+		if (!$this->is_initialized)
+		{
+			throw new extractor_not_initialized_exception();
+		}
+
+		$sql = 'SHOW CREATE TABLE ' . $table_name;
+		$result = $this->db->sql_query($sql);
+		$row = $this->db->sql_fetchrow($result);
+
+		$sql_data = '# Table: ' . $table_name . "\n";
+		$sql_data .= "DROP TABLE IF EXISTS $table_name;\n";
+		$this->flush($sql_data . $row['Create Table'] . ";\n\n");
+
+		$this->db->sql_freeresult($result);
+	}
+
+	/**
+	* Extracts database table structure (for MySQL verisons older than 3.23.20)
+	*
+	* @param	string	$table_name	name of the database table
+	* @return null
+	* @throws \phpbb\db\extractor\exception\extractor_not_initialized_exception when calling this function before init_extractor()
+	*/
+	protected function old_write_table($table_name)
+	{
+		if (!$this->is_initialized)
+		{
+			throw new extractor_not_initialized_exception();
+		}
+
+		$sql_data = '# Table: ' . $table_name . "\n";
+		$sql_data .= "DROP TABLE IF EXISTS $table_name;\n";
+		$sql_data .= "CREATE TABLE $table_name(\n";
+		$rows = array();
+
+		$sql = "SHOW FIELDS
+			FROM $table_name";
+		$result = $this->db->sql_query($sql);
+
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			$line = '   ' . $row['Field'] . ' ' . $row['Type'];
+
+			if (!is_null($row['Default']))
+			{
+				$line .= " DEFAULT '{$row['Default']}'";
+			}
+
+			if ($row['Null'] != 'YES')
+			{
+				$line .= ' NOT NULL';
+			}
+
+			if ($row['Extra'] != '')
+			{
+				$line .= ' ' . $row['Extra'];
+			}
+
+			$rows[] = $line;
+		}
+		$this->db->sql_freeresult($result);
+
+		$sql = "SHOW KEYS
+			FROM $table_name";
+
+		$result = $this->db->sql_query($sql);
+
+		$index = array();
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			$kname = $row['Key_name'];
+
+			if ($kname != 'PRIMARY')
+			{
+				if ($row['Non_unique'] == 0)
+				{
+					$kname = "UNIQUE|$kname";
+				}
+			}
+
+			if ($row['Sub_part'])
+			{
+				$row['Column_name'] .= '(' . $row['Sub_part'] . ')';
+			}
+			$index[$kname][] = $row['Column_name'];
+		}
+		$this->db->sql_freeresult($result);
+
+		foreach ($index as $key => $columns)
+		{
+			$line = '   ';
+
+			if ($key == 'PRIMARY')
+			{
+				$line .= 'PRIMARY KEY (' . implode(', ', $columns) . ')';
+			}
+			else if (strpos($key, 'UNIQUE') === 0)
+			{
+				$line .= 'UNIQUE ' . substr($key, 7) . ' (' . implode(', ', $columns) . ')';
+			}
+			else if (strpos($key, 'FULLTEXT') === 0)
+			{
+				$line .= 'FULLTEXT ' . substr($key, 9) . ' (' . implode(', ', $columns) . ')';
+			}
+			else
+			{
+				$line .= "KEY $key (" . implode(', ', $columns) . ')';
+			}
+
+			$rows[] = $line;
+		}
+
+		$sql_data .= implode(",\n", $rows);
+		$sql_data .= "\n);\n\n";
+
+		$this->flush($sql_data);
+	}
+}
diff --git a/phpBB/phpbb/db/extractor/oracle_extractor.php b/phpBB/phpbb/db/extractor/oracle_extractor.php
new file mode 100644
index 0000000000..bc43a37b10
--- /dev/null
+++ b/phpBB/phpbb/db/extractor/oracle_extractor.php
@@ -0,0 +1,263 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\extractor;
+
+use phpbb\db\extractor\exception\extractor_not_initialized_exception;
+
+class oracle_extractor extends base_extractor
+{
+	/**
+	* {@inheritdoc}
+	*/
+	public function write_table($table_name)
+	{
+		if (!$this->is_initialized)
+		{
+			throw new extractor_not_initialized_exception();
+		}
+
+		$sql_data = '-- Table: ' . $table_name . "\n";
+		$sql_data .= "DROP TABLE $table_name\n/\n";
+		$sql_data .= "\nCREATE TABLE $table_name (\n";
+
+		$sql = "SELECT COLUMN_NAME, DATA_TYPE, DATA_PRECISION, DATA_LENGTH, NULLABLE, DATA_DEFAULT
+			FROM ALL_TAB_COLS
+			WHERE table_name = '{$table_name}'";
+		$result = $this->db->sql_query($sql);
+
+		$rows = array();
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			$line = '  "' . $row['column_name'] . '" ' . $row['data_type'];
+
+			if ($row['data_type'] !== 'CLOB')
+			{
+				if ($row['data_type'] !== 'VARCHAR2' && $row['data_type'] !== 'CHAR')
+				{
+					$line .= '(' . $row['data_precision'] . ')';
+				}
+				else
+				{
+					$line .= '(' . $row['data_length'] . ')';
+				}
+			}
+
+			if (!empty($row['data_default']))
+			{
+				$line .= ' DEFAULT ' . $row['data_default'];
+			}
+
+			if ($row['nullable'] == 'N')
+			{
+				$line .= ' NOT NULL';
+			}
+			$rows[] = $line;
+		}
+		$this->db->sql_freeresult($result);
+
+		$sql = "SELECT A.CONSTRAINT_NAME, A.COLUMN_NAME
+			FROM USER_CONS_COLUMNS A, USER_CONSTRAINTS B
+			WHERE A.CONSTRAINT_NAME = B.CONSTRAINT_NAME
+				AND B.CONSTRAINT_TYPE = 'P'
+				AND A.TABLE_NAME = '{$table_name}'";
+		$result = $this->db->sql_query($sql);
+
+		$primary_key = array();
+		$constraint_name = '';
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			$constraint_name = '"' . $row['constraint_name'] . '"';
+			$primary_key[] = '"' . $row['column_name'] . '"';
+		}
+		$this->db->sql_freeresult($result);
+
+		if (count($primary_key))
+		{
+			$rows[] = "  CONSTRAINT {$constraint_name} PRIMARY KEY (" . implode(', ', $primary_key) . ')';
+		}
+
+		$sql = "SELECT A.CONSTRAINT_NAME, A.COLUMN_NAME
+			FROM USER_CONS_COLUMNS A, USER_CONSTRAINTS B
+			WHERE A.CONSTRAINT_NAME = B.CONSTRAINT_NAME
+				AND B.CONSTRAINT_TYPE = 'U'
+				AND A.TABLE_NAME = '{$table_name}'";
+		$result = $this->db->sql_query($sql);
+
+		$unique = array();
+		$constraint_name = '';
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			$constraint_name = '"' . $row['constraint_name'] . '"';
+			$unique[] = '"' . $row['column_name'] . '"';
+		}
+		$this->db->sql_freeresult($result);
+
+		if (count($unique))
+		{
+			$rows[] = "  CONSTRAINT {$constraint_name} UNIQUE (" . implode(', ', $unique) . ')';
+		}
+
+		$sql_data .= implode(",\n", $rows);
+		$sql_data .= "\n)\n/\n";
+
+		$sql = "SELECT A.REFERENCED_NAME, C.*
+			FROM USER_DEPENDENCIES A, USER_TRIGGERS B, USER_SEQUENCES C
+			WHERE A.REFERENCED_TYPE = 'SEQUENCE'
+				AND A.NAME = B.TRIGGER_NAME
+				AND B.TABLE_NAME = '{$table_name}'
+				AND C.SEQUENCE_NAME = A.REFERENCED_NAME";
+		$result = $this->db->sql_query($sql);
+
+		$type = $this->request->variable('type', '');
+
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			$sql_data .= "\nDROP SEQUENCE \"{$row['referenced_name']}\"\n/\n";
+			$sql_data .= "\nCREATE SEQUENCE \"{$row['referenced_name']}\"";
+
+			if ($type == 'full')
+			{
+				$sql_data .= ' START WITH ' . $row['last_number'];
+			}
+
+			$sql_data .= "\n/\n";
+		}
+		$this->db->sql_freeresult($result);
+
+		$sql = "SELECT DESCRIPTION, WHEN_CLAUSE, TRIGGER_BODY
+			FROM USER_TRIGGERS
+			WHERE TABLE_NAME = '{$table_name}'";
+		$result = $this->db->sql_query($sql);
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			$sql_data .= "\nCREATE OR REPLACE TRIGGER {$row['description']}WHEN ({$row['when_clause']})\n{$row['trigger_body']}\n/\n";
+		}
+		$this->db->sql_freeresult($result);
+
+		$sql = "SELECT A.INDEX_NAME, B.COLUMN_NAME
+			FROM USER_INDEXES A, USER_IND_COLUMNS B
+			WHERE A.UNIQUENESS = 'NONUNIQUE'
+				AND A.INDEX_NAME = B.INDEX_NAME
+				AND B.TABLE_NAME = '{$table_name}'";
+		$result = $this->db->sql_query($sql);
+
+		$index = array();
+
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			$index[$row['index_name']][] = $row['column_name'];
+		}
+
+		foreach ($index as $index_name => $column_names)
+		{
+			$sql_data .= "\nCREATE INDEX $index_name ON $table_name(" . implode(', ', $column_names) . ")\n/\n";
+		}
+		$this->db->sql_freeresult($result);
+		$this->flush($sql_data);
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function write_data($table_name)
+	{
+		if (!$this->is_initialized)
+		{
+			throw new extractor_not_initialized_exception();
+		}
+
+		$ary_type = $ary_name = array();
+
+		// Grab all of the data from current table.
+		$sql = "SELECT *
+			FROM $table_name";
+		$result = $this->db->sql_query($sql);
+
+		$i_num_fields = ocinumcols($result);
+
+		for ($i = 0; $i < $i_num_fields; $i++)
+		{
+			$ary_type[$i] = ocicolumntype($result, $i + 1);
+			$ary_name[$i] = ocicolumnname($result, $i + 1);
+		}
+
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			$schema_vals = $schema_fields = array();
+
+			// Build the SQL statement to recreate the data.
+			for ($i = 0; $i < $i_num_fields; $i++)
+			{
+				// Oracle uses uppercase - we use lowercase
+				$str_val = $row[strtolower($ary_name[$i])];
+
+				if (preg_match('#char|text|bool|raw|clob#i', $ary_type[$i]))
+				{
+					$str_quote = '';
+					$str_empty = "''";
+					$str_val = sanitize_data_oracle($str_val);
+				}
+				else if (preg_match('#date|timestamp#i', $ary_type[$i]))
+				{
+					if (empty($str_val))
+					{
+						$str_quote = '';
+					}
+					else
+					{
+						$str_quote = "'";
+					}
+				}
+				else
+				{
+					$str_quote = '';
+					$str_empty = 'NULL';
+				}
+
+				if (empty($str_val) && $str_val !== '0')
+				{
+					$str_val = $str_empty;
+				}
+
+				$schema_vals[$i] = $str_quote . $str_val . $str_quote;
+				$schema_fields[$i] = '"' . $ary_name[$i] . '"';
+			}
+
+			// Take the ordered fields and their associated data and build it
+			// into a valid sql statement to recreate that field in the data.
+			$sql_data = "INSERT INTO $table_name (" . implode(', ', $schema_fields) . ') VALUES (' . implode(', ', $schema_vals) . ")\n/\n";
+
+			$this->flush($sql_data);
+		}
+		$this->db->sql_freeresult($result);
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function write_start($table_prefix)
+	{
+		if (!$this->is_initialized)
+		{
+			throw new extractor_not_initialized_exception();
+		}
+
+		$sql_data = "--\n";
+		$sql_data .= "-- phpBB Backup Script\n";
+		$sql_data .= "-- Dump of tables for $table_prefix\n";
+		$sql_data .= "-- DATE : " . gmdate("d-m-Y H:i:s", $this->time) . " GMT\n";
+		$sql_data .= "--\n";
+		$this->flush($sql_data);
+	}
+}
diff --git a/phpBB/phpbb/db/extractor/postgres_extractor.php b/phpBB/phpbb/db/extractor/postgres_extractor.php
new file mode 100644
index 0000000000..0219d2ac8d
--- /dev/null
+++ b/phpBB/phpbb/db/extractor/postgres_extractor.php
@@ -0,0 +1,339 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\extractor;
+
+use phpbb\db\extractor\exception\extractor_not_initialized_exception;
+
+class postgres_extractor extends base_extractor
+{
+	/**
+	* {@inheritdoc}
+	*/
+	public function write_start($table_prefix)
+	{
+		if (!$this->is_initialized)
+		{
+			throw new extractor_not_initialized_exception();
+		}
+
+		$sql_data = "--\n";
+		$sql_data .= "-- phpBB Backup Script\n";
+		$sql_data .= "-- Dump of tables for $table_prefix\n";
+		$sql_data .= "-- DATE : " . gmdate("d-m-Y H:i:s", $this->time) . " GMT\n";
+		$sql_data .= "--\n";
+		$sql_data .= "BEGIN TRANSACTION;\n";
+		$this->flush($sql_data);
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function write_table($table_name)
+	{
+		static $domains_created = array();
+
+		if (!$this->is_initialized)
+		{
+			throw new extractor_not_initialized_exception();
+		}
+
+		$sql = "SELECT a.domain_name, a.data_type, a.character_maximum_length, a.domain_default
+			FROM INFORMATION_SCHEMA.domains a, INFORMATION_SCHEMA.column_domain_usage b
+			WHERE a.domain_name = b.domain_name
+				AND b.table_name = '{$table_name}'";
+		$result = $this->db->sql_query($sql);
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			if (empty($domains_created[$row['domain_name']]))
+			{
+				$domains_created[$row['domain_name']] = true;
+				//$sql_data = "DROP DOMAIN {$row['domain_name']};\n";
+				$sql_data = "CREATE DOMAIN {$row['domain_name']} as {$row['data_type']}";
+				if (!empty($row['character_maximum_length']))
+				{
+					$sql_data .= '(' . $row['character_maximum_length'] . ')';
+				}
+				$sql_data .= ' NOT NULL';
+				if (!empty($row['domain_default']))
+				{
+					$sql_data .= ' DEFAULT ' . $row['domain_default'];
+				}
+				$this->flush($sql_data . ";\n");
+			}
+		}
+		$this->db->sql_freeresult($result);
+
+		$sql_data = '-- Table: ' . $table_name . "\n";
+		$sql_data .= "DROP TABLE $table_name;\n";
+		// PGSQL does not "tightly" bind sequences and tables, we must guess...
+		$sql = "SELECT relname
+			FROM pg_class
+			WHERE relkind = 'S'
+				AND relname = '{$table_name}_seq'";
+		$result = $this->db->sql_query($sql);
+		// We don't even care about storing the results. We already know the answer if we get rows back.
+		if ($this->db->sql_fetchrow($result))
+		{
+			$sql_data .= "DROP SEQUENCE IF EXISTS {$table_name}_seq;\n";
+			$sql_data .= "CREATE SEQUENCE {$table_name}_seq;\n";
+		}
+		$this->db->sql_freeresult($result);
+
+		$field_query = "SELECT a.attnum, a.attname as field, t.typname as type, a.attlen as length, a.atttypmod as lengthvar, a.attnotnull as notnull
+			FROM pg_class c, pg_attribute a, pg_type t
+			WHERE c.relname = '" . $this->db->sql_escape($table_name) . "'
+				AND a.attnum > 0
+				AND a.attrelid = c.oid
+				AND a.atttypid = t.oid
+			ORDER BY a.attnum";
+		$result = $this->db->sql_query($field_query);
+
+		$sql_data .= "CREATE TABLE $table_name(\n";
+		$lines = array();
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			// Get the data from the table
+			$sql_get_default = "SELECT pg_get_expr(d.adbin, d.adrelid) as rowdefault
+				FROM pg_attrdef d, pg_class c
+				WHERE (c.relname = '" . $this->db->sql_escape($table_name) . "')
+					AND (c.oid = d.adrelid)
+					AND d.adnum = " . $row['attnum'];
+			$def_res = $this->db->sql_query($sql_get_default);
+			$def_row = $this->db->sql_fetchrow($def_res);
+			$this->db->sql_freeresult($def_res);
+
+			if (empty($def_row))
+			{
+				unset($row['rowdefault']);
+			}
+			else
+			{
+				$row['rowdefault'] = $def_row['rowdefault'];
+			}
+
+			if ($row['type'] == 'bpchar')
+			{
+				// Internally stored as bpchar, but isn't accepted in a CREATE TABLE statement.
+				$row['type'] = 'char';
+			}
+
+			$line = '  ' . $row['field'] . ' ' . $row['type'];
+
+			if (strpos($row['type'], 'char') !== false)
+			{
+				if ($row['lengthvar'] > 0)
+				{
+					$line .= '(' . ($row['lengthvar'] - 4) . ')';
+				}
+			}
+
+			if (strpos($row['type'], 'numeric') !== false)
+			{
+				$line .= '(';
+				$line .= sprintf("%s,%s", (($row['lengthvar'] >> 16) & 0xffff), (($row['lengthvar'] - 4) & 0xffff));
+				$line .= ')';
+			}
+
+			if (isset($row['rowdefault']))
+			{
+				$line .= ' DEFAULT ' . $row['rowdefault'];
+			}
+
+			if ($row['notnull'] == 't')
+			{
+				$line .= ' NOT NULL';
+			}
+
+			$lines[] = $line;
+		}
+		$this->db->sql_freeresult($result);
+
+		// Get the listing of primary keys.
+		$sql_pri_keys = "SELECT ic.relname as index_name, bc.relname as tab_name, ta.attname as column_name, i.indisunique as unique_key, i.indisprimary as primary_key
+			FROM pg_class bc, pg_class ic, pg_index i, pg_attribute ta, pg_attribute ia
+			WHERE (bc.oid = i.indrelid)
+				AND (ic.oid = i.indexrelid)
+				AND (ia.attrelid = i.indexrelid)
+				AND	(ta.attrelid = bc.oid)
+				AND (bc.relname = '" . $this->db->sql_escape($table_name) . "')
+				AND (ta.attrelid = i.indrelid)
+				AND (ta.attnum = i.indkey[ia.attnum-1])
+			ORDER BY index_name, tab_name, column_name";
+
+		$result = $this->db->sql_query($sql_pri_keys);
+
+		$index_create = $index_rows = $primary_key = array();
+
+		// We do this in two steps. It makes placing the comma easier
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			if ($row['primary_key'] == 't')
+			{
+				$primary_key[] = $row['column_name'];
+				$primary_key_name = $row['index_name'];
+			}
+			else
+			{
+				// We have to store this all this info because it is possible to have a multi-column key...
+				// we can loop through it again and build the statement
+				$index_rows[$row['index_name']]['table'] = $table_name;
+				$index_rows[$row['index_name']]['unique'] = ($row['unique_key'] == 't') ? true : false;
+				$index_rows[$row['index_name']]['column_names'][] = $row['column_name'];
+			}
+		}
+		$this->db->sql_freeresult($result);
+
+		if (!empty($index_rows))
+		{
+			foreach ($index_rows as $idx_name => $props)
+			{
+				$index_create[] = 'CREATE ' . ($props['unique'] ? 'UNIQUE ' : '') . "INDEX $idx_name ON $table_name (" . implode(', ', $props['column_names']) . ");";
+			}
+		}
+
+		if (!empty($primary_key))
+		{
+			$lines[] = "  CONSTRAINT $primary_key_name PRIMARY KEY (" . implode(', ', $primary_key) . ")";
+		}
+
+		// Generate constraint clauses for CHECK constraints
+		$sql_checks = "SELECT conname as index_name, consrc
+			FROM pg_constraint, pg_class bc
+			WHERE conrelid = bc.oid
+				AND bc.relname = '" . $this->db->sql_escape($table_name) . "'
+				AND NOT EXISTS (
+					SELECT *
+						FROM pg_constraint as c, pg_inherits as i
+						WHERE i.inhrelid = pg_constraint.conrelid
+							AND c.conname = pg_constraint.conname
+							AND c.consrc = pg_constraint.consrc
+							AND c.conrelid = i.inhparent
+				)";
+		$result = $this->db->sql_query($sql_checks);
+
+		// Add the constraints to the sql file.
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			if (!is_null($row['consrc']))
+			{
+				$lines[] = '  CONSTRAINT ' . $row['index_name'] . ' CHECK ' . $row['consrc'];
+			}
+		}
+		$this->db->sql_freeresult($result);
+
+		$sql_data .= implode(", \n", $lines);
+		$sql_data .= "\n);\n";
+
+		if (!empty($index_create))
+		{
+			$sql_data .= implode("\n", $index_create) . "\n\n";
+		}
+		$this->flush($sql_data);
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function write_data($table_name)
+	{
+		if (!$this->is_initialized)
+		{
+			throw new extractor_not_initialized_exception();
+		}
+
+		// Grab all of the data from current table.
+		$sql = "SELECT *
+			FROM $table_name";
+		$result = $this->db->sql_query($sql);
+
+		$i_num_fields = pg_num_fields($result);
+		$seq = '';
+
+		for ($i = 0; $i < $i_num_fields; $i++)
+		{
+			$ary_type[] = pg_field_type($result, $i);
+			$ary_name[] = pg_field_name($result, $i);
+
+			$sql = "SELECT pg_get_expr(d.adbin, d.adrelid) as rowdefault
+				FROM pg_attrdef d, pg_class c
+				WHERE (c.relname = '{$table_name}')
+					AND (c.oid = d.adrelid)
+					AND d.adnum = " . strval($i + 1);
+			$result2 = $this->db->sql_query($sql);
+			if ($row = $this->db->sql_fetchrow($result2))
+			{
+				// Determine if we must reset the sequences
+				if (strpos($row['rowdefault'], "nextval('") === 0)
+				{
+					$seq .= "SELECT SETVAL('{$table_name}_seq',(select case when max({$ary_name[$i]})>0 then max({$ary_name[$i]})+1 else 1 end FROM {$table_name}));\n";
+				}
+			}
+		}
+
+		$this->flush("COPY $table_name (" . implode(', ', $ary_name) . ') FROM stdin;' . "\n");
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			$schema_vals = array();
+
+			// Build the SQL statement to recreate the data.
+			for ($i = 0; $i < $i_num_fields; $i++)
+			{
+				$str_val = $row[$ary_name[$i]];
+
+				if (preg_match('#char|text|bool|bytea#i', $ary_type[$i]))
+				{
+					$str_val = str_replace(array("\n", "\t", "\r", "\b", "\f", "\v"), array('\n', '\t', '\r', '\b', '\f', '\v'), addslashes($str_val));
+					$str_empty = '';
+				}
+				else
+				{
+					$str_empty = '\N';
+				}
+
+				if (empty($str_val) && $str_val !== '0')
+				{
+					$str_val = $str_empty;
+				}
+
+				$schema_vals[] = $str_val;
+			}
+
+			// Take the ordered fields and their associated data and build it
+			// into a valid sql statement to recreate that field in the data.
+			$this->flush(implode("\t", $schema_vals) . "\n");
+		}
+		$this->db->sql_freeresult($result);
+		$this->flush("\\.\n");
+
+		// Write out the sequence statements
+		$this->flush($seq);
+	}
+
+	/**
+	* Writes closing line(s) to database backup
+	*
+	* @return null
+	* @throws \phpbb\db\extractor\exception\extractor_not_initialized_exception when calling this function before init_extractor()
+	*/
+	public function write_end()
+	{
+		if (!$this->is_initialized)
+		{
+			throw new extractor_not_initialized_exception();
+		}
+
+		$this->flush("COMMIT;\n");
+		parent::write_end();
+	}
+}
diff --git a/phpBB/phpbb/db/extractor/sqlite3_extractor.php b/phpBB/phpbb/db/extractor/sqlite3_extractor.php
new file mode 100644
index 0000000000..ce8da6a652
--- /dev/null
+++ b/phpBB/phpbb/db/extractor/sqlite3_extractor.php
@@ -0,0 +1,151 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\extractor;
+
+use phpbb\db\extractor\exception\extractor_not_initialized_exception;
+
+class sqlite3_extractor extends base_extractor
+{
+	/**
+	* {@inheritdoc}
+	*/
+	public function write_start($table_prefix)
+	{
+		if (!$this->is_initialized)
+		{
+			throw new extractor_not_initialized_exception();
+		}
+
+		$sql_data = "--\n";
+		$sql_data .= "-- phpBB Backup Script\n";
+		$sql_data .= "-- Dump of tables for $table_prefix\n";
+		$sql_data .= "-- DATE : " . gmdate("d-m-Y H:i:s", $this->time) . " GMT\n";
+		$sql_data .= "--\n";
+		$sql_data .= "BEGIN TRANSACTION;\n";
+		$this->flush($sql_data);
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function write_table($table_name)
+	{
+		if (!$this->is_initialized)
+		{
+			throw new extractor_not_initialized_exception();
+		}
+
+		$sql_data = '-- Table: ' . $table_name . "\n";
+		$sql_data .= "DROP TABLE $table_name;\n";
+
+		$sql = "SELECT sql
+			FROM sqlite_master
+			WHERE type = 'table'
+				AND name = '" . $this->db->sql_escape($table_name) . "'
+			ORDER BY name ASC;";
+		$result = $this->db->sql_query($sql);
+		$row = $this->db->sql_fetchrow($result);
+		$this->db->sql_freeresult($result);
+
+		// Create Table
+		$sql_data .= $row['sql'] . ";\n";
+
+		$result = $this->db->sql_query("PRAGMA index_list('" . $this->db->sql_escape($table_name) . "');");
+
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			if (strpos($row['name'], 'autoindex') !== false)
+			{
+				continue;
+			}
+
+			$result2 = $this->db->sql_query("PRAGMA index_info('" . $this->db->sql_escape($row['name']) . "');");
+
+			$fields = array();
+			while ($row2 = $this->db->sql_fetchrow($result2))
+			{
+				$fields[] = $row2['name'];
+			}
+			$this->db->sql_freeresult($result2);
+
+			$sql_data .= 'CREATE ' . ($row['unique'] ? 'UNIQUE ' : '') . 'INDEX ' . $row['name'] . ' ON ' . $table_name . ' (' . implode(', ', $fields) . ");\n";
+		}
+		$this->db->sql_freeresult($result);
+
+		$this->flush($sql_data . "\n");
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function write_data($table_name)
+	{
+		if (!$this->is_initialized)
+		{
+			throw new extractor_not_initialized_exception();
+		}
+
+		$result = $this->db->sql_query("PRAGMA table_info('" . $this->db->sql_escape($table_name) . "');");
+
+		$col_types = array();
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			$col_types[$row['name']] = $row['type'];
+		}
+		$this->db->sql_freeresult($result);
+
+		$sql_insert = 'INSERT INTO ' . $table_name . ' (' . implode(', ', array_keys($col_types)) . ') VALUES (';
+
+		$sql = "SELECT *
+			FROM $table_name";
+		$result = $this->db->sql_query($sql);
+
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			foreach ($row as $column_name => $column_data)
+			{
+				if (is_null($column_data))
+				{
+					$row[$column_name] = 'NULL';
+				}
+				else if ($column_data === '')
+				{
+					$row[$column_name] = "''";
+				}
+				else if (stripos($col_types[$column_name], 'text') !== false || stripos($col_types[$column_name], 'char') !== false || stripos($col_types[$column_name], 'blob') !== false)
+				{
+					$row[$column_name] = sanitize_data_generic(str_replace("'", "''", $column_data));
+				}
+			}
+			$this->flush($sql_insert . implode(', ', $row) . ");\n");
+		}
+	}
+
+	/**
+	* Writes closing line(s) to database backup
+	*
+	* @return null
+	* @throws \phpbb\db\extractor\exception\extractor_not_initialized_exception when calling this function before init_extractor()
+	*/
+	public function write_end()
+	{
+		if (!$this->is_initialized)
+		{
+			throw new extractor_not_initialized_exception();
+		}
+
+		$this->flush("COMMIT;\n");
+		parent::write_end();
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v30x/release_3_0_5_rc1.php b/phpBB/phpbb/db/migration/data/v30x/release_3_0_5_rc1.php
index 003ccf8f18..084d00a13a 100644
--- a/phpBB/phpbb/db/migration/data/v30x/release_3_0_5_rc1.php
+++ b/phpBB/phpbb/db/migration/data/v30x/release_3_0_5_rc1.php
@@ -57,7 +57,9 @@ class release_3_0_5_rc1 extends container_aware_migration
 
 	public function hash_old_passwords()
 	{
+		/* @var $passwords_manager \phpbb\passwords\manager */
 		$passwords_manager = $this->container->get('passwords.manager');
+
 		$sql = 'SELECT user_id, user_password
 				FROM ' . $this->table_prefix . 'users
 				WHERE user_pass_convert = 1';
@@ -116,7 +118,7 @@ class release_3_0_5_rc1 extends container_aware_migration
 				$result = $this->db->sql_query($sql);
 
 				// Skip first row, this is our original auth option we want to preserve
-				$row = $this->db->sql_fetchrow($result);
+				$this->db->sql_fetchrow($result);
 
 				while ($row = $this->db->sql_fetchrow($result))
 				{
diff --git a/phpBB/phpbb/db/migration/data/v30x/release_3_0_6_rc1.php b/phpBB/phpbb/db/migration/data/v30x/release_3_0_6_rc1.php
index faef68121d..40bb58c10d 100644
--- a/phpBB/phpbb/db/migration/data/v30x/release_3_0_6_rc1.php
+++ b/phpBB/phpbb/db/migration/data/v30x/release_3_0_6_rc1.php
@@ -153,7 +153,10 @@ class release_3_0_6_rc1 extends \phpbb\db\migration\migration
 				'ACP_BOARD_CONFIGURATION',
 				array(
 					'module_basename'	=> 'acp_board',
-					'modes'				=> array('feed'),
+					'module_langname'	=> 'ACP_FEED_SETTINGS',
+					'module_mode'		=> 'feed',
+					'module_auth'		=> 'acl_a_board',
+					'after'				=> array('signature', 'ACP_SIGNATURE_SETTINGS'),
 				),
 			)),
 			array('module.add', array(
@@ -161,7 +164,11 @@ class release_3_0_6_rc1 extends \phpbb\db\migration\migration
 				'ACP_CAT_USERS',
 				array(
 					'module_basename'	=> 'acp_users',
-					'modes'				=> array('warnings'),
+					'module_langname'	=> 'ACP_USER_WARNINGS',
+					'module_mode'		=> 'warnings',
+					'module_auth'		=> 'acl_a_user',
+					'module_display'	=> false,
+					'after'				=> array('feedback', 'ACP_USER_FEEDBACK'),
 				),
 			)),
 			array('module.add', array(
@@ -169,7 +176,9 @@ class release_3_0_6_rc1 extends \phpbb\db\migration\migration
 				'ACP_SERVER_CONFIGURATION',
 				array(
 					'module_basename'	=> 'acp_send_statistics',
-					'modes'				=> array('send_statistics'),
+					'module_langname'	=> 'ACP_SEND_STATISTICS',
+					'module_mode'		=> 'send_statistics',
+					'module_auth'		=> 'acl_a_server',
 				),
 			)),
 			array('module.add', array(
@@ -177,7 +186,10 @@ class release_3_0_6_rc1 extends \phpbb\db\migration\migration
 				'ACP_FORUM_BASED_PERMISSIONS',
 				array(
 					'module_basename'	=> 'acp_permissions',
-					'modes'				=> array('setting_forum_copy'),
+					'module_langname'	=> 'ACP_FORUM_PERMISSIONS_COPY',
+					'module_mode'		=> 'setting_forum_copy',
+					'module_auth'		=> 'acl_a_fauth && acl_a_authusers && acl_a_authgroups && acl_a_mauth',
+					'after'				=> array('setting_forum_local', 'ACP_FORUM_PERMISSIONS'),
 				),
 			)),
 			array('module.add', array(
@@ -185,7 +197,29 @@ class release_3_0_6_rc1 extends \phpbb\db\migration\migration
 				'MCP_REPORTS',
 				array(
 					'module_basename'	=> 'mcp_pm_reports',
-					'modes'				=> array('pm_reports','pm_reports_closed','pm_report_details'),
+					'module_langname'	=> 'MCP_PM_REPORTS_OPEN',
+					'module_mode'		=> 'pm_reports',
+					'module_auth'		=> 'acl_m_pm_report',
+				),
+			)),
+			array('module.add', array(
+				'mcp',
+				'MCP_REPORTS',
+				array(
+					'module_basename'	=> 'mcp_pm_reports',
+					'module_langname'	=> 'MCP_PM_REPORTS_CLOSED',
+					'module_mode'		=> 'pm_reports_closed',
+					'module_auth'		=> 'acl_m_pm_report',
+				),
+			)),
+			array('module.add', array(
+				'mcp',
+				'MCP_REPORTS',
+				array(
+					'module_basename'	=> 'mcp_pm_reports',
+					'module_langname'	=> 'MCP_PM_REPORT_DETAILS',
+					'module_mode'		=> 'pm_report_details',
+					'module_auth'		=> 'acl_m_pm_report',
 				),
 			)),
 			array('custom', array(array(&$this, 'add_newly_registered_group'))),
diff --git a/phpBB/phpbb/db/migration/data/v30x/release_3_0_8_rc1.php b/phpBB/phpbb/db/migration/data/v30x/release_3_0_8_rc1.php
index 22fd51543b..836cb4577a 100644
--- a/phpBB/phpbb/db/migration/data/v30x/release_3_0_8_rc1.php
+++ b/phpBB/phpbb/db/migration/data/v30x/release_3_0_8_rc1.php
@@ -36,7 +36,10 @@ class release_3_0_8_rc1 extends \phpbb\db\migration\migration
 				'ACP_MESSAGES',
 				array(
 					'module_basename'	=> 'acp_board',
-					'modes'				=> array('post'),
+					'module_langname'	=> 'ACP_POST_SETTINGS',
+					'module_mode'		=> 'post',
+					'module_auth'		=> 'acl_a_board',
+					'after'				=> array('message', 'ACP_MESSAGE_SETTINGS'),
 				),
 			)),
 			array('config.add', array('load_unreads_search', 1)),
@@ -55,9 +58,14 @@ class release_3_0_8_rc1 extends \phpbb\db\migration\migration
 		$result = $this->db->sql_query($sql);
 
 		$extension_groups_updated = array();
-		while ($lang_dir = $this->db->sql_fetchfield('lang_dir'))
+		while ($row = $this->db->sql_fetchrow($result))
 		{
-			$lang_dir = basename($lang_dir);
+			if (empty($row['lang_dir']))
+			{
+				continue;
+			}
+
+			$lang_dir = basename($row['lang_dir']);
 
 			// The language strings we need are either in language/.../acp/attachments.php
 			// in the update package if we're updating to 3.0.8-RC1 or later,
diff --git a/phpBB/phpbb/db/migration/data/v30x/release_3_0_9_rc1.php b/phpBB/phpbb/db/migration/data/v30x/release_3_0_9_rc1.php
index 06e46d522f..5f928df47c 100644
--- a/phpBB/phpbb/db/migration/data/v30x/release_3_0_9_rc1.php
+++ b/phpBB/phpbb/db/migration/data/v30x/release_3_0_9_rc1.php
@@ -34,7 +34,7 @@ class release_3_0_9_rc1 extends \phpbb\db\migration\migration
 						// this column was removed from the database updater
 						// after 3.0.9-RC3 was released. It might still exist
 						// in 3.0.9-RCX installations and has to be dropped as
-						// soon as the db_tools class is capable of properly
+						// soon as the \phpbb\db\tools\tools class is capable of properly
 						// removing a primary key.
 						// 'attempt_id'			=> array('UINT', NULL, 'auto_increment'),
 						'attempt_ip'			=> array('VCHAR:40', ''),
diff --git a/phpBB/phpbb/db/migration/data/v310/acp_prune_users_module.php b/phpBB/phpbb/db/migration/data/v310/acp_prune_users_module.php
index 0ca4f2f19c..725c57ca86 100644
--- a/phpBB/phpbb/db/migration/data/v310/acp_prune_users_module.php
+++ b/phpBB/phpbb/db/migration/data/v310/acp_prune_users_module.php
@@ -13,7 +13,7 @@
 
 namespace phpbb\db\migration\data\v310;
 
-class acp_prune_users_module extends \phpbb\db\migration\migration
+class acp_prune_users_module extends \phpbb\db\migration\container_aware_migration
 {
 	public function effectively_installed()
 	{
@@ -70,12 +70,7 @@ class acp_prune_users_module extends \phpbb\db\migration\migration
 		$acp_cat_users_id = (int) $this->db->sql_fetchfield('module_id');
 		$this->db->sql_freeresult($result);
 
-		if (!class_exists('\acp_modules'))
-		{
-			include($this->phpbb_root_path . 'includes/acp/acp_modules.' . $this->php_ext);
-		}
-		$module_manager = new \acp_modules();
-		$module_manager->module_class = 'acp';
-		$module_manager->move_module($acp_prune_users_id, $acp_cat_users_id);
+		$module_manager = $this->container->get('module.manager');
+		$module_manager->move_module($acp_prune_users_id, $acp_cat_users_id, 'acp');
 	}
 }
diff --git a/phpBB/phpbb/db/migration/data/v310/auth_provider_oauth.php b/phpBB/phpbb/db/migration/data/v310/auth_provider_oauth.php
index 2d51bd53e4..1e2024a071 100644
--- a/phpBB/phpbb/db/migration/data/v310/auth_provider_oauth.php
+++ b/phpBB/phpbb/db/migration/data/v310/auth_provider_oauth.php
@@ -17,7 +17,12 @@ class auth_provider_oauth extends \phpbb\db\migration\migration
 {
 	public function effectively_installed()
 	{
-		return $this->db_tools->sql_table_exists($this->table_prefix . 'auth_provider_oauth');
+		return $this->db_tools->sql_table_exists($this->table_prefix . 'oauth_tokens');
+	}
+
+	static public function depends_on()
+	{
+		return array('\phpbb\db\migration\data\v30x\release_3_0_0');
 	}
 
 	public function update_schema()
@@ -69,7 +74,9 @@ class auth_provider_oauth extends \phpbb\db\migration\migration
 				'UCP_PROFILE',
 				array(
 					'module_basename'	=> 'ucp_auth_link',
-					'modes'				=> array('auth_link'),
+					'module_langname'	=> 'UCP_AUTH_LINK_MANAGE',
+					'module_mode'		=> 'auth_link',
+					'module_auth'		=> 'authmethod_oauth',
 				),
 			)),
 		);
diff --git a/phpBB/phpbb/db/migration/data/v310/contact_admin_acp_module.php b/phpBB/phpbb/db/migration/data/v310/contact_admin_acp_module.php
index 20bd547ac3..e48a9a1d3d 100644
--- a/phpBB/phpbb/db/migration/data/v310/contact_admin_acp_module.php
+++ b/phpBB/phpbb/db/migration/data/v310/contact_admin_acp_module.php
@@ -23,7 +23,9 @@ class contact_admin_acp_module extends \phpbb\db\migration\migration
 				'ACP_BOARD_CONFIGURATION',
 				array(
 					'module_basename'	=> 'acp_contact',
-					'modes'				=> array('contact'),
+					'module_langname'	=> 'ACP_CONTACT_SETTINGS',
+					'module_mode'		=> 'contact',
+					'module_auth'		=> 'acl_a_board',
 				),
 			)),
 		);
diff --git a/phpBB/phpbb/db/migration/data/v310/dev.php b/phpBB/phpbb/db/migration/data/v310/dev.php
index f037191c2a..9cc953ad8d 100644
--- a/phpBB/phpbb/db/migration/data/v310/dev.php
+++ b/phpBB/phpbb/db/migration/data/v310/dev.php
@@ -13,7 +13,7 @@
 
 namespace phpbb\db\migration\data\v310;
 
-class dev extends \phpbb\db\migration\migration
+class dev extends \phpbb\db\migration\container_aware_migration
 {
 	public function effectively_installed()
 	{
@@ -125,7 +125,9 @@ class dev extends \phpbb\db\migration\migration
 				'ACP_GROUPS',
 				array(
 					'module_basename'	=> 'acp_groups',
-					'modes'				=> array('position'),
+					'module_langname'	=> 'ACP_GROUPS_POSITION',
+					'module_mode'		=> 'position',
+					'module_auth'		=> 'acl_a_group',
 				),
 			)),
 			array('module.add', array(
@@ -133,7 +135,9 @@ class dev extends \phpbb\db\migration\migration
 				'ACP_ATTACHMENTS',
 				array(
 					'module_basename'	=> 'acp_attachments',
-					'modes'				=> array('manage'),
+					'module_langname'	=> 'ACP_MANAGE_ATTACHMENTS',
+					'module_mode'		=> 'manage',
+					'module_auth'		=> 'acl_a_attach',
 				),
 			)),
 			array('module.add', array(
@@ -141,7 +145,19 @@ class dev extends \phpbb\db\migration\migration
 				'ACP_STYLE_MANAGEMENT',
 				array(
 					'module_basename'	=> 'acp_styles',
-					'modes'				=> array('install', 'cache'),
+					'module_langname'	=> 'ACP_STYLES_INSTALL',
+					'module_mode'		=> 'install',
+					'module_auth'		=> 'acl_a_styles',
+				),
+			)),
+			array('module.add', array(
+				'acp',
+				'ACP_STYLE_MANAGEMENT',
+				array(
+					'module_basename'	=> 'acp_styles',
+					'module_langname'	=> 'ACP_STYLES_CACHE',
+					'module_mode'		=> 'cache',
+					'module_auth'		=> 'acl_a_styles',
 				),
 			)),
 			array('module.add', array(
@@ -149,7 +165,8 @@ class dev extends \phpbb\db\migration\migration
 				'UCP_PROFILE',
 				array(
 					'module_basename'	=> 'ucp_profile',
-					'modes'				=> array('autologin_keys'),
+					'module_langname'	=> 'UCP_PROFILE_AUTOLOGIN_KEYS',
+					'module_mode'		=> 'autologin_keys',
 				),
 			)),
 			// Module will be renamed later
@@ -204,18 +221,13 @@ class dev extends \phpbb\db\migration\migration
 		$language_management_module_id = $this->db->sql_fetchfield('module_id');
 		$this->db->sql_freeresult($result);
 
-		if (!class_exists('acp_modules'))
-		{
-			include($this->phpbb_root_path . 'includes/acp/acp_modules.' . $this->php_ext);
-		}
 		// acp_modules calls adm_back_link, which is undefined at this point
 		if (!function_exists('adm_back_link'))
 		{
 			include($this->phpbb_root_path . 'includes/functions_acp.' . $this->php_ext);
 		}
-		$module_manager = new \acp_modules();
-		$module_manager->module_class = 'acp';
-		$module_manager->move_module($language_module_id, $language_management_module_id);
+		$module_manager = $this->container->get('module.manager');
+		$module_manager->move_module($language_module_id, $language_management_module_id, 'acp');
 	}
 
 	public function update_ucp_pm_basename()
diff --git a/phpBB/phpbb/db/migration/data/v310/extensions.php b/phpBB/phpbb/db/migration/data/v310/extensions.php
index 3171435482..2e7c5c5316 100644
--- a/phpBB/phpbb/db/migration/data/v310/extensions.php
+++ b/phpBB/phpbb/db/migration/data/v310/extensions.php
@@ -66,7 +66,9 @@ class extensions extends \phpbb\db\migration\migration
 				'ACP_EXTENSION_MANAGEMENT',
 				array(
 					'module_basename'	=> 'acp_extensions',
-					'modes'				=> array('main'),
+					'module_langname'	=> 'ACP_EXTENSIONS',
+					'module_mode'		=> 'main',
+					'module_auth'		=> 'acl_a_extensions',
 				),
 			)),
 			array('permission.add', array('a_extensions', true, 'a_styles')),
diff --git a/phpBB/phpbb/db/migration/data/v310/notifications.php b/phpBB/phpbb/db/migration/data/v310/notifications.php
index f4d012b5ac..789aaa3ba9 100644
--- a/phpBB/phpbb/db/migration/data/v310/notifications.php
+++ b/phpBB/phpbb/db/migration/data/v310/notifications.php
@@ -85,7 +85,9 @@ class notifications extends \phpbb\db\migration\migration
 				'UCP_MAIN',
 				array(
 					'module_basename'	=> 'ucp_notifications',
-					'modes'				=> array('notification_list'),
+					'module_langname'	=> 'UCP_NOTIFICATION_LIST',
+					'module_mode'		=> 'notification_list',
+					'module_auth'		=> 'cfg_allow_board_notifications',
 				),
 			)),
 			array('module.add', array(
@@ -93,7 +95,8 @@ class notifications extends \phpbb\db\migration\migration
 				'UCP_PREFS',
 				array(
 					'module_basename'	=> 'ucp_notifications',
-					'modes'				=> array('notification_options'),
+					'module_langname'	=> 'UCP_NOTIFICATION_OPTIONS',
+					'module_mode'		=> 'notification_options',
 				),
 			)),
 			array('config.add', array('load_notifications', 1)),
diff --git a/phpBB/phpbb/db/migration/data/v310/softdelete_mcp_modules.php b/phpBB/phpbb/db/migration/data/v310/softdelete_mcp_modules.php
index 5e68db5889..90dab991e1 100644
--- a/phpBB/phpbb/db/migration/data/v310/softdelete_mcp_modules.php
+++ b/phpBB/phpbb/db/migration/data/v310/softdelete_mcp_modules.php
@@ -45,7 +45,9 @@ class softdelete_mcp_modules extends \phpbb\db\migration\migration
 				'MCP_QUEUE',
 				array(
 					'module_basename'	=> 'mcp_queue',
-					'modes'				=> array('deleted_topics'),
+					'module_langname'	=> 'MCP_QUEUE_DELETED_TOPICS',
+					'module_mode'		=> 'deleted_topics',
+					'module_auth'		=> 'aclf_m_approve',
 				),
 			)),
 			array('module.add', array(
@@ -53,7 +55,9 @@ class softdelete_mcp_modules extends \phpbb\db\migration\migration
 				'MCP_QUEUE',
 				array(
 					'module_basename'	=> 'mcp_queue',
-					'modes'				=> array('deleted_posts'),
+					'module_langname'	=> 'MCP_QUEUE_DELETED_POSTS',
+					'module_mode'		=> 'deleted_posts',
+					'module_auth'		=> 'aclf_m_approve',
 				),
 			)),
 		);
diff --git a/phpBB/phpbb/db/migration/data/v310/style_update_p1.php b/phpBB/phpbb/db/migration/data/v310/style_update_p1.php
index 2c7b7edf2e..a7e30a9cb7 100644
--- a/phpBB/phpbb/db/migration/data/v310/style_update_p1.php
+++ b/phpBB/phpbb/db/migration/data/v310/style_update_p1.php
@@ -133,7 +133,7 @@ class style_update_p1 extends \phpbb\db\migration\migration
 		}
 
 		// Remove old entries from styles table
-		if (!sizeof($valid_styles))
+		if (!count($valid_styles))
 		{
 			// No valid styles: remove everything and add prosilver
 			$this->sql_query('DELETE FROM ' . STYLES_TABLE);
@@ -160,12 +160,12 @@ class style_update_p1 extends \phpbb\db\migration\migration
 				FROM ' . STYLES_TABLE . "
 				WHERE style_name = 'prosilver'";
 			$result = $this->sql_query($sql);
-			$default_style = $this->db->sql_fetchfield('style_id');
+			$default_style = (int) $this->db->sql_fetchfield('style_id');
 			$this->db->sql_freeresult($result);
 
 			$this->config->set('default_style', $default_style);
 
-			$sql = 'UPDATE ' . USERS_TABLE . ' SET user_style = 0';
+			$sql = 'UPDATE ' . USERS_TABLE . ' SET user_style = ' .  (int) $default_style;
 			$this->sql_query($sql);
 		}
 		else
@@ -183,9 +183,9 @@ class style_update_p1 extends \phpbb\db\migration\migration
 			}
 
 			// Reset styles for users
-			$this->sql_query('UPDATE ' . USERS_TABLE . '
-				SET user_style = 0
-				WHERE ' . $this->db->sql_in_set('user_style', $valid_styles, true));
+			$this->sql_query('UPDATE ' . USERS_TABLE . "
+				SET user_style = '" . (int) $valid_styles[0] . "'
+				WHERE " . $this->db->sql_in_set('user_style', $valid_styles, true));
 		}
 	}
 }
diff --git a/phpBB/phpbb/db/migration/data/v310/teampage.php b/phpBB/phpbb/db/migration/data/v310/teampage.php
index f8edbc3492..3a37b17e97 100644
--- a/phpBB/phpbb/db/migration/data/v310/teampage.php
+++ b/phpBB/phpbb/db/migration/data/v310/teampage.php
@@ -93,13 +93,13 @@ class teampage extends \phpbb\db\migration\migration
 				$teampage_entries[] = array(
 					'group_id'			=> (int) $row['group_id'],
 					'teampage_name'		=> '',
-					'teampage_position'	=> sizeof($teampage_entries) + 1,
+					'teampage_position'	=> count($teampage_entries) + 1,
 					'teampage_parent'	=> 0,
 				);
 			}
 			$this->db->sql_freeresult($result);
 
-			if (sizeof($teampage_entries))
+			if (count($teampage_entries))
 			{
 				$this->db->sql_multi_insert(TEAMPAGE_TABLE, $teampage_entries);
 			}
diff --git a/phpBB/phpbb/db/migration/data/v310/timezone.php b/phpBB/phpbb/db/migration/data/v310/timezone.php
index 1f6b47ad50..03a8d1ab34 100644
--- a/phpBB/phpbb/db/migration/data/v310/timezone.php
+++ b/phpBB/phpbb/db/migration/data/v310/timezone.php
@@ -103,7 +103,7 @@ class timezone extends \phpbb\db\migration\migration
 	*/
 	public function convert_phpbb30_timezone($timezone, $dst)
 	{
-		$offset = $timezone + $dst;
+		$offset = (float) $timezone + (int) $dst;
 
 		switch ($timezone)
 		{
diff --git a/phpBB/phpbb/db/migration/data/v31x/update_custom_bbcodes_with_idn.php b/phpBB/phpbb/db/migration/data/v31x/update_custom_bbcodes_with_idn.php
index 854ed1f568..14b7b7b0f6 100644
--- a/phpBB/phpbb/db/migration/data/v31x/update_custom_bbcodes_with_idn.php
+++ b/phpBB/phpbb/db/migration/data/v31x/update_custom_bbcodes_with_idn.php
@@ -45,7 +45,6 @@ class update_custom_bbcodes_with_idn extends \phpbb\db\migration\migration
 		$sql_ary = array();
 		while ($row = $this->db->sql_fetchrow($result))
 		{
-			$data = array();
 			if (preg_match('/(URL|LOCAL_URL|RELATIVE_URL)/', $row['bbcode_match']))
 			{
 				$data = $bbcodes->build_regexp($row['bbcode_match'], $row['bbcode_tpl']);
diff --git a/phpBB/phpbb/db/migration/data/v31x/v3112.php b/phpBB/phpbb/db/migration/data/v31x/v3112.php
new file mode 100644
index 0000000000..0d75d35184
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v31x/v3112.php
@@ -0,0 +1,36 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v31x;
+
+class v3112 extends \phpbb\db\migration\migration
+{
+	public function effectively_installed()
+	{
+		return phpbb_version_compare($this->config['version'], '3.1.12', '>=');
+	}
+
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v31x\v3111',
+		);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.update', array('version', '3.1.12')),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v320/.htaccess b/phpBB/phpbb/db/migration/data/v320/.htaccess
new file mode 100644
index 0000000000..44242b5418
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v320/.htaccess
@@ -0,0 +1,33 @@
+# With Apache 2.4 the "Order, Deny" syntax has been deprecated and moved from
+# module mod_authz_host to a new module called mod_access_compat (which may be
+# disabled) and a new "Require" syntax has been introduced to mod_authz_host.
+# We could just conditionally provide both versions, but unfortunately Apache
+# does not explicitly tell us its version if the module mod_version is not
+# available. In this case, we check for the availability of module
+# mod_authz_core (which should be on 2.4 or higher only) as a best guess.
+<IfModule mod_version.c>
+	<IfVersion < 2.4>
+		<Files "*">
+			Order Allow,Deny
+			Deny from All
+		</Files>
+	</IfVersion>
+	<IfVersion >= 2.4>
+		<Files "*">
+			Require all denied
+		</Files>
+	</IfVersion>
+</IfModule>
+<IfModule !mod_version.c>
+	<IfModule !mod_authz_core.c>
+		<Files "*">
+			Order Allow,Deny
+			Deny from All
+		</Files>
+	</IfModule>
+	<IfModule mod_authz_core.c>
+		<Files "*">
+			Require all denied
+		</Files>
+	</IfModule>
+</IfModule>
diff --git a/phpBB/phpbb/db/migration/data/v320/add_help_phpbb.php b/phpBB/phpbb/db/migration/data/v320/add_help_phpbb.php
new file mode 100644
index 0000000000..804adc4490
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v320/add_help_phpbb.php
@@ -0,0 +1,48 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v320;
+
+class add_help_phpbb extends \phpbb\db\migration\migration
+{
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v320\v320rc1',
+		);
+	}
+
+	public function effectively_installed()
+	{
+		return isset($this->config['help_send_statistics']);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.add', array('help_send_statistics', true)),
+			array('config.add', array('help_send_statistics_time', 0)),
+			array('module.remove', array('acp', false, 'ACP_SEND_STATISTICS')),
+			array('module.add', array(
+				'acp',
+				'ACP_SERVER_CONFIGURATION',
+				array(
+					'module_basename'	=> 'acp_help_phpbb',
+					'module_langname'	=> 'ACP_HELP_PHPBB',
+					'module_mode'		=> 'help_phpbb',
+					'module_auth'		=> 'acl_a_server',
+				),
+			)),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v320/allowed_schemes_links.php b/phpBB/phpbb/db/migration/data/v320/allowed_schemes_links.php
new file mode 100644
index 0000000000..726822bc71
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v320/allowed_schemes_links.php
@@ -0,0 +1,31 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v320;
+
+class allowed_schemes_links extends \phpbb\db\migration\migration
+{
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v320\dev',
+		);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.add', array('allowed_schemes_links', 'http,https,ftp')),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v320/announce_global_permission.php b/phpBB/phpbb/db/migration/data/v320/announce_global_permission.php
new file mode 100644
index 0000000000..7afecb884b
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v320/announce_global_permission.php
@@ -0,0 +1,43 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v320;
+
+class announce_global_permission extends \phpbb\db\migration\migration
+{
+	public function effectively_installed()
+	{
+		$sql = 'SELECT auth_option_id
+			FROM ' . ACL_OPTIONS_TABLE . "
+			WHERE auth_option = 'f_announce_global'";
+		$result = $this->db->sql_query($sql);
+		$auth_option_id = $this->db->sql_fetchfield('auth_option_id');
+		$this->db->sql_freeresult($result);
+
+		return $auth_option_id !== false;
+	}
+
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v320\dev',
+		);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('permission.add', array('f_announce_global', false, 'f_announce')),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v320/cookie_notice.php b/phpBB/phpbb/db/migration/data/v320/cookie_notice.php
new file mode 100644
index 0000000000..75cb03b3ef
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v320/cookie_notice.php
@@ -0,0 +1,31 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v320;
+
+class cookie_notice extends \phpbb\db\migration\migration
+{
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v320\v320rc2',
+		);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.add', array('cookie_notice', false)),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v320/default_data_type_ids.php b/phpBB/phpbb/db/migration/data/v320/default_data_type_ids.php
new file mode 100644
index 0000000000..65e5b3fa73
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v320/default_data_type_ids.php
@@ -0,0 +1,361 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v320;
+
+class default_data_type_ids extends \phpbb\db\migration\migration
+{
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v320\v320a2',
+			'\phpbb\db\migration\data\v320\oauth_states',
+		);
+	}
+
+	public function update_schema()
+	{
+		return array(
+			'change_columns'	=> array(
+				$this->table_prefix . 'acl_users'			=> array(
+					'user_id'		=> array('ULINT', 0),
+				),
+				$this->table_prefix . 'attachments'			=> array(
+					'attach_id'		=> array('ULINT', null, 'auto_increment'),
+					'post_msg_id'	=> array('ULINT', 0),
+					'poster_id'		=> array('ULINT', 0),
+					'topic_id'		=> array('ULINT', 0),
+				),
+				$this->table_prefix . 'banlist'				=> array(
+					'ban_id'		=> array('ULINT', null, 'auto_increment'),
+					'ban_userid'	=> array('ULINT', 0),
+				),
+				$this->table_prefix . 'bookmarks'			=> array(
+					'topic_id'		=> array('ULINT', 0),
+					'user_id'		=> array('ULINT', 0),
+				),
+				$this->table_prefix . 'bots'				=> array(
+					'bot_id'		=> array('ULINT', null, 'auto_increment'),
+					'user_id'		=> array('ULINT', 0),
+				),
+				$this->table_prefix . 'drafts'				=> array(
+					'draft_id'		=> array('ULINT', null, 'auto_increment'),
+					'user_id'		=> array('ULINT', 0),
+					'topic_id'		=> array('ULINT', 0),
+				),
+				$this->table_prefix . 'forums'				=> array(
+					'forum_last_post_id'	=> array('ULINT', 0),
+					'forum_last_poster_id'	=> array('ULINT', 0),
+				),
+				$this->table_prefix . 'forums_access'		=> array(
+					'user_id'		=> array('ULINT', 0),
+				),
+				$this->table_prefix . 'forums_track'		=> array(
+					'user_id'		=> array('ULINT', 0),
+				),
+				$this->table_prefix . 'forums_watch'		=> array(
+					'user_id'		=> array('ULINT', 0),
+				),
+				$this->table_prefix . 'log'					=> array(
+					'log_id'		=> array('ULINT', null, 'auto_increment'),
+					'post_id'		=> array('ULINT', 0),
+					'reportee_id'	=> array('ULINT', 0),
+					'user_id'		=> array('ULINT', 0),
+					'topic_id'		=> array('ULINT', 0),
+				),
+				$this->table_prefix . 'login_attempts'		=> array(
+					'user_id'		=> array('ULINT', 0),
+				),
+				$this->table_prefix . 'moderator_cache'		=> array(
+					'user_id'		=> array('ULINT', 0),
+				),
+				$this->table_prefix . 'notifications'		=> array(
+					'user_id'		=> array('ULINT', 0),
+				),
+				$this->table_prefix . 'oauth_accounts'		=> array(
+					'user_id'		=> array('ULINT', 0),
+				),
+				$this->table_prefix . 'oauth_states'		=> array(
+					'user_id'		=> array('ULINT', 0),
+				),
+				$this->table_prefix . 'oauth_tokens'		=> array(
+					'user_id'		=> array('ULINT', 0),
+				),
+				$this->table_prefix . 'poll_options'		=> array(
+					'topic_id'		=> array('ULINT', 0),
+				),
+				$this->table_prefix . 'poll_votes'			=> array(
+					'topic_id'		=> array('ULINT', 0),
+					'vote_user_id'	=> array('ULINT', 0),
+				),
+				$this->table_prefix . 'posts'				=> array(
+					'post_id'			=> array('ULINT', null, 'auto_increment'),
+					'poster_id'			=> array('ULINT', 0),
+					'post_delete_user'	=> array('ULINT', 0),
+					'post_edit_user'	=> array('ULINT', 0),
+					'topic_id'			=> array('ULINT', 0),
+				),
+				$this->table_prefix . 'privmsgs'			=> array(
+					'author_id'			=> array('ULINT', 0),
+					'message_edit_user'	=> array('ULINT', 0),
+					'msg_id'			=> array('ULINT', null, 'auto_increment'),
+				),
+				$this->table_prefix . 'privmsgs_folder'		=> array(
+					'user_id'		=> array('ULINT', 0),
+				),
+				$this->table_prefix . 'privmsgs_rules'		=> array(
+					'rule_user_id'	=> array('ULINT', 0),
+					'user_id'		=> array('ULINT', 0),
+				),
+				$this->table_prefix . 'privmsgs_to'			=> array(
+					'author_id'		=> array('ULINT', 0),
+					'msg_id'		=> array('ULINT', 0),
+					'user_id'		=> array('ULINT', 0),
+				),
+				$this->table_prefix . 'profile_fields_data'	=> array(
+					'user_id'		=> array('ULINT', 0),
+				),
+				$this->table_prefix . 'reports'				=> array(
+					'report_id'		=> array('ULINT', 0),
+					'pm_id'			=> array('ULINT', 0),
+					'post_id'		=> array('ULINT', 0),
+					'user_id'		=> array('ULINT', 0),
+				),
+				$this->table_prefix . 'search_wordlist'		=> array(
+					'word_id'		=> array('ULINT', null, 'auto_increment'),
+				),
+				$this->table_prefix . 'search_wordmatch'	=> array(
+					'post_id'		=> array('ULINT', 0),
+					'word_id'		=> array('ULINT', 0),
+				),
+				$this->table_prefix . 'sessions'			=> array(
+					'session_user_id'	=> array('ULINT', 0),
+				),
+				$this->table_prefix . 'sessions_keys'		=> array(
+					'user_id'		=> array('ULINT', 0),
+				),
+				$this->table_prefix . 'topics'				=> array(
+					'topic_id'				=> array('ULINT', null, 'auto_increment'),
+					'topic_poster'			=> array('ULINT', 0),
+					'topic_first_post_id'	=> array('ULINT', 0),
+					'topic_last_post_id'	=> array('ULINT', 0),
+					'topic_last_poster_id'	=> array('ULINT', 0),
+					'topic_moved_id'		=> array('ULINT', 0),
+					'topic_delete_user'		=> array('ULINT', 0),
+				),
+				$this->table_prefix . 'topics_track'		=> array(
+					'user_id'		=> array('ULINT', 0),
+					'topic_id'		=> array('ULINT', 0),
+				),
+				$this->table_prefix . 'topics_posted'		=> array(
+					'user_id'		=> array('ULINT', 0),
+					'topic_id'		=> array('ULINT', 0),
+				),
+				$this->table_prefix . 'topics_watch'		=> array(
+					'user_id'		=> array('ULINT', 0),
+					'topic_id'		=> array('ULINT', 0),
+				),
+				$this->table_prefix . 'user_notifications'	=> array(
+					'item_id'		=> array('ULINT', 0),
+					'user_id'		=> array('ULINT', 0),
+				),
+				$this->table_prefix . 'user_group'			=> array(
+					'user_id'		=> array('ULINT', 0),
+				),
+				$this->table_prefix . 'users'				=> array(
+					'user_id'		=> array('ULINT', null, 'auto_increment'),
+				),
+				$this->table_prefix . 'warnings'			=> array(
+					'log_id'		=> array('ULINT', 0),
+					'user_id'		=> array('ULINT', 0),
+					'post_id'		=> array('ULINT', 0),
+				),
+				$this->table_prefix . 'words'				=> array(
+					'word_id'		=> array('ULINT', null, 'auto_increment'),
+				),
+				$this->table_prefix . 'zebra'			=> array(
+					'user_id'		=> array('ULINT', 0),
+					'zebra_id'		=> array('ULINT', 0),
+				),
+			),
+		);
+	}
+
+	public function revert_schema()
+	{
+		return array(
+			'change_columns'	=> array(
+				$this->table_prefix . 'acl_users'			=> array(
+					'user_id'		=> array('UINT', 0),
+				),
+				$this->table_prefix . 'attachments'			=> array(
+					'attach_id'		=> array('UINT', null, 'auto_increment'),
+					'post_msg_id'	=> array('UINT', 0),
+					'poster_id'		=> array('UINT', 0),
+					'topic_id'		=> array('UINT', 0),
+				),
+				$this->table_prefix . 'banlist'				=> array(
+					'ban_id'		=> array('UINT', null, 'auto_increment'),
+					'ban_userid'	=> array('UINT', 0),
+				),
+				$this->table_prefix . 'bookmarks'			=> array(
+					'topic_id'		=> array('UINT', 0),
+					'user_id'		=> array('UINT', 0),
+				),
+				$this->table_prefix . 'bots'				=> array(
+					'bot_id'		=> array('UINT', null, 'auto_increment'),
+					'user_id'		=> array('UINT', 0),
+				),
+				$this->table_prefix . 'drafts'				=> array(
+					'draft_id'		=> array('UINT', null, 'auto_increment'),
+					'user_id'		=> array('UINT', 0),
+					'topic_id'		=> array('UINT', 0),
+				),
+				$this->table_prefix . 'forums'				=> array(
+					'forum_last_post_id'	=> array('UINT', 0),
+					'forum_last_poster_id'	=> array('UINT', 0),
+				),
+				$this->table_prefix . 'forums_access'		=> array(
+					'user_id'		=> array('UINT', 0),
+				),
+				$this->table_prefix . 'forums_track'		=> array(
+					'user_id'		=> array('UINT', 0),
+				),
+				$this->table_prefix . 'forums_watch'		=> array(
+					'user_id'		=> array('UINT', 0),
+				),
+				$this->table_prefix . 'log'					=> array(
+					'log_id'		=> array('UINT', null, 'auto_increment'),
+					'post_id'		=> array('UINT', 0),
+					'reportee_id'	=> array('UINT', 0),
+					'user_id'		=> array('UINT', 0),
+					'topic_id'		=> array('UINT', 0),
+				),
+				$this->table_prefix . 'login_attempts'		=> array(
+					'user_id'		=> array('UINT', 0),
+				),
+				$this->table_prefix . 'moderator_cache'		=> array(
+					'user_id'		=> array('UINT', 0),
+				),
+				$this->table_prefix . 'notifications'		=> array(
+					'user_id'		=> array('UINT', 0),
+				),
+				$this->table_prefix . 'oauth_accounts'		=> array(
+					'user_id'		=> array('UINT', 0),
+				),
+				$this->table_prefix . 'oauth_states'		=> array(
+					'user_id'		=> array('UINT', 0),
+				),
+				$this->table_prefix . 'oauth_tokens'		=> array(
+					'user_id'		=> array('UINT', 0),
+				),
+				$this->table_prefix . 'poll_options'		=> array(
+					'topic_id'		=> array('UINT', 0),
+				),
+				$this->table_prefix . 'poll_votes'			=> array(
+					'topic_id'		=> array('UINT', 0),
+					'vote_user_id'	=> array('UINT', 0),
+				),
+				$this->table_prefix . 'posts'				=> array(
+					'post_id'			=> array('UINT', null, 'auto_increment'),
+					'poster_id'			=> array('UINT', 0),
+					'post_delete_user'	=> array('UINT', 0),
+					'post_edit_user'	=> array('UINT', 0),
+					'topic_id'			=> array('UINT', 0),
+				),
+				$this->table_prefix . 'privmsgs'			=> array(
+					'author_id'			=> array('UINT', 0),
+					'message_edit_user'	=> array('UINT', 0),
+					'msg_id'			=> array('UINT', null, 'auto_increment'),
+				),
+				$this->table_prefix . 'privmsgs_folder'		=> array(
+					'user_id'		=> array('UINT', 0),
+				),
+				$this->table_prefix . 'privmsgs_rules'		=> array(
+					'rule_user_id'	=> array('UINT', 0),
+					'user_id'		=> array('UINT', 0),
+				),
+				$this->table_prefix . 'privmsgs_to'			=> array(
+					'author_id'		=> array('UINT', 0),
+					'msg_id'		=> array('UINT', 0),
+					'user_id'		=> array('UINT', 0),
+				),
+				$this->table_prefix . 'profile_fields_data'	=> array(
+					'user_id'		=> array('UINT', 0),
+				),
+				$this->table_prefix . 'reports'				=> array(
+					'report_id'		=> array('UINT', 0),
+					'pm_id'			=> array('UINT', 0),
+					'post_id'		=> array('UINT', 0),
+					'user_id'		=> array('UINT', 0),
+				),
+				$this->table_prefix . 'search_wordlist'		=> array(
+					'word_id'		=> array('UINT', null, 'auto_increment'),
+				),
+				$this->table_prefix . 'search_wordmatch'	=> array(
+					'post_id'		=> array('UINT', 0),
+					'word_id'		=> array('UINT', 0),
+				),
+				$this->table_prefix . 'sessions'			=> array(
+					'session_user_id'	=> array('UINT', 0),
+				),
+				$this->table_prefix . 'sessions_keys'		=> array(
+					'user_id'		=> array('UINT', 0),
+				),
+				$this->table_prefix . 'topics'				=> array(
+					'topic_id'				=> array('UINT', null, 'auto_increment'),
+					'topic_poster'			=> array('UINT', 0),
+					'topic_first_post_id'	=> array('UINT', 0),
+					'topic_last_post_id'	=> array('UINT', 0),
+					'topic_last_poster_id'	=> array('UINT', 0),
+					'topic_moved_id'		=> array('UINT', 0),
+					'topic_delete_user'		=> array('UINT', 0),
+				),
+				$this->table_prefix . 'topics_track'		=> array(
+					'user_id'		=> array('UINT', 0),
+					'topic_id'		=> array('UINT', 0),
+				),
+				$this->table_prefix . 'topics_posted'		=> array(
+					'user_id'		=> array('UINT', 0),
+					'topic_id'		=> array('UINT', 0),
+				),
+				$this->table_prefix . 'topics_watch'		=> array(
+					'user_id'		=> array('UINT', 0),
+					'topic_id'		=> array('UINT', 0),
+				),
+				$this->table_prefix . 'user_notifications'	=> array(
+					'item_id'		=> array('UINT', 0),
+					'user_id'		=> array('UINT', 0),
+				),
+				$this->table_prefix . 'user_group'			=> array(
+					'user_id'		=> array('UINT', 0),
+				),
+				$this->table_prefix . 'users'				=> array(
+					'user_id'		=> array('UINT', null, 'auto_increment'),
+				),
+				$this->table_prefix . 'warnings'			=> array(
+					'log_id'		=> array('UINT', 0),
+					'user_id'		=> array('UINT', 0),
+					'post_id'		=> array('UINT', 0),
+				),
+				$this->table_prefix . 'words'				=> array(
+					'word_id'		=> array('UINT', null, 'auto_increment'),
+				),
+				$this->table_prefix . 'zebra'			=> array(
+					'user_id'		=> array('UINT', 0),
+					'zebra_id'		=> array('UINT', 0),
+				),
+			),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v320/dev.php b/phpBB/phpbb/db/migration/data/v320/dev.php
new file mode 100644
index 0000000000..ad2da3c1f4
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v320/dev.php
@@ -0,0 +1,36 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v320;
+
+class dev extends \phpbb\db\migration\container_aware_migration
+{
+	public function effectively_installed()
+	{
+		return version_compare($this->config['version'], '3.2.0-dev', '>=');
+	}
+
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v31x\v316',
+		);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.update', array('version', '3.2.0-dev')),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v320/font_awesome_update.php b/phpBB/phpbb/db/migration/data/v320/font_awesome_update.php
new file mode 100644
index 0000000000..817b638037
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v320/font_awesome_update.php
@@ -0,0 +1,36 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v320;
+
+class font_awesome_update extends \phpbb\db\migration\migration
+{
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v320\dev',
+		);
+	}
+
+	public function effectively_installed()
+	{
+		return isset($this->config['load_font_awesome_url']);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.add', array('load_font_awesome_url', 'https://maxcdn.bootstrapcdn.com/font-awesome/4.4.0/css/font-awesome.min.css')),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v320/icons_alt.php b/phpBB/phpbb/db/migration/data/v320/icons_alt.php
new file mode 100644
index 0000000000..80132e579e
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v320/icons_alt.php
@@ -0,0 +1,46 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v320;
+
+class icons_alt extends \phpbb\db\migration\migration
+{
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v320\dev',
+		);
+	}
+
+	public function update_schema()
+	{
+		return array(
+			'add_columns'        => array(
+				$this->table_prefix . 'icons'        => array(
+					'icons_alt'    => array('VCHAR', '', 'after' => 'icons_height'),
+				),
+			),
+		);
+	}
+
+	public function revert_schema()
+	{
+		return array(
+			'drop_columns'        => array(
+				$this->table_prefix . 'icons'        => array(
+					'icons_alt',
+				),
+			),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v320/log_post_id.php b/phpBB/phpbb/db/migration/data/v320/log_post_id.php
new file mode 100644
index 0000000000..ead53c8138
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v320/log_post_id.php
@@ -0,0 +1,46 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v320;
+
+class log_post_id extends \phpbb\db\migration\migration
+{
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v320\dev',
+		);
+	}
+
+	public function update_schema()
+	{
+		return array(
+			'add_columns'        => array(
+				$this->table_prefix . 'log'        => array(
+					'post_id'    => array('UINT', 0, 'after' => 'topic_id'),
+				),
+			),
+		);
+	}
+
+	public function revert_schema()
+	{
+		return array(
+			'drop_columns'        => array(
+				$this->table_prefix . 'log'        => array(
+					'post_id',
+				),
+			),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v320/notifications_board.php b/phpBB/phpbb/db/migration/data/v320/notifications_board.php
new file mode 100644
index 0000000000..ac1b3a0f2c
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v320/notifications_board.php
@@ -0,0 +1,75 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v320;
+
+class notifications_board extends \phpbb\db\migration\migration
+{
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v320\dev',
+		);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.add', array('allow_board_notifications', 1)),
+			array('custom', array(array($this, 'update_user_subscriptions'))),
+			array('custom', array(array($this, 'update_module'))),
+		);
+	}
+
+	public function update_module()
+	{
+		$sql = 'UPDATE ' . MODULES_TABLE . "
+			SET module_auth = 'cfg_allow_board_notifications'
+			WHERE module_basename = 'ucp_notifications'
+				AND module_mode = 'notification_list'";
+		$this->sql_query($sql);
+	}
+
+	public function update_user_subscriptions()
+	{
+		$sql = 'UPDATE ' . USER_NOTIFICATIONS_TABLE . "
+			SET method = 'notification.method.board'
+			WHERE method = ''";
+		$this->sql_query($sql);
+	}
+
+	public function revert_data()
+	{
+		return array(
+			array('custom', array(array($this, 'revert_user_subscriptions'))),
+			array('custom', array(array($this, 'revert_module'))),
+		);
+	}
+
+	public function revert_user_subscriptions()
+	{
+		$sql = 'UPDATE ' . USER_NOTIFICATIONS_TABLE . "
+			SET method = ''
+			WHERE method = 'notification.method.board'";
+		$this->sql_query($sql);
+	}
+
+	public function revert_module()
+	{
+		$sql = 'UPDATE ' . MODULES_TABLE . "
+			SET auth = ''
+			WHERE module_basename = 'ucp_notifications'
+				AND module_mode = 'notification_list'";
+		$this->sql_query($sql);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v320/oauth_states.php b/phpBB/phpbb/db/migration/data/v320/oauth_states.php
new file mode 100644
index 0000000000..22ab2dabb3
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v320/oauth_states.php
@@ -0,0 +1,56 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v320;
+
+class oauth_states extends \phpbb\db\migration\migration
+{
+	static public function depends_on()
+	{
+		return array('\phpbb\db\migration\data\v310\auth_provider_oauth');
+	}
+
+	public function effectively_installed()
+	{
+		return $this->db_tools->sql_table_exists($this->table_prefix . 'oauth_states');
+	}
+
+	public function update_schema()
+	{
+		return array(
+			'add_tables'	=> array(
+				$this->table_prefix . 'oauth_states'	=> array(
+					'COLUMNS' => array(
+						'user_id'			=> array('UINT', 0),
+						'session_id'		=> array('CHAR:32', ''),
+						'provider'			=> array('VCHAR', ''),
+						'oauth_state'		=> array('VCHAR', ''),
+					),
+					'KEYS' => array(
+						'user_id'			=> array('INDEX', 'user_id'),
+						'provider'			=> array('INDEX', 'provider'),
+					),
+				),
+			),
+		);
+	}
+
+	public function revert_schema()
+	{
+		return array(
+			'drop_tables'	=> array(
+				$this->table_prefix . 'oauth_states',
+			),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v320/remote_upload_validation.php b/phpBB/phpbb/db/migration/data/v320/remote_upload_validation.php
new file mode 100644
index 0000000000..d61f6b96fd
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v320/remote_upload_validation.php
@@ -0,0 +1,31 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v320;
+
+class remote_upload_validation extends \phpbb\db\migration\migration
+{
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v320\v320a2',
+		);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.add', array('remote_upload_verify', '0')),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v320/remove_outdated_media.php b/phpBB/phpbb/db/migration/data/v320/remove_outdated_media.php
new file mode 100644
index 0000000000..88fe59ccc9
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v320/remove_outdated_media.php
@@ -0,0 +1,95 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v320;
+
+class remove_outdated_media extends \phpbb\db\migration\migration
+{
+	// Following constants were deprecated in 3.2
+	// and moved from constants.php to compatibility_globals.php,
+	// thus define them as class constants
+	const ATTACHMENT_CATEGORY_WM = 2;
+	const ATTACHMENT_CATEGORY_RM = 3;
+	const ATTACHMENT_CATEGORY_QUICKTIME = 6;
+
+	protected $cat_id = array(
+			self::ATTACHMENT_CATEGORY_WM,
+			self::ATTACHMENT_CATEGORY_RM,
+			self::ATTACHMENT_CATEGORY_QUICKTIME,
+		);
+
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v320\dev',
+		);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('custom', array(array($this, 'change_extension_group'))),
+		);
+	}
+
+	public function change_extension_group()
+	{
+		// select group ids of outdated media
+		$sql = 'SELECT group_id
+			FROM ' . EXTENSION_GROUPS_TABLE . '
+			WHERE ' . $this->db->sql_in_set('cat_id', $this->cat_id);
+		$result = $this->db->sql_query($sql);
+
+		$group_ids = array();
+		while ($group_id = (int) $this->db->sql_fetchfield('group_id'))
+		{
+			$group_ids[] = $group_id;
+		}
+		$this->db->sql_freeresult($result);
+
+		// nothing to do, admin has removed all the outdated media extension groups
+		if (empty($group_ids))
+		{
+			return true;
+		}
+
+		// get the group id of downloadable files
+		$sql = 'SELECT group_id
+			FROM ' . EXTENSION_GROUPS_TABLE . "
+			WHERE group_name = 'DOWNLOADABLE_FILES'";
+		$result = $this->db->sql_query($sql);
+		$download_id = (int) $this->db->sql_fetchfield('group_id');
+		$this->db->sql_freeresult($result);
+
+		if (empty($download_id))
+		{
+			$sql = 'UPDATE ' . EXTENSIONS_TABLE . '
+				SET group_id = 0
+				WHERE ' . $this->db->sql_in_set('group_id', $group_ids);
+		}
+		else
+		{
+			// move outdated media extensions to downloadable files
+			$sql = 'UPDATE ' . EXTENSIONS_TABLE . "
+				SET group_id = $download_id" . '
+				WHERE ' . $this->db->sql_in_set('group_id', $group_ids);
+		}
+
+		$this->db->sql_query($sql);
+
+		// delete the now empty, outdated media extension groups
+		$sql = 'DELETE FROM ' . EXTENSION_GROUPS_TABLE . '
+			WHERE ' . $this->db->sql_in_set('group_id', $group_ids);
+		$this->db->sql_query($sql);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v320/remove_profilefield_wlm.php b/phpBB/phpbb/db/migration/data/v320/remove_profilefield_wlm.php
new file mode 100644
index 0000000000..1cb9070bf9
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v320/remove_profilefield_wlm.php
@@ -0,0 +1,152 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v320;
+
+class remove_profilefield_wlm extends \phpbb\db\migration\migration
+{
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v320\dev',
+		);
+	}
+
+	public function update_schema()
+	{
+		return array(
+			'drop_columns'	=> array(
+				$this->table_prefix . 'profile_fields_data'			=> array(
+					'pf_phpbb_wlm',
+				),
+			),
+		);
+	}
+
+	public function revert_schema()
+	{
+		return array(
+			'add_columns'	=> array(
+				$this->table_prefix . 'profile_fields_data'			=> array(
+					'pf_phpbb_wlm'		=> array('VCHAR', ''),
+				),
+			),
+		);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('custom', array(array($this, 'delete_custom_profile_field_data'))),
+		);
+	}
+
+	public function revert_data()
+	{
+		return array(
+			array('custom', array(array($this, 'create_custom_field'))),
+		);
+	}
+
+	public function delete_custom_profile_field_data()
+	{
+		$field_id = $this->get_custom_profile_field_id();
+
+		$sql = 'DELETE FROM ' . PROFILE_FIELDS_TABLE . '
+			WHERE field_id = ' . (int) $field_id;
+		$this->db->sql_query($sql);
+
+		$sql = 'DELETE FROM ' . PROFILE_LANG_TABLE . '
+			WHERE field_id = ' . (int) $field_id;
+		$this->db->sql_query($sql);
+
+		$sql = 'DELETE FROM ' . PROFILE_FIELDS_LANG_TABLE . '
+			WHERE field_id = ' . (int) $field_id;
+		$this->db->sql_query($sql);
+	}
+
+	/**
+	 * Get custom profile field id
+	 * @return	int	custom profile filed id
+	 */
+	public function get_custom_profile_field_id()
+	{
+		$sql = 'SELECT field_id
+			FROM ' . PROFILE_FIELDS_TABLE . "
+			WHERE field_name = 'phpbb_wlm'";
+		$result = $this->db->sql_query($sql);
+		$field_id = (int) $this->db->sql_fetchfield('field_id');
+		$this->db->sql_freeresult($result);
+
+		return $field_id;
+	}
+
+	public function create_custom_field()
+	{
+		$sql = 'SELECT MAX(field_order) as max_field_order
+			FROM ' . PROFILE_FIELDS_TABLE;
+		$result = $this->db->sql_query($sql);
+		$max_field_order = (int) $this->db->sql_fetchfield('max_field_order');
+		$this->db->sql_freeresult($result);
+
+		$sql_ary = array(
+			'field_name'			=> 'phpbb_wlm',
+			'field_type'			=> 'profilefields.type.string',
+			'field_ident'			=> 'phpbb_wlm',
+			'field_length'			=> '40',
+			'field_minlen'			=> '5',
+			'field_maxlen'			=> '255',
+			'field_novalue'			=> '',
+			'field_default_value'	=> '',
+			'field_validation'		=> '.*',
+			'field_required'		=> 0,
+			'field_show_novalue'	=> 0,
+			'field_show_on_reg'		=> 0,
+			'field_show_on_pm'		=> 1,
+			'field_show_on_vt'		=> 1,
+			'field_show_on_ml'		=> 0,
+			'field_show_profile'	=> 1,
+			'field_hide'			=> 0,
+			'field_no_view'			=> 0,
+			'field_active'			=> 1,
+			'field_is_contact'		=> 1,
+			'field_contact_desc'	=> '',
+			'field_contact_url'		=> '',
+			'field_order'			=> $max_field_order + 1,
+		);
+
+		$sql = 'INSERT INTO ' . PROFILE_FIELDS_TABLE . ' ' . $this->db->sql_build_array('INSERT', $sql_ary);
+		$this->db->sql_query($sql);
+		$field_id = (int) $this->db->sql_nextid();
+
+		$insert_buffer = new \phpbb\db\sql_insert_buffer($this->db, PROFILE_LANG_TABLE);
+
+		$sql = 'SELECT lang_id
+			FROM ' . LANG_TABLE;
+		$result = $this->db->sql_query($sql);
+		$lang_name = 'WLM';
+		while ($lang_id = (int) $this->db->sql_fetchfield('lang_id'))
+		{
+			$insert_buffer->insert(array(
+				'field_id'				=> (int) $field_id,
+				'lang_id'				=> (int) $lang_id,
+				'lang_name'				=> $lang_name,
+				'lang_explain'			=> '',
+				'lang_default_value'	=> '',
+			));
+		}
+		$this->db->sql_freeresult($result);
+
+		$insert_buffer->flush();
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v320/report_id_auto_increment.php b/phpBB/phpbb/db/migration/data/v320/report_id_auto_increment.php
new file mode 100644
index 0000000000..6e81baefb9
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v320/report_id_auto_increment.php
@@ -0,0 +1,46 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v320;
+
+class report_id_auto_increment extends \phpbb\db\migration\migration
+{
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v320\default_data_type_ids',
+		);
+	}
+
+	public function update_schema()
+	{
+		return array(
+			'change_columns'	=> array(
+				$this->table_prefix . 'reports'				=> array(
+					'report_id'		=> array('ULINT', null, 'auto_increment'),
+				),
+			),
+		);
+	}
+
+	public function revert_schema()
+	{
+		return array(
+			'change_columns'	=> array(
+				$this->table_prefix . 'reports'				=> array(
+					'report_id'		=> array('ULINT', 0),
+				),
+			),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v320/text_reparser.php b/phpBB/phpbb/db/migration/data/v320/text_reparser.php
new file mode 100644
index 0000000000..6b8cf93cc9
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v320/text_reparser.php
@@ -0,0 +1,121 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\db\migration\data\v320;
+
+use phpbb\textreparser\manager;
+use phpbb\textreparser\reparser_interface;
+
+class text_reparser extends \phpbb\db\migration\container_aware_migration
+{
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v310\contact_admin_form',
+			'\phpbb\db\migration\data\v320\allowed_schemes_links',
+		);
+	}
+
+	public function effectively_installed()
+	{
+		return isset($this->config['reparse_lock']);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.add', array('reparse_lock', 0, true)),
+			array('config.add', array('text_reparser.pm_text_cron_interval', 10)),
+			array('config.add', array('text_reparser.pm_text_last_cron', 0)),
+			array('config.add', array('text_reparser.poll_option_cron_interval', 10)),
+			array('config.add', array('text_reparser.poll_option_last_cron', 0)),
+			array('config.add', array('text_reparser.poll_title_cron_interval', 10)),
+			array('config.add', array('text_reparser.poll_title_last_cron', 0)),
+			array('config.add', array('text_reparser.post_text_cron_interval', 10)),
+			array('config.add', array('text_reparser.post_text_last_cron', 0)),
+			array('config.add', array('text_reparser.user_signature_cron_interval', 10)),
+			array('config.add', array('text_reparser.user_signature_last_cron', 0)),
+			array('custom', array(array($this, 'reparse'))),
+		);
+	}
+
+	public function reparse($resume_data)
+	{
+		/** @var manager $reparser_manager */
+		$reparser_manager = $this->container->get('text_reparser.manager');
+
+		if (!is_array($resume_data))
+		{
+			/** @var reparser_interface[] $reparsers */
+			$reparsers = $this->container->get('text_reparser_collection');
+
+			// Initialize all reparsers
+			foreach ($reparsers as $name => $reparser)
+			{
+				$reparser_manager->update_resume_data($name, 1, $reparser->get_max_id(), 100);
+			}
+		}
+
+		// Sometimes a cron job is too much
+		$limit = 100;
+		$fast_reparsers = array(
+			'text_reparser.contact_admin_info',
+			'text_reparser.forum_description',
+			'text_reparser.forum_rules',
+			'text_reparser.group_description',
+		);
+
+		if (!is_array($resume_data))
+		{
+			$resume_data = array(
+				'reparser'	=> 0,
+				'current'	=> $this->container->get($fast_reparsers[0])->get_max_id(),
+			);
+		}
+
+		$fast_reparsers_size = count($fast_reparsers);
+		$processed_records = 0;
+		while ($processed_records < $limit && $resume_data['reparser'] < $fast_reparsers_size)
+		{
+			$reparser = $this->container->get($fast_reparsers[$resume_data['reparser']]);
+
+			// New reparser
+			if ($resume_data['current'] === 0)
+			{
+				$resume_data['current'] = $reparser->get_max_id();
+			}
+
+			$start = max(1, $resume_data['current'] + 1 - ($limit - $processed_records));
+			$end = max(1, $resume_data['current']);
+			$reparser->reparse_range($start, $end);
+
+			$processed_records += $end - $start + 1;
+			$resume_data['current'] = $start - 1;
+
+			if ($start === 1)
+			{
+				// Prevent CLI command from running these reparsers again
+				$reparser_manager->update_resume_data($fast_reparsers[$resume_data['reparser']], 1, 0, $limit);
+
+				$resume_data['reparser']++;
+			}
+		}
+
+		if ($resume_data['reparser'] === $fast_reparsers_size)
+		{
+			return true;
+		}
+
+		return $resume_data;
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v320/v320.php b/phpBB/phpbb/db/migration/data/v320/v320.php
new file mode 100644
index 0000000000..20e741cb8b
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v320/v320.php
@@ -0,0 +1,40 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v320;
+
+use phpbb\db\migration\migration;
+
+class v320 extends migration
+{
+	public function effectively_installed()
+	{
+		return version_compare($this->config['version'], '3.2.0', '>=');
+	}
+
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v31x\increase_size_of_emotion',
+			'\phpbb\db\migration\data\v320\cookie_notice',
+		);
+
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.update', array('version', '3.2.0')),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v320/v320a1.php b/phpBB/phpbb/db/migration/data/v320/v320a1.php
new file mode 100644
index 0000000000..d7ecb36f90
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v320/v320a1.php
@@ -0,0 +1,44 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v320;
+
+class v320a1 extends \phpbb\db\migration\container_aware_migration
+{
+	public function effectively_installed()
+	{
+		return version_compare($this->config['version'], '3.2.0-a1', '>=');
+	}
+
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v320\dev',
+			'\phpbb\db\migration\data\v320\allowed_schemes_links',
+			'\phpbb\db\migration\data\v320\announce_global_permission',
+			'\phpbb\db\migration\data\v320\remove_profilefield_wlm',
+			'\phpbb\db\migration\data\v320\font_awesome_update',
+			'\phpbb\db\migration\data\v320\icons_alt',
+			'\phpbb\db\migration\data\v320\log_post_id',
+			'\phpbb\db\migration\data\v320\remove_outdated_media',
+			'\phpbb\db\migration\data\v320\notifications_board',
+		);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.update', array('version', '3.2.0-dev')),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v320/v320a2.php b/phpBB/phpbb/db/migration/data/v320/v320a2.php
new file mode 100644
index 0000000000..ae53a73210
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v320/v320a2.php
@@ -0,0 +1,38 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v320;
+
+class v320a2 extends \phpbb\db\migration\container_aware_migration
+{
+	public function effectively_installed()
+	{
+		return version_compare($this->config['version'], '3.2.0-a2', '>=');
+	}
+
+	static public function depends_on()
+	{
+		return 		array(
+			'\phpbb\db\migration\data\v31x\v317rc1',
+			'\phpbb\db\migration\data\v320\text_reparser',
+			'\phpbb\db\migration\data\v320\v320a1',
+		);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.update', array('version', '3.2.0-a2')),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v320/v320b1.php b/phpBB/phpbb/db/migration/data/v320/v320b1.php
new file mode 100644
index 0000000000..5c3a3797cd
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v320/v320b1.php
@@ -0,0 +1,39 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v320;
+
+class v320b1 extends \phpbb\db\migration\container_aware_migration
+{
+	public function effectively_installed()
+	{
+		return version_compare($this->config['version'], '3.2.0-b1', '>=');
+	}
+
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v31x\v317pl1',
+			'\phpbb\db\migration\data\v320\v320a2',
+			'\phpbb\db\migration\data\v31x\increase_size_of_dateformat',
+			'\phpbb\db\migration\data\v320\default_data_type_ids',
+		);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.update', array('version', '3.2.0-b1')),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v320/v320b2.php b/phpBB/phpbb/db/migration/data/v320/v320b2.php
new file mode 100644
index 0000000000..007f7588e6
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v320/v320b2.php
@@ -0,0 +1,40 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v320;
+
+use phpbb\db\migration\migration;
+
+class v320b2 extends migration
+{
+	public function effectively_installed()
+	{
+		return version_compare($this->config['version'], '3.2.0-b2', '>=');
+	}
+
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v31x\v318',
+			'\phpbb\db\migration\data\v320\v320b1',
+			'\phpbb\db\migration\data\v320\remote_upload_validation',
+		);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.update', array('version', '3.2.0-b2')),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v320/v320rc1.php b/phpBB/phpbb/db/migration/data/v320/v320rc1.php
new file mode 100644
index 0000000000..a04a2abb19
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v320/v320rc1.php
@@ -0,0 +1,40 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v320;
+
+use phpbb\db\migration\migration;
+
+class v320rc1 extends migration
+{
+	public function effectively_installed()
+	{
+		return version_compare($this->config['version'], '3.2.0-RC1', '>=');
+	}
+
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v31x\v319',
+			'\phpbb\db\migration\data\v320\report_id_auto_increment',
+			'\phpbb\db\migration\data\v320\v320b2',
+		);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.update', array('version', '3.2.0-RC1')),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v320/v320rc2.php b/phpBB/phpbb/db/migration/data/v320/v320rc2.php
new file mode 100644
index 0000000000..ec9bb62732
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v320/v320rc2.php
@@ -0,0 +1,40 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v320;
+
+use phpbb\db\migration\migration;
+
+class v320rc2 extends migration
+{
+	public function effectively_installed()
+	{
+		return version_compare($this->config['version'], '3.2.0-RC2', '>=');
+	}
+
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v31x\remove_duplicate_migrations',
+			'\phpbb\db\migration\data\v31x\add_log_time_index',
+			'\phpbb\db\migration\data\v320\add_help_phpbb',
+		);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.update', array('version', '3.2.0-RC2')),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v32x/.htaccess b/phpBB/phpbb/db/migration/data/v32x/.htaccess
new file mode 100644
index 0000000000..44242b5418
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v32x/.htaccess
@@ -0,0 +1,33 @@
+# With Apache 2.4 the "Order, Deny" syntax has been deprecated and moved from
+# module mod_authz_host to a new module called mod_access_compat (which may be
+# disabled) and a new "Require" syntax has been introduced to mod_authz_host.
+# We could just conditionally provide both versions, but unfortunately Apache
+# does not explicitly tell us its version if the module mod_version is not
+# available. In this case, we check for the availability of module
+# mod_authz_core (which should be on 2.4 or higher only) as a best guess.
+<IfModule mod_version.c>
+	<IfVersion < 2.4>
+		<Files "*">
+			Order Allow,Deny
+			Deny from All
+		</Files>
+	</IfVersion>
+	<IfVersion >= 2.4>
+		<Files "*">
+			Require all denied
+		</Files>
+	</IfVersion>
+</IfModule>
+<IfModule !mod_version.c>
+	<IfModule !mod_authz_core.c>
+		<Files "*">
+			Order Allow,Deny
+			Deny from All
+		</Files>
+	</IfModule>
+	<IfModule mod_authz_core.c>
+		<Files "*">
+			Require all denied
+		</Files>
+	</IfModule>
+</IfModule>
diff --git a/phpBB/phpbb/db/migration/data/v32x/cookie_notice_p2.php b/phpBB/phpbb/db/migration/data/v32x/cookie_notice_p2.php
new file mode 100644
index 0000000000..1a83175705
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v32x/cookie_notice_p2.php
@@ -0,0 +1,36 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v32x;
+
+class cookie_notice_p2 extends \phpbb\db\migration\migration
+{
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v320\v320',
+		);
+	}
+
+	public function effectively_installed()
+	{
+		return isset($this->config['cookie_notice']);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.add', array('cookie_notice', '0')),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v32x/disable_remote_avatar.php b/phpBB/phpbb/db/migration/data/v32x/disable_remote_avatar.php
new file mode 100644
index 0000000000..b08833fad4
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v32x/disable_remote_avatar.php
@@ -0,0 +1,34 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\db\migration\data\v32x;
+
+use phpbb\db\migration\migration;
+
+class disable_remote_avatar extends migration
+{
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v32x\v325',
+		);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.update', array('allow_avatar_remote', '0')),
+			array('config.update', array('allow_avatar_remote_upload', '0')),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v32x/email_force_sender.php b/phpBB/phpbb/db/migration/data/v32x/email_force_sender.php
new file mode 100644
index 0000000000..5319b7f76e
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v32x/email_force_sender.php
@@ -0,0 +1,37 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v32x;
+
+class email_force_sender extends \phpbb\db\migration\migration
+{
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v32x\v321',
+		);
+	}
+
+	public function effectively_installed()
+	{
+		return isset($this->config['email_force_sender']);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.add', array('email_force_sender', '0')),
+			array('config.remove', array('email_function_name')),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v32x/enable_accurate_pm_button.php b/phpBB/phpbb/db/migration/data/v32x/enable_accurate_pm_button.php
new file mode 100644
index 0000000000..a7b99606f7
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v32x/enable_accurate_pm_button.php
@@ -0,0 +1,36 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v32x;
+
+class enable_accurate_pm_button extends \phpbb\db\migration\migration
+{
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v32x\v322',
+		);
+	}
+
+	public function effectively_installed()
+	{
+		return isset($this->config['enable_accurate_pm_button']);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.add', array('enable_accurate_pm_button', '1')),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v32x/f_list_topics_permission_add.php b/phpBB/phpbb/db/migration/data/v32x/f_list_topics_permission_add.php
new file mode 100644
index 0000000000..49727e5a62
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v32x/f_list_topics_permission_add.php
@@ -0,0 +1,31 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\db\migration\data\v32x;
+
+class f_list_topics_permission_add extends \phpbb\db\migration\migration
+{
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v32x\v321',
+		);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('permission.add', array('f_list_topics', false, 'f_read')),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v32x/fix_user_styles.php b/phpBB/phpbb/db/migration/data/v32x/fix_user_styles.php
new file mode 100644
index 0000000000..16fbdbc77b
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v32x/fix_user_styles.php
@@ -0,0 +1,54 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v32x;
+
+class fix_user_styles extends \phpbb\db\migration\migration
+{
+
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v320\v320',
+		);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('custom', array(array($this, 'styles_fix'))),
+		);
+	}
+
+	public function styles_fix()
+	{
+		$default_style = (int) $this->config['default_style'];
+		$enabled_styles = array();
+
+		// Get enabled styles
+		$sql = 'SELECT style_id
+			FROM ' . STYLES_TABLE . '
+			WHERE style_active = 1';
+		$result = $this->db->sql_query($sql);
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			$enabled_styles[] = (int) $row['style_id'];
+		}
+		$this->db->sql_freeresult($result);
+
+		// Set the default style to users who have an invalid style
+		$this->sql_query('UPDATE ' . USERS_TABLE . '
+			SET user_style = ' . (int) $default_style . '
+			WHERE ' . $this->db->sql_in_set('user_style', $enabled_styles, true));
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v32x/forum_topics_per_page_type.php b/phpBB/phpbb/db/migration/data/v32x/forum_topics_per_page_type.php
new file mode 100644
index 0000000000..afcecf2ef0
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v32x/forum_topics_per_page_type.php
@@ -0,0 +1,37 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v32x;
+
+class forum_topics_per_page_type extends \phpbb\db\migration\migration
+{
+
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v32x\v323',
+		);
+	}
+
+	public function update_schema()
+	{
+		return array(
+			'change_columns' => array(
+				$this->table_prefix . 'forums' => array(
+					'forum_topics_per_page' => array('USINT', 0),
+				),
+			),
+		);
+	}
+
+}
diff --git a/phpBB/phpbb/db/migration/data/v32x/jquery_update.php b/phpBB/phpbb/db/migration/data/v32x/jquery_update.php
new file mode 100644
index 0000000000..6dc58ec638
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v32x/jquery_update.php
@@ -0,0 +1,37 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\db\migration\data\v32x;
+
+class jquery_update extends \phpbb\db\migration\migration
+{
+	public function effectively_installed()
+	{
+		return $this->config['load_jquery_url'] === '//ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js';
+	}
+
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v32x\v325rc1',
+		);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.update', array('load_jquery_url', '//ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js')),
+		);
+	}
+
+}
diff --git a/phpBB/phpbb/db/migration/data/v32x/load_user_activity_limit.php b/phpBB/phpbb/db/migration/data/v32x/load_user_activity_limit.php
new file mode 100644
index 0000000000..71bb6c00bf
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v32x/load_user_activity_limit.php
@@ -0,0 +1,36 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v32x;
+
+class load_user_activity_limit extends \phpbb\db\migration\migration
+{
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v320\v320',
+		);
+	}
+
+	public function effectively_installed()
+	{
+		return isset($this->config['load_user_activity_limit']);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.add', array('load_user_activity_limit', '5000')),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v32x/merge_duplicate_bbcodes.php b/phpBB/phpbb/db/migration/data/v32x/merge_duplicate_bbcodes.php
new file mode 100644
index 0000000000..71ee19e3dd
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v32x/merge_duplicate_bbcodes.php
@@ -0,0 +1,84 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v32x;
+
+class merge_duplicate_bbcodes extends \phpbb\db\migration\container_aware_migration
+{
+	public function update_data()
+	{
+		return [
+			['custom', [[$this, 'update_bbcodes_table']]],
+		];
+	}
+
+	public function update_bbcodes_table()
+	{
+		$sql     = 'SELECT bbcode_id, bbcode_tag, bbcode_helpline, bbcode_match, bbcode_tpl FROM ' . BBCODES_TABLE;
+		$result  = $this->sql_query($sql);
+		$bbcodes = [];
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			$variant = (substr($row['bbcode_tag'], -1) === '=') ? 'with': 'without';
+			$bbcode_name = strtolower(rtrim($row['bbcode_tag'], '='));
+			$bbcodes[$bbcode_name][$variant] = $row;
+		}
+		$this->db->sql_freeresult($result);
+
+		foreach ($bbcodes as $bbcode_name => $variants)
+		{
+			if (count($variants) === 2)
+			{
+				$this->merge_bbcodes($variants['without'], $variants['with']);
+			}
+		}
+	}
+
+	protected function merge_bbcodes(array $without, array $with)
+	{
+		try
+		{
+			$merged = $this->container->get('text_formatter.s9e.bbcode_merger')->merge_bbcodes(
+				[
+					'usage'    => $without['bbcode_match'],
+					'template' => $without['bbcode_tpl']
+				],
+				[
+					'usage'    => $with['bbcode_match'],
+					'template' => $with['bbcode_tpl']
+				]
+			);
+		}
+		catch (\Exception $e)
+		{
+			// Ignore the pair and move on. The BBCodes would have to be fixed manually
+			return;
+		}
+
+		$bbcode_data = [
+			'bbcode_tag'      => $without['bbcode_tag'],
+			'bbcode_helpline' => $without['bbcode_helpline'] . ' | ' . $with['bbcode_helpline'],
+			'bbcode_match'    => $merged['usage'],
+			'bbcode_tpl'      => $merged['template']
+		];
+
+		$sql = 'UPDATE ' . BBCODES_TABLE . '
+			SET ' . $this->db->sql_build_array('UPDATE', $bbcode_data) . '
+			WHERE bbcode_id = ' . (int) $without['bbcode_id'];
+		$this->sql_query($sql);
+
+		$sql = 'DELETE FROM ' . BBCODES_TABLE . '
+			WHERE bbcode_id = ' . (int) $with['bbcode_id'];
+		$this->sql_query($sql);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v32x/remove_imagick.php b/phpBB/phpbb/db/migration/data/v32x/remove_imagick.php
new file mode 100644
index 0000000000..7ad396f8e8
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v32x/remove_imagick.php
@@ -0,0 +1,31 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v32x;
+
+class remove_imagick extends \phpbb\db\migration\migration
+{
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v32x\v324rc1',
+		);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.remove', array('img_imagick')),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v32x/smtp_dynamic_data.php b/phpBB/phpbb/db/migration/data/v32x/smtp_dynamic_data.php
new file mode 100644
index 0000000000..aeaa3e8979
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v32x/smtp_dynamic_data.php
@@ -0,0 +1,42 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\db\migration\data\v32x;
+
+class smtp_dynamic_data extends \phpbb\db\migration\migration
+{
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v32x\v326rc1',
+		);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('custom', array(array($this, 'set_smtp_dynamic'))),
+		);
+	}
+
+	public function set_smtp_dynamic()
+	{
+		$smtp_auth_entries = [
+			'smtp_password',
+			'smtp_username',
+		];
+		$this->sql_query('UPDATE ' . CONFIG_TABLE . '
+			SET is_dynamic = 1
+			WHERE ' . $this->db->sql_in_set('config_name', $smtp_auth_entries));
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v32x/timezone_p3.php b/phpBB/phpbb/db/migration/data/v32x/timezone_p3.php
new file mode 100644
index 0000000000..433f62ace9
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v32x/timezone_p3.php
@@ -0,0 +1,29 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v32x;
+
+class timezone_p3 extends \phpbb\db\migration\migration
+{
+	static public function depends_on()
+	{
+		return array('\phpbb\db\migration\data\v310\timezone');
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.remove', array('board_dst')),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v32x/update_prosilver_bitfield.php b/phpBB/phpbb/db/migration/data/v32x/update_prosilver_bitfield.php
new file mode 100644
index 0000000000..6e51a01834
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v32x/update_prosilver_bitfield.php
@@ -0,0 +1,39 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v32x;
+
+class update_prosilver_bitfield extends \phpbb\db\migration\migration
+{
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v32x\v321',
+		);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('custom', array(array($this, 'update_bbcode_bitfield'))),
+		);
+	}
+
+	public function update_bbcode_bitfield()
+	{
+		$sql = 'UPDATE ' . STYLES_TABLE . "
+			SET bbcode_bitfield = '//g='
+			WHERE style_path = 'prosilver'";
+		$this->sql_query($sql);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v32x/user_emoji_permission.php b/phpBB/phpbb/db/migration/data/v32x/user_emoji_permission.php
new file mode 100644
index 0000000000..98759c78ee
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v32x/user_emoji_permission.php
@@ -0,0 +1,44 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v32x;
+
+class user_emoji_permission extends \phpbb\db\migration\migration
+{
+	public function effectively_installed()
+	{
+		$sql = 'SELECT auth_option_id
+			FROM ' . ACL_OPTIONS_TABLE . "
+			WHERE auth_option = 'u_emoji'";
+		$result = $this->db->sql_query($sql);
+		$auth_option_id = $this->db->sql_fetchfield('auth_option_id');
+		$this->db->sql_freeresult($result);
+
+		return $auth_option_id !== false;
+	}
+
+	static public function depends_on()
+	{
+		return [
+			'\phpbb\db\migration\data\v32x\v329rc1',
+		];
+	}
+
+	public function update_data()
+	{
+		return [
+			['permission.add', ['u_emoji']],
+			['permission.permission_set', ['REGISTERED', 'u_emoji', 'group']],
+		];
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v32x/user_notifications_table_index_p1.php b/phpBB/phpbb/db/migration/data/v32x/user_notifications_table_index_p1.php
new file mode 100644
index 0000000000..93ff31ec6c
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v32x/user_notifications_table_index_p1.php
@@ -0,0 +1,46 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\db\migration\data\v32x;
+
+class user_notifications_table_index_p1 extends \phpbb\db\migration\migration
+{
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v32x\cookie_notice_p2',
+		);
+	}
+
+	public function update_schema()
+	{
+		return array(
+			'add_index' => array(
+				$this->table_prefix . 'user_notifications' => array(
+					'user_id'							=> array('user_id'),
+				),
+			),
+		);
+	}
+
+	public function revert_schema()
+	{
+		return array(
+			'drop_keys' => array(
+				$this->table_prefix . 'user_notifications' => array(
+					'user_id',
+				),
+			),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v32x/user_notifications_table_index_p2.php b/phpBB/phpbb/db/migration/data/v32x/user_notifications_table_index_p2.php
new file mode 100644
index 0000000000..0a471766a0
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v32x/user_notifications_table_index_p2.php
@@ -0,0 +1,46 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\db\migration\data\v32x;
+
+class user_notifications_table_index_p2 extends \phpbb\db\migration\migration
+{
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v32x\user_notifications_table_index_p1',
+		);
+	}
+
+	public function update_schema()
+	{
+		return array(
+			'add_index' => array(
+				$this->table_prefix . 'user_notifications' => array(
+					'uid_itm_id'					=> array('user_id', 'item_id'),
+				),
+			),
+		);
+	}
+
+	public function revert_schema()
+	{
+		return array(
+			'drop_keys' => array(
+				$this->table_prefix . 'user_notifications' => array(
+					'uid_itm_id',
+				),
+			),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v32x/user_notifications_table_index_p3.php b/phpBB/phpbb/db/migration/data/v32x/user_notifications_table_index_p3.php
new file mode 100644
index 0000000000..1636b3024a
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v32x/user_notifications_table_index_p3.php
@@ -0,0 +1,46 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\db\migration\data\v32x;
+
+class user_notifications_table_index_p3 extends \phpbb\db\migration\migration
+{
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v32x\user_notifications_table_index_p2',
+		);
+	}
+
+	public function update_schema()
+	{
+		return array(
+			'add_index' => array(
+				$this->table_prefix . 'user_notifications' => array(
+					'usr_itm_tpe'					=> array('user_id', 'item_type', 'item_id'),
+				),
+			),
+		);
+	}
+
+	public function revert_schema()
+	{
+		return array(
+			'drop_keys' => array(
+				$this->table_prefix . 'user_notifications' => array(
+					'usr_itm_tpe',
+				),
+			),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v32x/user_notifications_table_reduce_column_sizes.php b/phpBB/phpbb/db/migration/data/v32x/user_notifications_table_reduce_column_sizes.php
new file mode 100644
index 0000000000..e0a107782e
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v32x/user_notifications_table_reduce_column_sizes.php
@@ -0,0 +1,48 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\db\migration\data\v32x;
+
+class user_notifications_table_reduce_column_sizes extends \phpbb\db\migration\migration
+{
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v32x\user_notifications_table_index_p3',
+		);
+	}
+
+	public function update_schema()
+	{
+		return array(
+			'change_columns'	=> array(
+				$this->table_prefix . 'user_notifications'			=> array(
+					'item_type'		=> array('VCHAR:165', ''),
+					'method'		=> array('VCHAR:165', ''),
+				),
+			),
+		);
+	}
+
+	public function revert_schema()
+	{
+		return array(
+			'change_columns'	=> array(
+				$this->table_prefix . 'user_notifications'			=> array(
+					'item_type'		=> array('VCHAR:255', ''),
+					'method'		=> array('VCHAR:255', ''),
+				),
+			),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v32x/user_notifications_table_remove_duplicates.php b/phpBB/phpbb/db/migration/data/v32x/user_notifications_table_remove_duplicates.php
new file mode 100644
index 0000000000..50d0642056
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v32x/user_notifications_table_remove_duplicates.php
@@ -0,0 +1,55 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\db\migration\data\v32x;
+
+class user_notifications_table_remove_duplicates extends \phpbb\db\migration\migration
+{
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v32x\user_notifications_table_temp_index',
+		);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('custom', array(array($this, 'remove_duplicates'))),
+		);
+	}
+
+	public function remove_duplicates()
+	{
+		$insert_buffer = new \phpbb\db\sql_insert_buffer($this->db, $this->table_prefix . 'user_notifications');
+
+		$sql = "SELECT item_type, item_id, user_id, method, MAX(notify) AS notify
+				FROM {$this->table_prefix}user_notifications
+				GROUP BY item_type, item_id, user_id, method
+				HAVING COUNT(item_type) > 1";
+
+		$result = $this->sql_query($sql);
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			// Delete the duplicate entries
+			$this->sql_query("DELETE FROM {$this->table_prefix}user_notifications
+								WHERE user_id = {$row['user_id']}
+								  AND item_type = '{$row['item_type']}'
+								  AND method = '{$row['method']}'");
+
+			// And re-insert as a single one
+			$insert_buffer->insert($row);
+		}
+		$this->db->sql_freeresult($result);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v32x/user_notifications_table_temp_index.php b/phpBB/phpbb/db/migration/data/v32x/user_notifications_table_temp_index.php
new file mode 100644
index 0000000000..80256a0e0a
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v32x/user_notifications_table_temp_index.php
@@ -0,0 +1,46 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\db\migration\data\v32x;
+
+class user_notifications_table_temp_index extends \phpbb\db\migration\migration
+{
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v32x\user_notifications_table_reduce_column_sizes',
+		);
+	}
+
+	public function update_schema()
+	{
+		return array(
+			'add_index' => array(
+				$this->table_prefix . 'user_notifications' => array(
+					'itm_usr_mthd'	=> array('item_type', 'item_id', 'user_id', 'method'),
+				),
+			),
+		);
+	}
+
+	public function revert_schema()
+	{
+		return array(
+			'drop_keys' => array(
+				$this->table_prefix . 'user_notifications' => array(
+					'itm_usr_mthd',
+				),
+			),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v32x/user_notifications_table_unique_index.php b/phpBB/phpbb/db/migration/data/v32x/user_notifications_table_unique_index.php
new file mode 100644
index 0000000000..51cf90c8a0
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v32x/user_notifications_table_unique_index.php
@@ -0,0 +1,51 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\db\migration\data\v32x;
+
+class user_notifications_table_unique_index extends \phpbb\db\migration\migration
+{
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v32x\user_notifications_table_remove_duplicates',
+		);
+	}
+
+	public function update_schema()
+	{
+		return array(
+			'drop_keys'			=> array(
+				$this->table_prefix . 'user_notifications' => array(
+					'itm_usr_mthd',
+				),
+			),
+			'add_unique_index'  => array(
+				$this->table_prefix . 'user_notifications' => array(
+					'itm_usr_mthd'	=> array('item_type', 'item_id', 'user_id', 'method'),
+				),
+			),
+		);
+	}
+
+	public function revert_schema()
+	{
+		return array(
+			'drop_keys' => array(
+				$this->table_prefix . 'user_notifications' => array(
+					'itm_usr_mthd',
+				),
+			),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v32x/v321.php b/phpBB/phpbb/db/migration/data/v32x/v321.php
new file mode 100644
index 0000000000..fdbb5cff19
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v32x/v321.php
@@ -0,0 +1,38 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v32x;
+
+class v321 extends \phpbb\db\migration\migration
+{
+	public function effectively_installed()
+	{
+		return phpbb_version_compare($this->config['version'], '3.2.1', '>=');
+	}
+
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v31x\v3111',
+			'\phpbb\db\migration\data\v32x\v321rc1',
+		);
+
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.update', array('version', '3.2.1')),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v32x/v321rc1.php b/phpBB/phpbb/db/migration/data/v32x/v321rc1.php
new file mode 100644
index 0000000000..653a16f327
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v32x/v321rc1.php
@@ -0,0 +1,39 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v32x;
+
+class v321rc1 extends \phpbb\db\migration\migration
+{
+	public function effectively_installed()
+	{
+		return phpbb_version_compare($this->config['version'], '3.2.1-RC1', '>=');
+	}
+
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v320\v320',
+			'\phpbb\db\migration\data\v31x\v3111rc1',
+			'\phpbb\db\migration\data\v32x\load_user_activity_limit',
+			'\phpbb\db\migration\data\v32x\user_notifications_table_unique_index',
+		);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.update', array('version', '3.2.1-RC1')),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v32x/v322.php b/phpBB/phpbb/db/migration/data/v32x/v322.php
new file mode 100644
index 0000000000..7ecbbb3e79
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v32x/v322.php
@@ -0,0 +1,37 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v32x;
+
+class v322 extends \phpbb\db\migration\migration
+{
+	public function effectively_installed()
+	{
+		return phpbb_version_compare($this->config['version'], '3.2.2', '>=');
+	}
+
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v31x\v3112',
+			'\phpbb\db\migration\data\v32x\v322rc1',
+		);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.update', array('version', '3.2.2')),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v32x/v322rc1.php b/phpBB/phpbb/db/migration/data/v32x/v322rc1.php
new file mode 100644
index 0000000000..4fd6270132
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v32x/v322rc1.php
@@ -0,0 +1,41 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v32x;
+
+class v322rc1 extends \phpbb\db\migration\migration
+{
+	public function effectively_installed()
+	{
+		return phpbb_version_compare($this->config['version'], '3.2.2-RC1', '>=');
+	}
+
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v32x\v321',
+			'\phpbb\db\migration\data\v32x\fix_user_styles',
+			'\phpbb\db\migration\data\v32x\update_prosilver_bitfield',
+			'\phpbb\db\migration\data\v32x\email_force_sender',
+			'\phpbb\db\migration\data\v32x\f_list_topics_permission_add',
+			'\phpbb\db\migration\data\v32x\merge_duplicate_bbcodes',
+		);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.update', array('version', '3.2.2-RC1')),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v32x/v323.php b/phpBB/phpbb/db/migration/data/v32x/v323.php
new file mode 100644
index 0000000000..1ec28ceb37
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v32x/v323.php
@@ -0,0 +1,37 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v32x;
+
+class v323 extends \phpbb\db\migration\migration
+{
+	public function effectively_installed()
+	{
+		return phpbb_version_compare($this->config['version'], '3.2.3', '>=');
+	}
+
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v32x\v323rc2',
+		);
+
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.update', array('version', '3.2.3')),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v32x/v323rc1.php b/phpBB/phpbb/db/migration/data/v32x/v323rc1.php
new file mode 100644
index 0000000000..c3fcd1ab0b
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v32x/v323rc1.php
@@ -0,0 +1,37 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v32x;
+
+class v323rc1 extends \phpbb\db\migration\migration
+{
+	public function effectively_installed()
+	{
+		return phpbb_version_compare($this->config['version'], '3.2.3-RC1', '>=');
+	}
+
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v32x\v322',
+			'\phpbb\db\migration\data\v32x\enable_accurate_pm_button',
+		);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.update', array('version', '3.2.3-RC1')),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v32x/v323rc2.php b/phpBB/phpbb/db/migration/data/v32x/v323rc2.php
new file mode 100644
index 0000000000..32235ee067
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v32x/v323rc2.php
@@ -0,0 +1,36 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v32x;
+
+class v323rc2 extends \phpbb\db\migration\migration
+{
+	public function effectively_installed()
+	{
+		return phpbb_version_compare($this->config['version'], '3.2.3-RC2', '>=');
+	}
+
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v32x\v323rc1',
+		);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.update', array('version', '3.2.3-RC2')),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v32x/v324.php b/phpBB/phpbb/db/migration/data/v32x/v324.php
new file mode 100644
index 0000000000..cd7783fdee
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v32x/v324.php
@@ -0,0 +1,38 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v32x;
+
+class v324 extends \phpbb\db\migration\migration
+{
+	public function effectively_installed()
+	{
+		return phpbb_version_compare($this->config['version'], '3.2.4', '>=');
+	}
+
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v32x\v324rc1',
+			'\phpbb\db\migration\data\v32x\remove_imagick',
+		);
+
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.update', array('version', '3.2.4')),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v32x/v324rc1.php b/phpBB/phpbb/db/migration/data/v32x/v324rc1.php
new file mode 100644
index 0000000000..0221e2621a
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v32x/v324rc1.php
@@ -0,0 +1,37 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v32x;
+
+class v324rc1 extends \phpbb\db\migration\migration
+{
+	public function effectively_installed()
+	{
+		return phpbb_version_compare($this->config['version'], '3.2.4-RC1', '>=');
+	}
+
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v32x\v323',
+			'\phpbb\db\migration\data\v32x\forum_topics_per_page_type',
+		);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.update', array('version', '3.2.4-RC1')),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v32x/v325.php b/phpBB/phpbb/db/migration/data/v32x/v325.php
new file mode 100644
index 0000000000..59de4916df
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v32x/v325.php
@@ -0,0 +1,38 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v32x;
+
+class v325 extends \phpbb\db\migration\migration
+{
+	public function effectively_installed()
+	{
+		return phpbb_version_compare($this->config['version'], '3.2.5', '>=');
+	}
+
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v32x\v325rc1',
+			'\phpbb\db\migration\data\v32x\jquery_update',
+		);
+
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.update', array('version', '3.2.5')),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v32x/v325rc1.php b/phpBB/phpbb/db/migration/data/v32x/v325rc1.php
new file mode 100644
index 0000000000..2d0de0a432
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v32x/v325rc1.php
@@ -0,0 +1,36 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v32x;
+
+class v325rc1 extends \phpbb\db\migration\migration
+{
+	public function effectively_installed()
+	{
+		return phpbb_version_compare($this->config['version'], '3.2.5-RC1', '>=');
+	}
+
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v32x\v324',
+		);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.update', array('version', '3.2.5-RC1')),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v32x/v326.php b/phpBB/phpbb/db/migration/data/v32x/v326.php
new file mode 100644
index 0000000000..2d511b9ed8
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v32x/v326.php
@@ -0,0 +1,39 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v32x;
+
+class v326 extends \phpbb\db\migration\migration
+{
+	public function effectively_installed()
+	{
+		return phpbb_version_compare($this->config['version'], '3.2.6', '>=');
+	}
+
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v32x\v326rc1',
+			'\phpbb\db\migration\data\v32x\disable_remote_avatar',
+			'\phpbb\db\migration\data\v32x\smtp_dynamic_data',
+		);
+
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.update', array('version', '3.2.6')),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v32x/v326rc1.php b/phpBB/phpbb/db/migration/data/v32x/v326rc1.php
new file mode 100644
index 0000000000..092700d3db
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v32x/v326rc1.php
@@ -0,0 +1,37 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v32x;
+
+class v326rc1 extends \phpbb\db\migration\migration
+{
+	public function effectively_installed()
+	{
+		return phpbb_version_compare($this->config['version'], '3.2.6-RC1', '>=');
+	}
+
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v32x\v325',
+		);
+
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.update', array('version', '3.2.6-RC1')),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v32x/v327.php b/phpBB/phpbb/db/migration/data/v32x/v327.php
new file mode 100644
index 0000000000..f9ea11f4b9
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v32x/v327.php
@@ -0,0 +1,37 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v32x;
+
+class v327 extends \phpbb\db\migration\migration
+{
+	public function effectively_installed()
+	{
+		return phpbb_version_compare($this->config['version'], '3.2.7', '>=');
+	}
+
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v32x\v327rc1',
+		);
+
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.update', array('version', '3.2.7')),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v32x/v327rc1.php b/phpBB/phpbb/db/migration/data/v32x/v327rc1.php
new file mode 100644
index 0000000000..c8169105af
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v32x/v327rc1.php
@@ -0,0 +1,36 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v32x;
+
+class v327rc1 extends \phpbb\db\migration\migration
+{
+	public function effectively_installed()
+	{
+		return phpbb_version_compare($this->config['version'], '3.2.7-RC1', '>=');
+	}
+
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v32x\v326',
+		);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.update', array('version', '3.2.7-RC1')),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v32x/v328.php b/phpBB/phpbb/db/migration/data/v32x/v328.php
new file mode 100644
index 0000000000..28ff2c7033
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v32x/v328.php
@@ -0,0 +1,36 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v32x;
+
+class v328 extends \phpbb\db\migration\migration
+{
+	public function effectively_installed()
+	{
+		return phpbb_version_compare($this->config['version'], '3.2.8', '>=');
+	}
+
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v32x\v328rc1',
+		);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.update', array('version', '3.2.8')),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v32x/v328rc1.php b/phpBB/phpbb/db/migration/data/v32x/v328rc1.php
new file mode 100644
index 0000000000..fa43cf33a7
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v32x/v328rc1.php
@@ -0,0 +1,37 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v32x;
+
+class v328rc1 extends \phpbb\db\migration\migration
+{
+	public function effectively_installed()
+	{
+		return phpbb_version_compare($this->config['version'], '3.2.8-RC1', '>=');
+	}
+
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v32x\timezone_p3',
+			'\phpbb\db\migration\data\v32x\v327',
+		);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.update', array('version', '3.2.8-RC1')),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v32x/v329.php b/phpBB/phpbb/db/migration/data/v32x/v329.php
new file mode 100644
index 0000000000..e88e264aef
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v32x/v329.php
@@ -0,0 +1,37 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v32x;
+
+class v329 extends \phpbb\db\migration\migration
+{
+	public function effectively_installed()
+	{
+		return phpbb_version_compare($this->config['version'], '3.2.9', '>=');
+	}
+
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v32x\v329rc1',
+			'\phpbb\db\migration\data\v32x\user_emoji_permission',
+		);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.update', array('version', '3.2.9')),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/data/v32x/v329rc1.php b/phpBB/phpbb/db/migration/data/v32x/v329rc1.php
new file mode 100644
index 0000000000..271bf62859
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v32x/v329rc1.php
@@ -0,0 +1,36 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v32x;
+
+class v329rc1 extends \phpbb\db\migration\migration
+{
+	public function effectively_installed()
+	{
+		return phpbb_version_compare($this->config['version'], '3.2.9-RC1', '>=');
+	}
+
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v32x\v328',
+		);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.update', array('version', '3.2.9-RC1')),
+		);
+	}
+}
diff --git a/phpBB/phpbb/db/migration/migration.php b/phpBB/phpbb/db/migration/migration.php
index 5f120333e1..4e218344f4 100644
--- a/phpBB/phpbb/db/migration/migration.php
+++ b/phpBB/phpbb/db/migration/migration.php
@@ -20,7 +20,7 @@ namespace phpbb\db\migration;
 * in a subclass. This class provides various utility methods to simplify editing
 * a phpBB.
 */
-abstract class migration
+abstract class migration implements migration_interface
 {
 	/** @var \phpbb\config\config */
 	protected $config;
@@ -28,7 +28,7 @@ abstract class migration
 	/** @var \phpbb\db\driver\driver_interface */
 	protected $db;
 
-	/** @var \phpbb\db\tools */
+	/** @var \phpbb\db\tools\tools_interface */
 	protected $db_tools;
 
 	/** @var string */
@@ -51,12 +51,12 @@ abstract class migration
 	*
 	* @param \phpbb\config\config $config
 	* @param \phpbb\db\driver\driver_interface $db
-	* @param \phpbb\db\tools $db_tools
+	* @param \phpbb\db\tools\tools_interface $db_tools
 	* @param string $phpbb_root_path
 	* @param string $php_ext
 	* @param string $table_prefix
 	*/
-	public function __construct(\phpbb\config\config $config, \phpbb\db\driver\driver_interface $db, \phpbb\db\tools $db_tools, $phpbb_root_path, $php_ext, $table_prefix)
+	public function __construct(\phpbb\config\config $config, \phpbb\db\driver\driver_interface $db, \phpbb\db\tools\tools_interface $db_tools, $phpbb_root_path, $php_ext, $table_prefix)
 	{
 		$this->config = $config;
 		$this->db = $db;
@@ -70,9 +70,7 @@ abstract class migration
 	}
 
 	/**
-	* Defines other migrations to be applied first
-	*
-	* @return array An array of migration class names
+	* {@inheritdoc}
 	*/
 	static public function depends_on()
 	{
@@ -80,14 +78,7 @@ abstract class migration
 	}
 
 	/**
-	* Allows you to check if the migration is effectively installed (entirely optional)
-	*
-	* This is checked when a migration is installed. If true is returned, the migration will be set as
-	* installed without performing the database changes.
-	* This function is intended to help moving to migrations from a previous database updater, where some
-	* migrations may have been installed already even though they are not yet listed in the migrations table.
-	*
-	* @return bool True if this migration is installed, False if this migration is not installed (checked on install)
+	* {@inheritdoc}
 	*/
 	public function effectively_installed()
 	{
@@ -95,9 +86,7 @@ abstract class migration
 	}
 
 	/**
-	* Updates the database schema by providing a set of change instructions
-	*
-	* @return array Array of schema changes (compatible with db_tools->perform_schema_changes())
+	* {@inheritdoc}
 	*/
 	public function update_schema()
 	{
@@ -105,9 +94,7 @@ abstract class migration
 	}
 
 	/**
-	* Reverts the database schema by providing a set of change instructions
-	*
-	* @return array Array of schema changes (compatible with db_tools->perform_schema_changes())
+	* {@inheritdoc}
 	*/
 	public function revert_schema()
 	{
@@ -115,9 +102,7 @@ abstract class migration
 	}
 
 	/**
-	* Updates data by returning a list of instructions to be executed
-	*
-	* @return array Array of data update instructions
+	* {@inheritdoc}
 	*/
 	public function update_data()
 	{
@@ -125,12 +110,7 @@ abstract class migration
 	}
 
 	/**
-	* Reverts data by returning a list of instructions to be executed
-	*
-	* @return array Array of data instructions that will be performed on revert
-	* 	NOTE: calls to tools (such as config.add) are automatically reverted when
-	* 		possible, so you should not attempt to revert those, this is mostly for
-	* 		otherwise unrevertable calls (custom functions for example)
+	* {@inheritdoc}
 	*/
 	public function revert_data()
 	{
diff --git a/phpBB/phpbb/db/migration/migration_interface.php b/phpBB/phpbb/db/migration/migration_interface.php
new file mode 100644
index 0000000000..2aba5ec608
--- /dev/null
+++ b/phpBB/phpbb/db/migration/migration_interface.php
@@ -0,0 +1,70 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\db\migration;
+
+/**
+ * Base class interface for database migrations
+ */
+interface migration_interface
+{
+	/**
+	 * Defines other migrations to be applied first
+	 *
+	 * @return array An array of migration class names
+	 */
+	static public function depends_on();
+
+	/**
+	 * Allows you to check if the migration is effectively installed (entirely optional)
+	 *
+	 * This is checked when a migration is installed. If true is returned, the migration will be set as
+	 * installed without performing the database changes.
+	 * This function is intended to help moving to migrations from a previous database updater, where some
+	 * migrations may have been installed already even though they are not yet listed in the migrations table.
+	 *
+	 * @return bool True if this migration is installed, False if this migration is not installed (checked on install)
+	 */
+	public function effectively_installed();
+
+	/**
+	 * Updates the database schema by providing a set of change instructions
+	 *
+	 * @return array Array of schema changes (compatible with db_tools->perform_schema_changes())
+	 */
+	public function update_schema();
+
+	/**
+	 * Reverts the database schema by providing a set of change instructions
+	 *
+	 * @return array Array of schema changes (compatible with db_tools->perform_schema_changes())
+	 */
+	public function revert_schema();
+
+	/**
+	 * Updates data by returning a list of instructions to be executed
+	 *
+	 * @return array Array of data update instructions
+	 */
+	public function update_data();
+
+	/**
+	 * Reverts data by returning a list of instructions to be executed
+	 *
+	 * @return array Array of data instructions that will be performed on revert
+	 * 	NOTE: calls to tools (such as config.add) are automatically reverted when
+	 * 		possible, so you should not attempt to revert those, this is mostly for
+	 * 		otherwise unrevertable calls (custom functions for example)
+	 */
+	public function revert_data();
+}
diff --git a/phpBB/phpbb/db/migration/profilefield_base_migration.php b/phpBB/phpbb/db/migration/profilefield_base_migration.php
index b20ca874be..bc542a8fed 100644
--- a/phpBB/phpbb/db/migration/profilefield_base_migration.php
+++ b/phpBB/phpbb/db/migration/profilefield_base_migration.php
@@ -238,6 +238,7 @@ abstract class profilefield_base_migration extends container_aware_migration
 
 		if ($profile_row === null)
 		{
+			/* @var $manager \phpbb\profilefields\manager */
 			$manager = $this->container->get('profilefields.manager');
 			$profile_row = $manager->build_insert_sql_array(array());
 		}
diff --git a/phpBB/phpbb/db/migration/schema_generator.php b/phpBB/phpbb/db/migration/schema_generator.php
index 91d8307d91..c579e25824 100644
--- a/phpBB/phpbb/db/migration/schema_generator.php
+++ b/phpBB/phpbb/db/migration/schema_generator.php
@@ -24,7 +24,7 @@ class schema_generator
 	/** @var \phpbb\db\driver\driver_interface */
 	protected $db;
 
-	/** @var \phpbb\db\tools */
+	/** @var \phpbb\db\tools\tools_interface */
 	protected $db_tools;
 
 	/** @var array */
@@ -48,7 +48,7 @@ class schema_generator
 	/**
 	* Constructor
 	*/
-	public function __construct(array $class_names, \phpbb\config\config $config, \phpbb\db\driver\driver_interface $db, \phpbb\db\tools $db_tools, $phpbb_root_path, $php_ext, $table_prefix)
+	public function __construct(array $class_names, \phpbb\config\config $config, \phpbb\db\driver\driver_interface $db, \phpbb\db\tools\tools_interface $db_tools, $phpbb_root_path, $php_ext, $table_prefix)
 	{
 		$this->config = $config;
 		$this->db = $db;
@@ -77,8 +77,15 @@ class schema_generator
 		$check_dependencies = true;
 		while (!empty($migrations))
 		{
-			foreach ($migrations as $migration_class)
+			foreach ($migrations as $key => $migration_class)
 			{
+				// Unset classes that are not a valid migration
+				if (\phpbb\db\migrator::is_migration($migration_class) === false)
+				{
+					unset($migrations[$key]);
+					continue;
+				}
+
 				$open_dependencies = array_diff($migration_class::depends_on(), $tree);
 
 				if (empty($open_dependencies))
diff --git a/phpBB/phpbb/db/migration/tool/config.php b/phpBB/phpbb/db/migration/tool/config.php
index 33aa8ff026..a351c4858e 100644
--- a/phpBB/phpbb/db/migration/tool/config.php
+++ b/phpBB/phpbb/db/migration/tool/config.php
@@ -134,7 +134,7 @@ class config implements \phpbb\db\migration\tool\tool_interface
 
 			case 'remove':
 				$call = 'add';
-				if (sizeof($arguments) == 1)
+				if (count($arguments) == 1)
 				{
 					$arguments[] = '';
 				}
diff --git a/phpBB/phpbb/db/migration/tool/config_text.php b/phpBB/phpbb/db/migration/tool/config_text.php
index 54b45f6f6d..5fe9a25b70 100644
--- a/phpBB/phpbb/db/migration/tool/config_text.php
+++ b/phpBB/phpbb/db/migration/tool/config_text.php
@@ -110,7 +110,7 @@ class config_text implements \phpbb\db\migration\tool\tool_interface
 
 			case 'remove':
 				$call = 'add';
-				if (sizeof($arguments) == 1)
+				if (count($arguments) == 1)
 				{
 					$arguments[] = '';
 				}
diff --git a/phpBB/phpbb/db/migration/tool/module.php b/phpBB/phpbb/db/migration/tool/module.php
index 7ea7d1dac1..e5133c8152 100644
--- a/phpBB/phpbb/db/migration/tool/module.php
+++ b/phpBB/phpbb/db/migration/tool/module.php
@@ -13,6 +13,8 @@
 
 namespace phpbb\db\migration\tool;
 
+use phpbb\module\exception\module_exception;
+
 /**
 * Migration module management tool
 */
@@ -27,6 +29,9 @@ class module implements \phpbb\db\migration\tool\tool_interface
 	/** @var \phpbb\user */
 	protected $user;
 
+	/** @var \phpbb\module\module_manager */
+	protected $module_manager;
+
 	/** @var string */
 	protected $phpbb_root_path;
 
@@ -45,15 +50,17 @@ class module implements \phpbb\db\migration\tool\tool_interface
 	* @param \phpbb\db\driver\driver_interface $db
 	* @param \phpbb\cache\service $cache
 	* @param \phpbb\user $user
+	* @param \phpbb\module\module_manager	$module_manager
 	* @param string $phpbb_root_path
 	* @param string $php_ext
 	* @param string $modules_table
 	*/
-	public function __construct(\phpbb\db\driver\driver_interface $db, \phpbb\cache\service $cache, \phpbb\user $user, $phpbb_root_path, $php_ext, $modules_table)
+	public function __construct(\phpbb\db\driver\driver_interface $db, \phpbb\cache\service $cache, \phpbb\user $user, \phpbb\module\module_manager $module_manager, $phpbb_root_path, $php_ext, $modules_table)
 	{
 		$this->db = $db;
 		$this->cache = $cache;
 		$this->user = $user;
+		$this->module_manager = $module_manager;
 		$this->phpbb_root_path = $phpbb_root_path;
 		$this->php_ext = $php_ext;
 		$this->modules_table = $modules_table;
@@ -77,9 +84,12 @@ class module implements \phpbb\db\migration\tool\tool_interface
 	*		Use false to ignore the parent check and check class wide.
 	* @param int|string $module The module_id|module_langname you would like to
 	* 		check for to see if it exists
-	* @return bool true/false if module exists
+	* @param bool $lazy Checks lazily if the module exists. Returns true if it exists in at
+	*       least one given parent.
+	* @return bool true if module exists in *all* given parents, false if not in any given parent;
+	 *      true if ignoring parent check and module exists class wide, false if not found at all.
 	*/
-	public function exists($class, $parent, $module)
+	public function exists($class, $parent, $module, $lazy = false)
 	{
 		// the main root directory should return true
 		if (!$module)
@@ -87,33 +97,48 @@ class module implements \phpbb\db\migration\tool\tool_interface
 			return true;
 		}
 
-		$parent_sql = '';
+		$parent_sqls = [];
 		if ($parent !== false)
 		{
-			$parent = $this->get_parent_module_id($parent, $module, false);
-			if ($parent === false)
+			$parents = $this->get_parent_module_id($parent, $module, false);
+			if ($parents === false)
 			{
 				return false;
 			}
 
-			$parent_sql = 'AND parent_id = ' . (int) $parent;
+			foreach ((array) $parents as $parent_id)
+			{
+				$parent_sqls[] = 'AND parent_id = ' . (int) $parent_id;
+			}
+		}
+		else
+		{
+			$parent_sqls[] = '';
 		}
 
-		$sql = 'SELECT module_id
-			FROM ' . $this->modules_table . "
-			WHERE module_class = '" . $this->db->sql_escape($class) . "'
-				$parent_sql
-				AND " . ((is_numeric($module)) ? 'module_id = ' . (int) $module : "module_langname = '" . $this->db->sql_escape($module) . "'");
-		$result = $this->db->sql_query($sql);
-		$module_id = $this->db->sql_fetchfield('module_id');
-		$this->db->sql_freeresult($result);
-
-		if ($module_id)
+		foreach ($parent_sqls as $parent_sql)
 		{
-			return true;
+			$sql = 'SELECT module_id
+				FROM ' . $this->modules_table . "
+				WHERE module_class = '" . $this->db->sql_escape($class) . "'
+					$parent_sql
+					AND " . ((is_numeric($module)) ? 'module_id = ' . (int) $module : "module_langname = '" . $this->db->sql_escape($module) . "'");
+			$result = $this->db->sql_query($sql);
+			$module_id = $this->db->sql_fetchfield('module_id');
+			$this->db->sql_freeresult($result);
+
+			if (!$lazy && !$module_id)
+			{
+				return false;
+			}
+			if ($lazy && $module_id)
+			{
+				return true;
+			}
 		}
 
-		return false;
+		// Returns true, if modules exist in all parents and false otherwise
+		return !$lazy;
 	}
 
 	/**
@@ -157,13 +182,15 @@ class module implements \phpbb\db\migration\tool\tool_interface
 	*/
 	public function add($class, $parent = 0, $data = array())
 	{
+		global $user, $phpbb_log;
+
 		// allow sending the name as a string in $data to create a category
 		if (!is_array($data))
 		{
 			$data = array('module_langname' => $data);
 		}
 
-		$parent = $data['parent_id'] = $this->get_parent_module_id($parent, $data);
+		$parents = (array) $this->get_parent_module_id($parent, $data);
 
 		if (!isset($data['module_langname']))
 		{
@@ -171,7 +198,6 @@ class module implements \phpbb\db\migration\tool\tool_interface
 			$basename = (isset($data['module_basename'])) ? $data['module_basename'] : '';
 			$module = $this->get_module_info($class, $basename);
 
-			$result = '';
 			foreach ($module['modes'] as $mode => $module_info)
 			{
 				if (!isset($data['modes']) || in_array($mode, $data['modes']))
@@ -187,106 +213,135 @@ class module implements \phpbb\db\migration\tool\tool_interface
 					);
 
 					// Run the "manual" way with the data we've collected.
-					$this->add($class, $parent, $new_module);
+					foreach ($parents as $parent)
+					{
+						$this->add($class, $parent, $new_module);
+					}
 				}
 			}
 
 			return;
 		}
 
-		// The "manual" way
-		if (!$this->exists($class, false, $parent))
+		foreach ($parents as $parent)
 		{
-			throw new \phpbb\db\migration\exception('MODULE_NOT_EXIST', $parent);
-		}
+			$data['parent_id'] = $parent;
 
-		if ($this->exists($class, $parent, $data['module_langname']))
-		{
-			throw new \phpbb\db\migration\exception('MODULE_EXISTS', $data['module_langname']);
-		}
+			// The "manual" way
+			if (!$this->exists($class, false, $parent))
+			{
+				throw new \phpbb\db\migration\exception('MODULE_NOT_EXIST', $parent);
+			}
 
-		if (!class_exists('acp_modules'))
-		{
-			include($this->phpbb_root_path . 'includes/acp/acp_modules.' . $this->php_ext);
-			$this->user->add_lang('acp/modules');
-		}
-		$acp_modules = new \acp_modules();
-
-		$module_data = array(
-			'module_enabled'	=> (isset($data['module_enabled'])) ? $data['module_enabled'] : 1,
-			'module_display'	=> (isset($data['module_display'])) ? $data['module_display'] : 1,
-			'module_basename'	=> (isset($data['module_basename'])) ? $data['module_basename'] : '',
-			'module_class'		=> $class,
-			'parent_id'			=> (int) $parent,
-			'module_langname'	=> (isset($data['module_langname'])) ? $data['module_langname'] : '',
-			'module_mode'		=> (isset($data['module_mode'])) ? $data['module_mode'] : '',
-			'module_auth'		=> (isset($data['module_auth'])) ? $data['module_auth'] : '',
-		);
-		$result = $acp_modules->update_module_data($module_data, true);
-
-		// update_module_data can either return a string or an empty array...
-		if (is_string($result))
-		{
-			// Error
-			throw new \phpbb\db\migration\exception('MODULE_ERROR', $result);
-		}
-		else
-		{
-			// Success
-			$module_log_name = ((isset($this->user->lang[$data['module_langname']])) ? $this->user->lang[$data['module_langname']] : $data['module_langname']);
-			add_log('admin', 'LOG_MODULE_ADD', $module_log_name);
+			if ($this->exists($class, $parent, $data['module_langname']))
+			{
+				throw new \phpbb\db\migration\exception('MODULE_EXISTS', $data['module_langname']);
+			}
 
-			// Move the module if requested above/below an existing one
-			if (isset($data['before']) && $data['before'])
+			$module_data = array(
+				'module_enabled'	=> (isset($data['module_enabled'])) ? $data['module_enabled'] : 1,
+				'module_display'	=> (isset($data['module_display'])) ? $data['module_display'] : 1,
+				'module_basename'	=> (isset($data['module_basename'])) ? $data['module_basename'] : '',
+				'module_class'		=> $class,
+				'parent_id'			=> (int) $parent,
+				'module_langname'	=> (isset($data['module_langname'])) ? $data['module_langname'] : '',
+				'module_mode'		=> (isset($data['module_mode'])) ? $data['module_mode'] : '',
+				'module_auth'		=> (isset($data['module_auth'])) ? $data['module_auth'] : '',
+			);
+
+			try
 			{
-				$sql = 'SELECT left_id
+				$this->module_manager->update_module_data($module_data);
+
+				// Success
+				$module_log_name = ((isset($this->user->lang[$data['module_langname']])) ? $this->user->lang[$data['module_langname']] : $data['module_langname']);
+				$phpbb_log->add('admin', (isset($user->data['user_id'])) ? $user->data['user_id'] : ANONYMOUS, $user->ip, 'LOG_MODULE_ADD', false, array($module_log_name));
+
+				// Move the module if requested above/below an existing one
+				if (isset($data['before']) && $data['before'])
+				{
+					$before_mode = $before_langname = '';
+					if (is_array($data['before']))
+					{
+						// Restore legacy-legacy behaviour from phpBB 3.0
+						list($before_mode, $before_langname) = $data['before'];
+					}
+					else
+					{
+						// Legacy behaviour from phpBB 3.1+
+						$before_langname = $data['before'];
+					}
+
+					$sql = 'SELECT left_id
 					FROM ' . $this->modules_table . "
 					WHERE module_class = '" . $this->db->sql_escape($class) . "'
 						AND parent_id = " . (int) $parent . "
-						AND module_langname = '" . $this->db->sql_escape($data['before']) . "'";
-				$this->db->sql_query($sql);
-				$to_left = (int) $this->db->sql_fetchfield('left_id');
+						AND module_langname = '" . $this->db->sql_escape($before_langname) . "'"
+						. (($before_mode) ? " AND module_mode = '" . $this->db->sql_escape($before_mode) . "'" : '');
+					$result = $this->db->sql_query($sql);
+					$to_left = (int) $this->db->sql_fetchfield('left_id');
+					$this->db->sql_freeresult($result);
 
-				$sql = 'UPDATE ' . $this->modules_table . "
+					$sql = 'UPDATE ' . $this->modules_table . "
 					SET left_id = left_id + 2, right_id = right_id + 2
 					WHERE module_class = '" . $this->db->sql_escape($class) . "'
 						AND left_id >= $to_left
 						AND left_id < {$module_data['left_id']}";
-				$this->db->sql_query($sql);
+					$this->db->sql_query($sql);
 
-				$sql = 'UPDATE ' . $this->modules_table . "
+					$sql = 'UPDATE ' . $this->modules_table . "
 					SET left_id = $to_left, right_id = " . ($to_left + 1) . "
 					WHERE module_class = '" . $this->db->sql_escape($class) . "'
 						AND module_id = {$module_data['module_id']}";
-				$this->db->sql_query($sql);
-			}
-			else if (isset($data['after']) && $data['after'])
-			{
-				$sql = 'SELECT right_id
+					$this->db->sql_query($sql);
+				}
+				else if (isset($data['after']) && $data['after'])
+				{
+					$after_mode = $after_langname = '';
+					if (is_array($data['after']))
+					{
+						// Restore legacy-legacy behaviour from phpBB 3.0
+						list($after_mode, $after_langname) = $data['after'];
+					}
+					else
+					{
+						// Legacy behaviour from phpBB 3.1+
+						$after_langname = $data['after'];
+					}
+
+					$sql = 'SELECT right_id
 					FROM ' . $this->modules_table . "
 					WHERE module_class = '" . $this->db->sql_escape($class) . "'
 						AND parent_id = " . (int) $parent . "
-						AND module_langname = '" . $this->db->sql_escape($data['after']) . "'";
-				$this->db->sql_query($sql);
-				$to_right = (int) $this->db->sql_fetchfield('right_id');
+						AND module_langname = '" . $this->db->sql_escape($after_langname) . "'"
+						. (($after_mode) ? " AND module_mode = '" . $this->db->sql_escape($after_mode) . "'" : '');
+					$result = $this->db->sql_query($sql);
+					$to_right = (int) $this->db->sql_fetchfield('right_id');
+					$this->db->sql_freeresult($result);
 
-				$sql = 'UPDATE ' . $this->modules_table . "
+					$sql = 'UPDATE ' . $this->modules_table . "
 					SET left_id = left_id + 2, right_id = right_id + 2
 					WHERE module_class = '" . $this->db->sql_escape($class) . "'
 						AND left_id >= $to_right
 						AND left_id < {$module_data['left_id']}";
-				$this->db->sql_query($sql);
+					$this->db->sql_query($sql);
 
-				$sql = 'UPDATE ' . $this->modules_table . '
+					$sql = 'UPDATE ' . $this->modules_table . '
 					SET left_id = ' . ($to_right + 1) . ', right_id = ' . ($to_right + 2) . "
 					WHERE module_class = '" . $this->db->sql_escape($class) . "'
 						AND module_id = {$module_data['module_id']}";
-				$this->db->sql_query($sql);
+					$this->db->sql_query($sql);
+				}
+			}
+			catch (module_exception $e)
+			{
+				// Error
+				throw new \phpbb\db\migration\exception('MODULE_ERROR', $e->getMessage());
 			}
 		}
 
 		// Clear the Modules Cache
-		$this->cache->destroy("_modules_$class");
+		$this->module_manager->remove_cache_file($class);
 	}
 
 	/**
@@ -333,7 +388,7 @@ class module implements \phpbb\db\migration\tool\tool_interface
 		}
 		else
 		{
-			if (!$this->exists($class, $parent, $module))
+			if (!$this->exists($class, $parent, $module, true))
 			{
 				return;
 			}
@@ -341,8 +396,8 @@ class module implements \phpbb\db\migration\tool\tool_interface
 			$parent_sql = '';
 			if ($parent !== false)
 			{
-				$parent = $this->get_parent_module_id($parent, $module);
-				$parent_sql = 'AND parent_id = ' . (int) $parent;
+				$parents = (array) $this->get_parent_module_id($parent, $module);
+				$parent_sql = 'AND ' . $this->db->sql_in_set('parent_id', $parents);
 			}
 
 			$module_ids = array();
@@ -365,24 +420,12 @@ class module implements \phpbb\db\migration\tool\tool_interface
 				$module_ids[] = (int) $module;
 			}
 
-			if (!class_exists('acp_modules'))
-			{
-				include($this->phpbb_root_path . 'includes/acp/acp_modules.' . $this->php_ext);
-				$this->user->add_lang('acp/modules');
-			}
-			$acp_modules = new \acp_modules();
-			$acp_modules->module_class = $class;
-
 			foreach ($module_ids as $module_id)
 			{
-				$result = $acp_modules->delete_module($module_id);
-				if (!empty($result))
-				{
-					return;
-				}
+				$this->module_manager->delete_module($module_id, $class);
 			}
 
-			$this->cache->destroy("_modules_$class");
+			$this->module_manager->remove_cache_file($class);
 		}
 	}
 
@@ -427,13 +470,7 @@ class module implements \phpbb\db\migration\tool\tool_interface
 	*/
 	protected function get_module_info($class, $basename)
 	{
-		if (!class_exists('acp_modules'))
-		{
-			include($this->phpbb_root_path . 'includes/acp/acp_modules.' . $this->php_ext);
-			$this->user->add_lang('acp/modules');
-		}
-		$acp_modules = new \acp_modules();
-		$module = $acp_modules->get_module_infos($basename, $class, true);
+		$module = $this->module_manager->get_module_infos($class, $basename, true);
 
 		if (empty($module))
 		{
@@ -474,23 +511,14 @@ class module implements \phpbb\db\migration\tool\tool_interface
 	* @param string|int $parent_id The parent module_id|module_langname
 	* @param int|string|array $data The module_id, module_langname for existance checking or module data array for adding
 	* @param bool $throw_exception The flag indicating if exception should be thrown on error
-	* @return mixed The int parent module_id or false
+	* @return mixed The int parent module_id, an array of int parent module_id values or false
 	* @throws \phpbb\db\migration\exception
 	*/
 	public function get_parent_module_id($parent_id, $data = '', $throw_exception = true)
 	{
-		// Initialize exception object placeholder
-		$exception = false;
-
 		// Allow '' to be sent as 0
 		$parent_id = $parent_id ?: 0;
 
-		// If automatic adding is in action, convert array back to string to simplify things
-		if (is_array($data) && sizeof($data) == 1)
-		{
-			$data = $data['module_langname'];
-		}
-
 		if (!is_numeric($parent_id))
 		{
 			// Refresh the $module_categories array
@@ -499,65 +527,30 @@ class module implements \phpbb\db\migration\tool\tool_interface
 			// Search for the parent module_langname
 			$ids = array_keys($this->module_categories, $parent_id);
 
-			switch (sizeof($ids))
+			switch (count($ids))
 			{
 				// No parent with the given module_langname exist
 				case 0:
-					$exception = new \phpbb\db\migration\exception('MODULE_NOT_EXIST', $parent_id);
+					if ($throw_exception)
+					{
+						throw new \phpbb\db\migration\exception('MODULE_NOT_EXIST', $parent_id);
+					}
+
+					return false;
 				break;
 
 				// Return the module id
 				case 1:
-					$parent_id = (int) $ids[0];
+					return (int) $ids[0];
 				break;
 
-				// Several modules with the given module_langname were found
-				// Try to determine the parent_id by the neighbour module parent
 				default:
-					if (is_array($data) && (isset($data['before']) || isset($data['after'])))
-					{
-						$neighbour_module_langname = isset($data['before']) ? $data['before'] : $data['after'];
-						$sql = 'SELECT parent_id
-							FROM ' . $this->modules_table . "
-							WHERE module_langname = '" . $this->db->sql_escape($neighbour_module_langname) . "'
-								AND " . $this->db->sql_in_set('parent_id', $ids);
-						$result = $this->db->sql_query($sql);
-						$parent_id = (int) $this->db->sql_fetchfield('parent_id');
-						if (!$parent_id)
-						{
-							$exception = new \phpbb\db\migration\exception('PARENT_MODULE_FIND_ERROR', $data['parent_id']);
-						}
-					}
-					else if (!empty($data) && !is_array($data))
-					{
-						// The module_langname is set, checking for the module existance
-						// As more than 1 parents were found already, there's no way for null parent_id here
-						$sql = 'SELECT m2.module_id as module_parent_id
-							FROM ' . $this->modules_table . ' m1, ' . $this->modules_table . " m2
-							WHERE " . ((is_numeric($data)) ? 'm1.module_id = ' . (int) $data : "m1.module_langname = '" . $this->db->sql_escape($data)) . "'
-								AND m2.module_id = m1.parent_id
-								AND " . $this->db->sql_in_set('m2.module_id', $ids);
-						$result = $this->db->sql_query($sql);
-						$parent_id = (int) $this->db->sql_fetchfield('module_parent_id');
-					}
-					else
-					{
-						//Unable to get the parent module id, throwing an exception
-						$exception = new \phpbb\db\migration\exception('MODULE_EXIST_MULTIPLE', $parent_id);
-					}
+					// This represents the old behaviour of phpBB 3.0
+					return $ids;
 				break;
 			}
 		}
 
-		if ($exception !== false)
-		{
-			if ($throw_exception)
-			{
-				throw $exception;
-			}
-			return false;
-		}
-
 		return $parent_id;
 	}
 }
diff --git a/phpBB/phpbb/db/migration/tool/permission.php b/phpBB/phpbb/db/migration/tool/permission.php
index 9688420025..4b53aa32a7 100644
--- a/phpBB/phpbb/db/migration/tool/permission.php
+++ b/phpBB/phpbb/db/migration/tool/permission.php
@@ -442,7 +442,7 @@ class permission implements \phpbb\db\migration\tool\tool_interface
 						}
 					);
 
-					if (sizeof($auth_option))
+					if (count($auth_option))
 					{
 						return $this->permission_set($role_name, $auth_option, 'role', $has_permission);
 					}
diff --git a/phpBB/phpbb/db/migrator.php b/phpBB/phpbb/db/migrator.php
index 45a333ac94..2b0c66fc58 100644
--- a/phpBB/phpbb/db/migrator.php
+++ b/phpBB/phpbb/db/migrator.php
@@ -13,6 +13,8 @@
 
 namespace phpbb\db;
 
+use phpbb\db\output_handler\migrator_output_handler_interface;
+use phpbb\db\output_handler\null_migrator_output_handler;
 use Symfony\Component\DependencyInjection\ContainerAwareInterface;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 
@@ -32,7 +34,7 @@ class migrator
 	/** @var \phpbb\db\driver\driver_interface */
 	protected $db;
 
-	/** @var \phpbb\db\tools */
+	/** @var \phpbb\db\tools\tools_interface */
 	protected $db_tools;
 
 	/** @var \phpbb\db\migration\helper */
@@ -92,7 +94,7 @@ class migrator
 	/**
 	* Constructor of the database migrator
 	*/
-	public function __construct(ContainerInterface $container, \phpbb\config\config $config, \phpbb\db\driver\driver_interface $db, \phpbb\db\tools $db_tools, $migrations_table, $phpbb_root_path, $php_ext, $table_prefix, $tools, \phpbb\db\migration\helper $helper)
+	public function __construct(ContainerInterface $container, \phpbb\config\config $config, \phpbb\db\driver\driver_interface $db, \phpbb\db\tools\tools_interface $db_tools, $migrations_table, $phpbb_root_path, $php_ext, $table_prefix, $tools, \phpbb\db\migration\helper $helper)
 	{
 		$this->container = $container;
 		$this->config = $config;
@@ -122,7 +124,7 @@ class migrator
 	/**
 	 * Set the output handler.
 	 *
-	 * @param migrator_output_handler $handler The output handler
+	 * @param migrator_output_handler_interface $handler The output handler
 	 */
 	public function set_output_handler(migrator_output_handler_interface $handler)
 	{
@@ -182,10 +184,50 @@ class migrator
 	*/
 	public function set_migrations($class_names)
 	{
+		foreach ($class_names as $key => $class)
+		{
+			if (!self::is_migration($class))
+			{
+				unset($class_names[$key]);
+			}
+		}
+
 		$this->migrations = $class_names;
 	}
 
 	/**
+	 * Get the list of available migration class names
+	 *
+	 * @return array Array of all migrations available to be run
+	 */
+	public function get_migrations()
+	{
+		return $this->migrations;
+	}
+
+	/**
+	 * Get the list of available and not installed migration class names
+	 *
+	 * @return array
+	 */
+	public function get_installable_migrations()
+	{
+		$unfinished_migrations = array();
+
+		foreach ($this->migrations as $name)
+		{
+			if (!isset($this->migration_state[$name]) ||
+				!$this->migration_state[$name]['migration_schema_done'] ||
+				!$this->migration_state[$name]['migration_data_done'])
+			{
+				$unfinished_migrations[] = $name;
+			}
+		}
+
+		return $unfinished_migrations;
+	}
+
+	/**
 	* Runs a single update step from the next migration to be applied.
 	*
 	* The update step can either be a schema or a (partial) data update. To
@@ -461,11 +503,14 @@ class migrator
 			return;
 		}
 
-		foreach ($this->migration_state as $name => $state)
+		foreach ($this->migrations as $name)
 		{
-			if (!empty($state['migration_depends_on']) && in_array($migration, $state['migration_depends_on']))
+			$state = $this->migration_state($name);
+
+			if ($state && in_array($migration, $state['migration_depends_on']) && ($state['migration_schema_done'] || $state['migration_data_done']))
 			{
 				$this->revert_do($name);
+				return;
 			}
 		}
 
@@ -497,19 +542,60 @@ class migrator
 
 		if ($state['migration_data_done'])
 		{
+			$verbosity = empty($state['migration_data_state']) ?
+				migrator_output_handler_interface::VERBOSITY_VERBOSE : migrator_output_handler_interface::VERBOSITY_DEBUG;
+			$this->output_handler->write(array('MIGRATION_REVERT_DATA_RUNNING', $name), $verbosity);
+
+			$total_time = (is_array($state['migration_data_state']) && isset($state['migration_data_state']['_total_time'])) ?
+				$state['migration_data_state']['_total_time'] : 0.0;
+			$elapsed_time = microtime(true);
+
 			$steps = array_merge($this->helper->reverse_update_data($migration->update_data()), $migration->revert_data());
 			$result = $this->process_data_step($steps, $state['migration_data_state']);
 
+			$elapsed_time = microtime(true) - $elapsed_time;
+			$total_time += $elapsed_time;
+
+			if (is_array($result))
+			{
+				$result['_total_time'] = $total_time;
+			}
+
 			$state['migration_data_state'] = ($result === true) ? '' : $result;
 			$state['migration_data_done'] = ($result === true) ? false : true;
 
 			$this->set_migration_state($name, $state);
+
+			if (!$state['migration_data_done'])
+			{
+				$this->output_handler->write(array('MIGRATION_REVERT_DATA_DONE', $name, $total_time), migrator_output_handler_interface::VERBOSITY_NORMAL);
+			}
+			else
+			{
+				$this->output_handler->write(array('MIGRATION_REVERT_DATA_IN_PROGRESS', $name, $elapsed_time), migrator_output_handler_interface::VERBOSITY_VERY_VERBOSE);
+			}
 		}
 		else if ($state['migration_schema_done'])
 		{
+			$verbosity = empty($state['migration_data_state']) ?
+				migrator_output_handler_interface::VERBOSITY_VERBOSE : migrator_output_handler_interface::VERBOSITY_DEBUG;
+			$this->output_handler->write(array('MIGRATION_REVERT_SCHEMA_RUNNING', $name), $verbosity);
+
+			$total_time = (is_array($state['migration_data_state']) && isset($state['migration_data_state']['_total_time'])) ?
+				$state['migration_data_state']['_total_time'] : 0.0;
+			$elapsed_time = microtime(true);
+
 			$steps = $this->helper->get_schema_steps($migration->revert_schema());
 			$result = $this->process_data_step($steps, $state['migration_data_state']);
 
+			$elapsed_time = microtime(true) - $elapsed_time;
+			$total_time += $elapsed_time;
+
+			if (is_array($result))
+			{
+				$result['_total_time'] = $total_time;
+			}
+
 			$state['migration_data_state'] = ($result === true) ? '' : $result;
 			$state['migration_schema_done'] = ($result === true) ? false : true;
 
@@ -521,10 +607,14 @@ class migrator
 
 				$this->last_run_migration = false;
 				unset($this->migration_state[$name]);
+
+				$this->output_handler->write(array('MIGRATION_REVERT_SCHEMA_DONE', $name, $total_time), migrator_output_handler_interface::VERBOSITY_NORMAL);
 			}
 			else
 			{
 				$this->set_migration_state($name, $state);
+
+				$this->output_handler->write(array('MIGRATION_REVERT_SCHEMA_IN_PROGRESS', $name, $elapsed_time), migrator_output_handler_interface::VERBOSITY_VERY_VERBOSE);
 			}
 		}
 
@@ -542,7 +632,7 @@ class migrator
 	*/
 	protected function process_data_step($steps, $state, $revert = false)
 	{
-		if (sizeof($steps) === 0)
+		if (count($steps) === 0)
 		{
 			return true;
 		}
@@ -569,7 +659,7 @@ class migrator
 			// Result will be null or true if everything completed correctly
 			// Stop after each update step, to let the updater control the script runtime
 			$result = $this->run_step($steps[$step], $last_result, $revert);
-			if (($result !== null && $result !== true) || $step + 1 < sizeof($steps))
+			if (($result !== null && $result !== true) || $step + 1 < count($steps))
 			{
 				return array(
 					'result'	=> $result,
@@ -670,7 +760,7 @@ class migrator
 
 				$condition = $parameters[0];
 
-				if (!$condition)
+				if (!$condition || (is_array($condition) && !$this->run_step($condition, $last_result, $reverse)))
 				{
 					return false;
 				}
@@ -921,4 +1011,27 @@ class migrator
 			));
 		}
 	}
+
+	/**
+	 * Check if a class is a migration.
+	 *
+	 * @param string $migration A migration class name
+	 * @return bool Return true if class is a migration, false otherwise
+	 */
+	static public function is_migration($migration)
+	{
+		if (class_exists($migration))
+		{
+			// Migration classes should extend the abstract class
+			// phpbb\db\migration\migration (which implements the
+			// migration_interface) and be instantiable.
+			$reflector = new \ReflectionClass($migration);
+			if ($reflector->implementsInterface('\phpbb\db\migration\migration_interface') && $reflector->isInstantiable())
+			{
+				return true;
+			}
+		}
+
+		return false;
+	}
 }
diff --git a/phpBB/phpbb/db/html_migrator_output_handler.php b/phpBB/phpbb/db/output_handler/html_migrator_output_handler.php
index e37c667463..67309649c9 100644
--- a/phpBB/phpbb/db/html_migrator_output_handler.php
+++ b/phpBB/phpbb/db/output_handler/html_migrator_output_handler.php
@@ -11,27 +11,25 @@
 *
 */
 
-namespace phpbb\db;
-
-use phpbb\user;
+namespace phpbb\db\output_handler;
 
 class html_migrator_output_handler implements migrator_output_handler_interface
 {
 	/**
-	 * User object.
+	 * Language object.
 	 *
-	 * @var user
+	 * @var \phpbb\language\language
 	 */
-	private $user;
+	private $language;
 
 	/**
 	 * Constructor
 	 *
-	 * @param user $user	User object
+	 * @param \phpbb\language\language	$language	Language object
 	 */
-	public function __construct(user $user)
+	public function __construct(\phpbb\language\language $language)
 	{
-		$this->user = $user;
+		$this->language = $language;
 	}
 
 	/**
@@ -41,7 +39,7 @@ class html_migrator_output_handler implements migrator_output_handler_interface
 	{
 		if ($verbosity <= migrator_output_handler_interface::VERBOSITY_VERBOSE)
 		{
-			$final_message = call_user_func_array(array($this->user, 'lang'), $message);
+			$final_message = $this->language->lang_array(array_shift($message), $message);
 			echo $final_message . "<br />\n";
 		}
 	}
diff --git a/phpBB/phpbb/db/output_handler/installer_migrator_output_handler.php b/phpBB/phpbb/db/output_handler/installer_migrator_output_handler.php
new file mode 100644
index 0000000000..56d5cf49a1
--- /dev/null
+++ b/phpBB/phpbb/db/output_handler/installer_migrator_output_handler.php
@@ -0,0 +1,46 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\db\output_handler;
+
+use phpbb\install\helper\iohandler\iohandler_interface;
+
+class installer_migrator_output_handler implements migrator_output_handler_interface
+{
+	/**
+	 * @var iohandler_interface
+	 */
+	protected $iohandler;
+
+	/**
+	 * Constructor
+	 *
+	 * @param iohandler_interface	$iohandler	Installer's IO-handler
+	 */
+	public function __construct(iohandler_interface $iohandler)
+	{
+		$this->iohandler = $iohandler;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function write($message, $verbosity)
+	{
+		if ($verbosity <= migrator_output_handler_interface::VERBOSITY_VERBOSE)
+		{
+			$this->iohandler->add_log_message($message);
+			$this->iohandler->send_response();
+		}
+	}
+}
diff --git a/phpBB/phpbb/db/log_wrapper_migrator_output_handler.php b/phpBB/phpbb/db/output_handler/log_wrapper_migrator_output_handler.php
index 94c293dc45..e4bd3ac8e0 100644
--- a/phpBB/phpbb/db/log_wrapper_migrator_output_handler.php
+++ b/phpBB/phpbb/db/output_handler/log_wrapper_migrator_output_handler.php
@@ -11,18 +11,16 @@
 *
 */
 
-namespace phpbb\db;
-
-use phpbb\user;
+namespace phpbb\db\output_handler;
 
 class log_wrapper_migrator_output_handler implements migrator_output_handler_interface
 {
 	/**
-	 * User object.
+	 * Language object.
 	 *
-	 * @var user
+	 * @var \phpbb\language\language
 	 */
-	protected $user;
+	protected $language;
 
 	/**
 	 * A migrator output handler
@@ -38,16 +36,23 @@ class log_wrapper_migrator_output_handler implements migrator_output_handler_int
 	protected $file_handle = false;
 
 	/**
+	 * @var \phpbb\filesystem\filesystem_interface
+	 */
+	protected $filesystem;
+
+	/**
 	 * Constructor
 	 *
-	 * @param user $user	User object
-	 * @param migrator_output_handler_interface $migrator Migrator output handler
-	 * @param string $log_file	File to log to
+	 * @param \phpbb\language\language					$language	Language object
+	 * @param migrator_output_handler_interface			$migrator	Migrator output handler
+	 * @param string									$log_file	File to log to
+	 * @param \phpbb\filesystem\filesystem_interface	$filesystem	phpBB filesystem object
 	 */
-	public function __construct(user $user, migrator_output_handler_interface $migrator, $log_file)
+	public function __construct(\phpbb\language\language $language, migrator_output_handler_interface $migrator, $log_file, \phpbb\filesystem\filesystem_interface $filesystem)
 	{
-		$this->user = $user;
+		$this->language = $language;
 		$this->migrator = $migrator;
+		$this->filesystem = $filesystem;
 		$this->file_open($log_file);
 	}
 
@@ -58,7 +63,7 @@ class log_wrapper_migrator_output_handler implements migrator_output_handler_int
 	 */
 	protected function file_open($file)
 	{
-		if (phpbb_is_writable(dirname($file)))
+		if ($this->filesystem->is_writable(dirname($file)))
 		{
 			$this->file_handle = fopen($file, 'w');
 		}
@@ -77,7 +82,8 @@ class log_wrapper_migrator_output_handler implements migrator_output_handler_int
 
 		if ($this->file_handle !== false)
 		{
-			$translated_message = call_user_func_array(array($this->user, 'lang'), $message) . "\n";
+
+			$translated_message = $this->language->lang_array(array_shift($message), $message);
 
 			if ($verbosity <= migrator_output_handler_interface::VERBOSITY_NORMAL)
 			{
@@ -88,7 +94,7 @@ class log_wrapper_migrator_output_handler implements migrator_output_handler_int
 				$translated_message = '[DEBUG] ' . $translated_message;
 			}
 
-			fwrite($this->file_handle, $translated_message);
+			fwrite($this->file_handle, $translated_message . "\n");
 			fflush($this->file_handle);
 		}
 	}
diff --git a/phpBB/phpbb/db/migrator_output_handler_interface.php b/phpBB/phpbb/db/output_handler/migrator_output_handler_interface.php
index 9947b51dcc..455d8aabbb 100644
--- a/phpBB/phpbb/db/migrator_output_handler_interface.php
+++ b/phpBB/phpbb/db/output_handler/migrator_output_handler_interface.php
@@ -11,7 +11,7 @@
 *
 */
 
-namespace phpbb\db;
+namespace phpbb\db\output_handler;
 
 interface migrator_output_handler_interface
 {
diff --git a/phpBB/phpbb/db/null_migrator_output_handler.php b/phpBB/phpbb/db/output_handler/null_migrator_output_handler.php
index 0e8cfbb049..5fc2a52577 100644
--- a/phpBB/phpbb/db/null_migrator_output_handler.php
+++ b/phpBB/phpbb/db/output_handler/null_migrator_output_handler.php
@@ -11,7 +11,7 @@
 *
 */
 
-namespace phpbb\db;
+namespace phpbb\db\output_handler;
 
 class null_migrator_output_handler implements migrator_output_handler_interface
 {
diff --git a/phpBB/phpbb/db/sql_insert_buffer.php b/phpBB/phpbb/db/sql_insert_buffer.php
index 18e4814a77..30e807b154 100644
--- a/phpBB/phpbb/db/sql_insert_buffer.php
+++ b/phpBB/phpbb/db/sql_insert_buffer.php
@@ -92,7 +92,7 @@ class sql_insert_buffer
 
 		// Flush buffer if it is full or when DB does not support multi inserts.
 		// In the later case, the buffer will always only contain one row.
-		if (!$this->db->get_multi_insert() || sizeof($this->buffer) >= $this->max_buffered_rows)
+		if (!$this->db->get_multi_insert() || count($this->buffer) >= $this->max_buffered_rows)
 		{
 			return $this->flush();
 		}
@@ -104,7 +104,7 @@ class sql_insert_buffer
 	* Inserts a row set, i.e. an array of rows, by calling insert().
 	*
 	* Please note that it is in most cases better to use insert() instead of
-	* first building a huge rowset. Or at least sizeof($rows) should be kept
+	* first building a huge rowset. Or at least count($rows) should be kept
 	* small.
 	*
 	* @param array $rows
diff --git a/phpBB/phpbb/db/tools.php b/phpBB/phpbb/db/tools.php
index 832a0c510c..4d1b91f7b4 100644
--- a/phpBB/phpbb/db/tools.php
+++ b/phpBB/phpbb/db/tools.php
@@ -14,2827 +14,8 @@
 namespace phpbb\db;
 
 /**
-* Database Tools for handling cross-db actions such as altering columns, etc.
-* Currently not supported is returning SQL for creating tables.
-*/
-class tools
+ * @deprecated	3.2.0-dev	(To be removed 3.3.0) use \phpbb\db\tools\tools instead
+ */
+class tools extends \phpbb\db\tools\tools
 {
-	/**
-	* Current sql layer
-	*/
-	var $sql_layer = '';
-
-	/**
-	* @var object DB object
-	*/
-	var $db = null;
-
-	/**
-	* The Column types for every database we support
-	* @var array
-	*/
-	var $dbms_type_map = array();
-
-	/**
-	* Is the used MS SQL Server a SQL Server 2000?
-	* @var bool
-	*/
-	protected $is_sql_server_2000;
-
-	/**
-	* Get the column types for every database we support
-	*
-	* @return array
-	*/
-	public static function get_dbms_type_map()
-	{
-		return array(
-			'mysql_41'	=> array(
-				'INT:'		=> 'int(%d)',
-				'BINT'		=> 'bigint(20)',
-				'UINT'		=> 'mediumint(8) UNSIGNED',
-				'UINT:'		=> 'int(%d) UNSIGNED',
-				'TINT:'		=> 'tinyint(%d)',
-				'USINT'		=> 'smallint(4) UNSIGNED',
-				'BOOL'		=> 'tinyint(1) UNSIGNED',
-				'VCHAR'		=> 'varchar(255)',
-				'VCHAR:'	=> 'varchar(%d)',
-				'CHAR:'		=> 'char(%d)',
-				'XSTEXT'	=> 'text',
-				'XSTEXT_UNI'=> 'varchar(100)',
-				'STEXT'		=> 'text',
-				'STEXT_UNI'	=> 'varchar(255)',
-				'TEXT'		=> 'text',
-				'TEXT_UNI'	=> 'text',
-				'MTEXT'		=> 'mediumtext',
-				'MTEXT_UNI'	=> 'mediumtext',
-				'TIMESTAMP'	=> 'int(11) UNSIGNED',
-				'DECIMAL'	=> 'decimal(5,2)',
-				'DECIMAL:'	=> 'decimal(%d,2)',
-				'PDECIMAL'	=> 'decimal(6,3)',
-				'PDECIMAL:'	=> 'decimal(%d,3)',
-				'VCHAR_UNI'	=> 'varchar(255)',
-				'VCHAR_UNI:'=> 'varchar(%d)',
-				'VCHAR_CI'	=> 'varchar(255)',
-				'VARBINARY'	=> 'varbinary(255)',
-			),
-
-			'mysql_40'	=> array(
-				'INT:'		=> 'int(%d)',
-				'BINT'		=> 'bigint(20)',
-				'UINT'		=> 'mediumint(8) UNSIGNED',
-				'UINT:'		=> 'int(%d) UNSIGNED',
-				'TINT:'		=> 'tinyint(%d)',
-				'USINT'		=> 'smallint(4) UNSIGNED',
-				'BOOL'		=> 'tinyint(1) UNSIGNED',
-				'VCHAR'		=> 'varbinary(255)',
-				'VCHAR:'	=> 'varbinary(%d)',
-				'CHAR:'		=> 'binary(%d)',
-				'XSTEXT'	=> 'blob',
-				'XSTEXT_UNI'=> 'blob',
-				'STEXT'		=> 'blob',
-				'STEXT_UNI'	=> 'blob',
-				'TEXT'		=> 'blob',
-				'TEXT_UNI'	=> 'blob',
-				'MTEXT'		=> 'mediumblob',
-				'MTEXT_UNI'	=> 'mediumblob',
-				'TIMESTAMP'	=> 'int(11) UNSIGNED',
-				'DECIMAL'	=> 'decimal(5,2)',
-				'DECIMAL:'	=> 'decimal(%d,2)',
-				'PDECIMAL'	=> 'decimal(6,3)',
-				'PDECIMAL:'	=> 'decimal(%d,3)',
-				'VCHAR_UNI'	=> 'blob',
-				'VCHAR_UNI:'=> array('varbinary(%d)', 'limit' => array('mult', 3, 255, 'blob')),
-				'VCHAR_CI'	=> 'blob',
-				'VARBINARY'	=> 'varbinary(255)',
-			),
-
-			'mssql'		=> array(
-				'INT:'		=> '[int]',
-				'BINT'		=> '[float]',
-				'UINT'		=> '[int]',
-				'UINT:'		=> '[int]',
-				'TINT:'		=> '[int]',
-				'USINT'		=> '[int]',
-				'BOOL'		=> '[int]',
-				'VCHAR'		=> '[varchar] (255)',
-				'VCHAR:'	=> '[varchar] (%d)',
-				'CHAR:'		=> '[char] (%d)',
-				'XSTEXT'	=> '[varchar] (1000)',
-				'STEXT'		=> '[varchar] (3000)',
-				'TEXT'		=> '[varchar] (8000)',
-				'MTEXT'		=> '[text]',
-				'XSTEXT_UNI'=> '[varchar] (100)',
-				'STEXT_UNI'	=> '[varchar] (255)',
-				'TEXT_UNI'	=> '[varchar] (4000)',
-				'MTEXT_UNI'	=> '[text]',
-				'TIMESTAMP'	=> '[int]',
-				'DECIMAL'	=> '[float]',
-				'DECIMAL:'	=> '[float]',
-				'PDECIMAL'	=> '[float]',
-				'PDECIMAL:'	=> '[float]',
-				'VCHAR_UNI'	=> '[varchar] (255)',
-				'VCHAR_UNI:'=> '[varchar] (%d)',
-				'VCHAR_CI'	=> '[varchar] (255)',
-				'VARBINARY'	=> '[varchar] (255)',
-			),
-
-			'mssqlnative'	=> array(
-				'INT:'		=> '[int]',
-				'BINT'		=> '[float]',
-				'UINT'		=> '[int]',
-				'UINT:'		=> '[int]',
-				'TINT:'		=> '[int]',
-				'USINT'		=> '[int]',
-				'BOOL'		=> '[int]',
-				'VCHAR'		=> '[varchar] (255)',
-				'VCHAR:'	=> '[varchar] (%d)',
-				'CHAR:'		=> '[char] (%d)',
-				'XSTEXT'	=> '[varchar] (1000)',
-				'STEXT'		=> '[varchar] (3000)',
-				'TEXT'		=> '[varchar] (8000)',
-				'MTEXT'		=> '[text]',
-				'XSTEXT_UNI'=> '[varchar] (100)',
-				'STEXT_UNI'	=> '[varchar] (255)',
-				'TEXT_UNI'	=> '[varchar] (4000)',
-				'MTEXT_UNI'	=> '[text]',
-				'TIMESTAMP'	=> '[int]',
-				'DECIMAL'	=> '[float]',
-				'DECIMAL:'	=> '[float]',
-				'PDECIMAL'	=> '[float]',
-				'PDECIMAL:'	=> '[float]',
-				'VCHAR_UNI'	=> '[varchar] (255)',
-				'VCHAR_UNI:'=> '[varchar] (%d)',
-				'VCHAR_CI'	=> '[varchar] (255)',
-				'VARBINARY'	=> '[varchar] (255)',
-			),
-
-			'oracle'	=> array(
-				'INT:'		=> 'number(%d)',
-				'BINT'		=> 'number(20)',
-				'UINT'		=> 'number(8)',
-				'UINT:'		=> 'number(%d)',
-				'TINT:'		=> 'number(%d)',
-				'USINT'		=> 'number(4)',
-				'BOOL'		=> 'number(1)',
-				'VCHAR'		=> 'varchar2(255)',
-				'VCHAR:'	=> 'varchar2(%d)',
-				'CHAR:'		=> 'char(%d)',
-				'XSTEXT'	=> 'varchar2(1000)',
-				'STEXT'		=> 'varchar2(3000)',
-				'TEXT'		=> 'clob',
-				'MTEXT'		=> 'clob',
-				'XSTEXT_UNI'=> 'varchar2(300)',
-				'STEXT_UNI'	=> 'varchar2(765)',
-				'TEXT_UNI'	=> 'clob',
-				'MTEXT_UNI'	=> 'clob',
-				'TIMESTAMP'	=> 'number(11)',
-				'DECIMAL'	=> 'number(5, 2)',
-				'DECIMAL:'	=> 'number(%d, 2)',
-				'PDECIMAL'	=> 'number(6, 3)',
-				'PDECIMAL:'	=> 'number(%d, 3)',
-				'VCHAR_UNI'	=> 'varchar2(765)',
-				'VCHAR_UNI:'=> array('varchar2(%d)', 'limit' => array('mult', 3, 765, 'clob')),
-				'VCHAR_CI'	=> 'varchar2(255)',
-				'VARBINARY'	=> 'raw(255)',
-			),
-
-			'sqlite'	=> array(
-				'INT:'		=> 'int(%d)',
-				'BINT'		=> 'bigint(20)',
-				'UINT'		=> 'INTEGER UNSIGNED', //'mediumint(8) UNSIGNED',
-				'UINT:'		=> 'INTEGER UNSIGNED', // 'int(%d) UNSIGNED',
-				'TINT:'		=> 'tinyint(%d)',
-				'USINT'		=> 'INTEGER UNSIGNED', //'mediumint(4) UNSIGNED',
-				'BOOL'		=> 'INTEGER UNSIGNED', //'tinyint(1) UNSIGNED',
-				'VCHAR'		=> 'varchar(255)',
-				'VCHAR:'	=> 'varchar(%d)',
-				'CHAR:'		=> 'char(%d)',
-				'XSTEXT'	=> 'text(65535)',
-				'STEXT'		=> 'text(65535)',
-				'TEXT'		=> 'text(65535)',
-				'MTEXT'		=> 'mediumtext(16777215)',
-				'XSTEXT_UNI'=> 'text(65535)',
-				'STEXT_UNI'	=> 'text(65535)',
-				'TEXT_UNI'	=> 'text(65535)',
-				'MTEXT_UNI'	=> 'mediumtext(16777215)',
-				'TIMESTAMP'	=> 'INTEGER UNSIGNED', //'int(11) UNSIGNED',
-				'DECIMAL'	=> 'decimal(5,2)',
-				'DECIMAL:'	=> 'decimal(%d,2)',
-				'PDECIMAL'	=> 'decimal(6,3)',
-				'PDECIMAL:'	=> 'decimal(%d,3)',
-				'VCHAR_UNI'	=> 'varchar(255)',
-				'VCHAR_UNI:'=> 'varchar(%d)',
-				'VCHAR_CI'	=> 'varchar(255)',
-				'VARBINARY'	=> 'blob',
-			),
-
-			'sqlite3'	=> array(
-				'INT:'		=> 'INT(%d)',
-				'BINT'		=> 'BIGINT(20)',
-				'UINT'		=> 'INTEGER UNSIGNED',
-				'UINT:'		=> 'INTEGER UNSIGNED',
-				'TINT:'		=> 'TINYINT(%d)',
-				'USINT'		=> 'INTEGER UNSIGNED',
-				'BOOL'		=> 'INTEGER UNSIGNED',
-				'VCHAR'		=> 'VARCHAR(255)',
-				'VCHAR:'	=> 'VARCHAR(%d)',
-				'CHAR:'		=> 'CHAR(%d)',
-				'XSTEXT'	=> 'TEXT(65535)',
-				'STEXT'		=> 'TEXT(65535)',
-				'TEXT'		=> 'TEXT(65535)',
-				'MTEXT'		=> 'MEDIUMTEXT(16777215)',
-				'XSTEXT_UNI'=> 'TEXT(65535)',
-				'STEXT_UNI'	=> 'TEXT(65535)',
-				'TEXT_UNI'	=> 'TEXT(65535)',
-				'MTEXT_UNI'	=> 'MEDIUMTEXT(16777215)',
-				'TIMESTAMP'	=> 'INTEGER UNSIGNED', //'int(11) UNSIGNED',
-				'DECIMAL'	=> 'DECIMAL(5,2)',
-				'DECIMAL:'	=> 'DECIMAL(%d,2)',
-				'PDECIMAL'	=> 'DECIMAL(6,3)',
-				'PDECIMAL:'	=> 'DECIMAL(%d,3)',
-				'VCHAR_UNI'	=> 'VARCHAR(255)',
-				'VCHAR_UNI:'=> 'VARCHAR(%d)',
-				'VCHAR_CI'	=> 'VARCHAR(255)',
-				'VARBINARY'	=> 'BLOB',
-			),
-
-			'postgres'	=> array(
-				'INT:'		=> 'INT4',
-				'BINT'		=> 'INT8',
-				'UINT'		=> 'INT4', // unsigned
-				'UINT:'		=> 'INT4', // unsigned
-				'USINT'		=> 'INT2', // unsigned
-				'BOOL'		=> 'INT2', // unsigned
-				'TINT:'		=> 'INT2',
-				'VCHAR'		=> 'varchar(255)',
-				'VCHAR:'	=> 'varchar(%d)',
-				'CHAR:'		=> 'char(%d)',
-				'XSTEXT'	=> 'varchar(1000)',
-				'STEXT'		=> 'varchar(3000)',
-				'TEXT'		=> 'varchar(8000)',
-				'MTEXT'		=> 'TEXT',
-				'XSTEXT_UNI'=> 'varchar(100)',
-				'STEXT_UNI'	=> 'varchar(255)',
-				'TEXT_UNI'	=> 'varchar(4000)',
-				'MTEXT_UNI'	=> 'TEXT',
-				'TIMESTAMP'	=> 'INT4', // unsigned
-				'DECIMAL'	=> 'decimal(5,2)',
-				'DECIMAL:'	=> 'decimal(%d,2)',
-				'PDECIMAL'	=> 'decimal(6,3)',
-				'PDECIMAL:'	=> 'decimal(%d,3)',
-				'VCHAR_UNI'	=> 'varchar(255)',
-				'VCHAR_UNI:'=> 'varchar(%d)',
-				'VCHAR_CI'	=> 'varchar_ci',
-				'VARBINARY'	=> 'bytea',
-			),
-		);
-	}
-
-	/**
-	* A list of types being unsigned for better reference in some db's
-	* @var array
-	*/
-	var $unsigned_types = array('UINT', 'UINT:', 'USINT', 'BOOL', 'TIMESTAMP');
-
-	/**
-	* A list of supported DBMS. We change this class to support more DBMS, the DBMS itself only need to follow some rules.
-	* @var array
-	*/
-	var $supported_dbms = array('mssql', 'mssqlnative', 'mysql_40', 'mysql_41', 'oracle', 'postgres', 'sqlite', 'sqlite3');
-
-	/**
-	* This is set to true if user only wants to return the 'to-be-executed' SQL statement(s) (as an array).
-	* This mode has no effect on some methods (inserting of data for example). This is expressed within the methods command.
-	*/
-	var $return_statements = false;
-
-	/**
-	* Constructor. Set DB Object and set {@link $return_statements return_statements}.
-	*
-	* @param \phpbb\db\driver\driver_interface	$db					Database connection
-	* @param bool		$return_statements	True if only statements should be returned and no SQL being executed
-	*/
-	public function __construct(\phpbb\db\driver\driver_interface $db, $return_statements = false)
-	{
-		$this->db = $db;
-		$this->return_statements = $return_statements;
-
-		$this->dbms_type_map = self::get_dbms_type_map();
-
-		// Determine mapping database type
-		switch ($this->db->get_sql_layer())
-		{
-			case 'mysql':
-				$this->sql_layer = 'mysql_40';
-			break;
-
-			case 'mysql4':
-				if (version_compare($this->db->sql_server_info(true), '4.1.3', '>='))
-				{
-					$this->sql_layer = 'mysql_41';
-				}
-				else
-				{
-					$this->sql_layer = 'mysql_40';
-				}
-			break;
-
-			case 'mysqli':
-				$this->sql_layer = 'mysql_41';
-			break;
-
-			case 'mssql':
-			case 'mssql_odbc':
-				$this->sql_layer = 'mssql';
-			break;
-
-			case 'mssqlnative':
-				$this->sql_layer = 'mssqlnative';
-			break;
-
-			default:
-				$this->sql_layer = $this->db->get_sql_layer();
-			break;
-		}
-	}
-
-	/**
-	* Setter for {@link $return_statements return_statements}.
-	*
-	* @param bool $return_statements True if SQL should not be executed but returned as strings
-	* @return null
-	*/
-	public function set_return_statements($return_statements)
-	{
-		$this->return_statements = $return_statements;
-	}
-
-	/**
-	* Gets a list of tables in the database.
-	*
-	* @return array		Array of table names  (all lower case)
-	*/
-	function sql_list_tables()
-	{
-		switch ($this->db->get_sql_layer())
-		{
-			case 'mysql':
-			case 'mysql4':
-			case 'mysqli':
-				$sql = 'SHOW TABLES';
-			break;
-
-			case 'sqlite':
-				$sql = 'SELECT name
-					FROM sqlite_master
-					WHERE type = "table"';
-			break;
-
-			case 'sqlite3':
-				$sql = 'SELECT name
-					FROM sqlite_master
-					WHERE type = "table"
-						AND name <> "sqlite_sequence"';
-			break;
-
-			case 'mssql':
-			case 'mssql_odbc':
-			case 'mssqlnative':
-				$sql = "SELECT name
-					FROM sysobjects
-					WHERE type='U'";
-			break;
-
-			case 'postgres':
-				$sql = 'SELECT relname
-					FROM pg_stat_user_tables';
-			break;
-
-			case 'oracle':
-				$sql = 'SELECT table_name
-					FROM USER_TABLES';
-			break;
-		}
-
-		$result = $this->db->sql_query($sql);
-
-		$tables = array();
-		while ($row = $this->db->sql_fetchrow($result))
-		{
-			$name = current($row);
-			$tables[$name] = $name;
-		}
-		$this->db->sql_freeresult($result);
-
-		return $tables;
-	}
-
-	/**
-	* Check if table exists
-	*
-	*
-	* @param string	$table_name	The table name to check for
-	* @return bool true if table exists, else false
-	*/
-	function sql_table_exists($table_name)
-	{
-		$this->db->sql_return_on_error(true);
-		$result = $this->db->sql_query_limit('SELECT * FROM ' . $table_name, 1);
-		$this->db->sql_return_on_error(false);
-
-		if ($result)
-		{
-			$this->db->sql_freeresult($result);
-			return true;
-		}
-
-		return false;
-	}
-
-	/**
-	* Create SQL Table
-	*
-	* @param string	$table_name	The table name to create
-	* @param array	$table_data	Array containing table data.
-	* @return array	Statements if $return_statements is true.
-	*/
-	function sql_create_table($table_name, $table_data)
-	{
-		// holds the DDL for a column
-		$columns = $statements = array();
-
-		if ($this->sql_table_exists($table_name))
-		{
-			return $this->_sql_run_sql($statements);
-		}
-
-		// Begin transaction
-		$statements[] = 'begin';
-
-		// Determine if we have created a PRIMARY KEY in the earliest
-		$primary_key_gen = false;
-
-		// Determine if the table requires a sequence
-		$create_sequence = false;
-
-		// Begin table sql statement
-		switch ($this->sql_layer)
-		{
-			case 'mssql':
-			case 'mssqlnative':
-				$table_sql = 'CREATE TABLE [' . $table_name . '] (' . "\n";
-			break;
-
-			default:
-				$table_sql = 'CREATE TABLE ' . $table_name . ' (' . "\n";
-			break;
-		}
-
-		if ($this->sql_layer == 'mssql' || $this->sql_layer == 'mssqlnative')
-		{
-			if (!isset($table_data['PRIMARY_KEY']))
-			{
-				$table_data['COLUMNS']['mssqlindex'] = array('UINT', null, 'auto_increment');
-				$table_data['PRIMARY_KEY'] = 'mssqlindex';
-			}
-		}
-
-		// Iterate through the columns to create a table
-		foreach ($table_data['COLUMNS'] as $column_name => $column_data)
-		{
-			// here lies an array, filled with information compiled on the column's data
-			$prepared_column = $this->sql_prepare_column_data($table_name, $column_name, $column_data);
-
-			if (isset($prepared_column['auto_increment']) && $prepared_column['auto_increment'] && strlen($column_name) > 26) // "${column_name}_gen"
-			{
-				trigger_error("Index name '${column_name}_gen' on table '$table_name' is too long. The maximum auto increment column length is 26 characters.", E_USER_ERROR);
-			}
-
-			// here we add the definition of the new column to the list of columns
-			switch ($this->sql_layer)
-			{
-				case 'mssql':
-				case 'mssqlnative':
-					$columns[] = "\t [{$column_name}] " . $prepared_column['column_type_sql_default'];
-				break;
-
-				default:
-					$columns[] = "\t {$column_name} " . $prepared_column['column_type_sql'];
-				break;
-			}
-
-			// see if we have found a primary key set due to a column definition if we have found it, we can stop looking
-			if (!$primary_key_gen)
-			{
-				$primary_key_gen = isset($prepared_column['primary_key_set']) && $prepared_column['primary_key_set'];
-			}
-
-			// create sequence DDL based off of the existance of auto incrementing columns
-			if (!$create_sequence && isset($prepared_column['auto_increment']) && $prepared_column['auto_increment'])
-			{
-				$create_sequence = $column_name;
-			}
-		}
-
-		// this makes up all the columns in the create table statement
-		$table_sql .= implode(",\n", $columns);
-
-		// Close the table for two DBMS and add to the statements
-		switch ($this->sql_layer)
-		{
-			case 'mssql':
-			case 'mssqlnative':
-				$table_sql .= "\n);";
-				$statements[] = $table_sql;
-			break;
-		}
-
-		// we have yet to create a primary key for this table,
-		// this means that we can add the one we really wanted instead
-		if (!$primary_key_gen)
-		{
-			// Write primary key
-			if (isset($table_data['PRIMARY_KEY']))
-			{
-				if (!is_array($table_data['PRIMARY_KEY']))
-				{
-					$table_data['PRIMARY_KEY'] = array($table_data['PRIMARY_KEY']);
-				}
-
-				switch ($this->sql_layer)
-				{
-					case 'mysql_40':
-					case 'mysql_41':
-					case 'postgres':
-					case 'sqlite':
-					case 'sqlite3':
-						$table_sql .= ",\n\t PRIMARY KEY (" . implode(', ', $table_data['PRIMARY_KEY']) . ')';
-					break;
-
-					case 'mssql':
-					case 'mssqlnative':
-						// We need the data here
-						$old_return_statements = $this->return_statements;
-						$this->return_statements = true;
-
-						$primary_key_stmts = $this->sql_create_primary_key($table_name, $table_data['PRIMARY_KEY']);
-						foreach ($primary_key_stmts as $pk_stmt)
-						{
-							$statements[] = $pk_stmt;
-						}
-
-						$this->return_statements = $old_return_statements;
-					break;
-
-					case 'oracle':
-						$table_sql .= ",\n\t CONSTRAINT pk_{$table_name} PRIMARY KEY (" . implode(', ', $table_data['PRIMARY_KEY']) . ')';
-					break;
-				}
-			}
-		}
-
-		// close the table
-		switch ($this->sql_layer)
-		{
-			case 'mysql_41':
-				// make sure the table is in UTF-8 mode
-				$table_sql .= "\n) CHARACTER SET `utf8` COLLATE `utf8_bin`;";
-				$statements[] = $table_sql;
-			break;
-
-			case 'mysql_40':
-			case 'sqlite':
-			case 'sqlite3':
-				$table_sql .= "\n);";
-				$statements[] = $table_sql;
-			break;
-
-			case 'postgres':
-				// do we need to add a sequence for auto incrementing columns?
-				if ($create_sequence)
-				{
-					$statements[] = "CREATE SEQUENCE {$table_name}_seq;";
-				}
-
-				$table_sql .= "\n);";
-				$statements[] = $table_sql;
-			break;
-
-			case 'oracle':
-				$table_sql .= "\n)";
-				$statements[] = $table_sql;
-
-				// do we need to add a sequence and a tigger for auto incrementing columns?
-				if ($create_sequence)
-				{
-					// create the actual sequence
-					$statements[] = "CREATE SEQUENCE {$table_name}_seq";
-
-					// the trigger is the mechanism by which we increment the counter
-					$trigger = "CREATE OR REPLACE TRIGGER t_{$table_name}\n";
-					$trigger .= "BEFORE INSERT ON {$table_name}\n";
-					$trigger .= "FOR EACH ROW WHEN (\n";
-					$trigger .= "\tnew.{$create_sequence} IS NULL OR new.{$create_sequence} = 0\n";
-					$trigger .= ")\n";
-					$trigger .= "BEGIN\n";
-					$trigger .= "\tSELECT {$table_name}_seq.nextval\n";
-					$trigger .= "\tINTO :new.{$create_sequence}\n";
-					$trigger .= "\tFROM dual;\n";
-					$trigger .= "END;";
-
-					$statements[] = $trigger;
-				}
-			break;
-		}
-
-		// Write Keys
-		if (isset($table_data['KEYS']))
-		{
-			foreach ($table_data['KEYS'] as $key_name => $key_data)
-			{
-				if (!is_array($key_data[1]))
-				{
-					$key_data[1] = array($key_data[1]);
-				}
-
-				$old_return_statements = $this->return_statements;
-				$this->return_statements = true;
-
-				$key_stmts = ($key_data[0] == 'UNIQUE') ? $this->sql_create_unique_index($table_name, $key_name, $key_data[1]) : $this->sql_create_index($table_name, $key_name, $key_data[1]);
-
-				foreach ($key_stmts as $key_stmt)
-				{
-					$statements[] = $key_stmt;
-				}
-
-				$this->return_statements = $old_return_statements;
-			}
-		}
-
-		// Commit Transaction
-		$statements[] = 'commit';
-
-		return $this->_sql_run_sql($statements);
-	}
-
-	/**
-	* Handle passed database update array.
-	* Expected structure...
-	* Key being one of the following
-	*	drop_tables: Drop tables
-	*	add_tables: Add tables
-	*	change_columns: Column changes (only type, not name)
-	*	add_columns: Add columns to a table
-	*	drop_keys: Dropping keys
-	*	drop_columns: Removing/Dropping columns
-	*	add_primary_keys: adding primary keys
-	*	add_unique_index: adding an unique index
-	*	add_index: adding an index (can be column:index_size if you need to provide size)
-	*
-	* The values are in this format:
-	*		{TABLE NAME}		=> array(
-	*			{COLUMN NAME}		=> array({COLUMN TYPE}, {DEFAULT VALUE}, {OPTIONAL VARIABLES}),
-	*			{KEY/INDEX NAME}	=> array({COLUMN NAMES}),
-	*		)
-	*
-	* For more information have a look at /develop/create_schema_files.php (only available through SVN)
-	*/
-	function perform_schema_changes($schema_changes)
-	{
-		if (empty($schema_changes))
-		{
-			return;
-		}
-
-		$statements = array();
-		$sqlite = false;
-
-		// For SQLite we need to perform the schema changes in a much more different way
-		if (($this->db->get_sql_layer() == 'sqlite' || $this->db->get_sql_layer() == 'sqlite3') && $this->return_statements)
-		{
-			$sqlite_data = array();
-			$sqlite = true;
-		}
-
-		// Drop tables?
-		if (!empty($schema_changes['drop_tables']))
-		{
-			foreach ($schema_changes['drop_tables'] as $table)
-			{
-				// only drop table if it exists
-				if ($this->sql_table_exists($table))
-				{
-					$result = $this->sql_table_drop($table);
-					if ($this->return_statements)
-					{
-						$statements = array_merge($statements, $result);
-					}
-				}
-			}
-		}
-
-		// Add tables?
-		if (!empty($schema_changes['add_tables']))
-		{
-			foreach ($schema_changes['add_tables'] as $table => $table_data)
-			{
-				$result = $this->sql_create_table($table, $table_data);
-				if ($this->return_statements)
-				{
-					$statements = array_merge($statements, $result);
-				}
-			}
-		}
-
-		// Change columns?
-		if (!empty($schema_changes['change_columns']))
-		{
-			foreach ($schema_changes['change_columns'] as $table => $columns)
-			{
-				foreach ($columns as $column_name => $column_data)
-				{
-					// If the column exists we change it, else we add it ;)
-					if ($column_exists = $this->sql_column_exists($table, $column_name))
-					{
-						$result = $this->sql_column_change($table, $column_name, $column_data, true);
-					}
-					else
-					{
-						$result = $this->sql_column_add($table, $column_name, $column_data, true);
-					}
-
-					if ($sqlite)
-					{
-						if ($column_exists)
-						{
-							$sqlite_data[$table]['change_columns'][] = $result;
-						}
-						else
-						{
-							$sqlite_data[$table]['add_columns'][] = $result;
-						}
-					}
-					else if ($this->return_statements)
-					{
-						$statements = array_merge($statements, $result);
-					}
-				}
-			}
-		}
-
-		// Add columns?
-		if (!empty($schema_changes['add_columns']))
-		{
-			foreach ($schema_changes['add_columns'] as $table => $columns)
-			{
-				foreach ($columns as $column_name => $column_data)
-				{
-					// Only add the column if it does not exist yet
-					if ($column_exists = $this->sql_column_exists($table, $column_name))
-					{
-						continue;
-						// This is commented out here because it can take tremendous time on updates
-//						$result = $this->sql_column_change($table, $column_name, $column_data, true);
-					}
-					else
-					{
-						$result = $this->sql_column_add($table, $column_name, $column_data, true);
-					}
-
-					if ($sqlite)
-					{
-						if ($column_exists)
-						{
-							continue;
-//							$sqlite_data[$table]['change_columns'][] = $result;
-						}
-						else
-						{
-							$sqlite_data[$table]['add_columns'][] = $result;
-						}
-					}
-					else if ($this->return_statements)
-					{
-						$statements = array_merge($statements, $result);
-					}
-				}
-			}
-		}
-
-		// Remove keys?
-		if (!empty($schema_changes['drop_keys']))
-		{
-			foreach ($schema_changes['drop_keys'] as $table => $indexes)
-			{
-				foreach ($indexes as $index_name)
-				{
-					if (!$this->sql_index_exists($table, $index_name))
-					{
-						continue;
-					}
-
-					$result = $this->sql_index_drop($table, $index_name);
-
-					if ($this->return_statements)
-					{
-						$statements = array_merge($statements, $result);
-					}
-				}
-			}
-		}
-
-		// Drop columns?
-		if (!empty($schema_changes['drop_columns']))
-		{
-			foreach ($schema_changes['drop_columns'] as $table => $columns)
-			{
-				foreach ($columns as $column)
-				{
-					// Only remove the column if it exists...
-					if ($this->sql_column_exists($table, $column))
-					{
-						$result = $this->sql_column_remove($table, $column, true);
-
-						if ($sqlite)
-						{
-							$sqlite_data[$table]['drop_columns'][] = $result;
-						}
-						else if ($this->return_statements)
-						{
-							$statements = array_merge($statements, $result);
-						}
-					}
-				}
-			}
-		}
-
-		// Add primary keys?
-		if (!empty($schema_changes['add_primary_keys']))
-		{
-			foreach ($schema_changes['add_primary_keys'] as $table => $columns)
-			{
-				$result = $this->sql_create_primary_key($table, $columns, true);
-
-				if ($sqlite)
-				{
-					$sqlite_data[$table]['primary_key'] = $result;
-				}
-				else if ($this->return_statements)
-				{
-					$statements = array_merge($statements, $result);
-				}
-			}
-		}
-
-		// Add unique indexes?
-		if (!empty($schema_changes['add_unique_index']))
-		{
-			foreach ($schema_changes['add_unique_index'] as $table => $index_array)
-			{
-				foreach ($index_array as $index_name => $column)
-				{
-					if ($this->sql_unique_index_exists($table, $index_name))
-					{
-						continue;
-					}
-
-					$result = $this->sql_create_unique_index($table, $index_name, $column);
-
-					if ($this->return_statements)
-					{
-						$statements = array_merge($statements, $result);
-					}
-				}
-			}
-		}
-
-		// Add indexes?
-		if (!empty($schema_changes['add_index']))
-		{
-			foreach ($schema_changes['add_index'] as $table => $index_array)
-			{
-				foreach ($index_array as $index_name => $column)
-				{
-					if ($this->sql_index_exists($table, $index_name))
-					{
-						continue;
-					}
-
-					$result = $this->sql_create_index($table, $index_name, $column);
-
-					if ($this->return_statements)
-					{
-						$statements = array_merge($statements, $result);
-					}
-				}
-			}
-		}
-
-		if ($sqlite)
-		{
-			foreach ($sqlite_data as $table_name => $sql_schema_changes)
-			{
-				// Create temporary table with original data
-				$statements[] = 'begin';
-
-				$sql = "SELECT sql
-					FROM sqlite_master
-					WHERE type = 'table'
-						AND name = '{$table_name}'
-					ORDER BY type DESC, name;";
-				$result = $this->db->sql_query($sql);
-
-				if (!$result)
-				{
-					continue;
-				}
-
-				$row = $this->db->sql_fetchrow($result);
-				$this->db->sql_freeresult($result);
-
-				// Create a backup table and populate it, destroy the existing one
-				$statements[] = preg_replace('#CREATE\s+TABLE\s+"?' . $table_name . '"?#i', 'CREATE TEMPORARY TABLE ' . $table_name . '_temp', $row['sql']);
-				$statements[] = 'INSERT INTO ' . $table_name . '_temp SELECT * FROM ' . $table_name;
-				$statements[] = 'DROP TABLE ' . $table_name;
-
-				// Get the columns...
-				preg_match('#\((.*)\)#s', $row['sql'], $matches);
-
-				$plain_table_cols = trim($matches[1]);
-				$new_table_cols = preg_split('/,(?![\s\w]+\))/m', $plain_table_cols);
-				$column_list = array();
-
-				foreach ($new_table_cols as $declaration)
-				{
-					$entities = preg_split('#\s+#', trim($declaration));
-					if ($entities[0] == 'PRIMARY')
-					{
-						continue;
-					}
-					$column_list[] = $entities[0];
-				}
-
-				// note down the primary key notation because sqlite only supports adding it to the end for the new table
-				$primary_key = false;
-				$_new_cols = array();
-
-				foreach ($new_table_cols as $key => $declaration)
-				{
-					$entities = preg_split('#\s+#', trim($declaration));
-					if ($entities[0] == 'PRIMARY')
-					{
-						$primary_key = $declaration;
-						continue;
-					}
-					$_new_cols[] = $declaration;
-				}
-
-				$new_table_cols = $_new_cols;
-
-				// First of all... change columns
-				if (!empty($sql_schema_changes['change_columns']))
-				{
-					foreach ($sql_schema_changes['change_columns'] as $column_sql)
-					{
-						foreach ($new_table_cols as $key => $declaration)
-						{
-							$entities = preg_split('#\s+#', trim($declaration));
-							if (strpos($column_sql, $entities[0] . ' ') === 0)
-							{
-								$new_table_cols[$key] = $column_sql;
-							}
-						}
-					}
-				}
-
-				if (!empty($sql_schema_changes['add_columns']))
-				{
-					foreach ($sql_schema_changes['add_columns'] as $column_sql)
-					{
-						$new_table_cols[] = $column_sql;
-					}
-				}
-
-				// Now drop them...
-				if (!empty($sql_schema_changes['drop_columns']))
-				{
-					foreach ($sql_schema_changes['drop_columns'] as $column_name)
-					{
-						// Remove from column list...
-						$new_column_list = array();
-						foreach ($column_list as $key => $value)
-						{
-							if ($value === $column_name)
-							{
-								continue;
-							}
-
-							$new_column_list[] = $value;
-						}
-
-						$column_list = $new_column_list;
-
-						// Remove from table...
-						$_new_cols = array();
-						foreach ($new_table_cols as $key => $declaration)
-						{
-							$entities = preg_split('#\s+#', trim($declaration));
-							if (strpos($column_name . ' ', $entities[0] . ' ') === 0)
-							{
-								continue;
-							}
-							$_new_cols[] = $declaration;
-						}
-						$new_table_cols = $_new_cols;
-					}
-				}
-
-				// Primary key...
-				if (!empty($sql_schema_changes['primary_key']))
-				{
-					$new_table_cols[] = 'PRIMARY KEY (' . implode(', ', $sql_schema_changes['primary_key']) . ')';
-				}
-				// Add a new one or the old primary key
-				else if ($primary_key !== false)
-				{
-					$new_table_cols[] = $primary_key;
-				}
-
-				$columns = implode(',', $column_list);
-
-				// create a new table and fill it up. destroy the temp one
-				$statements[] = 'CREATE TABLE ' . $table_name . ' (' . implode(',', $new_table_cols) . ');';
-				$statements[] = 'INSERT INTO ' . $table_name . ' (' . $columns . ') SELECT ' . $columns . ' FROM ' . $table_name . '_temp;';
-				$statements[] = 'DROP TABLE ' . $table_name . '_temp';
-
-				$statements[] = 'commit';
-			}
-		}
-
-		if ($this->return_statements)
-		{
-			return $statements;
-		}
-	}
-
-	/**
-	* Gets a list of columns of a table.
-	*
-	* @param string $table		Table name
-	*
-	* @return array				Array of column names (all lower case)
-	*/
-	function sql_list_columns($table)
-	{
-		$columns = array();
-
-		switch ($this->sql_layer)
-		{
-			case 'mysql_40':
-			case 'mysql_41':
-				$sql = "SHOW COLUMNS FROM $table";
-			break;
-
-			// PostgreSQL has a way of doing this in a much simpler way but would
-			// not allow us to support all versions of PostgreSQL
-			case 'postgres':
-				$sql = "SELECT a.attname
-					FROM pg_class c, pg_attribute a
-					WHERE c.relname = '{$table}'
-						AND a.attnum > 0
-						AND a.attrelid = c.oid";
-			break;
-
-			// same deal with PostgreSQL, we must perform more complex operations than
-			// we technically could
-			case 'mssql':
-			case 'mssqlnative':
-				$sql = "SELECT c.name
-					FROM syscolumns c
-					LEFT JOIN sysobjects o ON c.id = o.id
-					WHERE o.name = '{$table}'";
-			break;
-
-			case 'oracle':
-				$sql = "SELECT column_name
-					FROM user_tab_columns
-					WHERE LOWER(table_name) = '" . strtolower($table) . "'";
-			break;
-
-			case 'sqlite':
-			case 'sqlite3':
-				$sql = "SELECT sql
-					FROM sqlite_master
-					WHERE type = 'table'
-						AND name = '{$table}'";
-
-				$result = $this->db->sql_query($sql);
-
-				if (!$result)
-				{
-					return false;
-				}
-
-				$row = $this->db->sql_fetchrow($result);
-				$this->db->sql_freeresult($result);
-
-				preg_match('#\((.*)\)#s', $row['sql'], $matches);
-
-				$cols = trim($matches[1]);
-				$col_array = preg_split('/,(?![\s\w]+\))/m', $cols);
-
-				foreach ($col_array as $declaration)
-				{
-					$entities = preg_split('#\s+#', trim($declaration));
-					if ($entities[0] == 'PRIMARY')
-					{
-						continue;
-					}
-
-					$column = strtolower($entities[0]);
-					$columns[$column] = $column;
-				}
-
-				return $columns;
-			break;
-		}
-
-		$result = $this->db->sql_query($sql);
-
-		while ($row = $this->db->sql_fetchrow($result))
-		{
-			$column = strtolower(current($row));
-			$columns[$column] = $column;
-		}
-		$this->db->sql_freeresult($result);
-
-		return $columns;
-	}
-
-	/**
-	* Check whether a specified column exist in a table
-	*
-	* @param string	$table			Table to check
-	* @param string	$column_name	Column to check
-	*
-	* @return bool		True if column exists, false otherwise
-	*/
-	function sql_column_exists($table, $column_name)
-	{
-		$columns = $this->sql_list_columns($table);
-
-		return isset($columns[$column_name]);
-	}
-
-	/**
-	* Check if a specified index exists in table. Does not return PRIMARY KEY and UNIQUE indexes.
-	*
-	* @param string	$table_name		Table to check the index at
-	* @param string	$index_name		The index name to check
-	*
-	* @return bool True if index exists, else false
-	*/
-	function sql_index_exists($table_name, $index_name)
-	{
-		if ($this->sql_layer == 'mssql' || $this->sql_layer == 'mssqlnative')
-		{
-			$sql = "EXEC sp_statistics '$table_name'";
-			$result = $this->db->sql_query($sql);
-
-			while ($row = $this->db->sql_fetchrow($result))
-			{
-				if ($row['TYPE'] == 3)
-				{
-					if (strtolower($row['INDEX_NAME']) == strtolower($index_name))
-					{
-						$this->db->sql_freeresult($result);
-						return true;
-					}
-				}
-			}
-			$this->db->sql_freeresult($result);
-
-			return false;
-		}
-
-		switch ($this->sql_layer)
-		{
-			case 'postgres':
-				$sql = "SELECT ic.relname as index_name
-					FROM pg_class bc, pg_class ic, pg_index i
-					WHERE (bc.oid = i.indrelid)
-						AND (ic.oid = i.indexrelid)
-						AND (bc.relname = '" . $table_name . "')
-						AND (i.indisunique != 't')
-						AND (i.indisprimary != 't')";
-				$col = 'index_name';
-			break;
-
-			case 'mysql_40':
-			case 'mysql_41':
-				$sql = 'SHOW KEYS
-					FROM ' . $table_name;
-				$col = 'Key_name';
-			break;
-
-			case 'oracle':
-				$sql = "SELECT index_name
-					FROM user_indexes
-					WHERE table_name = '" . strtoupper($table_name) . "'
-						AND generated = 'N'
-						AND uniqueness = 'NONUNIQUE'";
-				$col = 'index_name';
-			break;
-
-			case 'sqlite':
-			case 'sqlite3':
-				$sql = "PRAGMA index_list('" . $table_name . "');";
-				$col = 'name';
-			break;
-		}
-
-		$result = $this->db->sql_query($sql);
-		while ($row = $this->db->sql_fetchrow($result))
-		{
-			if (($this->sql_layer == 'mysql_40' || $this->sql_layer == 'mysql_41') && !$row['Non_unique'])
-			{
-				continue;
-			}
-
-			// These DBMS prefix index name with the table name
-			switch ($this->sql_layer)
-			{
-				case 'oracle':
-				case 'postgres':
-				case 'sqlite':
-				case 'sqlite3':
-					$row[$col] = substr($row[$col], strlen($table_name) + 1);
-				break;
-			}
-
-			if (strtolower($row[$col]) == strtolower($index_name))
-			{
-				$this->db->sql_freeresult($result);
-				return true;
-			}
-		}
-		$this->db->sql_freeresult($result);
-
-		return false;
-	}
-
-	/**
-	* Check if a specified index exists in table. Does not return PRIMARY KEY indexes.
-	*
-	* @param string	$table_name		Table to check the index at
-	* @param string	$index_name		The index name to check
-	*
-	* @return bool True if index exists, else false
-	*/
-	function sql_unique_index_exists($table_name, $index_name)
-	{
-		if ($this->sql_layer == 'mssql' || $this->sql_layer == 'mssqlnative')
-		{
-			$sql = "EXEC sp_statistics '$table_name'";
-			$result = $this->db->sql_query($sql);
-
-			while ($row = $this->db->sql_fetchrow($result))
-			{
-				// Usually NON_UNIQUE is the column we want to check, but we allow for both
-				if ($row['TYPE'] == 3)
-				{
-					if (strtolower($row['INDEX_NAME']) == strtolower($index_name))
-					{
-						$this->db->sql_freeresult($result);
-						return true;
-					}
-				}
-			}
-			$this->db->sql_freeresult($result);
-			return false;
-		}
-
-		switch ($this->sql_layer)
-		{
-			case 'postgres':
-				$sql = "SELECT ic.relname as index_name, i.indisunique
-					FROM pg_class bc, pg_class ic, pg_index i
-					WHERE (bc.oid = i.indrelid)
-						AND (ic.oid = i.indexrelid)
-						AND (bc.relname = '" . $table_name . "')
-						AND (i.indisprimary != 't')";
-				$col = 'index_name';
-			break;
-
-			case 'mysql_40':
-			case 'mysql_41':
-				$sql = 'SHOW KEYS
-					FROM ' . $table_name;
-				$col = 'Key_name';
-			break;
-
-			case 'oracle':
-				$sql = "SELECT index_name, table_owner
-					FROM user_indexes
-					WHERE table_name = '" . strtoupper($table_name) . "'
-						AND generated = 'N'
-						AND uniqueness = 'UNIQUE'";
-				$col = 'index_name';
-			break;
-
-			case 'sqlite':
-			case 'sqlite3':
-				$sql = "PRAGMA index_list('" . $table_name . "');";
-				$col = 'name';
-			break;
-		}
-
-		$result = $this->db->sql_query($sql);
-		while ($row = $this->db->sql_fetchrow($result))
-		{
-			if (($this->sql_layer == 'mysql_40' || $this->sql_layer == 'mysql_41') && ($row['Non_unique'] || $row[$col] == 'PRIMARY'))
-			{
-				continue;
-			}
-
-			if (($this->sql_layer == 'sqlite' || $this->sql_layer == 'sqlite3') && !$row['unique'])
-			{
-				continue;
-			}
-
-			if ($this->sql_layer == 'postgres' && $row['indisunique'] != 't')
-			{
-				continue;
-			}
-
-			// These DBMS prefix index name with the table name
-			switch ($this->sql_layer)
-			{
-				case 'oracle':
-					// Two cases here... prefixed with U_[table_owner] and not prefixed with table_name
-					if (strpos($row[$col], 'U_') === 0)
-					{
-						$row[$col] = substr($row[$col], strlen('U_' . $row['table_owner']) + 1);
-					}
-					else if (strpos($row[$col], strtoupper($table_name)) === 0)
-					{
-						$row[$col] = substr($row[$col], strlen($table_name) + 1);
-					}
-				break;
-
-				case 'postgres':
-				case 'sqlite':
-				case 'sqlite3':
-					$row[$col] = substr($row[$col], strlen($table_name) + 1);
-				break;
-			}
-
-			if (strtolower($row[$col]) == strtolower($index_name))
-			{
-				$this->db->sql_freeresult($result);
-				return true;
-			}
-		}
-		$this->db->sql_freeresult($result);
-
-		return false;
-	}
-
-	/**
-	* Private method for performing sql statements (either execute them or return them)
-	* @access private
-	*/
-	function _sql_run_sql($statements)
-	{
-		if ($this->return_statements)
-		{
-			return $statements;
-		}
-
-		// We could add error handling here...
-		foreach ($statements as $sql)
-		{
-			if ($sql === 'begin')
-			{
-				$this->db->sql_transaction('begin');
-			}
-			else if ($sql === 'commit')
-			{
-				$this->db->sql_transaction('commit');
-			}
-			else
-			{
-				$this->db->sql_query($sql);
-			}
-		}
-
-		return true;
-	}
-
-	/**
-	* Function to prepare some column information for better usage
-	* @access private
-	*/
-	function sql_prepare_column_data($table_name, $column_name, $column_data)
-	{
-		if (strlen($column_name) > 30)
-		{
-			trigger_error("Column name '$column_name' on table '$table_name' is too long. The maximum is 30 characters.", E_USER_ERROR);
-		}
-
-		// Get type
-		list($column_type, $orig_column_type) = $this->get_column_type($column_data[0]);
-
-		// Adjust default value if db-dependent specified
-		if (is_array($column_data[1]))
-		{
-			$column_data[1] = (isset($column_data[1][$this->sql_layer])) ? $column_data[1][$this->sql_layer] : $column_data[1]['default'];
-		}
-
-		$sql = '';
-
-		$return_array = array();
-
-		switch ($this->sql_layer)
-		{
-			case 'mssql':
-			case 'mssqlnative':
-				$sql .= " {$column_type} ";
-				$sql_default = " {$column_type} ";
-
-				// For adding columns we need the default definition
-				if (!is_null($column_data[1]))
-				{
-					// For hexadecimal values do not use single quotes
-					if (strpos($column_data[1], '0x') === 0)
-					{
-						$return_array['default'] = 'DEFAULT (' . $column_data[1] . ') ';
-						$sql_default .= $return_array['default'];
-					}
-					else
-					{
-						$return_array['default'] = 'DEFAULT (' . ((is_numeric($column_data[1])) ? $column_data[1] : "'{$column_data[1]}'") . ') ';
-						$sql_default .= $return_array['default'];
-					}
-				}
-
-				if (isset($column_data[2]) && $column_data[2] == 'auto_increment')
-				{
-//					$sql .= 'IDENTITY (1, 1) ';
-					$sql_default .= 'IDENTITY (1, 1) ';
-				}
-
-				$return_array['textimage'] = $column_type === '[text]';
-
-				if (!is_null($column_data[1]) || (isset($column_data[2]) && $column_data[2] == 'auto_increment'))
-				{
-					$sql .= 'NOT NULL';
-					$sql_default .= 'NOT NULL';
-				}
-				else
-				{
-					$sql .= 'NULL';
-					$sql_default .= 'NULL';
-				}
-
-				$return_array['column_type_sql_default'] = $sql_default;
-
-			break;
-
-			case 'mysql_40':
-			case 'mysql_41':
-				$sql .= " {$column_type} ";
-
-				// For hexadecimal values do not use single quotes
-				if (!is_null($column_data[1]) && substr($column_type, -4) !== 'text' && substr($column_type, -4) !== 'blob')
-				{
-					$sql .= (strpos($column_data[1], '0x') === 0) ? "DEFAULT {$column_data[1]} " : "DEFAULT '{$column_data[1]}' ";
-				}
-
-				if (!is_null($column_data[1]) || (isset($column_data[2]) && $column_data[2] == 'auto_increment'))
-				{
-					$sql .= 'NOT NULL';
-				}
-				else
-				{
-					$sql .= 'NULL';
-				}
-
-				if (isset($column_data[2]))
-				{
-					if ($column_data[2] == 'auto_increment')
-					{
-						$sql .= ' auto_increment';
-					}
-					else if ($this->sql_layer === 'mysql_41' && $column_data[2] == 'true_sort')
-					{
-						$sql .= ' COLLATE utf8_unicode_ci';
-					}
-				}
-
-				if (isset($column_data['after']))
-				{
-					$return_array['after'] = $column_data['after'];
-				}
-
-			break;
-
-			case 'oracle':
-				$sql .= " {$column_type} ";
-				$sql .= (!is_null($column_data[1])) ? "DEFAULT '{$column_data[1]}' " : '';
-
-				// In Oracle empty strings ('') are treated as NULL.
-				// Therefore in oracle we allow NULL's for all DEFAULT '' entries
-				// Oracle does not like setting NOT NULL on a column that is already NOT NULL (this happens only on number fields)
-				if (!preg_match('/number/i', $column_type))
-				{
-					$sql .= ($column_data[1] === '' || $column_data[1] === null) ? '' : 'NOT NULL';
-				}
-
-				$return_array['auto_increment'] = false;
-				if (isset($column_data[2]) && $column_data[2] == 'auto_increment')
-				{
-					$return_array['auto_increment'] = true;
-				}
-
-			break;
-
-			case 'postgres':
-				$return_array['column_type'] = $column_type;
-
-				$sql .= " {$column_type} ";
-
-				$return_array['auto_increment'] = false;
-				if (isset($column_data[2]) && $column_data[2] == 'auto_increment')
-				{
-					$default_val = "nextval('{$table_name}_seq')";
-					$return_array['auto_increment'] = true;
-				}
-				else if (!is_null($column_data[1]))
-				{
-					$default_val = "'" . $column_data[1] . "'";
-					$return_array['null'] = 'NOT NULL';
-					$sql .= 'NOT NULL ';
-				}
-				else
-				{
-					// Integers need to have 0 instead of empty string as default
-					if (strpos($column_type, 'INT') === 0)
-					{
-						$default_val = '0';
-					}
-					else
-					{
-						$default_val = "'" . $column_data[1] . "'";
-					}
-					$return_array['null'] = 'NULL';
-					$sql .= 'NULL ';
-				}
-
-				$return_array['default'] = $default_val;
-
-				$sql .= "DEFAULT {$default_val}";
-
-				// Unsigned? Then add a CHECK contraint
-				if (in_array($orig_column_type, $this->unsigned_types))
-				{
-					$return_array['constraint'] = "CHECK ({$column_name} >= 0)";
-					$sql .= " CHECK ({$column_name} >= 0)";
-				}
-
-			break;
-
-			case 'sqlite':
-			case 'sqlite3':
-				$return_array['primary_key_set'] = false;
-				if (isset($column_data[2]) && $column_data[2] == 'auto_increment')
-				{
-					$sql .= ' INTEGER PRIMARY KEY';
-					$return_array['primary_key_set'] = true;
-
-					if ($this->sql_layer === 'sqlite3')
-					{
-						$sql .= ' AUTOINCREMENT';
-					}
-				}
-				else
-				{
-					$sql .= ' ' . $column_type;
-				}
-
-				if (!is_null($column_data[1]))
-				{
-					$sql .= ' NOT NULL ';
-					$sql .= "DEFAULT '{$column_data[1]}'";
-				}
-
-			break;
-		}
-
-		$return_array['column_type_sql'] = $sql;
-
-		return $return_array;
-	}
-
-	/**
-	* Get the column's database type from the type map
-	*
-	* @param string $column_map_type
-	* @return array		column type for this database
-	*					and map type without length
-	*/
-	function get_column_type($column_map_type)
-	{
-		if (strpos($column_map_type, ':') !== false)
-		{
-			list($orig_column_type, $column_length) = explode(':', $column_map_type);
-			if (!is_array($this->dbms_type_map[$this->sql_layer][$orig_column_type . ':']))
-			{
-				$column_type = sprintf($this->dbms_type_map[$this->sql_layer][$orig_column_type . ':'], $column_length);
-			}
-			else
-			{
-				if (isset($this->dbms_type_map[$this->sql_layer][$orig_column_type . ':']['rule']))
-				{
-					switch ($this->dbms_type_map[$this->sql_layer][$orig_column_type . ':']['rule'][0])
-					{
-						case 'div':
-							$column_length /= $this->dbms_type_map[$this->sql_layer][$orig_column_type . ':']['rule'][1];
-							$column_length = ceil($column_length);
-							$column_type = sprintf($this->dbms_type_map[$this->sql_layer][$orig_column_type . ':'][0], $column_length);
-						break;
-					}
-				}
-
-				if (isset($this->dbms_type_map[$this->sql_layer][$orig_column_type . ':']['limit']))
-				{
-					switch ($this->dbms_type_map[$this->sql_layer][$orig_column_type . ':']['limit'][0])
-					{
-						case 'mult':
-							$column_length *= $this->dbms_type_map[$this->sql_layer][$orig_column_type . ':']['limit'][1];
-							if ($column_length > $this->dbms_type_map[$this->sql_layer][$orig_column_type . ':']['limit'][2])
-							{
-								$column_type = $this->dbms_type_map[$this->sql_layer][$orig_column_type . ':']['limit'][3];
-							}
-							else
-							{
-								$column_type = sprintf($this->dbms_type_map[$this->sql_layer][$orig_column_type . ':'][0], $column_length);
-							}
-						break;
-					}
-				}
-			}
-			$orig_column_type .= ':';
-		}
-		else
-		{
-			$orig_column_type = $column_map_type;
-			$column_type = $this->dbms_type_map[$this->sql_layer][$column_map_type];
-		}
-
-		return array($column_type, $orig_column_type);
-	}
-
-	/**
-	* Add new column
-	*/
-	function sql_column_add($table_name, $column_name, $column_data, $inline = false)
-	{
-		$column_data = $this->sql_prepare_column_data($table_name, $column_name, $column_data);
-		$statements = array();
-
-		switch ($this->sql_layer)
-		{
-			case 'mssql':
-			case 'mssqlnative':
-				// Does not support AFTER, only through temporary table
-				$statements[] = 'ALTER TABLE [' . $table_name . '] ADD [' . $column_name . '] ' . $column_data['column_type_sql_default'];
-			break;
-
-			case 'mysql_40':
-			case 'mysql_41':
-				$after = (!empty($column_data['after'])) ? ' AFTER ' . $column_data['after'] : '';
-				$statements[] = 'ALTER TABLE `' . $table_name . '` ADD COLUMN `' . $column_name . '` ' . $column_data['column_type_sql'] . $after;
-			break;
-
-			case 'oracle':
-				// Does not support AFTER, only through temporary table
-				$statements[] = 'ALTER TABLE ' . $table_name . ' ADD ' . $column_name . ' ' . $column_data['column_type_sql'];
-			break;
-
-			case 'postgres':
-				// Does not support AFTER, only through temporary table
-				if (version_compare($this->db->sql_server_info(true), '8.0', '>='))
-				{
-					$statements[] = 'ALTER TABLE ' . $table_name . ' ADD COLUMN "' . $column_name . '" ' . $column_data['column_type_sql'];
-				}
-				else
-				{
-					// old versions cannot add columns with default and null information
-					$statements[] = 'ALTER TABLE ' . $table_name . ' ADD COLUMN "' . $column_name . '" ' . $column_data['column_type'] . ' ' . $column_data['constraint'];
-
-					if (isset($column_data['null']))
-					{
-						if ($column_data['null'] == 'NOT NULL')
-						{
-							$statements[] = 'ALTER TABLE ' . $table_name . ' ALTER COLUMN ' . $column_name . ' SET NOT NULL';
-						}
-					}
-
-					if (isset($column_data['default']))
-					{
-						$statements[] = 'ALTER TABLE ' . $table_name . ' ALTER COLUMN ' . $column_name . ' SET DEFAULT ' . $column_data['default'];
-					}
-				}
-
-			break;
-
-			case 'sqlite':
-				if ($inline && $this->return_statements)
-				{
-					return $column_name . ' ' . $column_data['column_type_sql'];
-				}
-
-				$recreate_queries = $this->sqlite_get_recreate_table_queries($table_name);
-				if (empty($recreate_queries))
-				{
-					break;
-				}
-
-				$statements[] = 'begin';
-
-				$sql_create_table = array_shift($recreate_queries);
-
-				// Create a backup table and populate it, destroy the existing one
-				$statements[] = preg_replace('#CREATE\s+TABLE\s+"?' . $table_name . '"?#i', 'CREATE TEMPORARY TABLE ' . $table_name . '_temp', $sql_create_table);
-				$statements[] = 'INSERT INTO ' . $table_name . '_temp SELECT * FROM ' . $table_name;
-				$statements[] = 'DROP TABLE ' . $table_name;
-
-				preg_match('#\((.*)\)#s', $sql_create_table, $matches);
-
-				$new_table_cols = trim($matches[1]);
-				$old_table_cols = preg_split('/,(?![\s\w]+\))/m', $new_table_cols);
-				$column_list = array();
-
-				foreach ($old_table_cols as $declaration)
-				{
-					$entities = preg_split('#\s+#', trim($declaration));
-					if ($entities[0] == 'PRIMARY')
-					{
-						continue;
-					}
-					$column_list[] = $entities[0];
-				}
-
-				$columns = implode(',', $column_list);
-
-				$new_table_cols = $column_name . ' ' . $column_data['column_type_sql'] . ',' . $new_table_cols;
-
-				// create a new table and fill it up. destroy the temp one
-				$statements[] = 'CREATE TABLE ' . $table_name . ' (' . $new_table_cols . ');';
-				$statements = array_merge($statements, $recreate_queries);
-
-				$statements[] = 'INSERT INTO ' . $table_name . ' (' . $columns . ') SELECT ' . $columns . ' FROM ' . $table_name . '_temp;';
-				$statements[] = 'DROP TABLE ' . $table_name . '_temp';
-
-				$statements[] = 'commit';
-			break;
-
-			case 'sqlite3':
-				if ($inline && $this->return_statements)
-				{
-					return $column_name . ' ' . $column_data['column_type_sql'];
-				}
-
-				$statements[] = 'ALTER TABLE ' . $table_name . ' ADD ' . $column_name . ' ' . $column_data['column_type_sql'];
-			break;
-		}
-
-		return $this->_sql_run_sql($statements);
-	}
-
-	/**
-	* Drop column
-	*/
-	function sql_column_remove($table_name, $column_name, $inline = false)
-	{
-		$statements = array();
-
-		switch ($this->sql_layer)
-		{
-			case 'mssql':
-			case 'mssqlnative':
-				// We need the data here
-				$old_return_statements = $this->return_statements;
-				$this->return_statements = true;
-
-				$indexes = $this->get_existing_indexes($table_name, $column_name);
-				$indexes = array_merge($indexes, $this->get_existing_indexes($table_name, $column_name, true));
-
-				// Drop any indexes
-				$recreate_indexes = array();
-				if (!empty($indexes))
-				{
-					foreach ($indexes as $index_name => $index_data)
-					{
-						$result = $this->sql_index_drop($table_name, $index_name);
-						$statements = array_merge($statements, $result);
-						if (sizeof($index_data) > 1)
-						{
-							// Remove this column from the index and recreate it
-							$recreate_indexes[$index_name] = array_diff($index_data, array($column_name));
-						}
-					}
-				}
-
-				// Drop default value constraint
-				$result = $this->mssql_get_drop_default_constraints_queries($table_name, $column_name);
-				$statements = array_merge($statements, $result);
-
-				// Remove the column
-				$statements[] = 'ALTER TABLE [' . $table_name . '] DROP COLUMN [' . $column_name . ']';
-
-				if (!empty($recreate_indexes))
-				{
-					// Recreate indexes after we removed the column
-					foreach ($recreate_indexes as $index_name => $index_data)
-					{
-						$result = $this->sql_create_index($table_name, $index_name, $index_data);
-						$statements = array_merge($statements, $result);
-					}
-				}
-
-				$this->return_statements = $old_return_statements;
-			break;
-
-			case 'mysql_40':
-			case 'mysql_41':
-				$statements[] = 'ALTER TABLE `' . $table_name . '` DROP COLUMN `' . $column_name . '`';
-			break;
-
-			case 'oracle':
-				$statements[] = 'ALTER TABLE ' . $table_name . ' DROP COLUMN ' . $column_name;
-			break;
-
-			case 'postgres':
-				$statements[] = 'ALTER TABLE ' . $table_name . ' DROP COLUMN "' . $column_name . '"';
-			break;
-
-			case 'sqlite':
-			case 'sqlite3':
-
-				if ($inline && $this->return_statements)
-				{
-					return $column_name;
-				}
-
-				$recreate_queries = $this->sqlite_get_recreate_table_queries($table_name, $column_name);
-				if (empty($recreate_queries))
-				{
-					break;
-				}
-
-				$statements[] = 'begin';
-
-				$sql_create_table = array_shift($recreate_queries);
-
-				// Create a backup table and populate it, destroy the existing one
-				$statements[] = preg_replace('#CREATE\s+TABLE\s+"?' . $table_name . '"?#i', 'CREATE TEMPORARY TABLE ' . $table_name . '_temp', $sql_create_table);
-				$statements[] = 'INSERT INTO ' . $table_name . '_temp SELECT * FROM ' . $table_name;
-				$statements[] = 'DROP TABLE ' . $table_name;
-
-				preg_match('#\((.*)\)#s', $sql_create_table, $matches);
-
-				$new_table_cols = trim($matches[1]);
-				$old_table_cols = preg_split('/,(?![\s\w]+\))/m', $new_table_cols);
-				$column_list = array();
-
-				foreach ($old_table_cols as $declaration)
-				{
-					$entities = preg_split('#\s+#', trim($declaration));
-					if ($entities[0] == 'PRIMARY' || $entities[0] === $column_name)
-					{
-						continue;
-					}
-					$column_list[] = $entities[0];
-				}
-
-				$columns = implode(',', $column_list);
-
-				$new_table_cols = trim(preg_replace('/' . $column_name . '\b[^,]+(?:,|$)/m', '', $new_table_cols));
-				if (substr($new_table_cols, -1) === ',')
-				{
-					// Remove the comma from the last entry again
-					$new_table_cols = substr($new_table_cols, 0, -1);
-				}
-
-				// create a new table and fill it up. destroy the temp one
-				$statements[] = 'CREATE TABLE ' . $table_name . ' (' . $new_table_cols . ');';
-				$statements = array_merge($statements, $recreate_queries);
-
-				$statements[] = 'INSERT INTO ' . $table_name . ' (' . $columns . ') SELECT ' . $columns . ' FROM ' . $table_name . '_temp;';
-				$statements[] = 'DROP TABLE ' . $table_name . '_temp';
-
-				$statements[] = 'commit';
-			break;
-		}
-
-		return $this->_sql_run_sql($statements);
-	}
-
-	/**
-	* Drop Index
-	*/
-	function sql_index_drop($table_name, $index_name)
-	{
-		$statements = array();
-
-		switch ($this->sql_layer)
-		{
-			case 'mssql':
-			case 'mssqlnative':
-				$statements[] = 'DROP INDEX ' . $table_name . '.' . $index_name;
-			break;
-
-			case 'mysql_40':
-			case 'mysql_41':
-				$statements[] = 'DROP INDEX ' . $index_name . ' ON ' . $table_name;
-			break;
-
-			case 'oracle':
-			case 'postgres':
-			case 'sqlite':
-			case 'sqlite3':
-				$statements[] = 'DROP INDEX ' . $table_name . '_' . $index_name;
-			break;
-		}
-
-		return $this->_sql_run_sql($statements);
-	}
-
-	/**
-	* Drop Table
-	*/
-	function sql_table_drop($table_name)
-	{
-		$statements = array();
-
-		if (!$this->sql_table_exists($table_name))
-		{
-			return $this->_sql_run_sql($statements);
-		}
-
-		// the most basic operation, get rid of the table
-		$statements[] = 'DROP TABLE ' . $table_name;
-
-		switch ($this->sql_layer)
-		{
-			case 'oracle':
-				$sql = 'SELECT A.REFERENCED_NAME
-					FROM USER_DEPENDENCIES A, USER_TRIGGERS B
-					WHERE A.REFERENCED_TYPE = \'SEQUENCE\'
-						AND A.NAME = B.TRIGGER_NAME
-						AND B.TABLE_NAME = \'' . strtoupper($table_name) . "'";
-				$result = $this->db->sql_query($sql);
-
-				// any sequences ref'd to this table's triggers?
-				while ($row = $this->db->sql_fetchrow($result))
-				{
-					$statements[] = "DROP SEQUENCE {$row['referenced_name']}";
-				}
-				$this->db->sql_freeresult($result);
-			break;
-
-			case 'postgres':
-				// PGSQL does not "tightly" bind sequences and tables, we must guess...
-				$sql = "SELECT relname
-					FROM pg_class
-					WHERE relkind = 'S'
-						AND relname = '{$table_name}_seq'";
-				$result = $this->db->sql_query($sql);
-
-				// We don't even care about storing the results. We already know the answer if we get rows back.
-				if ($this->db->sql_fetchrow($result))
-				{
-					$statements[] =  "DROP SEQUENCE {$table_name}_seq;\n";
-				}
-				$this->db->sql_freeresult($result);
-			break;
-		}
-
-		return $this->_sql_run_sql($statements);
-	}
-
-	/**
-	* Add primary key
-	*/
-	function sql_create_primary_key($table_name, $column, $inline = false)
-	{
-		$statements = array();
-
-		switch ($this->sql_layer)
-		{
-			case 'postgres':
-			case 'mysql_40':
-			case 'mysql_41':
-				$statements[] = 'ALTER TABLE ' . $table_name . ' ADD PRIMARY KEY (' . implode(', ', $column) . ')';
-			break;
-
-			case 'mssql':
-			case 'mssqlnative':
-				$sql = "ALTER TABLE [{$table_name}] WITH NOCHECK ADD ";
-				$sql .= "CONSTRAINT [PK_{$table_name}] PRIMARY KEY  CLUSTERED (";
-				$sql .= '[' . implode("],\n\t\t[", $column) . ']';
-				$sql .= ')';
-
-				$statements[] = $sql;
-			break;
-
-			case 'oracle':
-				$statements[] = 'ALTER TABLE ' . $table_name . ' add CONSTRAINT pk_' . $table_name . ' PRIMARY KEY (' . implode(', ', $column) . ')';
-			break;
-
-			case 'sqlite':
-			case 'sqlite3':
-
-				if ($inline && $this->return_statements)
-				{
-					return $column;
-				}
-
-				$recreate_queries = $this->sqlite_get_recreate_table_queries($table_name);
-				if (empty($recreate_queries))
-				{
-					break;
-				}
-
-				$statements[] = 'begin';
-
-				$sql_create_table = array_shift($recreate_queries);
-
-				// Create a backup table and populate it, destroy the existing one
-				$statements[] = preg_replace('#CREATE\s+TABLE\s+"?' . $table_name . '"?#i', 'CREATE TEMPORARY TABLE ' . $table_name . '_temp', $sql_create_table);
-				$statements[] = 'INSERT INTO ' . $table_name . '_temp SELECT * FROM ' . $table_name;
-				$statements[] = 'DROP TABLE ' . $table_name;
-
-				preg_match('#\((.*)\)#s', $sql_create_table, $matches);
-
-				$new_table_cols = trim($matches[1]);
-				$old_table_cols = preg_split('/,(?![\s\w]+\))/m', $new_table_cols);
-				$column_list = array();
-
-				foreach ($old_table_cols as $declaration)
-				{
-					$entities = preg_split('#\s+#', trim($declaration));
-					if ($entities[0] == 'PRIMARY')
-					{
-						continue;
-					}
-					$column_list[] = $entities[0];
-				}
-
-				$columns = implode(',', $column_list);
-
-				// create a new table and fill it up. destroy the temp one
-				$statements[] = 'CREATE TABLE ' . $table_name . ' (' . $new_table_cols . ', PRIMARY KEY (' . implode(', ', $column) . '));';
-				$statements = array_merge($statements, $recreate_queries);
-
-				$statements[] = 'INSERT INTO ' . $table_name . ' (' . $columns . ') SELECT ' . $columns . ' FROM ' . $table_name . '_temp;';
-				$statements[] = 'DROP TABLE ' . $table_name . '_temp';
-
-				$statements[] = 'commit';
-			break;
-		}
-
-		return $this->_sql_run_sql($statements);
-	}
-
-	/**
-	* Add unique index
-	*/
-	function sql_create_unique_index($table_name, $index_name, $column)
-	{
-		$statements = array();
-
-		$table_prefix = substr(CONFIG_TABLE, 0, -6); // strlen(config)
-		if (strlen($table_name . '_' . $index_name) - strlen($table_prefix) > 24)
-		{
-			$max_length = strlen($table_prefix) + 24;
-			trigger_error("Index name '{$table_name}_$index_name' on table '$table_name' is too long. The maximum is $max_length characters.", E_USER_ERROR);
-		}
-
-		switch ($this->sql_layer)
-		{
-			case 'postgres':
-			case 'oracle':
-			case 'sqlite':
-			case 'sqlite3':
-				$statements[] = 'CREATE UNIQUE INDEX ' . $table_name . '_' . $index_name . ' ON ' . $table_name . '(' . implode(', ', $column) . ')';
-			break;
-
-			case 'mysql_40':
-			case 'mysql_41':
-				$statements[] = 'ALTER TABLE ' . $table_name . ' ADD UNIQUE INDEX ' . $index_name . '(' . implode(', ', $column) . ')';
-			break;
-
-			case 'mssql':
-			case 'mssqlnative':
-				$statements[] = 'CREATE UNIQUE INDEX [' . $index_name . '] ON [' . $table_name . ']([' . implode('], [', $column) . '])';
-			break;
-		}
-
-		return $this->_sql_run_sql($statements);
-	}
-
-	/**
-	* Add index
-	*/
-	function sql_create_index($table_name, $index_name, $column)
-	{
-		$statements = array();
-
-		$table_prefix = substr(CONFIG_TABLE, 0, -6); // strlen(config)
-		if (strlen($table_name . $index_name) - strlen($table_prefix) > 24)
-		{
-			$max_length = strlen($table_prefix) + 24;
-			trigger_error("Index name '{$table_name}_$index_name' on table '$table_name' is too long. The maximum is $max_length characters.", E_USER_ERROR);
-		}
-
-		// remove index length unless MySQL4
-		if ('mysql_40' != $this->sql_layer)
-		{
-			$column = preg_replace('#:.*$#', '', $column);
-		}
-
-		switch ($this->sql_layer)
-		{
-			case 'postgres':
-			case 'oracle':
-			case 'sqlite':
-			case 'sqlite3':
-				$statements[] = 'CREATE INDEX ' . $table_name . '_' . $index_name . ' ON ' . $table_name . '(' . implode(', ', $column) . ')';
-			break;
-
-			case 'mysql_40':
-				// add index size to definition as required by MySQL4
-				foreach ($column as $i => $col)
-				{
-					if (false !== strpos($col, ':'))
-					{
-						list($col, $index_size) = explode(':', $col);
-						$column[$i] = "$col($index_size)";
-					}
-				}
-			// no break
-			case 'mysql_41':
-				$statements[] = 'ALTER TABLE ' . $table_name . ' ADD INDEX ' . $index_name . ' (' . implode(', ', $column) . ')';
-			break;
-
-			case 'mssql':
-			case 'mssqlnative':
-				$statements[] = 'CREATE INDEX [' . $index_name . '] ON [' . $table_name . ']([' . implode('], [', $column) . '])';
-			break;
-		}
-
-		return $this->_sql_run_sql($statements);
-	}
-
-	/**
-	* List all of the indices that belong to a table,
-	* does not count:
-	* * UNIQUE indices
-	* * PRIMARY keys
-	*/
-	function sql_list_index($table_name)
-	{
-		$index_array = array();
-
-		if ($this->sql_layer == 'mssql' || $this->sql_layer == 'mssqlnative')
-		{
-			$sql = "EXEC sp_statistics '$table_name'";
-			$result = $this->db->sql_query($sql);
-			while ($row = $this->db->sql_fetchrow($result))
-			{
-				if ($row['TYPE'] == 3)
-				{
-					$index_array[] = $row['INDEX_NAME'];
-				}
-			}
-			$this->db->sql_freeresult($result);
-		}
-		else
-		{
-			switch ($this->sql_layer)
-			{
-				case 'postgres':
-					$sql = "SELECT ic.relname as index_name
-						FROM pg_class bc, pg_class ic, pg_index i
-						WHERE (bc.oid = i.indrelid)
-							AND (ic.oid = i.indexrelid)
-							AND (bc.relname = '" . $table_name . "')
-							AND (i.indisunique != 't')
-							AND (i.indisprimary != 't')";
-					$col = 'index_name';
-				break;
-
-				case 'mysql_40':
-				case 'mysql_41':
-					$sql = 'SHOW KEYS
-						FROM ' . $table_name;
-					$col = 'Key_name';
-				break;
-
-				case 'oracle':
-					$sql = "SELECT index_name
-						FROM user_indexes
-						WHERE table_name = '" . strtoupper($table_name) . "'
-							AND generated = 'N'
-							AND uniqueness = 'NONUNIQUE'";
-					$col = 'index_name';
-				break;
-
-				case 'sqlite':
-				case 'sqlite3':
-					$sql = "PRAGMA index_info('" . $table_name . "');";
-					$col = 'name';
-				break;
-			}
-
-			$result = $this->db->sql_query($sql);
-			while ($row = $this->db->sql_fetchrow($result))
-			{
-				if (($this->sql_layer == 'mysql_40' || $this->sql_layer == 'mysql_41') && !$row['Non_unique'])
-				{
-					continue;
-				}
-
-				switch ($this->sql_layer)
-				{
-					case 'oracle':
-					case 'postgres':
-					case 'sqlite':
-					case 'sqlite3':
-						$row[$col] = substr($row[$col], strlen($table_name) + 1);
-					break;
-				}
-
-				$index_array[] = $row[$col];
-			}
-			$this->db->sql_freeresult($result);
-		}
-
-		return array_map('strtolower', $index_array);
-	}
-
-	/**
-	 * Removes table_name from the index_name if it is at the beginning
-	 *
-	 * @param $table_name
-	 * @param $index_name
-	 * @return string
-	 */
-	protected function strip_table_name_from_index_name($table_name, $index_name)
-	{
-		return (strpos(strtoupper($index_name), strtoupper($table_name)) === 0) ? substr($index_name, strlen($table_name) + 1) : $index_name;
-	}
-
-	/**
-	* Change column type (not name!)
-	*/
-	function sql_column_change($table_name, $column_name, $column_data, $inline = false)
-	{
-		$original_column_data = $column_data;
-		$column_data = $this->sql_prepare_column_data($table_name, $column_name, $column_data);
-		$statements = array();
-
-		switch ($this->sql_layer)
-		{
-			case 'mssql':
-			case 'mssqlnative':
-				// We need the data here
-				$old_return_statements = $this->return_statements;
-				$this->return_statements = true;
-
-				$indexes = $this->get_existing_indexes($table_name, $column_name);
-				$unique_indexes = $this->get_existing_indexes($table_name, $column_name, true);
-
-				// Drop any indexes
-				if (!empty($indexes) || !empty($unique_indexes))
-				{
-					$drop_indexes = array_merge(array_keys($indexes), array_keys($unique_indexes));
-					foreach ($drop_indexes as $index_name)
-					{
-						$result = $this->sql_index_drop($table_name, $index_name);
-						$statements = array_merge($statements, $result);
-					}
-				}
-
-				// Drop default value constraint
-				$result = $this->mssql_get_drop_default_constraints_queries($table_name, $column_name);
-				$statements = array_merge($statements, $result);
-
-				// Change the column
-				$statements[] = 'ALTER TABLE [' . $table_name . '] ALTER COLUMN [' . $column_name . '] ' . $column_data['column_type_sql'];
-
-				if (!empty($column_data['default']))
-				{
-					// Add new default value constraint
-					$statements[] = 'ALTER TABLE [' . $table_name . '] ADD CONSTRAINT [DF_' . $table_name . '_' . $column_name . '_1] ' . $column_data['default'] . ' FOR [' . $column_name . ']';
-				}
-
-				if (!empty($indexes))
-				{
-					// Recreate indexes after we changed the column
-					foreach ($indexes as $index_name => $index_data)
-					{
-						$result = $this->sql_create_index($table_name, $index_name, $index_data);
-						$statements = array_merge($statements, $result);
-					}
-				}
-
-				if (!empty($unique_indexes))
-				{
-					// Recreate unique indexes after we changed the column
-					foreach ($unique_indexes as $index_name => $index_data)
-					{
-						$result = $this->sql_create_unique_index($table_name, $index_name, $index_data);
-						$statements = array_merge($statements, $result);
-					}
-				}
-
-				$this->return_statements = $old_return_statements;
-			break;
-
-			case 'mysql_40':
-			case 'mysql_41':
-				$statements[] = 'ALTER TABLE `' . $table_name . '` CHANGE `' . $column_name . '` `' . $column_name . '` ' . $column_data['column_type_sql'];
-			break;
-
-			case 'oracle':
-				// We need the data here
-				$old_return_statements = $this->return_statements;
-				$this->return_statements = true;
-
-				// Get list of existing indexes
-				$indexes = $this->get_existing_indexes($table_name, $column_name);
-				$unique_indexes = $this->get_existing_indexes($table_name, $column_name, true);
-
-				// Drop any indexes
-				if (!empty($indexes) || !empty($unique_indexes))
-				{
-					$drop_indexes = array_merge(array_keys($indexes), array_keys($unique_indexes));
-					foreach ($drop_indexes as $index_name)
-					{
-						$result = $this->sql_index_drop($table_name, $this->strip_table_name_from_index_name($table_name, $index_name));
-						$statements = array_merge($statements, $result);
-					}
-				}
-
-				$temp_column_name = 'temp_' . substr(md5($column_name), 0, 25);
-				// Add a temporary table with the new type
-				$result = $this->sql_column_add($table_name, $temp_column_name, $original_column_data);
-				$statements = array_merge($statements, $result);
-
-				// Copy the data to the new column
-				$statements[] = 'UPDATE ' . $table_name . ' SET ' . $temp_column_name . ' = ' . $column_name;
-
-				// Drop the original column
-				$result = $this->sql_column_remove($table_name, $column_name);
-				$statements = array_merge($statements, $result);
-
-				// Recreate the original column with the new type
-				$result = $this->sql_column_add($table_name, $column_name, $original_column_data);
-				$statements = array_merge($statements, $result);
-
-				if (!empty($indexes))
-				{
-					// Recreate indexes after we changed the column
-					foreach ($indexes as $index_name => $index_data)
-					{
-						$result = $this->sql_create_index($table_name, $this->strip_table_name_from_index_name($table_name, $index_name), $index_data);
-						$statements = array_merge($statements, $result);
-					}
-				}
-
-				if (!empty($unique_indexes))
-				{
-					// Recreate unique indexes after we changed the column
-					foreach ($unique_indexes as $index_name => $index_data)
-					{
-						$result = $this->sql_create_unique_index($table_name, $this->strip_table_name_from_index_name($table_name, $index_name), $index_data);
-						$statements = array_merge($statements, $result);
-					}
-				}
-
-				// Copy the data to the original column
-				$statements[] = 'UPDATE ' . $table_name . ' SET ' . $column_name . ' = ' . $temp_column_name;
-
-				// Drop the temporary column again
-				$result = $this->sql_column_remove($table_name, $temp_column_name);
-				$statements = array_merge($statements, $result);
-
-				$this->return_statements = $old_return_statements;
-			break;
-
-			case 'postgres':
-				$sql = 'ALTER TABLE ' . $table_name . ' ';
-
-				$sql_array = array();
-				$sql_array[] = 'ALTER COLUMN ' . $column_name . ' TYPE ' . $column_data['column_type'];
-
-				if (isset($column_data['null']))
-				{
-					if ($column_data['null'] == 'NOT NULL')
-					{
-						$sql_array[] = 'ALTER COLUMN ' . $column_name . ' SET NOT NULL';
-					}
-					else if ($column_data['null'] == 'NULL')
-					{
-						$sql_array[] = 'ALTER COLUMN ' . $column_name . ' DROP NOT NULL';
-					}
-				}
-
-				if (isset($column_data['default']))
-				{
-					$sql_array[] = 'ALTER COLUMN ' . $column_name . ' SET DEFAULT ' . $column_data['default'];
-				}
-
-				// we don't want to double up on constraints if we change different number data types
-				if (isset($column_data['constraint']))
-				{
-					$constraint_sql = "SELECT consrc as constraint_data
-								FROM pg_constraint, pg_class bc
-								WHERE conrelid = bc.oid
-									AND bc.relname = '{$table_name}'
-									AND NOT EXISTS (
-										SELECT *
-											FROM pg_constraint as c, pg_inherits as i
-											WHERE i.inhrelid = pg_constraint.conrelid
-												AND c.conname = pg_constraint.conname
-												AND c.consrc = pg_constraint.consrc
-												AND c.conrelid = i.inhparent
-									)";
-
-					$constraint_exists = false;
-
-					$result = $this->db->sql_query($constraint_sql);
-					while ($row = $this->db->sql_fetchrow($result))
-					{
-						if (trim($row['constraint_data']) == trim($column_data['constraint']))
-						{
-							$constraint_exists = true;
-							break;
-						}
-					}
-					$this->db->sql_freeresult($result);
-
-					if (!$constraint_exists)
-					{
-						$sql_array[] = 'ADD ' . $column_data['constraint'];
-					}
-				}
-
-				$sql .= implode(', ', $sql_array);
-
-				$statements[] = $sql;
-			break;
-
-			case 'sqlite':
-			case 'sqlite3':
-
-				if ($inline && $this->return_statements)
-				{
-					return $column_name . ' ' . $column_data['column_type_sql'];
-				}
-
-				$recreate_queries = $this->sqlite_get_recreate_table_queries($table_name);
-				if (empty($recreate_queries))
-				{
-					break;
-				}
-
-				$statements[] = 'begin';
-
-				$sql_create_table = array_shift($recreate_queries);
-
-				// Create a temp table and populate it, destroy the existing one
-				$statements[] = preg_replace('#CREATE\s+TABLE\s+"?' . $table_name . '"?#i', 'CREATE TEMPORARY TABLE ' . $table_name . '_temp', $sql_create_table);
-				$statements[] = 'INSERT INTO ' . $table_name . '_temp SELECT * FROM ' . $table_name;
-				$statements[] = 'DROP TABLE ' . $table_name;
-
-				preg_match('#\((.*)\)#s', $sql_create_table, $matches);
-
-				$new_table_cols = trim($matches[1]);
-				$old_table_cols = preg_split('/,(?![\s\w]+\))/m', $new_table_cols);
-				$column_list = array();
-
-				foreach ($old_table_cols as $key => $declaration)
-				{
-					$declaration = trim($declaration);
-
-					// Check for the beginning of the constraint section and stop
-					if (preg_match('/[^\(]*\s*PRIMARY KEY\s+\(/', $declaration) ||
-						preg_match('/[^\(]*\s*UNIQUE\s+\(/', $declaration) ||
-						preg_match('/[^\(]*\s*FOREIGN KEY\s+\(/', $declaration) ||
-						preg_match('/[^\(]*\s*CHECK\s+\(/', $declaration))
-					{
-						break;
-					}
-
-					$entities = preg_split('#\s+#', $declaration);
-					$column_list[] = $entities[0];
-					if ($entities[0] == $column_name)
-					{
-						$old_table_cols[$key] = $column_name . ' ' . $column_data['column_type_sql'];
-					}
-				}
-
-				$columns = implode(',', $column_list);
-
-				// Create a new table and fill it up. destroy the temp one
-				$statements[] = 'CREATE TABLE ' . $table_name . ' (' . implode(',', $old_table_cols) . ');';
-				$statements = array_merge($statements, $recreate_queries);
-
-				$statements[] = 'INSERT INTO ' . $table_name . ' (' . $columns . ') SELECT ' . $columns . ' FROM ' . $table_name . '_temp;';
-				$statements[] = 'DROP TABLE ' . $table_name . '_temp';
-
-				$statements[] = 'commit';
-
-			break;
-		}
-
-		return $this->_sql_run_sql($statements);
-	}
-
-	/**
-	* Get queries to drop the default constraints of a column
-	*
-	* We need to drop the default constraints of a column,
-	* before being able to change their type or deleting them.
-	*
-	* @param string $table_name
-	* @param string $column_name
-	* @return array		Array with SQL statements
-	*/
-	protected function mssql_get_drop_default_constraints_queries($table_name, $column_name)
-	{
-		$statements = array();
-		if ($this->mssql_is_sql_server_2000())
-		{
-			// http://msdn.microsoft.com/en-us/library/aa175912%28v=sql.80%29.aspx
-			// Deprecated in SQL Server 2005
-			$sql = "SELECT so.name AS def_name
-				FROM sysobjects so
-				JOIN sysconstraints sc ON so.id = sc.constid
-				WHERE object_name(so.parent_obj) = '{$table_name}'
-					AND so.xtype = 'D'
-					AND sc.colid = (SELECT colid FROM syscolumns
-						WHERE id = object_id('{$table_name}')
-							AND name = '{$column_name}')";
-		}
-		else
-		{
-			$sql = "SELECT dobj.name AS def_name
-				FROM sys.columns col
-					LEFT OUTER JOIN sys.objects dobj ON (dobj.object_id = col.default_object_id AND dobj.type = 'D')
-				WHERE col.object_id = object_id('{$table_name}')
-					AND col.name = '{$column_name}'
-					AND dobj.name IS NOT NULL";
-		}
-
-		$result = $this->db->sql_query($sql);
-		while ($row = $this->db->sql_fetchrow($result))
-		{
-			$statements[] = 'ALTER TABLE [' . $table_name . '] DROP CONSTRAINT [' . $row['def_name'] . ']';
-		}
-		$this->db->sql_freeresult($result);
-
-		return $statements;
-	}
-
-	/**
-	* Get a list with existing indexes for the column
-	*
-	* @param string $table_name
-	* @param string $column_name
-	* @param bool $unique Should we get unique indexes or normal ones
-	* @return array		Array with Index name => columns
-	*/
-	public function get_existing_indexes($table_name, $column_name, $unique = false)
-	{
-		switch ($this->sql_layer)
-		{
-			case 'mysql_40':
-			case 'mysql_41':
-			case 'postgres':
-			case 'sqlite':
-			case 'sqlite3':
-				// Not supported
-				throw new \Exception('DBMS is not supported');
-			break;
-		}
-
-		$sql = '';
-		$existing_indexes = array();
-
-		switch ($this->sql_layer)
-		{
-			case 'mssql':
-			case 'mssqlnative':
-				if ($this->mssql_is_sql_server_2000())
-				{
-					// http://msdn.microsoft.com/en-us/library/aa175912%28v=sql.80%29.aspx
-					// Deprecated in SQL Server 2005
-					$sql = "SELECT DISTINCT ix.name AS phpbb_index_name
-					FROM sysindexes ix
-					INNER JOIN sysindexkeys ixc
-						ON ixc.id = ix.id
-							AND ixc.indid = ix.indid
-					INNER JOIN syscolumns cols
-						ON cols.colid = ixc.colid
-							AND cols.id = ix.id
-					WHERE ix.id = object_id('{$table_name}')
-						AND cols.name = '{$column_name}'
-						AND INDEXPROPERTY(ix.id, ix.name, 'IsUnique') = " . ($unique ? '1' : '0');
-				}
-				else
-				{
-					$sql = "SELECT DISTINCT ix.name AS phpbb_index_name
-					FROM sys.indexes ix
-					INNER JOIN sys.index_columns ixc
-						ON ixc.object_id = ix.object_id
-							AND ixc.index_id = ix.index_id
-					INNER JOIN sys.columns cols
-						ON cols.column_id = ixc.column_id
-							AND cols.object_id = ix.object_id
-					WHERE ix.object_id = object_id('{$table_name}')
-						AND cols.name = '{$column_name}'
-						AND ix.is_unique = " . ($unique ? '1' : '0');
-				}
-			break;
-
-			case 'oracle':
-				$sql = "SELECT ix.index_name  AS phpbb_index_name, ix.uniqueness AS is_unique
-					FROM all_ind_columns ixc, all_indexes ix
-					WHERE ix.index_name = ixc.index_name
-						AND ixc.table_name = '" . strtoupper($table_name) . "'
-						AND ixc.column_name = '" . strtoupper($column_name) . "'";
-			break;
-		}
-
-		$result = $this->db->sql_query($sql);
-		while ($row = $this->db->sql_fetchrow($result))
-		{
-			if (!isset($row['is_unique']) || ($unique && $row['is_unique'] == 'UNIQUE') || (!$unique && $row['is_unique'] == 'NONUNIQUE'))
-			{
-				$existing_indexes[$row['phpbb_index_name']] = array();
-			}
-		}
-		$this->db->sql_freeresult($result);
-
-		if (empty($existing_indexes))
-		{
-			return array();
-		}
-
-		switch ($this->sql_layer)
-		{
-			case 'mssql':
-			case 'mssqlnative':
-				if ($this->mssql_is_sql_server_2000())
-				{
-					$sql = "SELECT DISTINCT ix.name AS phpbb_index_name, cols.name AS phpbb_column_name
-						FROM sysindexes ix
-						INNER JOIN sysindexkeys ixc
-							ON ixc.id = ix.id
-								AND ixc.indid = ix.indid
-						INNER JOIN syscolumns cols
-							ON cols.colid = ixc.colid
-								AND cols.id = ix.id
-						WHERE ix.id = object_id('{$table_name}')
-							AND " . $this->db->sql_in_set('ix.name', array_keys($existing_indexes));
-				}
-				else
-				{
-					$sql = "SELECT DISTINCT ix.name AS phpbb_index_name, cols.name AS phpbb_column_name
-						FROM sys.indexes ix
-						INNER JOIN sys.index_columns ixc
-							ON ixc.object_id = ix.object_id
-								AND ixc.index_id = ix.index_id
-						INNER JOIN sys.columns cols
-							ON cols.column_id = ixc.column_id
-								AND cols.object_id = ix.object_id
-						WHERE ix.object_id = object_id('{$table_name}')
-							AND " . $this->db->sql_in_set('ix.name', array_keys($existing_indexes));
-				}
-			break;
-
-			case 'oracle':
-				$sql = "SELECT index_name AS phpbb_index_name, column_name AS phpbb_column_name
-					FROM all_ind_columns
-					WHERE table_name = '" . strtoupper($table_name) . "'
-						AND " . $this->db->sql_in_set('index_name', array_keys($existing_indexes));
-			break;
-		}
-
-		$result = $this->db->sql_query($sql);
-		while ($row = $this->db->sql_fetchrow($result))
-		{
-			$existing_indexes[$row['phpbb_index_name']][] = $row['phpbb_column_name'];
-		}
-		$this->db->sql_freeresult($result);
-
-		return $existing_indexes;
-	}
-
-	/**
-	* Is the used MS SQL Server a SQL Server 2000?
-	*
-	* @return bool
-	*/
-	protected function mssql_is_sql_server_2000()
-	{
-		if ($this->is_sql_server_2000 === null)
-		{
-			$sql = "SELECT CAST(SERVERPROPERTY('productversion') AS VARCHAR(25)) AS mssql_version";
-			$result = $this->db->sql_query($sql);
-			$properties = $this->db->sql_fetchrow($result);
-			$this->db->sql_freeresult($result);
-			$this->is_sql_server_2000 = $properties['mssql_version'][0] == '8';
-		}
-
-		return $this->is_sql_server_2000;
-	}
-
-	/**
-	* Returns the Queries which are required to recreate a table including indexes
-	*
-	* @param string $table_name
-	* @param string $remove_column	When we drop a column, we remove the column
-	*								from all indexes. If the index has no other
-	*								column, we drop it completly.
-	* @return array
-	*/
-	protected function sqlite_get_recreate_table_queries($table_name, $remove_column = '')
-	{
-		$queries = array();
-
-		$sql = "SELECT sql
-			FROM sqlite_master
-			WHERE type = 'table'
-				AND name = '{$table_name}'";
-		$result = $this->db->sql_query($sql);
-		$sql_create_table = $this->db->sql_fetchfield('sql');
-		$this->db->sql_freeresult($result);
-
-		if (!$sql_create_table)
-		{
-			return array();
-		}
-		$queries[] = $sql_create_table;
-
-		$sql = "SELECT sql
-			FROM sqlite_master
-			WHERE type = 'index'
-				AND tbl_name = '{$table_name}'";
-		$result = $this->db->sql_query($sql);
-		while ($sql_create_index = $this->db->sql_fetchfield('sql'))
-		{
-			if ($remove_column)
-			{
-				$match = array();
-				preg_match('#(?:[\w ]+)\((.*)\)#', $sql_create_index, $match);
-				if (!isset($match[1]))
-				{
-					continue;
-				}
-
-				// Find and remove $remove_column from the index
-				$columns = explode(', ', $match[1]);
-				$found_column = array_search($remove_column, $columns);
-				if ($found_column !== false)
-				{
-					unset($columns[$found_column]);
-
-					// If the column list is not empty add the index to the list
-					if (!empty($columns))
-					{
-						$queries[] = str_replace($match[1], implode(', ', $columns), $sql_create_index);
-					}
-				}
-				else
-				{
-					$queries[] = $sql_create_index;
-				}
-			}
-			else
-			{
-				$queries[] = $sql_create_index;
-			}
-		}
-		$this->db->sql_freeresult($result);
-
-		return $queries;
-	}
 }
diff --git a/phpBB/phpbb/db/tools/factory.php b/phpBB/phpbb/db/tools/factory.php
new file mode 100644
index 0000000000..96471c3408
--- /dev/null
+++ b/phpBB/phpbb/db/tools/factory.php
@@ -0,0 +1,43 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\tools;
+
+/**
+ * A factory which serves the suitable tools instance for the given dbal
+ */
+class factory
+{
+	/**
+	 * @param mixed $db_driver
+	 * @param bool $return_statements
+	 * @return \phpbb\db\tools\tools_interface
+	 */
+	public function get($db_driver, $return_statements = false)
+	{
+		if ($db_driver instanceof \phpbb\db\driver\mssql_base)
+		{
+			return new \phpbb\db\tools\mssql($db_driver, $return_statements);
+		}
+		else if ($db_driver instanceof \phpbb\db\driver\postgres)
+		{
+			return new \phpbb\db\tools\postgres($db_driver, $return_statements);
+		}
+		else if ($db_driver instanceof \phpbb\db\driver\driver_interface)
+		{
+			return new \phpbb\db\tools\tools($db_driver, $return_statements);
+		}
+
+		throw new \InvalidArgumentException('Invalid database driver given');
+	}
+}
diff --git a/phpBB/phpbb/db/tools/mssql.php b/phpBB/phpbb/db/tools/mssql.php
new file mode 100644
index 0000000000..cbedf9a5c4
--- /dev/null
+++ b/phpBB/phpbb/db/tools/mssql.php
@@ -0,0 +1,880 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\db\tools;
+
+/**
+ * Database Tools for handling cross-db actions such as altering columns, etc.
+ * Currently not supported is returning SQL for creating tables.
+ */
+class mssql extends tools
+{
+	/**
+	 * Is the used MS SQL Server a SQL Server 2000?
+	 * @var bool
+	 */
+	protected $is_sql_server_2000;
+
+	/**
+	 * Get the column types for mssql based databases
+	 *
+	 * @return array
+	 */
+	public static function get_dbms_type_map()
+	{
+		return array(
+			'mssql'		=> array(
+				'INT:'		=> '[int]',
+				'BINT'		=> '[float]',
+				'ULINT'		=> '[int]',
+				'UINT'		=> '[int]',
+				'UINT:'		=> '[int]',
+				'TINT:'		=> '[int]',
+				'USINT'		=> '[int]',
+				'BOOL'		=> '[int]',
+				'VCHAR'		=> '[varchar] (255)',
+				'VCHAR:'	=> '[varchar] (%d)',
+				'CHAR:'		=> '[char] (%d)',
+				'XSTEXT'	=> '[varchar] (1000)',
+				'STEXT'		=> '[varchar] (3000)',
+				'TEXT'		=> '[varchar] (8000)',
+				'MTEXT'		=> '[text]',
+				'XSTEXT_UNI'=> '[nvarchar] (100)',
+				'STEXT_UNI'	=> '[nvarchar] (255)',
+				'TEXT_UNI'	=> '[nvarchar] (4000)',
+				'MTEXT_UNI'	=> '[ntext]',
+				'TIMESTAMP'	=> '[int]',
+				'DECIMAL'	=> '[float]',
+				'DECIMAL:'	=> '[float]',
+				'PDECIMAL'	=> '[float]',
+				'PDECIMAL:'	=> '[float]',
+				'VCHAR_UNI'	=> '[nvarchar] (255)',
+				'VCHAR_UNI:'=> '[nvarchar] (%d)',
+				'VCHAR_CI'	=> '[nvarchar] (255)',
+				'VARBINARY'	=> '[varchar] (255)',
+			),
+
+			'mssqlnative'	=> array(
+				'INT:'		=> '[int]',
+				'BINT'		=> '[float]',
+				'ULINT'		=> '[int]',
+				'UINT'		=> '[int]',
+				'UINT:'		=> '[int]',
+				'TINT:'		=> '[int]',
+				'USINT'		=> '[int]',
+				'BOOL'		=> '[int]',
+				'VCHAR'		=> '[varchar] (255)',
+				'VCHAR:'	=> '[varchar] (%d)',
+				'CHAR:'		=> '[char] (%d)',
+				'XSTEXT'	=> '[varchar] (1000)',
+				'STEXT'		=> '[varchar] (3000)',
+				'TEXT'		=> '[varchar] (8000)',
+				'MTEXT'		=> '[text]',
+				'XSTEXT_UNI'=> '[nvarchar] (100)',
+				'STEXT_UNI'	=> '[nvarchar] (255)',
+				'TEXT_UNI'	=> '[nvarchar] (4000)',
+				'MTEXT_UNI'	=> '[ntext]',
+				'TIMESTAMP'	=> '[int]',
+				'DECIMAL'	=> '[float]',
+				'DECIMAL:'	=> '[float]',
+				'PDECIMAL'	=> '[float]',
+				'PDECIMAL:'	=> '[float]',
+				'VCHAR_UNI'	=> '[nvarchar] (255)',
+				'VCHAR_UNI:'=> '[nvarchar] (%d)',
+				'VCHAR_CI'	=> '[nvarchar] (255)',
+				'VARBINARY'	=> '[varchar] (255)',
+			),
+		);
+	}
+
+	/**
+	* Constructor. Set DB Object and set {@link $return_statements return_statements}.
+	*
+	* @param \phpbb\db\driver\driver_interface	$db					Database connection
+	* @param bool		$return_statements	True if only statements should be returned and no SQL being executed
+	*/
+	public function __construct(\phpbb\db\driver\driver_interface $db, $return_statements = false)
+	{
+		parent::__construct($db, $return_statements);
+
+		// Determine mapping database type
+		switch ($this->db->get_sql_layer())
+		{
+			case 'mssql_odbc':
+				$this->sql_layer = 'mssql';
+			break;
+
+			case 'mssqlnative':
+				$this->sql_layer = 'mssqlnative';
+			break;
+		}
+
+		$this->dbms_type_map = self::get_dbms_type_map();
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	function sql_list_tables()
+	{
+		$sql = "SELECT name
+			FROM sysobjects
+			WHERE type='U'";
+		$result = $this->db->sql_query($sql);
+
+		$tables = array();
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			$name = current($row);
+			$tables[$name] = $name;
+		}
+		$this->db->sql_freeresult($result);
+
+		return $tables;
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	function sql_create_table($table_name, $table_data)
+	{
+		// holds the DDL for a column
+		$columns = $statements = array();
+
+		if ($this->sql_table_exists($table_name))
+		{
+			return $this->_sql_run_sql($statements);
+		}
+
+		// Begin transaction
+		$statements[] = 'begin';
+
+		// Determine if we have created a PRIMARY KEY in the earliest
+		$primary_key_gen = false;
+
+		// Determine if the table requires a sequence
+		$create_sequence = false;
+
+		// Begin table sql statement
+		$table_sql = 'CREATE TABLE [' . $table_name . '] (' . "\n";
+
+		if (!isset($table_data['PRIMARY_KEY']))
+		{
+			$table_data['COLUMNS']['mssqlindex'] = array('UINT', null, 'auto_increment');
+			$table_data['PRIMARY_KEY'] = 'mssqlindex';
+		}
+
+		// Iterate through the columns to create a table
+		foreach ($table_data['COLUMNS'] as $column_name => $column_data)
+		{
+			// here lies an array, filled with information compiled on the column's data
+			$prepared_column = $this->sql_prepare_column_data($table_name, $column_name, $column_data);
+
+			if (isset($prepared_column['auto_increment']) && $prepared_column['auto_increment'] && strlen($column_name) > 26) // "${column_name}_gen"
+			{
+				trigger_error("Index name '${column_name}_gen' on table '$table_name' is too long. The maximum auto increment column length is 26 characters.", E_USER_ERROR);
+			}
+
+			// here we add the definition of the new column to the list of columns
+			$columns[] = "\t [{$column_name}] " . $prepared_column['column_type_sql_default'];
+
+			// see if we have found a primary key set due to a column definition if we have found it, we can stop looking
+			if (!$primary_key_gen)
+			{
+				$primary_key_gen = isset($prepared_column['primary_key_set']) && $prepared_column['primary_key_set'];
+			}
+
+			// create sequence DDL based off of the existance of auto incrementing columns
+			if (!$create_sequence && isset($prepared_column['auto_increment']) && $prepared_column['auto_increment'])
+			{
+				$create_sequence = $column_name;
+			}
+		}
+
+		// this makes up all the columns in the create table statement
+		$table_sql .= implode(",\n", $columns);
+
+		// Close the table for two DBMS and add to the statements
+		$table_sql .= "\n);";
+		$statements[] = $table_sql;
+
+		// we have yet to create a primary key for this table,
+		// this means that we can add the one we really wanted instead
+		if (!$primary_key_gen)
+		{
+			// Write primary key
+			if (isset($table_data['PRIMARY_KEY']))
+			{
+				if (!is_array($table_data['PRIMARY_KEY']))
+				{
+					$table_data['PRIMARY_KEY'] = array($table_data['PRIMARY_KEY']);
+				}
+
+				// We need the data here
+				$old_return_statements = $this->return_statements;
+				$this->return_statements = true;
+
+				$primary_key_stmts = $this->sql_create_primary_key($table_name, $table_data['PRIMARY_KEY']);
+				foreach ($primary_key_stmts as $pk_stmt)
+				{
+					$statements[] = $pk_stmt;
+				}
+
+				$this->return_statements = $old_return_statements;
+			}
+		}
+
+		// Write Keys
+		if (isset($table_data['KEYS']))
+		{
+			foreach ($table_data['KEYS'] as $key_name => $key_data)
+			{
+				if (!is_array($key_data[1]))
+				{
+					$key_data[1] = array($key_data[1]);
+				}
+
+				$old_return_statements = $this->return_statements;
+				$this->return_statements = true;
+
+				$key_stmts = ($key_data[0] == 'UNIQUE') ? $this->sql_create_unique_index($table_name, $key_name, $key_data[1]) : $this->sql_create_index($table_name, $key_name, $key_data[1]);
+
+				foreach ($key_stmts as $key_stmt)
+				{
+					$statements[] = $key_stmt;
+				}
+
+				$this->return_statements = $old_return_statements;
+			}
+		}
+
+		// Commit Transaction
+		$statements[] = 'commit';
+
+		return $this->_sql_run_sql($statements);
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	function sql_list_columns($table_name)
+	{
+		$columns = array();
+
+		$sql = "SELECT c.name
+			FROM syscolumns c
+			LEFT JOIN sysobjects o ON c.id = o.id
+			WHERE o.name = '{$table_name}'";
+		$result = $this->db->sql_query($sql);
+
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			$column = strtolower(current($row));
+			$columns[$column] = $column;
+		}
+		$this->db->sql_freeresult($result);
+
+		return $columns;
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	function sql_index_exists($table_name, $index_name)
+	{
+		$sql = "EXEC sp_statistics '$table_name'";
+		$result = $this->db->sql_query($sql);
+
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			if ($row['TYPE'] == 3)
+			{
+				if (strtolower($row['INDEX_NAME']) == strtolower($index_name))
+				{
+					$this->db->sql_freeresult($result);
+					return true;
+				}
+			}
+		}
+		$this->db->sql_freeresult($result);
+
+		return false;
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	function sql_unique_index_exists($table_name, $index_name)
+	{
+		$sql = "EXEC sp_statistics '$table_name'";
+		$result = $this->db->sql_query($sql);
+
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			// Usually NON_UNIQUE is the column we want to check, but we allow for both
+			if ($row['TYPE'] == 3)
+			{
+				if (strtolower($row['INDEX_NAME']) == strtolower($index_name))
+				{
+					$this->db->sql_freeresult($result);
+					return true;
+				}
+			}
+		}
+		$this->db->sql_freeresult($result);
+
+		return false;
+	}
+
+	/**
+	 * {@inheritDoc}
+	*/
+	function sql_prepare_column_data($table_name, $column_name, $column_data)
+	{
+		if (strlen($column_name) > 30)
+		{
+			trigger_error("Column name '$column_name' on table '$table_name' is too long. The maximum is 30 characters.", E_USER_ERROR);
+		}
+
+		// Get type
+		list($column_type, ) = $this->get_column_type($column_data[0]);
+
+		// Adjust default value if db-dependent specified
+		if (is_array($column_data[1]))
+		{
+			$column_data[1] = (isset($column_data[1][$this->sql_layer])) ? $column_data[1][$this->sql_layer] : $column_data[1]['default'];
+		}
+
+		$sql = '';
+
+		$return_array = array();
+
+		$sql .= " {$column_type} ";
+		$sql_default = " {$column_type} ";
+
+		// For adding columns we need the default definition
+		if (!is_null($column_data[1]))
+		{
+			// For hexadecimal values do not use single quotes
+			if (strpos($column_data[1], '0x') === 0)
+			{
+				$return_array['default'] = 'DEFAULT (' . $column_data[1] . ') ';
+				$sql_default .= $return_array['default'];
+			}
+			else
+			{
+				$return_array['default'] = 'DEFAULT (' . ((is_numeric($column_data[1])) ? $column_data[1] : "'{$column_data[1]}'") . ') ';
+				$sql_default .= $return_array['default'];
+			}
+		}
+
+		if (isset($column_data[2]) && $column_data[2] == 'auto_increment')
+		{
+			// $sql .= 'IDENTITY (1, 1) ';
+			$sql_default .= 'IDENTITY (1, 1) ';
+		}
+
+		$return_array['textimage'] = $column_type === '[text]';
+
+		if (!is_null($column_data[1]) || (isset($column_data[2]) && $column_data[2] == 'auto_increment'))
+		{
+			$sql .= 'NOT NULL';
+			$sql_default .= 'NOT NULL';
+		}
+		else
+		{
+			$sql .= 'NULL';
+			$sql_default .= 'NULL';
+		}
+
+		$return_array['column_type_sql_default'] = $sql_default;
+
+		$return_array['column_type_sql'] = $sql;
+
+		return $return_array;
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	function sql_column_add($table_name, $column_name, $column_data, $inline = false)
+	{
+		$column_data = $this->sql_prepare_column_data($table_name, $column_name, $column_data);
+		$statements = array();
+
+		// Does not support AFTER, only through temporary table
+		$statements[] = 'ALTER TABLE [' . $table_name . '] ADD [' . $column_name . '] ' . $column_data['column_type_sql_default'];
+
+		return $this->_sql_run_sql($statements);
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	function sql_column_remove($table_name, $column_name, $inline = false)
+	{
+		$statements = array();
+
+		// We need the data here
+		$old_return_statements = $this->return_statements;
+		$this->return_statements = true;
+
+		$indexes = $this->get_existing_indexes($table_name, $column_name);
+		$indexes = array_merge($indexes, $this->get_existing_indexes($table_name, $column_name, true));
+
+		// Drop any indexes
+		$recreate_indexes = array();
+		if (!empty($indexes))
+		{
+			foreach ($indexes as $index_name => $index_data)
+			{
+				$result = $this->sql_index_drop($table_name, $index_name);
+				$statements = array_merge($statements, $result);
+				if (count($index_data) > 1)
+				{
+					// Remove this column from the index and recreate it
+					$recreate_indexes[$index_name] = array_diff($index_data, array($column_name));
+				}
+			}
+		}
+
+		// Drop primary keys depending on this column
+		$result = $this->mssql_get_drop_default_primary_key_queries($table_name, $column_name);
+		$statements = array_merge($statements, $result);
+
+		// Drop default value constraint
+		$result = $this->mssql_get_drop_default_constraints_queries($table_name, $column_name);
+		$statements = array_merge($statements, $result);
+
+		// Remove the column
+		$statements[] = 'ALTER TABLE [' . $table_name . '] DROP COLUMN [' . $column_name . ']';
+
+		if (!empty($recreate_indexes))
+		{
+			// Recreate indexes after we removed the column
+			foreach ($recreate_indexes as $index_name => $index_data)
+			{
+				$result = $this->sql_create_index($table_name, $index_name, $index_data);
+				$statements = array_merge($statements, $result);
+			}
+		}
+
+		$this->return_statements = $old_return_statements;
+
+		return $this->_sql_run_sql($statements);
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	function sql_index_drop($table_name, $index_name)
+	{
+		$statements = array();
+
+		$statements[] = 'DROP INDEX [' . $table_name . '].[' . $index_name . ']';
+
+		return $this->_sql_run_sql($statements);
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	function sql_table_drop($table_name)
+	{
+		$statements = array();
+
+		if (!$this->sql_table_exists($table_name))
+		{
+			return $this->_sql_run_sql($statements);
+		}
+
+		// the most basic operation, get rid of the table
+		$statements[] = 'DROP TABLE ' . $table_name;
+
+		return $this->_sql_run_sql($statements);
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	function sql_create_primary_key($table_name, $column, $inline = false)
+	{
+		$statements = array();
+
+		$sql = "ALTER TABLE [{$table_name}] WITH NOCHECK ADD ";
+		$sql .= "CONSTRAINT [PK_{$table_name}] PRIMARY KEY  CLUSTERED (";
+		$sql .= '[' . implode("],\n\t\t[", $column) . ']';
+		$sql .= ')';
+
+		$statements[] = $sql;
+
+		return $this->_sql_run_sql($statements);
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	function sql_create_unique_index($table_name, $index_name, $column)
+	{
+		$statements = array();
+
+		if ($this->mssql_is_sql_server_2000())
+		{
+			$this->check_index_name_length($table_name, $index_name);
+		}
+
+		$statements[] = 'CREATE UNIQUE INDEX [' . $index_name . '] ON [' . $table_name . ']([' . implode('], [', $column) . '])';
+
+		return $this->_sql_run_sql($statements);
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	function sql_create_index($table_name, $index_name, $column)
+	{
+		$statements = array();
+
+		$this->check_index_name_length($table_name, $index_name);
+
+		// remove index length
+		$column = preg_replace('#:.*$#', '', $column);
+
+		$statements[] = 'CREATE INDEX [' . $index_name . '] ON [' . $table_name . ']([' . implode('], [', $column) . '])';
+
+		return $this->_sql_run_sql($statements);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	protected function get_max_index_name_length()
+	{
+		if ($this->mssql_is_sql_server_2000())
+		{
+			return parent::get_max_index_name_length();
+		}
+		else
+		{
+			return 128;
+		}
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	function sql_list_index($table_name)
+	{
+		$index_array = array();
+		$sql = "EXEC sp_statistics '$table_name'";
+		$result = $this->db->sql_query($sql);
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			if ($row['TYPE'] == 3)
+			{
+				$index_array[] = strtolower($row['INDEX_NAME']);
+			}
+		}
+		$this->db->sql_freeresult($result);
+
+		return $index_array;
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	function sql_column_change($table_name, $column_name, $column_data, $inline = false)
+	{
+		$column_data = $this->sql_prepare_column_data($table_name, $column_name, $column_data);
+		$statements = array();
+
+		// We need the data here
+		$old_return_statements = $this->return_statements;
+		$this->return_statements = true;
+
+		$indexes = $this->get_existing_indexes($table_name, $column_name);
+		$unique_indexes = $this->get_existing_indexes($table_name, $column_name, true);
+
+		// Drop any indexes
+		if (!empty($indexes) || !empty($unique_indexes))
+		{
+			$drop_indexes = array_merge(array_keys($indexes), array_keys($unique_indexes));
+			foreach ($drop_indexes as $index_name)
+			{
+				$result = $this->sql_index_drop($table_name, $index_name);
+				$statements = array_merge($statements, $result);
+			}
+		}
+
+		// Drop default value constraint
+		$result = $this->mssql_get_drop_default_constraints_queries($table_name, $column_name);
+		$statements = array_merge($statements, $result);
+
+		// Change the column
+		$statements[] = 'ALTER TABLE [' . $table_name . '] ALTER COLUMN [' . $column_name . '] ' . $column_data['column_type_sql'];
+
+		if (!empty($column_data['default']) && !$this->mssql_is_column_identity($table_name, $column_name))
+		{
+			// Add new default value constraint
+			$statements[] = 'ALTER TABLE [' . $table_name . '] ADD CONSTRAINT [DF_' . $table_name . '_' . $column_name . '_1] ' . $column_data['default'] . ' FOR [' . $column_name . ']';
+		}
+
+		if (!empty($indexes))
+		{
+			// Recreate indexes after we changed the column
+			foreach ($indexes as $index_name => $index_data)
+			{
+				$result = $this->sql_create_index($table_name, $index_name, $index_data);
+				$statements = array_merge($statements, $result);
+			}
+		}
+
+		if (!empty($unique_indexes))
+		{
+			// Recreate unique indexes after we changed the column
+			foreach ($unique_indexes as $index_name => $index_data)
+			{
+				$result = $this->sql_create_unique_index($table_name, $index_name, $index_data);
+				$statements = array_merge($statements, $result);
+			}
+		}
+
+		$this->return_statements = $old_return_statements;
+
+		return $this->_sql_run_sql($statements);
+	}
+
+	/**
+	* Get queries to drop the default constraints of a column
+	*
+	* We need to drop the default constraints of a column,
+	* before being able to change their type or deleting them.
+	*
+	* @param string $table_name
+	* @param string $column_name
+	* @return array		Array with SQL statements
+	*/
+	protected function mssql_get_drop_default_constraints_queries($table_name, $column_name)
+	{
+		$statements = array();
+		if ($this->mssql_is_sql_server_2000())
+		{
+			// http://msdn.microsoft.com/en-us/library/aa175912%28v=sql.80%29.aspx
+			// Deprecated in SQL Server 2005
+			$sql = "SELECT so.name AS def_name
+				FROM sysobjects so
+				JOIN sysconstraints sc ON so.id = sc.constid
+				WHERE object_name(so.parent_obj) = '{$table_name}'
+					AND so.xtype = 'D'
+					AND sc.colid = (SELECT colid FROM syscolumns
+						WHERE id = object_id('{$table_name}')
+							AND name = '{$column_name}')";
+		}
+		else
+		{
+			$sql = "SELECT dobj.name AS def_name
+				FROM sys.columns col
+					LEFT OUTER JOIN sys.objects dobj ON (dobj.object_id = col.default_object_id AND dobj.type = 'D')
+				WHERE col.object_id = object_id('{$table_name}')
+					AND col.name = '{$column_name}'
+					AND dobj.name IS NOT NULL";
+		}
+
+		$result = $this->db->sql_query($sql);
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			$statements[] = 'ALTER TABLE [' . $table_name . '] DROP CONSTRAINT [' . $row['def_name'] . ']';
+		}
+		$this->db->sql_freeresult($result);
+
+		return $statements;
+	}
+
+	/**
+	 * Get queries to drop the primary keys depending on the specified column
+	 *
+	 * We need to drop primary keys depending on this column before being able
+	 * to delete them.
+	 *
+	 * @param string $table_name
+	 * @param string $column_name
+	 * @return array		Array with SQL statements
+	 */
+	protected function mssql_get_drop_default_primary_key_queries($table_name, $column_name)
+	{
+		$statements = array();
+
+		$sql = "SELECT ccu.CONSTRAINT_NAME, ccu.COLUMN_NAME
+			FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS tc
+				JOIN INFORMATION_SCHEMA.CONSTRAINT_COLUMN_USAGE ccu ON tc.CONSTRAINT_NAME = ccu.Constraint_name
+			WHERE tc.TABLE_NAME = '{$table_name}'
+				AND tc.CONSTRAINT_TYPE = 'Primary Key'
+				AND ccu.COLUMN_NAME = '{$column_name}'";
+
+		$result = $this->db->sql_query($sql);
+
+		while ($primary_key = $this->db->sql_fetchrow($result))
+		{
+			$statements[] = 'ALTER TABLE [' . $table_name . '] DROP CONSTRAINT [' . $primary_key['CONSTRAINT_NAME'] . ']';
+		}
+		$this->db->sql_freeresult($result);
+
+		return $statements;
+	}
+
+	/**
+	 * Checks to see if column is an identity column
+	 *
+	 * Identity columns cannot have defaults set for them.
+	 *
+	 * @param string $table_name
+	 * @param string $column_name
+	 * @return bool		true if identity, false if not
+	 */
+	protected function mssql_is_column_identity($table_name, $column_name)
+	{
+		if ($this->mssql_is_sql_server_2000())
+		{
+			// http://msdn.microsoft.com/en-us/library/aa175912%28v=sql.80%29.aspx
+			// Deprecated in SQL Server 2005
+			$sql = "SELECT COLUMNPROPERTY(object_id('{$table_name}'), '{$column_name}', 'IsIdentity') AS is_identity";
+		}
+		else
+		{
+			$sql = "SELECT is_identity FROM sys.columns
+					WHERE object_id = object_id('{$table_name}')
+					AND name = '{$column_name}'";
+		}
+
+		$result = $this->db->sql_query($sql);
+		$is_identity = $this->db->sql_fetchfield('is_identity');
+		$this->db->sql_freeresult($result);
+
+		return (bool) $is_identity;
+	}
+
+	/**
+	* Get a list with existing indexes for the column
+	*
+	* @param string $table_name
+	* @param string $column_name
+	* @param bool $unique Should we get unique indexes or normal ones
+	* @return array		Array with Index name => columns
+	*/
+	public function get_existing_indexes($table_name, $column_name, $unique = false)
+	{
+		$existing_indexes = array();
+		if ($this->mssql_is_sql_server_2000())
+		{
+			// http://msdn.microsoft.com/en-us/library/aa175912%28v=sql.80%29.aspx
+			// Deprecated in SQL Server 2005
+			$sql = "SELECT DISTINCT ix.name AS phpbb_index_name
+				FROM sysindexes ix
+				INNER JOIN sysindexkeys ixc
+					ON ixc.id = ix.id
+						AND ixc.indid = ix.indid
+				INNER JOIN syscolumns cols
+					ON cols.colid = ixc.colid
+						AND cols.id = ix.id
+				WHERE ix.id = object_id('{$table_name}')
+					AND cols.name = '{$column_name}'
+					AND INDEXPROPERTY(ix.id, ix.name, 'IsUnique') = " . ($unique ? '1' : '0');
+		}
+		else
+		{
+			$sql = "SELECT DISTINCT ix.name AS phpbb_index_name
+				FROM sys.indexes ix
+				INNER JOIN sys.index_columns ixc
+					ON ixc.object_id = ix.object_id
+						AND ixc.index_id = ix.index_id
+				INNER JOIN sys.columns cols
+					ON cols.column_id = ixc.column_id
+						AND cols.object_id = ix.object_id
+				WHERE ix.object_id = object_id('{$table_name}')
+					AND cols.name = '{$column_name}'
+					AND ix.is_primary_key = 0
+					AND ix.is_unique = " . ($unique ? '1' : '0');
+		}
+
+		$result = $this->db->sql_query($sql);
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			if (!isset($row['is_unique']) || ($unique && $row['is_unique'] == 'UNIQUE') || (!$unique && $row['is_unique'] == 'NONUNIQUE'))
+			{
+				$existing_indexes[$row['phpbb_index_name']] = array();
+			}
+		}
+		$this->db->sql_freeresult($result);
+
+		if (empty($existing_indexes))
+		{
+			return array();
+		}
+
+		if ($this->mssql_is_sql_server_2000())
+		{
+			$sql = "SELECT DISTINCT ix.name AS phpbb_index_name, cols.name AS phpbb_column_name
+				FROM sysindexes ix
+				INNER JOIN sysindexkeys ixc
+					ON ixc.id = ix.id
+						AND ixc.indid = ix.indid
+				INNER JOIN syscolumns cols
+					ON cols.colid = ixc.colid
+						AND cols.id = ix.id
+				WHERE ix.id = object_id('{$table_name}')
+					AND " . $this->db->sql_in_set('ix.name', array_keys($existing_indexes));
+		}
+		else
+		{
+			$sql = "SELECT DISTINCT ix.name AS phpbb_index_name, cols.name AS phpbb_column_name
+				FROM sys.indexes ix
+				INNER JOIN sys.index_columns ixc
+					ON ixc.object_id = ix.object_id
+						AND ixc.index_id = ix.index_id
+				INNER JOIN sys.columns cols
+					ON cols.column_id = ixc.column_id
+						AND cols.object_id = ix.object_id
+				WHERE ix.object_id = object_id('{$table_name}')
+					AND " . $this->db->sql_in_set('ix.name', array_keys($existing_indexes));
+		}
+
+		$result = $this->db->sql_query($sql);
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			$existing_indexes[$row['phpbb_index_name']][] = $row['phpbb_column_name'];
+		}
+		$this->db->sql_freeresult($result);
+
+		return $existing_indexes;
+	}
+
+	/**
+	* Is the used MS SQL Server a SQL Server 2000?
+	*
+	* @return bool
+	*/
+	protected function mssql_is_sql_server_2000()
+	{
+		if ($this->is_sql_server_2000 === null)
+		{
+			$sql = "SELECT CAST(SERVERPROPERTY('productversion') AS VARCHAR(25)) AS mssql_version";
+			$result = $this->db->sql_query($sql);
+			$properties = $this->db->sql_fetchrow($result);
+			$this->db->sql_freeresult($result);
+			$this->is_sql_server_2000 = $properties['mssql_version'][0] == '8';
+		}
+
+		return $this->is_sql_server_2000;
+	}
+
+}
diff --git a/phpBB/phpbb/db/tools/postgres.php b/phpBB/phpbb/db/tools/postgres.php
new file mode 100644
index 0000000000..077d6e06f9
--- /dev/null
+++ b/phpBB/phpbb/db/tools/postgres.php
@@ -0,0 +1,614 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\db\tools;
+
+/**
+ * Database Tools for handling cross-db actions such as altering columns, etc.
+ * Currently not supported is returning SQL for creating tables.
+ */
+class postgres extends tools
+{
+	/**
+	 * Get the column types for postgres only
+	 *
+	 * @return array
+	 */
+	public static function get_dbms_type_map()
+	{
+		return array(
+			'postgres'	=> array(
+				'INT:'		=> 'INT4',
+				'BINT'		=> 'INT8',
+				'ULINT'		=> 'INT4', // unsigned
+				'UINT'		=> 'INT4', // unsigned
+				'UINT:'		=> 'INT4', // unsigned
+				'USINT'		=> 'INT2', // unsigned
+				'BOOL'		=> 'INT2', // unsigned
+				'TINT:'		=> 'INT2',
+				'VCHAR'		=> 'varchar(255)',
+				'VCHAR:'	=> 'varchar(%d)',
+				'CHAR:'		=> 'char(%d)',
+				'XSTEXT'	=> 'varchar(1000)',
+				'STEXT'		=> 'varchar(3000)',
+				'TEXT'		=> 'varchar(8000)',
+				'MTEXT'		=> 'TEXT',
+				'XSTEXT_UNI'=> 'varchar(100)',
+				'STEXT_UNI'	=> 'varchar(255)',
+				'TEXT_UNI'	=> 'varchar(4000)',
+				'MTEXT_UNI'	=> 'TEXT',
+				'TIMESTAMP'	=> 'INT4', // unsigned
+				'DECIMAL'	=> 'decimal(5,2)',
+				'DECIMAL:'	=> 'decimal(%d,2)',
+				'PDECIMAL'	=> 'decimal(6,3)',
+				'PDECIMAL:'	=> 'decimal(%d,3)',
+				'VCHAR_UNI'	=> 'varchar(255)',
+				'VCHAR_UNI:'=> 'varchar(%d)',
+				'VCHAR_CI'	=> 'varchar_ci',
+				'VARBINARY'	=> 'bytea',
+			),
+		);
+	}
+
+	/**
+	* Constructor. Set DB Object and set {@link $return_statements return_statements}.
+	*
+	* @param \phpbb\db\driver\driver_interface	$db					Database connection
+	* @param bool		$return_statements	True if only statements should be returned and no SQL being executed
+	*/
+	public function __construct(\phpbb\db\driver\driver_interface $db, $return_statements = false)
+	{
+		parent::__construct($db, $return_statements);
+
+		// Determine mapping database type
+		$this->sql_layer = 'postgres';
+
+		$this->dbms_type_map = self::get_dbms_type_map();
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	function sql_list_tables()
+	{
+		$sql = 'SELECT relname
+			FROM pg_stat_user_tables';
+		$result = $this->db->sql_query($sql);
+
+		$tables = array();
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			$name = current($row);
+			$tables[$name] = $name;
+		}
+		$this->db->sql_freeresult($result);
+
+		return $tables;
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	function sql_create_table($table_name, $table_data)
+	{
+		// holds the DDL for a column
+		$columns = $statements = array();
+
+		if ($this->sql_table_exists($table_name))
+		{
+			return $this->_sql_run_sql($statements);
+		}
+
+		// Begin transaction
+		$statements[] = 'begin';
+
+		// Determine if we have created a PRIMARY KEY in the earliest
+		$primary_key_gen = false;
+
+		// Determine if the table requires a sequence
+		$create_sequence = false;
+
+		// Begin table sql statement
+		$table_sql = 'CREATE TABLE ' . $table_name . ' (' . "\n";
+
+		// Iterate through the columns to create a table
+		foreach ($table_data['COLUMNS'] as $column_name => $column_data)
+		{
+			// here lies an array, filled with information compiled on the column's data
+			$prepared_column = $this->sql_prepare_column_data($table_name, $column_name, $column_data);
+
+			if (isset($prepared_column['auto_increment']) && $prepared_column['auto_increment'] && strlen($column_name) > 26) // "${column_name}_gen"
+			{
+				trigger_error("Index name '${column_name}_gen' on table '$table_name' is too long. The maximum auto increment column length is 26 characters.", E_USER_ERROR);
+			}
+
+			// here we add the definition of the new column to the list of columns
+			$columns[] = "\t {$column_name} " . $prepared_column['column_type_sql'];
+
+			// see if we have found a primary key set due to a column definition if we have found it, we can stop looking
+			if (!$primary_key_gen)
+			{
+				$primary_key_gen = isset($prepared_column['primary_key_set']) && $prepared_column['primary_key_set'];
+			}
+
+			// create sequence DDL based off of the existance of auto incrementing columns
+			if (!$create_sequence && isset($prepared_column['auto_increment']) && $prepared_column['auto_increment'])
+			{
+				$create_sequence = $column_name;
+			}
+		}
+
+		// this makes up all the columns in the create table statement
+		$table_sql .= implode(",\n", $columns);
+
+		// we have yet to create a primary key for this table,
+		// this means that we can add the one we really wanted instead
+		if (!$primary_key_gen)
+		{
+			// Write primary key
+			if (isset($table_data['PRIMARY_KEY']))
+			{
+				if (!is_array($table_data['PRIMARY_KEY']))
+				{
+					$table_data['PRIMARY_KEY'] = array($table_data['PRIMARY_KEY']);
+				}
+
+				$table_sql .= ",\n\t PRIMARY KEY (" . implode(', ', $table_data['PRIMARY_KEY']) . ')';
+			}
+		}
+
+		// do we need to add a sequence for auto incrementing columns?
+		if ($create_sequence)
+		{
+			$statements[] = "CREATE SEQUENCE {$table_name}_seq;";
+		}
+
+		// close the table
+		$table_sql .= "\n);";
+		$statements[] = $table_sql;
+
+		// Write Keys
+		if (isset($table_data['KEYS']))
+		{
+			foreach ($table_data['KEYS'] as $key_name => $key_data)
+			{
+				if (!is_array($key_data[1]))
+				{
+					$key_data[1] = array($key_data[1]);
+				}
+
+				$old_return_statements = $this->return_statements;
+				$this->return_statements = true;
+
+				$key_stmts = ($key_data[0] == 'UNIQUE') ? $this->sql_create_unique_index($table_name, $key_name, $key_data[1]) : $this->sql_create_index($table_name, $key_name, $key_data[1]);
+
+				foreach ($key_stmts as $key_stmt)
+				{
+					$statements[] = $key_stmt;
+				}
+
+				$this->return_statements = $old_return_statements;
+			}
+		}
+
+		// Commit Transaction
+		$statements[] = 'commit';
+
+		return $this->_sql_run_sql($statements);
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	function sql_list_columns($table_name)
+	{
+		$columns = array();
+
+		$sql = "SELECT a.attname
+			FROM pg_class c, pg_attribute a
+			WHERE c.relname = '{$table_name}'
+				AND a.attnum > 0
+				AND a.attrelid = c.oid";
+		$result = $this->db->sql_query($sql);
+
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			$column = strtolower(current($row));
+			$columns[$column] = $column;
+		}
+		$this->db->sql_freeresult($result);
+
+		return $columns;
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	function sql_index_exists($table_name, $index_name)
+	{
+		$sql = "SELECT ic.relname as index_name
+			FROM pg_class bc, pg_class ic, pg_index i
+			WHERE (bc.oid = i.indrelid)
+				AND (ic.oid = i.indexrelid)
+				AND (bc.relname = '" . $table_name . "')
+				AND (i.indisunique != 't')
+				AND (i.indisprimary != 't')";
+		$result = $this->db->sql_query($sql);
+
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			// This DBMS prefixes index names with the table name
+			$row['index_name'] = $this->strip_table_name_from_index_name($table_name, $row['index_name']);
+
+			if (strtolower($row['index_name']) == strtolower($index_name))
+			{
+				$this->db->sql_freeresult($result);
+				return true;
+			}
+		}
+		$this->db->sql_freeresult($result);
+
+		return false;
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	function sql_unique_index_exists($table_name, $index_name)
+	{
+		$sql = "SELECT ic.relname as index_name, i.indisunique
+			FROM pg_class bc, pg_class ic, pg_index i
+			WHERE (bc.oid = i.indrelid)
+				AND (ic.oid = i.indexrelid)
+				AND (bc.relname = '" . $table_name . "')
+				AND (i.indisprimary != 't')";
+		$result = $this->db->sql_query($sql);
+
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			if ($row['indisunique'] != 't')
+			{
+				continue;
+			}
+
+			// This DBMS prefixes index names with the table name
+			$row['index_name'] = $this->strip_table_name_from_index_name($table_name, $row['index_name']);
+
+			if (strtolower($row['index_name']) == strtolower($index_name))
+			{
+				$this->db->sql_freeresult($result);
+				return true;
+			}
+		}
+		$this->db->sql_freeresult($result);
+
+		return false;
+	}
+
+	/**
+	* Function to prepare some column information for better usage
+	* @access private
+	*/
+	function sql_prepare_column_data($table_name, $column_name, $column_data)
+	{
+		if (strlen($column_name) > 30)
+		{
+			trigger_error("Column name '$column_name' on table '$table_name' is too long. The maximum is 30 characters.", E_USER_ERROR);
+		}
+
+		// Get type
+		list($column_type, $orig_column_type) = $this->get_column_type($column_data[0]);
+
+		// Adjust default value if db-dependent specified
+		if (is_array($column_data[1]))
+		{
+			$column_data[1] = (isset($column_data[1][$this->sql_layer])) ? $column_data[1][$this->sql_layer] : $column_data[1]['default'];
+		}
+
+		$sql = " {$column_type} ";
+
+		$return_array = array(
+			'column_type'		=> $column_type,
+			'auto_increment'	=> false,
+		);
+
+		if (isset($column_data[2]) && $column_data[2] == 'auto_increment')
+		{
+			$default_val = "nextval('{$table_name}_seq')";
+			$return_array['auto_increment'] = true;
+		}
+		else if (!is_null($column_data[1]))
+		{
+			$default_val = "'" . $column_data[1] . "'";
+			$return_array['null'] = 'NOT NULL';
+			$sql .= 'NOT NULL ';
+		}
+		else
+		{
+			// Integers need to have 0 instead of empty string as default
+			if (strpos($column_type, 'INT') === 0)
+			{
+				$default_val = '0';
+			}
+			else
+			{
+				$default_val = "'" . $column_data[1] . "'";
+			}
+			$return_array['null'] = 'NULL';
+			$sql .= 'NULL ';
+		}
+
+		$return_array['default'] = $default_val;
+
+		$sql .= "DEFAULT {$default_val}";
+
+		// Unsigned? Then add a CHECK contraint
+		if (in_array($orig_column_type, $this->unsigned_types))
+		{
+			$return_array['constraint'] = "CHECK ({$column_name} >= 0)";
+			$sql .= " CHECK ({$column_name} >= 0)";
+		}
+
+		$return_array['column_type_sql'] = $sql;
+
+		return $return_array;
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	function sql_column_add($table_name, $column_name, $column_data, $inline = false)
+	{
+		$column_data = $this->sql_prepare_column_data($table_name, $column_name, $column_data);
+		$statements = array();
+
+		// Does not support AFTER, only through temporary table
+		if (version_compare($this->db->sql_server_info(true), '8.0', '>='))
+		{
+			$statements[] = 'ALTER TABLE ' . $table_name . ' ADD COLUMN "' . $column_name . '" ' . $column_data['column_type_sql'];
+		}
+		else
+		{
+			// old versions cannot add columns with default and null information
+			$statements[] = 'ALTER TABLE ' . $table_name . ' ADD COLUMN "' . $column_name . '" ' . $column_data['column_type'] . ' ' . $column_data['constraint'];
+
+			if (isset($column_data['null']))
+			{
+				if ($column_data['null'] == 'NOT NULL')
+				{
+					$statements[] = 'ALTER TABLE ' . $table_name . ' ALTER COLUMN ' . $column_name . ' SET NOT NULL';
+				}
+			}
+
+			if (isset($column_data['default']))
+			{
+				$statements[] = 'ALTER TABLE ' . $table_name . ' ALTER COLUMN ' . $column_name . ' SET DEFAULT ' . $column_data['default'];
+			}
+		}
+
+		return $this->_sql_run_sql($statements);
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	function sql_column_remove($table_name, $column_name, $inline = false)
+	{
+		$statements = array();
+
+		$statements[] = 'ALTER TABLE ' . $table_name . ' DROP COLUMN "' . $column_name . '"';
+
+		return $this->_sql_run_sql($statements);
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	function sql_index_drop($table_name, $index_name)
+	{
+		$statements = array();
+
+		$statements[] = 'DROP INDEX ' . $table_name . '_' . $index_name;
+
+		return $this->_sql_run_sql($statements);
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	function sql_table_drop($table_name)
+	{
+		$statements = array();
+
+		if (!$this->sql_table_exists($table_name))
+		{
+			return $this->_sql_run_sql($statements);
+		}
+
+		// the most basic operation, get rid of the table
+		$statements[] = 'DROP TABLE ' . $table_name;
+
+		// PGSQL does not "tightly" bind sequences and tables, we must guess...
+		$sql = "SELECT relname
+			FROM pg_class
+			WHERE relkind = 'S'
+				AND relname = '{$table_name}_seq'";
+		$result = $this->db->sql_query($sql);
+
+		// We don't even care about storing the results. We already know the answer if we get rows back.
+		if ($this->db->sql_fetchrow($result))
+		{
+			$statements[] =  "DROP SEQUENCE IF EXISTS {$table_name}_seq;\n";
+		}
+		$this->db->sql_freeresult($result);
+
+		return $this->_sql_run_sql($statements);
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	function sql_create_primary_key($table_name, $column, $inline = false)
+	{
+		$statements = array();
+
+		$statements[] = 'ALTER TABLE ' . $table_name . ' ADD PRIMARY KEY (' . implode(', ', $column) . ')';
+
+		return $this->_sql_run_sql($statements);
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	function sql_create_unique_index($table_name, $index_name, $column)
+	{
+		$statements = array();
+
+		$this->check_index_name_length($table_name, $index_name);
+
+		$statements[] = 'CREATE UNIQUE INDEX ' . $table_name . '_' . $index_name . ' ON ' . $table_name . '(' . implode(', ', $column) . ')';
+
+		return $this->_sql_run_sql($statements);
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	function sql_create_index($table_name, $index_name, $column)
+	{
+		$statements = array();
+
+		$this->check_index_name_length($table_name, $index_name);
+
+		// remove index length
+		$column = preg_replace('#:.*$#', '', $column);
+
+		$statements[] = 'CREATE INDEX ' . $table_name . '_' . $index_name . ' ON ' . $table_name . '(' . implode(', ', $column) . ')';
+
+		return $this->_sql_run_sql($statements);
+	}
+
+
+	/**
+	 * {@inheritDoc}
+	 */
+	function sql_list_index($table_name)
+	{
+		$index_array = array();
+
+		$sql = "SELECT ic.relname as index_name
+			FROM pg_class bc, pg_class ic, pg_index i
+			WHERE (bc.oid = i.indrelid)
+				AND (ic.oid = i.indexrelid)
+				AND (bc.relname = '" . $table_name . "')
+				AND (i.indisunique != 't')
+				AND (i.indisprimary != 't')";
+		$result = $this->db->sql_query($sql);
+
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			$row['index_name'] = $this->strip_table_name_from_index_name($table_name, $row['index_name']);
+
+			$index_array[] = $row['index_name'];
+		}
+		$this->db->sql_freeresult($result);
+
+		return array_map('strtolower', $index_array);
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	function sql_column_change($table_name, $column_name, $column_data, $inline = false)
+	{
+		$column_data = $this->sql_prepare_column_data($table_name, $column_name, $column_data);
+		$statements = array();
+
+		$sql = 'ALTER TABLE ' . $table_name . ' ';
+
+		$sql_array = array();
+		$sql_array[] = 'ALTER COLUMN ' . $column_name . ' TYPE ' . $column_data['column_type'];
+
+		if (isset($column_data['null']))
+		{
+			if ($column_data['null'] == 'NOT NULL')
+			{
+				$sql_array[] = 'ALTER COLUMN ' . $column_name . ' SET NOT NULL';
+			}
+			else if ($column_data['null'] == 'NULL')
+			{
+				$sql_array[] = 'ALTER COLUMN ' . $column_name . ' DROP NOT NULL';
+			}
+		}
+
+		if (isset($column_data['default']))
+		{
+			$sql_array[] = 'ALTER COLUMN ' . $column_name . ' SET DEFAULT ' . $column_data['default'];
+		}
+
+		// we don't want to double up on constraints if we change different number data types
+		if (isset($column_data['constraint']))
+		{
+			$constraint_sql = "SELECT consrc as constraint_data
+				FROM pg_constraint, pg_class bc
+				WHERE conrelid = bc.oid
+					AND bc.relname = '{$table_name}'
+					AND NOT EXISTS (
+						SELECT *
+						FROM pg_constraint as c, pg_inherits as i
+						WHERE i.inhrelid = pg_constraint.conrelid
+							AND c.conname = pg_constraint.conname
+							AND c.consrc = pg_constraint.consrc
+							AND c.conrelid = i.inhparent
+					)";
+
+			$constraint_exists = false;
+
+			$result = $this->db->sql_query($constraint_sql);
+			while ($row = $this->db->sql_fetchrow($result))
+			{
+				if (trim($row['constraint_data']) == trim($column_data['constraint']))
+				{
+					$constraint_exists = true;
+					break;
+				}
+			}
+			$this->db->sql_freeresult($result);
+
+			if (!$constraint_exists)
+			{
+				$sql_array[] = 'ADD ' . $column_data['constraint'];
+			}
+		}
+
+		$sql .= implode(', ', $sql_array);
+
+		$statements[] = $sql;
+
+		return $this->_sql_run_sql($statements);
+	}
+
+	/**
+	* Get a list with existing indexes for the column
+	*
+	* @param string $table_name
+	* @param string $column_name
+	* @param bool $unique Should we get unique indexes or normal ones
+	* @return array		Array with Index name => columns
+	*/
+	public function get_existing_indexes($table_name, $column_name, $unique = false)
+	{
+		// Not supported
+		throw new \Exception('DBMS is not supported');
+	}
+}
diff --git a/phpBB/phpbb/db/tools/tools.php b/phpBB/phpbb/db/tools/tools.php
new file mode 100644
index 0000000000..c3352a1f66
--- /dev/null
+++ b/phpBB/phpbb/db/tools/tools.php
@@ -0,0 +1,1956 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\tools;
+
+/**
+* Database Tools for handling cross-db actions such as altering columns, etc.
+* Currently not supported is returning SQL for creating tables.
+*/
+class tools implements tools_interface
+{
+	/**
+	* Current sql layer
+	*/
+	var $sql_layer = '';
+
+	/**
+	* @var object DB object
+	*/
+	var $db = null;
+
+	/**
+	* The Column types for every database we support
+	* @var array
+	*/
+	var $dbms_type_map = array();
+
+	/**
+	* Get the column types for every database we support
+	*
+	* @return array
+	*/
+	static public function get_dbms_type_map()
+	{
+		return array(
+			'mysql_41'	=> array(
+				'INT:'		=> 'int(%d)',
+				'BINT'		=> 'bigint(20)',
+				'ULINT'		=> 'INT(10) UNSIGNED',
+				'UINT'		=> 'mediumint(8) UNSIGNED',
+				'UINT:'		=> 'int(%d) UNSIGNED',
+				'TINT:'		=> 'tinyint(%d)',
+				'USINT'		=> 'smallint(4) UNSIGNED',
+				'BOOL'		=> 'tinyint(1) UNSIGNED',
+				'VCHAR'		=> 'varchar(255)',
+				'VCHAR:'	=> 'varchar(%d)',
+				'CHAR:'		=> 'char(%d)',
+				'XSTEXT'	=> 'text',
+				'XSTEXT_UNI'=> 'varchar(100)',
+				'STEXT'		=> 'text',
+				'STEXT_UNI'	=> 'varchar(255)',
+				'TEXT'		=> 'text',
+				'TEXT_UNI'	=> 'text',
+				'MTEXT'		=> 'mediumtext',
+				'MTEXT_UNI'	=> 'mediumtext',
+				'TIMESTAMP'	=> 'int(11) UNSIGNED',
+				'DECIMAL'	=> 'decimal(5,2)',
+				'DECIMAL:'	=> 'decimal(%d,2)',
+				'PDECIMAL'	=> 'decimal(6,3)',
+				'PDECIMAL:'	=> 'decimal(%d,3)',
+				'VCHAR_UNI'	=> 'varchar(255)',
+				'VCHAR_UNI:'=> 'varchar(%d)',
+				'VCHAR_CI'	=> 'varchar(255)',
+				'VARBINARY'	=> 'varbinary(255)',
+			),
+
+			'mysql_40'	=> array(
+				'INT:'		=> 'int(%d)',
+				'BINT'		=> 'bigint(20)',
+				'ULINT'		=> 'INT(10) UNSIGNED',
+				'UINT'		=> 'mediumint(8) UNSIGNED',
+				'UINT:'		=> 'int(%d) UNSIGNED',
+				'TINT:'		=> 'tinyint(%d)',
+				'USINT'		=> 'smallint(4) UNSIGNED',
+				'BOOL'		=> 'tinyint(1) UNSIGNED',
+				'VCHAR'		=> 'varbinary(255)',
+				'VCHAR:'	=> 'varbinary(%d)',
+				'CHAR:'		=> 'binary(%d)',
+				'XSTEXT'	=> 'blob',
+				'XSTEXT_UNI'=> 'blob',
+				'STEXT'		=> 'blob',
+				'STEXT_UNI'	=> 'blob',
+				'TEXT'		=> 'blob',
+				'TEXT_UNI'	=> 'blob',
+				'MTEXT'		=> 'mediumblob',
+				'MTEXT_UNI'	=> 'mediumblob',
+				'TIMESTAMP'	=> 'int(11) UNSIGNED',
+				'DECIMAL'	=> 'decimal(5,2)',
+				'DECIMAL:'	=> 'decimal(%d,2)',
+				'PDECIMAL'	=> 'decimal(6,3)',
+				'PDECIMAL:'	=> 'decimal(%d,3)',
+				'VCHAR_UNI'	=> 'blob',
+				'VCHAR_UNI:'=> array('varbinary(%d)', 'limit' => array('mult', 3, 255, 'blob')),
+				'VCHAR_CI'	=> 'blob',
+				'VARBINARY'	=> 'varbinary(255)',
+			),
+
+			'oracle'	=> array(
+				'INT:'		=> 'number(%d)',
+				'BINT'		=> 'number(20)',
+				'ULINT'		=> 'number(10)',
+				'UINT'		=> 'number(8)',
+				'UINT:'		=> 'number(%d)',
+				'TINT:'		=> 'number(%d)',
+				'USINT'		=> 'number(4)',
+				'BOOL'		=> 'number(1)',
+				'VCHAR'		=> 'varchar2(255)',
+				'VCHAR:'	=> 'varchar2(%d)',
+				'CHAR:'		=> 'char(%d)',
+				'XSTEXT'	=> 'varchar2(1000)',
+				'STEXT'		=> 'varchar2(3000)',
+				'TEXT'		=> 'clob',
+				'MTEXT'		=> 'clob',
+				'XSTEXT_UNI'=> 'varchar2(300)',
+				'STEXT_UNI'	=> 'varchar2(765)',
+				'TEXT_UNI'	=> 'clob',
+				'MTEXT_UNI'	=> 'clob',
+				'TIMESTAMP'	=> 'number(11)',
+				'DECIMAL'	=> 'number(5, 2)',
+				'DECIMAL:'	=> 'number(%d, 2)',
+				'PDECIMAL'	=> 'number(6, 3)',
+				'PDECIMAL:'	=> 'number(%d, 3)',
+				'VCHAR_UNI'	=> 'varchar2(765)',
+				'VCHAR_UNI:'=> array('varchar2(%d)', 'limit' => array('mult', 3, 765, 'clob')),
+				'VCHAR_CI'	=> 'varchar2(255)',
+				'VARBINARY'	=> 'raw(255)',
+			),
+
+			'sqlite3'	=> array(
+				'INT:'		=> 'INT(%d)',
+				'BINT'		=> 'BIGINT(20)',
+				'ULINT'		=> 'INTEGER UNSIGNED',
+				'UINT'		=> 'INTEGER UNSIGNED',
+				'UINT:'		=> 'INTEGER UNSIGNED',
+				'TINT:'		=> 'TINYINT(%d)',
+				'USINT'		=> 'INTEGER UNSIGNED',
+				'BOOL'		=> 'INTEGER UNSIGNED',
+				'VCHAR'		=> 'VARCHAR(255)',
+				'VCHAR:'	=> 'VARCHAR(%d)',
+				'CHAR:'		=> 'CHAR(%d)',
+				'XSTEXT'	=> 'TEXT(65535)',
+				'STEXT'		=> 'TEXT(65535)',
+				'TEXT'		=> 'TEXT(65535)',
+				'MTEXT'		=> 'MEDIUMTEXT(16777215)',
+				'XSTEXT_UNI'=> 'TEXT(65535)',
+				'STEXT_UNI'	=> 'TEXT(65535)',
+				'TEXT_UNI'	=> 'TEXT(65535)',
+				'MTEXT_UNI'	=> 'MEDIUMTEXT(16777215)',
+				'TIMESTAMP'	=> 'INTEGER UNSIGNED', //'int(11) UNSIGNED',
+				'DECIMAL'	=> 'DECIMAL(5,2)',
+				'DECIMAL:'	=> 'DECIMAL(%d,2)',
+				'PDECIMAL'	=> 'DECIMAL(6,3)',
+				'PDECIMAL:'	=> 'DECIMAL(%d,3)',
+				'VCHAR_UNI'	=> 'VARCHAR(255)',
+				'VCHAR_UNI:'=> 'VARCHAR(%d)',
+				'VCHAR_CI'	=> 'VARCHAR(255)',
+				'VARBINARY'	=> 'BLOB',
+			),
+		);
+	}
+
+	/**
+	* A list of types being unsigned for better reference in some db's
+	* @var array
+	*/
+	var $unsigned_types = array('ULINT', 'UINT', 'UINT:', 'USINT', 'BOOL', 'TIMESTAMP');
+
+	/**
+	* This is set to true if user only wants to return the 'to-be-executed' SQL statement(s) (as an array).
+	* This mode has no effect on some methods (inserting of data for example). This is expressed within the methods command.
+	*/
+	var $return_statements = false;
+
+	/**
+	* Constructor. Set DB Object and set {@link $return_statements return_statements}.
+	*
+	* @param \phpbb\db\driver\driver_interface	$db					Database connection
+	* @param bool		$return_statements	True if only statements should be returned and no SQL being executed
+	*/
+	public function __construct(\phpbb\db\driver\driver_interface $db, $return_statements = false)
+	{
+		$this->db = $db;
+		$this->return_statements = $return_statements;
+
+		$this->dbms_type_map = self::get_dbms_type_map();
+
+		// Determine mapping database type
+		switch ($this->db->get_sql_layer())
+		{
+			case 'mysql':
+				$this->sql_layer = 'mysql_40';
+			break;
+
+			case 'mysql4':
+				if (version_compare($this->db->sql_server_info(true), '4.1.3', '>='))
+				{
+					$this->sql_layer = 'mysql_41';
+				}
+				else
+				{
+					$this->sql_layer = 'mysql_40';
+				}
+			break;
+
+			case 'mysqli':
+				$this->sql_layer = 'mysql_41';
+			break;
+
+			default:
+				$this->sql_layer = $this->db->get_sql_layer();
+			break;
+		}
+	}
+
+	/**
+	* Setter for {@link $return_statements return_statements}.
+	*
+	* @param bool $return_statements True if SQL should not be executed but returned as strings
+	* @return null
+	*/
+	public function set_return_statements($return_statements)
+	{
+		$this->return_statements = $return_statements;
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	function sql_list_tables()
+	{
+		switch ($this->db->get_sql_layer())
+		{
+			case 'mysql':
+			case 'mysql4':
+			case 'mysqli':
+				$sql = 'SHOW TABLES';
+			break;
+
+			case 'sqlite3':
+				$sql = 'SELECT name
+					FROM sqlite_master
+					WHERE type = "table"
+						AND name <> "sqlite_sequence"';
+			break;
+
+			case 'oracle':
+				$sql = 'SELECT table_name
+					FROM USER_TABLES';
+			break;
+		}
+
+		$result = $this->db->sql_query($sql);
+
+		$tables = array();
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			$name = current($row);
+			$tables[$name] = $name;
+		}
+		$this->db->sql_freeresult($result);
+
+		return $tables;
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	function sql_table_exists($table_name)
+	{
+		$this->db->sql_return_on_error(true);
+		$result = $this->db->sql_query_limit('SELECT * FROM ' . $table_name, 1);
+		$this->db->sql_return_on_error(false);
+
+		if ($result)
+		{
+			$this->db->sql_freeresult($result);
+			return true;
+		}
+
+		return false;
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	function sql_create_table($table_name, $table_data)
+	{
+		// holds the DDL for a column
+		$columns = $statements = array();
+
+		if ($this->sql_table_exists($table_name))
+		{
+			return $this->_sql_run_sql($statements);
+		}
+
+		// Begin transaction
+		$statements[] = 'begin';
+
+		// Determine if we have created a PRIMARY KEY in the earliest
+		$primary_key_gen = false;
+
+		// Determine if the table requires a sequence
+		$create_sequence = false;
+
+		// Begin table sql statement
+		$table_sql = 'CREATE TABLE ' . $table_name . ' (' . "\n";
+
+		// Iterate through the columns to create a table
+		foreach ($table_data['COLUMNS'] as $column_name => $column_data)
+		{
+			// here lies an array, filled with information compiled on the column's data
+			$prepared_column = $this->sql_prepare_column_data($table_name, $column_name, $column_data);
+
+			if (isset($prepared_column['auto_increment']) && $prepared_column['auto_increment'] && strlen($column_name) > 26) // "${column_name}_gen"
+			{
+				trigger_error("Index name '${column_name}_gen' on table '$table_name' is too long. The maximum auto increment column length is 26 characters.", E_USER_ERROR);
+			}
+
+			// here we add the definition of the new column to the list of columns
+			$columns[] = "\t {$column_name} " . $prepared_column['column_type_sql'];
+
+			// see if we have found a primary key set due to a column definition if we have found it, we can stop looking
+			if (!$primary_key_gen)
+			{
+				$primary_key_gen = isset($prepared_column['primary_key_set']) && $prepared_column['primary_key_set'];
+			}
+
+			// create sequence DDL based off of the existance of auto incrementing columns
+			if (!$create_sequence && isset($prepared_column['auto_increment']) && $prepared_column['auto_increment'])
+			{
+				$create_sequence = $column_name;
+			}
+		}
+
+		// this makes up all the columns in the create table statement
+		$table_sql .= implode(",\n", $columns);
+
+		// we have yet to create a primary key for this table,
+		// this means that we can add the one we really wanted instead
+		if (!$primary_key_gen)
+		{
+			// Write primary key
+			if (isset($table_data['PRIMARY_KEY']))
+			{
+				if (!is_array($table_data['PRIMARY_KEY']))
+				{
+					$table_data['PRIMARY_KEY'] = array($table_data['PRIMARY_KEY']);
+				}
+
+				switch ($this->sql_layer)
+				{
+					case 'mysql_40':
+					case 'mysql_41':
+					case 'sqlite3':
+						$table_sql .= ",\n\t PRIMARY KEY (" . implode(', ', $table_data['PRIMARY_KEY']) . ')';
+					break;
+
+					case 'oracle':
+						$table_sql .= ",\n\t CONSTRAINT pk_{$table_name} PRIMARY KEY (" . implode(', ', $table_data['PRIMARY_KEY']) . ')';
+					break;
+				}
+			}
+		}
+
+		// close the table
+		switch ($this->sql_layer)
+		{
+			case 'mysql_41':
+				// make sure the table is in UTF-8 mode
+				$table_sql .= "\n) CHARACTER SET `utf8` COLLATE `utf8_bin`;";
+				$statements[] = $table_sql;
+			break;
+
+			case 'mysql_40':
+			case 'sqlite3':
+				$table_sql .= "\n);";
+				$statements[] = $table_sql;
+			break;
+
+			case 'oracle':
+				$table_sql .= "\n)";
+				$statements[] = $table_sql;
+
+				// do we need to add a sequence and a tigger for auto incrementing columns?
+				if ($create_sequence)
+				{
+					// create the actual sequence
+					$statements[] = "CREATE SEQUENCE {$table_name}_seq";
+
+					// the trigger is the mechanism by which we increment the counter
+					$trigger = "CREATE OR REPLACE TRIGGER t_{$table_name}\n";
+					$trigger .= "BEFORE INSERT ON {$table_name}\n";
+					$trigger .= "FOR EACH ROW WHEN (\n";
+					$trigger .= "\tnew.{$create_sequence} IS NULL OR new.{$create_sequence} = 0\n";
+					$trigger .= ")\n";
+					$trigger .= "BEGIN\n";
+					$trigger .= "\tSELECT {$table_name}_seq.nextval\n";
+					$trigger .= "\tINTO :new.{$create_sequence}\n";
+					$trigger .= "\tFROM dual;\n";
+					$trigger .= "END;";
+
+					$statements[] = $trigger;
+				}
+			break;
+		}
+
+		// Write Keys
+		if (isset($table_data['KEYS']))
+		{
+			foreach ($table_data['KEYS'] as $key_name => $key_data)
+			{
+				if (!is_array($key_data[1]))
+				{
+					$key_data[1] = array($key_data[1]);
+				}
+
+				$old_return_statements = $this->return_statements;
+				$this->return_statements = true;
+
+				$key_stmts = ($key_data[0] == 'UNIQUE') ? $this->sql_create_unique_index($table_name, $key_name, $key_data[1]) : $this->sql_create_index($table_name, $key_name, $key_data[1]);
+
+				foreach ($key_stmts as $key_stmt)
+				{
+					$statements[] = $key_stmt;
+				}
+
+				$this->return_statements = $old_return_statements;
+			}
+		}
+
+		// Commit Transaction
+		$statements[] = 'commit';
+
+		return $this->_sql_run_sql($statements);
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	function perform_schema_changes($schema_changes)
+	{
+		if (empty($schema_changes))
+		{
+			return;
+		}
+
+		$statements = array();
+		$sqlite = false;
+
+		// For SQLite we need to perform the schema changes in a much more different way
+		if ($this->db->get_sql_layer() == 'sqlite3' && $this->return_statements)
+		{
+			$sqlite_data = array();
+			$sqlite = true;
+		}
+
+		// Drop tables?
+		if (!empty($schema_changes['drop_tables']))
+		{
+			foreach ($schema_changes['drop_tables'] as $table)
+			{
+				// only drop table if it exists
+				if ($this->sql_table_exists($table))
+				{
+					$result = $this->sql_table_drop($table);
+					if ($this->return_statements)
+					{
+						$statements = array_merge($statements, $result);
+					}
+				}
+			}
+		}
+
+		// Add tables?
+		if (!empty($schema_changes['add_tables']))
+		{
+			foreach ($schema_changes['add_tables'] as $table => $table_data)
+			{
+				$result = $this->sql_create_table($table, $table_data);
+				if ($this->return_statements)
+				{
+					$statements = array_merge($statements, $result);
+				}
+			}
+		}
+
+		// Change columns?
+		if (!empty($schema_changes['change_columns']))
+		{
+			foreach ($schema_changes['change_columns'] as $table => $columns)
+			{
+				foreach ($columns as $column_name => $column_data)
+				{
+					// If the column exists we change it, else we add it ;)
+					if ($column_exists = $this->sql_column_exists($table, $column_name))
+					{
+						$result = $this->sql_column_change($table, $column_name, $column_data, true);
+					}
+					else
+					{
+						$result = $this->sql_column_add($table, $column_name, $column_data, true);
+					}
+
+					if ($sqlite)
+					{
+						if ($column_exists)
+						{
+							$sqlite_data[$table]['change_columns'][] = $result;
+						}
+						else
+						{
+							$sqlite_data[$table]['add_columns'][] = $result;
+						}
+					}
+					else if ($this->return_statements)
+					{
+						$statements = array_merge($statements, $result);
+					}
+				}
+			}
+		}
+
+		// Add columns?
+		if (!empty($schema_changes['add_columns']))
+		{
+			foreach ($schema_changes['add_columns'] as $table => $columns)
+			{
+				foreach ($columns as $column_name => $column_data)
+				{
+					// Only add the column if it does not exist yet
+					if ($column_exists = $this->sql_column_exists($table, $column_name))
+					{
+						continue;
+						// This is commented out here because it can take tremendous time on updates
+//						$result = $this->sql_column_change($table, $column_name, $column_data, true);
+					}
+					else
+					{
+						$result = $this->sql_column_add($table, $column_name, $column_data, true);
+					}
+
+					if ($sqlite)
+					{
+						if ($column_exists)
+						{
+							continue;
+//							$sqlite_data[$table]['change_columns'][] = $result;
+						}
+						else
+						{
+							$sqlite_data[$table]['add_columns'][] = $result;
+						}
+					}
+					else if ($this->return_statements)
+					{
+						$statements = array_merge($statements, $result);
+					}
+				}
+			}
+		}
+
+		// Remove keys?
+		if (!empty($schema_changes['drop_keys']))
+		{
+			foreach ($schema_changes['drop_keys'] as $table => $indexes)
+			{
+				foreach ($indexes as $index_name)
+				{
+					if (!$this->sql_index_exists($table, $index_name) && !$this->sql_unique_index_exists($table, $index_name))
+					{
+						continue;
+					}
+
+					$result = $this->sql_index_drop($table, $index_name);
+
+					if ($this->return_statements)
+					{
+						$statements = array_merge($statements, $result);
+					}
+				}
+			}
+		}
+
+		// Drop columns?
+		if (!empty($schema_changes['drop_columns']))
+		{
+			foreach ($schema_changes['drop_columns'] as $table => $columns)
+			{
+				foreach ($columns as $column)
+				{
+					// Only remove the column if it exists...
+					if ($this->sql_column_exists($table, $column))
+					{
+						$result = $this->sql_column_remove($table, $column, true);
+
+						if ($sqlite)
+						{
+							$sqlite_data[$table]['drop_columns'][] = $result;
+						}
+						else if ($this->return_statements)
+						{
+							$statements = array_merge($statements, $result);
+						}
+					}
+				}
+			}
+		}
+
+		// Add primary keys?
+		if (!empty($schema_changes['add_primary_keys']))
+		{
+			foreach ($schema_changes['add_primary_keys'] as $table => $columns)
+			{
+				$result = $this->sql_create_primary_key($table, $columns, true);
+
+				if ($sqlite)
+				{
+					$sqlite_data[$table]['primary_key'] = $result;
+				}
+				else if ($this->return_statements)
+				{
+					$statements = array_merge($statements, $result);
+				}
+			}
+		}
+
+		// Add unique indexes?
+		if (!empty($schema_changes['add_unique_index']))
+		{
+			foreach ($schema_changes['add_unique_index'] as $table => $index_array)
+			{
+				foreach ($index_array as $index_name => $column)
+				{
+					if ($this->sql_unique_index_exists($table, $index_name))
+					{
+						continue;
+					}
+
+					$result = $this->sql_create_unique_index($table, $index_name, $column);
+
+					if ($this->return_statements)
+					{
+						$statements = array_merge($statements, $result);
+					}
+				}
+			}
+		}
+
+		// Add indexes?
+		if (!empty($schema_changes['add_index']))
+		{
+			foreach ($schema_changes['add_index'] as $table => $index_array)
+			{
+				foreach ($index_array as $index_name => $column)
+				{
+					if ($this->sql_index_exists($table, $index_name))
+					{
+						continue;
+					}
+
+					$result = $this->sql_create_index($table, $index_name, $column);
+
+					if ($this->return_statements)
+					{
+						$statements = array_merge($statements, $result);
+					}
+				}
+			}
+		}
+
+		if ($sqlite)
+		{
+			foreach ($sqlite_data as $table_name => $sql_schema_changes)
+			{
+				// Create temporary table with original data
+				$statements[] = 'begin';
+
+				$sql = "SELECT sql
+					FROM sqlite_master
+					WHERE type = 'table'
+						AND name = '{$table_name}'
+					ORDER BY type DESC, name;";
+				$result = $this->db->sql_query($sql);
+
+				if (!$result)
+				{
+					continue;
+				}
+
+				$row = $this->db->sql_fetchrow($result);
+				$this->db->sql_freeresult($result);
+
+				// Create a backup table and populate it, destroy the existing one
+				$statements[] = preg_replace('#CREATE\s+TABLE\s+"?' . $table_name . '"?#i', 'CREATE TEMPORARY TABLE ' . $table_name . '_temp', $row['sql']);
+				$statements[] = 'INSERT INTO ' . $table_name . '_temp SELECT * FROM ' . $table_name;
+				$statements[] = 'DROP TABLE ' . $table_name;
+
+				// Get the columns...
+				preg_match('#\((.*)\)#s', $row['sql'], $matches);
+
+				$plain_table_cols = trim($matches[1]);
+				$new_table_cols = preg_split('/,(?![\s\w]+\))/m', $plain_table_cols);
+				$column_list = array();
+
+				foreach ($new_table_cols as $declaration)
+				{
+					$entities = preg_split('#\s+#', trim($declaration));
+					if ($entities[0] == 'PRIMARY')
+					{
+						continue;
+					}
+					$column_list[] = $entities[0];
+				}
+
+				// note down the primary key notation because sqlite only supports adding it to the end for the new table
+				$primary_key = false;
+				$_new_cols = array();
+
+				foreach ($new_table_cols as $key => $declaration)
+				{
+					$entities = preg_split('#\s+#', trim($declaration));
+					if ($entities[0] == 'PRIMARY')
+					{
+						$primary_key = $declaration;
+						continue;
+					}
+					$_new_cols[] = $declaration;
+				}
+
+				$new_table_cols = $_new_cols;
+
+				// First of all... change columns
+				if (!empty($sql_schema_changes['change_columns']))
+				{
+					foreach ($sql_schema_changes['change_columns'] as $column_sql)
+					{
+						foreach ($new_table_cols as $key => $declaration)
+						{
+							$entities = preg_split('#\s+#', trim($declaration));
+							if (strpos($column_sql, $entities[0] . ' ') === 0)
+							{
+								$new_table_cols[$key] = $column_sql;
+							}
+						}
+					}
+				}
+
+				if (!empty($sql_schema_changes['add_columns']))
+				{
+					foreach ($sql_schema_changes['add_columns'] as $column_sql)
+					{
+						$new_table_cols[] = $column_sql;
+					}
+				}
+
+				// Now drop them...
+				if (!empty($sql_schema_changes['drop_columns']))
+				{
+					foreach ($sql_schema_changes['drop_columns'] as $column_name)
+					{
+						// Remove from column list...
+						$new_column_list = array();
+						foreach ($column_list as $key => $value)
+						{
+							if ($value === $column_name)
+							{
+								continue;
+							}
+
+							$new_column_list[] = $value;
+						}
+
+						$column_list = $new_column_list;
+
+						// Remove from table...
+						$_new_cols = array();
+						foreach ($new_table_cols as $key => $declaration)
+						{
+							$entities = preg_split('#\s+#', trim($declaration));
+							if (strpos($column_name . ' ', $entities[0] . ' ') === 0)
+							{
+								continue;
+							}
+							$_new_cols[] = $declaration;
+						}
+						$new_table_cols = $_new_cols;
+					}
+				}
+
+				// Primary key...
+				if (!empty($sql_schema_changes['primary_key']))
+				{
+					$new_table_cols[] = 'PRIMARY KEY (' . implode(', ', $sql_schema_changes['primary_key']) . ')';
+				}
+				// Add a new one or the old primary key
+				else if ($primary_key !== false)
+				{
+					$new_table_cols[] = $primary_key;
+				}
+
+				$columns = implode(',', $column_list);
+
+				// create a new table and fill it up. destroy the temp one
+				$statements[] = 'CREATE TABLE ' . $table_name . ' (' . implode(',', $new_table_cols) . ');';
+				$statements[] = 'INSERT INTO ' . $table_name . ' (' . $columns . ') SELECT ' . $columns . ' FROM ' . $table_name . '_temp;';
+				$statements[] = 'DROP TABLE ' . $table_name . '_temp';
+
+				$statements[] = 'commit';
+			}
+		}
+
+		if ($this->return_statements)
+		{
+			return $statements;
+		}
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	function sql_list_columns($table_name)
+	{
+		$columns = array();
+
+		switch ($this->sql_layer)
+		{
+			case 'mysql_40':
+			case 'mysql_41':
+				$sql = "SHOW COLUMNS FROM $table_name";
+			break;
+
+			case 'oracle':
+				$sql = "SELECT column_name
+					FROM user_tab_columns
+					WHERE LOWER(table_name) = '" . strtolower($table_name) . "'";
+			break;
+
+			case 'sqlite3':
+				$sql = "SELECT sql
+					FROM sqlite_master
+					WHERE type = 'table'
+						AND name = '{$table_name}'";
+
+				$result = $this->db->sql_query($sql);
+
+				if (!$result)
+				{
+					return false;
+				}
+
+				$row = $this->db->sql_fetchrow($result);
+				$this->db->sql_freeresult($result);
+
+				preg_match('#\((.*)\)#s', $row['sql'], $matches);
+
+				$cols = trim($matches[1]);
+				$col_array = preg_split('/,(?![\s\w]+\))/m', $cols);
+
+				foreach ($col_array as $declaration)
+				{
+					$entities = preg_split('#\s+#', trim($declaration));
+					if ($entities[0] == 'PRIMARY')
+					{
+						continue;
+					}
+
+					$column = strtolower($entities[0]);
+					$columns[$column] = $column;
+				}
+
+				return $columns;
+			break;
+		}
+
+		$result = $this->db->sql_query($sql);
+
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			$column = strtolower(current($row));
+			$columns[$column] = $column;
+		}
+		$this->db->sql_freeresult($result);
+
+		return $columns;
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	function sql_column_exists($table_name, $column_name)
+	{
+		$columns = $this->sql_list_columns($table_name);
+
+		return isset($columns[$column_name]);
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	function sql_index_exists($table_name, $index_name)
+	{
+		switch ($this->sql_layer)
+		{
+			case 'mysql_40':
+			case 'mysql_41':
+				$sql = 'SHOW KEYS
+					FROM ' . $table_name;
+				$col = 'Key_name';
+			break;
+
+			case 'oracle':
+				$sql = "SELECT index_name
+					FROM user_indexes
+					WHERE table_name = '" . strtoupper($table_name) . "'
+						AND generated = 'N'
+						AND uniqueness = 'NONUNIQUE'";
+				$col = 'index_name';
+			break;
+
+			case 'sqlite3':
+				$sql = "PRAGMA index_list('" . $table_name . "');";
+				$col = 'name';
+			break;
+		}
+
+		$result = $this->db->sql_query($sql);
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			if (($this->sql_layer == 'mysql_40' || $this->sql_layer == 'mysql_41') && !$row['Non_unique'])
+			{
+				continue;
+			}
+
+			switch ($this->sql_layer)
+			{
+				// These DBMS prefix index name with the table name
+				case 'oracle':
+				case 'sqlite3':
+					$new_index_name = $this->check_index_name_length($table_name, $table_name . '_' . $index_name, false);
+				break;
+				default:
+					$new_index_name = $this->check_index_name_length($table_name, $index_name, false);
+				break;
+			}
+
+			if (strtolower($row[$col]) == strtolower($new_index_name))
+			{
+				$this->db->sql_freeresult($result);
+				return true;
+			}
+		}
+		$this->db->sql_freeresult($result);
+
+		return false;
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	function sql_unique_index_exists($table_name, $index_name)
+	{
+		switch ($this->sql_layer)
+		{
+			case 'mysql_40':
+			case 'mysql_41':
+				$sql = 'SHOW KEYS
+					FROM ' . $table_name;
+				$col = 'Key_name';
+			break;
+
+			case 'oracle':
+				$sql = "SELECT index_name, table_owner
+					FROM user_indexes
+					WHERE table_name = '" . strtoupper($table_name) . "'
+						AND generated = 'N'
+						AND uniqueness = 'UNIQUE'";
+				$col = 'index_name';
+			break;
+
+			case 'sqlite3':
+				$sql = "PRAGMA index_list('" . $table_name . "');";
+				$col = 'name';
+			break;
+		}
+
+		$result = $this->db->sql_query($sql);
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			if (($this->sql_layer == 'mysql_40' || $this->sql_layer == 'mysql_41') && ($row['Non_unique'] || $row[$col] == 'PRIMARY'))
+			{
+				continue;
+			}
+
+			if ($this->sql_layer == 'sqlite3' && !$row['unique'])
+			{
+				continue;
+			}
+
+			// These DBMS prefix index name with the table name
+			switch ($this->sql_layer)
+			{
+				case 'oracle':
+					// Two cases here... prefixed with U_[table_owner] and not prefixed with table_name
+					if (strpos($row[$col], 'U_') === 0)
+					{
+						$row[$col] = substr($row[$col], strlen('U_' . $row['table_owner']) + 1);
+					}
+					else if (strpos($row[$col], strtoupper($table_name)) === 0)
+					{
+						$row[$col] = substr($row[$col], strlen($table_name) + 1);
+					}
+				break;
+
+				case 'sqlite3':
+					$row[$col] = substr($row[$col], strlen($table_name) + 1);
+				break;
+			}
+
+			if (strtolower($row[$col]) == strtolower($index_name))
+			{
+				$this->db->sql_freeresult($result);
+				return true;
+			}
+		}
+		$this->db->sql_freeresult($result);
+
+		return false;
+	}
+
+	/**
+	* Private method for performing sql statements (either execute them or return them)
+	* @access private
+	*/
+	function _sql_run_sql($statements)
+	{
+		if ($this->return_statements)
+		{
+			return $statements;
+		}
+
+		// We could add error handling here...
+		foreach ($statements as $sql)
+		{
+			if ($sql === 'begin')
+			{
+				$this->db->sql_transaction('begin');
+			}
+			else if ($sql === 'commit')
+			{
+				$this->db->sql_transaction('commit');
+			}
+			else
+			{
+				$this->db->sql_query($sql);
+			}
+		}
+
+		return true;
+	}
+
+	/**
+	* Function to prepare some column information for better usage
+	* @access private
+	*/
+	function sql_prepare_column_data($table_name, $column_name, $column_data)
+	{
+		if (strlen($column_name) > 30)
+		{
+			trigger_error("Column name '$column_name' on table '$table_name' is too long. The maximum is 30 characters.", E_USER_ERROR);
+		}
+
+		// Get type
+		list($column_type) = $this->get_column_type($column_data[0]);
+
+		// Adjust default value if db-dependent specified
+		if (is_array($column_data[1]))
+		{
+			$column_data[1] = (isset($column_data[1][$this->sql_layer])) ? $column_data[1][$this->sql_layer] : $column_data[1]['default'];
+		}
+
+		$sql = '';
+
+		$return_array = array();
+
+		switch ($this->sql_layer)
+		{
+			case 'mysql_40':
+			case 'mysql_41':
+				$sql .= " {$column_type} ";
+
+				// For hexadecimal values do not use single quotes
+				if (!is_null($column_data[1]) && substr($column_type, -4) !== 'text' && substr($column_type, -4) !== 'blob')
+				{
+					$sql .= (strpos($column_data[1], '0x') === 0) ? "DEFAULT {$column_data[1]} " : "DEFAULT '{$column_data[1]}' ";
+				}
+
+				if (!is_null($column_data[1]) || (isset($column_data[2]) && $column_data[2] == 'auto_increment'))
+				{
+					$sql .= 'NOT NULL';
+				}
+				else
+				{
+					$sql .= 'NULL';
+				}
+
+				if (isset($column_data[2]))
+				{
+					if ($column_data[2] == 'auto_increment')
+					{
+						$sql .= ' auto_increment';
+					}
+					else if ($this->sql_layer === 'mysql_41' && $column_data[2] == 'true_sort')
+					{
+						$sql .= ' COLLATE utf8_unicode_ci';
+					}
+				}
+
+				if (isset($column_data['after']))
+				{
+					$return_array['after'] = $column_data['after'];
+				}
+
+			break;
+
+			case 'oracle':
+				$sql .= " {$column_type} ";
+				$sql .= (!is_null($column_data[1])) ? "DEFAULT '{$column_data[1]}' " : '';
+
+				// In Oracle empty strings ('') are treated as NULL.
+				// Therefore in oracle we allow NULL's for all DEFAULT '' entries
+				// Oracle does not like setting NOT NULL on a column that is already NOT NULL (this happens only on number fields)
+				if (!preg_match('/number/i', $column_type))
+				{
+					$sql .= ($column_data[1] === '' || $column_data[1] === null) ? '' : 'NOT NULL';
+				}
+
+				$return_array['auto_increment'] = false;
+				if (isset($column_data[2]) && $column_data[2] == 'auto_increment')
+				{
+					$return_array['auto_increment'] = true;
+				}
+
+			break;
+
+			case 'sqlite3':
+				$return_array['primary_key_set'] = false;
+				if (isset($column_data[2]) && $column_data[2] == 'auto_increment')
+				{
+					$sql .= ' INTEGER PRIMARY KEY AUTOINCREMENT';
+					$return_array['primary_key_set'] = true;
+				}
+				else
+				{
+					$sql .= ' ' . $column_type;
+				}
+
+				if (!is_null($column_data[1]))
+				{
+					$sql .= ' NOT NULL ';
+					$sql .= "DEFAULT '{$column_data[1]}'";
+				}
+
+			break;
+		}
+
+		$return_array['column_type_sql'] = $sql;
+
+		return $return_array;
+	}
+
+	/**
+	* Get the column's database type from the type map
+	*
+	* @param string $column_map_type
+	* @return array		column type for this database
+	*					and map type without length
+	*/
+	function get_column_type($column_map_type)
+	{
+		$column_type = '';
+		if (strpos($column_map_type, ':') !== false)
+		{
+			list($orig_column_type, $column_length) = explode(':', $column_map_type);
+			if (!is_array($this->dbms_type_map[$this->sql_layer][$orig_column_type . ':']))
+			{
+				$column_type = sprintf($this->dbms_type_map[$this->sql_layer][$orig_column_type . ':'], $column_length);
+			}
+			else
+			{
+				if (isset($this->dbms_type_map[$this->sql_layer][$orig_column_type . ':']['rule']))
+				{
+					switch ($this->dbms_type_map[$this->sql_layer][$orig_column_type . ':']['rule'][0])
+					{
+						case 'div':
+							$column_length /= $this->dbms_type_map[$this->sql_layer][$orig_column_type . ':']['rule'][1];
+							$column_length = ceil($column_length);
+							$column_type = sprintf($this->dbms_type_map[$this->sql_layer][$orig_column_type . ':'][0], $column_length);
+						break;
+					}
+				}
+
+				if (isset($this->dbms_type_map[$this->sql_layer][$orig_column_type . ':']['limit']))
+				{
+					switch ($this->dbms_type_map[$this->sql_layer][$orig_column_type . ':']['limit'][0])
+					{
+						case 'mult':
+							$column_length *= $this->dbms_type_map[$this->sql_layer][$orig_column_type . ':']['limit'][1];
+							if ($column_length > $this->dbms_type_map[$this->sql_layer][$orig_column_type . ':']['limit'][2])
+							{
+								$column_type = $this->dbms_type_map[$this->sql_layer][$orig_column_type . ':']['limit'][3];
+							}
+							else
+							{
+								$column_type = sprintf($this->dbms_type_map[$this->sql_layer][$orig_column_type . ':'][0], $column_length);
+							}
+						break;
+					}
+				}
+			}
+			$orig_column_type .= ':';
+		}
+		else
+		{
+			$orig_column_type = $column_map_type;
+			$column_type = $this->dbms_type_map[$this->sql_layer][$column_map_type];
+		}
+
+		return array($column_type, $orig_column_type);
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	function sql_column_add($table_name, $column_name, $column_data, $inline = false)
+	{
+		$column_data = $this->sql_prepare_column_data($table_name, $column_name, $column_data);
+		$statements = array();
+
+		switch ($this->sql_layer)
+		{
+			case 'mysql_40':
+			case 'mysql_41':
+				$after = (!empty($column_data['after'])) ? ' AFTER ' . $column_data['after'] : '';
+				$statements[] = 'ALTER TABLE `' . $table_name . '` ADD COLUMN `' . $column_name . '` ' . $column_data['column_type_sql'] . $after;
+			break;
+
+			case 'oracle':
+				// Does not support AFTER, only through temporary table
+				$statements[] = 'ALTER TABLE ' . $table_name . ' ADD ' . $column_name . ' ' . $column_data['column_type_sql'];
+			break;
+
+			case 'sqlite3':
+				if ($inline && $this->return_statements)
+				{
+					return $column_name . ' ' . $column_data['column_type_sql'];
+				}
+
+				$statements[] = 'ALTER TABLE ' . $table_name . ' ADD ' . $column_name . ' ' . $column_data['column_type_sql'];
+			break;
+		}
+
+		return $this->_sql_run_sql($statements);
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	function sql_column_remove($table_name, $column_name, $inline = false)
+	{
+		$statements = array();
+
+		switch ($this->sql_layer)
+		{
+			case 'mysql_40':
+			case 'mysql_41':
+				$statements[] = 'ALTER TABLE `' . $table_name . '` DROP COLUMN `' . $column_name . '`';
+			break;
+
+			case 'oracle':
+				$statements[] = 'ALTER TABLE ' . $table_name . ' DROP COLUMN ' . $column_name;
+			break;
+
+			case 'sqlite3':
+
+				if ($inline && $this->return_statements)
+				{
+					return $column_name;
+				}
+
+				$recreate_queries = $this->sqlite_get_recreate_table_queries($table_name, $column_name);
+				if (empty($recreate_queries))
+				{
+					break;
+				}
+
+				$statements[] = 'begin';
+
+				$sql_create_table = array_shift($recreate_queries);
+
+				// Create a backup table and populate it, destroy the existing one
+				$statements[] = preg_replace('#CREATE\s+TABLE\s+"?' . $table_name . '"?#i', 'CREATE TEMPORARY TABLE ' . $table_name . '_temp', $sql_create_table);
+				$statements[] = 'INSERT INTO ' . $table_name . '_temp SELECT * FROM ' . $table_name;
+				$statements[] = 'DROP TABLE ' . $table_name;
+
+				preg_match('#\((.*)\)#s', $sql_create_table, $matches);
+
+				$new_table_cols = trim($matches[1]);
+				$old_table_cols = preg_split('/,(?![\s\w]+\))/m', $new_table_cols);
+				$column_list = array();
+
+				foreach ($old_table_cols as $declaration)
+				{
+					$entities = preg_split('#\s+#', trim($declaration));
+					if ($entities[0] == 'PRIMARY' || $entities[0] === $column_name)
+					{
+						continue;
+					}
+					$column_list[] = $entities[0];
+				}
+
+				$columns = implode(',', $column_list);
+
+				$new_table_cols = trim(preg_replace('/' . $column_name . '\b[^,]+(?:,|$)/m', '', $new_table_cols));
+				if (substr($new_table_cols, -1) === ',')
+				{
+					// Remove the comma from the last entry again
+					$new_table_cols = substr($new_table_cols, 0, -1);
+				}
+
+				// create a new table and fill it up. destroy the temp one
+				$statements[] = 'CREATE TABLE ' . $table_name . ' (' . $new_table_cols . ');';
+				$statements = array_merge($statements, $recreate_queries);
+
+				$statements[] = 'INSERT INTO ' . $table_name . ' (' . $columns . ') SELECT ' . $columns . ' FROM ' . $table_name . '_temp;';
+				$statements[] = 'DROP TABLE ' . $table_name . '_temp';
+
+				$statements[] = 'commit';
+			break;
+		}
+
+		return $this->_sql_run_sql($statements);
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	function sql_index_drop($table_name, $index_name)
+	{
+		$statements = array();
+
+		switch ($this->sql_layer)
+		{
+			case 'mysql_40':
+			case 'mysql_41':
+				$index_name = $this->check_index_name_length($table_name, $index_name, false);
+				$statements[] = 'DROP INDEX ' . $index_name . ' ON ' . $table_name;
+			break;
+
+			case 'oracle':
+			case 'sqlite3':
+				$index_name = $this->check_index_name_length($table_name, $table_name . '_' . $index_name, false);
+				$statements[] = 'DROP INDEX ' . $index_name;
+			break;
+		}
+
+		return $this->_sql_run_sql($statements);
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	function sql_table_drop($table_name)
+	{
+		$statements = array();
+
+		if (!$this->sql_table_exists($table_name))
+		{
+			return $this->_sql_run_sql($statements);
+		}
+
+		// the most basic operation, get rid of the table
+		$statements[] = 'DROP TABLE ' . $table_name;
+
+		switch ($this->sql_layer)
+		{
+			case 'oracle':
+				$sql = 'SELECT A.REFERENCED_NAME
+					FROM USER_DEPENDENCIES A, USER_TRIGGERS B
+					WHERE A.REFERENCED_TYPE = \'SEQUENCE\'
+						AND A.NAME = B.TRIGGER_NAME
+						AND B.TABLE_NAME = \'' . strtoupper($table_name) . "'";
+				$result = $this->db->sql_query($sql);
+
+				// any sequences ref'd to this table's triggers?
+				while ($row = $this->db->sql_fetchrow($result))
+				{
+					$statements[] = "DROP SEQUENCE {$row['referenced_name']}";
+				}
+				$this->db->sql_freeresult($result);
+			break;
+		}
+
+		return $this->_sql_run_sql($statements);
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	function sql_create_primary_key($table_name, $column, $inline = false)
+	{
+		$statements = array();
+
+		switch ($this->sql_layer)
+		{
+			case 'mysql_40':
+			case 'mysql_41':
+				$statements[] = 'ALTER TABLE ' . $table_name . ' ADD PRIMARY KEY (' . implode(', ', $column) . ')';
+			break;
+
+			case 'oracle':
+				$statements[] = 'ALTER TABLE ' . $table_name . ' add CONSTRAINT pk_' . $table_name . ' PRIMARY KEY (' . implode(', ', $column) . ')';
+			break;
+
+			case 'sqlite3':
+
+				if ($inline && $this->return_statements)
+				{
+					return $column;
+				}
+
+				$recreate_queries = $this->sqlite_get_recreate_table_queries($table_name);
+				if (empty($recreate_queries))
+				{
+					break;
+				}
+
+				$statements[] = 'begin';
+
+				$sql_create_table = array_shift($recreate_queries);
+
+				// Create a backup table and populate it, destroy the existing one
+				$statements[] = preg_replace('#CREATE\s+TABLE\s+"?' . $table_name . '"?#i', 'CREATE TEMPORARY TABLE ' . $table_name . '_temp', $sql_create_table);
+				$statements[] = 'INSERT INTO ' . $table_name . '_temp SELECT * FROM ' . $table_name;
+				$statements[] = 'DROP TABLE ' . $table_name;
+
+				preg_match('#\((.*)\)#s', $sql_create_table, $matches);
+
+				$new_table_cols = trim($matches[1]);
+				$old_table_cols = preg_split('/,(?![\s\w]+\))/m', $new_table_cols);
+				$column_list = array();
+
+				foreach ($old_table_cols as $declaration)
+				{
+					$entities = preg_split('#\s+#', trim($declaration));
+					if ($entities[0] == 'PRIMARY')
+					{
+						continue;
+					}
+					$column_list[] = $entities[0];
+				}
+
+				$columns = implode(',', $column_list);
+
+				// create a new table and fill it up. destroy the temp one
+				$statements[] = 'CREATE TABLE ' . $table_name . ' (' . $new_table_cols . ', PRIMARY KEY (' . implode(', ', $column) . '));';
+				$statements = array_merge($statements, $recreate_queries);
+
+				$statements[] = 'INSERT INTO ' . $table_name . ' (' . $columns . ') SELECT ' . $columns . ' FROM ' . $table_name . '_temp;';
+				$statements[] = 'DROP TABLE ' . $table_name . '_temp';
+
+				$statements[] = 'commit';
+			break;
+		}
+
+		return $this->_sql_run_sql($statements);
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	function sql_create_unique_index($table_name, $index_name, $column)
+	{
+		$statements = array();
+
+		switch ($this->sql_layer)
+		{
+			case 'oracle':
+			case 'sqlite3':
+				$index_name = $this->check_index_name_length($table_name, $table_name . '_' . $index_name);
+				$statements[] = 'CREATE UNIQUE INDEX ' . $index_name . ' ON ' . $table_name . '(' . implode(', ', $column) . ')';
+			break;
+
+			case 'mysql_40':
+			case 'mysql_41':
+				$index_name = $this->check_index_name_length($table_name, $index_name);
+				$statements[] = 'ALTER TABLE ' . $table_name . ' ADD UNIQUE INDEX ' . $index_name . '(' . implode(', ', $column) . ')';
+			break;
+		}
+
+		return $this->_sql_run_sql($statements);
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	function sql_create_index($table_name, $index_name, $column)
+	{
+		$statements = array();
+
+		// remove index length unless MySQL4
+		if ('mysql_40' != $this->sql_layer)
+		{
+			$column = preg_replace('#:.*$#', '', $column);
+		}
+
+		switch ($this->sql_layer)
+		{
+			case 'oracle':
+			case 'sqlite3':
+				$index_name = $this->check_index_name_length($table_name, $table_name . '_' . $index_name);
+				$statements[] = 'CREATE INDEX ' . $index_name . ' ON ' . $table_name . '(' . implode(', ', $column) . ')';
+			break;
+
+			case 'mysql_40':
+				// add index size to definition as required by MySQL4
+				foreach ($column as $i => $col)
+				{
+					if (false !== strpos($col, ':'))
+					{
+						list($col, $index_size) = explode(':', $col);
+						$column[$i] = "$col($index_size)";
+					}
+				}
+			// no break
+			case 'mysql_41':
+				$index_name = $this->check_index_name_length($table_name, $index_name);
+				$statements[] = 'ALTER TABLE ' . $table_name . ' ADD INDEX ' . $index_name . ' (' . implode(', ', $column) . ')';
+			break;
+		}
+
+		return $this->_sql_run_sql($statements);
+	}
+
+	/**
+	 * Check whether the index name is too long
+	 *
+	 * @param string $table_name
+	 * @param string $index_name
+	 * @param bool $throw_error
+	 * @return string	The index name, shortened if too long
+	 */
+	protected function check_index_name_length($table_name, $index_name, $throw_error = true)
+	{
+		$max_index_name_length = $this->get_max_index_name_length();
+		if (strlen($index_name) > $max_index_name_length)
+		{
+			// Try removing the table prefix if it's at the beginning
+			$table_prefix = substr(CONFIG_TABLE, 0, -6); // strlen(config)
+			if (strpos($index_name, $table_prefix) === 0)
+			{
+				$index_name = substr($index_name, strlen($table_prefix));
+				return $this->check_index_name_length($table_name, $index_name, $throw_error);
+			}
+
+			// Try removing the remaining suffix part of table name then
+			$table_suffix = substr($table_name, strlen($table_prefix));
+			if (strpos($index_name, $table_suffix) === 0)
+			{
+				// Remove the suffix and underscore separator between table_name and index_name
+				$index_name = substr($index_name, strlen($table_suffix) + 1);
+				return $this->check_index_name_length($table_name, $index_name, $throw_error);
+			}
+
+			if ($throw_error)
+			{
+				trigger_error("Index name '$index_name' on table '$table_name' is too long. The maximum is $max_index_name_length characters.", E_USER_ERROR);
+			}
+		}
+
+		return $index_name;
+	}
+
+	/**
+	 * Get maximum index name length. Might vary depending on db type
+	 *
+	 * @return int Maximum index name length
+	 */
+	protected function get_max_index_name_length()
+	{
+		return 30;
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	function sql_list_index($table_name)
+	{
+		$index_array = array();
+
+		switch ($this->sql_layer)
+		{
+			case 'mysql_40':
+			case 'mysql_41':
+				$sql = 'SHOW KEYS
+					FROM ' . $table_name;
+				$col = 'Key_name';
+				break;
+
+			case 'oracle':
+				$sql = "SELECT index_name
+					FROM user_indexes
+					WHERE table_name = '" . strtoupper($table_name) . "'
+						AND generated = 'N'
+						AND uniqueness = 'NONUNIQUE'";
+				$col = 'index_name';
+				break;
+
+			case 'sqlite3':
+				$sql = "PRAGMA index_info('" . $table_name . "');";
+				$col = 'name';
+				break;
+		}
+
+		$result = $this->db->sql_query($sql);
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			if (($this->sql_layer == 'mysql_40' || $this->sql_layer == 'mysql_41') && !$row['Non_unique'])
+			{
+				continue;
+			}
+
+			switch ($this->sql_layer)
+			{
+				case 'oracle':
+				case 'sqlite3':
+					$row[$col] = substr($row[$col], strlen($table_name) + 1);
+					break;
+			}
+
+			$index_array[] = $row[$col];
+		}
+		$this->db->sql_freeresult($result);
+
+		return array_map('strtolower', $index_array);
+	}
+
+	/**
+	 * Removes table_name from the index_name if it is at the beginning
+	 *
+	 * @param $table_name
+	 * @param $index_name
+	 * @return string
+	 */
+	protected function strip_table_name_from_index_name($table_name, $index_name)
+	{
+		return (strpos(strtoupper($index_name), strtoupper($table_name)) === 0) ? substr($index_name, strlen($table_name) + 1) : $index_name;
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	function sql_column_change($table_name, $column_name, $column_data, $inline = false)
+	{
+		$original_column_data = $column_data;
+		$column_data = $this->sql_prepare_column_data($table_name, $column_name, $column_data);
+		$statements = array();
+
+		switch ($this->sql_layer)
+		{
+			case 'mysql_40':
+			case 'mysql_41':
+				$statements[] = 'ALTER TABLE `' . $table_name . '` CHANGE `' . $column_name . '` `' . $column_name . '` ' . $column_data['column_type_sql'];
+			break;
+
+			case 'oracle':
+				// We need the data here
+				$old_return_statements = $this->return_statements;
+				$this->return_statements = true;
+
+				// Get list of existing indexes
+				$indexes = $this->get_existing_indexes($table_name, $column_name);
+				$unique_indexes = $this->get_existing_indexes($table_name, $column_name, true);
+
+				// Drop any indexes
+				if (!empty($indexes) || !empty($unique_indexes))
+				{
+					$drop_indexes = array_merge(array_keys($indexes), array_keys($unique_indexes));
+					foreach ($drop_indexes as $index_name)
+					{
+						$result = $this->sql_index_drop($table_name, $this->strip_table_name_from_index_name($table_name, $index_name));
+						$statements = array_merge($statements, $result);
+					}
+				}
+
+				$temp_column_name = 'temp_' . substr(md5($column_name), 0, 25);
+				// Add a temporary table with the new type
+				$result = $this->sql_column_add($table_name, $temp_column_name, $original_column_data);
+				$statements = array_merge($statements, $result);
+
+				// Copy the data to the new column
+				$statements[] = 'UPDATE ' . $table_name . ' SET ' . $temp_column_name . ' = ' . $column_name;
+
+				// Drop the original column
+				$result = $this->sql_column_remove($table_name, $column_name);
+				$statements = array_merge($statements, $result);
+
+				// Recreate the original column with the new type
+				$result = $this->sql_column_add($table_name, $column_name, $original_column_data);
+				$statements = array_merge($statements, $result);
+
+				if (!empty($indexes))
+				{
+					// Recreate indexes after we changed the column
+					foreach ($indexes as $index_name => $index_data)
+					{
+						$result = $this->sql_create_index($table_name, $this->strip_table_name_from_index_name($table_name, $index_name), $index_data);
+						$statements = array_merge($statements, $result);
+					}
+				}
+
+				if (!empty($unique_indexes))
+				{
+					// Recreate unique indexes after we changed the column
+					foreach ($unique_indexes as $index_name => $index_data)
+					{
+						$result = $this->sql_create_unique_index($table_name, $this->strip_table_name_from_index_name($table_name, $index_name), $index_data);
+						$statements = array_merge($statements, $result);
+					}
+				}
+
+				// Copy the data to the original column
+				$statements[] = 'UPDATE ' . $table_name . ' SET ' . $column_name . ' = ' . $temp_column_name;
+
+				// Drop the temporary column again
+				$result = $this->sql_column_remove($table_name, $temp_column_name);
+				$statements = array_merge($statements, $result);
+
+				$this->return_statements = $old_return_statements;
+			break;
+
+			case 'sqlite3':
+
+				if ($inline && $this->return_statements)
+				{
+					return $column_name . ' ' . $column_data['column_type_sql'];
+				}
+
+				$recreate_queries = $this->sqlite_get_recreate_table_queries($table_name);
+				if (empty($recreate_queries))
+				{
+					break;
+				}
+
+				$statements[] = 'begin';
+
+				$sql_create_table = array_shift($recreate_queries);
+
+				// Create a temp table and populate it, destroy the existing one
+				$statements[] = preg_replace('#CREATE\s+TABLE\s+"?' . $table_name . '"?#i', 'CREATE TEMPORARY TABLE ' . $table_name . '_temp', $sql_create_table);
+				$statements[] = 'INSERT INTO ' . $table_name . '_temp SELECT * FROM ' . $table_name;
+				$statements[] = 'DROP TABLE ' . $table_name;
+
+				preg_match('#\((.*)\)#s', $sql_create_table, $matches);
+
+				$new_table_cols = trim($matches[1]);
+				$old_table_cols = preg_split('/,(?![\s\w]+\))/m', $new_table_cols);
+				$column_list = array();
+
+				foreach ($old_table_cols as $key => $declaration)
+				{
+					$declaration = trim($declaration);
+
+					// Check for the beginning of the constraint section and stop
+					if (preg_match('/[^\(]*\s*PRIMARY KEY\s+\(/', $declaration) ||
+						preg_match('/[^\(]*\s*UNIQUE\s+\(/', $declaration) ||
+						preg_match('/[^\(]*\s*FOREIGN KEY\s+\(/', $declaration) ||
+						preg_match('/[^\(]*\s*CHECK\s+\(/', $declaration))
+					{
+						break;
+					}
+
+					$entities = preg_split('#\s+#', $declaration);
+					$column_list[] = $entities[0];
+					if ($entities[0] == $column_name)
+					{
+						$old_table_cols[$key] = $column_name . ' ' . $column_data['column_type_sql'];
+					}
+				}
+
+				$columns = implode(',', $column_list);
+
+				// Create a new table and fill it up. destroy the temp one
+				$statements[] = 'CREATE TABLE ' . $table_name . ' (' . implode(',', $old_table_cols) . ');';
+				$statements = array_merge($statements, $recreate_queries);
+
+				$statements[] = 'INSERT INTO ' . $table_name . ' (' . $columns . ') SELECT ' . $columns . ' FROM ' . $table_name . '_temp;';
+				$statements[] = 'DROP TABLE ' . $table_name . '_temp';
+
+				$statements[] = 'commit';
+
+			break;
+		}
+
+		return $this->_sql_run_sql($statements);
+	}
+
+	/**
+	* Get a list with existing indexes for the column
+	*
+	* @param string $table_name
+	* @param string $column_name
+	* @param bool $unique Should we get unique indexes or normal ones
+	* @return array		Array with Index name => columns
+	*/
+	public function get_existing_indexes($table_name, $column_name, $unique = false)
+	{
+		switch ($this->sql_layer)
+		{
+			case 'mysql_40':
+			case 'mysql_41':
+			case 'sqlite3':
+				// Not supported
+				throw new \Exception('DBMS is not supported');
+			break;
+		}
+
+		$sql = '';
+		$existing_indexes = array();
+
+		switch ($this->sql_layer)
+		{
+			case 'oracle':
+				$sql = "SELECT ix.index_name  AS phpbb_index_name, ix.uniqueness AS is_unique
+					FROM all_ind_columns ixc, all_indexes ix
+					WHERE ix.index_name = ixc.index_name
+						AND ixc.table_name = '" . strtoupper($table_name) . "'
+						AND ixc.column_name = '" . strtoupper($column_name) . "'";
+			break;
+		}
+
+		$result = $this->db->sql_query($sql);
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			if (!isset($row['is_unique']) || ($unique && $row['is_unique'] == 'UNIQUE') || (!$unique && $row['is_unique'] == 'NONUNIQUE'))
+			{
+				$existing_indexes[$row['phpbb_index_name']] = array();
+			}
+		}
+		$this->db->sql_freeresult($result);
+
+		if (empty($existing_indexes))
+		{
+			return array();
+		}
+
+		switch ($this->sql_layer)
+		{
+			case 'oracle':
+				$sql = "SELECT index_name AS phpbb_index_name, column_name AS phpbb_column_name
+					FROM all_ind_columns
+					WHERE table_name = '" . strtoupper($table_name) . "'
+						AND " . $this->db->sql_in_set('index_name', array_keys($existing_indexes));
+			break;
+		}
+
+		$result = $this->db->sql_query($sql);
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			$existing_indexes[$row['phpbb_index_name']][] = $row['phpbb_column_name'];
+		}
+		$this->db->sql_freeresult($result);
+
+		return $existing_indexes;
+	}
+
+	/**
+	* Returns the Queries which are required to recreate a table including indexes
+	*
+	* @param string $table_name
+	* @param string $remove_column	When we drop a column, we remove the column
+	*								from all indexes. If the index has no other
+	*								column, we drop it completly.
+	* @return array
+	*/
+	protected function sqlite_get_recreate_table_queries($table_name, $remove_column = '')
+	{
+		$queries = array();
+
+		$sql = "SELECT sql
+			FROM sqlite_master
+			WHERE type = 'table'
+				AND name = '{$table_name}'";
+		$result = $this->db->sql_query($sql);
+		$sql_create_table = $this->db->sql_fetchfield('sql');
+		$this->db->sql_freeresult($result);
+
+		if (!$sql_create_table)
+		{
+			return array();
+		}
+		$queries[] = $sql_create_table;
+
+		$sql = "SELECT sql
+			FROM sqlite_master
+			WHERE type = 'index'
+				AND tbl_name = '{$table_name}'";
+		$result = $this->db->sql_query($sql);
+		while ($sql_create_index = $this->db->sql_fetchfield('sql'))
+		{
+			if ($remove_column)
+			{
+				$match = array();
+				preg_match('#(?:[\w ]+)\((.*)\)#', $sql_create_index, $match);
+				if (!isset($match[1]))
+				{
+					continue;
+				}
+
+				// Find and remove $remove_column from the index
+				$columns = explode(', ', $match[1]);
+				$found_column = array_search($remove_column, $columns);
+				if ($found_column !== false)
+				{
+					unset($columns[$found_column]);
+
+					// If the column list is not empty add the index to the list
+					if (!empty($columns))
+					{
+						$queries[] = str_replace($match[1], implode(', ', $columns), $sql_create_index);
+					}
+				}
+				else
+				{
+					$queries[] = $sql_create_index;
+				}
+			}
+			else
+			{
+				$queries[] = $sql_create_index;
+			}
+		}
+		$this->db->sql_freeresult($result);
+
+		return $queries;
+	}
+}
diff --git a/phpBB/phpbb/db/tools/tools_interface.php b/phpBB/phpbb/db/tools/tools_interface.php
new file mode 100644
index 0000000000..f153f73a54
--- /dev/null
+++ b/phpBB/phpbb/db/tools/tools_interface.php
@@ -0,0 +1,202 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\tools;
+
+/**
+ * Interface for a Database Tools for handling cross-db actions such as altering columns, etc.
+ */
+interface tools_interface
+{
+	/**
+	 * Handle passed database update array.
+	 * Expected structure...
+	 * Key being one of the following
+	 *	drop_tables: Drop tables
+	 *	add_tables: Add tables
+	 *	change_columns: Column changes (only type, not name)
+	 *	add_columns: Add columns to a table
+	 *	drop_keys: Dropping keys
+	 *	drop_columns: Removing/Dropping columns
+	 *	add_primary_keys: adding primary keys
+	 *	add_unique_index: adding an unique index
+	 *	add_index: adding an index (can be column:index_size if you need to provide size)
+	 *
+	 * The values are in this format:
+	 *		{TABLE NAME}		=> array(
+	 *			{COLUMN NAME}		=> array({COLUMN TYPE}, {DEFAULT VALUE}, {OPTIONAL VARIABLES}),
+	 *			{KEY/INDEX NAME}	=> array({COLUMN NAMES}),
+	 *		)
+	 *
+	 *
+	 * @param array $schema_changes
+	 * @return null
+	 */
+	public function perform_schema_changes($schema_changes);
+
+	/**
+	 * Gets a list of tables in the database.
+	 *
+	 * @return array		Array of table names  (all lower case)
+	 */
+	public function sql_list_tables();
+
+	/**
+	 * Check if table exists
+	 *
+	 * @param string	$table_name	The table name to check for
+	 * @return bool true if table exists, else false
+	 */
+	public function sql_table_exists($table_name);
+
+	/**
+	 * Create SQL Table
+	 *
+	 * @param string	$table_name		The table name to create
+	 * @param array		$table_data		Array containing table data.
+	 * @return array|true	Statements to run, or true if the statements have been executed
+	 */
+	public function sql_create_table($table_name, $table_data);
+
+	/**
+	 * Drop Table
+	 *
+	 * @param string	$table_name		The table name to drop
+	 * @return array|true	Statements to run, or true if the statements have been executed
+	 */
+	public function sql_table_drop($table_name);
+
+	/**
+	 * Gets a list of columns of a table.
+	 *
+	 * @param string $table_name	Table name
+	 * @return array		Array of column names (all lower case)
+	 */
+	public function sql_list_columns($table_name);
+
+	/**
+	 * Check whether a specified column exist in a table
+	 *
+	 * @param string	$table_name		Table to check
+	 * @param string	$column_name	Column to check
+	 * @return bool		True if column exists, false otherwise
+	 */
+	public function sql_column_exists($table_name, $column_name);
+
+	/**
+	 * Add new column
+	 *
+	 * @param string	$table_name		Table to modify
+	 * @param string	$column_name	Name of the column to add
+	 * @param array		$column_data	Column data
+	 * @param bool		$inline			Whether the query should actually be run,
+	 *						or return a string for adding the column
+	 * @return array|true	Statements to run, or true if the statements have been executed
+	 */
+	public function sql_column_add($table_name, $column_name, $column_data, $inline = false);
+
+	/**
+	 * Change column type (not name!)
+	 *
+	 * @param string	$table_name		Table to modify
+	 * @param string	$column_name	Name of the column to modify
+	 * @param array		$column_data	Column data
+	 * @param bool		$inline			Whether the query should actually be run,
+	 *						or return a string for modifying the column
+	 * @return array|true	Statements to run, or true if the statements have been executed
+	 */
+	public function sql_column_change($table_name, $column_name, $column_data, $inline = false);
+
+	/**
+	 * Drop column
+	 *
+	 * @param string	$table_name		Table to modify
+	 * @param string	$column_name	Name of the column to drop
+	 * @param bool		$inline			Whether the query should actually be run,
+	 *						or return a string for deleting the column
+	 * @return array|true	Statements to run, or true if the statements have been executed
+	 */
+	public function sql_column_remove($table_name, $column_name, $inline = false);
+
+	/**
+	 * List all of the indices that belong to a table
+	 *
+	 * NOTE: does not list
+	 * - UNIQUE indices
+	 * - PRIMARY keys
+	 *
+	 * @param string	$table_name		Table to check
+	 * @return array		Array with index names
+	 */
+	public function sql_list_index($table_name);
+
+	/**
+	 * Check if a specified index exists in table. Does not return PRIMARY KEY and UNIQUE indexes.
+	 *
+	 * @param string	$table_name		Table to check the index at
+	 * @param string	$index_name		The index name to check
+	 * @return bool			True if index exists, else false
+	 */
+	public function sql_index_exists($table_name, $index_name);
+
+	/**
+	 * Add index
+	 *
+	 * @param string	$table_name		Table to modify
+	 * @param string	$index_name		Name of the index to create
+	 * @param string|array	$column		Either a string with a column name, or an array with columns
+	 * @return array|true	Statements to run, or true if the statements have been executed
+	 */
+	public function sql_create_index($table_name, $index_name, $column);
+
+	/**
+	 * Drop Index
+	 *
+	 * @param string	$table_name		Table to modify
+	 * @param string	$index_name		Name of the index to delete
+	 * @return array|true	Statements to run, or true if the statements have been executed
+	 */
+	public function sql_index_drop($table_name, $index_name);
+
+	/**
+	 * Check if a specified index exists in table.
+	 *
+	 * NOTE: Does not return normal and PRIMARY KEY indexes
+	 *
+	 * @param string	$table_name		Table to check the index at
+	 * @param string	$index_name		The index name to check
+	 * @return bool True if index exists, else false
+	 */
+	public function sql_unique_index_exists($table_name, $index_name);
+
+	/**
+	 * Add unique index
+	 *
+	 * @param string	$table_name		Table to modify
+	 * @param string	$index_name		Name of the unique index to create
+	 * @param string|array	$column		Either a string with a column name, or an array with columns
+	 * @return array|true	Statements to run, or true if the statements have been executed
+	 */
+	public function sql_create_unique_index($table_name, $index_name, $column);
+
+	/**
+	 * Add primary key
+	 *
+	 * @param string	$table_name		Table to modify
+	 * @param string|array	$column		Either a string with a column name, or an array with columns
+	 * @param bool		$inline			Whether the query should actually be run,
+	 *						or return a string for creating the key
+	 * @return array|true	Statements to run, or true if the statements have been executed
+	 */
+	public function sql_create_primary_key($table_name, $column, $inline = false);
+}
diff --git a/phpBB/phpbb/debug/debug.php b/phpBB/phpbb/debug/debug.php
new file mode 100644
index 0000000000..c5ffada2e5
--- /dev/null
+++ b/phpBB/phpbb/debug/debug.php
@@ -0,0 +1,80 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\debug;
+
+use Symfony\Component\Debug\BufferingLogger;
+use Symfony\Component\Debug\DebugClassLoader;
+use Symfony\Component\Debug\ExceptionHandler;
+
+/**
+ * Registers all the debug tools.
+
+ * @see Symfony\Component\Debug\Debug
+ */
+class debug
+{
+	private static $enabled = false;
+
+	/**
+	 * Enables the debug tools.
+	 *
+	 * This method registers an error handler and an exception handler.
+	 *
+	 * If the Symfony ClassLoader component is available, a special
+	 * class loader is also registered.
+	 *
+	 * @param int  $errorReportingLevel The level of error reporting you want
+	 * @param bool $displayErrors       Whether to display errors (for development) or just log them (for production)
+	 */
+	public static function enable($errorReportingLevel = null, $displayErrors = true)
+	{
+		if (static::$enabled)
+		{
+			return;
+		}
+
+		static::$enabled = true;
+
+		if ($errorReportingLevel !== null)
+		{
+			error_reporting($errorReportingLevel);
+		}
+		else
+		{
+			error_reporting(-1);
+		}
+
+		if ('cli' !== php_sapi_name())
+		{
+			ini_set('display_errors', 0);
+			ExceptionHandler::register();
+		}
+		else if ($displayErrors && (!ini_get('log_errors') || ini_get('error_log')))
+		{
+			// CLI - display errors only if they're not already logged to STDERR
+			ini_set('display_errors', 1);
+		}
+
+		if ($displayErrors)
+		{
+			error_handler::register(new error_handler(new BufferingLogger()));
+		}
+		else
+		{
+			error_handler::register()->throwAt(0, true);
+		}
+
+		DebugClassLoader::enable();
+	}
+}
diff --git a/phpBB/phpbb/debug/error_handler.php b/phpBB/phpbb/debug/error_handler.php
new file mode 100644
index 0000000000..ebd828b97f
--- /dev/null
+++ b/phpBB/phpbb/debug/error_handler.php
@@ -0,0 +1,31 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\debug;
+
+use Symfony\Component\Debug\ErrorHandler;
+
+class error_handler extends ErrorHandler
+{
+	public function handleError($type, $message, $file, $line)
+	{
+		if ($type === E_USER_WARNING || $type === E_USER_NOTICE)
+		{
+			$handler = defined('PHPBB_MSG_HANDLER') ? PHPBB_MSG_HANDLER : 'msg_handler';
+
+			$handler($type, $message, $file, $line);
+		}
+
+		return parent::handleError($type, $message, $file, $line);
+	}
+}
diff --git a/phpBB/phpbb/di/container_builder.php b/phpBB/phpbb/di/container_builder.php
index 5f3aa685bf..8c1ce8bde2 100644
--- a/phpBB/phpbb/di/container_builder.php
+++ b/phpBB/phpbb/di/container_builder.php
@@ -13,406 +13,661 @@
 
 namespace phpbb\di;
 
+use phpbb\filesystem\filesystem;
+use Symfony\Bridge\ProxyManager\LazyProxy\PhpDumper\ProxyDumper;
+use Symfony\Component\Config\ConfigCache;
+use Symfony\Component\Config\FileLocator;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Dumper\PhpDumper;
-use Symfony\Component\HttpKernel\DependencyInjection\RegisterListenersPass;
+use Symfony\Component\DependencyInjection\Loader\YamlFileLoader;
+use Symfony\Component\DependencyInjection\ParameterBag\ParameterBag;
+use Symfony\Component\EventDispatcher\DependencyInjection\RegisterListenersPass;
+use Symfony\Component\Filesystem\Exception\IOException;
+use Symfony\Component\Finder\Finder;
+use Symfony\Component\HttpKernel\DependencyInjection\MergeExtensionConfigurationPass;
 
 class container_builder
 {
-	/** @var string phpBB Root Path */
+	/**
+	 * @var string The environment to use.
+	 */
+	protected $environment;
+
+	/**
+	 * @var string phpBB Root Path
+	 */
 	protected $phpbb_root_path;
 
-	/** @var string php file extension  */
+	/**
+	 * @var string php file extension
+	 */
 	protected $php_ext;
 
 	/**
-	* The container under construction
-	*
-	* @var ContainerBuilder
-	*/
+	 * The container under construction
+	 *
+	 * @var ContainerBuilder
+	 */
 	protected $container;
 
 	/**
-	* @var \phpbb\db\driver\driver_interface
-	*/
+	 * @var \phpbb\db\driver\driver_interface
+	 */
 	protected $dbal_connection = null;
 
 	/**
-	* @var array the installed extensions
-	*/
-	protected $installed_exts = null;
-
-	/**
-	* Indicates whether the php config file should be injected into the container (default to true).
-	*
-	* @var bool
-	*/
-	protected $inject_config = true;
-
-	/**
-	* Indicates whether extensions should be used (default to true).
-	*
-	* @var bool
-	*/
+	 * Indicates whether extensions should be used (default to true).
+	 *
+	 * @var bool
+	 */
 	protected $use_extensions = true;
 
 	/**
-	* Defines a custom path to find the configuration of the container (default to $this->phpbb_root_path . 'config')
-	*
-	* @var string
-	*/
+	 * Defines a custom path to find the configuration of the container (default to $this->phpbb_root_path . 'config')
+	 *
+	 * @var string
+	 */
 	protected $config_path = null;
 
 	/**
-	* Indicates whether the phpBB compile pass should be used (default to true).
-	*
-	* @var bool
-	*/
-	protected $use_custom_pass = true;
+	 * Indicates whether the container should be dumped to the filesystem (default to true).
+	 *
+	 * If DEBUG_CONTAINER is set this option is ignored and a new container is build.
+	 *
+	 * @var bool
+	 */
+	protected $use_cache = true;
 
 	/**
-	* Indicates whether the kernel compile pass should be used (default to true).
-	*
-	* @var bool
-	*/
-	protected $use_kernel_pass = true;
+	 * Indicates if the container should be compiled automatically (default to true).
+	 *
+	 * @var bool
+	 */
+	protected $compile_container = true;
 
 	/**
-	* Indicates whether the container should be dumped to the filesystem (default to true).
-	*
-	* If DEBUG_CONTAINER is set this option is ignored and a new container is build.
-	*
-	* @var bool
-	*/
-	protected $dump_container = true;
+	 * Custom parameters to inject into the container.
+	 *
+	 * Default to:
+	 * 	array(
+	 * 		'core.root_path', $this->phpbb_root_path,
+	 * 		'core.php_ext', $this->php_ext,
+	 * );
+	 *
+	 * @var array
+	 */
+	protected $custom_parameters = [];
 
 	/**
-	* Indicates if the container should be compiled automatically (default to true).
-	*
-	* @var bool
-	*/
-	protected $compile_container = true;
+	 * @var \phpbb\config_php_file
+	 */
+	protected $config_php_file;
 
 	/**
-	* Custom parameters to inject into the container.
-	*
-	* Default to true:
-	* 	array(
-	* 		'core.root_path', $this->phpbb_root_path,
-	* 		'core.php_ext', $this->php_ext,
-	* );
-	*
-	* @var array
-	*/
-	protected $custom_parameters = null;
+	 * @var string
+	 */
+	protected $cache_dir;
 
 	/**
-	* @var \phpbb\config_php_file
-	*/
-	protected $config_php_file;
+	 * @var array
+	 */
+	private $container_extensions;
+
+	/** @var \Exception */
+	private $build_exception;
 
 	/**
-	* Constructor
-	*
-	* @param \phpbb\config_php_file $config_php_file
-	* @param string $phpbb_root_path Path to the phpbb includes directory.
-	* @param string $php_ext php file extension
-	*/
-	function __construct(\phpbb\config_php_file $config_php_file, $phpbb_root_path, $php_ext)
+	 * Constructor
+	 *
+	 * @param string $phpbb_root_path Path to the phpbb includes directory.
+	 * @param string $php_ext php file extension
+	 */
+	public function __construct($phpbb_root_path, $php_ext)
 	{
-		$this->config_php_file = $config_php_file;
 		$this->phpbb_root_path = $phpbb_root_path;
 		$this->php_ext = $php_ext;
 	}
 
 	/**
-	* Build and return a new Container respecting the current configuration
-	*
-	* @return \phpbb_cache_container|ContainerBuilder
-	*/
+	 * Build and return a new Container respecting the current configuration
+	 *
+	 * @return \phpbb_cache_container|ContainerBuilder
+	 */
 	public function get_container()
 	{
-		$container_filename = $this->get_container_filename();
-		if (!defined('DEBUG_CONTAINER') && $this->dump_container && file_exists($container_filename))
+		try
 		{
-			require($container_filename);
-			$this->container = new \phpbb_cache_container();
-		}
-		else
-		{
-			if ($this->config_path === null)
+			$container_filename = $this->get_container_filename();
+			$config_cache = new ConfigCache($container_filename, defined('DEBUG'));
+			if ($this->use_cache && $config_cache->isFresh())
 			{
-				$this->config_path = $this->phpbb_root_path . 'config';
-			}
-			$container_extensions = array(new \phpbb\di\extension\core($this->config_path));
+				if ($this->use_extensions)
+				{
+					$autoload_cache = new ConfigCache($this->get_autoload_filename(), defined('DEBUG'));
+					if (!$autoload_cache->isFresh())
+					{
+						// autoload cache should be refreshed
+						$this->load_extensions();
+					}
+
+					require($this->get_autoload_filename());
+				}
 
-			if ($this->use_extensions)
-			{
-				$installed_exts = $this->get_installed_extensions();
-				$container_extensions[] = new \phpbb\di\extension\ext($installed_exts);
+				require($config_cache->getPath());
+				$this->container = new \phpbb_cache_container();
 			}
-
-			if ($this->inject_config)
+			else
 			{
-				$container_extensions[] = new \phpbb\di\extension\config($this->config_php_file);
-			}
+				$this->container_extensions = array(new extension\core($this->get_config_path()));
 
-			$this->container = $this->create_container($container_extensions);
+				if ($this->use_extensions)
+				{
+					$this->load_extensions();
+				}
 
-			if ($this->use_custom_pass)
-			{
-				// Symfony Kernel Listeners
-				$this->container->addCompilerPass(new \phpbb\di\pass\collection_pass());
+				// Inject the config
+				if ($this->config_php_file)
+				{
+					$this->container_extensions[] = new extension\config($this->config_php_file);
+				}
+
+				$this->container = $this->create_container($this->container_extensions);
+
+				// Easy collections through tags
+				$this->container->addCompilerPass(new pass\collection_pass());
+
+				// Event listeners "phpBB style"
 				$this->container->addCompilerPass(new RegisterListenersPass('dispatcher', 'event.listener_listener', 'event.listener'));
 
-				if ($this->use_kernel_pass)
+				// Event listeners "Symfony style"
+				$this->container->addCompilerPass(new RegisterListenersPass('dispatcher'));
+
+				if ($this->use_extensions)
 				{
-					$this->container->addCompilerPass(new RegisterListenersPass('dispatcher'));
+					$this->register_ext_compiler_pass();
 				}
+
+				$filesystem = new filesystem();
+				$loader     = new YamlFileLoader($this->container, new FileLocator($filesystem->realpath($this->get_config_path())));
+				$loader->load($this->container->getParameter('core.environment') . '/config.yml');
+
+				$this->inject_custom_parameters();
+
+				if ($this->compile_container)
+				{
+					$this->container->compile();
+
+					if ($this->use_cache)
+					{
+						$this->dump_container($config_cache);
+					}
+				}
+			}
+
+			if ($this->compile_container && $this->config_php_file)
+			{
+				$this->container->set('config.php', $this->config_php_file);
 			}
 
-			$this->inject_custom_parameters();
+			$this->inject_dbal_driver();
 
-			if ($this->compile_container)
+			return $this->container;
+		}
+		catch (\Exception $e)
+		{
+			// Don't try to recover if we are in the development environment
+			if ($this->get_environment() === 'development')
 			{
-				$this->container->compile();
+				throw $e;
 			}
 
-			if ($this->dump_container && !defined('DEBUG_CONTAINER'))
+			if ($this->build_exception === null)
+			{
+				$this->build_exception = $e;
+
+				return $this
+					->without_extensions()
+					->without_cache()
+					->with_custom_parameters(array_merge($this->custom_parameters, [
+						'container_exception' => $e,
+					]))
+					->get_container();
+			}
+			else
 			{
-				$this->dump_container($container_filename);
+				// Rethrow the original exception if it's still failing
+				throw $this->build_exception;
 			}
 		}
+	}
 
-		$this->container->set('config.php', $this->config_php_file);
-		$this->inject_dbal_driver();
+	/**
+	 * Enable the extensions.
+	 *
+	 * @param string $environment The environment to use
+	 * @return $this
+	 */
+	public function with_environment($environment)
+	{
+		$this->environment = $environment;
 
-		if ($this->compile_container)
-		{
-			$this->inject_dbal();
-		}
+		return $this;
+	}
 
-		return $this->container;
+	/**
+	 * Enable the extensions.
+	 *
+	 * @return $this
+	 */
+	public function with_extensions()
+	{
+		$this->use_extensions = true;
+
+		return $this;
 	}
 
 	/**
-	* Set if the extensions should be used.
-	*
-	* @param bool $use_extensions
-	*/
-	public function set_use_extensions($use_extensions)
+	 * Disable the extensions.
+	 *
+	 * @return $this
+	 */
+	public function without_extensions()
 	{
-		$this->use_extensions = $use_extensions;
+		$this->use_extensions = false;
+
+		return $this;
 	}
 
 	/**
-	* Set if the phpBB compile pass have to be used.
-	*
-	* @param bool $use_custom_pass
-	*/
-	public function set_use_custom_pass($use_custom_pass)
+	 * Enable the caching of the container.
+	 *
+	 * If DEBUG_CONTAINER is set this option is ignored and a new container is build.
+	 *
+	 * @return $this
+	 */
+	public function with_cache()
 	{
-		$this->use_custom_pass = $use_custom_pass;
+		$this->use_cache = true;
+
+		return $this;
 	}
 
 	/**
-	* Set if the kernel compile pass have to be used.
-	*
-	* @param bool $use_kernel_pass
-	*/
-	public function set_use_kernel_pass($use_kernel_pass)
+	 * Disable the caching of the container.
+	 *
+	 * @return $this
+	 */
+	public function without_cache()
 	{
-		$this->use_kernel_pass = $use_kernel_pass;
+		$this->use_cache = false;
+
+		return $this;
 	}
 
 	/**
-	* Set if the php config file should be injecting into the container.
-	*
-	* @param bool $inject_config
-	*/
-	public function set_inject_config($inject_config)
+	 * Set the cache directory.
+	 *
+	 * @param string $cache_dir The cache directory.
+	 * @return $this
+	 */
+	public function with_cache_dir($cache_dir)
 	{
-		$this->inject_config = $inject_config;
+		$this->cache_dir = $cache_dir;
+
+		return $this;
 	}
 
 	/**
-	* Set if a dump container should be used.
-	*
-	* If DEBUG_CONTAINER is set this option is ignored and a new container is build.
-	*
-	* @var bool $dump_container
-	*/
-	public function set_dump_container($dump_container)
+	 * Enable the compilation of the container.
+	 *
+	 * @return $this
+	 */
+	public function with_compiled_container()
 	{
-		$this->dump_container = $dump_container;
+		$this->compile_container = true;
+
+		return $this;
 	}
 
 	/**
-	* Set if the container should be compiled automatically (default to true).
-	*
-	* @var bool $dump_container
-	*/
-	public function set_compile_container($compile_container)
+	 * Disable the compilation of the container.
+	 *
+	 * @return $this
+	 */
+	public function without_compiled_container()
 	{
-		$this->compile_container = $compile_container;
+		$this->compile_container = false;
+
+		return $this;
 	}
 
 	/**
-	* Set a custom path to find the configuration of the container
-	*
-	* @param string $config_path
-	*/
-	public function set_config_path($config_path)
+	 * Set a custom path to find the configuration of the container.
+	 *
+	 * @param string $config_path
+	 * @return $this
+	 */
+	public function with_config_path($config_path)
 	{
 		$this->config_path = $config_path;
+
+		return $this;
 	}
 
 	/**
-	* Set custom parameters to inject into the container.
-	*
-	* @param array $custom_parameters
-	*/
-	public function set_custom_parameters($custom_parameters)
+	 * Set custom parameters to inject into the container.
+	 *
+	 * @param array $custom_parameters
+	 * @return $this
+	 */
+	public function with_custom_parameters($custom_parameters)
 	{
 		$this->custom_parameters = $custom_parameters;
+
+		return $this;
 	}
 
 	/**
-	* Dump the container to the disk.
-	*
-	* @param string $container_filename The name of the file.
-	*/
-	protected function dump_container($container_filename)
+	 * Set custom parameters to inject into the container.
+	 *
+	 * @param \phpbb\config_php_file $config_php_file
+	 * @return $this
+	 */
+	public function with_config(\phpbb\config_php_file $config_php_file)
 	{
-		$dumper = new PhpDumper($this->container);
-		$cached_container_dump = $dumper->dump(array(
-			'class'         => 'phpbb_cache_container',
-			'base_class'    => 'Symfony\\Component\\DependencyInjection\\ContainerBuilder',
-		));
+		$this->config_php_file = $config_php_file;
 
-		file_put_contents($container_filename, $cached_container_dump);
+		return $this;
 	}
 
 	/**
-	* Inject the connection into the container if one was opened.
-	*/
-	protected function inject_dbal()
+	 * Returns the path to the container configuration (default: root_path/config)
+	 *
+	 * @return string
+	 */
+	protected function get_config_path()
 	{
-		if ($this->dbal_connection !== null)
-		{
-			$this->container->get('dbal.conn')->set_driver($this->dbal_connection);
-		}
+		return $this->config_path ?: $this->phpbb_root_path . 'config';
 	}
 
 	/**
-	 * Inject the dbal connection driver into container
+	 * Returns the path to the cache directory (default: root_path/cache/environment).
+	 *
+	 * @return string Path to the cache directory.
 	 */
-	protected function inject_dbal_driver()
+	protected function get_cache_dir()
 	{
-		$config_data = $this->config_php_file->get_all();
-		if (!empty($config_data))
-		{
-			$this->container->set('dbal.conn.driver', $this->get_dbal_connection());
-		}
+		return $this->cache_dir ?: $this->phpbb_root_path . 'cache/' . $this->get_environment() . '/';
 	}
 
 	/**
-	* Get DB connection.
-	*
-	* @return \phpbb\db\driver\driver_interface
-	*/
-	protected function get_dbal_connection()
+	 * Load the enabled extensions.
+	 */
+	protected function load_extensions()
 	{
-		if ($this->dbal_connection === null)
+		if ($this->config_php_file !== null)
 		{
-			$dbal_driver_class = $this->config_php_file->convert_30_dbms_to_31($this->config_php_file->get('dbms'));
-			$this->dbal_connection = new $dbal_driver_class();
-			$this->dbal_connection->sql_connect(
-				$this->config_php_file->get('dbhost'),
-				$this->config_php_file->get('dbuser'),
-				$this->config_php_file->get('dbpasswd'),
-				$this->config_php_file->get('dbname'),
-				$this->config_php_file->get('dbport'),
-				false,
-				defined('PHPBB_DB_NEW_LINK') && PHPBB_DB_NEW_LINK
-			);
-		}
+			// Build an intermediate container to load the ext list from the database
+			$container_builder = new container_builder($this->phpbb_root_path, $this->php_ext);
+			$ext_container = $container_builder
+				->without_cache()
+				->without_extensions()
+				->with_config($this->config_php_file)
+				->with_config_path($this->get_config_path())
+				->with_environment('production')
+				->without_compiled_container()
+				->get_container()
+			;
+
+			$ext_container->register('cache.driver', '\\phpbb\\cache\\driver\\dummy');
+			$ext_container->compile();
+
+			$extensions = $ext_container->get('ext.manager')->all_enabled();
+
+			// Load each extension found
+			$autoloaders = '<?php
+/**
+ * Loads all extensions custom auto-loaders.
+ *
+ * This file has been auto-generated
+ * by phpBB while loading the extensions.
+ */
+
+';
+			foreach ($extensions as $ext_name => $path)
+			{
+				$extension_class = '\\' . str_replace('/', '\\', $ext_name) . '\\di\\extension';
+
+				if (!class_exists($extension_class))
+				{
+					$extension_class = '\\phpbb\\extension\\di\\extension_base';
+				}
+
+				$this->container_extensions[] = new $extension_class($ext_name, $path);
+
+				// Load extension autoloader
+				$filename = $path . 'vendor/autoload.php';
+				if (file_exists($filename))
+				{
+					$autoloaders .= "require('{$filename}');\n";
+				}
+			}
+
+			$configCache = new ConfigCache($this->get_autoload_filename(), false);
+			$configCache->write($autoloaders);
 
-		return $this->dbal_connection;
+			require($this->get_autoload_filename());
+		}
+		else
+		{
+			// To load the extensions we need the database credentials.
+			// Automatically disable the extensions if we don't have them.
+			$this->use_extensions = false;
+		}
 	}
 
 	/**
-	* Get enabled extensions.
-	*
-	* @return array enabled extensions
-	*/
-	protected function get_installed_extensions()
+	 * Dump the container to the disk.
+	 *
+	 * @param ConfigCache $cache The config cache
+	 */
+	protected function dump_container($cache)
 	{
-		$db = $this->get_dbal_connection();
-		$extension_table = $this->config_php_file->get('table_prefix') . 'ext';
-
-		$sql = 'SELECT *
-			FROM ' . $extension_table . '
-			WHERE ext_active = 1';
+		try
+		{
+			$dumper = new PhpDumper($this->container);
+			$proxy_dumper = new ProxyDumper();
+			$dumper->setProxyDumper($proxy_dumper);
 
-		$result = $db->sql_query($sql);
-		$rows = $db->sql_fetchrowset($result);
-		$db->sql_freeresult($result);
+			$cached_container_dump = $dumper->dump(array(
+				'class'      => 'phpbb_cache_container',
+				'base_class' => 'Symfony\\Component\\DependencyInjection\\ContainerBuilder',
+			));
 
-		$exts = array();
-		foreach ($rows as $row)
+			$cache->write($cached_container_dump, $this->container->getResources());
+		}
+		catch (IOException $e)
 		{
-			$exts[$row['ext_name']] = $this->phpbb_root_path . 'ext/' . $row['ext_name'] . '/';
+			// Don't fail if the cache isn't writeable
 		}
-
-		return $exts;
 	}
 
 	/**
-	* Create the ContainerBuilder object
-	*
-	* @param array $extensions Array of Container extension objects
-	* @return ContainerBuilder object
-	*/
+	 * Create the ContainerBuilder object
+	 *
+	 * @param array $extensions Array of Container extension objects
+	 * @return ContainerBuilder object
+	 */
 	protected function create_container(array $extensions)
 	{
-		$container = new ContainerBuilder();
+		$container = new ContainerBuilder(new ParameterBag($this->get_core_parameters()));
+		$container->setProxyInstantiator(new proxy_instantiator($this->get_cache_dir()));
+
+		$extensions_alias = array();
 
 		foreach ($extensions as $extension)
 		{
 			$container->registerExtension($extension);
-			$container->loadFromExtension($extension->getAlias());
+			$extensions_alias[] = $extension->getAlias();
 		}
 
+		$container->getCompilerPassConfig()->setMergePass(new MergeExtensionConfigurationPass($extensions_alias));
+
 		return $container;
 	}
 
 	/**
-	* Inject the customs parameters into the container
-	*/
+	 * Inject the customs parameters into the container
+	 */
 	protected function inject_custom_parameters()
 	{
-		if ($this->custom_parameters === null)
+		foreach ($this->custom_parameters as $key => $value)
 		{
-			$this->custom_parameters = array(
-				'core.root_path' => $this->phpbb_root_path,
-				'core.php_ext' => $this->php_ext,
-			);
+			$this->container->setParameter($key, $value);
 		}
+	}
 
-		foreach ($this->custom_parameters as $key => $value)
+	/**
+	 * Inject the dbal connection driver into container
+	 */
+	protected function inject_dbal_driver()
+	{
+		if (empty($this->config_php_file))
 		{
-			$this->container->setParameter($key, $value);
+			return;
+		}
+
+		$config_data = $this->config_php_file->get_all();
+		if (!empty($config_data))
+		{
+			if ($this->dbal_connection === null)
+			{
+				$dbal_driver_class = $this->config_php_file->convert_30_dbms_to_31($this->config_php_file->get('dbms'));
+				/** @var \phpbb\db\driver\driver_interface $dbal_connection */
+				$this->dbal_connection = new $dbal_driver_class();
+				$this->dbal_connection->sql_connect(
+					$this->config_php_file->get('dbhost'),
+					$this->config_php_file->get('dbuser'),
+					$this->config_php_file->get('dbpasswd'),
+					$this->config_php_file->get('dbname'),
+					$this->config_php_file->get('dbport'),
+					false,
+					defined('PHPBB_DB_NEW_LINK') && PHPBB_DB_NEW_LINK
+				);
+			}
+			$this->container->set('dbal.conn.driver', $this->dbal_connection);
+		}
+	}
+
+	/**
+	 * Returns the core parameters.
+	 *
+	 * @return array An array of core parameters
+	 */
+	protected function get_core_parameters()
+	{
+		return array_merge(
+			array(
+				'core.root_path'     => $this->phpbb_root_path,
+				'core.php_ext'       => $this->php_ext,
+				'core.environment'   => $this->get_environment(),
+				'core.debug'         => defined('DEBUG') ? DEBUG : false,
+				'core.cache_dir'     => $this->get_cache_dir(),
+			),
+			$this->get_env_parameters()
+		);
+	}
+
+	/**
+	 * Gets the environment parameters.
+	 *
+	 * Only the parameters starting with "PHPBB__" are considered.
+	 *
+	 * @return array An array of parameters
+	 */
+	protected function get_env_parameters()
+	{
+		$parameters = array();
+		foreach ($_SERVER as $key => $value)
+		{
+			if (0 === strpos($key, 'PHPBB__'))
+			{
+				$parameters[strtolower(str_replace('__', '.', substr($key, 9)))] = $value;
+			}
 		}
+
+		return $parameters;
 	}
 
 	/**
-	* Get the filename under which the dumped container will be stored.
-	*
-	* @return string Path for dumped container
-	*/
+	 * Get the filename under which the dumped container will be stored.
+	 *
+	 * @return string Path for dumped container
+	 */
 	protected function get_container_filename()
 	{
-		return $this->phpbb_root_path . 'cache/container_' . md5($this->phpbb_root_path) . '.' . $this->php_ext;
+		$container_params = [
+			'phpbb_root_path' => $this->phpbb_root_path,
+			'use_extensions' => $this->use_extensions,
+			'config_path' => $this->config_path,
+		];
+
+		return $this->get_cache_dir() . 'container_' . md5(implode(',', $container_params)) . '.' . $this->php_ext;
+	}
+
+	/**
+	 * Get the filename under which the dumped extensions autoloader will be stored.
+	 *
+	 * @return string Path for dumped extensions autoloader
+	 */
+	protected function get_autoload_filename()
+	{
+		$container_params = [
+			'phpbb_root_path' => $this->phpbb_root_path,
+			'use_extensions' => $this->use_extensions,
+			'config_path' => $this->config_path,
+		];
+
+		return $this->get_cache_dir() . 'autoload_' . md5(implode(',', $container_params)) . '.' . $this->php_ext;
+	}
+
+	/**
+	 * Return the name of the current environment.
+	 *
+	 * @return string
+	 */
+	protected function get_environment()
+	{
+		return $this->environment ?: PHPBB_ENVIRONMENT;
+	}
+
+	private function register_ext_compiler_pass()
+	{
+		$finder = new Finder();
+		$finder
+			->name('*_pass.php')
+			->path('di/pass')
+			->files()
+			->ignoreDotFiles(true)
+			->ignoreUnreadableDirs(true)
+			->ignoreVCS(true)
+			->followLinks()
+			->in($this->phpbb_root_path . 'ext')
+		;
+
+		/** @var \SplFileInfo $pass */
+		foreach ($finder as $pass)
+		{
+			$filename = $pass->getPathname();
+			$filename = substr($filename, 0, -strlen('.' . $pass->getExtension()));
+			$filename = str_replace(DIRECTORY_SEPARATOR, '/', $filename);
+			$className = preg_replace('#^.*ext/#', '', $filename);
+			$className = '\\' . str_replace('/', '\\', $className);
+
+			if (class_exists($className) && in_array('Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface', class_implements($className), true))
+			{
+				$this->container->addCompilerPass(new $className());
+			}
+		}
 	}
 }
diff --git a/phpBB/phpbb/di/extension/container_configuration.php b/phpBB/phpbb/di/extension/container_configuration.php
new file mode 100644
index 0000000000..4585d6509e
--- /dev/null
+++ b/phpBB/phpbb/di/extension/container_configuration.php
@@ -0,0 +1,52 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\di\extension;
+
+use Symfony\Component\Config\Definition\Builder\TreeBuilder;
+use Symfony\Component\Config\Definition\ConfigurationInterface;
+
+class container_configuration implements ConfigurationInterface
+{
+
+	/**
+	 * Generates the configuration tree builder.
+	 *
+	 * @return \Symfony\Component\Config\Definition\Builder\TreeBuilder The tree builder
+	 */
+	public function getConfigTreeBuilder()
+	{
+		$treeBuilder = new TreeBuilder();
+		$rootNode = $treeBuilder->root('core');
+		$rootNode
+			->children()
+				->booleanNode('require_dev_dependencies')->defaultValue(false)->end()
+				->arrayNode('debug')
+					->addDefaultsIfNotSet()
+					->children()
+						->booleanNode('exceptions')->defaultValue(false)->end()
+					->end()
+				->end()
+				->arrayNode('twig')
+					->addDefaultsIfNotSet()
+					->children()
+						->booleanNode('debug')->defaultValue(null)->end()
+						->booleanNode('auto_reload')->defaultValue(null)->end()
+						->booleanNode('enable_debug_extension')->defaultValue(false)->end()
+					->end()
+				->end()
+			->end()
+		;
+		return $treeBuilder;
+	}
+}
diff --git a/phpBB/phpbb/di/extension/core.php b/phpBB/phpbb/di/extension/core.php
index ca4fa5c082..67150f0103 100644
--- a/phpBB/phpbb/di/extension/core.php
+++ b/phpBB/phpbb/di/extension/core.php
@@ -13,53 +13,110 @@
 
 namespace phpbb\di\extension;
 
+use Symfony\Component\Config\FileLocator;
+use Symfony\Component\Config\Resource\FileResource;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
-use Symfony\Component\HttpKernel\DependencyInjection\Extension;
 use Symfony\Component\DependencyInjection\Loader\YamlFileLoader;
-use Symfony\Component\Config\FileLocator;
+use Symfony\Component\HttpKernel\DependencyInjection\Extension;
 
 /**
 * Container core extension
 */
 class core extends Extension
 {
+	const TWIG_OPTIONS_POSITION = 7;
+
 	/**
-	* Config path
-	* @var string
-	*/
+	 * Config path
+	 * @var string
+	 */
 	protected $config_path;
 
 	/**
-	* Constructor
-	*
-	* @param string $config_path Config path
-	*/
+	 * Constructor
+	 *
+	 * @param string $config_path Config path
+	 */
 	public function __construct($config_path)
 	{
 		$this->config_path = $config_path;
 	}
 
 	/**
-	* Loads a specific configuration.
-	*
-	* @param array            $config    An array of configuration values
-	* @param ContainerBuilder $container A ContainerBuilder instance
-	*
-	* @throws \InvalidArgumentException When provided tag is not defined in this extension
-	*/
-	public function load(array $config, ContainerBuilder $container)
+	 * Loads a specific configuration.
+	 *
+	 * @param array            $configs   An array of configuration values
+	 * @param ContainerBuilder $container A ContainerBuilder instance
+	 *
+	 * @throws \InvalidArgumentException When provided tag is not defined in this extension
+	 */
+	public function load(array $configs, ContainerBuilder $container)
+	{
+		$filesystem = new \phpbb\filesystem\filesystem();
+		$loader = new YamlFileLoader($container, new FileLocator($filesystem->realpath($this->config_path)));
+		$loader->load($container->getParameter('core.environment') . '/container/environment.yml');
+
+		$config = $this->getConfiguration($configs, $container);
+		$config = $this->processConfiguration($config, $configs);
+
+		if ($config['require_dev_dependencies'])
+		{
+			if (!class_exists('Goutte\Client', true))
+			{
+				trigger_error(
+					'Composer development dependencies have not been set up for the ' . $container->getParameter('core.environment') . ' environment yet, run ' .
+					"'php ../composer.phar install --dev' from the phpBB directory to do so.",
+					E_USER_ERROR
+				);
+			}
+		}
+
+		// Set the Twig options if defined in the environment
+		$definition = $container->getDefinition('template.twig.environment');
+		$twig_environment_options = $definition->getArgument(static::TWIG_OPTIONS_POSITION);
+		if ($config['twig']['debug'])
+		{
+			$twig_environment_options['debug'] = true;
+		}
+		if ($config['twig']['auto_reload'])
+		{
+			$twig_environment_options['auto_reload'] = true;
+		}
+
+		// Replace the 7th argument, the options passed to the environment
+		$definition->replaceArgument(static::TWIG_OPTIONS_POSITION, $twig_environment_options);
+
+		if ($config['twig']['enable_debug_extension'])
+		{
+			$definition = $container->getDefinition('template.twig.extensions.debug');
+			$definition->addTag('twig.extension');
+		}
+
+		// Set the debug options
+		foreach ($config['debug'] as $name => $value)
+		{
+			$container->setParameter('debug.' . $name, $value);
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function getConfiguration(array $config, ContainerBuilder $container)
 	{
-		$loader = new YamlFileLoader($container, new FileLocator(phpbb_realpath($this->config_path)));
-		$loader->load('services.yml');
+		$r = new \ReflectionClass('\phpbb\di\extension\container_configuration');
+		$container->addResource(new FileResource($r->getFileName()));
+
+		return new container_configuration();
 	}
 
 	/**
-	* Returns the recommended alias to use in XML.
-	*
-	* This alias is also the mandatory prefix to use when using YAML.
-	*
-	* @return string The alias
-	*/
+	 * Returns the recommended alias to use in XML.
+	 *
+	 * This alias is also the mandatory prefix to use when using YAML.
+	 *
+	 * @return string The alias
+	 */
 	public function getAlias()
 	{
 		return 'core';
diff --git a/phpBB/phpbb/di/extension/ext.php b/phpBB/phpbb/di/extension/ext.php
deleted file mode 100644
index 718c992d2e..0000000000
--- a/phpBB/phpbb/di/extension/ext.php
+++ /dev/null
@@ -1,67 +0,0 @@
-<?php
-/**
-*
-* This file is part of the phpBB Forum Software package.
-*
-* @copyright (c) phpBB Limited <https://www.phpbb.com>
-* @license GNU General Public License, version 2 (GPL-2.0)
-*
-* For full copyright and license information, please see
-* the docs/CREDITS.txt file.
-*
-*/
-
-namespace phpbb\di\extension;
-
-use Symfony\Component\DependencyInjection\ContainerBuilder;
-use Symfony\Component\HttpKernel\DependencyInjection\Extension;
-use Symfony\Component\DependencyInjection\Loader\YamlFileLoader;
-use Symfony\Component\Config\FileLocator;
-
-/**
-* Container ext extension
-*/
-class ext extends Extension
-{
-	protected $paths = array();
-
-	public function __construct($enabled_extensions)
-	{
-		foreach ($enabled_extensions as $ext => $path)
-		{
-			$this->paths[] = $path;
-		}
-	}
-
-	/**
-	* Loads a specific configuration.
-	*
-	* @param array            $config    An array of configuration values
-	* @param ContainerBuilder $container A ContainerBuilder instance
-	*
-	* @throws \InvalidArgumentException When provided tag is not defined in this extension
-	*/
-	public function load(array $config, ContainerBuilder $container)
-	{
-		foreach ($this->paths as $path)
-		{
-			if (file_exists($path . '/config/services.yml'))
-			{
-				$loader = new YamlFileLoader($container, new FileLocator(phpbb_realpath($path . '/config')));
-				$loader->load('services.yml');
-			}
-		}
-	}
-
-	/**
-	* Returns the recommended alias to use in XML.
-	*
-	* This alias is also the mandatory prefix to use when using YAML.
-	*
-	* @return string The alias
-	*/
-	public function getAlias()
-	{
-		return 'ext';
-	}
-}
diff --git a/phpBB/phpbb/di/ordered_service_collection.php b/phpBB/phpbb/di/ordered_service_collection.php
new file mode 100644
index 0000000000..046012ae5b
--- /dev/null
+++ b/phpBB/phpbb/di/ordered_service_collection.php
@@ -0,0 +1,117 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\di;
+
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * Collection of services in a specified order
+ */
+class ordered_service_collection extends service_collection
+{
+	/**
+	 * @var bool
+	 */
+	protected $is_ordered;
+
+	/**
+	 * @var array
+	 */
+	protected $service_ids;
+
+	/**
+	 * Constructor
+	 *
+	 * @param ContainerInterface $container Container object
+	 */
+	public function __construct(ContainerInterface $container)
+	{
+		$this->is_ordered = false;
+		$this->service_ids = array();
+
+		parent::__construct($container);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function getIterator()
+	{
+		if (!$this->is_ordered)
+		{
+			$this->sort_services();
+		}
+
+		return new service_collection_iterator($this);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function offsetExists($index)
+	{
+		if (!$this->is_ordered)
+		{
+			$this->sort_services();
+		}
+
+		return parent::offsetExists($index);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function offsetGet($index)
+	{
+		if (!$this->is_ordered)
+		{
+			$this->sort_services();
+		}
+
+		return parent::offsetGet($index);
+	}
+
+	/**
+	 * Adds a service ID to the collection
+	 *
+	 * @param string	$service_id
+	 * @param int		$order
+	 */
+	public function add($service_id, $order = 0)
+	{
+		$order = (int) $order;
+		$this->service_ids[$order][] = $service_id;
+		$this->is_ordered = false;
+	}
+
+	protected function sort_services()
+	{
+		if ($this->is_ordered)
+		{
+			return;
+		}
+
+		$this->exchangeArray(array());
+		ksort($this->service_ids);
+		foreach ($this->service_ids as $service_order_group)
+		{
+			foreach ($service_order_group as $service_id)
+			{
+				$this->offsetSet($service_id, null);
+			}
+		}
+
+		$this->is_ordered = true;
+	}
+}
diff --git a/phpBB/phpbb/di/pass/collection_pass.php b/phpBB/phpbb/di/pass/collection_pass.php
index a5c054674e..341f88518d 100644
--- a/phpBB/phpbb/di/pass/collection_pass.php
+++ b/phpBB/phpbb/di/pass/collection_pass.php
@@ -34,10 +34,30 @@ class collection_pass implements CompilerPassInterface
 		foreach ($container->findTaggedServiceIds('service_collection') as $id => $data)
 		{
 			$definition = $container->getDefinition($id);
+			$is_ordered_collection = (substr($definition->getClass(), -strlen('ordered_service_collection')) === 'ordered_service_collection');
+			$is_class_name_aware = (isset($data[0]['class_name_aware']) && $data[0]['class_name_aware']);
 
 			foreach ($container->findTaggedServiceIds($data[0]['tag']) as $service_id => $service_data)
 			{
-				$definition->addMethodCall('add', array($service_id));
+				if ($is_ordered_collection)
+				{
+					$arguments = array($service_id, $service_data[0]['order']);
+				}
+				else
+				{
+					$arguments = array($service_id);
+				}
+
+				if ($is_class_name_aware)
+				{
+					$service_definition = $container->getDefinition($service_id);
+					$definition->addMethodCall('add_service_class', array(
+						$service_id,
+						$service_definition->getClass()
+					));
+				}
+
+				$definition->addMethodCall('add', $arguments);
 			}
 		}
 	}
diff --git a/phpBB/phpbb/di/proxy_instantiator.php b/phpBB/phpbb/di/proxy_instantiator.php
new file mode 100644
index 0000000000..70295a3dec
--- /dev/null
+++ b/phpBB/phpbb/di/proxy_instantiator.php
@@ -0,0 +1,72 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\di;
+
+use ProxyManager\Configuration;
+use ProxyManager\Factory\LazyLoadingValueHolderFactory;
+use ProxyManager\GeneratorStrategy\EvaluatingGeneratorStrategy;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\DependencyInjection\Definition;
+use Symfony\Component\DependencyInjection\LazyProxy\Instantiator\InstantiatorInterface;
+
+/**
+ * Runtime lazy loading proxy generator extended for allowing use while using
+ * open_basedir restrictions
+ *
+ * Original author: Marco Pivetta <ocramius@gmail.com>
+ */
+class proxy_instantiator implements InstantiatorInterface
+{
+	/**
+	 * @var LazyLoadingValueHolderFactory
+	 */
+	private $factory;
+
+	/**
+	 * proxy_instantiator constructor
+	 * @param string $cache_dir Cache dir for fall back when using open_basedir
+	 */
+	public function __construct($cache_dir)
+	{
+		$config = new Configuration();
+
+		// Prevent trying to write to system temp dir in case of open_basedir
+		// restrictions being in effect
+		$tmp_dir = (function_exists('sys_get_temp_dir')) ? sys_get_temp_dir() : '';
+		if (empty($tmp_dir) || !@file_exists($tmp_dir) || !@is_writable($tmp_dir))
+		{
+			$config->setProxiesTargetDir($cache_dir);
+		}
+		$config->setGeneratorStrategy(new EvaluatingGeneratorStrategy());
+
+		$this->factory = new LazyLoadingValueHolderFactory($config);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function instantiateProxy(ContainerInterface $container, Definition $definition, $id, $realInstantiator)
+	{
+		return $this->factory->createProxy(
+			$definition->getClass(),
+			function (&$wrappedInstance, \ProxyManager\Proxy\LazyLoadingInterface $proxy) use ($realInstantiator) {
+				$wrappedInstance = call_user_func($realInstantiator);
+
+				$proxy->setProxyInitializer(null);
+
+				return true;
+			}
+		);
+	}
+}
diff --git a/phpBB/phpbb/di/service_collection.php b/phpBB/phpbb/di/service_collection.php
index 82ca9bf679..8e9175e204 100644
--- a/phpBB/phpbb/di/service_collection.php
+++ b/phpBB/phpbb/di/service_collection.php
@@ -26,6 +26,11 @@ class service_collection extends \ArrayObject
 	protected $container;
 
 	/**
+	* @var array
+	*/
+	protected $service_classes;
+
+	/**
 	* Constructor
 	*
 	* @param ContainerInterface $container Container object
@@ -33,6 +38,7 @@ class service_collection extends \ArrayObject
 	public function __construct(ContainerInterface $container)
 	{
 		$this->container = $container;
+		$this->service_classes = array();
 	}
 
 	/**
@@ -76,4 +82,25 @@ class service_collection extends \ArrayObject
 	{
 		$this->offsetSet($name, null);
 	}
+
+	/**
+	* Add a service's class to the collection
+	*
+	* @param string	$service_id
+	* @param string	$class
+	*/
+	public function add_service_class($service_id, $class)
+	{
+		$this->service_classes[$service_id] = $class;
+	}
+
+	/**
+	* Get services' classes
+	*
+	* @return array
+	*/
+	public function get_service_classes()
+	{
+		return $this->service_classes;
+	}
 }
diff --git a/phpBB/phpbb/di/service_collection_iterator.php b/phpBB/phpbb/di/service_collection_iterator.php
index 0d031ab52d..31bc156e99 100644
--- a/phpBB/phpbb/di/service_collection_iterator.php
+++ b/phpBB/phpbb/di/service_collection_iterator.php
@@ -32,7 +32,7 @@ class service_collection_iterator extends \ArrayIterator
 	*/
 	public function __construct(service_collection $collection, $flags = 0)
 	{
-		parent::__construct($collection, $flags);
+		parent::__construct($collection->getArrayCopy(), $flags);
 		$this->collection = $collection;
 	}
 
diff --git a/phpBB/phpbb/event/data.php b/phpBB/phpbb/event/data.php
index c7365aee35..276ab027f2 100644
--- a/phpBB/phpbb/event/data.php
+++ b/phpBB/phpbb/event/data.php
@@ -63,4 +63,16 @@ class data extends Event implements \ArrayAccess
 	{
 		unset($this->data[$offset]);
 	}
+
+	/**
+	 * Returns data with updated key in specified offset.
+	 *
+	 * @param	string	$subarray	Data array subarray
+	 * @param	string	$key		Subarray key
+	 * @param	mixed	$value		Value to update
+	 */
+	public function update_subarray($subarray, $key, $value)
+	{
+		$this->data[$subarray][$key] = $value;
+	}
 }
diff --git a/phpBB/phpbb/event/dispatcher.php b/phpBB/phpbb/event/dispatcher.php
index 1c4abeb108..1ba2ab8987 100644
--- a/phpBB/phpbb/event/dispatcher.php
+++ b/phpBB/phpbb/event/dispatcher.php
@@ -57,7 +57,12 @@ class dispatcher extends ContainerAwareEventDispatcher implements dispatcher_int
 			return $event;
 		}
 
-		return parent::dispatch($eventName, $event);
+		foreach ((array) $eventName as $name)
+		{
+			$event = parent::dispatch($name, $event);
+		}
+
+		return $event;
 	}
 
 	/**
diff --git a/phpBB/phpbb/event/kernel_exception_subscriber.php b/phpBB/phpbb/event/kernel_exception_subscriber.php
index 1ee771cfe7..373e59b0c8 100644
--- a/phpBB/phpbb/event/kernel_exception_subscriber.php
+++ b/phpBB/phpbb/event/kernel_exception_subscriber.php
@@ -16,6 +16,7 @@ namespace phpbb\event;
 use Symfony\Component\EventDispatcher\EventSubscriberInterface;
 use Symfony\Component\HttpFoundation\JsonResponse;
 use Symfony\Component\HttpKernel\Exception\HttpExceptionInterface;
+use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
 use Symfony\Component\HttpKernel\KernelEvents;
 use Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent;
 use Symfony\Component\HttpFoundation\Response;
@@ -23,16 +24,25 @@ use Symfony\Component\HttpFoundation\Response;
 class kernel_exception_subscriber implements EventSubscriberInterface
 {
 	/**
+	 * Set to true to show full exception messages
+	 *
+	 * @var bool
+	 */
+	protected $debug;
+
+	/**
 	* Template object
+	*
 	* @var \phpbb\template\template
 	*/
 	protected $template;
 
 	/**
-	* User object
-	* @var \phpbb\user
+	* Language object
+	*
+	* @var \phpbb\language\language
 	*/
-	protected $user;
+	protected $language;
 
 	/** @var \phpbb\request\type_cast_helper */
 	protected $type_caster;
@@ -40,13 +50,15 @@ class kernel_exception_subscriber implements EventSubscriberInterface
 	/**
 	* Construct method
 	*
-	* @param \phpbb\template\template $template Template object
-	* @param \phpbb\user $user User object
+	* @param \phpbb\template\template	$template	Template object
+	* @param \phpbb\language\language	$language	Language object
+	* @param bool						$debug		Set to true to show full exception messages
 	*/
-	public function __construct(\phpbb\template\template $template, \phpbb\user $user)
+	public function __construct(\phpbb\template\template $template, \phpbb\language\language $language, $debug = false)
 	{
+		$this->debug = $debug || defined('DEBUG');
 		$this->template = $template;
-		$this->user = $user;
+		$this->language = $language;
 		$this->type_caster = new \phpbb\request\type_cast_helper();
 	}
 
@@ -65,7 +77,11 @@ class kernel_exception_subscriber implements EventSubscriberInterface
 
 		if ($exception instanceof \phpbb\exception\exception_interface)
 		{
-			$message = call_user_func_array(array($this->user, 'lang'), array_merge(array($message), $exception->get_parameters()));
+			$message = $this->language->lang_array($message, $exception->get_parameters());
+		}
+		else if (!$this->debug && $exception instanceof NotFoundHttpException)
+		{
+			$message = $this->language->lang('PAGE_NOT_FOUND');
 		}
 
 		// Show <strong> text in bold
@@ -73,10 +89,10 @@ class kernel_exception_subscriber implements EventSubscriberInterface
 
 		if (!$event->getRequest()->isXmlHttpRequest())
 		{
-			page_header($this->user->lang('INFORMATION'));
+			page_header($this->language->lang('INFORMATION'));
 
 			$this->template->assign_vars(array(
-				'MESSAGE_TITLE' => $this->user->lang('INFORMATION'),
+				'MESSAGE_TITLE' => $this->language->lang('INFORMATION'),
 				'MESSAGE_TEXT'  => $message,
 			));
 
@@ -97,7 +113,7 @@ class kernel_exception_subscriber implements EventSubscriberInterface
 				$data['message'] = $message;
 			}
 
-			if (defined('DEBUG'))
+			if ($this->debug)
 			{
 				$data['trace'] = $exception->getTrace();
 			}
@@ -114,7 +130,7 @@ class kernel_exception_subscriber implements EventSubscriberInterface
 		$event->setResponse($response);
 	}
 
-	public static function getSubscribedEvents()
+	static public function getSubscribedEvents()
 	{
 		return array(
 			KernelEvents::EXCEPTION		=> 'on_kernel_exception',
diff --git a/phpBB/phpbb/event/kernel_request_subscriber.php b/phpBB/phpbb/event/kernel_request_subscriber.php
deleted file mode 100644
index ee9f29a59d..0000000000
--- a/phpBB/phpbb/event/kernel_request_subscriber.php
+++ /dev/null
@@ -1,82 +0,0 @@
-<?php
-/**
-*
-* This file is part of the phpBB Forum Software package.
-*
-* @copyright (c) phpBB Limited <https://www.phpbb.com>
-* @license GNU General Public License, version 2 (GPL-2.0)
-*
-* For full copyright and license information, please see
-* the docs/CREDITS.txt file.
-*
-*/
-
-namespace phpbb\event;
-
-use Symfony\Component\EventDispatcher\EventSubscriberInterface;
-use Symfony\Component\HttpKernel\KernelEvents;
-use Symfony\Component\HttpKernel\Event\GetResponseEvent;
-use Symfony\Component\HttpKernel\EventListener\RouterListener;
-use Symfony\Component\Routing\RequestContext;
-
-class kernel_request_subscriber implements EventSubscriberInterface
-{
-	/**
-	* Extension manager object
-	* @var \phpbb\extension\manager
-	*/
-	protected $manager;
-
-	/**
-	* PHP file extension
-	* @var string
-	*/
-	protected $php_ext;
-
-	/**
-	* Root path
-	* @var string
-	*/
-	protected $root_path;
-
-	/**
-	* Construct method
-	*
-	* @param \phpbb\extension\manager $manager Extension manager object
-	* @param string $root_path Root path
-	* @param string $php_ext PHP file extension
-	*/
-	public function __construct(\phpbb\extension\manager $manager, $root_path, $php_ext)
-	{
-		$this->root_path = $root_path;
-		$this->php_ext = $php_ext;
-		$this->manager = $manager;
-	}
-
-	/**
-	* This listener is run when the KernelEvents::REQUEST event is triggered
-	*
-	* This is responsible for setting up the routing information
-	*
-	* @param GetResponseEvent $event
-	* @throws \BadMethodCallException
-	* @return null
-	*/
-	public function on_kernel_request(GetResponseEvent $event)
-	{
-		$request = $event->getRequest();
-		$context = new RequestContext();
-		$context->fromRequest($request);
-
-		$matcher = phpbb_get_url_matcher($this->manager, $context, $this->root_path, $this->php_ext);
-		$router_listener = new RouterListener($matcher, $context);
-		$router_listener->onKernelRequest($event);
-	}
-
-	public static function getSubscribedEvents()
-	{
-		return array(
-			KernelEvents::REQUEST		=> 'on_kernel_request',
-		);
-	}
-}
diff --git a/phpBB/phpbb/event/kernel_terminate_subscriber.php b/phpBB/phpbb/event/kernel_terminate_subscriber.php
index 3a709f73fd..f0d0a2f595 100644
--- a/phpBB/phpbb/event/kernel_terminate_subscriber.php
+++ b/phpBB/phpbb/event/kernel_terminate_subscriber.php
@@ -32,7 +32,7 @@ class kernel_terminate_subscriber implements EventSubscriberInterface
 		exit_handler();
 	}
 
-	public static function getSubscribedEvents()
+	static public function getSubscribedEvents()
 	{
 		return array(
 			KernelEvents::TERMINATE		=> array('on_kernel_terminate', ~PHP_INT_MAX),
diff --git a/phpBB/phpbb/event/md_exporter.php b/phpBB/phpbb/event/md_exporter.php
index 02c2a1b9d6..1a2d7c989e 100644
--- a/phpBB/phpbb/event/md_exporter.php
+++ b/phpBB/phpbb/event/md_exporter.php
@@ -87,7 +87,7 @@ class md_exporter
 			$this->validate_events_from_file($file_name, $this->crawl_file_for_events($file_name));
 		}
 
-		return sizeof($this->events);
+		return count($this->events);
 	}
 
 	/**
@@ -99,7 +99,7 @@ class md_exporter
 	{
 		$this->crawl_eventsmd($md_file, 'styles');
 
-		$styles = array('prosilver', 'subsilver2');
+		$styles = array('prosilver');
 		foreach ($styles as $style)
 		{
 			$file_list = $this->get_recursive_file_list(
@@ -113,7 +113,7 @@ class md_exporter
 			}
 		}
 
-		return sizeof($this->events);
+		return count($this->events);
 	}
 
 	/**
@@ -143,6 +143,8 @@ class md_exporter
 
 			list($event_name, $details) = explode("\n===\n", $event, 2);
 			$this->validate_event_name($event_name);
+			$sorted_events = [$this->current_event, $event_name];
+			natsort($sorted_events);
 			$this->current_event = $event_name;
 
 			if (isset($this->events[$this->current_event]))
@@ -150,6 +152,12 @@ class md_exporter
 				throw new \LogicException("The event '{$this->current_event}' is defined multiple times");
 			}
 
+			// Use array_values() to get actual first element and check against natural order
+			if (array_values($sorted_events)[0] === $event_name)
+			{
+				throw new \LogicException("The event '{$sorted_events[1]}' should be defined before '{$sorted_events[0]}'");
+			}
+
 			if (($this->filter == 'adm' && strpos($this->current_event, 'acp_') !== 0)
 				|| ($this->filter == 'styles' && strpos($this->current_event, 'acp_') === 0))
 			{
@@ -219,7 +227,7 @@ class md_exporter
 			);
 		}
 
-		return sizeof($this->events);
+		return count($this->events);
 	}
 
 	/**
@@ -266,7 +274,7 @@ class md_exporter
 				$wiki_page = '= Template Events =' . "\n";
 			}
 			$wiki_page .= '{| class="zebra sortable" cellspacing="0" cellpadding="5"' . "\n";
-			$wiki_page .= '! Identifier !! Prosilver Placement (If applicable) !! Subsilver Placement (If applicable) !! Added in Release !! Explanation' . "\n";
+			$wiki_page .= '! Identifier !! Prosilver Placement (If applicable) !! Added in Release !! Explanation' . "\n";
 		}
 
 		foreach ($this->events as $event_name => $event)
@@ -280,7 +288,7 @@ class md_exporter
 			}
 			else
 			{
-				$wiki_page .= implode(', ', $event['files']['prosilver']) . ' || ' . implode(', ', $event['files']['subsilver2']);
+				$wiki_page .= implode(', ', $event['files']['prosilver']);
 			}
 
 			$wiki_page .= " || {$event['since']} || " . str_replace("\n", ' ', $event['description']) . "\n";
@@ -371,7 +379,6 @@ class md_exporter
 	{
 		$files_list = array(
 			'prosilver'		=> array(),
-			'subsilver2'	=> array(),
 			'adm'			=> array(),
 		);
 
@@ -382,26 +389,29 @@ class md_exporter
 			$files = explode("\n    + ", $file_details);
 			foreach ($files as $file)
 			{
+				if (!preg_match('#^([^ ]+)( \([0-9]+\))?$#', $file))
+				{
+					throw new \LogicException("Invalid event instances for file '{$file}' found for event '{$this->current_event}'", 1);
+				}
+
+				list($file) = explode(" ", $file);
+
 				if (!file_exists($this->path . $file) || substr($file, -5) !== '.html')
 				{
-					throw new \LogicException("Invalid file '{$file}' not found for event '{$this->current_event}'", 1);
+					throw new \LogicException("Invalid file '{$file}' not found for event '{$this->current_event}'", 2);
 				}
 
 				if (($this->filter !== 'adm') && strpos($file, 'styles/prosilver/template/') === 0)
 				{
 					$files_list['prosilver'][] = substr($file, strlen('styles/prosilver/template/'));
 				}
-				else if (($this->filter !== 'adm') && strpos($file, 'styles/subsilver2/template/') === 0)
-				{
-					$files_list['subsilver2'][] = substr($file, strlen('styles/subsilver2/template/'));
-				}
 				else if (($this->filter === 'adm') && strpos($file, 'adm/style/') === 0)
 				{
 					$files_list['adm'][] = substr($file, strlen('adm/style/'));
 				}
 				else
 				{
-					throw new \LogicException("Invalid file '{$file}' not found for event '{$this->current_event}'", 2);
+					throw new \LogicException("Invalid file '{$file}' not found for event '{$this->current_event}'", 3);
 				}
 
 				$this->events_by_file[$file][] = $this->current_event;
@@ -421,7 +431,7 @@ class md_exporter
 		}
 		else
 		{
-			throw new \LogicException("Invalid file list found for event '{$this->current_event}'", 2);
+			throw new \LogicException("Invalid file list found for event '{$this->current_event}'", 1);
 		}
 
 		return $files_list;
@@ -444,16 +454,9 @@ class md_exporter
 		$event_list = array();
 		$file_content = file_get_contents($this->path . $file);
 
-		$events = explode('<!-- EVENT ', $file_content);
-		// Remove the code before the first event
-		array_shift($events);
-		foreach ($events as $event)
-		{
-			$event = explode(' -->', $event, 2);
-			$event_list[] = array_shift($event);
-		}
+		preg_match_all('/(?:{%|<!--) EVENT (.*) (?:%}|-->)/U', $file_content, $event_list);
 
-		return $event_list;
+		return $event_list[1];
 	}
 
 	/**
diff --git a/phpBB/phpbb/event/php_exporter.php b/phpBB/phpbb/event/php_exporter.php
index ae3553c558..71c94a681d 100644
--- a/phpBB/phpbb/event/php_exporter.php
+++ b/phpBB/phpbb/event/php_exporter.php
@@ -117,7 +117,7 @@ class php_exporter
 		}
 		ksort($this->events);
 
-		return sizeof($this->events);
+		return count($this->events);
 	}
 
 	/**
@@ -196,13 +196,13 @@ class php_exporter
 		$content = file_get_contents($this->path . $this->current_file);
 		$num_events_found = 0;
 
-		if (strpos($content, "dispatcher->trigger_event('") || strpos($content, "dispatcher->dispatch('"))
+		if (strpos($content, 'dispatcher->trigger_event(') || strpos($content, 'dispatcher->dispatch('))
 		{
 			$this->set_content(explode("\n", $content));
-			for ($i = 0, $num_lines = sizeof($this->file_lines); $i < $num_lines; $i++)
+			for ($i = 0, $num_lines = count($this->file_lines); $i < $num_lines; $i++)
 			{
 				$event_line = false;
-				$found_trigger_event = strpos($this->file_lines[$i], "dispatcher->trigger_event('");
+				$found_trigger_event = strpos($this->file_lines[$i], 'dispatcher->trigger_event(');
 				$arguments = array();
 				if ($found_trigger_event !== false)
 				{
@@ -216,7 +216,7 @@ class php_exporter
 				}
 				else
 				{
-					$found_dispatch = strpos($this->file_lines[$i], "dispatcher->dispatch('");
+					$found_dispatch = strpos($this->file_lines[$i], 'dispatcher->dispatch(');
 					if ($found_dispatch !== false)
 					{
 						$event_line = $i;
@@ -264,7 +264,30 @@ class php_exporter
 
 					// Find event description line
 					$description_line_num = $this->find_description();
-					$description = substr(trim($this->file_lines[$description_line_num]), strlen('* '));
+					$description_lines = array();
+
+					while (true)
+					{
+						$description_line = substr(trim($this->file_lines[$description_line_num]), strlen('*'));
+						$description_line = trim(str_replace("\t", " ", $description_line));
+
+						// Reached end of description if line is a tag
+						if (strlen($description_line) && $description_line[0] == '@')
+						{
+							break;
+						}
+
+						$description_lines[] = $description_line;
+						$description_line_num++;
+					}
+
+					// If there is an empty line between description and first tag, remove it
+					if (!strlen(end($description_lines)))
+					{
+						array_pop($description_lines);
+					}
+
+					$description = trim(implode('<br/>', $description_lines));
 
 					if (isset($this->events[$this->current_event]))
 					{
@@ -316,17 +339,17 @@ class php_exporter
 
 		if ($is_dispatch)
 		{
-			$regex = '#\$([a-z](?:[a-z0-9_]|->)*)';
-			$regex .= '->dispatch\(';
-			$regex .= '\'' . $this->preg_match_event_name() . '\'';
-			$regex .= '\);#';
+			$regex = '#\$[a-z](?:[a-z0-9_]|->)*';
+			$regex .= '->dispatch\((\[)?';
+			$regex .= '\'' . $this->preg_match_event_name() . '(?(1)\', \'(?2))+\'';
+			$regex .= '(?(1)\])\);#';
 		}
 		else
 		{
-			$regex = '#extract\(\$([a-z](?:[a-z0-9_]|->)*)';
-			$regex .= '->trigger_event\(';
-			$regex .= '\'' . $this->preg_match_event_name() . '\'';
-			$regex .= ', compact\(\$vars\)\)\);#';
+			$regex = '#extract\(\$[a-z](?:[a-z0-9_]|->)*';
+			$regex .= '->trigger_event\((\[)?';
+			$regex .= '\'' . $this->preg_match_event_name() . '(?(1)\', \'(?2))+\'';
+			$regex .= '(?(1)\]), compact\(\$vars\)\)\);#';
 		}
 
 		$match = array();
@@ -359,7 +382,7 @@ class php_exporter
 	public function get_vars_from_array()
 	{
 		$line = ltrim($this->file_lines[$this->current_event_line - 1], "\t");
-		if ($line === ');')
+		if ($line === ');' || $line === '];')
 		{
 			$vars_array = $this->get_vars_from_multi_line_array();
 		}
@@ -370,7 +393,7 @@ class php_exporter
 
 		foreach ($vars_array as $var)
 		{
-			if (!preg_match('#^([a-zA-Z_][a-zA-Z0-9_]*)$#', $var))
+			if (!preg_match('#^[a-z_][a-z0-9_]*$#i', $var))
 			{
 				throw new \LogicException("Found invalid var '{$var}' in array for event '{$this->current_event}' in file '{$this->current_file}:{$this->current_event_line}'", 3);
 			}
@@ -392,12 +415,12 @@ class php_exporter
 	public function get_vars_from_single_line_array($line, $throw_multiline = true)
 	{
 		$match = array();
-		preg_match('#^\$vars = array\(\'([a-zA-Z0-9_\' ,]+)\'\);$#', $line, $match);
+		preg_match('#^\$vars = (?:(\[)|array\()\'([a-z0-9_\' ,]+)\'(?(1)\]|\));$#i', $line, $match);
 
-		if (isset($match[1]))
+		if (isset($match[2]))
 		{
-			$vars_array = explode("', '", $match[1]);
-			if ($throw_multiline && sizeof($vars_array) > 6)
+			$vars_array = explode("', '", $match[2]);
+			if ($throw_multiline && count($vars_array) > 6)
 			{
 				throw new \LogicException('Should use multiple lines for $vars definition '
 					. "for event '{$this->current_event}' in file '{$this->current_file}:{$this->current_event_line}'", 2);
@@ -420,7 +443,7 @@ class php_exporter
 	{
 		$current_vars_line = 2;
 		$var_lines = array();
-		while (ltrim($this->file_lines[$this->current_event_line - $current_vars_line], "\t") !== '$vars = array(')
+		while (!in_array(ltrim($this->file_lines[$this->current_event_line - $current_vars_line], "\t"), ['$vars = array(', '$vars = [']))
 		{
 			$var_lines[] = substr(trim($this->file_lines[$this->current_event_line - $current_vars_line]), 0, -1);
 
@@ -460,7 +483,7 @@ class php_exporter
 				if (strpos($var_line, '* @var ') === 0)
 				{
 					$doc_line = explode(' ', $var_line, 5);
-					if (sizeof($doc_line) !== 5)
+					if (count($doc_line) !== 5)
 					{
 						throw new \LogicException("Found invalid line '{$this->file_lines[$this->current_event_line - $current_doc_line]}' "
 						. "for event '{$this->current_event}' in file '{$this->current_file}:{$this->current_event_line}'", 1);
@@ -485,7 +508,7 @@ class php_exporter
 
 		foreach ($doc_vars as $var)
 		{
-			if (!preg_match('#^([a-zA-Z_][a-zA-Z0-9_]*)$#', $var))
+			if (!preg_match('#^[a-z_][a-z0-9_]*$#i', $var))
 			{
 				throw new \LogicException("Found invalid @var '{$var}' in docblock for event "
 					. "'{$this->current_event}' in file '{$this->current_file}:{$this->current_event_line}'", 4);
@@ -707,9 +730,9 @@ class php_exporter
 	{
 		$vars_array = array_unique($vars_array);
 		$vars_docblock = array_unique($vars_docblock);
-		$sizeof_vars_array = sizeof($vars_array);
+		$sizeof_vars_array = count($vars_array);
 
-		if ($sizeof_vars_array !== sizeof($vars_docblock) || $sizeof_vars_array !== sizeof(array_intersect($vars_array, $vars_docblock)))
+		if ($sizeof_vars_array !== count($vars_docblock) || $sizeof_vars_array !== count(array_intersect($vars_array, $vars_docblock)))
 		{
 			throw new \LogicException("\$vars array does not match the list of '@var' tags for event "
 				. "'{$this->current_event}' in file '{$this->current_file}:{$this->current_event_line}'");
diff --git a/phpBB/phpbb/exception/version_check_exception.php b/phpBB/phpbb/exception/version_check_exception.php
new file mode 100644
index 0000000000..0810263ade
--- /dev/null
+++ b/phpBB/phpbb/exception/version_check_exception.php
@@ -0,0 +1,21 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\exception;
+
+/**
+ * Define an exception related to the version checker.
+ */
+class version_check_exception extends runtime_exception
+{
+}
diff --git a/phpBB/phpbb/extension/base.php b/phpBB/phpbb/extension/base.php
index 5bb530bad4..c7778cfed1 100644
--- a/phpBB/phpbb/extension/base.php
+++ b/phpBB/phpbb/extension/base.php
@@ -24,7 +24,7 @@ class base implements \phpbb\extension\extension_interface
 	protected $container;
 
 	/** @var \phpbb\finder */
-	protected $finder;
+	protected $extension_finder;
 
 	/** @var \phpbb\db\migrator */
 	protected $migrator;
@@ -73,9 +73,7 @@ class base implements \phpbb\extension\extension_interface
 	*/
 	public function enable_step($old_state)
 	{
-		$migrations = $this->get_migration_file_list();
-
-		$this->migrator->set_migrations($migrations);
+		$this->get_migration_file_list();
 
 		$this->migrator->update();
 
@@ -103,8 +101,6 @@ class base implements \phpbb\extension\extension_interface
 	{
 		$migrations = $this->get_migration_file_list();
 
-		$this->migrator->set_migrations($migrations);
-
 		foreach ($migrations as $migration)
 		{
 			while ($this->migrator->migration_state($migration) !== false)
@@ -137,6 +133,10 @@ class base implements \phpbb\extension\extension_interface
 
 		$migrations = $this->extension_finder->get_classes_from_files($migrations);
 
+		$this->migrator->set_migrations($migrations);
+
+		$migrations = $this->migrator->get_migrations();
+
 		return $migrations;
 	}
 }
diff --git a/phpBB/phpbb/extension/di/extension_base.php b/phpBB/phpbb/extension/di/extension_base.php
new file mode 100644
index 0000000000..ba74615e70
--- /dev/null
+++ b/phpBB/phpbb/extension/di/extension_base.php
@@ -0,0 +1,138 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\extension\di;
+
+use Symfony\Component\Config\FileLocator;
+use Symfony\Component\Config\Resource\FileResource;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Loader\YamlFileLoader;
+use Symfony\Component\HttpKernel\DependencyInjection\Extension;
+
+/**
+ * Container core extension
+ */
+class extension_base extends Extension
+{
+	/**
+	 * Name of the extension (vendor/name)
+	 *
+	 * @var string
+	 */
+	protected $extension_name;
+
+	/**
+	 * Path to the extension.
+	 *
+	 * @var string
+	 */
+	protected $ext_path;
+
+	/**
+	 * Constructor
+	 *
+	 * @param string $extension_name Name of the extension (vendor/name)
+	 * @param string $ext_path       Path to the extension
+	 */
+	public function __construct($extension_name, $ext_path)
+	{
+		$this->extension_name = $extension_name;
+		$this->ext_path = $ext_path;
+	}
+
+	/**
+	 * Loads a specific configuration.
+	 *
+	 * @param array            $configs   An array of configuration values
+	 * @param ContainerBuilder $container A ContainerBuilder instance
+	 *
+	 * @throws \InvalidArgumentException When provided tag is not defined in this extension
+	 */
+	public function load(array $configs, ContainerBuilder $container)
+	{
+		$this->load_services($container);
+	}
+
+	/**
+	 * Loads the services.yml file.
+	 *
+	 * @param ContainerBuilder $container A ContainerBuilder instance
+	 */
+	protected function load_services(ContainerBuilder $container)
+	{
+		$services_directory = false;
+		$services_file = false;
+
+		if (file_exists($this->ext_path . 'config/' . $container->getParameter('core.environment') . '/container/environment.yml'))
+		{
+			$services_directory = $this->ext_path . 'config/' . $container->getParameter('core.environment') . '/container/';
+			$services_file = 'environment.yml';
+		}
+		else if (!is_dir($this->ext_path . 'config/' . $container->getParameter('core.environment')))
+		{
+			if (file_exists($this->ext_path . 'config/default/container/environment.yml'))
+			{
+				$services_directory = $this->ext_path . 'config/default/container/';
+				$services_file = 'environment.yml';
+			}
+			else if (!is_dir($this->ext_path . 'config/default') && file_exists($this->ext_path . '/config/services.yml'))
+			{
+				$services_directory = $this->ext_path . 'config';
+				$services_file = 'services.yml';
+			}
+		}
+
+		if ($services_directory && $services_file)
+		{
+			$filesystem = new \phpbb\filesystem\filesystem();
+			$loader = new YamlFileLoader($container, new FileLocator($filesystem->realpath($services_directory)));
+			$loader->load($services_file);
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function getConfiguration(array $config, ContainerBuilder $container)
+	{
+		$reflected = new \ReflectionClass($this);
+		$namespace = $reflected->getNamespaceName();
+
+		$class = $namespace . '\\di\configuration';
+		if (class_exists($class))
+		{
+			$r = new \ReflectionClass($class);
+			$container->addResource(new FileResource($r->getFileName()));
+
+			if (!method_exists($class, '__construct'))
+			{
+				$configuration = new $class();
+
+				return $configuration;
+			}
+		}
+
+	}
+
+	/**
+	 * Returns the recommended alias to use in XML.
+	 *
+	 * This alias is also the mandatory prefix to use when using YAML.
+	 *
+	 * @return string The alias
+	 */
+	public function getAlias()
+	{
+		return str_replace('/', '_', $this->extension_name);
+	}
+}
diff --git a/phpBB/phpbb/extension/exception.php b/phpBB/phpbb/extension/exception.php
index 3f7d251a4e..9050449bf1 100644
--- a/phpBB/phpbb/extension/exception.php
+++ b/phpBB/phpbb/extension/exception.php
@@ -16,10 +16,6 @@ namespace phpbb\extension;
 /**
  * Exception class for metadata
  */
-class exception extends \UnexpectedValueException
+class exception extends \phpbb\exception\runtime_exception
 {
-	public function __toString()
-	{
-		return $this->getMessage();
-	}
 }
diff --git a/phpBB/phpbb/extension/manager.php b/phpBB/phpbb/extension/manager.php
index e7e5f83c23..4b4109bd85 100644
--- a/phpBB/phpbb/extension/manager.php
+++ b/phpBB/phpbb/extension/manager.php
@@ -13,6 +13,8 @@
 
 namespace phpbb\extension;
 
+use phpbb\exception\runtime_exception;
+use phpbb\file_downloader;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 
 /**
@@ -26,7 +28,6 @@ class manager
 	protected $db;
 	protected $config;
 	protected $cache;
-	protected $user;
 	protected $php_ext;
 	protected $extensions;
 	protected $extension_table;
@@ -39,15 +40,14 @@ class manager
 	* @param ContainerInterface $container A container
 	* @param \phpbb\db\driver\driver_interface $db A database connection
 	* @param \phpbb\config\config $config Config object
-	* @param \phpbb\filesystem $filesystem
-	* @param \phpbb\user $user User object
+	* @param \phpbb\filesystem\filesystem_interface $filesystem
 	* @param string $extension_table The name of the table holding extensions
 	* @param string $phpbb_root_path Path to the phpbb includes directory.
 	* @param string $php_ext php file extension, defaults to php
-	* @param \phpbb\cache\driver\driver_interface $cache A cache instance or null
+	* @param \phpbb\cache\service $cache A cache instance or null
 	* @param string $cache_name The name of the cache variable, defaults to _ext
 	*/
-	public function __construct(ContainerInterface $container, \phpbb\db\driver\driver_interface $db, \phpbb\config\config $config, \phpbb\filesystem $filesystem, \phpbb\user $user, $extension_table, $phpbb_root_path, $php_ext = 'php', \phpbb\cache\driver\driver_interface $cache = null, $cache_name = '_ext')
+	public function __construct(ContainerInterface $container, \phpbb\db\driver\driver_interface $db, \phpbb\config\config $config, \phpbb\filesystem\filesystem_interface $filesystem, $extension_table, $phpbb_root_path, $php_ext = 'php', \phpbb\cache\service $cache = null, $cache_name = '_ext')
 	{
 		$this->cache = $cache;
 		$this->cache_name = $cache_name;
@@ -58,7 +58,6 @@ class manager
 		$this->filesystem = $filesystem;
 		$this->phpbb_root_path = $phpbb_root_path;
 		$this->php_ext = $php_ext;
-		$this->user = $user;
 
 		$this->extensions = ($this->cache) ? $this->cache->get($this->cache_name) : false;
 
@@ -149,12 +148,16 @@ class manager
 	* Instantiates the metadata manager for the extension with the given name
 	*
 	* @param string $name The extension name
-	* @param \phpbb\template\template $template The template manager or null
 	* @return \phpbb\extension\metadata_manager Instance of the metadata manager
 	*/
-	public function create_extension_metadata_manager($name, \phpbb\template\template $template = null)
+	public function create_extension_metadata_manager($name)
 	{
-		return new \phpbb\extension\metadata_manager($name, $this->config, $this, $template, $this->user, $this->phpbb_root_path);
+		if (!isset($this->extensions[$name]['metadata']))
+		{
+			$metadata = new \phpbb\extension\metadata_manager($name, $this->get_extension_path($name, true));
+			$this->extensions[$name]['metadata'] = $metadata;
+		}
+		return $this->extensions[$name]['metadata'];
 	}
 
 	/**
@@ -170,7 +173,7 @@ class manager
 	public function enable_step($name)
 	{
 		// ignore extensions that are already enabled
-		if (isset($this->extensions[$name]) && $this->extensions[$name]['ext_active'])
+		if ($this->is_enabled($name))
 		{
 			return false;
 		}
@@ -259,8 +262,8 @@ class manager
 	*/
 	public function disable_step($name)
 	{
-		// ignore extensions that are already disabled
-		if (!isset($this->extensions[$name]) || !$this->extensions[$name]['ext_active'])
+		// ignore extensions that are not enabled
+		if (!$this->is_enabled($name))
 		{
 			return false;
 		}
@@ -338,8 +341,8 @@ class manager
 	*/
 	public function purge_step($name)
 	{
-		// ignore extensions that do not exist
-		if (!isset($this->extensions[$name]))
+		// ignore extensions that are not configured
+		if (!$this->is_configured($name))
 		{
 			return false;
 		}
@@ -436,7 +439,7 @@ class manager
 				$ext_name = str_replace(DIRECTORY_SEPARATOR, '/', $ext_name);
 				if ($this->is_available($ext_name))
 				{
-					$available[$ext_name] = $this->phpbb_root_path . 'ext/' . $ext_name . '/';
+					$available[$ext_name] = $this->get_extension_path($ext_name, true);
 				}
 			}
 		}
@@ -450,34 +453,41 @@ class manager
 	* All enabled and disabled extensions are considered configured. A purged
 	* extension that is no longer in the database is not configured.
 	*
+	* @param bool $phpbb_relative Whether the path should be relative to phpbb root
+	*
 	* @return array An array with extension names as keys and and the
 	*               database stored extension information as values
 	*/
-	public function all_configured()
+	public function all_configured($phpbb_relative = true)
 	{
 		$configured = array();
 		foreach ($this->extensions as $name => $data)
 		{
-			$data['ext_path'] = $this->phpbb_root_path . $data['ext_path'];
-			$configured[$name] = $data;
+			if ($this->is_configured($name))
+			{
+				unset($data['metadata']);
+				$data['ext_path'] = ($phpbb_relative ? $this->phpbb_root_path : '') . $data['ext_path'];
+				$configured[$name] = $data;
+			}
 		}
 		return $configured;
 	}
 
 	/**
 	* Retrieves all enabled extensions.
+	* @param bool $phpbb_relative Whether the path should be relative to phpbb root
 	*
 	* @return array An array with extension names as keys and and the
 	*               database stored extension information as values
 	*/
-	public function all_enabled()
+	public function all_enabled($phpbb_relative = true)
 	{
 		$enabled = array();
 		foreach ($this->extensions as $name => $data)
 		{
-			if ($data['ext_active'])
+			if ($this->is_enabled($name))
 			{
-				$enabled[$name] = $this->phpbb_root_path . $data['ext_path'];
+				$enabled[$name] = ($phpbb_relative ? $this->phpbb_root_path : '') . $data['ext_path'];
 			}
 		}
 		return $enabled;
@@ -486,17 +496,19 @@ class manager
 	/**
 	* Retrieves all disabled extensions.
 	*
+	* @param bool $phpbb_relative Whether the path should be relative to phpbb root
+	*
 	* @return array An array with extension names as keys and and the
 	*               database stored extension information as values
 	*/
-	public function all_disabled()
+	public function all_disabled($phpbb_relative = true)
 	{
 		$disabled = array();
 		foreach ($this->extensions as $name => $data)
 		{
-			if (!$data['ext_active'])
+			if ($this->is_disabled($name))
 			{
-				$disabled[$name] = $this->phpbb_root_path . $data['ext_path'];
+				$disabled[$name] = ($phpbb_relative ? $this->phpbb_root_path : '') . $data['ext_path'];
 			}
 		}
 		return $disabled;
@@ -529,7 +541,7 @@ class manager
 	*/
 	public function is_enabled($name)
 	{
-		return isset($this->extensions[$name]) && $this->extensions[$name]['ext_active'];
+		return isset($this->extensions[$name]['ext_active']) && $this->extensions[$name]['ext_active'];
 	}
 
 	/**
@@ -540,7 +552,7 @@ class manager
 	*/
 	public function is_disabled($name)
 	{
-		return isset($this->extensions[$name]) && !$this->extensions[$name]['ext_active'];
+		return isset($this->extensions[$name]['ext_active']) && !$this->extensions[$name]['ext_active'];
 	}
 
 	/**
@@ -554,7 +566,36 @@ class manager
 	*/
 	public function is_configured($name)
 	{
-		return isset($this->extensions[$name]);
+		return isset($this->extensions[$name]['ext_active']);
+	}
+
+	/**
+	* Check the version and return the available updates (for an extension).
+	*
+	* @param \phpbb\extension\metadata_manager $md_manager The metadata manager for the version to check.
+	* @param bool $force_update Ignores cached data. Defaults to false.
+	* @param bool $force_cache Force the use of the cache. Override $force_update.
+	* @param string $stability Force the stability (null by default).
+	* @return array
+	* @throws runtime_exception
+	*/
+	public function version_check(\phpbb\extension\metadata_manager $md_manager, $force_update = false, $force_cache = false, $stability = null)
+	{
+		$meta = $md_manager->get_metadata('all');
+
+		if (!isset($meta['extra']['version-check']))
+		{
+			throw new runtime_exception('NO_VERSIONCHECK');
+		}
+
+		$version_check = $meta['extra']['version-check'];
+
+		$version_helper = new \phpbb\version_helper($this->cache, $this->config, new file_downloader());
+		$version_helper->set_current_version($meta['version']);
+		$version_helper->set_file_location($version_check['host'], $version_check['directory'], $version_check['filename'], isset($version_check['ssl']) ? $version_check['ssl'] : false);
+		$version_helper->force_stability($stability);
+
+		return $version_helper->get_ext_update_on_branch($force_update, $force_cache);
 	}
 
 	/**
diff --git a/phpBB/phpbb/extension/metadata_manager.php b/phpBB/phpbb/extension/metadata_manager.php
index a09f07bed2..60b8db8310 100644
--- a/phpBB/phpbb/extension/metadata_manager.php
+++ b/phpBB/phpbb/extension/metadata_manager.php
@@ -19,36 +19,6 @@ namespace phpbb\extension;
 class metadata_manager
 {
 	/**
-	* phpBB Config instance
-	* @var \phpbb\config\config
-	*/
-	protected $config;
-
-	/**
-	* phpBB Extension Manager
-	* @var \phpbb\extension\manager
-	*/
-	protected $extension_manager;
-
-	/**
-	* phpBB Template instance
-	* @var \phpbb\template\template
-	*/
-	protected $template;
-
-	/**
-	* phpBB User instance
-	* @var \phpbb\user
-	*/
-	protected $user;
-
-	/**
-	* phpBB root path
-	* @var string
-	*/
-	protected $phpbb_root_path;
-
-	/**
 	* Name (including vendor) of the extension
 	* @var string
 	*/
@@ -66,30 +36,18 @@ class metadata_manager
 	*/
 	protected $metadata_file;
 
-	// @codingStandardsIgnoreStart
 	/**
 	* Creates the metadata manager
 	*
 	* @param string				$ext_name			Name (including vendor) of the extension
-	* @param \phpbb\config\config		$config				phpBB Config instance
-	* @param \phpbb\extension\manager	$extension_manager	An instance of the phpBB extension manager
-	* @param \phpbb\template\template	$template			phpBB Template instance or null
-	* @param \phpbb\user 		$user 				User instance
-	* @param string				$phpbb_root_path	Path to the phpbb includes directory.
+	* @param string				$ext_path			Path to the extension directory including root path
 	*/
-	public function __construct($ext_name, \phpbb\config\config $config, \phpbb\extension\manager $extension_manager, \phpbb\template\template $template = null, \phpbb\user $user, $phpbb_root_path)
+	public function __construct($ext_name, $ext_path)
 	{
-		$this->config = $config;
-		$this->extension_manager = $extension_manager;
-		$this->template = $template;
-		$this->user = $user;
-		$this->phpbb_root_path = $phpbb_root_path;
-
 		$this->ext_name = $ext_name;
 		$this->metadata = array();
-		$this->metadata_file = '';
+		$this->metadata_file = $ext_path . 'composer.json';
 	}
-	// @codingStandardsIgnoreEnd
 
 	/**
 	* Processes and gets the metadata requested
@@ -100,7 +58,7 @@ class metadata_manager
 	public function get_metadata($element = 'all')
 	{
 		// Fetch and clean the metadata if not done yet
-		if ($this->metadata_file === '')
+		if ($this->metadata === array())
 		{
 			$this->fetch_metadata_from_file();
 		}
@@ -126,30 +84,25 @@ class metadata_manager
 	}
 
 	/**
-	* Sets the path of the metadata file, gets its contents and cleans loaded file
+	* Gets the metadata file contents and cleans loaded file
 	*
 	* @throws \phpbb\extension\exception
 	*/
 	private function fetch_metadata_from_file()
 	{
-		$ext_filepath = $this->extension_manager->get_extension_path($this->ext_name);
-		$metadata_filepath = $this->phpbb_root_path . $ext_filepath . 'composer.json';
-
-		$this->metadata_file = $metadata_filepath;
-
 		if (!file_exists($this->metadata_file))
 		{
-			throw new \phpbb\extension\exception($this->user->lang('FILE_NOT_FOUND', $this->metadata_file));
+			throw new \phpbb\extension\exception('FILE_NOT_FOUND', array($this->metadata_file));
 		}
 
 		if (!($file_contents = file_get_contents($this->metadata_file)))
 		{
-			throw new \phpbb\extension\exception($this->user->lang('FILE_CONTENT_ERR', $this->metadata_file));
+			throw new \phpbb\extension\exception('FILE_CONTENT_ERR', array($this->metadata_file));
 		}
 
 		if (($metadata = json_decode($file_contents, true)) === null)
 		{
-			throw new \phpbb\extension\exception($this->user->lang('FILE_JSON_DECODE_ERR', $this->metadata_file));
+			throw new \phpbb\extension\exception('FILE_JSON_DECODE_ERR', array($this->metadata_file));
 		}
 
 		array_walk_recursive($metadata, array($this, 'sanitize_json'));
@@ -190,7 +143,7 @@ class metadata_manager
 		{
 			case 'all':
 				$this->validate_enable();
-				// no break
+			// no break
 
 			case 'display':
 				foreach ($fields as $field => $data)
@@ -206,12 +159,12 @@ class metadata_manager
 				{
 					if (!isset($this->metadata[$name]))
 					{
-						throw new \phpbb\extension\exception($this->user->lang('META_FIELD_NOT_SET', $name));
+						throw new \phpbb\extension\exception('META_FIELD_NOT_SET', array($name));
 					}
 
 					if (!preg_match($fields[$name], $this->metadata[$name]))
 					{
-						throw new \phpbb\extension\exception($this->user->lang('META_FIELD_INVALID', $name));
+						throw new \phpbb\extension\exception('META_FIELD_INVALID', array($name));
 					}
 				}
 			break;
@@ -230,14 +183,14 @@ class metadata_manager
 	{
 		if (empty($this->metadata['authors']))
 		{
-			throw new \phpbb\extension\exception($this->user->lang('META_FIELD_NOT_SET', 'authors'));
+			throw new \phpbb\extension\exception('META_FIELD_NOT_SET', array('authors'));
 		}
 
 		foreach ($this->metadata['authors'] as $author)
 		{
 			if (!isset($author['name']))
 			{
-				throw new \phpbb\extension\exception($this->user->lang('META_FIELD_NOT_SET', 'author name'));
+				throw new \phpbb\extension\exception('META_FIELD_NOT_SET', array('author name'));
 			}
 		}
 
@@ -266,7 +219,7 @@ class metadata_manager
 	{
 		if (substr_count($this->ext_name, '/') !== 1 || $this->ext_name != $this->get_metadata('name'))
 		{
-			throw new \phpbb\extension\exception($this->user->lang('EXTENSION_DIR_INVALID'));
+			throw new \phpbb\extension\exception('EXTENSION_DIR_INVALID');
 		}
 
 		return true;
@@ -283,7 +236,7 @@ class metadata_manager
 	{
 		if (!isset($this->metadata['extra']['soft-require']['phpbb/phpbb']))
 		{
-			throw new \phpbb\extension\exception($this->user->lang('META_FIELD_NOT_SET', 'soft-require'));
+			throw new \phpbb\extension\exception('META_FIELD_NOT_SET', array('soft-require'));
 		}
 
 		return true;
@@ -299,45 +252,9 @@ class metadata_manager
 	{
 		if (!isset($this->metadata['require']['php']))
 		{
-			throw new \phpbb\extension\exception($this->user->lang('META_FIELD_NOT_SET', 'require php'));
+			throw new \phpbb\extension\exception('META_FIELD_NOT_SET', array('require php'));
 		}
 
 		return true;
 	}
-
-	/**
-	* Outputs the metadata into the template
-	*
-	* @return null
-	*/
-	public function output_template_data()
-	{
-		$this->template->assign_vars(array(
-			'META_NAME'			=> $this->metadata['name'],
-			'META_TYPE'			=> $this->metadata['type'],
-			'META_DESCRIPTION'	=> (isset($this->metadata['description'])) ? $this->metadata['description'] : '',
-			'META_HOMEPAGE'		=> (isset($this->metadata['homepage'])) ? $this->metadata['homepage'] : '',
-			'META_VERSION'		=> (isset($this->metadata['version'])) ? $this->metadata['version'] : '',
-			'META_TIME'			=> (isset($this->metadata['time'])) ? $this->metadata['time'] : '',
-			'META_LICENSE'		=> $this->metadata['license'],
-
-			'META_REQUIRE_PHP'		=> (isset($this->metadata['require']['php'])) ? $this->metadata['require']['php'] : '',
-			'META_REQUIRE_PHP_FAIL'	=> (isset($this->metadata['require']['php'])) ? false : true,
-
-			'META_REQUIRE_PHPBB'		=> (isset($this->metadata['extra']['soft-require']['phpbb/phpbb'])) ? $this->metadata['extra']['soft-require']['phpbb/phpbb'] : '',
-			'META_REQUIRE_PHPBB_FAIL'	=> (isset($this->metadata['extra']['soft-require']['phpbb/phpbb'])) ? false : true,
-
-			'META_DISPLAY_NAME'	=> (isset($this->metadata['extra']['display-name'])) ? $this->metadata['extra']['display-name'] : '',
-		));
-
-		foreach ($this->metadata['authors'] as $author)
-		{
-			$this->template->assign_block_vars('meta_authors', array(
-				'AUTHOR_NAME'		=> $author['name'],
-				'AUTHOR_EMAIL'		=> (isset($author['email'])) ? $author['email'] : '',
-				'AUTHOR_HOMEPAGE'	=> (isset($author['homepage'])) ? $author['homepage'] : '',
-				'AUTHOR_ROLE'		=> (isset($author['role'])) ? $author['role'] : '',
-			));
-		}
-	}
 }
diff --git a/phpBB/phpbb/feed/attachments_base.php b/phpBB/phpbb/feed/attachments_base.php
index df8f29a626..5d3272e0d9 100644
--- a/phpBB/phpbb/feed/attachments_base.php
+++ b/phpBB/phpbb/feed/attachments_base.php
@@ -16,7 +16,7 @@ namespace phpbb\feed;
 /**
 * Abstract class for feeds displaying attachments
 */
-abstract class attachments_base extends \phpbb\feed\base
+abstract class attachments_base extends base
 {
 	/**
 	* Attachments that may be displayed
diff --git a/phpBB/phpbb/feed/base.php b/phpBB/phpbb/feed/base.php
index eeea0a55df..d4be0dc592 100644
--- a/phpBB/phpbb/feed/base.php
+++ b/phpBB/phpbb/feed/base.php
@@ -1,27 +1,27 @@
 <?php
 /**
-*
-* This file is part of the phpBB Forum Software package.
-*
-* @copyright (c) phpBB Limited <https://www.phpbb.com>
-* @license GNU General Public License, version 2 (GPL-2.0)
-*
-* For full copyright and license information, please see
-* the docs/CREDITS.txt file.
-*
-*/
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
 
 namespace phpbb\feed;
 
 /**
-* Base class with some generic functions and settings.
-*/
-abstract class base
+ * Base class with some generic functions and settings.
+ */
+abstract class base implements feed_interface
 {
 	/**
-	* Feed helper object
-	* @var \phpbb\feed\helper
-	*/
+	 * Feed helper object
+	 * @var \phpbb\feed\helper
+	 */
 	protected $helper;
 
 	/** @var \phpbb\config\config */
@@ -49,47 +49,47 @@ abstract class base
 	protected $phpEx;
 
 	/**
-	* SQL Query to be executed to get feed items
-	*/
-	var $sql = array();
+	 * SQL Query to be executed to get feed items
+	 */
+	protected $sql = array();
 
 	/**
-	* Keys specified for retrieval of title, content, etc.
-	*/
-	var $keys = array();
+	 * Keys specified for retrieval of title, content, etc.
+	 */
+	protected $keys = array();
 
 	/**
-	* Number of items to fetch. Usually overwritten by $config['feed_something']
-	*/
-	var $num_items = 15;
+	 * Number of items to fetch. Usually overwritten by $config['feed_something']
+	 */
+	protected $num_items = 15;
 
 	/**
-	* Separator for title elements to separate items (for example forum / topic)
-	*/
-	var $separator = "\xE2\x80\xA2"; // &bull;
+	 * Separator for title elements to separate items (for example forum / topic)
+	 */
+	protected $separator = "\xE2\x80\xA2"; // &bull;
 
 	/**
-	* Separator for the statistics row (Posted by, post date, replies, etc.)
-	*/
-	var $separator_stats = "\xE2\x80\x94"; // &mdash;
+	 * Separator for the statistics row (Posted by, post date, replies, etc.)
+	 */
+	protected $separator_stats = "\xE2\x80\x94"; // &mdash;
 
 	/** @var mixed Query result handle */
 	protected $result;
 
 	/**
-	* Constructor
-	*
-	* @param \phpbb\feed\helper					$helper		Feed helper
-	* @param \phpbb\config\config				$config		Config object
-	* @param \phpbb\db\driver\driver_interface	$db			Database connection
-	* @param \phpbb\cache\driver\driver_interface	$cache	Cache object
-	* @param \phpbb\user						$user		User object
-	* @param \phpbb\auth\auth					$auth		Auth object
-	* @param \phpbb\content_visibility			$content_visibility		Content visibility object
-	* @param \phpbb\event\dispatcher_interface	$phpbb_dispatcher		Event dispatcher object
-	* @param string								$phpEx		php file extension
-	*/
-	function __construct(
+	 * Constructor
+	 *
+	 * @param \phpbb\feed\helper					$helper		Feed helper
+	 * @param \phpbb\config\config				$config		Config object
+	 * @param \phpbb\db\driver\driver_interface	$db			Database connection
+	 * @param \phpbb\cache\driver\driver_interface	$cache	Cache object
+	 * @param \phpbb\user						$user		User object
+	 * @param \phpbb\auth\auth					$auth		Auth object
+	 * @param \phpbb\content_visibility			$content_visibility		Auth object
+	 * @param \phpbb\event\dispatcher_interface	$phpbb_dispatcher		Event dispatcher object
+	 * @param string								$phpEx		php file extension
+	 */
+	public function __construct(
 		\phpbb\feed\helper $helper,
 		\phpbb\config\config $config,
 		\phpbb\db\driver\driver_interface $db,
@@ -127,23 +127,23 @@ abstract class base
 	}
 
 	/**
-	* Set keys.
-	*/
-	function set_keys()
+	 * {@inheritdoc}
+	 */
+	public function set_keys()
 	{
 	}
 
 	/**
-	* Open feed
-	*/
-	function open()
+	 * {@inheritdoc}
+	 */
+	public function open()
 	{
 	}
 
 	/**
-	* Close feed
-	*/
-	function close()
+	 * {@inheritdoc}
+	 */
+	public function close()
 	{
 		if (!empty($this->result))
 		{
@@ -152,28 +152,62 @@ abstract class base
 	}
 
 	/**
-	* Set key
-	*
-	* @param string $key Key
-	* @param mixed $value Value
-	*/
-	function set($key, $value)
+	 * {@inheritdoc}
+	 */
+	public function set($key, $value)
 	{
 		$this->keys[$key] = $value;
 	}
 
 	/**
-	* Get key
-	*
-	* @param string $key Key
-	* @return mixed
-	*/
-	function get($key)
+	 * {@inheritdoc}
+	 */
+	public function get($key)
 	{
 		return (isset($this->keys[$key])) ? $this->keys[$key] : null;
 	}
 
-	function get_readable_forums()
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_item()
+	{
+		if (!isset($this->result))
+		{
+			if (!$this->get_sql())
+			{
+				return false;
+			}
+
+			$sql_ary = $this->sql;
+
+			/**
+			 * Event to modify the feed item sql
+			 *
+			 * @event core.feed_base_modify_item_sql
+			 * @var	array	sql_ary		The SQL array to get the feed item data
+			 *
+			 * @since 3.1.10-RC1
+			 */
+			$vars = array('sql_ary');
+			extract($this->phpbb_dispatcher->trigger_event('core.feed_base_modify_item_sql', compact($vars)));
+			$this->sql = $sql_ary;
+			unset($sql_ary);
+
+			// Query database
+			$sql = $this->db->sql_build_query('SELECT', $this->sql);
+			$this->result = $this->db->sql_query_limit($sql, $this->num_items);
+		}
+
+		return $this->db->sql_fetchrow($this->result);
+	}
+
+	/**
+	 * Returns the ids of the forums readable by the current user.
+	 *
+	 * @return int[]
+	 */
+	protected function get_readable_forums()
 	{
 		static $forum_ids;
 
@@ -185,7 +219,12 @@ abstract class base
 		return $forum_ids;
 	}
 
-	function get_moderator_approve_forums()
+	/**
+	 * Returns the ids of the forum for which the current user can approve the post in the moderation queue.
+	 *
+	 * @return int[]
+	 */
+	protected function get_moderator_approve_forums()
 	{
 		static $forum_ids;
 
@@ -197,7 +236,13 @@ abstract class base
 		return $forum_ids;
 	}
 
-	function is_moderator_approve_forum($forum_id)
+	/**
+	 * Returns true if the current user can approve the post of the given forum
+	 *
+	 * @param int $forum_id Forum id to check
+	 * @return bool
+	 */
+	protected function is_moderator_approve_forum($forum_id)
 	{
 		static $forum_ids;
 
@@ -209,7 +254,12 @@ abstract class base
 		return (isset($forum_ids[$forum_id])) ? true : false;
 	}
 
-	function get_excluded_forums()
+	/**
+	 * Returns the ids of the forum excluded from the feeds
+	 *
+	 * @return int[]
+	 */
+	protected function get_excluded_forums()
 	{
 		static $forum_ids;
 
@@ -236,51 +286,35 @@ abstract class base
 		return $forum_ids;
 	}
 
-	function is_excluded_forum($forum_id)
+	/**
+	 * Returns true if the given id is in the excluded forums list.
+	 *
+	 * @param int $forum_id Id to check
+	 * @return bool
+	 */
+	protected function is_excluded_forum($forum_id)
 	{
 		$forum_ids = $this->get_excluded_forums();
 
 		return isset($forum_ids[$forum_id]) ? true : false;
 	}
 
-	function get_passworded_forums()
+	/**
+	 * Returns all password protected forum ids the current user is currently NOT authenticated for.
+	 *
+	 * @return array     Array of forum ids
+	 */
+	protected function get_passworded_forums()
 	{
 		return $this->user->get_passworded_forums();
 	}
 
-	function get_item()
-	{
-		if (!isset($this->result))
-		{
-			if (!$this->get_sql())
-			{
-				return false;
-			}
-
-			$sql_ary = $this->sql;
-
-			/**
-			* Event to modify the feed item sql
-			*
-			* @event core.feed_base_modify_item_sql
-			* @var	array	sql_ary		The SQL array to get the feed item data
-			*
-			* @since 3.1.10-RC1
-			*/
-			$vars = array('sql_ary');
-			extract($this->phpbb_dispatcher->trigger_event('core.feed_base_modify_item_sql', compact($vars)));
-			$this->sql = $sql_ary;
-			unset($sql_ary);
-
-			// Query database
-			$sql = $this->db->sql_build_query('SELECT', $this->sql);
-			$this->result = $this->db->sql_query_limit($sql, $this->num_items);
-		}
-
-		return $this->db->sql_fetchrow($this->result);
-	}
-
-	function user_viewprofile($row)
+	/**
+	 * Returns the link to the user profile.
+	 *
+	 * @return string
+	 */
+	protected function user_viewprofile($row)
 	{
 		$author_id = (int) $row[$this->get('author_id')];
 
@@ -293,4 +327,11 @@ abstract class base
 
 		return '<a href="' . $this->helper->append_sid('memberlist.' . $this->phpEx, 'mode=viewprofile&amp;u=' . $author_id) . '">' . $row[$this->get('creator')] . '</a>';
 	}
+
+	/**
+	 * Returns the SQL query used to retrieve the posts of the feed.
+	 *
+	 * @return string SQL SELECT query
+	 */
+	protected abstract function get_sql();
 }
diff --git a/phpBB/phpbb/feed/controller/feed.php b/phpBB/phpbb/feed/controller/feed.php
new file mode 100644
index 0000000000..c0d7bc72ec
--- /dev/null
+++ b/phpBB/phpbb/feed/controller/feed.php
@@ -0,0 +1,411 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\feed\controller;
+
+use phpbb\auth\auth;
+use phpbb\config\config;
+use phpbb\db\driver\driver_interface;
+use \phpbb\event\dispatcher_interface;
+use phpbb\exception\http_exception;
+use phpbb\feed\feed_interface;
+use phpbb\feed\exception\feed_unavailable_exception;
+use phpbb\feed\exception\unauthorized_exception;
+use phpbb\feed\helper as feed_helper;
+use phpbb\controller\helper as controller_helper;
+use phpbb\symfony_request;
+use phpbb\user;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\Routing\Generator\UrlGeneratorInterface;
+
+class feed
+{
+	/**
+	 * @var \Twig_Environment
+	 */
+	protected $template;
+
+	/**
+	 * @var symfony_request
+	 */
+	protected $request;
+
+	/**
+	 * @var controller_helper
+	 */
+	protected $controller_helper;
+
+	/**
+	 * @var config
+	 */
+	protected $config;
+
+	/**
+	 * @var driver_interface
+	 */
+	protected $db;
+
+	/**
+	 * @var ContainerInterface
+	 */
+	protected $container;
+
+	/**
+	 * @var feed_helper
+	 */
+	protected $feed_helper;
+
+	/**
+	 * @var user
+	 */
+	protected $user;
+
+	/**
+	 * @var auth
+	 */
+	protected $auth;
+
+	/**
+	 * @var dispatcher_interface
+	 */
+	protected $phpbb_dispatcher;
+
+	/**
+	 * @var string
+	 */
+	protected $php_ext;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \Twig_Environment $twig
+	 * @param symfony_request $request
+	 * @param controller_helper $controller_helper
+	 * @param config $config
+	 * @param driver_interface $db
+	 * @param ContainerInterface $container
+	 * @param feed_helper $feed_helper
+	 * @param user $user
+	 * @param auth $auth
+	 * @param dispatcher_interface $phpbb_dispatcher
+	 * @param string $php_ext
+	 */
+	public function __construct(\Twig_Environment $twig, symfony_request $request, controller_helper $controller_helper, config $config, driver_interface $db, ContainerInterface $container, feed_helper $feed_helper, user $user, auth $auth, dispatcher_interface $phpbb_dispatcher, $php_ext)
+	{
+		$this->request = $request;
+		$this->controller_helper = $controller_helper;
+		$this->config = $config;
+		$this->db = $db;
+		$this->container = $container;
+		$this->feed_helper = $feed_helper;
+		$this->user = $user;
+		$this->auth = $auth;
+		$this->php_ext = $php_ext;
+		$this->template = $twig;
+		$this->phpbb_dispatcher = $phpbb_dispatcher;
+	}
+
+	/**
+	 * Controller for /feed/forums route
+	 *
+	 * @return Response
+	 *
+	 * @throws http_exception when the feed is disabled
+	 */
+	public function forums()
+	{
+		if (!$this->config['feed_overall_forums'])
+		{
+			$this->send_unavailable();
+		}
+
+		return $this->send_feed($this->container->get('feed.forums'));
+	}
+
+	/**
+	 * Controller for /feed/news route
+	 *
+	 * @return Response
+	 *
+	 * @throws http_exception when the feed is disabled
+	 */
+	public function news()
+	{
+		// Get at least one news forum
+		$sql = 'SELECT forum_id
+					FROM ' . FORUMS_TABLE . '
+					WHERE ' . $this->db->sql_bit_and('forum_options', FORUM_OPTION_FEED_NEWS, '<> 0');
+		$result = $this->db->sql_query_limit($sql, 1, 0, 600);
+		$s_feed_news = (int) $this->db->sql_fetchfield('forum_id');
+		$this->db->sql_freeresult($result);
+
+		if (!$s_feed_news)
+		{
+			$this->send_unavailable();
+		}
+
+		return $this->send_feed($this->container->get('feed.news'));
+	}
+
+	/**
+	 * Controller for /feed/topics route
+	 *
+	 * @return Response
+	 *
+	 * @throws http_exception when the feed is disabled
+	 */
+	public function topics()
+	{
+		if (!$this->config['feed_topics_new'])
+		{
+			$this->send_unavailable();
+		}
+
+		return $this->send_feed($this->container->get('feed.topics'));
+	}
+
+	/**
+	 * Controller for /feed/topics_new route
+	 *
+	 * @return Response
+	 *
+	 * @throws http_exception when the feed is disabled
+	 */
+	public function topics_new()
+	{
+		return $this->topics();
+	}
+
+	/**
+	 * Controller for /feed/topics_active route
+	 *
+	 * @return Response
+	 *
+	 * @throws http_exception when the feed is disabled
+	 */
+	public function topics_active()
+	{
+		if (!$this->config['feed_topics_active'])
+		{
+			$this->send_unavailable();
+		}
+
+		return $this->send_feed($this->container->get('feed.topics_active'));
+	}
+
+	/**
+	 * Controller for /feed/forum/{forum_id} route
+	 *
+	 * @param int $forum_id
+	 *
+	 * @return Response
+	 *
+	 * @throws http_exception when the feed is disabled
+	 */
+	public function forum($forum_id)
+	{
+		if (!$this->config['feed_forum'])
+		{
+			$this->send_unavailable();
+		}
+
+		return $this->send_feed($this->container->get('feed.forum')->set_forum_id($forum_id));
+	}
+
+	/**
+	 * Controller for /feed/topic/{topic_id} route
+	 *
+	 * @param int $topic_id
+	 *
+	 * @return Response
+	 *
+	 * @throws http_exception when the feed is disabled
+	 */
+	public function topic($topic_id)
+	{
+		if (!$this->config['feed_topic'])
+		{
+			$this->send_unavailable();
+		}
+
+		return $this->send_feed($this->container->get('feed.topic')->set_topic_id($topic_id));
+	}
+
+	/**
+	 * Controller for /feed/{mode] route
+	 *
+	 * @return Response
+	 *
+	 * @throws http_exception when the feed is disabled
+	 */
+	public function overall()
+	{
+		if (!$this->config['feed_overall'])
+		{
+			$this->send_unavailable();
+		}
+
+		return $this->send_feed($this->container->get('feed.overall'));
+	}
+
+	/**
+	 * Display a given feed
+	 *
+	 * @param feed_interface $feed
+	 *
+	 * @return Response
+	 */
+	protected function send_feed(feed_interface $feed)
+	{
+		try
+		{
+			return $this->send_feed_do($feed);
+		}
+		catch (feed_unavailable_exception $e)
+		{
+			throw new http_exception(Response::HTTP_NOT_FOUND, $e->getMessage(), $e->get_parameters(), $e);
+		}
+		catch (unauthorized_exception $e)
+		{
+			throw new http_exception(Response::HTTP_FORBIDDEN, $e->getMessage(), $e->get_parameters(), $e);
+		}
+	}
+
+	/**
+	 * Really send the feed
+	 *
+	 * @param feed_interface $feed
+	 *
+	 * @return Response
+	 *
+	 * @throw exception\feed_exception
+	 */
+	protected function send_feed_do(feed_interface $feed)
+	{
+		$feed_updated_time = 0;
+		$item_vars = array();
+
+		$board_url = $this->feed_helper->get_board_url();
+
+		// Open Feed
+		$feed->open();
+
+		// Iterate through items
+		while ($row = $feed->get_item())
+		{
+			/**
+			 * Event to modify the feed row
+			 *
+			 * @event core.feed_modify_feed_row
+			 * @var	int		forum_id	Forum ID
+			 * @var	string	mode		Feeds mode (forums|topics|topics_new|topics_active|news)
+			 * @var	array	row			Array with feed data
+			 * @var	int		topic_id	Topic ID
+			 *
+			 * @since 3.1.10-RC1
+			 */
+			$vars = array('forum_id', 'mode', 'row', 'topic_id');
+			extract($this->phpbb_dispatcher->trigger_event('core.feed_modify_feed_row', compact($vars)));
+
+			// BBCode options to correctly disable urls, smilies, bbcode...
+			if ($feed->get('options') === null)
+			{
+				// Allow all combinations
+				$options = 7;
+
+				if ($feed->get('enable_bbcode') !== null && $feed->get('enable_smilies') !== null && $feed->get('enable_magic_url') !== null)
+				{
+					$options = (($row[$feed->get('enable_bbcode')]) ? OPTION_FLAG_BBCODE : 0) + (($row[$feed->get('enable_smilies')]) ? OPTION_FLAG_SMILIES : 0) + (($row[$feed->get('enable_magic_url')]) ? OPTION_FLAG_LINKS : 0);
+				}
+			}
+			else
+			{
+				$options = $row[$feed->get('options')];
+			}
+
+			$title = (isset($row[$feed->get('title')]) && $row[$feed->get('title')] !== '') ? $row[$feed->get('title')] : ((isset($row[$feed->get('title2')])) ? $row[$feed->get('title2')] : '');
+
+			$published = ($feed->get('published') !== null) ? (int) $row[$feed->get('published')] : 0;
+			$updated = ($feed->get('updated') !== null) ? (int) $row[$feed->get('updated')] : 0;
+
+			$display_attachments = ($this->auth->acl_get('u_download') && $this->auth->acl_get('f_download', $row['forum_id']) && isset($row['post_attachment']) && $row['post_attachment']) ? true : false;
+
+			$item_row = array(
+				'author'		=> ($feed->get('creator') !== null) ? $row[$feed->get('creator')] : '',
+				'published'		=> ($published > 0) ? $this->feed_helper->format_date($published) : '',
+				'updated'		=> ($updated > 0) ? $this->feed_helper->format_date($updated) : '',
+				'link'			=> '',
+				'title'			=> censor_text($title),
+				'category'		=> ($this->config['feed_item_statistics'] && !empty($row['forum_id'])) ? $board_url . '/viewforum.' . $this->php_ext . '?f=' . $row['forum_id'] : '',
+				'category_name'	=> ($this->config['feed_item_statistics'] && isset($row['forum_name'])) ? $row['forum_name'] : '',
+				'description'	=> censor_text($this->feed_helper->generate_content($row[$feed->get('text')], $row[$feed->get('bbcode_uid')], $row[$feed->get('bitfield')], $options, $row['forum_id'], ($display_attachments ? $feed->get_attachments($row['post_id']) : array()))),
+				'statistics'	=> '',
+			);
+
+			// Adjust items, fill link, etc.
+			$feed->adjust_item($item_row, $row);
+
+			$item_vars[] = $item_row;
+
+			$feed_updated_time = max($feed_updated_time, $published, $updated);
+		}
+
+		// If we do not have any items at all, sending the current time is better than sending no time.
+		if (!$feed_updated_time)
+		{
+			$feed_updated_time = time();
+		}
+
+		$feed->close();
+
+		$content = $this->template->render('feed.xml.twig', array(
+			// Some default assignments
+			// FEED_IMAGE is not used (atom)
+			'FEED_IMAGE'			=> '',
+			'SELF_LINK'				=> $this->controller_helper->route($this->request->attributes->get('_route'), $this->request->attributes->get('_route_params'), true, '', UrlGeneratorInterface::ABSOLUTE_URL),
+			'FEED_LINK'				=> $board_url . '/index.' . $this->php_ext,
+			'FEED_TITLE'			=> $this->config['sitename'],
+			'FEED_SUBTITLE'			=> $this->config['site_desc'],
+			'FEED_UPDATED'			=> $this->feed_helper->format_date($feed_updated_time),
+			'FEED_LANG'				=> $this->user->lang['USER_LANG'],
+			'FEED_AUTHOR'			=> $this->config['sitename'],
+
+			// Feed entries
+			'FEED_ROWS'				=> $item_vars,
+		));
+
+		$response = new Response($content);
+		$response->headers->set('Content-Type', 'application/atom+xml');
+		$response->setCharset('UTF-8');
+		$response->setLastModified(new \DateTime('@' . $feed_updated_time));
+
+		if (!empty($this->user->data['is_bot']))
+		{
+			// Let reverse proxies know we detected a bot.
+			$response->headers->set('X-PHPBB-IS-BOT', 'yes');
+		}
+
+		return $response;
+	}
+
+	/**
+	 * Throw and exception saying that the feed isn't available
+	 *
+	 * @throw http_exception
+	 */
+	protected function send_unavailable()
+	{
+		throw new http_exception(404, 'FEATURE_NOT_AVAILABLE');
+	}
+}
diff --git a/phpBB/phpbb/feed/exception/feed_exception.php b/phpBB/phpbb/feed/exception/feed_exception.php
new file mode 100644
index 0000000000..c9c888211e
--- /dev/null
+++ b/phpBB/phpbb/feed/exception/feed_exception.php
@@ -0,0 +1,21 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\feed\exception;
+
+use phpbb\exception\runtime_exception;
+
+abstract class feed_exception extends runtime_exception
+{
+
+}
diff --git a/phpBB/phpbb/feed/exception/feed_unavailable_exception.php b/phpBB/phpbb/feed/exception/feed_unavailable_exception.php
new file mode 100644
index 0000000000..4b6605b47d
--- /dev/null
+++ b/phpBB/phpbb/feed/exception/feed_unavailable_exception.php
@@ -0,0 +1,19 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\feed\exception;
+
+abstract class feed_unavailable_exception extends feed_exception
+{
+
+}
diff --git a/phpBB/phpbb/feed/exception/no_feed_exception.php b/phpBB/phpbb/feed/exception/no_feed_exception.php
new file mode 100644
index 0000000000..af6357b74c
--- /dev/null
+++ b/phpBB/phpbb/feed/exception/no_feed_exception.php
@@ -0,0 +1,22 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\feed\exception;
+
+class no_feed_exception extends feed_unavailable_exception
+{
+	public function __construct(\Exception $previous = null, $code = 0)
+	{
+		parent::__construct('NO_FEED', array(), $previous, $code);
+	}
+}
diff --git a/phpBB/phpbb/feed/exception/no_forum_exception.php b/phpBB/phpbb/feed/exception/no_forum_exception.php
new file mode 100644
index 0000000000..a60832957a
--- /dev/null
+++ b/phpBB/phpbb/feed/exception/no_forum_exception.php
@@ -0,0 +1,22 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\feed\exception;
+
+class no_forum_exception extends feed_unavailable_exception
+{
+	public function __construct($forum_id, \Exception $previous = null, $code = 0)
+	{
+		parent::__construct('NO_FORUM', array($forum_id), $previous, $code);
+	}
+}
diff --git a/phpBB/phpbb/feed/exception/no_topic_exception.php b/phpBB/phpbb/feed/exception/no_topic_exception.php
new file mode 100644
index 0000000000..b961a65d1c
--- /dev/null
+++ b/phpBB/phpbb/feed/exception/no_topic_exception.php
@@ -0,0 +1,22 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\feed\exception;
+
+class no_topic_exception extends feed_unavailable_exception
+{
+	public function __construct($topic_id, \Exception $previous = null, $code = 0)
+	{
+		parent::__construct('NO_TOPIC', array($topic_id), $previous, $code);
+	}
+}
diff --git a/phpBB/phpbb/feed/exception/unauthorized_exception.php b/phpBB/phpbb/feed/exception/unauthorized_exception.php
new file mode 100644
index 0000000000..7868975779
--- /dev/null
+++ b/phpBB/phpbb/feed/exception/unauthorized_exception.php
@@ -0,0 +1,19 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\feed\exception;
+
+abstract class unauthorized_exception extends feed_exception
+{
+
+}
diff --git a/phpBB/phpbb/feed/exception/unauthorized_forum_exception.php b/phpBB/phpbb/feed/exception/unauthorized_forum_exception.php
new file mode 100644
index 0000000000..4384c7b39b
--- /dev/null
+++ b/phpBB/phpbb/feed/exception/unauthorized_forum_exception.php
@@ -0,0 +1,22 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\feed\exception;
+
+class unauthorized_forum_exception extends unauthorized_exception
+{
+	public function __construct($forum_id, \Exception $previous = null, $code = 0)
+	{
+		parent::__construct('SORRY_AUTH_READ', array($forum_id), $previous, $code);
+	}
+}
diff --git a/phpBB/phpbb/feed/exception/unauthorized_topic_exception.php b/phpBB/phpbb/feed/exception/unauthorized_topic_exception.php
new file mode 100644
index 0000000000..f49f0a0476
--- /dev/null
+++ b/phpBB/phpbb/feed/exception/unauthorized_topic_exception.php
@@ -0,0 +1,22 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\feed\exception;
+
+class unauthorized_topic_exception extends unauthorized_exception
+{
+	public function __construct($topic_id, \Exception $previous = null, $code = 0)
+	{
+		parent::__construct('SORRY_AUTH_READ_TOPIC', array($topic_id), $previous, $code);
+	}
+}
diff --git a/phpBB/phpbb/feed/factory.php b/phpBB/phpbb/feed/factory.php
deleted file mode 100644
index f364f06d03..0000000000
--- a/phpBB/phpbb/feed/factory.php
+++ /dev/null
@@ -1,127 +0,0 @@
-<?php
-/**
-*
-* This file is part of the phpBB Forum Software package.
-*
-* @copyright (c) phpBB Limited <https://www.phpbb.com>
-* @license GNU General Public License, version 2 (GPL-2.0)
-*
-* For full copyright and license information, please see
-* the docs/CREDITS.txt file.
-*
-*/
-
-namespace phpbb\feed;
-
-use Symfony\Component\DependencyInjection\ContainerInterface;
-
-/**
-* Factory class to return correct object
-*/
-class factory
-{
-	/**
-	* Service container object
-	* @var ContainerInterface
-	*/
-	protected $container;
-
-	/** @var \phpbb\config\config */
-	protected $config;
-
-	/** @var \phpbb\db\driver\driver_interface */
-	protected $db;
-
-	/**
-	* Constructor
-	*
-	* @param ContainerInterface					$container	Container object
-	* @param \phpbb\config\config				$config		Config object
-	* @param \phpbb\db\driver\driver_interface	$db			Database connection
-	*/
-	public function __construct(ContainerInterface $container, \phpbb\config\config $config, \phpbb\db\driver\driver_interface $db)
-	{
-		$this->container = $container;
-		$this->config = $config;
-		$this->db = $db;
-	}
-
-	/**
-	* Return correct object for specified mode
-	*
-	* @param string	$mode		The feeds mode.
-	* @param int	$forum_id	Forum id specified by the script if forum feed provided.
-	* @param int	$topic_id	Topic id specified by the script if topic feed provided.
-	*
-	* @return object	Returns correct feeds object for specified mode.
-	*/
-	function get_feed($mode, $forum_id, $topic_id)
-	{
-		switch ($mode)
-		{
-			case 'forums':
-				if (!$this->config['feed_overall_forums'])
-				{
-					return false;
-				}
-
-				return $this->container->get('feed.forums');
-			break;
-
-			case 'topics':
-			case 'topics_new':
-				if (!$this->config['feed_topics_new'])
-				{
-					return false;
-				}
-
-				return $this->container->get('feed.topics');
-			break;
-
-			case 'topics_active':
-				if (!$this->config['feed_topics_active'])
-				{
-					return false;
-				}
-
-				return $this->container->get('feed.topics_active');
-			break;
-
-			case 'news':
-				// Get at least one news forum
-				$sql = 'SELECT forum_id
-					FROM ' . FORUMS_TABLE . '
-					WHERE ' . $this->db->sql_bit_and('forum_options', FORUM_OPTION_FEED_NEWS, '<> 0');
-				$result = $this->db->sql_query_limit($sql, 1, 0, 600);
-				$s_feed_news = (int) $this->db->sql_fetchfield('forum_id');
-				$this->db->sql_freeresult($result);
-
-				if (!$s_feed_news)
-				{
-					return false;
-				}
-
-				return $this->container->get('feed.news');
-			break;
-
-			default:
-				if ($topic_id && $this->config['feed_topic'])
-				{
-					return $this->container->get('feed.topic')
-								->set_topic_id($topic_id);
-				}
-				else if ($forum_id && $this->config['feed_forum'])
-				{
-					return $this->container->get('feed.forum')
-								->set_forum_id($forum_id);
-				}
-				else if ($this->config['feed_overall'])
-				{
-				return $this->container->get('feed.overall');
-				}
-
-				return false;
-			break;
-		}
-	}
-}
diff --git a/phpBB/phpbb/feed/feed_interface.php b/phpBB/phpbb/feed/feed_interface.php
new file mode 100644
index 0000000000..c185cd249c
--- /dev/null
+++ b/phpBB/phpbb/feed/feed_interface.php
@@ -0,0 +1,67 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\feed;
+
+/**
+ * Interface implemented by all feeds types
+ */
+interface feed_interface
+{
+	/**
+	 * Set keys.
+	 */
+	public function set_keys();
+
+	/**
+	 * Open feed
+	 */
+	public function open();
+
+	/**
+	 * Close feed
+	 */
+	public function close();
+
+	/**
+	 * Set key
+	 *
+	 * @param string $key Key
+	 * @param mixed $value Value
+	 */
+	public function set($key, $value);
+
+	/**
+	 * Get key
+	 *
+	 * @param string $key Key
+	 * @return mixed
+	 */
+	public function get($key);
+
+	/**
+	 * Get the next post in the feed
+	 *
+	 * @return array
+	 */
+	public function get_item();
+
+	/**
+	 * Adjust a feed entry
+	 *
+	 * @param $item_row
+	 * @param $row
+	 * @return array
+	 */
+	public function adjust_item(&$item_row, &$row);
+}
diff --git a/phpBB/phpbb/feed/forum.php b/phpBB/phpbb/feed/forum.php
index 6aba12a147..0c142e8cc8 100644
--- a/phpBB/phpbb/feed/forum.php
+++ b/phpBB/phpbb/feed/forum.php
@@ -1,35 +1,39 @@
 <?php
 /**
-*
-* This file is part of the phpBB Forum Software package.
-*
-* @copyright (c) phpBB Limited <https://www.phpbb.com>
-* @license GNU General Public License, version 2 (GPL-2.0)
-*
-* For full copyright and license information, please see
-* the docs/CREDITS.txt file.
-*
-*/
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
 
 namespace phpbb\feed;
 
+use phpbb\feed\exception\no_feed_exception;
+use phpbb\feed\exception\no_forum_exception;
+use phpbb\feed\exception\unauthorized_forum_exception;
+
 /**
-* Forum feed
-*
-* This will give you the last {$this->num_items} posts made
-* within a specific forum.
-*/
-class forum extends \phpbb\feed\post_base
+ * Forum feed
+ *
+ * This will give you the last {$this->num_items} posts made
+ * within a specific forum.
+ */
+class forum extends post_base
 {
-	var $forum_id		= 0;
-	var $forum_data		= array();
+	protected $forum_id		= 0;
+	protected $forum_data	= array();
 
 	/**
-	* Set the Forum ID
-	*
-	* @param int	$forum_id			Forum ID
-	* @return	\phpbb\feed\forum
-	*/
+	 * Set the Forum ID
+	 *
+	 * @param int	$forum_id			Forum ID
+	 * @return	\phpbb\feed\forum
+	 */
 	public function set_forum_id($forum_id)
 	{
 		$this->forum_id = (int) $forum_id;
@@ -37,7 +41,10 @@ class forum extends \phpbb\feed\post_base
 		return $this;
 	}
 
-	function open()
+	/**
+	 * {@inheritdoc}
+	 */
+	public function open()
 	{
 		// Check if forum exists
 		$sql = 'SELECT forum_id, forum_name, forum_password, forum_type, forum_options
@@ -49,25 +56,33 @@ class forum extends \phpbb\feed\post_base
 
 		if (empty($this->forum_data))
 		{
-			trigger_error('NO_FORUM');
+			throw new no_forum_exception($this->forum_id);
 		}
 
 		// Forum needs to be postable
 		if ($this->forum_data['forum_type'] != FORUM_POST)
 		{
-			trigger_error('NO_FEED');
+			throw new no_feed_exception();
 		}
 
 		// Make sure forum is not excluded from feed
 		if (phpbb_optionget(FORUM_OPTION_FEED_EXCLUDE, $this->forum_data['forum_options']))
 		{
-			trigger_error('NO_FEED');
+			throw new no_feed_exception();
 		}
 
 		// Make sure we can read this forum
 		if (!$this->auth->acl_get('f_read', $this->forum_id))
 		{
-			trigger_error('SORRY_AUTH_READ');
+			if ($this->user->data['user_id'] != ANONYMOUS)
+			{
+				send_status_line(403, 'Forbidden');
+			}
+			else
+			{
+				send_status_line(401, 'Unauthorized');
+			}
+			throw new unauthorized_forum_exception($this->forum_id);
 		}
 
 		// Make sure forum is not passworded or user is authed
@@ -77,7 +92,15 @@ class forum extends \phpbb\feed\post_base
 
 			if (isset($forum_ids_passworded[$this->forum_id]))
 			{
-				trigger_error('SORRY_AUTH_READ');
+				if ($this->user->data['user_id'] != ANONYMOUS)
+				{
+					send_status_line(403, 'Forbidden');
+				}
+				else
+				{
+					send_status_line(401, 'Unauthorized');
+				}
+				throw new unauthorized_forum_exception($this->forum_id);
 			}
 
 			unset($forum_ids_passworded);
@@ -86,7 +109,10 @@ class forum extends \phpbb\feed\post_base
 		parent::open();
 	}
 
-	function get_sql()
+	/**
+	 * {@inheritdoc}
+	 */
+	protected function get_sql()
 	{
 		// Determine topics with recent activity
 		$sql = 'SELECT topic_id, topic_last_post_time
@@ -116,7 +142,7 @@ class forum extends \phpbb\feed\post_base
 
 		$this->sql = array(
 			'SELECT'	=>	'p.post_id, p.topic_id, p.post_time, p.post_edit_time, p.post_visibility, p.post_subject, p.post_text, p.bbcode_bitfield, p.bbcode_uid, p.enable_bbcode, p.enable_smilies, p.enable_magic_url, p.post_attachment, ' .
-							'u.username, u.user_id',
+				'u.username, u.user_id',
 			'FROM'		=> array(
 				POSTS_TABLE		=> 'p',
 				USERS_TABLE		=> 'u',
@@ -131,7 +157,10 @@ class forum extends \phpbb\feed\post_base
 		return true;
 	}
 
-	function adjust_item(&$item_row, &$row)
+	/**
+	 * {@inheritdoc}
+	 */
+	public function adjust_item(&$item_row, &$row)
 	{
 		parent::adjust_item($item_row, $row);
 
@@ -139,7 +168,10 @@ class forum extends \phpbb\feed\post_base
 		$item_row['forum_id'] = $this->forum_id;
 	}
 
-	function get_item()
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_item()
 	{
 		return ($row = parent::get_item()) ? array_merge($this->forum_data, $row) : $row;
 	}
diff --git a/phpBB/phpbb/feed/forums.php b/phpBB/phpbb/feed/forums.php
index ee14a5bc76..92f2b2dd4d 100644
--- a/phpBB/phpbb/feed/forums.php
+++ b/phpBB/phpbb/feed/forums.php
@@ -1,29 +1,32 @@
 <?php
 /**
-*
-* This file is part of the phpBB Forum Software package.
-*
-* @copyright (c) phpBB Limited <https://www.phpbb.com>
-* @license GNU General Public License, version 2 (GPL-2.0)
-*
-* For full copyright and license information, please see
-* the docs/CREDITS.txt file.
-*
-*/
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
 
 namespace phpbb\feed;
 
 /**
-* 'All Forums' feed
-*
-* This will give you a list of all postable forums where feeds are enabled
-* including forum description, topic stats and post stats
-*/
-class forums extends \phpbb\feed\base
+ * 'All Forums' feed
+ *
+ * This will give you a list of all postable forums where feeds are enabled
+ * including forum description, topic stats and post stats
+ */
+class forums extends base
 {
-	var $num_items	= 0;
+	protected $num_items	= 0;
 
-	function set_keys()
+	/**
+	 * {@inheritdoc}
+	 */
+	public function set_keys()
 	{
 		$this->set('title',		'forum_name');
 		$this->set('text',		'forum_desc');
@@ -33,7 +36,10 @@ class forums extends \phpbb\feed\base
 		$this->set('options',	'forum_desc_options');
 	}
 
-	function get_sql()
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_sql()
 	{
 		$in_fid_ary = array_diff($this->get_readable_forums(), $this->get_excluded_forums());
 		if (empty($in_fid_ary))
@@ -55,7 +61,10 @@ class forums extends \phpbb\feed\base
 		return true;
 	}
 
-	function adjust_item(&$item_row, &$row)
+	/**
+	 * {@inheritdoc}
+	 */
+	public function adjust_item(&$item_row, &$row)
 	{
 		$item_row['link'] = $this->helper->append_sid('viewforum.' . $this->phpEx, 'f=' . $row['forum_id']);
 
diff --git a/phpBB/phpbb/feed/helper.php b/phpBB/phpbb/feed/helper.php
index f2030f5ced..7d50b7ce7d 100644
--- a/phpBB/phpbb/feed/helper.php
+++ b/phpBB/phpbb/feed/helper.php
@@ -1,54 +1,65 @@
 <?php
 /**
-*
-* This file is part of the phpBB Forum Software package.
-*
-* @copyright (c) phpBB Limited <https://www.phpbb.com>
-* @license GNU General Public License, version 2 (GPL-2.0)
-*
-* For full copyright and license information, please see
-* the docs/CREDITS.txt file.
-*
-*/
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
 
 namespace phpbb\feed;
 
+use phpbb\config\config;
+use phpbb\path_helper;
+use phpbb\textformatter\s9e\renderer;
+use phpbb\user;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
 /**
-* Class with some helpful functions used in feeds
-*/
+ * Class with some helpful functions used in feeds
+ */
 class helper
 {
-	/** @var \phpbb\config\config */
+	/** @var config */
 	protected $config;
 
-	/** @var \phpbb\user */
-	protected $user;
+	/** @var ContainerInterface */
+	protected $container;
 
-	/** @var string */
-	protected $phpbb_root_path;
+	/** @var path_helper */
+	protected $path_helper;
 
-	/** @var string */
-	protected $phpEx;
+	/** @var renderer */
+	protected $renderer;
+
+	/** @var user */
+	protected $user;
 
 	/**
-	* Constructor
-	*
-	* @param	\phpbb\config\config	$config		Config object
-	* @param	\phpbb\user		$user		User object
-	* @param	string	$phpbb_root_path	Root path
-	* @param	string	$phpEx				PHP file extension
-	*/
-	public function __construct(\phpbb\config\config $config, \phpbb\user $user, $phpbb_root_path, $phpEx)
+	 * Constructor
+	 *
+	 * @param	config				$config			Config object
+	 * @param	ContainerInterface	$container		Service container object
+	 * @param	path_helper			$path_helper 	Path helper object
+	 * @param	renderer			$renderer		TextFormatter renderer object
+	 * @param	user				$user			User object
+	 */
+	public function __construct(config $config, ContainerInterface $container, path_helper $path_helper, renderer $renderer, user $user)
 	{
 		$this->config = $config;
+		$this->container = $container;
+		$this->path_helper = $path_helper;
+		$this->renderer = $renderer;
 		$this->user = $user;
-		$this->phpbb_root_path = $phpbb_root_path;
-		$this->phpEx = $phpEx;
 	}
 
 	/**
-	* Run links through append_sid(), prepend generate_board_url() and remove session id
-	*/
+	 * Returns the board url (and caches it in the function)
+	 */
 	public function get_board_url()
 	{
 		static $board_url;
@@ -62,16 +73,16 @@ class helper
 	}
 
 	/**
-	* Run links through append_sid(), prepend generate_board_url() and remove session id
-	*/
+	 * Run links through append_sid(), prepend generate_board_url() and remove session id
+	 */
 	public function append_sid($url, $params)
 	{
 		return append_sid($this->get_board_url() . '/' . $url, $params, true, '');
 	}
 
 	/**
-	* Generate ISO 8601 date string (RFC 3339)
-	*/
+	 * Generate ISO 8601 date string (RFC 3339)
+	 */
 	public function format_date($time)
 	{
 		static $zone_offset;
@@ -87,16 +98,16 @@ class helper
 	}
 
 	/**
-	* Generate text content
-	*
-	* @param string $content is feed text content
-	* @param string $uid is bbcode_uid
-	* @param string $bitfield is bbcode bitfield
-	* @param int $options bbcode flag options
-	* @param int $forum_id is the forum id
-	* @param array $post_attachments is an array containing the attachments and their respective info
-	* @return string the html content to be printed for the feed
-	*/
+	 * Generate text content
+	 *
+	 * @param string $content is feed text content
+	 * @param string $uid is bbcode_uid
+	 * @param string $bitfield is bbcode bitfield
+	 * @param int $options bbcode flag options
+	 * @param int $forum_id is the forum id
+	 * @param array $post_attachments is an array containing the attachments and their respective info
+	 * @return string the html content to be printed for the feed
+	 */
 	public function generate_content($content, $uid, $bitfield, $options, $forum_id, $post_attachments)
 	{
 		if (empty($content))
@@ -104,16 +115,12 @@ class helper
 			return '';
 		}
 
-		// Prepare some bbcodes for better parsing
-		$content	= preg_replace("#\[quote(=&quot;.*?&quot;)?:$uid\]\s*(.*?)\s*\[/quote:$uid\]#si", "[quote$1:$uid]<br />$2<br />[/quote:$uid]", $content);
+		// Setup our own quote_helper to remove all attributes from quotes
+		$this->renderer->configure_quote_helper($this->container->get('feed.quote_helper'));
 
-		$content = generate_text_for_display($content, $uid, $bitfield, $options);
-
-		// Add newlines
-		$content = str_replace('<br />', '<br />' . "\n", $content);
+		$this->renderer->set_smilies_path($this->get_board_url() . '/' . $this->config['smilies_path']);
 
-		// Convert smiley Relative paths to Absolute path, Windows style
-		$content = str_replace($this->phpbb_root_path . $this->config['smilies_path'], $this->get_board_url() . '/' . $this->config['smilies_path'], $content);
+		$content = generate_text_for_display($content, $uid, $bitfield, $options);
 
 		// Remove "Select all" link and mouse events
 		$content = str_replace('<a href="#" onclick="selectCode(this); return false;">' . $this->user->lang['SELECT_ALL_CODE'] . '</a>', '', $content);
@@ -122,16 +129,16 @@ class helper
 		// Firefox does not support CSS for feeds, though
 
 		// Remove font sizes
-	//	$content = preg_replace('#<span style="font-size: [0-9]+%; line-height: [0-9]+%;">([^>]+)</span>#iU', '\1', $content);
+		//	$content = preg_replace('#<span style="font-size: [0-9]+%; line-height: [0-9]+%;">([^>]+)</span>#iU', '\1', $content);
 
 		// Make text strong :P
-	//	$content = preg_replace('#<span style="font-weight: bold?">(.*?)</span>#iU', '<strong>\1</strong>', $content);
+		//	$content = preg_replace('#<span style="font-weight: bold?">(.*?)</span>#iU', '<strong>\1</strong>', $content);
 
 		// Italic
-	//	$content = preg_replace('#<span style="font-style: italic?">([^<]+)</span>#iU', '<em>\1</em>', $content);
+		//	$content = preg_replace('#<span style="font-style: italic?">([^<]+)</span>#iU', '<em>\1</em>', $content);
 
 		// Underline
-	//	$content = preg_replace('#<span style="text-decoration: underline?">([^<]+)</span>#iU', '<u>\1</u>', $content);
+		//	$content = preg_replace('#<span style="text-decoration: underline?">([^<]+)</span>#iU', '<u>\1</u>', $content);
 
 		// Remove embed Windows Media Streams
 		$content	= preg_replace( '#<\!--\[if \!IE\]>-->([^[]+)<\!--<!\[endif\]-->#si', '', $content);
@@ -152,7 +159,7 @@ class helper
 			$content .= implode('<br />', $post_attachments);
 
 			// Convert attachments' relative path to absolute path
-			$content = str_replace($this->phpbb_root_path . 'download/file.' . $this->phpEx, $this->get_board_url() . '/download/file.' . $this->phpEx, $content);
+			$content = str_replace($this->path_helper->get_web_root_path() . 'download/file.' . $this->path_helper->get_php_ext(), $this->get_board_url() . '/download/file.' . $this->path_helper->get_php_ext(), $content);
 		}
 
 		// Remove Comments from inline attachments [ia]
diff --git a/phpBB/phpbb/feed/news.php b/phpBB/phpbb/feed/news.php
index 5d4786518b..13ca82c093 100644
--- a/phpBB/phpbb/feed/news.php
+++ b/phpBB/phpbb/feed/news.php
@@ -1,27 +1,31 @@
 <?php
 /**
-*
-* This file is part of the phpBB Forum Software package.
-*
-* @copyright (c) phpBB Limited <https://www.phpbb.com>
-* @license GNU General Public License, version 2 (GPL-2.0)
-*
-* For full copyright and license information, please see
-* the docs/CREDITS.txt file.
-*
-*/
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
 
 namespace phpbb\feed;
 
 /**
-* News feed
-*
-* This will give you {$this->num_items} first posts
-* of all topics in the selected news forums.
-*/
-class news extends \phpbb\feed\topic_base
+ * News feed
+ *
+ * This will give you {$this->num_items} first posts
+ * of all topics in the selected news forums.
+ */
+class news extends topic_base
 {
-	function get_news_forums()
+	/**
+	 * Returns the ids of the 'news forums'
+	 * @return int[]
+	 */
+	private function get_news_forums()
 	{
 		static $forum_ids;
 
@@ -48,7 +52,10 @@ class news extends \phpbb\feed\topic_base
 		return $forum_ids;
 	}
 
-	function get_sql()
+	/**
+	 * {@inheritdoc}
+	 */
+	protected function get_sql()
 	{
 		// Determine forum ids
 		$in_fid_ary = array_intersect($this->get_news_forums(), $this->get_readable_forums());
diff --git a/phpBB/phpbb/feed/overall.php b/phpBB/phpbb/feed/overall.php
index 1176a9c182..b083df922d 100644
--- a/phpBB/phpbb/feed/overall.php
+++ b/phpBB/phpbb/feed/overall.php
@@ -1,27 +1,30 @@
 <?php
 /**
-*
-* This file is part of the phpBB Forum Software package.
-*
-* @copyright (c) phpBB Limited <https://www.phpbb.com>
-* @license GNU General Public License, version 2 (GPL-2.0)
-*
-* For full copyright and license information, please see
-* the docs/CREDITS.txt file.
-*
-*/
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
 
 namespace phpbb\feed;
 
 /**
-* Board wide feed (aka overall feed)
-*
-* This will give you the newest {$this->num_items} posts
-* from the whole board.
-*/
-class overall extends \phpbb\feed\post_base
+ * Board wide feed (aka overall feed)
+ *
+ * This will give you the newest {$this->num_items} posts
+ * from the whole board.
+ */
+class overall extends post_base
 {
-	function get_sql()
+	/**
+	 * {@inheritdoc}
+	 */
+	protected function get_sql()
 	{
 		$forum_ids = array_diff($this->get_readable_forums(), $this->get_excluded_forums(), $this->get_passworded_forums());
 		if (empty($forum_ids))
@@ -57,8 +60,8 @@ class overall extends \phpbb\feed\post_base
 		// Get the actual data
 		$this->sql = array(
 			'SELECT'	=>	'f.forum_id, f.forum_name, ' .
-							'p.post_id, p.topic_id, p.post_time, p.post_edit_time, p.post_visibility, p.post_subject, p.post_text, p.bbcode_bitfield, p.bbcode_uid, p.enable_bbcode, p.enable_smilies, p.enable_magic_url, p.post_attachment, ' .
-							'u.username, u.user_id',
+				'p.post_id, p.topic_id, p.post_time, p.post_edit_time, p.post_visibility, p.post_subject, p.post_text, p.bbcode_bitfield, p.bbcode_uid, p.enable_bbcode, p.enable_smilies, p.enable_magic_url, p.post_attachment, ' .
+				'u.username, u.user_id',
 			'FROM'		=> array(
 				USERS_TABLE		=> 'u',
 				POSTS_TABLE		=> 'p',
@@ -79,7 +82,10 @@ class overall extends \phpbb\feed\post_base
 		return true;
 	}
 
-	function adjust_item(&$item_row, &$row)
+	/**
+	 * {@inheritdoc}
+	 */
+	public function adjust_item(&$item_row, &$row)
 	{
 		parent::adjust_item($item_row, $row);
 
diff --git a/phpBB/phpbb/feed/post_base.php b/phpBB/phpbb/feed/post_base.php
index 011775b6af..f6dc39cbec 100644
--- a/phpBB/phpbb/feed/post_base.php
+++ b/phpBB/phpbb/feed/post_base.php
@@ -1,27 +1,29 @@
 <?php
 /**
-*
-* This file is part of the phpBB Forum Software package.
-*
-* @copyright (c) phpBB Limited <https://www.phpbb.com>
-* @license GNU General Public License, version 2 (GPL-2.0)
-*
-* For full copyright and license information, please see
-* the docs/CREDITS.txt file.
-*
-*/
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
 
 namespace phpbb\feed;
 
 /**
-* Abstract class for post based feeds
-*/
-abstract class post_base extends \phpbb\feed\attachments_base
+ * Abstract class for post based feeds
+ */
+abstract class post_base extends attachments_base
 {
-	var $num_items = 'feed_limit_post';
-	var $attachments = array();
+	protected $num_items = 'feed_limit_post';
 
-	function set_keys()
+	/**
+	 * {@inheritdoc}
+	 */
+	public function set_keys()
 	{
 		$this->set('title',		'post_subject');
 		$this->set('title2',	'topic_title');
@@ -40,7 +42,10 @@ abstract class post_base extends \phpbb\feed\attachments_base
 		$this->set('enable_magic_url',	'enable_magic_url');
 	}
 
-	function adjust_item(&$item_row, &$row)
+	/**
+	 * {@inheritdoc}
+	 */
+	public function adjust_item(&$item_row, &$row)
 	{
 		$item_row['link'] = $this->helper->append_sid('viewtopic.' . $this->phpEx, "t={$row['topic_id']}&amp;p={$row['post_id']}#p{$row['post_id']}");
 
diff --git a/phpBB/phpbb/feed/quote_helper.php b/phpBB/phpbb/feed/quote_helper.php
new file mode 100644
index 0000000000..843d075028
--- /dev/null
+++ b/phpBB/phpbb/feed/quote_helper.php
@@ -0,0 +1,36 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\feed;
+
+/**
+ * Modified quote_helper for feeds (basically just removing all attributes)
+ */
+class quote_helper extends \phpbb\textformatter\s9e\quote_helper
+{
+	/**
+	 * {@inheritdoc}
+	 */
+	public function inject_metadata($xml)
+	{
+		// In feeds we don't want any attributes, so delete all of them
+		return \s9e\TextFormatter\Utils::replaceAttributes(
+			$xml,
+			'QUOTE',
+			function ()
+			{
+				return [];
+			}
+		);
+	}
+}
diff --git a/phpBB/phpbb/feed/topic.php b/phpBB/phpbb/feed/topic.php
index 295bf3f795..2504e411b1 100644
--- a/phpBB/phpbb/feed/topic.php
+++ b/phpBB/phpbb/feed/topic.php
@@ -1,35 +1,40 @@
 <?php
 /**
-*
-* This file is part of the phpBB Forum Software package.
-*
-* @copyright (c) phpBB Limited <https://www.phpbb.com>
-* @license GNU General Public License, version 2 (GPL-2.0)
-*
-* For full copyright and license information, please see
-* the docs/CREDITS.txt file.
-*
-*/
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
 
 namespace phpbb\feed;
 
+use phpbb\feed\exception\no_feed_exception;
+use phpbb\feed\exception\no_topic_exception;
+use phpbb\feed\exception\unauthorized_forum_exception;
+use phpbb\feed\exception\unauthorized_topic_exception;
+
 /**
-* Topic feed for a specific topic
-*
-* This will give you the last {$this->num_items} posts made within this topic.
-*/
-class topic extends \phpbb\feed\post_base
+ * Topic feed for a specific topic
+ *
+ * This will give you the last {$this->num_items} posts made within this topic.
+ */
+class topic extends post_base
 {
-	var $topic_id		= 0;
-	var $forum_id		= 0;
-	var $topic_data		= array();
+	protected $topic_id		= 0;
+	protected $forum_id		= 0;
+	protected $topic_data	= array();
 
 	/**
-	* Set the Topic ID
-	*
-	* @param int	$topic_id			Topic ID
-	* @return	\phpbb\feed\topic
-	*/
+	 * Set the Topic ID
+	 *
+	 * @param int	$topic_id			Topic ID
+	 * @return	\phpbb\feed\topic
+	 */
 	public function set_topic_id($topic_id)
 	{
 		$this->topic_id = (int) $topic_id;
@@ -37,7 +42,10 @@ class topic extends \phpbb\feed\post_base
 		return $this;
 	}
 
-	function open()
+	/**
+	 * {@inheritdoc}
+	 */
+	public function open()
 	{
 		$sql = 'SELECT f.forum_options, f.forum_password, t.topic_id, t.forum_id, t.topic_visibility, t.topic_title, t.topic_time, t.topic_views, t.topic_posts_approved, t.topic_type
 			FROM ' . TOPICS_TABLE . ' t
@@ -50,7 +58,7 @@ class topic extends \phpbb\feed\post_base
 
 		if (empty($this->topic_data))
 		{
-			trigger_error('NO_TOPIC');
+			throw new no_topic_exception($this->topic_id);
 		}
 
 		$this->forum_id = (int) $this->topic_data['forum_id'];
@@ -58,19 +66,35 @@ class topic extends \phpbb\feed\post_base
 		// Make sure topic is either approved or user authed
 		if ($this->topic_data['topic_visibility'] != ITEM_APPROVED && !$this->auth->acl_get('m_approve', $this->forum_id))
 		{
-			trigger_error('SORRY_AUTH_READ');
+			if ($this->user->data['user_id'] != ANONYMOUS)
+			{
+				send_status_line(403, 'Forbidden');
+			}
+			else
+			{
+				send_status_line(401, 'Unauthorized');
+			}
+			throw new unauthorized_topic_exception($this->topic_id);
 		}
 
 		// Make sure forum is not excluded from feed
 		if (phpbb_optionget(FORUM_OPTION_FEED_EXCLUDE, $this->topic_data['forum_options']))
 		{
-			trigger_error('NO_FEED');
+			throw new no_feed_exception();
 		}
 
 		// Make sure we can read this forum
 		if (!$this->auth->acl_get('f_read', $this->forum_id))
 		{
-			trigger_error('SORRY_AUTH_READ');
+			if ($this->user->data['user_id'] != ANONYMOUS)
+			{
+				send_status_line(403, 'Forbidden');
+			}
+			else
+			{
+				send_status_line(401, 'Unauthorized');
+			}
+			throw new unauthorized_forum_exception($this->forum_id);
 		}
 
 		// Make sure forum is not passworded or user is authed
@@ -80,7 +104,15 @@ class topic extends \phpbb\feed\post_base
 
 			if (isset($forum_ids_passworded[$this->forum_id]))
 			{
-				trigger_error('SORRY_AUTH_READ');
+				if ($this->user->data['user_id'] != ANONYMOUS)
+				{
+					send_status_line(403, 'Forbidden');
+				}
+				else
+				{
+					send_status_line(401, 'Unauthorized');
+				}
+				throw new unauthorized_forum_exception($this->forum_id);
 			}
 
 			unset($forum_ids_passworded);
@@ -89,13 +121,16 @@ class topic extends \phpbb\feed\post_base
 		parent::open();
 	}
 
-	function get_sql()
+	/**
+	 * {@inheritdoc}
+	 */
+	protected function get_sql()
 	{
 		parent::fetch_attachments();
 
 		$this->sql = array(
 			'SELECT'	=>	'p.post_id, p.post_time, p.post_edit_time, p.post_visibility, p.post_subject, p.post_text, p.bbcode_bitfield, p.bbcode_uid, p.enable_bbcode, p.enable_smilies, p.enable_magic_url, p.post_attachment, ' .
-							'u.username, u.user_id',
+				'u.username, u.user_id',
 			'FROM'		=> array(
 				POSTS_TABLE		=> 'p',
 				USERS_TABLE		=> 'u',
@@ -109,14 +144,20 @@ class topic extends \phpbb\feed\post_base
 		return true;
 	}
 
-	function adjust_item(&$item_row, &$row)
+	/**
+	 * {@inheritdoc}
+	 */
+	public function adjust_item(&$item_row, &$row)
 	{
 		parent::adjust_item($item_row, $row);
 
 		$item_row['forum_id'] = $this->forum_id;
 	}
 
-	function get_item()
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_item()
 	{
 		return ($row = parent::get_item()) ? array_merge($this->topic_data, $row) : $row;
 	}
diff --git a/phpBB/phpbb/feed/topic_base.php b/phpBB/phpbb/feed/topic_base.php
index f9ff368cba..0f1a9ccb70 100644
--- a/phpBB/phpbb/feed/topic_base.php
+++ b/phpBB/phpbb/feed/topic_base.php
@@ -1,26 +1,29 @@
 <?php
 /**
-*
-* This file is part of the phpBB Forum Software package.
-*
-* @copyright (c) phpBB Limited <https://www.phpbb.com>
-* @license GNU General Public License, version 2 (GPL-2.0)
-*
-* For full copyright and license information, please see
-* the docs/CREDITS.txt file.
-*
-*/
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
 
 namespace phpbb\feed;
 
 /**
-* Abstract class for topic based feeds
-*/
-abstract class topic_base extends \phpbb\feed\attachments_base
+ * Abstract class for topic based feeds
+ */
+abstract class topic_base extends attachments_base
 {
-	var $num_items = 'feed_limit_topic';
+	protected $num_items = 'feed_limit_topic';
 
-	function set_keys()
+	/**
+	 * {@inheritdoc}
+	 */
+	public function set_keys()
 	{
 		$this->set('title',		'topic_title');
 		$this->set('title2',	'forum_name');
@@ -39,7 +42,10 @@ abstract class topic_base extends \phpbb\feed\attachments_base
 		$this->set('enable_magic_url',	'enable_magic_url');
 	}
 
-	function adjust_item(&$item_row, &$row)
+	/**
+	 * {@inheritdoc}
+	 */
+	public function adjust_item(&$item_row, &$row)
 	{
 		$item_row['link'] = $this->helper->append_sid('viewtopic.' . $this->phpEx, 't=' . $row['topic_id'] . '&amp;p=' . $row['post_id'] . '#p' . $row['post_id']);
 
diff --git a/phpBB/phpbb/feed/topics.php b/phpBB/phpbb/feed/topics.php
index e6416bc064..183c29d11c 100644
--- a/phpBB/phpbb/feed/topics.php
+++ b/phpBB/phpbb/feed/topics.php
@@ -1,27 +1,30 @@
 <?php
 /**
-*
-* This file is part of the phpBB Forum Software package.
-*
-* @copyright (c) phpBB Limited <https://www.phpbb.com>
-* @license GNU General Public License, version 2 (GPL-2.0)
-*
-* For full copyright and license information, please see
-* the docs/CREDITS.txt file.
-*
-*/
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
 
 namespace phpbb\feed;
 
 /**
-* New Topics feed
-*
-* This will give you the last {$this->num_items} created topics
-* including the first post.
-*/
-class topics extends \phpbb\feed\topic_base
+ * New Topics feed
+ *
+ * This will give you the last {$this->num_items} created topics
+ * including the first post.
+ */
+class topics extends topic_base
 {
-	function get_sql()
+	/**
+	 * {@inheritdoc}
+	 */
+	protected function get_sql()
 	{
 		$forum_ids_read = $this->get_readable_forums();
 		if (empty($forum_ids_read))
@@ -79,7 +82,10 @@ class topics extends \phpbb\feed\topic_base
 		return true;
 	}
 
-	function adjust_item(&$item_row, &$row)
+	/**
+	 * {@inheritdoc}
+	 */
+	public function adjust_item(&$item_row, &$row)
 	{
 		parent::adjust_item($item_row, $row);
 
diff --git a/phpBB/phpbb/feed/topics_active.php b/phpBB/phpbb/feed/topics_active.php
index 3b751f3233..ea9ee97b9d 100644
--- a/phpBB/phpbb/feed/topics_active.php
+++ b/phpBB/phpbb/feed/topics_active.php
@@ -1,30 +1,33 @@
 <?php
 /**
-*
-* This file is part of the phpBB Forum Software package.
-*
-* @copyright (c) phpBB Limited <https://www.phpbb.com>
-* @license GNU General Public License, version 2 (GPL-2.0)
-*
-* For full copyright and license information, please see
-* the docs/CREDITS.txt file.
-*
-*/
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
 
 namespace phpbb\feed;
 
 /**
-* Active Topics feed
-*
-* This will give you the last {$this->num_items} topics
-* with replies made withing the last {$this->sort_days} days
-* including the last post.
-*/
-class topics_active extends \phpbb\feed\topic_base
+ * Active Topics feed
+ *
+ * This will give you the last {$this->num_items} topics
+ * with replies made withing the last {$this->sort_days} days
+ * including the last post.
+ */
+class topics_active extends topic_base
 {
-	var $sort_days = 7;
+	protected $sort_days = 7;
 
-	function set_keys()
+	/**
+	 * {@inheritdoc}
+	 */
+	public function set_keys()
 	{
 		parent::set_keys();
 
@@ -32,7 +35,10 @@ class topics_active extends \phpbb\feed\topic_base
 		$this->set('creator',	'topic_last_poster_name');
 	}
 
-	function get_sql()
+	/**
+	 * {@inheritdoc}
+	 */
+	protected function get_sql()
 	{
 		$forum_ids_read = $this->get_readable_forums();
 		if (empty($forum_ids_read))
@@ -96,7 +102,12 @@ class topics_active extends \phpbb\feed\topic_base
 		return true;
 	}
 
-	function get_forum_ids()
+	/**
+	 * Returns the ids of the forums not excluded from the active list
+	 *
+	 * @return int[]
+	 */
+	private function get_forum_ids()
 	{
 		static $forum_ids;
 
@@ -108,7 +119,7 @@ class topics_active extends \phpbb\feed\topic_base
 				FROM ' . FORUMS_TABLE . '
 				WHERE forum_type = ' . FORUM_POST . '
 					AND ' . $this->db->sql_bit_and('forum_options', FORUM_OPTION_FEED_EXCLUDE, '= 0') . '
-					AND ' . $this->db->sql_bit_and('forum_flags', log(FORUM_FLAG_ACTIVE_TOPICS, 2), '<> 0');
+					AND ' . $this->db->sql_bit_and('forum_flags', round(log(FORUM_FLAG_ACTIVE_TOPICS, 2)), '<> 0');
 			$result = $this->db->sql_query($sql);
 
 			$forum_ids = array();
@@ -124,7 +135,10 @@ class topics_active extends \phpbb\feed\topic_base
 		return $forum_ids;
 	}
 
-	function adjust_item(&$item_row, &$row)
+	/**
+	 * {@inheritdoc}
+	 */
+	public function adjust_item(&$item_row, &$row)
 	{
 		parent::adjust_item($item_row, $row);
 
diff --git a/phpBB/phpbb/file_downloader.php b/phpBB/phpbb/file_downloader.php
index ab9505a14c..403ca5bc83 100644
--- a/phpBB/phpbb/file_downloader.php
+++ b/phpBB/phpbb/file_downloader.php
@@ -42,7 +42,7 @@ class file_downloader
 		$this->error_number = 0;
 		$this->error_string = '';
 
-		if ($socket = @fsockopen(($port == 443 ? 'tls://' : '') . $host, $port, $this->error_number, $this->error_string, $timeout))
+		if ($socket = @fsockopen(($port == 443 ? 'ssl://' : '') . $host, $port, $this->error_number, $this->error_string, $timeout))
 		{
 			@fputs($socket, "GET $directory/$filename HTTP/1.0\r\n");
 			@fputs($socket, "HOST: $host\r\n");
diff --git a/phpBB/phpbb/files/factory.php b/phpBB/phpbb/files/factory.php
new file mode 100644
index 0000000000..84b7cc9449
--- /dev/null
+++ b/phpBB/phpbb/files/factory.php
@@ -0,0 +1,58 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\files;
+
+class factory
+{
+	/**
+	 * @var \Symfony\Component\DependencyInjection\ContainerInterface
+	 */
+	private $container;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \Symfony\Component\DependencyInjection\ContainerInterface $container
+	 */
+	public function __construct(\Symfony\Component\DependencyInjection\ContainerInterface $container)
+	{
+		$this->container = $container;
+	}
+
+	/**
+	 * Get files service
+	 *
+	 * @param string $name Service name
+	 *
+	 * @return object|bool Requested service or false if service could not be
+	 *				found by the container
+	 */
+	public function get($name)
+	{
+		$service = false;
+
+		$name = (strpos($name, '.') === false) ? 'files.' . $name : $name;
+
+		try
+		{
+			$service = $this->container->get($name);
+		}
+		catch (\Exception $e)
+		{
+			// do nothing
+		}
+
+		return $service;
+	}
+}
diff --git a/phpBB/phpbb/files/filespec.php b/phpBB/phpbb/files/filespec.php
new file mode 100644
index 0000000000..6847bca4cb
--- /dev/null
+++ b/phpBB/phpbb/files/filespec.php
@@ -0,0 +1,584 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\files;
+
+use phpbb\language\language;
+
+/**
+ * Responsible for holding all file relevant information, as well as doing file-specific operations.
+ * The {@link fileupload fileupload class} can be used to upload several files, each of them being this object to operate further on.
+ */
+class filespec
+{
+	/** @var string File name */
+	protected $filename = '';
+
+	/** @var string Real name of file */
+	protected $realname = '';
+
+	/** @var string Upload name of file */
+	protected $uploadname = '';
+
+	/** @var string Mimetype of file */
+	protected $mimetype = '';
+
+	/** @var string File extension */
+	protected $extension = '';
+
+	/** @var int File size */
+	protected $filesize = 0;
+
+	/** @var int Width of file */
+	protected $width = 0;
+
+	/** @var int Height of file */
+	protected $height = 0;
+
+	/** @var array Image info including type and size */
+	protected $image_info = array();
+
+	/** @var string Destination file name */
+	protected $destination_file = '';
+
+	/** @var string Destination file path */
+	protected $destination_path = '';
+
+	/** @var bool Whether file was moved */
+	protected $file_moved = false;
+
+	/** @var bool Whether file is local */
+	protected $local = false;
+
+	/** @var bool Class initialization flag */
+	protected $class_initialized = false;
+
+	/** @var array Error array */
+	public $error = array();
+
+	/** @var upload Instance of upload class  */
+	public $upload;
+
+	/** @var \phpbb\filesystem\filesystem_interface */
+	protected $filesystem;
+
+	/** @var \bantu\IniGetWrapper\IniGetWrapper ini_get() wrapper class */
+	protected $php_ini;
+
+	/** @var \FastImageSize\FastImageSize */
+	protected $imagesize;
+
+	/** @var language Language class */
+	protected $language;
+
+	/** @var string phpBB root path */
+	protected $phpbb_root_path;
+
+	/** @var \phpbb\plupload\plupload The plupload object */
+	protected $plupload;
+
+	/** @var \phpbb\mimetype\guesser phpBB Mimetype guesser */
+	protected $mimetype_guesser;
+
+	/**
+	 * File upload class
+	 *
+	 * @param \phpbb\filesystem\filesystem_interface	$phpbb_filesystem Filesystem
+	 * @param language					$language Language
+	 * @param \bantu\IniGetWrapper\IniGetWrapper			$php_ini ini_get() wrapper
+	 * @param \FastImageSize\FastImageSize $imagesize Imagesize class
+	 * @param string					$phpbb_root_path phpBB root path
+	 * @param \phpbb\mimetype\guesser	$mimetype_guesser Mime type guesser
+	 * @param \phpbb\plupload\plupload	$plupload Plupload
+	 */
+	public function __construct(\phpbb\filesystem\filesystem_interface $phpbb_filesystem, language $language, \bantu\IniGetWrapper\IniGetWrapper $php_ini, \FastImageSize\FastImageSize $imagesize, $phpbb_root_path, \phpbb\mimetype\guesser $mimetype_guesser = null, \phpbb\plupload\plupload $plupload = null)
+	{
+		$this->filesystem = $phpbb_filesystem;
+		$this->language = $language;
+		$this->php_ini = $php_ini;
+		$this->imagesize = $imagesize;
+		$this->phpbb_root_path = $phpbb_root_path;
+		$this->plupload = $plupload;
+		$this->mimetype_guesser = $mimetype_guesser;
+	}
+
+	/**
+	 * Set upload ary
+	 *
+	 * @param array $upload_ary Upload ary
+	 *
+	 * @return filespec This instance of the filespec class
+	 */
+	public function set_upload_ary($upload_ary)
+	{
+		if (!isset($upload_ary) || !count($upload_ary))
+		{
+			return $this;
+		}
+
+		$this->class_initialized = true;
+		$this->filename = $upload_ary['tmp_name'];
+		$this->filesize = $upload_ary['size'];
+		$name = $upload_ary['name'];
+		$name = trim(utf8_basename($name));
+		$this->realname = $this->uploadname = $name;
+		$this->mimetype = $upload_ary['type'];
+
+		// Opera adds the name to the mime type
+		$this->mimetype	= (strpos($this->mimetype, '; name') !== false) ? str_replace(strstr($this->mimetype, '; name'), '', $this->mimetype) : $this->mimetype;
+
+		if (!$this->mimetype)
+		{
+			$this->mimetype = 'application/octet-stream';
+		}
+
+		$this->extension = strtolower(self::get_extension($this->realname));
+
+		// Try to get real filesize from temporary folder (not always working) ;)
+		$this->filesize = ($this->get_filesize($this->filename)) ?: $this->filesize;
+
+		$this->width = $this->height = 0;
+		$this->file_moved = false;
+
+		$this->local = (isset($upload_ary['local_mode'])) ? true : false;
+
+		return $this;
+	}
+
+	/**
+	 * Set the upload namespace
+	 *
+	 * @param upload $namespace Instance of upload class
+	 *
+	 * @return filespec This instance of the filespec class
+	 */
+	public function set_upload_namespace($namespace)
+	{
+		$this->upload = $namespace;
+
+		return $this;
+	}
+
+	/**
+	 * Check if class members were not properly initialised yet
+	 *
+	 * @return bool True if there was an init error, false if not
+	 */
+	public function init_error()
+	{
+		return !$this->class_initialized;
+	}
+
+	/**
+	 * Set error in error array
+	 *
+	 * @param mixed $error Content for error array
+	 *
+	 * @return \phpbb\files\filespec This instance of the filespec class
+	 */
+	public function set_error($error)
+	{
+		$this->error[] = $error;
+
+		return $this;
+	}
+
+	/**
+	 * Cleans destination filename
+	 *
+	 * @param string $mode Either real, unique, or unique_ext. Real creates a
+	 *				realname, filtering some characters, lowering every
+	 *				character. Unique creates a unique filename.
+	 * @param string $prefix Prefix applied to filename
+	 * @param string $user_id The user_id is only needed for when cleaning a user's avatar
+	 */
+	public function clean_filename($mode = 'unique', $prefix = '', $user_id = '')
+	{
+		if ($this->init_error())
+		{
+			return;
+		}
+
+		switch ($mode)
+		{
+			case 'real':
+				// Remove every extension from filename (to not let the mime bug being exposed)
+				if (strpos($this->realname, '.') !== false)
+				{
+					$this->realname = substr($this->realname, 0, strpos($this->realname, '.'));
+				}
+
+				// Replace any chars which may cause us problems with _
+				$bad_chars = array("'", "\\", ' ', '/', ':', '*', '?', '"', '<', '>', '|');
+
+				$this->realname = rawurlencode(str_replace($bad_chars, '_', strtolower($this->realname)));
+				$this->realname = preg_replace("/%(\w{2})/", '_', $this->realname);
+
+				$this->realname = $prefix . $this->realname . '.' . $this->extension;
+			break;
+
+			case 'unique':
+				$this->realname = $prefix . md5(unique_id());
+			break;
+
+			case 'avatar':
+				$this->extension = strtolower($this->extension);
+				$this->realname = $prefix . $user_id . '.' . $this->extension;
+
+			break;
+
+			case 'unique_ext':
+			default:
+				$this->realname = $prefix . md5(unique_id()) . '.' . $this->extension;
+		}
+	}
+
+	/**
+	 * Get property from file object
+	 *
+	 * @param string $property Name of property
+	 *
+	 * @return mixed Content of property
+	 */
+	public function get($property)
+	{
+		if ($this->init_error() || !isset($this->$property))
+		{
+			return false;
+		}
+
+		return $this->$property;
+	}
+
+	/**
+	 * Check if file is an image (mime type)
+	 *
+	 * @return bool true if it is an image, false if not
+	 */
+	public function is_image()
+	{
+		return (strpos($this->mimetype, 'image/') === 0);
+	}
+
+	/**
+	 * Check if the file got correctly uploaded
+	 *
+	 * @return bool true if it is a valid upload, false if not
+	 */
+	public function is_uploaded()
+	{
+		$is_plupload = $this->plupload && $this->plupload->is_active();
+
+		if (!$this->local && !$is_plupload && !is_uploaded_file($this->filename))
+		{
+			return false;
+		}
+
+		if (($this->local || $is_plupload) && !file_exists($this->filename))
+		{
+			return false;
+		}
+
+		return true;
+	}
+
+	/**
+	 * Remove file
+	 */
+	public function remove()
+	{
+		if ($this->file_moved)
+		{
+			@unlink($this->destination_file);
+		}
+	}
+
+	/**
+	 * Get file extension
+	 *
+	 * @param string $filename Filename that needs to be checked
+	 *
+	 * @return string Extension of the supplied filename
+	 */
+	static public function get_extension($filename)
+	{
+		$filename = utf8_basename($filename);
+
+		if (strpos($filename, '.') === false)
+		{
+			return '';
+		}
+
+		$filename = explode('.', $filename);
+		return array_pop($filename);
+	}
+
+	/**
+	 * Get mime type
+	 *
+	 * @param string $filename Filename that needs to be checked
+	 * @return string Mime type of supplied filename
+	 */
+	public function get_mimetype($filename)
+	{
+		if ($this->mimetype_guesser !== null)
+		{
+			$mimetype = $this->mimetype_guesser->guess($filename, $this->uploadname);
+
+			if ($mimetype !== 'application/octet-stream')
+			{
+				$this->mimetype = $mimetype;
+			}
+		}
+
+		return $this->mimetype;
+	}
+
+	/**
+	 * Get file size
+	 *
+	 * @param string $filename File name of file to check
+	 *
+	 * @return int File size
+	 */
+	public function get_filesize($filename)
+	{
+		return @filesize($filename);
+	}
+
+
+	/**
+	 * Check the first 256 bytes for forbidden content
+	 *
+	 * @param array $disallowed_content Array containg disallowed content
+	 *
+	 * @return bool False if disallowed content found, true if not
+	 */
+	public function check_content($disallowed_content)
+	{
+		if (empty($disallowed_content))
+		{
+			return true;
+		}
+
+		$fp = @fopen($this->filename, 'rb');
+
+		if ($fp !== false)
+		{
+			$ie_mime_relevant = fread($fp, 256);
+			fclose($fp);
+			foreach ($disallowed_content as $forbidden)
+			{
+				if (stripos($ie_mime_relevant, '<' . $forbidden) !== false)
+				{
+					return false;
+				}
+			}
+		}
+		return true;
+	}
+
+	/**
+	 * Move file to destination folder
+	 * The phpbb_root_path variable will be applied to the destination path
+	 *
+	 * @param string $destination Destination path, for example $config['avatar_path']
+	 * @param bool $overwrite If set to true, an already existing file will be overwritten
+	 * @param bool $skip_image_check If set to true, the check for the file to be a valid image is skipped
+	 * @param string|bool $chmod Permission mask for chmodding the file after a successful move.
+	 *				The mode entered here reflects the mode defined by {@link phpbb_chmod()}
+	 *
+	 * @return bool True if file was moved, false if not
+	 * @access public
+	 */
+	public function move_file($destination, $overwrite = false, $skip_image_check = false, $chmod = false)
+	{
+		if (count($this->error))
+		{
+			return false;
+		}
+
+		$chmod = ($chmod === false) ? CHMOD_READ | CHMOD_WRITE : $chmod;
+
+		// We need to trust the admin in specifying valid upload directories and an attacker not being able to overwrite it...
+		$this->destination_path = $this->phpbb_root_path . $destination;
+
+		// Check if the destination path exist...
+		if (!file_exists($this->destination_path))
+		{
+			@unlink($this->filename);
+			return false;
+		}
+
+		$upload_mode = ($this->php_ini->getBool('open_basedir') || $this->php_ini->getBool('safe_mode')) ? 'move' : 'copy';
+		$upload_mode = ($this->local) ? 'local' : $upload_mode;
+		$this->destination_file = $this->destination_path . '/' . utf8_basename($this->realname);
+
+		// Check if the file already exist, else there is something wrong...
+		if (file_exists($this->destination_file) && !$overwrite)
+		{
+			@unlink($this->filename);
+			$this->error[] = $this->language->lang($this->upload->error_prefix . 'GENERAL_UPLOAD_ERROR', $this->destination_file);
+			$this->file_moved = false;
+			return false;
+		}
+		else
+		{
+			if (file_exists($this->destination_file))
+			{
+				@unlink($this->destination_file);
+			}
+
+			switch ($upload_mode)
+			{
+				case 'copy':
+
+					if (!@copy($this->filename, $this->destination_file))
+					{
+						if (!@move_uploaded_file($this->filename, $this->destination_file))
+						{
+							$this->error[] = $this->language->lang($this->upload->error_prefix . 'GENERAL_UPLOAD_ERROR', $this->destination_file);
+						}
+					}
+
+				break;
+
+				case 'move':
+
+					if (!@move_uploaded_file($this->filename, $this->destination_file))
+					{
+						if (!@copy($this->filename, $this->destination_file))
+						{
+							$this->error[] = $this->language->lang($this->upload->error_prefix . 'GENERAL_UPLOAD_ERROR', $this->destination_file);
+						}
+					}
+
+				break;
+
+				case 'local':
+
+					if (!@copy($this->filename, $this->destination_file))
+					{
+						$this->error[] = $this->language->lang($this->upload->error_prefix . 'GENERAL_UPLOAD_ERROR', $this->destination_file);
+					}
+
+				break;
+			}
+
+			// Remove temporary filename
+			@unlink($this->filename);
+
+			if (count($this->error))
+			{
+				return false;
+			}
+
+			try
+			{
+				$this->filesystem->phpbb_chmod($this->destination_file, $chmod);
+			}
+			catch (\phpbb\filesystem\exception\filesystem_exception $e)
+			{
+				// Do nothing
+			}
+		}
+
+		// Try to get real filesize from destination folder
+		$this->filesize = ($this->get_filesize($this->destination_file)) ?: $this->filesize;
+
+		// Get mimetype of supplied file
+		$this->mimetype = $this->get_mimetype($this->destination_file);
+
+		if ($this->is_image() && !$skip_image_check)
+		{
+			$this->width = $this->height = 0;
+
+			$this->image_info = $this->imagesize->getImageSize($this->destination_file, $this->mimetype);
+
+			if ($this->image_info !== false)
+			{
+				$this->width = $this->image_info['width'];
+				$this->height = $this->image_info['height'];
+
+				// Check image type
+				$types = upload::image_types();
+
+				if (!isset($types[$this->image_info['type']]) || !in_array($this->extension, $types[$this->image_info['type']]))
+				{
+					if (!isset($types[$this->image_info['type']]))
+					{
+						$this->error[] = $this->language->lang('IMAGE_FILETYPE_INVALID', $this->image_info['type'], $this->mimetype);
+					}
+					else
+					{
+						$this->error[] = $this->language->lang('IMAGE_FILETYPE_MISMATCH', $types[$this->image_info['type']][0], $this->extension);
+					}
+				}
+
+				// Make sure the dimensions match a valid image
+				if (empty($this->width) || empty($this->height))
+				{
+					$this->error[] = $this->language->lang('ATTACHED_IMAGE_NOT_IMAGE');
+				}
+			}
+			else
+			{
+				$this->error[] = $this->language->lang('UNABLE_GET_IMAGE_SIZE');
+			}
+		}
+
+		$this->file_moved = true;
+		$this->additional_checks();
+		unset($this->upload);
+
+		return true;
+	}
+
+	/**
+	 * Performing additional checks
+	 *
+	 * @return bool False if issue was found, true if not
+	 */
+	public function additional_checks()
+	{
+		if (!$this->file_moved)
+		{
+			return false;
+		}
+
+		// Filesize is too big or it's 0 if it was larger than the maxsize in the upload form
+		if ($this->upload->max_filesize && ($this->get('filesize') > $this->upload->max_filesize || $this->filesize == 0))
+		{
+			$max_filesize = get_formatted_filesize($this->upload->max_filesize, false);
+
+			$this->error[] = $this->language->lang($this->upload->error_prefix . 'WRONG_FILESIZE', $max_filesize['value'], $max_filesize['unit']);
+
+			return false;
+		}
+
+		if (!$this->upload->valid_dimensions($this))
+		{
+			$this->error[] = $this->language->lang($this->upload->error_prefix . 'WRONG_SIZE',
+				$this->language->lang('PIXELS', (int) $this->upload->min_width),
+				$this->language->lang('PIXELS', (int) $this->upload->min_height),
+				$this->language->lang('PIXELS', (int) $this->upload->max_width),
+				$this->language->lang('PIXELS', (int) $this->upload->max_height),
+				$this->language->lang('PIXELS', (int) $this->width),
+				$this->language->lang('PIXELS', (int) $this->height));
+
+			return false;
+		}
+
+		return true;
+	}
+}
diff --git a/phpBB/phpbb/files/types/base.php b/phpBB/phpbb/files/types/base.php
new file mode 100644
index 0000000000..3313ad040b
--- /dev/null
+++ b/phpBB/phpbb/files/types/base.php
@@ -0,0 +1,65 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\files\types;
+
+abstract class base implements type_interface
+{
+	/** @var \phpbb\language\language */
+	protected $language;
+
+	/** @var \bantu\IniGetWrapper\IniGetWrapper */
+	protected $php_ini;
+
+	/** @var \phpbb\files\upload */
+	protected $upload;
+
+	/**
+	 * Check if upload exceeds maximum file size
+	 *
+	 * @param \phpbb\files\filespec $file Filespec object
+	 *
+	 * @return \phpbb\files\filespec Returns same filespec instance
+	 */
+	public function check_upload_size($file)
+	{
+		// PHP Upload filesize exceeded
+		if ($file->get('filename') == 'none')
+		{
+			$max_filesize = $this->php_ini->getString('upload_max_filesize');
+			$unit = 'MB';
+
+			if (!empty($max_filesize))
+			{
+				$unit = strtolower(substr($max_filesize, -1, 1));
+				$max_filesize = (int) $max_filesize;
+
+				$unit = ($unit == 'k') ? 'KB' : (($unit == 'g') ? 'GB' : 'MB');
+			}
+
+			$file->error[] = (empty($max_filesize)) ? $this->language->lang($this->upload->error_prefix . 'PHP_SIZE_NA') : $this->language->lang($this->upload->error_prefix . 'PHP_SIZE_OVERRUN', $max_filesize, $this->language->lang($unit));
+		}
+
+		return $file;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function set_upload(\phpbb\files\upload $upload)
+	{
+		$this->upload = $upload;
+
+		return $this;
+	}
+}
diff --git a/phpBB/phpbb/files/types/form.php b/phpBB/phpbb/files/types/form.php
new file mode 100644
index 0000000000..2c3beb6e02
--- /dev/null
+++ b/phpBB/phpbb/files/types/form.php
@@ -0,0 +1,138 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\files\types;
+
+use bantu\IniGetWrapper\IniGetWrapper;
+use phpbb\files\factory;
+use phpbb\files\filespec;
+use phpbb\language\language;
+use phpbb\plupload\plupload;
+use phpbb\request\request_interface;
+
+class form extends base
+{
+	/** @var factory Files factory */
+	protected $factory;
+
+	/** @var language */
+	protected $language;
+
+	/** @var IniGetWrapper */
+	protected $php_ini;
+
+	/** @var plupload */
+	protected $plupload;
+
+	/** @var request_interface */
+	protected $request;
+
+	/** @var \phpbb\files\upload */
+	protected $upload;
+
+	/**
+	 * Construct a form upload type
+	 *
+	 * @param factory			$factory	Files factory
+	 * @param language			$language	Language class
+	 * @param IniGetWrapper		$php_ini	ini_get() wrapper
+	 * @param plupload			$plupload	Plupload
+	 * @param request_interface	$request	Request object
+	 */
+	public function __construct(factory $factory, language $language, IniGetWrapper $php_ini, plupload $plupload, request_interface $request)
+	{
+		$this->factory = $factory;
+		$this->language = $language;
+		$this->php_ini = $php_ini;
+		$this->plupload = $plupload;
+		$this->request = $request;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function upload()
+	{
+		$args = func_get_args();
+		return $this->form_upload($args[0]);
+	}
+
+	/**
+	 * Form upload method
+	 * Upload file from users harddisk
+	 *
+	 * @param string $form_name Form name assigned to the file input field (if it is an array, the key has to be specified)
+	 *
+	 * @return filespec $file Object "filespec" is returned, all further operations can be done with this object
+	 * @access public
+	 */
+	protected function form_upload($form_name)
+	{
+		$upload = $this->request->file($form_name);
+		unset($upload['local_mode']);
+
+		$result = $this->plupload->handle_upload($form_name);
+		if (is_array($result))
+		{
+			$upload = array_merge($upload, $result);
+		}
+
+		/** @var filespec $file */
+		$file = $this->factory->get('filespec')
+			->set_upload_ary($upload)
+			->set_upload_namespace($this->upload);
+
+		if ($file->init_error())
+		{
+			$file->error[] = '';
+			return $file;
+		}
+
+		// Error array filled?
+		if (isset($upload['error']))
+		{
+			$error = $this->upload->assign_internal_error($upload['error']);
+
+			if ($error !== false)
+			{
+				$file->error[] = $error;
+				return $file;
+			}
+		}
+
+		// Check if empty file got uploaded (not catched by is_uploaded_file)
+		if (isset($upload['size']) && $upload['size'] == 0)
+		{
+			$file->error[] = $this->language->lang($this->upload->error_prefix . 'EMPTY_FILEUPLOAD');
+			return $file;
+		}
+
+		// PHP Upload file size check
+		$file = $this->check_upload_size($file);
+		if (count($file->error))
+		{
+			return $file;
+		}
+
+		// Not correctly uploaded
+		if (!$file->is_uploaded())
+		{
+			$file->error[] = $this->language->lang($this->upload->error_prefix . 'NOT_UPLOADED');
+			return $file;
+		}
+
+		$this->upload->common_checks($file);
+
+		return $file;
+	}
+}
diff --git a/phpBB/phpbb/files/types/local.php b/phpBB/phpbb/files/types/local.php
new file mode 100644
index 0000000000..4dfe4f7506
--- /dev/null
+++ b/phpBB/phpbb/files/types/local.php
@@ -0,0 +1,136 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\files\types;
+
+use bantu\IniGetWrapper\IniGetWrapper;
+use phpbb\files\factory;
+use phpbb\files\filespec;
+use phpbb\language\language;
+use phpbb\request\request_interface;
+
+class local extends base
+{
+	/** @var factory Files factory */
+	protected $factory;
+
+	/** @var language */
+	protected $language;
+
+	/** @var IniGetWrapper */
+	protected $php_ini;
+
+	/** @var request_interface */
+	protected $request;
+
+	/** @var \phpbb\files\upload */
+	protected $upload;
+
+	/**
+	 * Construct a form upload type
+	 *
+	 * @param factory $factory Files factory
+	 * @param language $language Language class
+	 * @param IniGetWrapper $php_ini ini_get() wrapper
+	 * @param request_interface $request Request object
+	 */
+	public function __construct(factory $factory, language $language, IniGetWrapper $php_ini, request_interface $request)
+	{
+		$this->factory = $factory;
+		$this->language = $language;
+		$this->php_ini = $php_ini;
+		$this->request = $request;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function upload()
+	{
+		$args = func_get_args();
+		return $this->local_upload($args[0], isset($args[1]) ? $args[1] : false);
+	}
+
+	/**
+	 * Move file from another location to phpBB
+	 *
+	 * @param string $source_file Filename of source file
+	 * @param array|bool $filedata Array with filedata or false
+	 *
+	 * @return filespec Object "filespec" is returned, all further operations can be done with this object
+	 */
+	protected function local_upload($source_file, $filedata = false)
+	{
+		$upload = $this->get_upload_ary($source_file, $filedata);
+
+		/** @var filespec $file */
+		$file = $this->factory->get('filespec')
+			->set_upload_ary($upload)
+			->set_upload_namespace($this->upload);
+
+		if ($file->init_error())
+		{
+			$file->error[] = '';
+			return $file;
+		}
+
+		// PHP Upload file size check
+		$file = $this->check_upload_size($file);
+		if (count($file->error))
+		{
+			return $file;
+		}
+
+		// Not correctly uploaded
+		if (!$file->is_uploaded())
+		{
+			$file->error[] = $this->language->lang($this->upload->error_prefix . 'NOT_UPLOADED');
+			return $file;
+		}
+
+		$this->upload->common_checks($file);
+		$this->request->overwrite('local', $upload, request_interface::FILES);
+
+		return $file;
+	}
+
+	/**
+	 * Retrieve upload array
+	 *
+	 * @param string $source_file Source file name
+	 * @param array $filedata File data array
+	 *
+	 * @return array Upload array
+	 */
+	protected function get_upload_ary($source_file, $filedata)
+	{
+		$upload = array();
+
+		$upload['local_mode'] = true;
+		$upload['tmp_name'] = $source_file;
+
+		if ($filedata === false)
+		{
+			$upload['name'] = utf8_basename($source_file);
+			$upload['size'] = 0;
+		}
+		else
+		{
+			$upload['name'] = $filedata['realname'];
+			$upload['size'] = $filedata['size'];
+			$upload['type'] = $filedata['type'];
+		}
+
+		return $upload;
+	}
+}
diff --git a/phpBB/phpbb/files/types/remote.php b/phpBB/phpbb/files/types/remote.php
new file mode 100644
index 0000000000..1fdba0ca32
--- /dev/null
+++ b/phpBB/phpbb/files/types/remote.php
@@ -0,0 +1,207 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\files\types;
+
+use bantu\IniGetWrapper\IniGetWrapper;
+use phpbb\config\config;
+use phpbb\files\factory;
+use phpbb\files\filespec;
+use phpbb\language\language;
+use phpbb\request\request_interface;
+
+class remote extends base
+{
+	/** @var config phpBB config */
+	protected $config;
+
+	/** @var factory Files factory */
+	protected $factory;
+
+	/** @var language */
+	protected $language;
+
+	/** @var IniGetWrapper */
+	protected $php_ini;
+
+	/** @var request_interface */
+	protected $request;
+
+	/** @var \phpbb\files\upload */
+	protected $upload;
+
+	/** @var string phpBB root path */
+	protected $phpbb_root_path;
+
+	/**
+	 * Construct a form upload type
+	 *
+	 * @param config $config phpBB config
+	 * @param factory $factory Files factory
+	 * @param language $language Language class
+	 * @param IniGetWrapper $php_ini ini_get() wrapper
+	 * @param request_interface $request Request object
+	 * @param string $phpbb_root_path phpBB root path
+	 */
+	public function __construct(config $config, factory $factory, language $language, IniGetWrapper $php_ini, request_interface $request, $phpbb_root_path)
+	{
+		$this->config = $config;
+		$this->factory = $factory;
+		$this->language = $language;
+		$this->php_ini = $php_ini;
+		$this->request = $request;
+		$this->phpbb_root_path = $phpbb_root_path;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function upload()
+	{
+		$args = func_get_args();
+		return $this->remote_upload($args[0]);
+	}
+
+	/**
+	 * Remote upload method
+	 * Uploads file from given url
+	 *
+	 * @param string $upload_url URL pointing to file to upload, for example http://www.foobar.com/example.gif
+	 * @return filespec $file Object "filespec" is returned, all further operations can be done with this object
+	 * @access public
+	 */
+	protected function remote_upload($upload_url)
+	{
+		$upload_ary = array();
+		$upload_ary['local_mode'] = true;
+
+		if (!preg_match('#^(https?://).*?\.(' . implode('|', $this->upload->allowed_extensions) . ')$#i', $upload_url, $match))
+		{
+			return $this->factory->get('filespec')->set_error($this->language->lang($this->upload->error_prefix . 'URL_INVALID'));
+		}
+
+		$url = parse_url($upload_url);
+
+		$upload_ary['type'] = 'application/octet-stream';
+
+		$url['path'] = explode('.', $url['path']);
+		$ext = array_pop($url['path']);
+
+		$url['path'] = implode('', $url['path']);
+		$upload_ary['name'] = utf8_basename($url['path']) . (($ext) ? '.' . $ext : '');
+
+		$remote_max_filesize = $this->get_max_file_size();
+
+		$guzzle_options = [
+			'timeout'			=> $this->upload->upload_timeout,
+			'connect_timeout'	=> $this->upload->upload_timeout,
+			'verify'			=> !empty($this->config['remote_upload_verify']) ? (bool) $this->config['remote_upload_verify'] : false,
+		];
+		$client = new \GuzzleHttp\Client($guzzle_options);
+
+		try
+		{
+			$response = $client->get($upload_url, $guzzle_options);
+		}
+		catch (\GuzzleHttp\Exception\ClientException $clientException)
+		{
+			return $this->factory->get('filespec')->set_error($this->upload->error_prefix . 'URL_NOT_FOUND');
+		}
+		catch (\GuzzleHttp\Exception\RequestException $requestException)
+		{
+			if (strpos($requestException->getMessage(), 'cURL error 28') !== false || preg_match('/408|504/', $requestException->getCode()))
+			{
+				return $this->factory->get('filespec')->set_error($this->upload->error_prefix . 'REMOTE_UPLOAD_TIMEOUT');
+			}
+			else
+			{
+				return $this->factory->get('filespec')->set_error($this->language->lang($this->upload->error_prefix . 'NOT_UPLOADED'));
+			}
+		}
+		catch (\Exception $e)
+		{
+			return $this->factory->get('filespec')->set_error($this->language->lang($this->upload->error_prefix . 'NOT_UPLOADED'));
+		}
+
+		$content_length = $response->getBody()->getSize();
+		if ($remote_max_filesize && $content_length > $remote_max_filesize)
+		{
+			$max_filesize = get_formatted_filesize($remote_max_filesize, false);
+
+			return $this->factory->get('filespec')->set_error($this->language->lang($this->upload->error_prefix . 'WRONG_FILESIZE', $max_filesize['value'], $max_filesize['unit']));
+		}
+
+		if ($content_length == 0)
+		{
+			return $this->factory->get('filespec')->set_error($this->upload->error_prefix . 'EMPTY_REMOTE_DATA');
+		}
+
+		$data = $response->getBody();
+
+		$filename = tempnam(sys_get_temp_dir(), unique_id() . '-');
+
+		if (!($fp = @fopen($filename, 'wb')))
+		{
+			return $this->factory->get('filespec')->set_error($this->upload->error_prefix . 'NOT_UPLOADED');
+		}
+
+		$upload_ary['size'] = fwrite($fp, $data);
+		fclose($fp);
+		unset($data);
+
+		$upload_ary['tmp_name'] = $filename;
+
+		/** @var filespec $file */
+		$file = $this->factory->get('filespec')
+			->set_upload_ary($upload_ary)
+			->set_upload_namespace($this->upload);
+		$this->upload->common_checks($file);
+
+		return $file;
+	}
+
+	/**
+	 * Get maximum file size for remote uploads
+	 *
+	 * @return int Maximum file size
+	 */
+	protected function get_max_file_size()
+	{
+		$max_file_size = $this->upload->max_filesize;
+		if (!$max_file_size)
+		{
+			$max_file_size = $this->php_ini->getString('upload_max_filesize');
+
+			if (!empty($max_file_size))
+			{
+				$unit = strtolower(substr($max_file_size, -1, 1));
+				$max_file_size = (int) $max_file_size;
+
+				switch ($unit)
+				{
+					case 'g':
+						$max_file_size *= 1024;
+					// no break
+					case 'm':
+						$max_file_size *= 1024;
+					// no break
+					case 'k':
+						$max_file_size *= 1024;
+					// no break
+				}
+			}
+		}
+
+		return $max_file_size;
+	}
+}
diff --git a/phpBB/phpbb/files/types/type_interface.php b/phpBB/phpbb/files/types/type_interface.php
new file mode 100644
index 0000000000..e07078349a
--- /dev/null
+++ b/phpBB/phpbb/files/types/type_interface.php
@@ -0,0 +1,38 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\files\types;
+
+use phpbb\files\upload;
+
+interface type_interface
+{
+	/**
+	 * Handle upload for upload types. Arguments passed to this method will be
+	 * handled by the upload type classes themselves.
+	 *
+	 * @return \phpbb\files\filespec|bool Filespec instance if upload is
+	 *                                    successful or false if not
+	 */
+	public function upload();
+
+	/**
+	 * Set upload instance
+	 * Needs to be executed before every upload.
+	 *
+	 * @param upload $upload Upload instance
+	 *
+	 * @return type_interface Returns itself
+	 */
+	public function set_upload(upload $upload);
+}
diff --git a/phpBB/phpbb/files/upload.php b/phpBB/phpbb/files/upload.php
new file mode 100644
index 0000000000..50e15c9844
--- /dev/null
+++ b/phpBB/phpbb/files/upload.php
@@ -0,0 +1,390 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\files;
+
+use phpbb\filesystem\filesystem_interface;
+use phpbb\language\language;
+use phpbb\request\request_interface;
+
+/**
+ * File upload class
+ * Init class (all parameters optional and able to be set/overwritten separately) - scope is global and valid for all uploads
+ */
+class upload
+{
+	/** @var array Allowed file extensions */
+	public $allowed_extensions = array();
+
+	/** @var array Disallowed content */
+	protected $disallowed_content = array('body', 'head', 'html', 'img', 'plaintext', 'a href', 'pre', 'script', 'table', 'title');
+
+	/** @var int Maximum filesize */
+	public $max_filesize = 0;
+
+	/** @var int Minimum width of images */
+	public $min_width = 0;
+
+	/** @var int Minimum height of images */
+	public $min_height = 0;
+
+	/** @var int Maximum width of images */
+	public $max_width = 0;
+
+	/** @var int Maximum height of images */
+	public $max_height = 0;
+
+	/** @var string Prefix for language variables of errors */
+	public $error_prefix = '';
+
+	/** @var int Timeout for remote upload */
+	public $upload_timeout = 6;
+
+	/** @var filesystem_interface */
+	protected $filesystem;
+
+	/** @var \phpbb\files\factory Files factory */
+	protected $factory;
+
+	/** @var \bantu\IniGetWrapper\IniGetWrapper ini_get() wrapper */
+	protected $php_ini;
+
+	/** @var \phpbb\language\language Language class */
+	protected $language;
+
+	/** @var request_interface Request class */
+	protected $request;
+
+	/**
+	 * Init file upload class.
+	 *
+	 * @param filesystem_interface $filesystem
+	 * @param factory $factory Files factory
+	 * @param language $language Language class
+	 * @param \bantu\IniGetWrapper\IniGetWrapper $php_ini ini_get() wrapper
+	 * @param request_interface $request Request class
+	 */
+	public function __construct(filesystem_interface $filesystem, factory $factory, language $language, \bantu\IniGetWrapper\IniGetWrapper $php_ini, request_interface $request)
+	{
+		$this->filesystem = $filesystem;
+		$this->factory = $factory;
+		$this->language = $language;
+		$this->php_ini = $php_ini;
+		$this->request = $request;
+	}
+
+	/**
+	 * Reset vars
+	 */
+	public function reset_vars()
+	{
+		$this->max_filesize = 0;
+		$this->min_width = $this->min_height = $this->max_width = $this->max_height = 0;
+		$this->error_prefix = '';
+		$this->allowed_extensions = array();
+		$this->disallowed_content = array();
+	}
+
+	/**
+	 * Set allowed extensions
+	 *
+	 * @param array $allowed_extensions Allowed file extensions
+	 *
+	 * @return \phpbb\files\upload This instance of upload
+	 */
+	public function set_allowed_extensions($allowed_extensions)
+	{
+		if ($allowed_extensions !== false && is_array($allowed_extensions))
+		{
+			$this->allowed_extensions = $allowed_extensions;
+		}
+
+		return $this;
+	}
+
+	/**
+	 * Set allowed dimensions
+	 *
+	 * @param int $min_width Minimum image width
+	 * @param int $min_height Minimum image height
+	 * @param int $max_width Maximum image width
+	 * @param int $max_height Maximum image height
+	 *
+	 * @return \phpbb\files\upload This instance of upload
+	 */
+	public function set_allowed_dimensions($min_width, $min_height, $max_width, $max_height)
+	{
+		$this->min_width = (int) $min_width;
+		$this->min_height = (int) $min_height;
+		$this->max_width = (int) $max_width;
+		$this->max_height = (int) $max_height;
+
+		return $this;
+	}
+
+	/**
+	 * Set maximum allowed file size
+	 *
+	 * @param int $max_filesize Maximum file size
+	 *
+	 * @return \phpbb\files\upload This instance of upload
+	 */
+	public function set_max_filesize($max_filesize)
+	{
+		if ($max_filesize !== false && (int) $max_filesize)
+		{
+			$this->max_filesize = (int) $max_filesize;
+		}
+
+		return $this;
+	}
+
+	/**
+	 * Set disallowed strings
+	 *
+	 * @param array $disallowed_content Disallowed content
+	 *
+	 * @return \phpbb\files\upload This instance of upload
+	 */
+	public function set_disallowed_content($disallowed_content)
+	{
+		if ($disallowed_content !== false && is_array($disallowed_content))
+		{
+			$this->disallowed_content = array_diff($disallowed_content, array(''));
+		}
+
+		return $this;
+	}
+
+	/**
+	 * Set error prefix
+	 *
+	 * @param string $error_prefix Prefix for language variables of errors
+	 *
+	 * @return \phpbb\files\upload This instance of upload
+	 */
+	public function set_error_prefix($error_prefix)
+	{
+		$this->error_prefix = $error_prefix;
+
+		return $this;
+	}
+
+	/**
+	 * Handle upload based on type
+	 *
+	 * @param string $type Upload type
+	 *
+	 * @return \phpbb\files\filespec|bool A filespec instance if upload was
+	 *		successful, false if there were issues or the type is not supported
+	 */
+	public function handle_upload($type)
+	{
+		$args = func_get_args();
+		array_shift($args);
+		$type_class = $this->factory->get($type)
+			->set_upload($this);
+
+		return (is_object($type_class)) ? call_user_func_array(array($type_class, 'upload'), $args) : false;
+	}
+
+	/**
+	 * Assign internal error
+	 *
+	 * @param string $errorcode Error code to assign
+	 *
+	 * @return string Error string
+	 * @access public
+	 */
+	public function assign_internal_error($errorcode)
+	{
+		switch ($errorcode)
+		{
+			case UPLOAD_ERR_INI_SIZE:
+				$max_filesize = $this->php_ini->getString('upload_max_filesize');
+				$unit = 'MB';
+
+				if (!empty($max_filesize))
+				{
+					$unit = strtolower(substr($max_filesize, -1, 1));
+					$max_filesize = (int) $max_filesize;
+
+					$unit = ($unit == 'k') ? 'KB' : (($unit == 'g') ? 'GB' : 'MB');
+				}
+
+				$error = (empty($max_filesize)) ? $this->language->lang($this->error_prefix . 'PHP_SIZE_NA') : $this->language->lang($this->error_prefix . 'PHP_SIZE_OVERRUN', $max_filesize, $this->language->lang($unit));
+			break;
+
+			case UPLOAD_ERR_FORM_SIZE:
+				$max_filesize = get_formatted_filesize($this->max_filesize, false);
+
+				$error = $this->language->lang($this->error_prefix . 'WRONG_FILESIZE', $max_filesize['value'], $max_filesize['unit']);
+			break;
+
+			case UPLOAD_ERR_PARTIAL:
+				$error = $this->language->lang($this->error_prefix . 'PARTIAL_UPLOAD');
+			break;
+
+			case UPLOAD_ERR_NO_FILE:
+				$error = $this->language->lang($this->error_prefix . 'NOT_UPLOADED');
+			break;
+
+			case UPLOAD_ERR_NO_TMP_DIR:
+			case UPLOAD_ERR_CANT_WRITE:
+				$error = $this->language->lang($this->error_prefix . 'NO_TEMP_DIR');
+			break;
+
+			case UPLOAD_ERR_EXTENSION:
+				$error = $this->language->lang($this->error_prefix . 'PHP_UPLOAD_STOPPED');
+			break;
+
+			default:
+				$error = false;
+			break;
+		}
+
+		return $error;
+	}
+
+	/**
+	 * Perform common file checks
+	 *
+	 * @param filespec $file Instance of filespec class
+	 */
+	public function common_checks($file)
+	{
+		// Filesize is too big or it's 0 if it was larger than the maxsize in the upload form
+		if ($this->max_filesize && ($file->get('filesize') > $this->max_filesize || $file->get('filesize') == 0))
+		{
+			$max_filesize = get_formatted_filesize($this->max_filesize, false);
+
+			$file->error[] = $this->language->lang($this->error_prefix . 'WRONG_FILESIZE', $max_filesize['value'], $max_filesize['unit']);
+		}
+
+		// check Filename
+		if (preg_match("#[\\/:*?\"<>|]#i", $file->get('realname')))
+		{
+			$file->error[] = $this->language->lang($this->error_prefix . 'INVALID_FILENAME', $file->get('realname'));
+		}
+
+		// Invalid Extension
+		if (!$this->valid_extension($file))
+		{
+			$file->error[] = $this->language->lang($this->error_prefix . 'DISALLOWED_EXTENSION', $file->get('extension'));
+		}
+
+		// MIME Sniffing
+		if (!$this->valid_content($file))
+		{
+			$file->error[] = $this->language->lang($this->error_prefix . 'DISALLOWED_CONTENT');
+		}
+	}
+
+	/**
+	 * Check for allowed extension
+	 *
+	 * @param filespec $file Instance of filespec class
+	 *
+	 * @return bool True if extension is allowed, false if not
+	 */
+	public function valid_extension($file)
+	{
+		return (in_array($file->get('extension'), $this->allowed_extensions)) ? true : false;
+	}
+
+	/**
+	 * Check for allowed dimension
+	 *
+	 * @param filespec $file Instance of filespec class
+	 *
+	 * @return bool True if dimensions are valid or no constraints set, false
+	 *			if not
+	 */
+	public function valid_dimensions($file)
+	{
+		if (!$this->max_width && !$this->max_height && !$this->min_width && !$this->min_height)
+		{
+			return true;
+		}
+
+		if (($file->get('width') > $this->max_width && $this->max_width) ||
+			($file->get('height') > $this->max_height && $this->max_height) ||
+			($file->get('width') < $this->min_width && $this->min_width) ||
+			($file->get('height') < $this->min_height && $this->min_height))
+		{
+			return false;
+		}
+
+		return true;
+	}
+
+	/**
+	 * Check if form upload is valid
+	 *
+	 * @param string $form_name Name of form
+	 *
+	 * @return bool True if form upload is valid, false if not
+	 */
+	public function is_valid($form_name)
+	{
+		$upload = $this->request->file($form_name);
+
+		return (!empty($upload) && $upload['name'] !== 'none');
+	}
+
+
+	/**
+	 * Check for bad content (IE mime-sniffing)
+	 *
+	 * @param filespec $file Instance of filespec class
+	 *
+	 * @return bool True if content is valid, false if not
+	 */
+	public function valid_content($file)
+	{
+		return ($file->check_content($this->disallowed_content));
+	}
+
+	/**
+	 * Get image type/extension mapping
+	 *
+	 * @return array Array containing the image types and their extensions
+	 */
+	static public function image_types()
+	{
+		$result = array(
+			IMAGETYPE_GIF		=> array('gif'),
+			IMAGETYPE_JPEG		=> array('jpg', 'jpeg'),
+			IMAGETYPE_PNG		=> array('png'),
+			IMAGETYPE_SWF		=> array('swf'),
+			IMAGETYPE_PSD		=> array('psd'),
+			IMAGETYPE_BMP		=> array('bmp'),
+			IMAGETYPE_TIFF_II	=> array('tif', 'tiff'),
+			IMAGETYPE_TIFF_MM	=> array('tif', 'tiff'),
+			IMAGETYPE_JPC		=> array('jpg', 'jpeg'),
+			IMAGETYPE_JP2		=> array('jpg', 'jpeg'),
+			IMAGETYPE_JPX		=> array('jpg', 'jpeg'),
+			IMAGETYPE_JB2		=> array('jpg', 'jpeg'),
+			IMAGETYPE_IFF		=> array('iff'),
+			IMAGETYPE_WBMP		=> array('wbmp'),
+			IMAGETYPE_XBM		=> array('xbm'),
+		);
+
+		if (defined('IMAGETYPE_SWC'))
+		{
+			$result[IMAGETYPE_SWC] = array('swc');
+		}
+
+		return $result;
+	}
+}
diff --git a/phpBB/phpbb/filesystem.php b/phpBB/phpbb/filesystem.php
index 77517082e5..af56d78845 100644
--- a/phpBB/phpbb/filesystem.php
+++ b/phpBB/phpbb/filesystem.php
@@ -14,37 +14,8 @@
 namespace phpbb;
 
 /**
-* A class with various functions that are related to paths, files and the filesystem
-*/
-class filesystem
+ * @deprecated	3.2.0-dev	(To be removed 3.3.0) use \phpbb\filesystem\filesystem instead
+ */
+class filesystem extends \phpbb\filesystem\filesystem
 {
-	/**
-	* Eliminates useless . and .. components from specified path.
-	*
-	* @param string $path Path to clean
-	* @return string Cleaned path
-	*/
-	public function clean_path($path)
-	{
-		$exploded = explode('/', $path);
-		$filtered = array();
-		foreach ($exploded as $part)
-		{
-			if ($part === '.' && !empty($filtered))
-			{
-				continue;
-			}
-
-			if ($part === '..' && !empty($filtered) && $filtered[sizeof($filtered) - 1] !== '.' && $filtered[sizeof($filtered) - 1] !== '..')
-			{
-				array_pop($filtered);
-			}
-			else
-			{
-				$filtered[] = $part;
-			}
-		}
-		$path = implode('/', $filtered);
-		return $path;
-	}
 }
diff --git a/phpBB/phpbb/filesystem/exception/filesystem_exception.php b/phpBB/phpbb/filesystem/exception/filesystem_exception.php
new file mode 100644
index 0000000000..d68fa9adf3
--- /dev/null
+++ b/phpBB/phpbb/filesystem/exception/filesystem_exception.php
@@ -0,0 +1,42 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\filesystem\exception;
+
+class filesystem_exception extends \phpbb\exception\runtime_exception
+{
+	/**
+	 * Constructor
+	 *
+	 * @param string		$message	The Exception message to throw (must be a language variable).
+	 * @param string		$filename	The file that caused the error.
+	 * @param array			$parameters	The parameters to use with the language var.
+	 * @param \Exception	$previous	The previous runtime_exception used for the runtime_exception chaining.
+	 * @param integer		$code		The Exception code.
+	 */
+	public function __construct($message = "", $filename = '', $parameters = array(), \Exception $previous = null, $code = 0)
+	{
+		parent::__construct($message, array_merge(array('filename' => $filename), $parameters), $previous, $code);
+	}
+
+	/**
+	 * Returns the filename that triggered the error
+	 *
+	 * @return string
+	 */
+	public function get_filename()
+	{
+		$parameters = parent::get_parameters();
+		return $parameters['filename'];
+	}
+}
diff --git a/phpBB/phpbb/filesystem/filesystem.php b/phpBB/phpbb/filesystem/filesystem.php
new file mode 100644
index 0000000000..c5be284d8c
--- /dev/null
+++ b/phpBB/phpbb/filesystem/filesystem.php
@@ -0,0 +1,916 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\filesystem;
+
+use phpbb\filesystem\exception\filesystem_exception;
+
+/**
+ * A class with various functions that are related to paths, files and the filesystem
+ */
+class filesystem implements filesystem_interface
+{
+	/**
+	 * Store some information about file ownership for phpBB's chmod function
+	 *
+	 * @var array
+	 */
+	protected $chmod_info;
+
+	/**
+	 * Stores current working directory
+	 *
+	 * @var string|bool		current working directory or false if it cannot be recovered
+	 */
+	protected $working_directory;
+
+	/**
+	 * Symfony's Filesystem component
+	 *
+	 * @var \Symfony\Component\Filesystem\Filesystem
+	 */
+	protected $symfony_filesystem;
+
+	/**
+	 * Constructor
+	 */
+	public function __construct()
+	{
+		$this->chmod_info			= array();
+		$this->symfony_filesystem	= new \Symfony\Component\Filesystem\Filesystem();
+		$this->working_directory	= null;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function chgrp($files, $group, $recursive = false)
+	{
+		try
+		{
+			$this->symfony_filesystem->chgrp($files, $group, $recursive);
+		}
+		catch (\Symfony\Component\Filesystem\Exception\IOException $e)
+		{
+			// Try to recover filename
+			// By the time this is written that is at the end of the message
+			$error = trim($e->getMessage());
+			$file = substr($error, strrpos($error, ' '));
+
+			throw new filesystem_exception('CANNOT_CHANGE_FILE_GROUP', $file, array(), $e);
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function chmod($files, $perms = null, $recursive = false, $force_chmod_link = false)
+	{
+		if (is_null($perms))
+		{
+			// Default to read permission for compatibility reasons
+			$perms = self::CHMOD_READ;
+		}
+
+		// Check if we got a permission flag
+		if ($perms > self::CHMOD_ALL)
+		{
+			$file_perm = $perms;
+
+			// Extract permissions
+			//$owner = ($file_perm >> 6) & 7; // This will be ignored
+			$group = ($file_perm >> 3) & 7;
+			$other = ($file_perm >> 0) & 7;
+
+			// Does any permissions provided? if so we add execute bit for directories
+			$group = ($group !== 0) ? ($group | self::CHMOD_EXECUTE) : $group;
+			$other = ($other !== 0) ? ($other | self::CHMOD_EXECUTE) : $other;
+
+			// Compute directory permissions
+			$dir_perm = (self::CHMOD_ALL << 6) + ($group << 3) + ($other << 3);
+		}
+		else
+		{
+			// Add execute bit to owner if execute bit is among perms
+			$owner_perm	= (self::CHMOD_READ | self::CHMOD_WRITE) | ($perms & self::CHMOD_EXECUTE);
+			$file_perm	= ($owner_perm << 6) + ($perms << 3) + ($perms << 0);
+
+			// Compute directory permissions
+			$perm = ($perms !== 0) ? ($perms | self::CHMOD_EXECUTE) : $perms;
+			$dir_perm = (($owner_perm | self::CHMOD_EXECUTE) << 6) + ($perm << 3) + ($perm << 0);
+		}
+
+		// Symfony's filesystem component does not support extra execution flags on directories
+		// so we need to implement it again
+		foreach ($this->to_iterator($files) as $file)
+		{
+			if ($recursive && is_dir($file) && !is_link($file))
+			{
+				$this->chmod(new \FilesystemIterator($file), $perms, true);
+			}
+
+			// Don't chmod links as mostly those require 0777 and that cannot be changed
+			if (is_dir($file) || (is_link($file) && $force_chmod_link))
+			{
+				if (true !== @chmod($file, $dir_perm))
+				{
+					throw new filesystem_exception('CANNOT_CHANGE_FILE_PERMISSIONS', $file,  array());
+				}
+			}
+			else if (is_file($file))
+			{
+				if (true !== @chmod($file, $file_perm))
+				{
+					throw new filesystem_exception('CANNOT_CHANGE_FILE_PERMISSIONS', $file,  array());
+				}
+			}
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function chown($files, $user, $recursive = false)
+	{
+		try
+		{
+			$this->symfony_filesystem->chown($files, $user, $recursive);
+		}
+		catch (\Symfony\Component\Filesystem\Exception\IOException $e)
+		{
+			// Try to recover filename
+			// By the time this is written that is at the end of the message
+			$error = trim($e->getMessage());
+			$file = substr($error, strrpos($error, ' '));
+
+			throw new filesystem_exception('CANNOT_CHANGE_FILE_GROUP', $file, array(), $e);
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function clean_path($path)
+	{
+		$exploded = explode('/', $path);
+		$filtered = array();
+		foreach ($exploded as $part)
+		{
+			if ($part === '.' && !empty($filtered))
+			{
+				continue;
+			}
+
+			if ($part === '..' && !empty($filtered) && $filtered[count($filtered) - 1] !== '.' && $filtered[count($filtered) - 1] !== '..')
+			{
+				array_pop($filtered);
+			}
+			else
+			{
+				$filtered[] = $part;
+			}
+		}
+		$path = implode('/', $filtered);
+		return $path;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function copy($origin_file, $target_file, $override = false)
+	{
+		try
+		{
+			$this->symfony_filesystem->copy($origin_file, $target_file, $override);
+		}
+		catch (\Symfony\Component\Filesystem\Exception\IOException $e)
+		{
+			throw new filesystem_exception('CANNOT_COPY_FILES', '', array(), $e);
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function dump_file($filename, $content)
+	{
+		try
+		{
+			$this->symfony_filesystem->dumpFile($filename, $content);
+		}
+		catch (\Symfony\Component\Filesystem\Exception\IOException $e)
+		{
+			throw new filesystem_exception('CANNOT_DUMP_FILE', $filename, array(), $e);
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function exists($files)
+	{
+		return $this->symfony_filesystem->exists($files);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function is_absolute_path($path)
+	{
+		return (isset($path[0]) && $path[0] === '/' || preg_match('#^[a-z]:[/\\\]#i', $path)) ? true : false;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function is_readable($files, $recursive = false)
+	{
+		foreach ($this->to_iterator($files) as $file)
+		{
+			if ($recursive && is_dir($file) && !is_link($file))
+			{
+				if (!$this->is_readable(new \FilesystemIterator($file), true))
+				{
+					return false;
+				}
+			}
+
+			if (!is_readable($file))
+			{
+				return false;
+			}
+		}
+
+		return true;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function is_writable($files, $recursive = false)
+	{
+		if (defined('PHP_WINDOWS_VERSION_MAJOR') || !function_exists('is_writable'))
+		{
+			foreach ($this->to_iterator($files) as $file)
+			{
+				if ($recursive && is_dir($file) && !is_link($file))
+				{
+					if (!$this->is_writable(new \FilesystemIterator($file), true))
+					{
+						return false;
+					}
+				}
+
+				if (!$this->phpbb_is_writable($file))
+				{
+					return false;
+				}
+			}
+		}
+		else
+		{
+			// use built in is_writable
+			foreach ($this->to_iterator($files) as $file)
+			{
+				if ($recursive && is_dir($file) && !is_link($file))
+				{
+					if (!$this->is_writable(new \FilesystemIterator($file), true))
+					{
+						return false;
+					}
+				}
+
+				if (!is_writable($file))
+				{
+					return false;
+				}
+			}
+		}
+
+		return true;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function make_path_relative($end_path, $start_path)
+	{
+		return $this->symfony_filesystem->makePathRelative($end_path, $start_path);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function mirror($origin_dir, $target_dir, \Traversable $iterator = null, $options = array())
+	{
+		try
+		{
+			$this->symfony_filesystem->mirror($origin_dir, $target_dir, $iterator, $options);
+		}
+		catch (\Symfony\Component\Filesystem\Exception\IOException $e)
+		{
+			$msg = $e->getMessage();
+			$filename = substr($msg, strpos($msg, '"'), strrpos($msg, '"'));
+
+			throw new filesystem_exception('CANNOT_MIRROR_DIRECTORY', $filename, array(), $e);
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function mkdir($dirs, $mode = 0777)
+	{
+		try
+		{
+			$this->symfony_filesystem->mkdir($dirs, $mode);
+		}
+		catch (\Symfony\Component\Filesystem\Exception\IOException $e)
+		{
+			$msg = $e->getMessage();
+			$filename = substr($msg, strpos($msg, '"'), strrpos($msg, '"'));
+
+			throw new filesystem_exception('CANNOT_CREATE_DIRECTORY', $filename, array(), $e);
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function phpbb_chmod($files, $perms = null, $recursive = false, $force_chmod_link = false)
+	{
+		if (is_null($perms))
+		{
+			// Default to read permission for compatibility reasons
+			$perms = self::CHMOD_READ;
+		}
+
+		if (empty($this->chmod_info))
+		{
+			if (!function_exists('fileowner') || !function_exists('filegroup'))
+			{
+				$this->chmod_info['process'] = false;
+			}
+			else
+			{
+				$common_php_owner	= @fileowner(__FILE__);
+				$common_php_group	= @filegroup(__FILE__);
+
+				// And the owner and the groups PHP is running under.
+				$php_uid	= (function_exists('posix_getuid')) ? @posix_getuid() : false;
+				$php_gids	= (function_exists('posix_getgroups')) ? @posix_getgroups() : false;
+
+				// If we are unable to get owner/group, then do not try to set them by guessing
+				if (!$php_uid || empty($php_gids) || !$common_php_owner || !$common_php_group)
+				{
+					$this->chmod_info['process'] = false;
+				}
+				else
+				{
+					$this->chmod_info = array(
+						'process'		=> true,
+						'common_owner'	=> $common_php_owner,
+						'common_group'	=> $common_php_group,
+						'php_uid'		=> $php_uid,
+						'php_gids'		=> $php_gids,
+					);
+				}
+			}
+		}
+
+		if ($this->chmod_info['process'])
+		{
+			try
+			{
+				foreach ($this->to_iterator($files) as $file)
+				{
+					$file_uid = @fileowner($file);
+					$file_gid = @filegroup($file);
+
+					// Change owner
+					if ($file_uid !== $this->chmod_info['common_owner'])
+					{
+						$this->chown($file, $this->chmod_info['common_owner'], $recursive);
+					}
+
+					// Change group
+					if ($file_gid !== $this->chmod_info['common_group'])
+					{
+						$this->chgrp($file, $this->chmod_info['common_group'], $recursive);
+					}
+
+					clearstatcache();
+					$file_uid = @fileowner($file);
+					$file_gid = @filegroup($file);
+				}
+			}
+			catch (filesystem_exception $e)
+			{
+				$this->chmod_info['process'] = false;
+			}
+		}
+
+		// Still able to process?
+		if ($this->chmod_info['process'])
+		{
+			if ($file_uid === $this->chmod_info['php_uid'])
+			{
+				$php = 'owner';
+			}
+			else if (in_array($file_gid, $this->chmod_info['php_gids']))
+			{
+				$php = 'group';
+			}
+			else
+			{
+				// Since we are setting the everyone bit anyway, no need to do expensive operations
+				$this->chmod_info['process'] = false;
+			}
+		}
+
+		// We are not able to determine or change something
+		if (!$this->chmod_info['process'])
+		{
+			$php = 'other';
+		}
+
+		switch ($php)
+		{
+			case 'owner':
+				try
+				{
+					$this->chmod($files, $perms, $recursive, $force_chmod_link);
+					clearstatcache();
+					if ($this->is_readable($files) && $this->is_writable($files))
+					{
+						break;
+					}
+				}
+				catch (filesystem_exception $e)
+				{
+					// Do nothing
+				}
+			case 'group':
+				try
+				{
+					$this->chmod($files, $perms, $recursive, $force_chmod_link);
+					clearstatcache();
+					if ((!($perms & self::CHMOD_READ) || $this->is_readable($files, $recursive)) && (!($perms & self::CHMOD_WRITE) || $this->is_writable($files, $recursive)))
+					{
+						break;
+					}
+				}
+				catch (filesystem_exception $e)
+				{
+					// Do nothing
+				}
+			case 'other':
+			default:
+				$this->chmod($files, $perms, $recursive, $force_chmod_link);
+			break;
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function realpath($path)
+	{
+		if (!function_exists('realpath'))
+		{
+			return $this->phpbb_own_realpath($path);
+		}
+
+		$realpath = realpath($path);
+
+		// Strangely there are provider not disabling realpath but returning strange values. :o
+		// We at least try to cope with them.
+		if ((!$this->is_absolute_path($path) && $realpath === $path) || $realpath === false)
+		{
+			return $this->phpbb_own_realpath($path);
+		}
+
+		// Check for DIRECTORY_SEPARATOR at the end (and remove it!)
+		if (substr($realpath, -1) === DIRECTORY_SEPARATOR)
+		{
+			$realpath = substr($realpath, 0, -1);
+		}
+
+		return $realpath;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function remove($files)
+	{
+		try
+		{
+			$this->symfony_filesystem->remove($files);
+		}
+		catch (\Symfony\Component\Filesystem\Exception\IOException $e)
+		{
+			// Try to recover filename
+			// By the time this is written that is at the end of the message
+			$error = trim($e->getMessage());
+			$file = substr($error, strrpos($error, ' '));
+
+			throw new filesystem_exception('CANNOT_DELETE_FILES', $file, array(), $e);
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function rename($origin, $target, $overwrite = false)
+	{
+		try
+		{
+			$this->symfony_filesystem->rename($origin, $target, $overwrite);
+		}
+		catch (\Symfony\Component\Filesystem\Exception\IOException $e)
+		{
+			$msg = $e->getMessage();
+			$filename = substr($msg, strpos($msg, '"'), strrpos($msg, '"'));
+
+			throw new filesystem_exception('CANNOT_RENAME_FILE', $filename, array(), $e);
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function symlink($origin_dir, $target_dir, $copy_on_windows = false)
+	{
+		try
+		{
+			$this->symfony_filesystem->symlink($origin_dir, $target_dir, $copy_on_windows);
+		}
+		catch (\Symfony\Component\Filesystem\Exception\IOException $e)
+		{
+			throw new filesystem_exception('CANNOT_CREATE_SYMLINK', $origin_dir, array(), $e);
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function touch($files, $time = null, $access_time = null)
+	{
+		try
+		{
+			$this->symfony_filesystem->touch($files, $time, $access_time);
+		}
+		catch (\Symfony\Component\Filesystem\Exception\IOException $e)
+		{
+			// Try to recover filename
+			// By the time this is written that is at the end of the message
+			$error = trim($e->getMessage());
+			$file = substr($error, strrpos($error, ' '));
+
+			throw new filesystem_exception('CANNOT_TOUCH_FILES', $file, array(), $e);
+		}
+	}
+
+	/**
+	 * phpBB's implementation of is_writable
+	 *
+	 * @todo Investigate if is_writable is still buggy
+	 *
+	 * @param string	$file	file/directory to check if writable
+	 *
+	 * @return bool	true if the given path is writable
+	 */
+	protected function phpbb_is_writable($file)
+	{
+		if (file_exists($file))
+		{
+			// Canonicalise path to absolute path
+			$file = $this->realpath($file);
+
+			if (is_dir($file))
+			{
+				// Test directory by creating a file inside the directory
+				$result = @tempnam($file, 'i_w');
+
+				if (is_string($result) && file_exists($result))
+				{
+					unlink($result);
+
+					// Ensure the file is actually in the directory (returned realpathed)
+					return (strpos($result, $file) === 0) ? true : false;
+				}
+			}
+			else
+			{
+				$handle = @fopen($file, 'c');
+
+				if (is_resource($handle))
+				{
+					fclose($handle);
+					return true;
+				}
+			}
+		}
+		else
+		{
+			// file does not exist test if we can write to the directory
+			$dir = dirname($file);
+
+			if (file_exists($dir) && is_dir($dir) && $this->phpbb_is_writable($dir))
+			{
+				return true;
+			}
+		}
+
+		return false;
+	}
+
+	/**
+	 * Try to resolve real path when PHP's realpath failes to do so
+	 *
+	 * @param string	$path
+	 * @return bool|string
+	 */
+	protected function phpbb_own_realpath($path)
+	{
+		// Replace all directory separators with '/'
+		$path = str_replace(DIRECTORY_SEPARATOR, '/', $path);
+
+		$is_absolute_path = false;
+		$path_prefix = '';
+
+		if ($this->is_absolute_path($path))
+		{
+			$is_absolute_path = true;
+		}
+		else
+		{
+			// Resolve working directory and store it
+			if (is_null($this->working_directory))
+			{
+				if (function_exists('getcwd'))
+				{
+					$this->working_directory = str_replace(DIRECTORY_SEPARATOR, '/', getcwd());
+				}
+
+				//
+				// From this point on we really just guessing
+				// If chdir were called we screwed
+				//
+				else if (function_exists('debug_backtrace'))
+				{
+					$call_stack = debug_backtrace(0);
+					$this->working_directory = str_replace(DIRECTORY_SEPARATOR, '/', dirname($call_stack[count($call_stack) - 1]['file']));
+				}
+				else
+				{
+					//
+					// Assuming that the working directory is phpBB root
+					// we could use this as a fallback, when phpBB will use controllers
+					// everywhere this will be a safe assumption
+					//
+					//$dir_parts = explode(DIRECTORY_SEPARATOR, __DIR__);
+					//$namespace_parts = explode('\\', trim(__NAMESPACE__, '\\'));
+
+					//$namespace_part_count = count($namespace_parts);
+
+					// Check if we still loading from root
+					//if (array_slice($dir_parts, -$namespace_part_count) === $namespace_parts)
+					//{
+					//	$this->working_directory = implode('/', array_slice($dir_parts, 0, -$namespace_part_count));
+					//}
+					//else
+					//{
+					//	$this->working_directory = false;
+					//}
+
+					$this->working_directory = false;
+				}
+			}
+
+			if ($this->working_directory !== false)
+			{
+				$is_absolute_path = true;
+				$path = $this->working_directory . '/' . $path;
+			}
+		}
+
+		if ($is_absolute_path)
+		{
+			if (defined('PHP_WINDOWS_VERSION_MAJOR'))
+			{
+				$path_prefix = $path[0] . ':';
+				$path = substr($path, 2);
+			}
+			else
+			{
+				$path_prefix = '';
+			}
+		}
+
+		$resolved_path = $this->resolve_path($path, $path_prefix, $is_absolute_path);
+		if ($resolved_path === false)
+		{
+			return false;
+		}
+
+		if (!@file_exists($resolved_path) || (!@is_dir($resolved_path . '/') && !is_file($resolved_path)))
+		{
+			return false;
+		}
+
+		// Return OS specific directory separators
+		$resolved = str_replace('/', DIRECTORY_SEPARATOR, $resolved_path);
+
+		// Check for DIRECTORY_SEPARATOR at the end (and remove it!)
+		if (substr($resolved, -1) === DIRECTORY_SEPARATOR)
+		{
+			return substr($resolved, 0, -1);
+		}
+
+		return $resolved;
+	}
+
+	/**
+	 * Convert file(s) to \Traversable object
+	 *
+	 * This is the same function as Symfony's toIterator, but that is private
+	 * so we cannot use it.
+	 *
+	 * @param string|array|\Traversable	$files	filename/list of filenames
+	 * @return \Traversable
+	 */
+	protected function to_iterator($files)
+	{
+		if (!$files instanceof \Traversable)
+		{
+			$files = new \ArrayObject(is_array($files) ? $files : array($files));
+		}
+
+		return $files;
+	}
+
+	/**
+	 * Try to resolve symlinks in path
+	 *
+	 * @param string	$path			The path to resolve
+	 * @param string	$prefix			The path prefix (on windows the drive letter)
+	 * @param bool 		$absolute		Whether or not the path is absolute
+	 * @param bool		$return_array	Whether or not to return path parts
+	 *
+	 * @return string|array|bool	returns the resolved path or an array of parts of the path if $return_array is true
+	 * 								or false if path cannot be resolved
+	 */
+	protected function resolve_path($path, $prefix = '', $absolute = false, $return_array = false)
+	{
+		if ($return_array)
+		{
+			$path = str_replace(DIRECTORY_SEPARATOR, '/', $path);
+		}
+
+		trim ($path, '/');
+		$path_parts = explode('/', $path);
+		$resolved = array();
+		$resolved_path = $prefix;
+		$file_found = false;
+
+		foreach ($path_parts as $path_part)
+		{
+			if ($file_found)
+			{
+				return false;
+			}
+
+			if (empty($path_part) || ($path_part === '.' && ($absolute || !empty($resolved))))
+			{
+				continue;
+			}
+			else if ($absolute && $path_part === '..')
+			{
+				if (empty($resolved))
+				{
+					// No directories above root
+					return false;
+				}
+
+				array_pop($resolved);
+				$resolved_path = false;
+			}
+			else if ($path_part === '..' && !empty($resolved) && !in_array($resolved[count($resolved) - 1], array('.', '..')))
+			{
+				array_pop($resolved);
+				$resolved_path = false;
+			}
+			else
+			{
+				if ($resolved_path === false)
+				{
+					if (empty($resolved))
+					{
+						$resolved_path = ($absolute) ? $prefix . '/' . $path_part : $path_part;
+					}
+					else
+					{
+						$tmp_array = $resolved;
+						if ($absolute)
+						{
+							array_unshift($tmp_array, $prefix);
+						}
+
+						$resolved_path = implode('/', $tmp_array);
+					}
+				}
+
+				$current_path = $resolved_path . '/' . $path_part;
+
+				// Resolve symlinks
+				if (@is_link($current_path))
+				{
+					if (!function_exists('readlink'))
+					{
+						return false;
+					}
+
+					$link = readlink($current_path);
+
+					// Is link has an absolute path in it?
+					if ($this->is_absolute_path($link))
+					{
+						if (defined('PHP_WINDOWS_VERSION_MAJOR'))
+						{
+							$prefix = $link[0] . ':';
+							$link = substr($link, 2);
+						}
+						else
+						{
+							$prefix = '';
+						}
+
+						$resolved = $this->resolve_path($link, $prefix, true, true);
+						$absolute = true;
+					}
+					else
+					{
+						$resolved = $this->resolve_path($resolved_path . '/' . $link, $prefix, $absolute, true);
+					}
+
+					if (!$resolved)
+					{
+						return false;
+					}
+
+					$resolved_path = false;
+				}
+				else if (@is_dir($current_path . '/'))
+				{
+					$resolved[] = $path_part;
+					$resolved_path = $current_path;
+				}
+				else if (@is_file($current_path))
+				{
+					$resolved[] = $path_part;
+					$resolved_path = $current_path;
+					$file_found = true;
+				}
+				else
+				{
+					return false;
+				}
+			}
+		}
+
+		// If at the end of the path there were a .. or .
+		// we need to build the path again.
+		// Only doing this when a string is expected in return
+		if ($resolved_path === false && $return_array === false)
+		{
+			if (empty($resolved))
+			{
+				$resolved_path = ($absolute) ? $prefix . '/' : './';
+			}
+			else
+			{
+				$tmp_array = $resolved;
+				if ($absolute)
+				{
+					array_unshift($tmp_array, $prefix);
+				}
+
+				$resolved_path = implode('/', $tmp_array);
+			}
+		}
+
+		return ($return_array) ? $resolved : $resolved_path;
+	}
+}
diff --git a/phpBB/phpbb/filesystem/filesystem_interface.php b/phpBB/phpbb/filesystem/filesystem_interface.php
new file mode 100644
index 0000000000..1093be2499
--- /dev/null
+++ b/phpBB/phpbb/filesystem/filesystem_interface.php
@@ -0,0 +1,284 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\filesystem;
+
+/**
+ * Interface for phpBB's filesystem service
+ */
+interface filesystem_interface
+{
+	/**
+	 * chmod all permissions flag
+	 *
+	 * @var int
+	 */
+	const CHMOD_ALL = 7;
+
+	/**
+	 * chmod read permissions flag
+	 *
+	 * @var int
+	 */
+	const CHMOD_READ = 4;
+
+	/**
+	 * chmod write permissions flag
+	 *
+	 * @var int
+	 */
+	const CHMOD_WRITE = 2;
+
+	/**
+	 * chmod execute permissions flag
+	 *
+	 * @var int
+	 */
+	const CHMOD_EXECUTE = 1;
+
+	/**
+	 * Change owner group of files/directories
+	 *
+	 * @param string|array|\Traversable	$files		The file(s)/directorie(s) to change group
+	 * @param string					$group		The group that should own the files/directories
+	 * @param bool 						$recursive	If the group should be changed recursively
+	 * @throws \phpbb\filesystem\exception\filesystem_exception	the filename which triggered the error can be
+	 * 															retrieved by filesystem_exception::get_filename()
+	 */
+	public function chgrp($files, $group, $recursive = false);
+
+	/**
+	 * Global function for chmodding directories and files for internal use
+	 *
+	 * The function accepts filesystem_interface::CHMOD_ flags in the permission argument
+	 * or the user can specify octal values (or any integer if it makes sense). All directories will have
+	 * an execution bit appended, if the user group (owner, group or other) has any bit specified.
+	 *
+	 * @param string|array|\Traversable	$files				The file/directory to be chmodded
+	 * @param int						$perms				Permissions to set
+	 * @param bool						$recursive			If the permissions should be changed recursively
+	 * @param bool						$force_chmod_link	Try to apply permissions to symlinks as well
+	 *
+	 * @throws \phpbb\filesystem\exception\filesystem_exception	the filename which triggered the error can be
+	 * 															retrieved by filesystem_exception::get_filename()
+	 */
+	public function chmod($files, $perms = null, $recursive = false, $force_chmod_link = false);
+
+	/**
+	 * Change owner group of files/directories
+	 *
+	 * @param string|array|\Traversable	$files		The file(s)/directorie(s) to change group
+	 * @param string					$user		The owner user name
+	 * @param bool 						$recursive	Whether change the owner recursively or not
+	 *
+	 * @throws \phpbb\filesystem\exception\filesystem_exception	the filename which triggered the error can be
+	 * 															retrieved by filesystem_exception::get_filename()
+	 */
+	public function chown($files, $user, $recursive = false);
+
+	/**
+	 * Eliminates useless . and .. components from specified path.
+	 *
+	 * @param string $path Path to clean
+	 *
+	 * @return string Cleaned path
+	 */
+	public function clean_path($path);
+
+	/**
+	 * Copies a file.
+	 *
+	 * This method only copies the file if the origin file is newer than the target file.
+	 *
+	 * By default, if the target already exists, it is not overridden.
+	 *
+	 * @param string	$origin_file	The original filename
+	 * @param string	$target_file	The target filename
+	 * @param bool		$override		Whether to override an existing file or not
+	 *
+	 * @throws \phpbb\filesystem\exception\filesystem_exception When the file cannot be copied
+	 */
+	public function copy($origin_file, $target_file, $override = false);
+
+	/**
+	 * Atomically dumps content into a file.
+	 *
+	 * @param string	$filename	The file to be written to.
+	 * @param string	$content	The data to write into the file.
+	 *
+	 * @throws \phpbb\filesystem\exception\filesystem_exception When the file cannot be written
+	 */
+	public function dump_file($filename, $content);
+
+	/**
+	 * Checks the existence of files or directories.
+	 *
+	 * @param string|array|\Traversable	$files	files/directories to check
+	 *
+	 * @return bool	Returns true if all files/directories exist, false otherwise
+	 */
+	public function exists($files);
+
+	/**
+	 * Checks if a path is absolute or not
+	 *
+	 * @param string	$path	Path to check
+	 *
+	 * @return	bool	true if the path is absolute, false otherwise
+	 */
+	public function is_absolute_path($path);
+
+	/**
+	 * Checks if files/directories are readable
+	 *
+	 * @param string|array|\Traversable	$files		files/directories to check
+	 * @param bool						$recursive	Whether or not directories should be checked recursively
+	 *
+	 * @return bool True when the files/directories are readable, otherwise false.
+	 */
+	public function is_readable($files, $recursive = false);
+
+	/**
+	 * Test if a file/directory is writable
+	 *
+	 * @param string|array|\Traversable	$files		files/directories to perform write test on
+	 * @param bool						$recursive	Whether or not directories should be checked recursively
+	 *
+	 * @return bool True when the files/directories are writable, otherwise false.
+	 */
+	public function is_writable($files, $recursive = false);
+
+	/**
+	 * Given an existing path, convert it to a path relative to a given starting path
+	 *
+	 * @param string $end_path		Absolute path of target
+	 * @param string $start_path	Absolute path where traversal begins
+	 *
+	 * @return string Path of target relative to starting path
+	 */
+	public function make_path_relative($end_path, $start_path);
+
+	/**
+	 * Mirrors a directory to another.
+	 *
+	 * @param string		$origin_dir	The origin directory
+	 * @param string		$target_dir	The target directory
+	 * @param \Traversable	$iterator	A Traversable instance
+	 * @param array			$options	An array of boolean options
+	 *									Valid options are:
+	 *										- $options['override'] Whether to override an existing file on copy or not (see copy())
+	 *										- $options['copy_on_windows'] Whether to copy files instead of links on Windows (see symlink())
+	 *										- $options['delete'] Whether to delete files that are not in the source directory (defaults to false)
+	 *
+	 * @throws \phpbb\filesystem\exception\filesystem_exception When the file cannot be copied.
+	 * 															The filename which triggered the error can be
+	 * 															retrieved by filesystem_exception::get_filename()
+	 */
+	public function mirror($origin_dir, $target_dir, \Traversable $iterator = null, $options = array());
+
+	/**
+	 * Creates a directory recursively.
+	 *
+	 * @param string|array|\Traversable	$dirs	The directory path
+	 * @param int						$mode	The directory mode
+	 *
+	 * @throws \phpbb\filesystem\exception\filesystem_exception On any directory creation failure
+	 * 															The filename which triggered the error can be
+	 * 															retrieved by filesystem_exception::get_filename()
+	 */
+	public function mkdir($dirs, $mode = 0777);
+
+	/**
+	 * Global function for chmodding directories and files for internal use
+	 *
+	 * This function determines owner and group whom the file belongs to and user and group of PHP and then set safest possible file permissions.
+	 * The function determines owner and group from common.php file and sets the same to the provided file.
+	 * The function uses bit fields to build the permissions.
+	 * The function sets the appropiate execute bit on directories.
+	 *
+	 * Supported constants representing bit fields are:
+	 *
+	 * filesystem_interface::CHMOD_ALL - all permissions (7)
+	 * filesystem_interface::CHMOD_READ - read permission (4)
+	 * filesystem_interface::CHMOD_WRITE - write permission (2)
+	 * filesystem_interface::CHMOD_EXECUTE - execute permission (1)
+	 *
+	 * NOTE: The function uses POSIX extension and fileowner()/filegroup() functions. If any of them is disabled, this function tries to build proper permissions, by calling is_readable() and is_writable() functions.
+	 *
+	 * @param string|array|\Traversable	$file				The file/directory to be chmodded
+	 * @param int						$perms				Permissions to set
+	 * @param bool						$recursive			If the permissions should be changed recursively
+	 * @param bool						$force_chmod_link	Try to apply permissions to symlinks as well
+	 *
+	 * @throws \phpbb\filesystem\exception\filesystem_exception	the filename which triggered the error can be
+	 * 															retrieved by filesystem_exception::get_filename()
+	 */
+	public function phpbb_chmod($file, $perms = null, $recursive = false, $force_chmod_link = false);
+
+	/**
+	 * A wrapper for PHP's realpath
+	 *
+	 * Try to resolve realpath when PHP's realpath is not available, or
+	 * known to be buggy.
+	 *
+	 * @param string	$path	Path to resolve
+	 *
+	 * @return string	Resolved path
+	 */
+	public function realpath($path);
+
+	/**
+	 * Removes files or directories.
+	 *
+	 * @param string|array|\Traversable	$files	A filename, an array of files, or a \Traversable instance to remove
+	 *
+	 * @throws \phpbb\filesystem\exception\filesystem_exception When removal fails.
+	 * 															The filename which triggered the error can be
+	 * 															retrieved by filesystem_exception::get_filename()
+	 */
+	public function remove($files);
+
+	/**
+	 * Renames a file or a directory.
+	 *
+	 * @param string	$origin		The origin filename or directory
+	 * @param string	$target		The new filename or directory
+	 * @param bool		$overwrite	Whether to overwrite the target if it already exists
+	 *
+	 * @throws \phpbb\filesystem\exception\filesystem_exception	When target file or directory already exists,
+	 * 															or origin cannot be renamed.
+	 */
+	public function rename($origin, $target, $overwrite = false);
+
+	/**
+	 * Creates a symbolic link or copy a directory.
+	 *
+	 * @param string	$origin_dir			The origin directory path
+	 * @param string	$target_dir			The symbolic link name
+	 * @param bool		$copy_on_windows	Whether to copy files if on Windows
+	 *
+	 * @throws \phpbb\filesystem\exception\filesystem_exception When symlink fails
+	 */
+	public function symlink($origin_dir, $target_dir, $copy_on_windows = false);
+
+	/**
+	 * Sets access and modification time of file.
+	 *
+	 * @param string|array|\Traversable	$files			A filename, an array of files, or a \Traversable instance to create
+	 * @param int						$time			The touch time as a Unix timestamp
+	 * @param int						$access_time	The access time as a Unix timestamp
+	 *
+	 * @throws \phpbb\filesystem\exception\filesystem_exception	When touch fails
+	 */
+	public function touch($files, $time = null, $access_time = null);
+}
diff --git a/phpBB/phpbb/finder.php b/phpBB/phpbb/finder.php
index 28f28825ba..1f1d931880 100644
--- a/phpBB/phpbb/finder.php
+++ b/phpBB/phpbb/finder.php
@@ -48,14 +48,14 @@ class finder
 	/**
 	* Creates a new finder instance with its dependencies
 	*
-	* @param \phpbb\filesystem $filesystem Filesystem instance
+	* @param \phpbb\filesystem\filesystem_interface $filesystem Filesystem instance
 	* @param string $phpbb_root_path Path to the phpbb root directory
-	* @param \phpbb\cache\driver\driver_interface $cache A cache instance or null
+	* @param \phpbb\cache\service $cache A cache instance or null
 	* @param string $php_ext php file extension
 	* @param string $cache_name The name of the cache variable, defaults to
 	*                           _ext_finder
 	*/
-	public function __construct(\phpbb\filesystem $filesystem, $phpbb_root_path = '', \phpbb\cache\driver\driver_interface $cache = null, $php_ext = 'php', $cache_name = '_ext_finder')
+	public function __construct(\phpbb\filesystem\filesystem_interface $filesystem, $phpbb_root_path = '', \phpbb\cache\service $cache = null, $php_ext = 'php', $cache_name = '_ext_finder')
 	{
 		$this->filesystem = $filesystem;
 		$this->phpbb_root_path = $phpbb_root_path;
diff --git a/phpBB/phpbb/group/helper.php b/phpBB/phpbb/group/helper.php
new file mode 100644
index 0000000000..aa3876b325
--- /dev/null
+++ b/phpBB/phpbb/group/helper.php
@@ -0,0 +1,294 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\group;
+
+use phpbb\auth\auth;
+use phpbb\cache\service as cache;
+use phpbb\config\config;
+use phpbb\language\language;
+use phpbb\event\dispatcher_interface;
+use phpbb\path_helper;
+use phpbb\user;
+
+class helper
+{
+	/** @var auth */
+	protected $auth;
+
+	/** @var cache */
+	protected $cache;
+
+	/** @var config */
+	protected $config;
+
+	/** @var language */
+	protected $language;
+
+	/** @var dispatcher_interface */
+	protected $dispatcher;
+
+	/** @var path_helper */
+	protected $path_helper;
+
+	/** @var user */
+	protected $user;
+
+	/** @var string phpBB root path */
+	protected $phpbb_root_path;
+
+	/** @var array Return templates for a group name string */
+	protected $name_strings;
+
+	/**
+	 * Constructor
+	 *
+	 * @param auth					$auth			Authentication object
+	 * @param cache					$cache			Cache service object
+	 * @param config				$config			Configuration object
+	 * @param language				$language		Language object
+	 * @param dispatcher_interface	$dispatcher		Event dispatcher object
+	 * @param path_helper			$path_helper	Path helper object
+	 * @param user					$user			User object
+	 */
+	public function __construct(auth $auth, cache $cache, config $config, language $language, dispatcher_interface $dispatcher, path_helper $path_helper, user $user)
+	{
+		$this->auth = $auth;
+		$this->cache = $cache;
+		$this->config = $config;
+		$this->language = $language;
+		$this->dispatcher = $dispatcher;
+		$this->path_helper = $path_helper;
+		$this->user = $user;
+
+		$this->phpbb_root_path = $path_helper->get_phpbb_root_path();
+
+		/** @html Group name spans and links for usage in the template */
+		$this->name_strings = array(
+			'base_url'				=> "{$path_helper->get_phpbb_root_path()}memberlist.{$path_helper->get_php_ext()}?mode=group&amp;g={GROUP_ID}",
+			'tpl_noprofile'			=> '<span class="username">{GROUP_NAME}</span>',
+			'tpl_noprofile_colour'	=> '<span class="username-coloured" style="color: {GROUP_COLOUR};">{GROUP_NAME}</span>',
+			'tpl_profile'			=> '<a class="username" href="{PROFILE_URL}">{GROUP_NAME}</a>',
+			'tpl_profile_colour'	=> '<a class="username-coloured" href="{PROFILE_URL}" style="color: {GROUP_COLOUR};">{GROUP_NAME}</a>',
+		);
+	}
+
+	/**
+	 * @param $group_name string	The stored group name
+	 *
+	 * @return string		Group name or translated group name if it exists
+	 */
+	public function get_name($group_name)
+	{
+		return $this->language->is_set('G_' . utf8_strtoupper($group_name)) ? $this->language->lang('G_' . utf8_strtoupper($group_name)) : $group_name;
+	}
+
+	/**
+	 * Get group name details for placing into templates.
+	 *
+	 * @html Group name spans and links
+	 *
+	 * @param string	$mode				Profile (for getting an url to the profile),
+	 *											group_name (for obtaining the group name),
+	 *											colour (for obtaining the group colour),
+	 *											full (for obtaining a coloured group name link to the group's profile),
+	 *											no_profile (the same as full but forcing no profile link)
+	 * @param int		$group_id			The group id
+	 * @param string	$group_name			The group name
+	 * @param string	$group_colour		The group colour
+	 * @param mixed		$custom_profile_url	optional parameter to specify a profile url. The group id gets appended to this url as &amp;g={group_id}
+	 *
+	 * @return string A string consisting of what is wanted based on $mode.
+	 */
+	public function get_name_string($mode, $group_id, $group_name, $group_colour = '', $custom_profile_url = false)
+	{
+		$s_is_bots = ($group_name === 'BOTS');
+
+		// This switch makes sure we only run code required for the mode
+		switch ($mode)
+		{
+			case 'full':
+			case 'no_profile':
+			case 'colour':
+
+				// Build correct group colour
+				$group_colour = $group_colour ? '#' . $group_colour : '';
+
+				// Return colour
+				if ($mode === 'colour')
+				{
+					$group_name_string = $group_colour;
+					break;
+				}
+
+			// no break;
+
+			case 'group_name':
+
+				// Build correct group name
+				$group_name = $this->get_name($group_name);
+
+				// Return group name
+				if ($mode === 'group_name')
+				{
+					$group_name_string = $group_name;
+					break;
+				}
+
+			// no break;
+
+			case 'profile':
+
+				// Build correct profile url - only show if not anonymous and permission to view profile if registered user
+				// For anonymous the link leads to a login page.
+				if ($group_id && !$s_is_bots && ($this->user->data['user_id'] == ANONYMOUS || $this->auth->acl_get('u_viewprofile')))
+				{
+					$profile_url = ($custom_profile_url !== false) ? $custom_profile_url . '&amp;g=' . (int) $group_id : str_replace(array('={GROUP_ID}', '=%7BGROUP_ID%7D'), '=' . (int) $group_id, append_sid($this->name_strings['base_url']));
+				}
+				else
+				{
+					$profile_url = '';
+				}
+
+				// Return profile
+				if ($mode === 'profile')
+				{
+					$group_name_string = $profile_url;
+					break;
+				}
+
+			// no break;
+		}
+
+		if (!isset($group_name_string))
+		{
+			if (($mode === 'full' && empty($profile_url)) || $mode === 'no_profile' || $s_is_bots)
+			{
+				$group_name_string = str_replace(array('{GROUP_COLOUR}', '{GROUP_NAME}'), array($group_colour, $group_name), (!$group_colour) ? $this->name_strings['tpl_noprofile'] : $this->name_strings['tpl_noprofile_colour']);
+			}
+			else
+			{
+				$group_name_string = str_replace(array('{PROFILE_URL}', '{GROUP_COLOUR}', '{GROUP_NAME}'), array($profile_url, $group_colour, $group_name), (!$group_colour) ? $this->name_strings['tpl_profile'] : $this->name_strings['tpl_profile_colour']);
+			}
+		}
+
+		$name_strings = $this->name_strings;
+
+		/**
+		 * Use this event to change the output of the group name
+		 *
+		 * @event core.modify_group_name_string
+		 * @var string	mode				profile|group_name|colour|full|no_profile
+		 * @var int		group_id			The group identifier
+		 * @var string	group_name			The group name
+		 * @var string	group_colour		The group colour
+		 * @var string	custom_profile_url	Optional parameter to specify a profile url.
+		 * @var string	group_name_string	The string that has been generated
+		 * @var array	name_strings		Array of original return templates
+		 * @since 3.2.8-RC1
+		 */
+		$vars = array(
+			'mode',
+			'group_id',
+			'group_name',
+			'group_colour',
+			'custom_profile_url',
+			'group_name_string',
+			'name_strings',
+		);
+		extract($this->dispatcher->trigger_event('core.modify_group_name_string', compact($vars)));
+
+		return $group_name_string;
+	}
+
+	/**
+	 * Get group rank title and image
+	 *
+	 * @html Group rank image element
+	 *
+	 * @param array		$group_data		The current stored group data
+	 *
+	 * @return array					An associative array containing the rank title (title),
+	 * 									the rank image as full img tag (img) and the rank image source (img_src)
+	 */
+	public function get_rank($group_data)
+	{
+		$group_rank_data = array(
+			'title'		=> null,
+			'img'		=> null,
+			'img_src'	=> null,
+		);
+
+		/**
+		 * Preparing a group's rank before displaying
+		 *
+		 * @event core.get_group_rank_before
+		 * @var	array	group_data		Array with group's data
+		 * @since 3.2.8-RC1
+		 */
+
+		$vars = array('group_data');
+		extract($this->dispatcher->trigger_event('core.get_group_rank_before', compact($vars)));
+
+		if (!empty($group_data['group_rank']))
+		{
+			// Only obtain ranks if group rank is set
+			$ranks = $this->cache->obtain_ranks();
+
+			if (isset($ranks['special'][$group_data['group_rank']]))
+			{
+				$rank = $ranks['special'][$group_data['group_rank']];
+
+				$group_rank_data['title'] = $rank['rank_title'];
+
+				$group_rank_data['img_src'] = (!empty($rank['rank_image'])) ? $this->path_helper->update_web_root_path($this->phpbb_root_path . $this->config['ranks_path'] . '/' . $rank['rank_image']) : '';
+
+				/** @html Group rank image element for usage in the template */
+				$group_rank_data['img'] = (!empty($rank['rank_image'])) ? '<img src="' . $group_rank_data['img_src'] . '" alt="' . $rank['rank_title'] . '" title="' . $rank['rank_title'] . '" />' : '';
+			}
+		}
+
+		/**
+		 * Modify a group's rank before displaying
+		 *
+		 * @event core.get_group_rank_after
+		 * @var	array	group_data		Array with group's data
+		 * @var	array	group_rank_data	Group rank data
+		 * @since 3.2.8-RC1
+		 */
+
+		$vars = array(
+			'group_data',
+			'group_rank_data',
+		);
+		extract($this->dispatcher->trigger_event('core.get_group_rank_after', compact($vars)));
+
+		return $group_rank_data;
+	}
+
+	/**
+	 * Get group avatar.
+	 * Wrapper function for phpbb_get_group_avatar()
+	 *
+	 * @param array		$group_row		Row from the groups table
+	 * @param string	$alt			Optional language string for alt tag within image, can be a language key or text
+	 * @param bool		$ignore_config	Ignores the config-setting, to be still able to view the avatar in the UCP
+	 * @param bool		$lazy			If true, will be lazy loaded (requires JS)
+	 *
+	 * @return string 					Avatar html
+	 */
+	function get_avatar($group_row, $alt = 'GROUP_AVATAR', $ignore_config = false, $lazy = false)
+	{
+		return phpbb_get_group_avatar($group_row, $alt, $ignore_config, $lazy);
+	}
+}
diff --git a/phpBB/phpbb/help/controller/bbcode.php b/phpBB/phpbb/help/controller/bbcode.php
new file mode 100644
index 0000000000..e16f99023d
--- /dev/null
+++ b/phpBB/phpbb/help/controller/bbcode.php
@@ -0,0 +1,85 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\help\controller;
+
+/**
+ * BBCode help page
+ */
+class bbcode extends controller
+{
+	/**
+	 * @return string The title of the page
+	 */
+	public function display()
+	{
+		$this->language->add_lang('help/bbcode');
+
+		$this->manager->add_block(
+			'HELP_BBCODE_BLOCK_INTRO',
+			false,
+			array(
+				'HELP_BBCODE_INTRO_BBCODE_QUESTION' => 'HELP_BBCODE_INTRO_BBCODE_ANSWER',
+			)
+		);
+		$this->manager->add_block(
+			'HELP_BBCODE_BLOCK_TEXT',
+			false,
+			array(
+				'HELP_BBCODE_TEXT_BASIC_QUESTION' => 'HELP_BBCODE_TEXT_BASIC_ANSWER',
+				'HELP_BBCODE_TEXT_COLOR_QUESTION' => 'HELP_BBCODE_TEXT_COLOR_ANSWER',
+				'HELP_BBCODE_TEXT_COMBINE_QUESTION' => 'HELP_BBCODE_TEXT_COMBINE_ANSWER',
+			)
+		);
+		$this->manager->add_block(
+			'HELP_BBCODE_BLOCK_QUOTES',
+			false,
+			array(
+				'HELP_BBCODE_QUOTES_TEXT_QUESTION' => 'HELP_BBCODE_QUOTES_TEXT_ANSWER',
+				'HELP_BBCODE_QUOTES_CODE_QUESTION' => 'HELP_BBCODE_QUOTES_CODE_ANSWER',
+			)
+		);
+		$this->manager->add_block(
+			'HELP_BBCODE_BLOCK_LISTS',
+			false,
+			array(
+				'HELP_BBCODE_LISTS_UNORDERER_QUESTION' => 'HELP_BBCODE_LISTS_UNORDERER_ANSWER',
+				'HELP_BBCODE_LISTS_ORDERER_QUESTION' => 'HELP_BBCODE_LISTS_ORDERER_ANSWER',
+			)
+		);
+		$this->manager->add_block(
+			'HELP_BBCODE_BLOCK_LINKS',
+			true,
+			array(
+				'HELP_BBCODE_LINKS_BASIC_QUESTION' => 'HELP_BBCODE_LINKS_BASIC_ANSWER',
+			)
+		);
+		$this->manager->add_block(
+			'HELP_BBCODE_BLOCK_IMAGES',
+			false,
+			array(
+				'HELP_BBCODE_IMAGES_BASIC_QUESTION' => 'HELP_BBCODE_IMAGES_BASIC_ANSWER',
+				'HELP_BBCODE_IMAGES_ATTACHMENT_QUESTION' => 'HELP_BBCODE_IMAGES_ATTACHMENT_ANSWER',
+			)
+		);
+		$this->manager->add_block(
+			'HELP_BBCODE_BLOCK_OTHERS',
+			false,
+			array(
+				'HELP_BBCODE_OTHERS_CUSTOM_QUESTION' => 'HELP_BBCODE_OTHERS_CUSTOM_ANSWER',
+			)
+		);
+
+		return $this->language->lang('BBCODE_GUIDE');
+	}
+}
diff --git a/phpBB/phpbb/help/controller/controller.php b/phpBB/phpbb/help/controller/controller.php
new file mode 100644
index 0000000000..29494205a9
--- /dev/null
+++ b/phpBB/phpbb/help/controller/controller.php
@@ -0,0 +1,76 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\help\controller;
+
+/**
+ * BBCode help page
+ */
+abstract class controller
+{
+	/** @var \phpbb\controller\helper */
+	protected $helper;
+
+	/** @var \phpbb\help\manager */
+	protected $manager;
+
+	/** @var \phpbb\template\template */
+	protected $template;
+
+	/** @var \phpbb\language\language */
+	protected $language;
+
+	/** @var string */
+	protected $root_path;
+
+	/** @var string */
+	protected $php_ext;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\controller\helper	$helper
+	 * @param \phpbb\help\manager		$manager
+	 * @param \phpbb\template\template	$template
+	 * @param \phpbb\language\language	$language
+	 * @param string					$root_path
+	 * @param string					$php_ext
+	 */
+	public function __construct(\phpbb\controller\helper $helper, \phpbb\help\manager $manager, \phpbb\template\template $template, \phpbb\language\language $language, $root_path, $php_ext)
+	{
+		$this->helper = $helper;
+		$this->manager = $manager;
+		$this->template = $template;
+		$this->language = $language;
+		$this->root_path = $root_path;
+		$this->php_ext = $php_ext;
+	}
+
+	/**
+	 * @return string
+	 */
+	abstract protected function display();
+
+	public function handle()
+	{
+		$title = $this->display();
+
+		$this->template->assign_vars(array(
+			'L_FAQ_TITLE'	=> $title,
+			'S_IN_FAQ'		=> true,
+		));
+
+		make_jumpbox(append_sid("{$this->root_path}viewforum.{$this->php_ext}"));
+		return $this->helper->render('faq_body.html', $title);
+	}
+}
diff --git a/phpBB/phpbb/help/controller/faq.php b/phpBB/phpbb/help/controller/faq.php
new file mode 100644
index 0000000000..5e45cfe667
--- /dev/null
+++ b/phpBB/phpbb/help/controller/faq.php
@@ -0,0 +1,165 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\help\controller;
+
+/**
+ * FAQ help page
+ */
+class faq extends controller
+{
+	/**
+	 * @return string The title of the page
+	 */
+	public function display()
+	{
+		$this->language->add_lang('help/faq');
+
+		$this->manager->add_block(
+			'HELP_FAQ_BLOCK_LOGIN',
+			false,
+			array(
+				'HELP_FAQ_LOGIN_REGISTER_QUESTION' => 'HELP_FAQ_LOGIN_REGISTER_ANSWER',
+				'HELP_FAQ_LOGIN_COPPA_QUESTION' => 'HELP_FAQ_LOGIN_COPPA_ANSWER',
+				'HELP_FAQ_LOGIN_CANNOT_REGISTER_QUESTION' => 'HELP_FAQ_LOGIN_CANNOT_REGISTER_ANSWER',
+				'HELP_FAQ_LOGIN_REGISTER_CONFIRM_QUESTION' => 'HELP_FAQ_LOGIN_REGISTER_CONFIRM_ANSWER',
+				'HELP_FAQ_LOGIN_CANNOT_LOGIN_QUESTION' => 'HELP_FAQ_LOGIN_CANNOT_LOGIN_ANSWER',
+				'HELP_FAQ_LOGIN_CANNOT_LOGIN_ANYMORE_QUESTION' => 'HELP_FAQ_LOGIN_CANNOT_LOGIN_ANYMORE_ANSWER',
+				'HELP_FAQ_LOGIN_LOST_PASSWORD_QUESTION' => 'HELP_FAQ_LOGIN_LOST_PASSWORD_ANSWER',
+				'HELP_FAQ_LOGIN_AUTO_LOGOUT_QUESTION' => 'HELP_FAQ_LOGIN_AUTO_LOGOUT_ANSWER',
+				'HELP_FAQ_LOGIN_DELETE_COOKIES_QUESTION' => 'HELP_FAQ_LOGIN_DELETE_COOKIES_ANSWER',
+			)
+		);
+		$this->manager->add_block(
+			'HELP_FAQ_BLOCK_USERSETTINGS',
+			false,
+			array(
+				'HELP_FAQ_USERSETTINGS_CHANGE_SETTINGS_QUESTION' => 'HELP_FAQ_USERSETTINGS_CHANGE_SETTINGS_ANSWER',
+				'HELP_FAQ_USERSETTINGS_HIDE_ONLINE_QUESTION' => 'HELP_FAQ_USERSETTINGS_HIDE_ONLINE_ANSWER',
+				'HELP_FAQ_USERSETTINGS_TIMEZONE_QUESTION' => 'HELP_FAQ_USERSETTINGS_TIMEZONE_ANSWER',
+				'HELP_FAQ_USERSETTINGS_SERVERTIME_QUESTION' => 'HELP_FAQ_USERSETTINGS_SERVERTIME_ANSWER',
+				'HELP_FAQ_USERSETTINGS_LANGUAGE_QUESTION' => 'HELP_FAQ_USERSETTINGS_LANGUAGE_ANSWER',
+				'HELP_FAQ_USERSETTINGS_AVATAR_QUESTION' => 'HELP_FAQ_USERSETTINGS_AVATAR_ANSWER',
+				'HELP_FAQ_USERSETTINGS_AVATAR_DISPLAY_QUESTION' => 'HELP_FAQ_USERSETTINGS_AVATAR_DISPLAY_ANSWER',
+				'HELP_FAQ_USERSETTINGS_RANK_QUESTION' => 'HELP_FAQ_USERSETTINGS_RANK_ANSWER',
+				'HELP_FAQ_USERSETTINGS_EMAIL_LOGIN_QUESTION' => 'HELP_FAQ_USERSETTINGS_EMAIL_LOGIN_ANSWER',
+			)
+		);
+		$this->manager->add_block(
+			'HELP_FAQ_BLOCK_POSTING',
+			false,
+			array(
+				'HELP_FAQ_POSTING_CREATE_QUESTION' => 'HELP_FAQ_POSTING_CREATE_ANSWER',
+				'HELP_FAQ_POSTING_EDIT_DELETE_QUESTION' => 'HELP_FAQ_POSTING_EDIT_DELETE_ANSWER',
+				'HELP_FAQ_POSTING_SIGNATURE_QUESTION' => 'HELP_FAQ_POSTING_SIGNATURE_ANSWER',
+				'HELP_FAQ_POSTING_POLL_CREATE_QUESTION' => 'HELP_FAQ_POSTING_POLL_CREATE_ANSWER',
+				'HELP_FAQ_POSTING_POLL_ADD_QUESTION' => 'HELP_FAQ_POSTING_POLL_ADD_ANSWER',
+				'HELP_FAQ_POSTING_POLL_EDIT_QUESTION' => 'HELP_FAQ_POSTING_POLL_EDIT_ANSWER',
+				'HELP_FAQ_POSTING_FORUM_RESTRICTED_QUESTION' => 'HELP_FAQ_POSTING_FORUM_RESTRICTED_ANSWER',
+				'HELP_FAQ_POSTING_NO_ATTACHMENTS_QUESTION' => 'HELP_FAQ_POSTING_NO_ATTACHMENTS_ANSWER',
+				'HELP_FAQ_POSTING_WARNING_QUESTION' => 'HELP_FAQ_POSTING_WARNING_ANSWER',
+				'HELP_FAQ_POSTING_REPORT_QUESTION' => 'HELP_FAQ_POSTING_REPORT_ANSWER',
+				'HELP_FAQ_POSTING_DRAFT_QUESTION' => 'HELP_FAQ_POSTING_DRAFT_ANSWER',
+				'HELP_FAQ_POSTING_QUEUE_QUESTION' => 'HELP_FAQ_POSTING_QUEUE_ANSWER',
+				'HELP_FAQ_POSTING_BUMP_QUESTION' => 'HELP_FAQ_POSTING_BUMP_ANSWER',
+			)
+		);
+		$this->manager->add_block(
+			'HELP_FAQ_BLOCK_FORMATTING',
+			false,
+			array(
+				'HELP_FAQ_FORMATTING_BBOCDE_QUESTION' => 'HELP_FAQ_FORMATTING_BBOCDE_ANSWER',
+				'HELP_FAQ_FORMATTING_HTML_QUESTION' => 'HELP_FAQ_FORMATTING_HTML_ANSWER',
+				'HELP_FAQ_FORMATTING_SMILIES_QUESTION' => 'HELP_FAQ_FORMATTING_SMILIES_ANSWER',
+				'HELP_FAQ_FORMATTING_IMAGES_QUESTION' => 'HELP_FAQ_FORMATTING_IMAGES_ANSWER',
+				'HELP_FAQ_FORMATTING_GLOBAL_ANNOUNCE_QUESTION' => 'HELP_FAQ_FORMATTING_GLOBAL_ANNOUNCE_ANSWER',
+				'HELP_FAQ_FORMATTING_ANNOUNCEMENT_QUESTION' => 'HELP_FAQ_FORMATTING_ANNOUNCEMENT_ANSWER',
+				'HELP_FAQ_FORMATTING_STICKIES_QUESTION' => 'HELP_FAQ_FORMATTING_STICKIES_ANSWER',
+				'HELP_FAQ_FORMATTING_LOCKED_QUESTION' => 'HELP_FAQ_FORMATTING_LOCKED_ANSWER',
+				'HELP_FAQ_FORMATTING_ICONS_QUESTION' => 'HELP_FAQ_FORMATTING_ICONS_ANSWER',
+			)
+		);
+		$this->manager->add_block(
+			'HELP_FAQ_BLOCK_GROUPS',
+			true,
+			array(
+				'HELP_FAQ_GROUPS_ADMINISTRATORS_QUESTION' => 'HELP_FAQ_GROUPS_ADMINISTRATORS_ANSWER',
+				'HELP_FAQ_GROUPS_MODERATORS_QUESTION' => 'HELP_FAQ_GROUPS_MODERATORS_ANSWER',
+				'HELP_FAQ_GROUPS_USERGROUPS_QUESTION' => 'HELP_FAQ_GROUPS_USERGROUPS_ANSWER',
+				'HELP_FAQ_GROUPS_USERGROUPS_JOIN_QUESTION' => 'HELP_FAQ_GROUPS_USERGROUPS_JOIN_ANSWER',
+				'HELP_FAQ_GROUPS_USERGROUPS_LEAD_QUESTION' => 'HELP_FAQ_GROUPS_USERGROUPS_LEAD_ANSWER',
+				'HELP_FAQ_GROUPS_COLORS_QUESTION' => 'HELP_FAQ_GROUPS_COLORS_ANSWER',
+				'HELP_FAQ_GROUPS_DEFAULT_QUESTION' => 'HELP_FAQ_GROUPS_DEFAULT_ANSWER',
+				'HELP_FAQ_GROUPS_TEAM_QUESTION' => 'HELP_FAQ_GROUPS_TEAM_ANSWER',
+			)
+		);
+		$this->manager->add_block(
+			'HELP_FAQ_BLOCK_PMS',
+			false,
+			array(
+				'HELP_FAQ_PMS_CANNOT_SEND_QUESTION' => 'HELP_FAQ_PMS_CANNOT_SEND_ANSWER',
+				'HELP_FAQ_PMS_UNWANTED_QUESTION' => 'HELP_FAQ_PMS_UNWANTED_ANSWER',
+				'HELP_FAQ_PMS_SPAM_QUESTION' => 'HELP_FAQ_PMS_SPAM_ANSWER',
+			)
+		);
+		$this->manager->add_block(
+			'HELP_FAQ_BLOCK_FRIENDS',
+			false,
+			array(
+				'HELP_FAQ_FRIENDS_BASIC_QUESTION' => 'HELP_FAQ_FRIENDS_BASIC_ANSWER',
+				'HELP_FAQ_FRIENDS_MANAGE_QUESTION' => 'HELP_FAQ_FRIENDS_MANAGE_ANSWER',
+			)
+		);
+		$this->manager->add_block(
+			'HELP_FAQ_BLOCK_SEARCH',
+			false,
+			array(
+				'HELP_FAQ_SEARCH_FORUM_QUESTION' => 'HELP_FAQ_SEARCH_FORUM_ANSWER',
+				'HELP_FAQ_SEARCH_NO_RESULT_QUESTION' => 'HELP_FAQ_SEARCH_NO_RESULT_ANSWER',
+				'HELP_FAQ_SEARCH_BLANK_QUESTION' => 'HELP_FAQ_SEARCH_BLANK_ANSWER',
+				'HELP_FAQ_SEARCH_MEMBERS_QUESTION' => 'HELP_FAQ_SEARCH_MEMBERS_ANSWER',
+				'HELP_FAQ_SEARCH_OWN_QUESTION' => 'HELP_FAQ_SEARCH_OWN_ANSWER',
+			)
+		);
+		$this->manager->add_block(
+			'HELP_FAQ_BLOCK_BOOKMARKS',
+			false,
+			array(
+				'HELP_FAQ_BOOKMARKS_DIFFERENCE_QUESTION' => 'HELP_FAQ_BOOKMARKS_DIFFERENCE_ANSWER',
+				'HELP_FAQ_BOOKMARKS_TOPIC_QUESTION' => 'HELP_FAQ_BOOKMARKS_TOPIC_ANSWER',
+				'HELP_FAQ_BOOKMARKS_FORUM_QUESTION' => 'HELP_FAQ_BOOKMARKS_FORUM_ANSWER',
+				'HELP_FAQ_BOOKMARKS_REMOVE_QUESTION' => 'HELP_FAQ_BOOKMARKS_REMOVE_ANSWER',
+			)
+		);
+		$this->manager->add_block(
+			'HELP_FAQ_BLOCK_ATTACHMENTS',
+			false,
+			array(
+				'HELP_FAQ_ATTACHMENTS_ALLOWED_QUESTION' => 'HELP_FAQ_ATTACHMENTS_ALLOWED_ANSWER',
+				'HELP_FAQ_ATTACHMENTS_OWN_QUESTION' => 'HELP_FAQ_ATTACHMENTS_OWN_ANSWER',
+			)
+		);
+		$this->manager->add_block(
+			'HELP_FAQ_BLOCK_ISSUES',
+			false,
+			array(
+				'HELP_FAQ_ISSUES_WHOIS_PHPBB_QUESTION' => 'HELP_FAQ_ISSUES_WHOIS_PHPBB_ANSWER',
+				'HELP_FAQ_ISSUES_FEATURE_QUESTION' => 'HELP_FAQ_ISSUES_FEATURE_ANSWER',
+				'HELP_FAQ_ISSUES_LEGAL_QUESTION' => 'HELP_FAQ_ISSUES_LEGAL_ANSWER',
+				'HELP_FAQ_ISSUES_ADMIN_QUESTION' => 'HELP_FAQ_ISSUES_ADMIN_ANSWER',
+			)
+		);
+
+		return $this->language->lang('FAQ_EXPLAIN');
+	}
+}
diff --git a/phpBB/phpbb/help/controller/help.php b/phpBB/phpbb/help/controller/help.php
new file mode 100644
index 0000000000..3bf6fe3098
--- /dev/null
+++ b/phpBB/phpbb/help/controller/help.php
@@ -0,0 +1,164 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\help\controller;
+
+use phpbb\exception\http_exception;
+
+class help
+{
+	/** @var \phpbb\controller\helper */
+	protected $helper;
+
+	/** @var \phpbb\event\dispatcher_interface  */
+	protected $dispatcher;
+
+	/** @var \phpbb\template\template */
+	protected $template;
+
+	/** @var \phpbb\user */
+	protected $user;
+
+	/** @var string */
+	protected $root_path;
+
+	/** @var string */
+	protected $php_ext;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\controller\helper	$helper
+	 * @param \phpbb\event\dispatcher_interface	$dispatcher
+	 * @param \phpbb\template\template	$template
+	 * @param \phpbb\user				$user
+	 * @param string					$root_path
+	 * @param string					$php_ext
+	 */
+	public function __construct(\phpbb\controller\helper $helper, \phpbb\event\dispatcher_interface $dispatcher, \phpbb\template\template $template, \phpbb\user $user, $root_path, $php_ext)
+	{
+		$this->helper = $helper;
+		$this->dispatcher = $dispatcher;
+		$this->template = $template;
+		$this->user = $user;
+		$this->root_path = $root_path;
+		$this->php_ext = $php_ext;
+	}
+
+	/**
+	 * Controller for /help/{mode} routes
+	 *
+	 * @param string		$mode
+	 * @return \Symfony\Component\HttpFoundation\Response A Symfony Response object
+	 * @throws http_exception when the $mode is not known by any extension
+	 */
+	public function handle($mode)
+	{
+		$template_file = 'faq_body.html';
+		switch ($mode)
+		{
+			case 'faq':
+			case 'bbcode':
+				$page_title = ($mode === 'faq') ? $this->user->lang['FAQ_EXPLAIN'] : $this->user->lang['BBCODE_GUIDE'];
+				$this->user->add_lang($mode, false, true);
+			break;
+
+			default:
+				$page_title = $this->user->lang['FAQ_EXPLAIN'];
+				$ext_name = $lang_file = '';
+
+				/**
+				 * You can use this event display a custom help page
+				 *
+				 * @event core.faq_mode_validation
+				 * @var	string	page_title		Title of the page
+				 * @var	string	mode			FAQ that is going to be displayed
+				 * @var	string	lang_file		Language file containing the help data
+				 * @var	string	ext_name		Vendor and extension name where the help
+				 *								language file can be loaded from
+				 * @var	string	template_file	Template file name
+				 * @since 3.1.4-RC1
+				 * @changed 3.1.11-RC1 Added template_file var
+				 */
+				$vars = array(
+					'page_title',
+					'mode',
+					'lang_file',
+					'ext_name',
+					'template_file',
+				);
+				extract($this->dispatcher->trigger_event('core.faq_mode_validation', compact($vars)));
+
+				if ($ext_name === '' || $lang_file === '')
+				{
+					throw new http_exception(404, 'Not Found');
+				}
+
+				$this->user->add_lang($lang_file, false, true, $ext_name);
+			break;
+
+		}
+
+		$this->template->assign_vars(array(
+			'L_FAQ_TITLE'				=> $page_title,
+			'S_IN_FAQ'					=> true,
+		));
+
+		$this->assign_to_template($this->user->help);
+
+		make_jumpbox(append_sid("{$this->root_path}viewforum.{$this->php_ext}"));
+		return $this->helper->render($template_file, $page_title);
+	}
+
+	/**
+	 * Assigns the help data to the template blocks
+	 *
+	 * @param array $help_data
+	 * @return null
+	 */
+	protected function assign_to_template(array $help_data)
+	{
+		// Pull the array data from the lang pack
+		$switch_column = $found_switch = false;
+		foreach ($help_data as $help_ary)
+		{
+			if ($help_ary[0] == '--')
+			{
+				if ($help_ary[1] == '--')
+				{
+					$switch_column = true;
+					$found_switch = true;
+					continue;
+				}
+
+				$this->template->assign_block_vars('faq_block', array(
+					'BLOCK_TITLE'		=> $help_ary[1],
+					'SWITCH_COLUMN'		=> $switch_column,
+				));
+
+				if ($switch_column)
+				{
+					$switch_column = false;
+				}
+				continue;
+			}
+
+			$this->template->assign_block_vars('faq_block.faq_row', array(
+				'FAQ_QUESTION'		=> $help_ary[0],
+				'FAQ_ANSWER'		=> $help_ary[1],
+			));
+		}
+
+		$this->template->assign_var('SWITCH_COLUMN_MANUALLY', !$found_switch);
+	}
+}
diff --git a/phpBB/phpbb/help/manager.php b/phpBB/phpbb/help/manager.php
new file mode 100644
index 0000000000..1637c58a61
--- /dev/null
+++ b/phpBB/phpbb/help/manager.php
@@ -0,0 +1,137 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\help;
+
+/**
+ * Class help page manager
+ */
+class manager
+{
+	/** @var \phpbb\event\dispatcher_interface */
+	protected $dispatcher;
+
+	/** @var \phpbb\language\language */
+	protected $language;
+
+	/** @var \phpbb\template\template */
+	protected $template;
+
+	/** @var bool */
+	protected $switched_column;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\event\dispatcher_interface $dispatcher
+	 * @param \phpbb\language\language $language
+	 * @param \phpbb\template\template $template
+	 */
+	public function __construct(\phpbb\event\dispatcher_interface $dispatcher, \phpbb\language\language $language, \phpbb\template\template $template)
+	{
+		$this->dispatcher = $dispatcher;
+		$this->language = $language;
+		$this->template = $template;
+	}
+
+	/**
+	 * Add a new faq block
+	 *
+	 * @param string $block_name	Name or language key with the name of the block
+	 * @param bool $switch_column	Switch the column of the menu
+	 * @param array $questions		Array of frequently asked questions
+	 */
+	public function add_block($block_name, $switch_column = false, $questions = array())
+	{
+		/**
+		 * You can use this event to add a block before the current one.
+		 *
+		 * @event core.help_manager_add_block_before
+		 * @var	string	block_name		Language key of the block headline
+		 * @var	bool	switch_column	Should we switch the menu column before this headline
+		 * @var	array	questions		Array with questions
+		 * @since 3.2.0-a1
+		 */
+		$vars = array('block_name', 'switch_column', 'questions');
+		extract($this->dispatcher->trigger_event('core.help_manager_add_block_before', compact($vars)));
+
+		$this->template->assign_block_vars('faq_block', array(
+			'BLOCK_TITLE'		=> $this->language->lang($block_name),
+			'SWITCH_COLUMN'		=> !$this->switched_column && $switch_column,
+		));
+
+		foreach ($questions as $question => $answer)
+		{
+			$this->add_question($question, $answer);
+		}
+
+		$this->switched_column = $this->switched_column || $switch_column;
+
+		/**
+		 * You can use this event to add a block after the current one.
+		 *
+		 * @event core.help_manager_add_block_after
+		 * @var	string	block_name		Language key of the block headline
+		 * @var	bool	switch_column	Should we switch the menu column before this headline
+		 * @var	array	questions		Array with questions
+		 * @since 3.2.0-a1
+		 */
+		$vars = array('block_name', 'switch_column', 'questions');
+		extract($this->dispatcher->trigger_event('core.help_manager_add_block_after', compact($vars)));
+	}
+
+	/**
+	 * Add a new faq question
+	 *
+	 * @param string $question	Question or language key with the question of the block
+	 * @param string $answer	Answer or language key with the answer of the block
+	 */
+	public function add_question($question, $answer)
+	{
+		/**
+		 * You can use this event to add a question before the current one.
+		 *
+		 * @event core.help_manager_add_question_before
+		 * @var	string	question	Language key of the question
+		 * @var	string	answer		Language key of the answer
+		 * @since 3.2.0-a1
+		 */
+		$vars = array('question', 'answer');
+		extract($this->dispatcher->trigger_event('core.help_manager_add_question_before', compact($vars)));
+
+		$this->template->assign_block_vars('faq_block.faq_row', array(
+			'FAQ_QUESTION'		=> $this->language->lang($question),
+			'FAQ_ANSWER'		=> $this->language->lang($answer),
+		));
+
+		/**
+		 * You can use this event to add a question after the current one.
+		 *
+		 * @event core.help_manager_add_question_after
+		 * @var	string	question	Language key of the question
+		 * @var	string	answer		Language key of the answer
+		 * @since 3.2.0-a1
+		 */
+		$vars = array('question', 'answer');
+		extract($this->dispatcher->trigger_event('core.help_manager_add_question_after', compact($vars)));
+	}
+
+	/**
+	 * Returns whether the block titles switched side
+	 * @return bool
+	 */
+	public function switched_column()
+	{
+		return $this->switched_column;
+	}
+}
diff --git a/phpBB/phpbb/hook/finder.php b/phpBB/phpbb/hook/finder.php
index a3d02d3aa0..f5a68a1370 100644
--- a/phpBB/phpbb/hook/finder.php
+++ b/phpBB/phpbb/hook/finder.php
@@ -18,8 +18,19 @@ namespace phpbb\hook;
 */
 class finder
 {
-	protected $phpbb_root_path;
+	/**
+	 * @var \phpbb\cache\driver\driver_interface
+	 */
 	protected $cache;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * @var string
+	 */
 	protected $php_ext;
 
 	/**
diff --git a/phpBB/phpbb/install/console/command/install/config/show.php b/phpBB/phpbb/install/console/command/install/config/show.php
new file mode 100644
index 0000000000..b6c11956fe
--- /dev/null
+++ b/phpBB/phpbb/install/console/command/install/config/show.php
@@ -0,0 +1,123 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\install\console\command\install\config;
+
+use phpbb\install\helper\iohandler\factory;
+use phpbb\install\installer_configuration;
+use phpbb\language\language;
+use Symfony\Component\Config\Definition\Exception\Exception;
+use Symfony\Component\Config\Definition\Processor;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
+use Symfony\Component\Yaml\Exception\ParseException;
+use Symfony\Component\Yaml\Yaml;
+
+class show extends \phpbb\console\command\command
+{
+	/**
+	 * @var factory
+	 */
+	protected $iohandler_factory;
+
+	/**
+	 * @var language
+	 */
+	protected $language;
+
+	/**
+	 * Constructor
+	 *
+	 * @param language $language
+	 * @param factory $factory
+	 */
+	public function __construct(language $language, factory $factory)
+	{
+		$this->iohandler_factory = $factory;
+		$this->language = $language;
+
+		parent::__construct(new \phpbb\user($language, 'datetime'));
+	}
+
+	/**
+	 *
+	 * {@inheritdoc}
+	 */
+	protected function configure()
+	{
+		$this
+			->setName('install:config:show')
+			->addArgument(
+				'config-file',
+				InputArgument::REQUIRED,
+				$this->language->lang('CLI_CONFIG_FILE'))
+			->setDescription($this->language->lang('CLI_INSTALL_SHOW_CONFIG'))
+		;
+	}
+
+	/**
+	 * Show the validated configuration
+	 *
+	 * @param InputInterface  $input  An InputInterface instance
+	 * @param OutputInterface $output An OutputInterface instance
+	 *
+	 * @return null
+	 */
+	protected function execute(InputInterface $input, OutputInterface $output)
+	{
+		$this->iohandler_factory->set_environment('cli');
+
+		/** @var \phpbb\install\helper\iohandler\cli_iohandler $iohandler */
+		$iohandler = $this->iohandler_factory->get();
+		$style = new SymfonyStyle($input, $output);
+		$iohandler->set_style($style, $output);
+
+		$config_file = $input->getArgument('config-file');
+
+		if (!is_file($config_file))
+		{
+			$iohandler->add_error_message(array('MISSING_FILE', $config_file));
+
+			return;
+		}
+
+		try
+		{
+			$config = Yaml::parse(file_get_contents($config_file), true, false);
+		}
+		catch (ParseException $e)
+		{
+			$iohandler->add_error_message('INVALID_YAML_FILE');
+
+			return;
+		}
+
+		$processor = new Processor();
+		$configuration = new installer_configuration();
+
+		try
+		{
+			$config = $processor->processConfiguration($configuration, $config);
+		}
+		catch (Exception $e)
+		{
+			$iohandler->add_error_message('INVALID_CONFIGURATION', $e->getMessage());
+
+			return;
+		}
+
+		$style->block(Yaml::dump(array('installer' => $config), 10, 4, true, false));
+	}
+}
diff --git a/phpBB/phpbb/install/console/command/install/config/validate.php b/phpBB/phpbb/install/console/command/install/config/validate.php
new file mode 100644
index 0000000000..b48a1acbd4
--- /dev/null
+++ b/phpBB/phpbb/install/console/command/install/config/validate.php
@@ -0,0 +1,124 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\install\console\command\install\config;
+
+use phpbb\install\helper\iohandler\factory;
+use phpbb\install\installer_configuration;
+use phpbb\language\language;
+use Symfony\Component\Config\Definition\Exception\Exception;
+use Symfony\Component\Config\Definition\Processor;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
+use Symfony\Component\Yaml\Exception\ParseException;
+use Symfony\Component\Yaml\Yaml;
+
+class validate extends \phpbb\console\command\command
+{
+	/**
+	 * @var factory
+	 */
+	protected $iohandler_factory;
+
+	/**
+	 * @var language
+	 */
+	protected $language;
+
+	/**
+	 * Constructor
+	 *
+	 * @param language $language
+	 * @param factory $factory
+	 */
+	public function __construct(language $language, factory $factory)
+	{
+		$this->iohandler_factory = $factory;
+		$this->language = $language;
+
+		parent::__construct(new \phpbb\user($language, 'datetime'));
+	}
+
+	/**
+	 *
+	 * {@inheritdoc}
+	 */
+	protected function configure()
+	{
+		$this
+			->setName('install:config:validate')
+			->addArgument(
+				'config-file',
+				InputArgument::REQUIRED,
+				$this->language->lang('CLI_CONFIG_FILE'))
+			->setDescription($this->language->lang('CLI_INSTALL_VALIDATE_CONFIG'))
+		;
+	}
+
+	/**
+	 * Validate the configuration file
+	 *
+	 * @param InputInterface  $input  An InputInterface instance
+	 * @param OutputInterface $output An OutputInterface instance
+	 *
+	 * @return null
+	 */
+	protected function execute(InputInterface $input, OutputInterface $output)
+	{
+		$this->iohandler_factory->set_environment('cli');
+
+		/** @var \phpbb\install\helper\iohandler\cli_iohandler $iohandler */
+		$iohandler = $this->iohandler_factory->get();
+		$style = new SymfonyStyle($input, $output);
+		$iohandler->set_style($style, $output);
+
+		$config_file = $input->getArgument('config-file');
+
+		if (!is_file($config_file))
+		{
+			$iohandler->add_error_message(array('MISSING_FILE', array($config_file)));
+
+			return 1;
+		}
+
+		try
+		{
+			$config = Yaml::parse(file_get_contents($config_file), true, false);
+		}
+		catch (ParseException $e)
+		{
+			$iohandler->add_error_message('INVALID_YAML_FILE');
+
+			return 1;
+		}
+
+		$processor = new Processor();
+		$configuration = new installer_configuration();
+
+		try
+		{
+			$processor->processConfiguration($configuration, $config);
+		}
+		catch (Exception $e)
+		{
+			$iohandler->add_error_message('INVALID_CONFIGURATION', $e->getMessage());
+
+			return 1;
+		}
+
+		$iohandler->add_success_message('CONFIGURATION_VALID');
+		return 0;
+	}
+}
diff --git a/phpBB/phpbb/install/console/command/install/install.php b/phpBB/phpbb/install/console/command/install/install.php
new file mode 100644
index 0000000000..52a348fe44
--- /dev/null
+++ b/phpBB/phpbb/install/console/command/install/install.php
@@ -0,0 +1,210 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\install\console\command\install;
+
+use phpbb\install\exception\installer_exception;
+use phpbb\install\helper\install_helper;
+use phpbb\install\helper\iohandler\cli_iohandler;
+use phpbb\install\helper\iohandler\factory;
+use phpbb\install\installer;
+use phpbb\install\installer_configuration;
+use phpbb\language\language;
+use Symfony\Component\Config\Definition\Exception\Exception;
+use Symfony\Component\Config\Definition\Processor;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
+use Symfony\Component\Yaml\Exception\ParseException;
+use Symfony\Component\Yaml\Yaml;
+
+class install extends \phpbb\console\command\command
+{
+	/**
+	 * @var factory
+	 */
+	protected $iohandler_factory;
+
+	/**
+	 * @var installer
+	 */
+	protected $installer;
+
+	/**
+	 * @var install_helper
+	 */
+	protected $install_helper;
+
+	/**
+	 * @var language
+	 */
+	protected $language;
+
+	/**
+	 * Constructor
+	 *
+	 * @param language			$language
+	 * @param factory			$factory
+	 * @param installer			$installer
+	 * @param install_helper	$install_helper
+	 */
+	public function __construct(language $language, factory $factory, installer $installer, install_helper $install_helper)
+	{
+		$this->iohandler_factory = $factory;
+		$this->installer = $installer;
+		$this->language = $language;
+		$this->install_helper = $install_helper;
+
+		parent::__construct(new \phpbb\user($language, 'datetime'));
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	protected function configure()
+	{
+		$this
+			->setName('install')
+			->addArgument(
+				'config-file',
+				InputArgument::REQUIRED,
+				$this->language->lang('CLI_CONFIG_FILE'))
+			->setDescription($this->language->lang('CLI_INSTALL_BOARD'))
+		;
+	}
+
+	/**
+	 * Executes the command install.
+	 *
+	 * Install the board
+	 *
+	 * @param InputInterface  $input  An InputInterface instance
+	 * @param OutputInterface $output An OutputInterface instance
+	 *
+	 * @return null
+	 */
+	protected function execute(InputInterface $input, OutputInterface $output)
+	{
+		$this->iohandler_factory->set_environment('cli');
+
+		/** @var \phpbb\install\helper\iohandler\cli_iohandler $iohandler */
+		$iohandler = $this->iohandler_factory->get();
+		$style = new SymfonyStyle($input, $output);
+		$iohandler->set_style($style, $output);
+
+		$this->installer->set_iohandler($iohandler);
+
+		$config_file = $input->getArgument('config-file');
+
+		if ($this->install_helper->is_phpbb_installed())
+		{
+			$iohandler->add_error_message('INSTALL_PHPBB_INSTALLED');
+
+			return 1;
+		}
+
+		if (!is_file($config_file))
+		{
+			$iohandler->add_error_message(array('MISSING_FILE', $config_file));
+
+			return 1;
+		}
+
+		try
+		{
+			$config = Yaml::parse(file_get_contents($config_file), true, false);
+		}
+		catch (ParseException $e)
+		{
+			$iohandler->add_error_message(array('INVALID_YAML_FILE', $config_file));
+
+			return 1;
+		}
+
+		$processor = new Processor();
+		$configuration = new installer_configuration();
+
+		try
+		{
+			$config = $processor->processConfiguration($configuration, $config);
+		}
+		catch (Exception $e)
+		{
+			$iohandler->add_error_message('INVALID_CONFIGURATION', $e->getMessage());
+
+			return 1;
+		}
+
+		$this->register_configuration($iohandler, $config);
+
+		try
+		{
+			$this->installer->run();
+			return 0;
+		}
+		catch (installer_exception $e)
+		{
+			$iohandler->add_error_message($e->getMessage());
+			return 1;
+		}
+	}
+
+	/**
+	 * Register the configuration to simulate the forms.
+	 *
+	 * @param cli_iohandler $iohandler
+	 * @param array $config
+	 */
+	private function register_configuration(cli_iohandler $iohandler, $config)
+	{
+		$iohandler->set_input('admin_name', $config['admin']['name']);
+		$iohandler->set_input('admin_pass1', $config['admin']['password']);
+		$iohandler->set_input('admin_pass2', $config['admin']['password']);
+		$iohandler->set_input('board_email', $config['admin']['email']);
+		$iohandler->set_input('submit_admin', 'submit');
+
+		$iohandler->set_input('default_lang', $config['board']['lang']);
+		$iohandler->set_input('board_name', $config['board']['name']);
+		$iohandler->set_input('board_description', $config['board']['description']);
+		$iohandler->set_input('submit_board', 'submit');
+
+		$iohandler->set_input('dbms', $config['database']['dbms']);
+		$iohandler->set_input('dbhost', $config['database']['dbhost']);
+		$iohandler->set_input('dbport', $config['database']['dbport']);
+		$iohandler->set_input('dbuser', $config['database']['dbuser']);
+		$iohandler->set_input('dbpasswd', $config['database']['dbpasswd']);
+		$iohandler->set_input('dbname', $config['database']['dbname']);
+		$iohandler->set_input('table_prefix', $config['database']['table_prefix']);
+		$iohandler->set_input('submit_database', 'submit');
+
+		$iohandler->set_input('email_enable', $config['email']['enabled']);
+		$iohandler->set_input('smtp_delivery', $config['email']['smtp_delivery']);
+		$iohandler->set_input('smtp_host', $config['email']['smtp_host']);
+		$iohandler->set_input('smtp_port', $config['email']['smtp_port']);
+		$iohandler->set_input('smtp_auth', $config['email']['smtp_auth']);
+		$iohandler->set_input('smtp_user', $config['email']['smtp_user']);
+		$iohandler->set_input('smtp_pass', $config['email']['smtp_pass']);
+		$iohandler->set_input('submit_email', 'submit');
+
+		$iohandler->set_input('cookie_secure', $config['server']['cookie_secure']);
+		$iohandler->set_input('server_protocol', $config['server']['server_protocol']);
+		$iohandler->set_input('force_server_vars', $config['server']['force_server_vars']);
+		$iohandler->set_input('server_name', $config['server']['server_name']);
+		$iohandler->set_input('server_port', $config['server']['server_port']);
+		$iohandler->set_input('script_path', $config['server']['script_path']);
+		$iohandler->set_input('submit_server', 'submit');
+
+		$iohandler->set_input('install-extensions', $config['extensions']);
+	}
+}
diff --git a/phpBB/phpbb/install/console/command/update/config/show.php b/phpBB/phpbb/install/console/command/update/config/show.php
new file mode 100644
index 0000000000..e462763b5d
--- /dev/null
+++ b/phpBB/phpbb/install/console/command/update/config/show.php
@@ -0,0 +1,123 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\install\console\command\update\config;
+
+use phpbb\install\helper\iohandler\factory;
+use phpbb\install\updater_configuration;
+use phpbb\language\language;
+use Symfony\Component\Config\Definition\Exception\Exception;
+use Symfony\Component\Config\Definition\Processor;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
+use Symfony\Component\Yaml\Exception\ParseException;
+use Symfony\Component\Yaml\Yaml;
+
+class show extends \phpbb\console\command\command
+{
+	/**
+	 * @var factory
+	 */
+	protected $iohandler_factory;
+
+	/**
+	 * @var language
+	 */
+	protected $language;
+
+	/**
+	 * Constructor
+	 *
+	 * @param language $language
+	 * @param factory $factory
+	 */
+	public function __construct(language $language, factory $factory)
+	{
+		$this->iohandler_factory = $factory;
+		$this->language = $language;
+
+		parent::__construct(new \phpbb\user($language, 'datetime'));
+	}
+
+	/**
+	 *
+	 * {@inheritdoc}
+	 */
+	protected function configure()
+	{
+		$this
+			->setName('update:config:show')
+			->addArgument(
+				'config-file',
+				InputArgument::REQUIRED,
+				$this->language->lang('CLI_CONFIG_FILE'))
+			->setDescription($this->language->lang('CLI_INSTALL_SHOW_CONFIG'))
+		;
+	}
+
+	/**
+	 * Show the validated configuration
+	 *
+	 * @param InputInterface  $input  An InputInterface instance
+	 * @param OutputInterface $output An OutputInterface instance
+	 *
+	 * @return null
+	 */
+	protected function execute(InputInterface $input, OutputInterface $output)
+	{
+		$this->iohandler_factory->set_environment('cli');
+
+		/** @var \phpbb\install\helper\iohandler\cli_iohandler $iohandler */
+		$iohandler = $this->iohandler_factory->get();
+		$style = new SymfonyStyle($input, $output);
+		$iohandler->set_style($style, $output);
+
+		$config_file = $input->getArgument('config-file');
+
+		if (!is_file($config_file))
+		{
+			$iohandler->add_error_message(array('MISSING_FILE', $config_file));
+
+			return;
+		}
+
+		try
+		{
+			$config = Yaml::parse(file_get_contents($config_file), true, false);
+		}
+		catch (ParseException $e)
+		{
+			$iohandler->add_error_message('INVALID_YAML_FILE');
+
+			return;
+		}
+
+		$processor = new Processor();
+		$configuration = new updater_configuration();
+
+		try
+		{
+			$config = $processor->processConfiguration($configuration, $config);
+		}
+		catch (Exception $e)
+		{
+			$iohandler->add_error_message('INVALID_CONFIGURATION', $e->getMessage());
+
+			return;
+		}
+
+		$style->block(Yaml::dump(array('updater' => $config), 10, 4, true, false));
+	}
+}
diff --git a/phpBB/phpbb/install/console/command/update/config/validate.php b/phpBB/phpbb/install/console/command/update/config/validate.php
new file mode 100644
index 0000000000..18de5eab46
--- /dev/null
+++ b/phpBB/phpbb/install/console/command/update/config/validate.php
@@ -0,0 +1,124 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\install\console\command\update\config;
+
+use phpbb\install\helper\iohandler\factory;
+use phpbb\install\updater_configuration;
+use phpbb\language\language;
+use Symfony\Component\Config\Definition\Exception\Exception;
+use Symfony\Component\Config\Definition\Processor;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
+use Symfony\Component\Yaml\Exception\ParseException;
+use Symfony\Component\Yaml\Yaml;
+
+class validate extends \phpbb\console\command\command
+{
+	/**
+	 * @var factory
+	 */
+	protected $iohandler_factory;
+
+	/**
+	 * @var language
+	 */
+	protected $language;
+
+	/**
+	 * Constructor
+	 *
+	 * @param language $language
+	 * @param factory $factory
+	 */
+	public function __construct(language $language, factory $factory)
+	{
+		$this->iohandler_factory = $factory;
+		$this->language = $language;
+
+		parent::__construct(new \phpbb\user($language, 'datetime'));
+	}
+
+	/**
+	 *
+	 * {@inheritdoc}
+	 */
+	protected function configure()
+	{
+		$this
+			->setName('update:config:validate')
+			->addArgument(
+				'config-file',
+				InputArgument::REQUIRED,
+				$this->language->lang('CLI_CONFIG_FILE'))
+			->setDescription($this->language->lang('CLI_INSTALL_VALIDATE_CONFIG'))
+		;
+	}
+
+	/**
+	 * Validate the configuration file
+	 *
+	 * @param InputInterface  $input  An InputInterface instance
+	 * @param OutputInterface $output An OutputInterface instance
+	 *
+	 * @return null
+	 */
+	protected function execute(InputInterface $input, OutputInterface $output)
+	{
+		$this->iohandler_factory->set_environment('cli');
+
+		/** @var \phpbb\install\helper\iohandler\cli_iohandler $iohandler */
+		$iohandler = $this->iohandler_factory->get();
+		$style = new SymfonyStyle($input, $output);
+		$iohandler->set_style($style, $output);
+
+		$config_file = $input->getArgument('config-file');
+
+		if (!is_file($config_file))
+		{
+			$iohandler->add_error_message(array('MISSING_FILE', array($config_file)));
+
+			return 1;
+		}
+
+		try
+		{
+			$config = Yaml::parse(file_get_contents($config_file), true, false);
+		}
+		catch (ParseException $e)
+		{
+			$iohandler->add_error_message('INVALID_YAML_FILE');
+
+			return 1;
+		}
+
+		$processor = new Processor();
+		$configuration = new updater_configuration();
+
+		try
+		{
+			$processor->processConfiguration($configuration, $config);
+		}
+		catch (Exception $e)
+		{
+			$iohandler->add_error_message('INVALID_CONFIGURATION', $e->getMessage());
+
+			return 1;
+		}
+
+		$iohandler->add_success_message('CONFIGURATION_VALID');
+		return 0;
+	}
+}
diff --git a/phpBB/phpbb/install/console/command/update/update.php b/phpBB/phpbb/install/console/command/update/update.php
new file mode 100644
index 0000000000..e827761d1c
--- /dev/null
+++ b/phpBB/phpbb/install/console/command/update/update.php
@@ -0,0 +1,182 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\install\console\command\update;
+
+use phpbb\install\exception\installer_exception;
+use phpbb\install\helper\install_helper;
+use phpbb\install\helper\iohandler\cli_iohandler;
+use phpbb\install\helper\iohandler\factory;
+use phpbb\install\installer;
+use phpbb\install\updater_configuration;
+use phpbb\language\language;
+use Symfony\Component\Config\Definition\Exception\Exception;
+use Symfony\Component\Config\Definition\Processor;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
+use Symfony\Component\Yaml\Exception\ParseException;
+use Symfony\Component\Yaml\Yaml;
+
+class update extends \phpbb\console\command\command
+{
+	/**
+	 * @var factory
+	 */
+	protected $iohandler_factory;
+
+	/**
+	 * @var installer
+	 */
+	protected $installer;
+
+	/**
+	 * @var install_helper
+	 */
+	protected $install_helper;
+
+	/**
+	 * @var language
+	 */
+	protected $language;
+
+	/**
+	 * Constructor
+	 *
+	 * @param language			$language
+	 * @param factory			$factory
+	 * @param installer			$installer
+	 * @param install_helper	$install_helper
+	 */
+	public function __construct(language $language, factory $factory, installer $installer, install_helper $install_helper)
+	{
+		$this->iohandler_factory = $factory;
+		$this->installer = $installer;
+		$this->language = $language;
+		$this->install_helper = $install_helper;
+
+		parent::__construct(new \phpbb\user($language, 'datetime'));
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	protected function configure()
+	{
+		$this
+			->setName('update')
+			->addArgument(
+				'config-file',
+				InputArgument::REQUIRED,
+				$this->language->lang('CLI_CONFIG_FILE'))
+			->setDescription($this->language->lang('CLI_UPDATE_BOARD'))
+		;
+	}
+
+	/**
+	 * Executes the command update.
+	 *
+	 * Update the board
+	 *
+	 * @param InputInterface  $input  An InputInterface instance
+	 * @param OutputInterface $output An OutputInterface instance
+	 *
+	 * @return int
+	 */
+	protected function execute(InputInterface $input, OutputInterface $output)
+	{
+		$this->iohandler_factory->set_environment('cli');
+
+		/** @var \phpbb\install\helper\iohandler\cli_iohandler $iohandler */
+		$iohandler = $this->iohandler_factory->get();
+		$style = new SymfonyStyle($input, $output);
+		$iohandler->set_style($style, $output);
+
+		$this->installer->set_iohandler($iohandler);
+
+		$config_file = $input->getArgument('config-file');
+
+		if (!$this->install_helper->is_phpbb_installed())
+		{
+			$iohandler->add_error_message('INSTALL_PHPBB_NOT_INSTALLED');
+
+			return 1;
+		}
+
+		if (!is_file($config_file))
+		{
+			$iohandler->add_error_message(array('MISSING_FILE', $config_file));
+
+			return 1;
+		}
+
+		try
+		{
+			$config = Yaml::parse(file_get_contents($config_file), true, false);
+		}
+		catch (ParseException $e)
+		{
+			$iohandler->add_error_message(array('INVALID_YAML_FILE', $config_file));
+
+			return 1;
+		}
+
+		$processor = new Processor();
+		$configuration = new updater_configuration();
+
+		try
+		{
+			$config = $processor->processConfiguration($configuration, $config);
+		}
+		catch (Exception $e)
+		{
+			$iohandler->add_error_message('INVALID_CONFIGURATION', $e->getMessage());
+
+			return 1;
+		}
+
+		$this->register_configuration($iohandler, $config);
+
+		try
+		{
+			$this->installer->run();
+			return 0;
+		}
+		catch (installer_exception $e)
+		{
+			$iohandler->add_error_message($e->getMessage());
+			return 1;
+		}
+	}
+
+	/**
+	 * Register the configuration to simulate the forms.
+	 *
+	 * @param cli_iohandler $iohandler
+	 * @param array $config
+	 */
+	private function register_configuration(cli_iohandler $iohandler, $config)
+	{
+		$iohandler->set_input('update_type', $config['type']);
+		$iohandler->set_input('submit_update', 'submit');
+
+		$iohandler->set_input('compression_method', '.tar');
+		$iohandler->set_input('method', 'direct_file');
+		$iohandler->set_input('submit_update_file', 'submit');
+
+		$iohandler->set_input('submit_continue_file_update', 'submit');
+
+		$iohandler->set_input('update-extensions', $config['extensions']);
+	}
+}
diff --git a/phpBB/phpbb/install/controller/archive_download.php b/phpBB/phpbb/install/controller/archive_download.php
new file mode 100644
index 0000000000..eabc0a9976
--- /dev/null
+++ b/phpBB/phpbb/install/controller/archive_download.php
@@ -0,0 +1,93 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\controller;
+
+use phpbb\exception\http_exception;
+use phpbb\install\helper\config;
+use Symfony\Component\HttpFoundation\BinaryFileResponse;
+use Symfony\Component\HttpFoundation\ResponseHeaderBag;
+
+class archive_download
+{
+	/**
+	 * @var config
+	 */
+	protected $installer_config;
+
+	/**
+	 * Constructor
+	 *
+	 * @param config $config
+	 */
+	public function __construct(config $config)
+	{
+		$this->installer_config = $config;
+		$this->installer_config->load_config();
+	}
+
+	/**
+	 * Sends response with the merge conflict archive
+	 *
+	 * Merge conflicts always have to be resolved manually,
+	 * so we use a different archive for that.
+	 *
+	 * @return BinaryFileResponse
+	 */
+	public function conflict_archive()
+	{
+		$filename = $this->installer_config->get('update_file_conflict_archive', '');
+
+		if (empty($filename))
+		{
+			throw new http_exception(404, 'URL_NOT_FOUND');
+		}
+
+		return $this->send_response($filename);
+	}
+
+	/**
+	 * Sends response with the updated files' archive
+	 *
+	 * @return BinaryFileResponse
+	 */
+	public function update_archive()
+	{
+		$filename = $this->installer_config->get('update_file_archive', '');
+
+		if (empty($filename))
+		{
+			throw new http_exception(404, 'URL_NOT_FOUND');
+		}
+
+		return $this->send_response($filename);
+	}
+
+	/**
+	 * Generates a download response
+	 *
+	 * @param string	$filename	Path to the file to download
+	 *
+	 * @return BinaryFileResponse	Response object
+	 */
+	private function send_response($filename)
+	{
+		$response = new BinaryFileResponse($filename);
+		$response->setContentDisposition(
+			ResponseHeaderBag::DISPOSITION_ATTACHMENT,
+			basename($filename)
+		);
+
+		return $response;
+	}
+}
diff --git a/phpBB/phpbb/install/controller/helper.php b/phpBB/phpbb/install/controller/helper.php
new file mode 100644
index 0000000000..ff7e691224
--- /dev/null
+++ b/phpBB/phpbb/install/controller/helper.php
@@ -0,0 +1,413 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\controller;
+
+use phpbb\install\helper\config;
+use phpbb\install\helper\navigation\navigation_provider;
+use phpbb\language\language;
+use phpbb\language\language_file_helper;
+use phpbb\path_helper;
+use phpbb\request\request;
+use phpbb\request\request_interface;
+use phpbb\routing\router;
+use phpbb\symfony_request;
+use phpbb\template\template;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\HttpFoundation\Cookie;
+
+/**
+ * A duplicate of \phpbb\controller\helper
+ *
+ * This class is necessary because of controller\helper's legacy function calls
+ * to page_header() page_footer() functions which has unavailable dependencies.
+ */
+class helper
+{
+	/**
+	 * @var config
+	 */
+	protected $installer_config;
+
+	/**
+	 * @var \phpbb\language\language
+	 */
+	protected $language;
+
+	/**
+	 * @var bool|string
+	 */
+	protected $language_cookie;
+
+	/**
+	 * @var \phpbb\language\language_file_helper
+	 */
+	protected $lang_helper;
+
+	/**
+	 * @var \phpbb\install\helper\navigation\navigation_provider
+	 */
+	protected $navigation_provider;
+
+	/**
+	 * @var \phpbb\template\template
+	 */
+	protected $template;
+
+	/**
+	 * @var \phpbb\path_helper
+	 */
+	protected $path_helper;
+
+	/**
+	 * @var \phpbb\request\request
+	 */
+	protected $phpbb_request;
+
+	/**
+	 * @var \phpbb\symfony_request
+	 */
+	protected $request;
+
+	/**
+	 * @var \phpbb\routing\router
+	 */
+	protected $router;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_admin_path;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * Constructor
+	 *
+	 * @param config				$config
+	 * @param language				$language
+	 * @param language_file_helper	$lang_helper
+	 * @param navigation_provider	$nav
+	 * @param template				$template
+	 * @param path_helper			$path_helper
+	 * @param request				$phpbb_request
+	 * @param symfony_request		$request
+	 * @param router				$router
+	 * @param string				$phpbb_root_path
+	 */
+	public function __construct(config $config, language $language, language_file_helper $lang_helper, navigation_provider $nav, template $template, path_helper $path_helper, request $phpbb_request, symfony_request $request, router $router, $phpbb_root_path)
+	{
+		$this->installer_config = $config;
+		$this->language = $language;
+		$this->language_cookie = false;
+		$this->lang_helper = $lang_helper;
+		$this->navigation_provider = $nav;
+		$this->template = $template;
+		$this->path_helper = $path_helper;
+		$this->phpbb_request = $phpbb_request;
+		$this->request = $request;
+		$this->router = $router;
+		$this->phpbb_root_path = $phpbb_root_path;
+		$this->phpbb_admin_path = $phpbb_root_path . 'adm/';
+	}
+
+	/**
+	 * Automate setting up the page and creating the response object.
+	 *
+	 * @param string	$template_file		The template handle to render
+	 * @param string	$page_title			The title of the page to output
+	 * @param bool		$selected_language	True to enable language selector it, false otherwise
+	 * @param int		$status_code		The status code to be sent to the page header
+	 *
+	 * @return Response object containing rendered page
+	 */
+	public function render($template_file, $page_title = '', $selected_language = false, $status_code = 200)
+	{
+		$this->page_header($page_title, $selected_language);
+
+		$this->template->set_filenames(array(
+			'body'	=> $template_file,
+		));
+
+		$response = new Response($this->template->assign_display('body'), $status_code);
+
+		// Set language cookie
+		if ($this->language_cookie !== false)
+		{
+			$cookie = new Cookie('lang', $this->language_cookie, time() + 3600);
+			$response->headers->setCookie($cookie);
+
+			$this->language_cookie = false;
+		}
+
+		return $response;
+	}
+
+	/**
+	 * Returns path from route name
+	 *
+	 * @param string	$route_name
+	 * @param array		$parameters
+	 *
+	 * @return string
+	 */
+	public function route($route_name, $parameters = array())
+	{
+		$url = $this->router->generate($route_name, $parameters);
+
+		return $url;
+	}
+
+	/**
+	 * Handles language selector form
+	 */
+	public function handle_language_select()
+	{
+		$lang = null;
+
+		// Check if language form has been submited
+		$submit = $this->phpbb_request->variable('change_lang', '');
+		if (!empty($submit))
+		{
+			$lang = $this->phpbb_request->variable('language', '');
+		}
+
+		// Retrieve language from cookie
+		$lang_cookie = $this->phpbb_request->variable('lang', '', false, request_interface::COOKIE);
+		if (empty($lang) && !empty($lang_cookie))
+		{
+			$lang = $lang_cookie;
+		}
+
+		$lang = (!empty($lang) && strpos($lang, '/') === false) ? $lang : null;
+		$this->language_cookie = $lang;
+
+		$this->render_language_select($lang);
+
+		if ($lang !== null)
+		{
+			$this->language->set_user_language($lang, true);
+			$this->installer_config->set('user_language', $lang);
+		}
+	}
+
+	/**
+	 * Process navigation data to reflect active/completed stages
+	 *
+	 * @param \phpbb\install\helper\iohandler\iohandler_interface|null	$iohandler
+	 */
+	public function handle_navigation($iohandler = null)
+	{
+		$nav_data = $this->installer_config->get_navigation_data();
+
+		// Set active navigation stage
+		if (isset($nav_data['active']) && is_array($nav_data['active']))
+		{
+			if ($iohandler !== null)
+			{
+				$iohandler->set_active_stage_menu($nav_data['active']);
+			}
+
+			$this->navigation_provider->set_nav_property($nav_data['active'], array(
+				'selected'	=> true,
+				'completed'	=> false,
+			));
+		}
+
+		// Set finished navigation stages
+		if (isset($nav_data['finished']) && is_array($nav_data['finished']))
+		{
+			foreach ($nav_data['finished'] as $finished_stage)
+			{
+				if ($iohandler !== null)
+				{
+					$iohandler->set_finished_stage_menu($finished_stage);
+				}
+
+				$this->navigation_provider->set_nav_property($finished_stage, array(
+					'selected'	=> false,
+					'completed'	=> true,
+				));
+			}
+		}
+	}
+
+	/**
+	 * Set default template variables
+	 *
+	 * @param string	$page_title			Title of the page
+	 * @param bool		$selected_language	True to enable language selector it, false otherwise
+	 */
+	protected function page_header($page_title, $selected_language = false)
+	{
+		// Path to templates
+		$paths = array($this->phpbb_root_path . 'install/update/new/adm/', $this->phpbb_admin_path);
+		$paths = array_filter($paths, 'is_dir');
+		$path = array_shift($paths);
+		$path = substr($path, strlen($this->phpbb_root_path));
+
+		$this->template->assign_vars(array(
+			'L_CHANGE'				=> $this->language->lang('CHANGE'),
+			'L_COLON'				=> $this->language->lang('COLON'),
+			'L_INSTALL_PANEL'		=> $this->language->lang('INSTALL_PANEL'),
+			'L_SELECT_LANG'			=> $this->language->lang('SELECT_LANG'),
+			'L_SKIP'				=> $this->language->lang('SKIP'),
+			'PAGE_TITLE'			=> $this->language->lang($page_title),
+			'T_IMAGE_PATH'			=> $this->path_helper->get_web_root_path() . $path . 'images',
+			'T_JQUERY_LINK'			=> $this->path_helper->get_web_root_path() . $path . '../assets/javascript/jquery.min.js',
+			'T_TEMPLATE_PATH'		=> $this->path_helper->get_web_root_path() . $path . 'style',
+			'T_ASSETS_PATH'			=> $this->path_helper->get_web_root_path() . $path . '../assets',
+
+			'S_CONTENT_DIRECTION' 	=> $this->language->lang('DIRECTION'),
+			'S_CONTENT_FLOW_BEGIN'	=> ($this->language->lang('DIRECTION') === 'ltr') ? 'left' : 'right',
+			'S_CONTENT_FLOW_END'	=> ($this->language->lang('DIRECTION') === 'ltr') ? 'right' : 'left',
+			'S_CONTENT_ENCODING' 	=> 'UTF-8',
+			'S_LANG_SELECT'			=> $selected_language,
+
+			'S_USER_LANG'			=> $this->language->lang('USER_LANG'),
+		));
+
+		$this->render_navigation();
+	}
+
+	/**
+	 * Render navigation
+	 */
+	protected function render_navigation()
+	{
+		// Get navigation items
+		$nav_array = $this->navigation_provider->get();
+		$nav_array = $this->sort_navigation_level($nav_array);
+
+		$active_main_menu = $this->get_active_main_menu($nav_array);
+
+		// Pass navigation to template
+		foreach ($nav_array as $key => $entry)
+		{
+			$this->template->assign_block_vars('t_block1', array(
+				'L_TITLE' => $this->language->lang($entry['label']),
+				'S_SELECTED' => ($active_main_menu === $key),
+				'U_TITLE' => $this->route($entry['route']),
+			));
+
+			if (is_array($entry[0]) && $active_main_menu === $key)
+			{
+				$entry[0] = $this->sort_navigation_level($entry[0]);
+
+				foreach ($entry[0] as $name => $sub_entry)
+				{
+					if (isset($sub_entry['stage']) && $sub_entry['stage'] === true)
+					{
+						$this->template->assign_block_vars('l_block2', array(
+							'L_TITLE' => $this->language->lang($sub_entry['label']),
+							'S_SELECTED' => (isset($sub_entry['selected']) && $sub_entry['selected'] === true),
+							'S_COMPLETE' => (isset($sub_entry['completed']) && $sub_entry['completed'] === true),
+							'STAGE_NAME' => $name,
+						));
+					}
+					else
+					{
+						$this->template->assign_block_vars('l_block1', array(
+							'L_TITLE' => $this->language->lang($sub_entry['label']),
+							'S_SELECTED' => (isset($sub_entry['route']) && $sub_entry['route'] === $this->request->get('_route')),
+							'U_TITLE' => $this->route($sub_entry['route']),
+						));
+					}
+				}
+			}
+		}
+	}
+
+	/**
+	 * Render language select form
+	 *
+	 * @param string	$selected_language
+	 */
+	protected function render_language_select($selected_language = null)
+	{
+		$langs = $this->lang_helper->get_available_languages();
+		foreach ($langs as $lang)
+		{
+			$this->template->assign_block_vars('language_select_item', array(
+				'VALUE' => $lang['iso'],
+				'NAME' => $lang['local_name'],
+				'SELECTED' => ($lang['iso'] === $selected_language),
+			));
+		}
+	}
+
+	/**
+	 * Returns the name of the active main menu item
+	 *
+	 * @param array	$nav_array
+	 *
+	 * @return string|bool	Returns the name of the active main menu element, if the element not found, returns false
+	 */
+	protected function get_active_main_menu($nav_array)
+	{
+		$active_route = $this->request->get('_route');
+
+		foreach ($nav_array as $nav_name => $nav_options)
+		{
+			$current_menu = $nav_name;
+
+			if (isset($nav_options['route']) && $nav_options['route'] === $active_route)
+			{
+				return $nav_name;
+			}
+
+			if (is_array($nav_options[0]))
+			{
+				foreach ($nav_options[0] as $sub_menus)
+				{
+					if (isset($sub_menus['route']) && $sub_menus['route'] === $active_route)
+					{
+						return $current_menu;
+					}
+				}
+			}
+		}
+
+		return false;
+	}
+
+	/**
+	 * Sorts the top level of navigation array
+	 *
+	 * @param array	$nav_array	Navigation array
+	 *
+	 * @return array
+	 */
+	protected function sort_navigation_level($nav_array)
+	{
+		$sorted = array();
+		foreach ($nav_array as $key => $nav)
+		{
+			$order = (isset($nav['order'])) ? $nav['order'] : 0;
+			$sorted[$order][$key] = $nav;
+		}
+
+		// Linearization of navigation array
+		$nav_array = array();
+		ksort($sorted);
+		foreach ($sorted as $nav)
+		{
+			$nav_array = array_merge($nav_array, $nav);
+		}
+
+		return $nav_array;
+	}
+}
diff --git a/phpBB/phpbb/install/controller/install.php b/phpBB/phpbb/install/controller/install.php
new file mode 100644
index 0000000000..92506872a3
--- /dev/null
+++ b/phpBB/phpbb/install/controller/install.php
@@ -0,0 +1,172 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\controller;
+
+use phpbb\exception\http_exception;
+use phpbb\install\helper\install_helper;
+use phpbb\install\helper\navigation\navigation_provider;
+use Symfony\Component\HttpFoundation\StreamedResponse;
+use Symfony\Component\HttpFoundation\Response;
+use phpbb\install\helper\iohandler\factory;
+use phpbb\template\template;
+use phpbb\request\request_interface;
+use phpbb\install\installer;
+use phpbb\language\language;
+
+/**
+ * Controller for installing phpBB
+ */
+class install
+{
+	/**
+	 * @var helper
+	 */
+	protected $controller_helper;
+
+	/**
+	 * @var factory
+	 */
+	protected $iohandler_factory;
+
+	/**
+	 * @var navigation_provider
+	 */
+	protected $menu_provider;
+
+	/**
+	 * @var language
+	 */
+	protected $language;
+
+	/**
+	 * @var template
+	 */
+	protected $template;
+
+	/**
+	 * @var request_interface
+	 */
+	protected $request;
+
+	/**
+	 * @var installer
+	 */
+	protected $installer;
+
+	/**
+	 * @var install_helper
+	 */
+	protected $install_helper;
+
+	/**
+	 * Constructor
+	 *
+	 * @param helper 				$helper
+	 * @param factory 				$factory
+	 * @param navigation_provider	$nav_provider
+	 * @param language				$language
+	 * @param template				$template
+	 * @param request_interface		$request
+	 * @param installer				$installer
+	 * @param install_helper		$install_helper
+	 */
+	public function __construct(helper $helper, factory $factory, navigation_provider $nav_provider, language $language, template $template, request_interface $request, installer $installer, install_helper $install_helper)
+	{
+		$this->controller_helper	= $helper;
+		$this->iohandler_factory	= $factory;
+		$this->menu_provider		= $nav_provider;
+		$this->language				= $language;
+		$this->template				= $template;
+		$this->request				= $request;
+		$this->installer			= $installer;
+		$this->install_helper		= $install_helper;
+	}
+
+	/**
+	 * Controller logic
+	 *
+	 * @return Response|StreamedResponse
+	 *
+	 * @throws http_exception When phpBB is already installed
+	 */
+	public function handle()
+	{
+		if ($this->install_helper->is_phpbb_installed())
+		{
+			throw new http_exception(403, 'INSTALL_PHPBB_INSTALLED');
+		}
+
+		$this->template->assign_vars(array(
+			'U_ACTION' => $this->controller_helper->route('phpbb_installer_install'),
+		));
+
+		// Set up input-output handler
+		if ($this->request->is_ajax())
+		{
+			$this->iohandler_factory->set_environment('ajax');
+		}
+		else
+		{
+			$this->iohandler_factory->set_environment('nojs');
+		}
+
+		// Set the appropriate input-output handler
+		$this->installer->set_iohandler($this->iohandler_factory->get());
+		$this->controller_helper->handle_language_select();
+
+		if ($this->request->is_ajax())
+		{
+			$installer = $this->installer;
+			$response = new StreamedResponse();
+			$response->setCallback(function() use ($installer) {
+				$installer->run();
+			});
+
+			// Try to bypass any server output buffers
+			$response->headers->set('X-Accel-Buffering', 'no');
+
+			return $response;
+		}
+		else
+		{
+			// Determine whether the installation was started or not
+			if (true)
+			{
+				// Set active stage
+				$this->menu_provider->set_nav_property(
+					array('install', 0, 'introduction'),
+					array(
+						'selected'	=> true,
+						'completed'	=> false,
+					)
+				);
+
+				// If not, let's render the welcome page
+				$this->template->assign_vars(array(
+					'SHOW_INSTALL_START_FORM'	=> true,
+					'TITLE'						=> $this->language->lang('INSTALL_INTRO'),
+					'CONTENT'					=> $this->language->lang('INSTALL_INTRO_BODY'),
+				));
+
+				/** @var \phpbb\install\helper\iohandler\iohandler_interface $iohandler */
+				$iohandler = $this->iohandler_factory->get();
+				$this->controller_helper->handle_navigation($iohandler);
+
+				return $this->controller_helper->render('installer_install.html', 'INSTALL', true);
+			}
+
+			// @todo: implement no js controller logic
+		}
+	}
+}
diff --git a/phpBB/phpbb/install/controller/installer_index.php b/phpBB/phpbb/install/controller/installer_index.php
new file mode 100644
index 0000000000..c2d9572284
--- /dev/null
+++ b/phpBB/phpbb/install/controller/installer_index.php
@@ -0,0 +1,81 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\controller;
+
+class installer_index
+{
+	/**
+	 * @var helper
+	 */
+	protected $helper;
+
+	/**
+	 * @var \phpbb\language\language
+	 */
+	protected $language;
+
+	/**
+	 * @var \phpbb\template\template
+	 */
+	protected $template;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * Constructor
+	 *
+	 * @param helper 					$helper
+	 * @param \phpbb\language\language	$language
+	 * @param \phpbb\template\template	$template
+	 * @param string					$phpbb_root_path
+	 */
+	public function __construct(helper $helper, \phpbb\language\language $language, \phpbb\template\template $template, $phpbb_root_path)
+	{
+		$this->helper = $helper;
+		$this->language = $language;
+		$this->template = $template;
+		$this->phpbb_root_path = $phpbb_root_path;
+	}
+
+	public function handle($mode)
+	{
+		$this->helper->handle_language_select();
+
+		switch ($mode)
+		{
+			case "intro":
+				$title = $this->language->lang('INTRODUCTION_TITLE');
+				$body = $this->language->lang('INTRODUCTION_BODY');
+			break;
+			case "support":
+				$title = $this->language->lang('SUPPORT_TITLE');
+				$body = $this->language->lang('SUPPORT_BODY');
+			break;
+			case "license":
+				$title = $this->language->lang('LICENSE_TITLE');
+				$body = implode("<br/>\n", file($this->phpbb_root_path . 'docs/LICENSE.txt'));
+			break;
+		}
+
+		$this->template->assign_vars(array(
+			'TITLE'	=> $title,
+			'BODY'	=> $body,
+		));
+
+		return $this->helper->render('installer_main.html', $title, true);
+	}
+}
diff --git a/phpBB/phpbb/install/controller/timeout_check.php b/phpBB/phpbb/install/controller/timeout_check.php
new file mode 100644
index 0000000000..1c90e3caf3
--- /dev/null
+++ b/phpBB/phpbb/install/controller/timeout_check.php
@@ -0,0 +1,80 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\controller;
+
+use Symfony\Component\HttpFoundation\JsonResponse;
+
+class timeout_check
+{
+	/**
+	 * @var helper
+	 */
+	protected $helper;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * Constructor
+	 *
+	 * @param helper	$helper
+	 * @param string	$phpbb_root_path
+	 */
+	public function __construct(helper $helper, $phpbb_root_path)
+	{
+		$this->helper = $helper;
+		$this->phpbb_root_path = $phpbb_root_path;
+	}
+
+	/**
+	 * Controller for querying installer status
+	 */
+	public function status()
+	{
+		$lock_file = $this->phpbb_root_path . 'store/io_lock.lock';
+		$response = new JsonResponse();
+
+		if (!file_exists($lock_file))
+		{
+			$response->setData(array(
+				'status' => 'fail',
+			));
+		}
+		else
+		{
+			$fp = @fopen($lock_file, 'r');
+
+			if ($fp && flock($fp, LOCK_EX | LOCK_NB))
+			{
+				$status = (filesize($lock_file) >= 2 && fread($fp, 2) === 'ok') ? 'continue' : 'fail';
+
+				$response->setData(array(
+					'status' => $status,
+				));
+				flock($fp, LOCK_UN);
+				fclose($fp);
+			}
+			else
+			{
+				$response->setData(array(
+					'status' => 'running',
+				));
+			}
+		}
+
+		return $response;
+	}
+}
diff --git a/phpBB/phpbb/install/controller/update.php b/phpBB/phpbb/install/controller/update.php
new file mode 100644
index 0000000000..6b88827940
--- /dev/null
+++ b/phpBB/phpbb/install/controller/update.php
@@ -0,0 +1,166 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\controller;
+
+use phpbb\exception\http_exception;
+use phpbb\install\helper\install_helper;
+use phpbb\install\helper\iohandler\factory;
+use phpbb\install\helper\navigation\navigation_provider;
+use phpbb\install\installer;
+use phpbb\language\language;
+use phpbb\request\request_interface;
+use phpbb\template\template;
+use Symfony\Component\HttpFoundation\StreamedResponse;
+
+/**
+ * Updater controller
+ */
+class update
+{
+	/**
+	 * @var helper
+	 */
+	protected $controller_helper;
+
+	/**
+	 * @var installer
+	 */
+	protected $installer;
+
+	/**
+	 * @var install_helper
+	 */
+	protected $install_helper;
+
+	/**
+	 * @var factory
+	 */
+	protected $iohandler_factory;
+
+	/**
+	 * @var language
+	 */
+	protected $language;
+
+	/**
+	 * @var navigation_provider
+	 */
+	protected $menu_provider;
+
+	/**
+	 * @var request_interface
+	 */
+	protected $request;
+
+	/**
+	 * @var template
+	 */
+	protected $template;
+
+	/**
+	 * Constructor
+	 *
+	 * @param helper				$controller_helper
+	 * @param installer				$installer
+	 * @param install_helper		$install_helper
+	 * @param factory				$iohandler
+	 * @param language				$language
+	 * @param navigation_provider	$menu_provider
+	 * @param request_interface		$request
+	 * @param template				$template
+	 */
+	public function __construct(helper $controller_helper, installer $installer, install_helper $install_helper, factory $iohandler, language $language, navigation_provider $menu_provider, request_interface $request, template $template)
+	{
+		$this->controller_helper	= $controller_helper;
+		$this->installer			= $installer;
+		$this->install_helper		= $install_helper;
+		$this->iohandler_factory	= $iohandler;
+		$this->language				= $language;
+		$this->menu_provider		= $menu_provider;
+		$this->request				= $request;
+		$this->template				= $template;
+	}
+
+	/**
+	 * Controller entry point
+	 *
+	 * @return Response|StreamedResponse
+	 *
+	 * @throws http_exception When phpBB is not installed
+	 */
+	public function handle()
+	{
+		if (!$this->install_helper->is_phpbb_installed())
+		{
+			throw new http_exception(403, 'INSTALL_PHPBB_NOT_INSTALLED');
+		}
+
+		$this->template->assign_vars(array(
+			'U_ACTION' => $this->controller_helper->route('phpbb_installer_update'),
+		));
+
+		// Set up input-output handler
+		if ($this->request->is_ajax())
+		{
+			$this->iohandler_factory->set_environment('ajax');
+		}
+		else
+		{
+			$this->iohandler_factory->set_environment('nojs');
+		}
+
+		// Set the appropriate input-output handler
+		$this->installer->set_iohandler($this->iohandler_factory->get());
+		$this->controller_helper->handle_language_select();
+
+		// Render the intro page
+		if ($this->request->is_ajax())
+		{
+			$installer = $this->installer;
+			$response = new StreamedResponse();
+			$response->setCallback(function() use ($installer) {
+				$installer->run();
+			});
+
+			// Try to bypass any server output buffers
+			$response->headers->set('X-Accel-Buffering', 'no');
+			$response->headers->set('Content-type', 'application/json');
+
+			return $response;
+		}
+		else
+		{
+			// Set active stage
+			$this->menu_provider->set_nav_property(
+				array('update', 0, 'introduction'),
+				array(
+					'selected'	=> true,
+					'completed'	=> false,
+				)
+			);
+
+			$this->template->assign_vars(array(
+				'SHOW_INSTALL_START_FORM'	=> true,
+				'TITLE'						=> $this->language->lang('UPDATE_INSTALLATION'),
+				'CONTENT'					=> $this->language->lang('UPDATE_INSTALLATION_EXPLAIN'),
+			));
+
+			/** @var \phpbb\install\helper\iohandler\iohandler_interface $iohandler */
+			$iohandler = $this->iohandler_factory->get();
+			$this->controller_helper->handle_navigation($iohandler);
+
+			return $this->controller_helper->render('installer_update.html', 'UPDATE_INSTALLATION', true);
+		}
+	}
+}
diff --git a/phpBB/phpbb/install/event/kernel_exception_subscriber.php b/phpBB/phpbb/install/event/kernel_exception_subscriber.php
new file mode 100644
index 0000000000..60b7d9a400
--- /dev/null
+++ b/phpBB/phpbb/install/event/kernel_exception_subscriber.php
@@ -0,0 +1,126 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\event;
+
+use phpbb\exception\exception_interface;
+use phpbb\install\controller\helper;
+use phpbb\language\language;
+use phpbb\template\template;
+use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+use Symfony\Component\HttpKernel\Exception\HttpExceptionInterface;
+use Symfony\Component\HttpKernel\KernelEvents;
+use Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent;
+use Symfony\Component\HttpFoundation\JsonResponse;
+
+/**
+ * Exception handler for the installer
+ */
+class kernel_exception_subscriber implements EventSubscriberInterface
+{
+	/**
+	 * @var helper
+	 */
+	protected $controller_helper;
+
+	/**
+	 * @var language
+	 */
+	protected $language;
+
+	/**
+	 * @var template
+	 */
+	protected $template;
+
+	/**
+	 * Constructor
+	 *
+	 * @param helper	$controller_helper
+	 * @param language	$language
+	 * @param template	$template
+	 */
+	public function __construct(helper $controller_helper, language $language, template $template)
+	{
+		$this->controller_helper	= $controller_helper;
+		$this->language				= $language;
+		$this->template				= $template;
+	}
+
+	/**
+	 * This listener is run when the KernelEvents::EXCEPTION event is triggered
+	 *
+	 * @param GetResponseForExceptionEvent	$event
+	 */
+	public function on_kernel_exception(GetResponseForExceptionEvent $event)
+	{
+		$exception = $event->getException();
+		$message = $exception->getMessage();
+
+		if ($exception instanceof exception_interface)
+		{
+			$message = $this->language->lang_array($message, $exception->get_parameters());
+		}
+
+		if (!$event->getRequest()->isXmlHttpRequest())
+		{
+			$this->template->assign_vars(array(
+				'TITLE'	=> $this->language->lang('INFORMATION'),
+				'BODY'	=> $message,
+			));
+
+			$response = $this->controller_helper->render(
+				'installer_main.html',
+				$this->language->lang('INFORMATION'),
+				false,
+				500
+			);
+		}
+		else
+		{
+			$data = array();
+
+			if (!empty($message))
+			{
+				$data['message'] = $message;
+			}
+
+			if (defined('DEBUG'))
+			{
+				$data['trace'] = $exception->getTrace();
+			}
+
+			$response = new JsonResponse($data, 500);
+		}
+
+		if ($exception instanceof HttpExceptionInterface)
+		{
+			$response->setStatusCode($exception->getStatusCode());
+			$response->headers->add($exception->getHeaders());
+		}
+
+		$event->setResponse($response);
+	}
+
+	/**
+	 * Returns an array of events the object is subscribed to
+	 *
+	 * @return array	Array of events the object is subscribed to
+	 */
+	static public function getSubscribedEvents()
+	{
+		return array(
+			KernelEvents::EXCEPTION		=> 'on_kernel_exception',
+		);
+	}
+}
diff --git a/phpBB/phpbb/install/exception/cannot_build_container_exception.php b/phpBB/phpbb/install/exception/cannot_build_container_exception.php
new file mode 100644
index 0000000000..6cf12b008b
--- /dev/null
+++ b/phpBB/phpbb/install/exception/cannot_build_container_exception.php
@@ -0,0 +1,22 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\exception;
+
+/**
+ * Thrown when the container cannot be built
+ */
+class cannot_build_container_exception extends installer_exception
+{
+
+}
diff --git a/phpBB/phpbb/install/exception/file_updater_failure_exception.php b/phpBB/phpbb/install/exception/file_updater_failure_exception.php
new file mode 100644
index 0000000000..46ba2ed32d
--- /dev/null
+++ b/phpBB/phpbb/install/exception/file_updater_failure_exception.php
@@ -0,0 +1,22 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\exception;
+
+/**
+ * Thrown when the file updater fails
+ */
+class file_updater_failure_exception extends installer_exception
+{
+
+}
diff --git a/phpBB/phpbb/install/exception/installer_config_not_writable_exception.php b/phpBB/phpbb/install/exception/installer_config_not_writable_exception.php
new file mode 100644
index 0000000000..51864c5dca
--- /dev/null
+++ b/phpBB/phpbb/install/exception/installer_config_not_writable_exception.php
@@ -0,0 +1,22 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\exception;
+
+/**
+ * Thrown when installer config is not writable to disk
+ */
+class installer_config_not_writable_exception extends installer_exception
+{
+
+}
diff --git a/phpBB/phpbb/install/exception/installer_exception.php b/phpBB/phpbb/install/exception/installer_exception.php
new file mode 100644
index 0000000000..f17dca8f17
--- /dev/null
+++ b/phpBB/phpbb/install/exception/installer_exception.php
@@ -0,0 +1,24 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\exception;
+
+use phpbb\exception\runtime_exception;
+
+/**
+ * Installer's base exception
+ */
+class installer_exception extends runtime_exception
+{
+
+}
diff --git a/phpBB/phpbb/install/exception/invalid_dbms_exception.php b/phpBB/phpbb/install/exception/invalid_dbms_exception.php
new file mode 100644
index 0000000000..38de5f613a
--- /dev/null
+++ b/phpBB/phpbb/install/exception/invalid_dbms_exception.php
@@ -0,0 +1,22 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\exception;
+
+/**
+ * Thrown when an unavailable DBMS has been selected
+ */
+class invalid_dbms_exception extends installer_exception
+{
+
+}
diff --git a/phpBB/phpbb/install/exception/jump_to_restart_point_exception.php b/phpBB/phpbb/install/exception/jump_to_restart_point_exception.php
new file mode 100644
index 0000000000..b628c4fbe3
--- /dev/null
+++ b/phpBB/phpbb/install/exception/jump_to_restart_point_exception.php
@@ -0,0 +1,44 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\exception;
+
+class jump_to_restart_point_exception extends installer_exception
+{
+	/**
+	 * @var string
+	 */
+	protected $restart_point_name;
+
+	/**
+	 * Constructor
+	 *
+	 * @param string $restart_point_name
+	 */
+	public function __construct($restart_point_name)
+	{
+		$this->restart_point_name = $restart_point_name;
+
+		parent::__construct();
+	}
+
+	/**
+	 * Returns the restart point's name
+	 *
+	 * @return string
+	 */
+	public function get_restart_point_name()
+	{
+		return $this->restart_point_name;
+	}
+}
diff --git a/phpBB/phpbb/install/exception/resource_limit_reached_exception.php b/phpBB/phpbb/install/exception/resource_limit_reached_exception.php
new file mode 100644
index 0000000000..025e09fbd3
--- /dev/null
+++ b/phpBB/phpbb/install/exception/resource_limit_reached_exception.php
@@ -0,0 +1,22 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\exception;
+
+/**
+ * Thrown when the installer is out of memory or time
+ */
+class resource_limit_reached_exception extends installer_exception
+{
+
+}
diff --git a/phpBB/phpbb/install/exception/user_interaction_required_exception.php b/phpBB/phpbb/install/exception/user_interaction_required_exception.php
new file mode 100644
index 0000000000..d65a448841
--- /dev/null
+++ b/phpBB/phpbb/install/exception/user_interaction_required_exception.php
@@ -0,0 +1,25 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\exception;
+
+/**
+ * This exception should be thrown when user interaction is inevitable
+ *
+ * Note: Please note that the output should already be setup for the user
+ * 		 when you use throw this exception
+ */
+class user_interaction_required_exception extends installer_exception
+{
+
+}
diff --git a/phpBB/phpbb/install/helper/config.php b/phpBB/phpbb/install/helper/config.php
new file mode 100644
index 0000000000..7eb0ae3b05
--- /dev/null
+++ b/phpBB/phpbb/install/helper/config.php
@@ -0,0 +1,452 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\helper;
+
+use phpbb\install\exception\installer_config_not_writable_exception;
+
+/**
+ * Stores common settings and installation status
+ */
+class config
+{
+	/**
+	 * @var \phpbb\filesystem\filesystem_interface
+	 */
+	protected $filesystem;
+
+	/**
+	 * Array which contains config settings for the installer
+	 *
+	 * The array will also store all the user input, as well as any
+	 * data that is passed to other tasks by a task.
+	 *
+	 * @var array
+	 */
+	protected $installer_config;
+
+	/**
+	 * @var string
+	 */
+	protected $install_config_file;
+
+	/**
+	 * @var \bantu\IniGetWrapper\IniGetWrapper
+	 */
+	protected $php_ini;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * Array containing progress information
+	 *
+	 * @var array
+	 */
+	protected $progress_data;
+
+	/**
+	 * Array containing system information
+	 *
+	 * The array contains run time and memory limitations.
+	 *
+	 * @var array
+	 */
+	protected $system_data;
+
+	/**
+	 * Array containing navigation bar information
+	 *
+	 * @var array
+	 */
+	protected $navigation_data;
+
+	/**
+	 * Flag indicating that config file should be cleaned up
+	 *
+	 * @var bool
+	 */
+	protected $do_clean_up;
+
+	/**
+	 * Constructor
+	 */
+	public function __construct(\phpbb\filesystem\filesystem_interface $filesystem, \bantu\IniGetWrapper\IniGetWrapper $php_ini, $phpbb_root_path)
+	{
+		$this->filesystem		= $filesystem;
+		$this->php_ini			= $php_ini;
+		$this->phpbb_root_path	= $phpbb_root_path;
+		$this->do_clean_up		= false;
+
+		// Set up data arrays
+		$this->navigation_data	= array();
+		$this->installer_config	= array();
+		$this->system_data		= array();
+		$this->progress_data	= array(
+			'last_task_module_name'		=> '', // Stores the service name of the latest finished module
+			'last_task_module_index'	=> 0, // Stores the index of the latest finished module
+			'last_task_index'			=> 0, // Stores the index of the latest finished task
+			'max_task_progress'			=> 0,
+			'current_task_progress'		=> 0,
+			'_restart_points'			=> array(),
+			'use_restart_point'			=> false,
+		);
+
+		$this->install_config_file = $this->phpbb_root_path . 'store/install_config.php';
+
+		$this->setup_system_data();
+	}
+
+	/**
+	 * Returns data for a specified parameter
+	 *
+	 * @param	string	$param_name	Name of the parameter to return
+	 * @param	mixed	$default	Default value to return when the specified data
+	 * 								does not exist.
+	 *
+	 * @return 	mixed	value of the specified parameter or the default value if the data
+	 * 					cannot be recovered.
+	 */
+	public function get($param_name, $default = false)
+	{
+		return (isset($this->installer_config[$param_name])) ? $this->installer_config[$param_name] : $default;
+	}
+
+	/**
+	 * Sets a parameter in installer_config
+	 *
+	 * @param	string	$param_name	Name of the parameter
+	 * @param	mixed	$value		Values to set the parameter
+	 */
+	public function set($param_name, $value)
+	{
+		$this->installer_config = array_merge($this->installer_config, array(
+			$param_name => $value,
+		));
+	}
+
+	/**
+	 * Returns system parameter
+	 *
+	 * @param string	$param_name	Name of the parameter
+	 *
+	 * @return mixed	Returns system parameter if it is defined, false otherwise
+	 */
+	public function system_get($param_name)
+	{
+		return (isset($this->system_data[$param_name])) ? $this->system_data[$param_name] : false;
+	}
+
+	/**
+	 * Returns remaining time until the run time limit
+	 *
+	 * @return int	Remaining time until the run time limit in seconds
+	 */
+	public function get_time_remaining()
+	{
+		if ($this->system_data['max_execution_time'] <= 0)
+		{
+			return PHP_INT_MAX;
+		}
+
+		return ($this->system_data['start_time'] + $this->system_data['max_execution_time']) - microtime(true);
+	}
+
+	/**
+	 * Returns remaining memory available for PHP
+	 *
+	 * @return int	Remaining memory until reaching the limit
+	 */
+	public function get_memory_remaining()
+	{
+		if ($this->system_data['memory_limit'] <= 0)
+		{
+			return 1;
+		}
+
+		if (function_exists('memory_get_usage'))
+		{
+			return ($this->system_data['memory_limit'] - memory_get_usage());
+		}
+
+		// If we cannot get the information then just return a positive number (and cross fingers)
+		return 1;
+	}
+
+	/**
+	 * Saves the latest executed task
+	 *
+	 * @param int	$task_service_index	Index of the installer task service in the module
+	 */
+	public function set_finished_task($task_service_index)
+	{
+		$this->progress_data['last_task_index']	= $task_service_index;
+	}
+
+	/**
+	 * Set active module
+	 *
+	 * @param string	$module_service_name	Name of the installer module service
+	 * @param int		$module_service_index	Index of the installer module service
+	 */
+	public function set_active_module($module_service_name, $module_service_index)
+	{
+		$this->progress_data['last_task_module_name']	= $module_service_name;
+		$this->progress_data['last_task_module_index']	= $module_service_index;
+	}
+
+	/**
+	 * Getter for progress data
+	 *
+	 * @return array
+	 */
+	public function get_progress_data()
+	{
+		return $this->progress_data;
+	}
+
+	/**
+	 * Recovers install configuration from file
+	 */
+	public function load_config()
+	{
+		if (!$this->filesystem->exists($this->install_config_file))
+		{
+			return;
+		}
+
+		$file_content = @file_get_contents($this->install_config_file);
+		$serialized_data = trim(substr($file_content, 8));
+
+		$installer_config = array();
+		$progress_data = array();
+		$navigation_data = array();
+
+		if (!empty($serialized_data))
+		{
+			$unserialized_data = json_decode($serialized_data, true);
+
+			$installer_config = (is_array($unserialized_data['installer_config'])) ? $unserialized_data['installer_config'] : array();
+			$progress_data = (is_array($unserialized_data['progress_data'])) ? $unserialized_data['progress_data'] : array();
+			$navigation_data = (is_array($unserialized_data['navigation_data'])) ? $unserialized_data['navigation_data'] : array();
+		}
+
+		$this->installer_config = array_merge($this->installer_config, $installer_config);
+		$this->progress_data = array_merge($this->progress_data, $progress_data);
+		$this->navigation_data = array_merge($this->navigation_data, $navigation_data);
+	}
+
+	/**
+	 * Creates a progress restart point
+	 *
+	 * Restart points can be used to repeat certain tasks periodically.
+	 * You need to call this method from the first task you want to repeat.
+	 *
+	 * @param string	$name	Name of the restart point
+	 */
+	public function create_progress_restart_point($name)
+	{
+		$tmp_progress_data = $this->progress_data;
+		unset($tmp_progress_data['_restart_points']);
+
+		$this->progress_data['_restart_points'][$name] = $tmp_progress_data;
+	}
+
+	/**
+	 * Set restart point to continue from
+	 *
+	 * @param string	$name	Name of the restart point
+	 *
+	 * @return bool	Returns false if the restart point name does not exist, otherwise true
+	 */
+	public function jump_to_restart_point($name)
+	{
+		if (!isset($this->progress_data['_restart_points'][$name]) || empty($this->progress_data['_restart_points'][$name]))
+		{
+			return false;
+		}
+
+		foreach ($this->progress_data['_restart_points'][$name] as $key => $value)
+		{
+			$this->progress_data[$key] = $value;
+		}
+
+		return true;
+	}
+
+	/**
+	 * Returns whether a restart point with a given name exists or not
+	 *
+	 * @param string	$name Name of the restart point
+	 *
+	 * @return bool
+	 */
+	public function has_restart_point($name)
+	{
+		return isset($this->progress_data['_restart_points'][$name]);
+	}
+
+	/**
+	 * Dumps install configuration to disk
+	 */
+	public function save_config()
+	{
+		if ($this->do_clean_up)
+		{
+			@unlink($this->install_config_file);
+			return;
+		}
+
+		// Create array to save
+		$save_array = array(
+			'installer_config'	=> $this->installer_config,
+			'progress_data'		=> $this->progress_data,
+			'navigation_data'	=> $this->navigation_data,
+		);
+
+		// Create file content
+		$file_content = '<?php // ';
+		$file_content .= json_encode($save_array);
+		$file_content .= "\n";
+
+		// Dump file_content to disk
+		$fp = @fopen($this->install_config_file, 'w');
+		if (!$fp)
+		{
+			throw new installer_config_not_writable_exception();
+		}
+
+		fwrite($fp, $file_content);
+		fclose($fp);
+		// Enforce 0600 permission for install config
+		$this->filesystem->chmod([$this->install_config_file], 0600);
+	}
+
+	/**
+	 * Increments the task progress
+	 *
+	 * @param int	$increment_by	The amount to increment by
+	 */
+	public function increment_current_task_progress($increment_by = 1)
+	{
+		$this->progress_data['current_task_progress'] += $increment_by;
+
+		if ($this->progress_data['current_task_progress'] > $this->progress_data['max_task_progress'])
+		{
+			$this->progress_data['current_task_progress'] = $this->progress_data['max_task_progress'];
+		}
+	}
+
+	/**
+	 * Sets the task progress to a specific number
+	 *
+	 * @param int	$task_progress	The task progress number to be set
+	 */
+	public function set_current_task_progress($task_progress)
+	{
+		$this->progress_data['current_task_progress'] = $task_progress;
+	}
+
+	/**
+	 * Sets the number of tasks belonging to the installer in the current mode.
+	 *
+	 * @param int	$task_progress_count	Number of tasks
+	 */
+	public function set_task_progress_count($task_progress_count)
+	{
+		$this->progress_data['max_task_progress'] = $task_progress_count;
+	}
+
+	/**
+	 * Returns the number of the current task being executed
+	 *
+	 * @return int
+	 */
+	public function get_current_task_progress()
+	{
+		return $this->progress_data['current_task_progress'];
+	}
+
+	/**
+	 * Returns the number of tasks belonging to the installer in the current mode.
+	 *
+	 * @return int
+	 */
+	public function get_task_progress_count()
+	{
+		return $this->progress_data['max_task_progress'];
+	}
+
+	/**
+	 * Marks stage as completed in the navigation bar
+	 *
+	 * @param array	$nav_path	Array to the navigation elem
+	 */
+	public function set_finished_navigation_stage($nav_path)
+	{
+		if (isset($this->navigation_data['finished']) && in_array($nav_path, $this->navigation_data['finished']))
+		{
+			return;
+		}
+
+		$this->navigation_data['finished'][] = $nav_path;
+	}
+
+	/**
+	 * Marks stage as active in the navigation bar
+	 *
+	 * @param array	$nav_path	Array to the navigation elem
+	 */
+	public function set_active_navigation_stage($nav_path)
+	{
+		$this->navigation_data['active'] = $nav_path;
+	}
+
+	/**
+	 * Returns navigation data
+	 *
+	 * @return array
+	 */
+	public function get_navigation_data()
+	{
+		return $this->navigation_data;
+	}
+
+	/**
+	 * Removes install config file
+	 */
+	public function clean_up_config_file()
+	{
+		$this->do_clean_up = true;
+		@unlink($this->install_config_file);
+	}
+
+	/**
+	 * Filling up system_data array
+	 */
+	protected function setup_system_data()
+	{
+		// Query maximum runtime from php.ini
+		$execution_time = $this->php_ini->getNumeric('max_execution_time');
+		$execution_time = min(15, $execution_time / 2);
+		$this->system_data['max_execution_time'] = $execution_time;
+
+		// Set start time
+		$this->system_data['start_time'] = microtime(true);
+
+		// Get memory limit
+		$this->system_data['memory_limit'] = $this->php_ini->getBytes('memory_limit');
+	}
+}
diff --git a/phpBB/phpbb/install/helper/container_factory.php b/phpBB/phpbb/install/helper/container_factory.php
new file mode 100644
index 0000000000..9e372fecde
--- /dev/null
+++ b/phpBB/phpbb/install/helper/container_factory.php
@@ -0,0 +1,191 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\helper;
+
+use phpbb\install\exception\cannot_build_container_exception;
+use phpbb\language\language;
+use phpbb\request\request;
+
+class container_factory
+{
+	/**
+	 * @var language
+	 */
+	protected $language;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * @var string
+	 */
+	protected $php_ext;
+
+	/**
+	 * @var \phpbb\request\request
+	 */
+	protected $request;
+
+	/**
+	 * @var update_helper
+	 */
+	protected $update_helper;
+
+	/**
+	 * The full phpBB container
+	 *
+	 * @var \Symfony\Component\DependencyInjection\ContainerInterface
+	 */
+	protected $container;
+
+	/**
+	 * Constructor
+	 *
+	 * @param language 		$language			Language service
+	 * @param request		$request			Request interface
+	 * @param update_helper	$update_helper		Update helper
+	 * @param string		$phpbb_root_path	Path to phpBB's root
+	 * @param string		$php_ext			Extension of PHP files
+	 */
+	public function __construct(language $language, request $request, update_helper $update_helper, $phpbb_root_path, $php_ext)
+	{
+		$this->language			= $language;
+		$this->request			= $request;
+		$this->update_helper	= $update_helper;
+		$this->phpbb_root_path	= $phpbb_root_path;
+		$this->php_ext			= $php_ext;
+		$this->container		= null;
+	}
+
+	/**
+	 * Container getter
+	 *
+	 * @param null|string	$service_name	Name of the service to return
+	 *
+	 * @return \Symfony\Component\DependencyInjection\ContainerInterface|Object	phpBB's dependency injection container
+	 * 																			or the service specified in $service_name
+	 *
+	 * @throws \phpbb\install\exception\cannot_build_container_exception							When container cannot be built
+	 * @throws \Symfony\Component\DependencyInjection\Exception\InvalidArgumentException			If the service is not defined
+	 * @throws \Symfony\Component\DependencyInjection\Exception\ServiceCircularReferenceException	When a circular reference is detected
+	 * @throws \Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException			When the service is not defined
+	 */
+	public function get($service_name = null)
+	{
+		// Check if container was built, if not try to build it
+		if ($this->container === null)
+		{
+			$this->build_container();
+		}
+
+		return ($service_name === null) ? $this->container : $this->container->get($service_name);
+	}
+
+	/**
+	 * Returns the specified parameter from the container
+	 *
+	 * @param string	$param_name
+	 *
+	 * @return mixed
+	 *
+	 * @throws \phpbb\install\exception\cannot_build_container_exception	When container cannot be built
+	 */
+	public function get_parameter($param_name)
+	{
+		// Check if container was built, if not try to build it
+		if ($this->container === null)
+		{
+			$this->build_container();
+		}
+
+		return $this->container->getParameter($param_name);
+	}
+
+	/**
+	 * Build dependency injection container
+	 *
+	 * @throws \phpbb\install\exception\cannot_build_container_exception	When container cannot be built
+	 */
+	protected function build_container()
+	{
+		// If the container has been already built just return.
+		// Although this should never happen
+		if ($this->container instanceof \Symfony\Component\DependencyInjection\ContainerInterface)
+		{
+			return;
+		}
+
+		// Check whether container can be built
+		// We need config.php for that so let's check if it has been set up yet
+		if (!filesize($this->phpbb_root_path . 'config.' . $this->php_ext))
+		{
+			throw new cannot_build_container_exception();
+		}
+
+		$phpbb_config_php_file = new \phpbb\config_php_file($this->phpbb_root_path, $this->php_ext);
+		$phpbb_container_builder = new \phpbb\di\container_builder($this->phpbb_root_path, $this->php_ext);
+
+		// For BC with functions that we need during install
+		global $phpbb_container, $table_prefix;
+
+		$disable_super_globals = $this->request->super_globals_disabled();
+
+		// This is needed because container_builder::get_env_parameters() uses $_SERVER
+		if ($disable_super_globals)
+		{
+			$this->request->enable_super_globals();
+		}
+
+		$other_config_path = $this->phpbb_root_path . 'install/update/new/config';
+		$config_path = (is_dir($other_config_path)) ? $other_config_path : $this->phpbb_root_path . 'config';
+
+		$this->container = $phpbb_container_builder
+			->with_environment('production')
+			->with_config($phpbb_config_php_file)
+			->with_config_path($config_path)
+			->without_compiled_container()
+			->get_container();
+
+		// Setting request is required for the compatibility globals as those are generated from
+		// this container
+		if (!$this->container->isFrozen())
+		{
+			$this->container->register('request')->setSynthetic(true);
+			$this->container->register('language')->setSynthetic(true);
+		}
+
+		$this->container->set('request', $this->request);
+		$this->container->set('language', $this->language);
+
+		$this->container->compile();
+
+		$phpbb_container = $this->container;
+		$table_prefix = $phpbb_config_php_file->get('table_prefix');
+
+		// Restore super globals to previous state
+		if ($disable_super_globals)
+		{
+			$this->request->disable_super_globals();
+		}
+
+		// Get compatibilty globals and constants
+		$this->update_helper->include_file('includes/compatibility_globals.' . $this->php_ext);
+
+		register_compatibility_globals();
+
+		$this->update_helper->include_file('includes/constants.' . $this->php_ext);
+	}
+}
diff --git a/phpBB/phpbb/install/helper/database.php b/phpBB/phpbb/install/helper/database.php
new file mode 100644
index 0000000000..fa5a10c6fc
--- /dev/null
+++ b/phpBB/phpbb/install/helper/database.php
@@ -0,0 +1,439 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\helper;
+
+use phpbb\install\exception\invalid_dbms_exception;
+
+/**
+ * Database related general functionality for installer
+ */
+class database
+{
+	/**
+	 * @var \phpbb\filesystem\filesystem_interface
+	 */
+	protected $filesystem;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * @var array
+	 */
+	protected $supported_dbms = array(
+		// Note: php 5.5 alpha 2 deprecated mysql.
+		// Keep mysqli before mysql in this list.
+		'mysqli'	=> array(
+			'LABEL'			=> 'MySQL with MySQLi Extension',
+			'SCHEMA'		=> 'mysql_41',
+			'MODULE'		=> 'mysqli',
+			'DELIM'			=> ';',
+			'DRIVER'		=> 'phpbb\db\driver\mysqli',
+			'AVAILABLE'		=> true,
+			'2.0.x'			=> true,
+		),
+		'mysql'		=> array(
+			'LABEL'			=> 'MySQL',
+			'SCHEMA'		=> 'mysql',
+			'MODULE'		=> 'mysql',
+			'DELIM'			=> ';',
+			'DRIVER'		=> 'phpbb\db\driver\mysql',
+			'AVAILABLE'		=> true,
+			'2.0.x'			=> true,
+		),
+		'mssql_odbc'=>	array(
+			'LABEL'			=> 'MS SQL Server [ ODBC ]',
+			'SCHEMA'		=> 'mssql',
+			'MODULE'		=> 'odbc',
+			'DELIM'			=> ';',
+			'DRIVER'		=> 'phpbb\db\driver\mssql_odbc',
+			'AVAILABLE'		=> true,
+			'2.0.x'			=> true,
+		),
+		'mssqlnative'		=> array(
+			'LABEL'			=> 'MS SQL Server 2005+ [ Native ]',
+			'SCHEMA'		=> 'mssql',
+			'MODULE'		=> 'sqlsrv',
+			'DELIM'			=> ';',
+			'DRIVER'		=> 'phpbb\db\driver\mssqlnative',
+			'AVAILABLE'		=> true,
+			'2.0.x'			=> false,
+		),
+		'oracle'	=>	array(
+			'LABEL'			=> 'Oracle',
+			'SCHEMA'		=> 'oracle',
+			'MODULE'		=> 'oci8',
+			'DELIM'			=> ';',
+			'DRIVER'		=> 'phpbb\db\driver\oracle',
+			'AVAILABLE'		=> true,
+			'2.0.x'			=> false,
+		),
+		'postgres' => array(
+			'LABEL'			=> 'PostgreSQL 8.3+',
+			'SCHEMA'		=> 'postgres',
+			'MODULE'		=> 'pgsql',
+			'DELIM'			=> ';',
+			'DRIVER'		=> 'phpbb\db\driver\postgres',
+			'AVAILABLE'		=> true,
+			'2.0.x'			=> true,
+		),
+		'sqlite3'		=> array(
+			'LABEL'			=> 'SQLite3',
+			'SCHEMA'		=> 'sqlite',
+			'MODULE'		=> 'sqlite3',
+			'DELIM'			=> ';',
+			'DRIVER'		=> 'phpbb\db\driver\sqlite3',
+			'AVAILABLE'		=> true,
+			'2.0.x'			=> false,
+		),
+	);
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\filesystem\filesystem_interface	$filesystem			Filesystem interface
+	 * @param string									$phpbb_root_path	Path to phpBB's root
+	 */
+	public function __construct(\phpbb\filesystem\filesystem_interface $filesystem, $phpbb_root_path)
+	{
+		$this->filesystem		= $filesystem;
+		$this->phpbb_root_path	= $phpbb_root_path;
+	}
+
+	/**
+	 * Returns an array of available DBMS supported by phpBB
+	 *
+	 * If a DBMS is specified it will only return data for that DBMS
+	 * and will load its extension if necessary.
+	 *
+	 * @param	mixed	$dbms				name of the DBMS that's info is required or false for all DBMS info
+	 * @param	bool	$return_unavailable	set it to true if you expect unavailable but supported DBMS
+	 * 										returned as well
+	 * @param	bool	$only_20x_options	set it to true if you only want to recover 2.0.x options
+	 *
+	 * @return	array	Array of available and supported DBMS
+	 */
+	public function get_available_dbms($dbms = false, $return_unavailable = false, $only_20x_options = false)
+	{
+		$available_dbms = $this->supported_dbms;
+
+		if ($dbms)
+		{
+			if (isset($this->supported_dbms[$dbms]))
+			{
+				$available_dbms = array($dbms => $this->supported_dbms[$dbms]);
+			}
+			else
+			{
+				return array();
+			}
+		}
+
+		$any_dbms_available = false;
+		foreach ($available_dbms as $db_name => $db_array)
+		{
+			if ($only_20x_options && !$db_array['2.0.x'])
+			{
+				if ($return_unavailable)
+				{
+					$available_dbms[$db_name]['AVAILABLE'] = false;
+				}
+				else
+				{
+					unset($available_dbms[$db_name]);
+				}
+
+				continue;
+			}
+
+			$dll = $db_array['MODULE'];
+			if (!@extension_loaded($dll))
+			{
+				if ($return_unavailable)
+				{
+					$available_dbms[$db_name]['AVAILABLE'] = false;
+				}
+				else
+				{
+					unset($available_dbms[$db_name]);
+				}
+
+				continue;
+			}
+
+			$any_dbms_available = true;
+		}
+
+		if ($return_unavailable)
+		{
+			$available_dbms['ANY_DB_SUPPORT'] = $any_dbms_available;
+		}
+
+		return $available_dbms;
+	}
+
+	/**
+	 * Removes "/* style" as well as "# style" comments from $input.
+	 *
+	 * @param string $sql_query	Input string
+	 *
+	 * @return string Input string with comments removed
+	 */
+	public function remove_comments($sql_query)
+	{
+		// Remove /* */ comments (http://ostermiller.org/findcomment.html)
+		$sql_query = preg_replace('#/\*(.|[\r\n])*?\*/#', "\n", $sql_query);
+
+		// Remove # style comments
+		$sql_query = preg_replace('/\n{2,}/', "\n", preg_replace('/^#.*$/m', "\n", $sql_query));
+
+		return $sql_query;
+	}
+
+	/**
+	 * split_sql_file() will split an uploaded sql file into single sql statements.
+	 *
+	 * Note: expects trim() to have already been run on $sql.
+	 *
+	 * @param	string	$sql		SQL statements
+	 * @param	string	$delimiter	Delimiter between sql statements
+	 *
+	 * @return array Array of sql statements
+	 */
+	public function split_sql_file($sql, $delimiter)
+	{
+		$sql = str_replace("\r" , '', $sql);
+		$data = preg_split('/' . preg_quote($delimiter, '/') . '$/m', $sql);
+
+		$data = array_map('trim', $data);
+
+		// The empty case
+		$end_data = end($data);
+
+		if (empty($end_data))
+		{
+			unset($data[key($data)]);
+		}
+
+		return $data;
+	}
+
+	/**
+	 * Validates table prefix
+	 *
+	 * @param string	$dbms			The selected dbms
+	 * @param string	$table_prefix	The table prefix to validate
+	 *
+	 * @return bool|array	true if table prefix is valid, array of errors otherwise
+	 *
+	 * @throws \phpbb\install\exception\invalid_dbms_exception When $dbms is not a valid
+	 */
+	public function validate_table_prefix($dbms, $table_prefix)
+	{
+		$errors = array();
+
+		if (!preg_match('#^[a-zA-Z][a-zA-Z0-9_]*$#', $table_prefix))
+		{
+			$errors[] = array(
+				'title' => 'INST_ERR_DB_INVALID_PREFIX',
+			);
+		}
+
+		// Do dbms specific checks
+		$dbms_info = $this->get_available_dbms($dbms);
+		switch ($dbms_info[$dbms]['SCHEMA'])
+		{
+			case 'mysql':
+			case 'mysql_41':
+				$prefix_length = 36;
+			break;
+			case 'mssql':
+				$prefix_length = 90;
+			break;
+			case 'oracle':
+				$prefix_length = 6;
+			break;
+			case 'postgres':
+				$prefix_length = 36;
+			break;
+			case 'sqlite':
+				$prefix_length = 200;
+			break;
+			default:
+				throw new invalid_dbms_exception();
+			break;
+		}
+
+		// Check the prefix length to ensure that index names are not too long
+		if (strlen($table_prefix) > $prefix_length)
+		{
+			$errors[] = array(
+				'title' => array('INST_ERR_PREFIX_TOO_LONG', $prefix_length),
+			);
+		}
+
+		return (empty($errors)) ? true : $errors;
+	}
+
+	/**
+	 * Check if the user provided database parameters are correct
+	 *
+	 * This function checks the database connection data and also checks for
+	 * any other problems that could cause an error during the installation
+	 * such as if there is any database table names conflicting.
+	 *
+	 * Note: The function assumes that $table_prefix has been already validated
+	 * with validate_table_prefix().
+	 *
+	 * @param string	$dbms			Selected database type
+	 * @param string	$dbhost			Database host address
+	 * @param int		$dbport			Database port number
+	 * @param string	$dbuser			Database username
+	 * @param string	$dbpass			Database password
+	 * @param string	$dbname			Database name
+	 * @param string	$table_prefix	Database table prefix
+	 *
+	 * @return array|bool	Returns true if test is successful, array of errors otherwise
+	 */
+	public function check_database_connection($dbms, $dbhost, $dbport, $dbuser, $dbpass, $dbname, $table_prefix)
+	{
+		$dbms_info = $this->get_available_dbms($dbms);
+		$dbms_info = $dbms_info[$dbms];
+		$errors = array();
+
+		// Instantiate it and set return on error true
+		/** @var \phpbb\db\driver\driver_interface $db */
+		$db = new $dbms_info['DRIVER'];
+		$db->sql_return_on_error(true);
+
+		// Check that we actually have a database name before going any further
+		if (!in_array($dbms_info['SCHEMA'], array('sqlite', 'oracle'), true) && $dbname === '')
+		{
+			$errors[] = array(
+				'title' => 'INST_ERR_DB_NO_NAME',
+			);
+		}
+
+		// Make sure we don't have a daft user who thinks having the SQLite database in the forum directory is a good idea
+		if ($dbms_info['SCHEMA'] === 'sqlite'
+			&& stripos($this->filesystem->realpath($dbhost), $this->filesystem->realpath($this->phpbb_root_path) === 0))
+		{
+			$errors[] = array(
+				'title' =>'INST_ERR_DB_FORUM_PATH',
+			);
+		}
+
+		// Check if SQLite database is writable
+		if ($dbms_info['SCHEMA'] === 'sqlite'
+			&& (($this->filesystem->exists($dbhost) && !$this->filesystem->is_writable($dbhost)) || !$this->filesystem->is_writable(pathinfo($dbhost, PATHINFO_DIRNAME))))
+		{
+			$errors[] = array(
+				'title' =>'INST_ERR_DB_NO_WRITABLE',
+			);
+		}
+
+		// Try to connect to db
+		if (is_array($db->sql_connect($dbhost, $dbuser, $dbpass, $dbname, $dbport, false, true)))
+		{
+			$db_error = $db->sql_error();
+			$errors[] = array(
+				'title' => 'INST_ERR_DB_CONNECT',
+				'description' => ($db_error['message']) ? utf8_convert_message($db_error['message']) : 'INST_ERR_DB_NO_ERROR',
+			);
+		}
+		else
+		{
+			// Check if there is any table name collisions
+			$temp_prefix = strtolower($table_prefix);
+			$table_ary = array(
+				$temp_prefix . 'attachments',
+				$temp_prefix . 'config',
+				$temp_prefix . 'sessions',
+				$temp_prefix . 'topics',
+				$temp_prefix . 'users',
+			);
+
+			$db_tools_factory = new \phpbb\db\tools\factory();
+			$db_tools = $db_tools_factory->get($db);
+			$tables = $db_tools->sql_list_tables();
+			$tables = array_map('strtolower', $tables);
+			$table_intersect = array_intersect($tables, $table_ary);
+
+			if (count($table_intersect))
+			{
+				$errors[] = array(
+					'title' => 'INST_ERR_PREFIX',
+				);
+			}
+
+			// Check if database version is supported
+			switch ($dbms)
+			{
+				case 'mysqli':
+					if (version_compare($db->sql_server_info(true), '4.1.3', '<'))
+					{
+						$errors[] = array(
+							'title' => 'INST_ERR_DB_NO_MYSQLI',
+						);
+					}
+				break;
+				case 'sqlite3':
+					if (version_compare($db->sql_server_info(true), '3.6.15', '<'))
+					{
+						$errors[] = array(
+							'title' => 'INST_ERR_DB_NO_SQLITE3',
+						);
+					}
+				break;
+				case 'oracle':
+					$sql = "SELECT *
+						FROM NLS_DATABASE_PARAMETERS
+						WHERE PARAMETER = 'NLS_RDBMS_VERSION'
+							OR PARAMETER = 'NLS_CHARACTERSET'";
+					$result = $db->sql_query($sql);
+
+					while ($row = $db->sql_fetchrow($result))
+					{
+						$stats[$row['parameter']] = $row['value'];
+					}
+					$db->sql_freeresult($result);
+
+					if (version_compare($stats['NLS_RDBMS_VERSION'], '9.2', '<') && $stats['NLS_CHARACTERSET'] !== 'UTF8')
+					{
+						$errors[] = array(
+							'title' => 'INST_ERR_DB_NO_ORACLE',
+						);
+					}
+				break;
+				case 'postgres':
+					$sql = "SHOW server_encoding;";
+					$result = $db->sql_query($sql);
+					$row = $db->sql_fetchrow($result);
+					$db->sql_freeresult($result);
+
+					if ($row['server_encoding'] !== 'UNICODE' && $row['server_encoding'] !== 'UTF8')
+					{
+						$errors[] = array(
+							'title' => 'INST_ERR_DB_NO_POSTGRES',
+						);
+					}
+				break;
+			}
+		}
+
+		return (empty($errors)) ? true : $errors;
+	}
+}
diff --git a/phpBB/phpbb/install/helper/file_updater/compression_file_updater.php b/phpBB/phpbb/install/helper/file_updater/compression_file_updater.php
new file mode 100644
index 0000000000..ede992fb6e
--- /dev/null
+++ b/phpBB/phpbb/install/helper/file_updater/compression_file_updater.php
@@ -0,0 +1,133 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\helper\file_updater;
+
+use phpbb\install\helper\update_helper;
+
+/**
+ * File updater for generating archive with updated files
+ */
+class compression_file_updater implements file_updater_interface
+{
+	/**
+	 * @var \compress
+	 */
+	protected $compress;
+
+	/**
+	 * @var update_helper
+	 */
+	protected $update_helper;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * @var string
+	 */
+	protected $php_ext;
+
+	/**
+	 * Constructor
+	 *
+	 * @param update_helper	$update_helper
+	 * @param string		$phpbb_root_path
+	 * @param string		$php_ext
+	 */
+	public function __construct(update_helper $update_helper, $phpbb_root_path, $php_ext)
+	{
+		$this->compress			= null;
+		$this->update_helper	= $update_helper;
+		$this->phpbb_root_path	= $phpbb_root_path;
+		$this->php_ext			= $php_ext;
+	}
+
+	/**
+	 * Set the compression method
+	 *
+	 * @param string	$method	Compression method's file extension
+	 *
+	 * @return string	Archive's filename
+	 */
+	public function init($method)
+	{
+		$this->update_helper->include_file('includes/functions_compress.' . $this->php_ext);
+
+		$archive_filename = 'update_archive_' . time() . '_' . uniqid();
+		$path = $this->phpbb_root_path . 'store/' . $archive_filename . '' . $method;
+
+		if ($method === '.zip')
+		{
+			$this->compress = new \compress_zip('w', $path);
+		}
+		else
+		{
+			$this->compress = new \compress_tar('w', $path, $method);
+		}
+
+		return $path;
+	}
+
+	/**
+	 * Close archive writing process
+	 */
+	public function close()
+	{
+		$this->compress->close();
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function delete_file($path_to_file)
+	{
+		// We do absolutely nothing here, as this function is called when a file should be
+		// removed from the filesystem, but since this is an archive generator, it clearly
+		// cannot do that.
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function create_new_file($path_to_file_to_create, $source, $create_from_content = false)
+	{
+		if ($create_from_content)
+		{
+			$this->compress->add_data($source, $path_to_file_to_create);
+		}
+		else
+		{
+			$this->compress->add_custom_file($source, $path_to_file_to_create);
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function update_file($path_to_file_to_update, $source, $create_from_content = false)
+	{
+		// Both functions are identical here
+		$this->create_new_file($path_to_file_to_update, $source, $create_from_content);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_method_name()
+	{
+		return 'compression';
+	}
+}
diff --git a/phpBB/phpbb/install/helper/file_updater/factory.php b/phpBB/phpbb/install/helper/file_updater/factory.php
new file mode 100644
index 0000000000..d3a2f22782
--- /dev/null
+++ b/phpBB/phpbb/install/helper/file_updater/factory.php
@@ -0,0 +1,69 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\helper\file_updater;
+
+use phpbb\di\service_collection;
+use phpbb\install\exception\file_updater_failure_exception;
+
+/**
+ * File updater factory
+ */
+class factory
+{
+	/**
+	 * @var array
+	 */
+	protected $file_updaters;
+
+	/**
+	 * Constructor
+	 *
+	 * @param service_collection $collection	File updater service collection
+	 */
+	public function __construct(service_collection $collection)
+	{
+		foreach ($collection as $service)
+		{
+			$this->register($service);
+		}
+	}
+
+	/**
+	 * Register updater object
+	 *
+	 * @param file_updater_interface $updater	Updater object
+	 */
+	public function register(file_updater_interface $updater)
+	{
+		$name = $updater->get_method_name();
+		$this->file_updaters[$name] = $updater;
+	}
+
+	/**
+	 * Returns file updater object
+	 *
+	 * @param string $name	Name of the updater method
+	 *
+	 * @throws file_updater_failure_exception	When the specified file updater does not exist
+	 */
+	public function get($name)
+	{
+		if (!isset($this->file_updaters[$name]))
+		{
+			throw new file_updater_failure_exception();
+		}
+
+		return $this->file_updaters[$name];
+	}
+}
diff --git a/phpBB/phpbb/install/helper/file_updater/file_updater.php b/phpBB/phpbb/install/helper/file_updater/file_updater.php
new file mode 100644
index 0000000000..cc0f5c6b5f
--- /dev/null
+++ b/phpBB/phpbb/install/helper/file_updater/file_updater.php
@@ -0,0 +1,202 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\helper\file_updater;
+
+use phpbb\filesystem\exception\filesystem_exception;
+use phpbb\filesystem\filesystem;
+use phpbb\install\exception\file_updater_failure_exception;
+
+/**
+ * File updater for direct filesystem access
+ */
+class file_updater implements file_updater_interface
+{
+	/**
+	 * @var filesystem
+	 */
+	protected $filesystem;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * Constructor
+	 *
+	 * @param filesystem	$filesystem
+	 * @param string		$phpbb_root_path
+	 */
+	public function __construct(filesystem $filesystem, $phpbb_root_path)
+	{
+		$this->filesystem		= $filesystem;
+		$this->phpbb_root_path	= $phpbb_root_path;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 *
+	 * @throws file_updater_failure_exception	When the file is not writable
+	 * @throws filesystem_exception				When the filesystem class fails
+	 */
+	public function delete_file($path_to_file)
+	{
+		$this->filesystem->remove($this->phpbb_root_path . $path_to_file);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 *
+	 * @throws file_updater_failure_exception	When the file is not writable
+	 * @throws filesystem_exception				When the filesystem class fails
+	 */
+	public function create_new_file($path_to_file_to_create, $source, $create_from_content = false)
+	{
+		$path_to_file_to_create = $this->phpbb_root_path . $path_to_file_to_create;
+
+		$dir = dirname($path_to_file_to_create);
+		if (!$this->filesystem->exists($dir))
+		{
+			$this->make_dir($dir);
+		}
+
+		$original_dir_perms = false;
+
+		if (!$this->filesystem->is_writable($dir))
+		{
+			// Extract last 9 bits we actually need
+			$original_dir_perms = @fileperms($dir) & 511;
+			$this->filesystem->phpbb_chmod($dir, filesystem::CHMOD_ALL);
+		}
+
+		if (!$create_from_content)
+		{
+			try
+			{
+				$this->filesystem->copy($source, $path_to_file_to_create);
+			}
+			catch (filesystem_exception $e)
+			{
+				$this->write_file($path_to_file_to_create, $source, $create_from_content);
+			}
+		}
+		else
+		{
+			$this->write_file($path_to_file_to_create, $source, $create_from_content);
+		}
+
+		if ($original_dir_perms !== false)
+		{
+			$this->filesystem->phpbb_chmod($dir, $original_dir_perms);
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 *
+	 * @throws file_updater_failure_exception	When the file is not writable
+	 * @throws filesystem_exception				When the filesystem class fails
+	 */
+	public function update_file($path_to_file_to_update, $source, $create_from_content = false)
+	{
+		$path_to_file_to_update = $this->phpbb_root_path . $path_to_file_to_update;
+		$original_file_perms = false;
+
+		// Maybe necessary for binary files
+		$dir = dirname($path_to_file_to_update);
+		if (!$this->filesystem->exists($dir))
+		{
+			$this->make_dir($dir);
+		}
+
+		if (!$this->filesystem->is_writable($path_to_file_to_update))
+		{
+			// Extract last 9 bits we actually need
+			$original_file_perms = @fileperms($path_to_file_to_update) & 511;
+			$this->filesystem->phpbb_chmod($path_to_file_to_update, filesystem::CHMOD_WRITE);
+		}
+
+		if (!$create_from_content)
+		{
+			try
+			{
+				$this->filesystem->copy($source, $path_to_file_to_update, true);
+			}
+			catch (filesystem_exception $e)
+			{
+				$this->write_file($path_to_file_to_update, $source, $create_from_content);
+			}
+		}
+		else
+		{
+			$this->write_file($path_to_file_to_update, $source, $create_from_content);
+		}
+
+		if ($original_file_perms !== false)
+		{
+			$this->filesystem->phpbb_chmod($path_to_file_to_update, $original_file_perms);
+		}
+	}
+
+	/**
+	 * Creates directory structure
+	 *
+	 * @param string	$path	Path to the directory where the file should be placed (and non-existent)
+	 */
+	private function make_dir($path)
+	{
+		if (is_dir($path))
+		{
+			return;
+		}
+
+		$path = str_replace(DIRECTORY_SEPARATOR, '/', $path);
+		$this->filesystem->mkdir($path, 493); // 493 === 0755
+	}
+
+	/**
+	 * Fallback function for file writing
+	 *
+	 * @param string		$path_to_file			Path to the file's location
+	 * @param string		$source					Path to file to copy or string with the new file's content
+	 * @param bool|false	$create_from_content	Whether or not to use $source as the content, false by default
+	 *
+	 * @throws file_updater_failure_exception	When the file is not writable
+	 */
+	private function write_file($path_to_file, $source, $create_from_content = false)
+	{
+		if (!$create_from_content)
+		{
+			$source = @file_get_contents($source);
+		}
+
+		$file_pointer = @fopen($path_to_file, 'w');
+
+		if (!is_resource($file_pointer))
+		{
+			throw new file_updater_failure_exception();
+		}
+
+		@fwrite($file_pointer, $source);
+		@fclose($file_pointer);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_method_name()
+	{
+		return 'direct_file';
+	}
+}
diff --git a/phpBB/phpbb/install/helper/file_updater/file_updater_interface.php b/phpBB/phpbb/install/helper/file_updater/file_updater_interface.php
new file mode 100644
index 0000000000..b13d7c9fe1
--- /dev/null
+++ b/phpBB/phpbb/install/helper/file_updater/file_updater_interface.php
@@ -0,0 +1,49 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\helper\file_updater;
+
+interface file_updater_interface
+{
+	/**
+	 * Deletes a file
+	 *
+	 * @param string	$path_to_file	Path to the file to delete
+	 */
+	public function delete_file($path_to_file);
+
+	/**
+	 * Creates a new file
+	 *
+	 * @param string	$path_to_file_to_create	Path to the new file's location
+	 * @param string	$source					Path to file to copy or string with the new file's content
+	 * @param bool		$create_from_content	Whether or not to use $source as the content, false by default
+	 */
+	public function create_new_file($path_to_file_to_create, $source, $create_from_content = false);
+
+	/**
+	 * Update file
+	 *
+	 * @param string	$path_to_file_to_update	Path to the file's location
+	 * @param string	$source					Path to file to copy or string with the new file's content
+	 * @param bool		$create_from_content	Whether or not to use $source as the content, false by default
+	 */
+	public function update_file($path_to_file_to_update, $source, $create_from_content = false);
+
+	/**
+	 * Returns the name of the file updater method
+	 *
+	 * @return string
+	 */
+	public function get_method_name();
+}
diff --git a/phpBB/phpbb/install/helper/file_updater/ftp_file_updater.php b/phpBB/phpbb/install/helper/file_updater/ftp_file_updater.php
new file mode 100644
index 0000000000..5cdc331cbc
--- /dev/null
+++ b/phpBB/phpbb/install/helper/file_updater/ftp_file_updater.php
@@ -0,0 +1,136 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\helper\file_updater;
+
+use phpbb\install\helper\update_helper;
+
+/**
+ * File updater for FTP updates
+ */
+class ftp_file_updater implements file_updater_interface
+{
+	/**
+	 * @var \transfer
+	 */
+	protected $transfer;
+
+	/**
+	 * @var update_helper
+	 */
+	protected $update_helper;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * @var string
+	 */
+	protected $php_ext;
+
+	/**
+	 * Constructor
+	 *
+	 * @param update_helper	$update_helper
+	 * @param string		$phpbb_root_path
+	 * @param string		$php_ext
+	 */
+	public function __construct(update_helper $update_helper, $phpbb_root_path, $php_ext)
+	{
+		$this->transfer			= null;
+		$this->update_helper	= $update_helper;
+		$this->phpbb_root_path	= $phpbb_root_path;
+		$this->php_ext			= $php_ext;
+	}
+
+	/**
+	 * Initialize FTP connection
+	 *
+	 * @param string	$method
+	 * @param string	$host
+	 * @param string	$user
+	 * @param string	$pass
+	 * @param string	$path
+	 * @param int		$port
+	 * @param int		$timeout
+	 */
+	public function init($method, $host, $user, $pass, $path, $port, $timeout)
+	{
+		$this->update_helper->include_file('includes/functions_transfer.' . $this->php_ext);
+		$this->transfer = new $method($host, $user, $pass, $path, $port, $timeout);
+		$this->transfer->open_session();
+	}
+
+	/**
+	 * Close FTP session
+	 */
+	public function close()
+	{
+		$this->transfer->close_session();
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function delete_file($path_to_file)
+	{
+		$this->transfer->delete_file($path_to_file);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function create_new_file($path_to_file_to_create, $source, $create_from_content = false)
+	{
+		$dirname = dirname($path_to_file_to_create);
+
+		if ($dirname && !file_exists($this->phpbb_root_path . $dirname))
+		{
+			$this->transfer->make_dir($dirname);
+		}
+
+		if ($create_from_content)
+		{
+			$this->transfer->write_file($path_to_file_to_create, $source);
+		}
+		else
+		{
+			$this->transfer->copy_file($path_to_file_to_create, $source);
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function update_file($path_to_file_to_update, $source, $create_from_content = false)
+	{
+		if ($create_from_content)
+		{
+			$this->transfer->write_file($path_to_file_to_update, $source);
+		}
+		else
+		{
+			$this->transfer->copy_file($path_to_file_to_update, $source);
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_method_name()
+	{
+		return 'ftp';
+	}
+}
diff --git a/phpBB/phpbb/install/helper/install_helper.php b/phpBB/phpbb/install/helper/install_helper.php
new file mode 100644
index 0000000000..ffe36cd645
--- /dev/null
+++ b/phpBB/phpbb/install/helper/install_helper.php
@@ -0,0 +1,60 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\helper;
+
+/**
+ * General helper functionality for the installer
+ */
+class install_helper
+{
+	/**
+	 * @var string
+	 */
+	protected $php_ext;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * Constructor
+	 *
+	 * @param string	$phpbb_root_path	path to phpBB's root
+	 * @param string	$php_ext			Extension of PHP files
+	 */
+	public function __construct($phpbb_root_path, $php_ext)
+	{
+		$this->phpbb_root_path	= $phpbb_root_path;
+		$this->php_ext			= $php_ext;
+	}
+
+	/**
+	 * Check whether phpBB is installed.
+	 *
+	 * @return bool
+	 */
+	public function is_phpbb_installed()
+	{
+		$config_path = $this->phpbb_root_path . 'config.' . $this->php_ext;
+		$install_lock_path = $this->phpbb_root_path . 'cache/install_lock';
+
+		if (file_exists($config_path) && !file_exists($install_lock_path) && filesize($config_path))
+		{
+			return true;
+		}
+
+		return false;
+	}
+}
diff --git a/phpBB/phpbb/install/helper/iohandler/ajax_iohandler.php b/phpBB/phpbb/install/helper/iohandler/ajax_iohandler.php
new file mode 100644
index 0000000000..2a608f504e
--- /dev/null
+++ b/phpBB/phpbb/install/helper/iohandler/ajax_iohandler.php
@@ -0,0 +1,509 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\helper\iohandler;
+
+use phpbb\path_helper;
+use phpbb\routing\router;
+
+/**
+ * Input-Output handler for the AJAX frontend
+ */
+class ajax_iohandler extends iohandler_base
+{
+	/**
+	 * @var path_helper
+	 */
+	protected $path_helper;
+
+	/**
+	 * @var \phpbb\request\request_interface
+	 */
+	protected $request;
+
+	/**
+	 * @var \phpbb\template\template
+	 */
+	protected $template;
+
+	/**
+	 * @var router
+	 */
+	protected $router;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * @var string
+	 */
+	protected $file_status;
+
+	/**
+	 * @var string
+	 */
+	protected $form;
+
+	/**
+	 * @var bool
+	 */
+	protected $request_client_refresh;
+
+	/**
+	 * @var array
+	 */
+	protected $nav_data;
+
+	/**
+	 * @var array
+	 */
+	protected $cookies;
+
+	/**
+	 * @var array
+	 */
+	protected $download;
+
+	/**
+	 * @var array
+	 */
+	protected $redirect_url;
+
+	/**
+	 * @var resource
+	 */
+	protected $file_lock_pointer;
+
+	/**
+	 * Constructor
+	 *
+	 * @param path_helper						$path_helper
+	 * @param \phpbb\request\request_interface	$request	HTTP request interface
+	 * @param \phpbb\template\template			$template	Template engine
+	 * @param router 							$router		Router
+	 * @param string 							$root_path	Path to phpBB's root
+	 */
+	public function __construct(path_helper $path_helper, \phpbb\request\request_interface $request, \phpbb\template\template $template, router $router, $root_path)
+	{
+		$this->path_helper = $path_helper;
+		$this->request	= $request;
+		$this->router	= $router;
+		$this->template	= $template;
+		$this->form		= '';
+		$this->nav_data	= array();
+		$this->cookies	= array();
+		$this->download	= array();
+		$this->redirect_url = array();
+		$this->file_status = '';
+		$this->phpbb_root_path = $root_path;
+
+		parent::__construct();
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_input($name, $default, $multibyte = false)
+	{
+		return $this->request->variable($name, $default, $multibyte);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_raw_input($name, $default)
+	{
+		return $this->request->raw_variable($name, $default);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_server_variable($name, $default = '')
+	{
+		return $this->request->server($name, $default);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_header_variable($name, $default = '')
+	{
+		return $this->request->header($name, $default);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function is_secure()
+	{
+		return $this->request->is_secure();
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function add_user_form_group($title, $form)
+	{
+		$this->form = $this->generate_form_render_data($title, $form);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function generate_form_render_data($title, $form)
+	{
+		$this->template->assign_block_vars('options', array(
+			'LEGEND'	=> $this->language->lang($title),
+			'S_LEGEND'	=> true,
+		));
+
+		$not_button_form = false;
+
+		foreach ($form as $input_name => $input_options)
+		{
+			if (!isset($input_options['type']))
+			{
+				continue;
+			}
+
+			$tpl_ary = array();
+			$not_button_form = ($input_options['type'] !== 'submit' || $not_button_form);
+
+			$tpl_ary['TYPE'] = $input_options['type'];
+			$tpl_ary['TITLE'] = $this->language->lang($input_options['label']);
+			$tpl_ary['KEY'] = $input_name;
+			$tpl_ary['S_EXPLAIN'] = false;
+			$tpl_ary['DISABLED'] = isset($input_options['disabled']) ? $input_options['disabled'] : false;
+			$tpl_ary['IS_SECONDARY'] = isset($input_options['is_secondary']) ? $input_options['is_secondary'] : false;
+
+			if (isset($input_options['default']))
+			{
+				$default = $input_options['default'];
+				$default = preg_replace_callback('#\{L_([A-Z0-9\-_]*)\}#s', array($this, 'lang_replace_callback'), $default);
+				$tpl_ary['DEFAULT'] = $default;
+			}
+
+			if (isset($input_options['description']))
+			{
+				$tpl_ary['TITLE_EXPLAIN'] = $this->language->lang($input_options['description']);
+				$tpl_ary['S_EXPLAIN'] = true;
+			}
+
+			if (in_array($input_options['type'], array('select', 'radio'), true))
+			{
+				for ($i = 0, $total = count($input_options['options']); $i < $total; $i++)
+				{
+					if (isset($input_options['options'][$i]['label']))
+					{
+						$input_options['options'][$i]['label'] = $this->language->lang($input_options['options'][$i]['label']);
+					}
+				}
+
+				$tpl_ary['OPTIONS'] = $input_options['options'];
+			}
+
+			$block_name = ($input_options['type'] === 'submit') ? 'submit_buttons' : 'options';
+			$this->template->assign_block_vars($block_name, $tpl_ary);
+		}
+
+		if (isset($form['database_update_submit']) && !$form['database_update_submit']['disabled'])
+		{
+			$this->template->assign_var('FORM_TITLE', $this->language->lang('UPDATE_CONTINUE_UPDATE_PROCESS'));
+		}
+
+		$this->template->assign_var('S_NOT_ONLY_BUTTON_FORM', $not_button_form);
+
+		if (!$not_button_form)
+		{
+			$this->template->destroy_block_vars('options');
+		}
+
+		$this->template->set_filenames(array(
+			'form_install' => 'installer_form.html',
+		));
+
+		return $this->template->assign_display('form_install');
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function send_response($no_more_output = false)
+	{
+		$json_data_array = $this->prepare_json_array($no_more_output);
+
+		if (empty($json_data_array))
+		{
+			return;
+		}
+
+		$json_data = json_encode($json_data_array);
+
+		// Try to push content to the browser
+		print(str_pad(' ', 4096) . "\n");
+		print($json_data . "\n\n");
+		flush();
+	}
+
+	/**
+	 * Prepares iohandler's data to be sent out to the client.
+	 *
+	 * @param bool	$no_more_output	Whether or not there will be more output in this response
+	 *
+	 * @return array
+	 */
+	protected function prepare_json_array($no_more_output = false)
+	{
+		$json_array = array();
+
+		if (!empty($this->errors))
+		{
+			$json_array['errors'] = $this->errors;
+			$this->errors = array();
+		}
+
+		if (!empty($this->warnings))
+		{
+			$json_array['warnings'] = $this->warnings;
+			$this->warnings = array();
+		}
+
+		if (!empty($this->logs))
+		{
+			$json_array['logs'] = $this->logs;
+			$this->logs = array();
+		}
+
+		if (!empty($this->success))
+		{
+			$json_array['success'] = $this->success;
+			$this->success = array();
+		}
+
+		if (!empty($this->download))
+		{
+			$json_array['download'] = $this->download;
+			$this->download = array();
+		}
+
+		if (!empty($this->form))
+		{
+			$json_array['form'] = $this->form;
+			$this->form = '';
+		}
+
+		if (!empty($this->file_status))
+		{
+			$json_array['file_status'] = $this->file_status;
+			$this->file_status = '';
+		}
+
+		// If current task name is set, we push progress message to the client side
+		if (!empty($this->current_task_name))
+		{
+			$json_array['progress'] = array(
+				'task_name'		=> $this->current_task_name,
+				'task_num'		=> $this->current_task_progress,
+				'task_count'	=> $this->task_progress_count,
+			);
+
+			if ($this->restart_progress_bar)
+			{
+				$json_array['progress']['restart'] = 1;
+				$this->restart_progress_bar = false;
+			}
+		}
+
+		if (!empty($this->nav_data))
+		{
+			$json_array['nav'] = $this->nav_data;
+			$this->nav_data = array();
+		}
+
+		if ($this->request_client_refresh)
+		{
+			$json_array['refresh'] = true;
+			$this->request_client_refresh = false;
+		}
+
+		if (!empty($this->cookies))
+		{
+			$json_array['cookies'] = $this->cookies;
+			$this->cookies = array();
+		}
+
+		if (!empty($this->redirect_url))
+		{
+			$json_array['redirect'] = $this->redirect_url;
+			$this->redirect_url = array();
+		}
+
+		if ($no_more_output)
+		{
+			$json_array['over'] = true;
+		}
+
+		return $json_array;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function set_progress($task_lang_key, $task_number)
+	{
+		parent::set_progress($task_lang_key, $task_number);
+		$this->send_response();
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function request_refresh()
+	{
+		$this->request_client_refresh = true;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function set_active_stage_menu($menu_path)
+	{
+		$this->nav_data['active'] = $menu_path[count($menu_path) - 1];
+		$this->send_response();
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function set_finished_stage_menu($menu_path)
+	{
+		$this->nav_data['finished'][] = $menu_path[count($menu_path) - 1];
+		$this->send_response();
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function set_cookie($cookie_name, $cookie_value)
+	{
+		$this->cookies[] = array(
+			'name' => $cookie_name,
+			'value' => $cookie_value
+		);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function add_download_link($route, $title, $msg = null)
+	{
+		$link_properties = array(
+			'href'	=> $this->router->generate($route),
+			'title'	=> $this->language->lang($title),
+			'download' => $this->language->lang('DOWNLOAD'),
+		);
+
+		if ($msg !== null)
+		{
+			$link_properties['msg'] = htmlspecialchars_decode($this->language->lang($msg));
+		}
+
+		$this->download[] = $link_properties;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function render_update_file_status($status_array)
+	{
+		$this->template->assign_vars(array(
+			'T_IMAGE_PATH'	=> $this->path_helper->get_web_root_path() . 'adm/images/',
+		));
+
+		foreach ($status_array as $block => $list)
+		{
+			foreach ($list as $filename)
+			{
+				$dirname = dirname($filename);
+
+				$this->template->assign_block_vars($block, array(
+					'STATUS'			=> $block,
+					'FILENAME'			=> $filename,
+					'DIR_PART'			=> (!empty($dirname) && $dirname !== '.') ? dirname($filename) . '/' : false,
+					'FILE_PART'			=> basename($filename),
+				));
+			}
+		}
+
+		$this->template->set_filenames(array(
+			'file_status' => 'installer_update_file_status.html',
+		));
+
+		$this->file_status = $this->template->assign_display('file_status');
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function redirect($url, $use_ajax = false)
+	{
+		$this->redirect_url = array('url' => $url, 'use_ajax' => $use_ajax);
+		$this->send_response(true);
+	}
+
+	/**
+	 * Acquires a file lock
+	 */
+	public function acquire_lock()
+	{
+		$lock_file = $this->phpbb_root_path . 'store/io_lock.lock';
+		$this->file_lock_pointer = @fopen($lock_file, 'w+');
+
+		if ($this->file_lock_pointer)
+		{
+			flock($this->file_lock_pointer, LOCK_EX);
+		}
+	}
+
+	/**
+	 * Release file lock
+	 */
+	public function release_lock()
+	{
+		if ($this->file_lock_pointer)
+		{
+			fwrite($this->file_lock_pointer, 'ok');
+			flock($this->file_lock_pointer, LOCK_UN);
+			fclose($this->file_lock_pointer);
+		}
+	}
+
+	/**
+	 * Callback function for language replacing
+	 *
+	 * @param array	$matches
+	 * @return string
+	 */
+	public function lang_replace_callback($matches)
+	{
+		if (!empty($matches[1]))
+		{
+			return $this->language->lang($matches[1]);
+		}
+
+		return '';
+	}
+}
diff --git a/phpBB/phpbb/install/helper/iohandler/cli_iohandler.php b/phpBB/phpbb/install/helper/iohandler/cli_iohandler.php
new file mode 100644
index 0000000000..4117a3dfd3
--- /dev/null
+++ b/phpBB/phpbb/install/helper/iohandler/cli_iohandler.php
@@ -0,0 +1,323 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\helper\iohandler;
+
+use phpbb\install\exception\installer_exception;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\OutputStyle;
+
+/**
+ * Input-Output handler for the CLI frontend
+ */
+class cli_iohandler extends iohandler_base
+{
+	/**
+	 * @var OutputInterface
+	 */
+	protected $output;
+
+	/**
+	 * @var OutputStyle
+	 */
+	protected $io;
+
+	/**
+	 * @var array
+	 */
+	protected $input_values = array();
+
+	/**
+	 * @var \Symfony\Component\Console\Helper\ProgressBar
+	 */
+	protected $progress_bar;
+
+	/**
+	 * Set the style and output used to display feedback;
+	 *
+	 * @param OutputStyle 		$style
+	 * @param OutputInterface	$output
+	 */
+	public function set_style(OutputStyle $style, OutputInterface $output)
+	{
+		$this->io = $style;
+		$this->output = $output;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_input($name, $default, $multibyte = false)
+	{
+		$result = $default;
+
+		if (isset($this->input_values[$name]))
+		{
+			$result = $this->input_values[$name];
+		}
+
+		if ($multibyte)
+		{
+			return utf8_normalize_nfc($result);
+		}
+
+		return $result;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_raw_input($name, $default)
+	{
+		return $this->get_input($name, $default, true);
+	}
+
+	/**
+	 * Set input variable
+	 *
+	 * @param string $name Name of input variable
+	 * @param mixed $value Value of input variable
+	 */
+	public function set_input($name, $value)
+	{
+		$this->input_values[$name] = $value;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_server_variable($name, $default = '')
+	{
+		return $default;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_header_variable($name, $default = '')
+	{
+		return $default;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function is_secure()
+	{
+		return false;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function add_user_form_group($title, $form)
+	{
+		throw new installer_exception('MISSING_DATA');
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function send_response($no_more_output = false)
+	{
+	}
+
+	/**
+	 * {@inheritdoc
+	 */
+	public function add_error_message($error_title, $error_description = false)
+	{
+		$this->io->newLine();
+		$message = $this->translate_message($error_title, $error_description);
+		$message_string = $message['title'] . (!empty($message['description']) ? "\n" . $message['description'] : '');
+
+		if (strpos($message_string, '<br />') !== false)
+		{
+			$message_string = strip_tags(str_replace('<br />', "\n", $message_string));
+		}
+
+		$this->io->error($message_string);
+
+		if ($this->progress_bar !== null)
+		{
+			$this->io->newLine(2);
+			$this->progress_bar->display();
+		}
+	}
+
+	/**
+	 * {@inheritdoc
+	 */
+	public function add_warning_message($warning_title, $warning_description = false)
+	{
+		$this->io->newLine();
+
+		$message = $this->translate_message($warning_title, $warning_description);
+		$message_string = $message['title'] . (!empty($message['description']) ? "\n" . $message['description'] : '');
+		$this->io->warning($message_string);
+
+		if ($this->progress_bar !== null)
+		{
+			$this->io->newLine(2);
+			$this->progress_bar->display();
+		}
+	}
+
+	/**
+	 * {@inheritdoc
+	 */
+	public function add_log_message($log_title, $log_description = false)
+	{
+		if ($this->output->getVerbosity() > OutputInterface::VERBOSITY_NORMAL)
+		{
+			$message = $this->translate_message($log_title, $log_description);
+			$this->output->writeln(sprintf('[%3d/%-3d] ---- %s', $this->current_task_progress, $this->task_progress_count, $message['title']));
+		}
+	}
+
+	/**
+	 * {@inheritdoc
+	 */
+	public function add_success_message($error_title, $error_description = false)
+	{
+		$this->io->newLine();
+
+		$message = $this->translate_message($error_title, $error_description);
+		$message_string = $message['title'] . (!empty($message['description']) ? "\n" . $message['description'] : '');
+		$this->io->success($message_string);
+
+		if ($this->progress_bar !== null)
+		{
+			$this->io->newLine(2);
+			$this->progress_bar->display();
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function set_task_count($task_count, $restart = false)
+	{
+		parent::set_task_count($task_count, $restart);
+
+		if ($this->output->getVerbosity() === OutputInterface::VERBOSITY_NORMAL)
+		{
+			if ($this->progress_bar !== null)
+			{
+				// Symfony's ProgressBar is immutable regarding task_count, so delete the old and create a new one.
+				$this->progress_bar->clear();
+			}
+			else
+			{
+				$this->io->newLine(2);
+			}
+
+			$this->progress_bar = $this->io->createProgressBar($task_count);
+			$this->progress_bar->setFormat(
+				"    %current:3s%/%max:-3s% %bar%  %percent:3s%%\n" .
+				"             %message%\n");
+			$this->progress_bar->setBarWidth(60);
+
+			if (!defined('PHP_WINDOWS_VERSION_BUILD'))
+			{
+				$this->progress_bar->setEmptyBarCharacter('░'); // light shade character \u2591
+				$this->progress_bar->setProgressCharacter('');
+				$this->progress_bar->setBarCharacter('▓'); // dark shade character \u2593
+			}
+
+			$this->progress_bar->setMessage('');
+			$this->progress_bar->start();
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function set_progress($task_lang_key, $task_number)
+	{
+		parent::set_progress($task_lang_key, $task_number);
+
+		if ($this->progress_bar !== null)
+		{
+			$this->progress_bar->setProgress($this->current_task_progress);
+			$this->progress_bar->setMessage($this->current_task_name);
+		}
+		else
+		{
+			$this->output->writeln(sprintf('[%3d/%-3d] %s', $this->current_task_progress, $this->task_progress_count, $this->current_task_name));
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function finish_progress($message_lang_key)
+	{
+		parent::finish_progress($message_lang_key);
+
+		if ($this->progress_bar !== null)
+		{
+			$this->progress_bar->finish();
+			$this->progress_bar = null;
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function request_refresh()
+	{
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function set_active_stage_menu($menu_path)
+	{
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function set_finished_stage_menu($menu_path)
+	{
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function set_cookie($cookie_name, $cookie_value)
+	{
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function add_download_link($route, $title, $msg = null)
+	{
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function render_update_file_status($status_array)
+	{
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function redirect($url, $use_ajax = false)
+	{
+	}
+}
diff --git a/phpBB/phpbb/install/helper/iohandler/exception/iohandler_not_implemented_exception.php b/phpBB/phpbb/install/helper/iohandler/exception/iohandler_not_implemented_exception.php
new file mode 100644
index 0000000000..f2ddeda6f7
--- /dev/null
+++ b/phpBB/phpbb/install/helper/iohandler/exception/iohandler_not_implemented_exception.php
@@ -0,0 +1,19 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\helper\iohandler\exception;
+
+class iohandler_not_implemented_exception extends \Exception
+{
+
+}
diff --git a/phpBB/phpbb/install/helper/iohandler/factory.php b/phpBB/phpbb/install/helper/iohandler/factory.php
new file mode 100644
index 0000000000..1e8395760a
--- /dev/null
+++ b/phpBB/phpbb/install/helper/iohandler/factory.php
@@ -0,0 +1,79 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\helper\iohandler;
+
+use phpbb\install\helper\iohandler\exception\iohandler_not_implemented_exception;
+
+/**
+ * Input-output handler factory
+ */
+class factory
+{
+	/**
+	 * @var \Symfony\Component\DependencyInjection\ContainerInterface
+	 */
+	protected $container;
+
+	/**
+	 * @var string
+	 */
+	protected $environment;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \Symfony\Component\DependencyInjection\ContainerInterface $container Dependency injection container
+	 */
+	public function __construct(\Symfony\Component\DependencyInjection\ContainerInterface $container)
+	{
+		$this->container	= $container;
+		$this->environment	= null;
+	}
+
+	/**
+	 * @param string	$environment	The name of the input-output handler to use
+	 */
+	public function set_environment($environment)
+	{
+		$this->environment = $environment;
+	}
+
+	/**
+	 * Factory getter for iohandler
+	 *
+	 * @return \phpbb\install\helper\iohandler\iohandler_interface
+	 *
+	 * @throws \phpbb\install\helper\iohandler\exception\iohandler_not_implemented_exception
+	 * 		When the specified iohandler_interface does not exists
+	 */
+	public function get()
+	{
+		switch ($this->environment)
+		{
+			case 'ajax':
+				return $this->container->get('installer.helper.iohandler_ajax');
+			break;
+			case 'nojs':
+				// @todo replace this
+				return $this->container->get('installer.helper.iohandler_ajax');
+			break;
+			case 'cli':
+				return $this->container->get('installer.helper.iohandler_cli');
+			break;
+			default:
+				throw new iohandler_not_implemented_exception();
+			break;
+		}
+	}
+}
diff --git a/phpBB/phpbb/install/helper/iohandler/iohandler_base.php b/phpBB/phpbb/install/helper/iohandler/iohandler_base.php
new file mode 100644
index 0000000000..1797a6c9ad
--- /dev/null
+++ b/phpBB/phpbb/install/helper/iohandler/iohandler_base.php
@@ -0,0 +1,209 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\helper\iohandler;
+
+/**
+ * Base class for installer input-output handlers
+ */
+abstract class iohandler_base implements iohandler_interface
+{
+	/**
+	 * Array of errors
+	 *
+	 * Errors should be added, when the installation cannot continue without
+	 * user interaction. If the aim is to notify the user about something, please
+	 * use a warning instead.
+	 *
+	 * @var array
+	 */
+	protected $errors;
+
+	/**
+	 * Array of warnings
+	 *
+	 * @var array
+	 */
+	protected $warnings;
+
+	/**
+	 * Array of logs
+	 *
+	 * @var array
+	 */
+	protected $logs;
+
+	/**
+	 * Array of success messages
+	 *
+	 * @var array
+	 */
+	protected $success;
+
+	/**
+	 * @var \phpbb\language\language
+	 */
+	protected $language;
+
+	/**
+	 * @var int
+	 */
+	protected $task_progress_count;
+
+	/**
+	 * @var int
+	 */
+	protected $current_task_progress;
+
+	/**
+	 * @var string
+	 */
+	protected $current_task_name;
+
+	/**
+	 * @var bool
+	 */
+	protected $restart_progress_bar;
+
+	/**
+	 * Constructor
+	 */
+	public function __construct()
+	{
+		$this->errors	= array();
+		$this->warnings	= array();
+		$this->logs		= array();
+		$this->success	= array();
+
+		$this->restart_progress_bar		= false;
+		$this->task_progress_count		= 0;
+		$this->current_task_progress	= 0;
+		$this->current_task_name		= '';
+	}
+
+	/**
+	 * Set language service
+	 *
+	 * @param \phpbb\language\language $language
+	 */
+	public function set_language(\phpbb\language\language $language)
+	{
+		$this->language = $language;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function add_error_message($error_title, $error_description = false)
+	{
+		if (!is_array($error_title) && strpos($error_title, '<br />') !== false)
+		{
+			$error_title = strip_tags(htmlspecialchars_decode($error_title));
+		}
+		$this->errors[] = $this->translate_message($error_title, $error_description);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function add_warning_message($warning_title, $warning_description = false)
+	{
+		$this->warnings[] = $this->translate_message($warning_title, $warning_description);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function add_log_message($log_title, $log_description = false)
+	{
+		$this->logs[] = $this->translate_message($log_title, $log_description);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function add_success_message($success_title, $success_description = false)
+	{
+		$this->success[] = $this->translate_message($success_title, $success_description);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function set_task_count($task_count, $restart = false)
+	{
+		$this->task_progress_count = $task_count;
+		$this->restart_progress_bar = $restart;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function set_progress($task_lang_key, $task_number)
+	{
+		$this->current_task_name = '';
+
+		if (!empty($task_lang_key))
+		{
+			$this->current_task_name = $this->language->lang($task_lang_key);
+		}
+
+		$this->current_task_progress = $task_number;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function finish_progress($message_lang_key)
+	{
+		if (!empty($message_lang_key))
+		{
+			$this->current_task_name = $this->language->lang($message_lang_key);
+		}
+
+		$this->current_task_progress = $this->task_progress_count;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function generate_form_render_data($title, $form)
+	{
+		return '';
+	}
+
+	/**
+	 * Localize message.
+	 *
+	 * Note: When an array is passed into the parameters below, it will be
+	 * resolved as printf($param[0], $param[1], ...).
+	 *
+	 * @param array|string		$title			Title of the message
+	 * @param array|string|bool	$description	Description of the message
+	 *
+	 * @return array	Localized message in an array
+	 */
+	protected function translate_message($title, $description)
+	{
+		$message_array = array();
+
+		$message_array['title'] = call_user_func_array(array($this->language, 'lang'), (array) $title);
+
+		if ($description !== false)
+		{
+			$message_array['description'] = call_user_func_array(array($this->language, 'lang'), (array) $description);
+		}
+
+		return $message_array;
+	}
+}
diff --git a/phpBB/phpbb/install/helper/iohandler/iohandler_interface.php b/phpBB/phpbb/install/helper/iohandler/iohandler_interface.php
new file mode 100644
index 0000000000..440748901c
--- /dev/null
+++ b/phpBB/phpbb/install/helper/iohandler/iohandler_interface.php
@@ -0,0 +1,222 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\helper\iohandler;
+
+/**
+ * Input-Output handler interface for the installer
+ */
+interface iohandler_interface
+{
+	/**
+	 * Renders or returns response message
+	 *
+	 * @param bool	$no_more_output	Whether or not there will be more output in this output unit
+	 */
+	public function send_response($no_more_output = false);
+
+	/**
+	 * Returns input variable
+	 *
+	 * @param string	$name		Name of the input variable to obtain
+	 * @param mixed		$default	A default value that is returned if the variable was not set.
+	 * 								This function will always return a value of the same type as the default.
+	 * @param bool		$multibyte	If $default is a string this paramater has to be true if the variable may contain any UTF-8 characters
+	 *								Default is false, causing all bytes outside the ASCII range (0-127) to be replaced with question marks
+	 *
+	 * @return mixed	Value of the input variable
+	 */
+	public function get_input($name, $default, $multibyte = false);
+
+	/**
+	 * Returns raw input variable
+	 *
+	 * @param string	$name		Name of the input variable to obtain
+	 * @param mixed		$default	A default value that is returned if the variable was not set.
+	 * 								This function will always return a value of the same type as the default.
+	 *
+	 * @return mixed	Value of the raw input variable
+	 */
+	public function get_raw_input($name, $default);
+
+	/**
+	 * Returns server variable
+	 *
+	 * This function should work the same as request_interface::server().
+	 *
+	 * @param string	$name		Name of the server variable
+	 * @param mixed		$default	Default value to return when the requested variable does not exist
+	 *
+	 * @return mixed	Value of the server variable
+	 */
+	public function get_server_variable($name, $default = '');
+
+	/**
+	 * Wrapper function for request_interface::header()
+	 *
+	 * @param string	$name		Name of the request header variable
+	 * @param mixed		$default	Default value to return when the requested variable does not exist
+	 *
+	 * @return mixed
+	 */
+	public function get_header_variable($name, $default = '');
+
+	/**
+	 * Returns true if the connection is encrypted
+	 *
+	 * @return bool
+	 */
+	public function is_secure();
+
+	/**
+	 * Adds an error message to the rendering queue
+	 *
+	 * Note: When an array is passed into the parameters below, it will be
+	 * resolved as printf($param[0], $param[1], ...).
+	 *
+	 * @param string|array		$error_title		Title of the error message.
+	 * @param string|bool|array	$error_description	Description of the error (and possibly guidelines to resolve it),
+	 * 												or false if the error description is not available.
+	 */
+	public function add_error_message($error_title, $error_description = false);
+
+	/**
+	 * Adds a warning message to the rendering queue
+	 *
+	 * Note: When an array is passed into the parameters below, it will be
+	 * resolved as printf($param[0], $param[1], ...).
+	 *
+	 * @param string|array		$warning_title			Title of the warning message
+	 * @param string|bool|array	$warning_description	Description of the warning (and possibly guidelines to resolve it),
+	 * 													or false if the warning description is not available
+	 */
+	public function add_warning_message($warning_title, $warning_description = false);
+
+	/**
+	 * Adds a log message to the rendering queue
+	 *
+	 * Note: When an array is passed into the parameters below, it will be
+	 * resolved as printf($param[0], $param[1], ...).
+	 *
+	 * @param string|array		$log_title			Title of the log message
+	 * @param string|bool|array	$log_description	Description of the log,
+	 * 												or false if the log description is not available
+	 */
+	public function add_log_message($log_title, $log_description = false);
+
+	/**
+	 * Adds a success message to the rendering queue
+	 *
+	 * Note: When an array is passed into the parameters below, it will be
+	 * resolved as printf($param[0], $param[1], ...).
+	 *
+	 * @param string|array		$success_title			Title of the success message
+	 * @param string|bool|array	$success_description	Description of the success,
+	 * 													or false if the success description is not available
+	 *
+	 * @return null
+	 */
+	public function add_success_message($success_title, $success_description = false);
+
+	/**
+	 * Adds a requested data group to the rendering queue
+	 *
+	 * @param string	$title	Language variable with the title of the form
+	 * @param array		$form	An array describing the required data (options etc)
+	 */
+	public function add_user_form_group($title, $form);
+
+	/**
+	 * Returns the rendering information for the form
+	 *
+	 * @param string	$title	Language variable with the title of the form
+	 * @param array		$form	An array describing the required data (options etc)
+	 *
+	 * @return string	Information to render the form
+	 */
+	public function generate_form_render_data($title, $form);
+
+	/**
+	 * Sets the number of tasks belonging to the installer in the current mode.
+	 *
+	 * @param int	$task_count	Number of tasks
+	 * @param bool	$restart	Whether or not to restart the progress bar, false by default
+	 */
+	public function set_task_count($task_count, $restart = false);
+
+	/**
+	 * Sets the progress information
+	 *
+	 * @param string	$task_lang_key	Language key for the name of the task
+	 * @param int		$task_number	Position of the current task in the task queue
+	 */
+	public function set_progress($task_lang_key, $task_number);
+
+	/**
+	 * Sends refresh request to the client
+	 */
+	public function request_refresh();
+
+	/**
+	 * Marks stage as active in the navigation bar
+	 *
+	 * @param array	$menu_path	Array to the navigation elem
+	 */
+	public function set_active_stage_menu($menu_path);
+
+	/**
+	 * Marks stage as completed in the navigation bar
+	 *
+	 * @param array	$menu_path	Array to the navigation elem
+	 */
+	public function set_finished_stage_menu($menu_path);
+
+	/**
+	 * Finish the progress bar
+	 *
+	 * @param string	$message_lang_key	Language key for the message
+	 */
+	public function finish_progress($message_lang_key);
+
+	/**
+	 * Adds a download link
+	 *
+	 * @param string			$route	Route for the link
+	 * @param string			$title	Language key for the title
+	 * @param string|null|array	$msg	Language key for the message
+	 */
+	public function add_download_link($route, $title, $msg = null);
+
+	/**
+	 * Redirects the user to a new page
+	 *
+	 * @param string	$url		URL to redirect to
+	 * @param bool		$use_ajax	Whether or not to use AJAX redirect
+	 */
+	public function redirect($url, $use_ajax = false);
+
+	/**
+	 * Renders the status of update files
+	 *
+	 * @param array	$status_array	Array containing files in groups to render
+	 */
+	public function render_update_file_status($status_array);
+
+	/**
+	 * Sends and sets cookies
+	 *
+	 * @param string	$cookie_name	Name of the cookie to set
+	 * @param string	$cookie_value	Value of the cookie to set
+	 */
+	public function set_cookie($cookie_name, $cookie_value);
+}
diff --git a/phpBB/phpbb/install/helper/navigation/convertor_navigation.php b/phpBB/phpbb/install/helper/navigation/convertor_navigation.php
new file mode 100644
index 0000000000..54cab83b1d
--- /dev/null
+++ b/phpBB/phpbb/install/helper/navigation/convertor_navigation.php
@@ -0,0 +1,78 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\helper\navigation;
+
+use phpbb\install\helper\install_helper;
+
+class convertor_navigation implements navigation_interface
+{
+	/**
+	 * @var install_helper
+	 */
+	private $install_helper;
+
+	/**
+	 * Constructor
+	 *
+	 * @param install_helper	$install_helper
+	 */
+	public function __construct(install_helper $install_helper)
+	{
+		$this->install_helper = $install_helper;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get()
+	{
+		if (!$this->install_helper->is_phpbb_installed())
+		{
+			return array();
+		}
+
+		return array(
+			'convert'	=> array(
+				'label'	=> 'CONVERT',
+				'route'	=> 'phpbb_convert_intro',
+				'order'	=> 3,
+				array(
+					'intro'	=> array(
+						'label'	=> 'SUB_INTRO',
+						'stage'	=> true,
+						'order'	=> 0,
+					),
+					'settings'	=> array(
+						'label'	=> 'STAGE_SETTINGS',
+						'stage'	=> true,
+						'route'	=> 'phpbb_convert_settings',
+						'order'	=> 1,
+					),
+					'convert'	=> array(
+						'label'	=> 'STAGE_IN_PROGRESS',
+						'stage'	=> true,
+						'route'	=> 'phpbb_convert_convert',
+						'order'	=> 2,
+					),
+					'finish'	=> array(
+						'label'	=> 'CONVERT_COMPLETE',
+						'stage'	=> true,
+						'route'	=> 'phpbb_convert_finish',
+						'order'	=> 3,
+					),
+				),
+			),
+		);
+	}
+}
diff --git a/phpBB/phpbb/install/helper/navigation/install_navigation.php b/phpBB/phpbb/install/helper/navigation/install_navigation.php
new file mode 100644
index 0000000000..f690f8de76
--- /dev/null
+++ b/phpBB/phpbb/install/helper/navigation/install_navigation.php
@@ -0,0 +1,75 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\helper\navigation;
+
+use phpbb\install\helper\install_helper;
+
+class install_navigation implements navigation_interface
+{
+	/**
+	 * @var install_helper
+	 */
+	private $install_helper;
+
+	/**
+	 * Constructor
+	 *
+	 * @param install_helper	$install_helper
+	 */
+	public function __construct(install_helper $install_helper)
+	{
+		$this->install_helper = $install_helper;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get()
+	{
+		if ($this->install_helper->is_phpbb_installed())
+		{
+			return array();
+		}
+
+		return array(
+			'install'	=> array(
+				'label'	=> 'INSTALL',
+				'route'	=> 'phpbb_installer_install',
+				'order'	=> 1,
+				array(
+					'introduction'	=> array(
+						'label'	=> 'INTRODUCTION_TITLE',
+						'stage'	=> true,
+						'order'	=> 0,
+					),
+					'requirements'	=> array(
+						'label'	=> 'STAGE_REQUIREMENTS',
+						'stage'	=> true,
+						'order'	=> 1,
+					),
+					'obtain_data'	=> array(
+						'label'	=> 'STAGE_OBTAIN_DATA',
+						'stage'	=> true,
+						'order'	=> 2,
+					),
+					'install'	=> array(
+						'label'	=> 'STAGE_INSTALL',
+						'stage'	=> true,
+						'order'	=> 3,
+					),
+				),
+			),
+		);
+	}
+}
diff --git a/phpBB/phpbb/install/helper/navigation/main_navigation.php b/phpBB/phpbb/install/helper/navigation/main_navigation.php
new file mode 100644
index 0000000000..214bb04963
--- /dev/null
+++ b/phpBB/phpbb/install/helper/navigation/main_navigation.php
@@ -0,0 +1,48 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\helper\navigation;
+
+class main_navigation implements navigation_interface
+{
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get()
+	{
+		return array(
+			'overview'	=> array(
+				'label'	=> 'MENU_OVERVIEW',
+				'route'	=> 'phpbb_installer_index',
+				'order'	=> 0,
+				array(
+					'introduction'	=> array(
+						'label'	=> 'MENU_INTRO',
+						'route'	=> 'phpbb_installer_index',
+						'order'	=> 0,
+					),
+					'support'	=> array(
+						'label'	=> 'MENU_SUPPORT',
+						'route'	=> 'phpbb_installer_support',
+						'order'	=> 1,
+					),
+					'license'	=> array(
+						'label'	=> 'MENU_LICENSE',
+						'route'	=> 'phpbb_installer_license',
+						'order'	=> 2,
+					),
+				),
+			),
+		);
+	}
+}
diff --git a/phpBB/phpbb/install/helper/navigation/navigation_interface.php b/phpBB/phpbb/install/helper/navigation/navigation_interface.php
new file mode 100644
index 0000000000..eebdbe923f
--- /dev/null
+++ b/phpBB/phpbb/install/helper/navigation/navigation_interface.php
@@ -0,0 +1,43 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\helper\navigation;
+
+/**
+ * Interface for installer's navigation defining services
+ */
+interface navigation_interface
+{
+	/**
+	 * Returns an array with the navigation items
+	 *
+	 * The returned array should have the following format:
+	 * <code>
+	 * array(
+	 * 	'parent_nav_name' => array(
+	 * 		'nav_name' => array(
+	 * 			'label' => 'MY_MENU',
+	 * 			'route' => 'phpbb_route_name',
+	 * 		)
+	 * 	)
+	 * )
+	 * </code>
+	 *
+	 * Navigation item setting options:
+	 * 	- label: The language variable name
+	 * 	- route: Name of the route which it is belongs to
+	 *
+	 * @return array
+	 */
+	public function get();
+}
diff --git a/phpBB/phpbb/install/helper/navigation/navigation_provider.php b/phpBB/phpbb/install/helper/navigation/navigation_provider.php
new file mode 100644
index 0000000000..d52aec8999
--- /dev/null
+++ b/phpBB/phpbb/install/helper/navigation/navigation_provider.php
@@ -0,0 +1,121 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\helper\navigation;
+
+use phpbb\di\service_collection;
+
+/**
+ * Installers navigation provider
+ */
+class navigation_provider
+{
+	/**
+	 * @var array
+	 */
+	private $menu_collection;
+
+	/**
+	 * Constructor
+	 *
+	 * @param service_collection		$plugins
+	 */
+	public function __construct(service_collection $plugins)
+	{
+		$this->menu_collection	= array();
+
+		foreach ($plugins as $plugin => $plugin_instance)
+		{
+			$this->register($plugin_instance);
+		}
+	}
+
+	/**
+	 * Returns navigation array
+	 *
+	 * @return array
+	 */
+	public function get()
+	{
+		return $this->menu_collection;
+	}
+
+	/**
+	 * Registers a navigation provider's navigation items
+	 *
+	 * @param navigation_interface	$navigation
+	 */
+	public function register(navigation_interface $navigation)
+	{
+		$nav_arry = $navigation->get();
+		$this->menu_collection = $this->merge($nav_arry, $this->menu_collection);
+	}
+
+	/**
+	 * Set a property in the navigation array
+	 *
+	 * @param array	$nav_element	Array to the navigation elem
+	 * @param array	$property_array	Array with the properties to set
+	 */
+	public function set_nav_property($nav_element, $property_array)
+	{
+		$array_pointer = array();
+		$array_root_pointer = &$array_pointer;
+		foreach ($nav_element as $array_path)
+		{
+			$array_pointer[$array_path] = array();
+			$array_pointer = &$array_pointer[$array_path];
+		}
+
+		$array_pointer = $property_array;
+
+		$this->menu_collection = $this->merge($array_root_pointer, $this->menu_collection);
+	}
+
+	/**
+	 * Recursive array merge
+	 *
+	 * This function is necessary to be able to replace the options of
+	 * already set navigation items.
+	 *
+	 * @param array	$array_to_merge
+	 * @param array	$array_to_merge_into
+	 *
+	 * @return array	Merged array
+	 */
+	private function merge($array_to_merge, $array_to_merge_into)
+	{
+		$merged_array = $array_to_merge_into;
+
+		foreach ($array_to_merge as $key => $value)
+		{
+			if (isset($array_to_merge_into[$key]))
+			{
+				if (is_array($array_to_merge_into[$key]) && is_array($value))
+				{
+					$merged_array[$key] = $this->merge($value, $array_to_merge_into[$key]);
+				}
+				else
+				{
+					$merged_array[$key] = $value;
+				}
+			}
+			else
+			{
+				$merged_array[$key] = $value;
+			}
+		}
+
+		return $merged_array;
+	}
+}
diff --git a/phpBB/phpbb/install/helper/navigation/update_navigation.php b/phpBB/phpbb/install/helper/navigation/update_navigation.php
new file mode 100644
index 0000000000..3d239c3451
--- /dev/null
+++ b/phpBB/phpbb/install/helper/navigation/update_navigation.php
@@ -0,0 +1,80 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\helper\navigation;
+
+use phpbb\install\helper\install_helper;
+
+class update_navigation implements navigation_interface
+{
+	/**
+	 * @var install_helper
+	 */
+	private $install_helper;
+
+	/**
+	 * Constructor
+	 *
+	 * @param install_helper	$install_helper
+	 */
+	public function __construct(install_helper $install_helper)
+	{
+		$this->install_helper = $install_helper;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get()
+	{
+		if (!$this->install_helper->is_phpbb_installed())
+		{
+			return array();
+		}
+
+		return array(
+			'update' => array(
+				'label'		=> 'UPDATE',
+				'route'		=> 'phpbb_installer_update',
+				'order'		=> 1,
+				array(
+					'introduction'	=> array(
+						'label'	=> 'INTRODUCTION_TITLE',
+						'stage'	=> true,
+						'order'	=> 0,
+					),
+					'requirements'	=> array(
+						'label'	=> 'STAGE_REQUIREMENTS',
+						'stage'	=> true,
+						'order'	=> 1,
+					),
+					'obtain_data'	=> array(
+						'label'	=> 'STAGE_OBTAIN_DATA',
+						'stage'	=> true,
+						'order'	=> 2,
+					),
+					'update_files'	=> array(
+						'label'	=> 'STAGE_UPDATE_FILES',
+						'stage'	=> true,
+						'order'	=> 3,
+					),
+					'update_database'	=> array(
+						'label'	=> 'STAGE_UPDATE_DATABASE',
+						'stage'	=> true,
+						'order'	=> 4,
+					),
+				),
+			),
+		);
+	}
+}
diff --git a/phpBB/phpbb/install/helper/update_helper.php b/phpBB/phpbb/install/helper/update_helper.php
new file mode 100644
index 0000000000..a00731d317
--- /dev/null
+++ b/phpBB/phpbb/install/helper/update_helper.php
@@ -0,0 +1,113 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\helper;
+
+/**
+ * General helper functionality for the updater
+ */
+class update_helper
+{
+	/**
+	 * @var string
+	 */
+	protected $path_to_new_files;
+
+	/**
+	 * @var string
+	 */
+	protected $path_to_old_files;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * Constructor
+	 *
+	 * @param string	$phpbb_root_path
+	 */
+	public function __construct($phpbb_root_path)
+	{
+		$this->phpbb_root_path		= $phpbb_root_path;
+		$this->path_to_new_files	= $phpbb_root_path . 'install/update/new/';
+		$this->path_to_old_files	= $phpbb_root_path . 'install/update/old/';
+	}
+
+	/**
+	 * Returns path to new update files
+	 *
+	 * @return string
+	 */
+	public function get_path_to_new_update_files()
+	{
+		return $this->path_to_new_files;
+	}
+
+	/**
+	 * Returns path to new update files
+	 *
+	 * @return string
+	 */
+	public function get_path_to_old_update_files()
+	{
+		return $this->path_to_old_files;
+	}
+
+	/**
+	 * Includes the updated file if available
+	 *
+	 * @param string	$filename	Path to the file relative to phpBB root path
+	 */
+	public function include_file($filename)
+	{
+		if (is_file($this->path_to_new_files . $filename))
+		{
+			include_once($this->path_to_new_files . $filename);
+		}
+		else if (is_file($this->phpbb_root_path . $filename))
+		{
+			include_once($this->phpbb_root_path . $filename);
+		}
+	}
+
+	/**
+	 * Customized version_compare()
+	 *
+	 * @param string		$version_number1
+	 * @param string		$version_number2
+	 * @param string|null	$operator
+	 * @return int|bool	The returned value is identical to the PHP build-in function version_compare()
+	 */
+	public function phpbb_version_compare($version_number1, $version_number2, $operator = null)
+	{
+		if ($operator === null)
+		{
+			$result = version_compare(
+				str_replace('rc', 'RC', strtolower($version_number1)),
+				str_replace('rc', 'RC', strtolower($version_number2))
+			);
+		}
+		else
+		{
+			$result = version_compare(
+				str_replace('rc', 'RC', strtolower($version_number1)),
+				str_replace('rc', 'RC', strtolower($version_number2)),
+				$operator
+			);
+		}
+
+		return $result;
+	}
+}
diff --git a/phpBB/phpbb/install/installer.php b/phpBB/phpbb/install/installer.php
new file mode 100644
index 0000000000..e04e233a76
--- /dev/null
+++ b/phpBB/phpbb/install/installer.php
@@ -0,0 +1,350 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install;
+
+use phpbb\cache\driver\driver_interface;
+use phpbb\di\ordered_service_collection;
+use phpbb\install\exception\cannot_build_container_exception;
+use phpbb\install\exception\installer_config_not_writable_exception;
+use phpbb\install\exception\jump_to_restart_point_exception;
+use phpbb\install\exception\resource_limit_reached_exception;
+use phpbb\install\exception\user_interaction_required_exception;
+use phpbb\install\helper\config;
+use phpbb\install\helper\container_factory;
+use phpbb\install\helper\iohandler\ajax_iohandler;
+use phpbb\install\helper\iohandler\cli_iohandler;
+use phpbb\install\helper\iohandler\iohandler_interface;
+use phpbb\path_helper;
+
+class installer
+{
+	/**
+	 * @var driver_interface
+	 */
+	protected $cache;
+
+	/**
+	 * @var container_factory
+	 */
+	protected $container_factory;
+
+	/**
+	 * @var config
+	 */
+	protected $install_config;
+
+	/**
+	 * @var ordered_service_collection
+	 */
+	protected $installer_modules;
+
+	/**
+	 * @var iohandler_interface
+	 */
+	protected $iohandler;
+
+	/**
+	 * @var string
+	 */
+	protected $web_root;
+
+	/**
+	 * Stores the number of steps that a given module has
+	 *
+	 * @var array
+	 */
+	protected $module_step_count;
+
+	/**
+	 * @var bool
+	 */
+	protected $purge_cache_before;
+
+	/**
+	 * Constructor
+	 *
+	 * @param driver_interface	$cache			Cache service
+	 * @param config			$config			Installer config handler
+	 * @param path_helper		$path_helper	Path helper
+	 * @param container_factory	$container		Container
+	 */
+	public function __construct(driver_interface $cache, config $config, path_helper $path_helper, container_factory $container)
+	{
+		$this->cache				= $cache;
+		$this->install_config		= $config;
+		$this->container_factory	= $container;
+		$this->installer_modules	= null;
+		$this->web_root				= $path_helper->get_web_root_path();
+		$this->purge_cache_before	= false;
+	}
+
+	/**
+	 * Sets modules to execute
+	 *
+	 * Note: The installer will run modules in the order they are set in
+	 * the array.
+	 *
+	 * @param ordered_service_collection	$modules	Service collection of module service names
+	 */
+	public function set_modules(ordered_service_collection $modules)
+	{
+		$this->installer_modules = $modules;
+	}
+
+	/**
+	 * Sets input-output handler objects
+	 *
+	 * @param iohandler_interface	$iohandler
+	 */
+	public function set_iohandler(iohandler_interface $iohandler)
+	{
+		$this->iohandler = $iohandler;
+	}
+
+	/**
+	 * Sets whether to purge cache before the installation process
+	 *
+	 * @param bool	$purge_cache_before
+	 */
+	public function set_purge_cache_before($purge_cache_before)
+	{
+		$this->purge_cache_before = $purge_cache_before;
+	}
+
+	/**
+	 * Run phpBB installer
+	 */
+	public function run()
+	{
+		if ($this->iohandler instanceof ajax_iohandler)
+		{
+			$this->iohandler->acquire_lock();
+		}
+
+		// Load install progress
+		$this->install_config->load_config();
+
+		if (!$this->install_config->get('cache_purged_before', false) && $this->purge_cache_before)
+		{
+			/** @var \phpbb\cache\driver\driver_interface $cache */
+			$cache = $this->container_factory->get('cache.driver');
+			$cache->purge();
+			$this->install_config->set('cache_purged_before', true);
+		}
+
+		// Recover install progress
+		$module_index = $this->recover_progress();
+
+		// Variable used to check if the install process have been finished
+		$install_finished	= false;
+		$fail_cleanup		= false;
+		$send_refresh		= false;
+
+		// We are installing something, so the introduction stage can go now...
+		$this->install_config->set_finished_navigation_stage(array('install', 0, 'introduction'));
+		$this->iohandler->set_finished_stage_menu(array('install', 0, 'introduction'));
+
+		if ($this->install_config->get_task_progress_count() === 0)
+		{
+			// Count all tasks in the current installer modules
+			$step_count = 0;
+
+			/** @var \phpbb\install\module_interface $module */
+			foreach ($this->installer_modules as $name => $module)
+			{
+				$module_step_count = $module->get_step_count();
+				$step_count += $module_step_count;
+				$this->module_step_count[$name] = $module_step_count;
+			}
+
+			// Set task count
+			$this->install_config->set_task_progress_count($step_count);
+		}
+
+		// Set up progress information
+		$this->iohandler->set_task_count(
+			$this->install_config->get_task_progress_count()
+		);
+
+		try
+		{
+			$iterator = $this->installer_modules->getIterator();
+
+			if ($module_index < $iterator->count())
+			{
+				$iterator->seek($module_index);
+			}
+			else
+			{
+				$iterator->seek($module_index - 1);
+				$iterator->next();
+			}
+
+			while ($iterator->valid())
+			{
+				$module	= $iterator->current();
+				$name	= $iterator->key();
+
+				// Check if module should be executed
+				if (!$module->is_essential() && !$module->check_requirements())
+				{
+					$this->install_config->set_finished_navigation_stage($module->get_navigation_stage_path());
+					$this->iohandler->set_finished_stage_menu($module->get_navigation_stage_path());
+
+					$this->iohandler->add_log_message(array(
+						'SKIP_MODULE',
+						$name,
+					));
+					$this->install_config->increment_current_task_progress($this->module_step_count[$name]);
+				}
+				else
+				{
+					// Set the correct stage in the navigation bar
+					$this->install_config->set_active_navigation_stage($module->get_navigation_stage_path());
+					$this->iohandler->set_active_stage_menu($module->get_navigation_stage_path());
+
+					$this->iohandler->send_response();
+
+					$module->run();
+
+					$this->install_config->set_finished_navigation_stage($module->get_navigation_stage_path());
+					$this->iohandler->set_finished_stage_menu($module->get_navigation_stage_path());
+				}
+
+				$module_index++;
+				$iterator->next();
+
+				// Save progress
+				$this->install_config->set_active_module($name, $module_index);
+
+				if ($iterator->valid() && ($this->install_config->get_time_remaining() <= 0 || $this->install_config->get_memory_remaining() <= 0))
+				{
+					throw new resource_limit_reached_exception();
+				}
+			}
+
+			// Installation finished
+			$install_finished = true;
+
+			if ($this->iohandler instanceof cli_iohandler)
+			{
+				$this->iohandler->add_success_message('INSTALLER_FINISHED');
+			}
+			else
+			{
+				// Start session if not installing and get user object
+				// to allow redirecting to ACP
+				$user = $this->container_factory->get('user');
+				if (!isset($module) || !($module instanceof \phpbb\install\module\install_finish\module))
+				{
+					$auth = $this->container_factory->get('auth');
+
+					$user->session_begin();
+					$auth->acl($user->data);
+					$user->setup();
+				}
+
+				$phpbb_root_path = $this->container_factory->get_parameter('core.root_path');
+
+				$acp_url = append_sid($phpbb_root_path . 'adm/index.php', 'i=acp_help_phpbb&mode=help_phpbb', true, $user->session_id);
+				$this->iohandler->add_success_message('INSTALLER_FINISHED', array(
+					'ACP_LINK',
+					$acp_url,
+				));
+			}
+		}
+		catch (user_interaction_required_exception $e)
+		{
+			$this->iohandler->send_response(true);
+		}
+		catch (resource_limit_reached_exception $e)
+		{
+			$send_refresh = true;
+		}
+		catch (jump_to_restart_point_exception $e)
+		{
+			$this->install_config->jump_to_restart_point($e->get_restart_point_name());
+			$send_refresh = true;
+		}
+		catch (\Exception $e)
+		{
+			$this->iohandler->add_error_message($e->getMessage());
+			$this->iohandler->send_response(true);
+			$fail_cleanup = true;
+		}
+
+		if ($this->iohandler instanceof ajax_iohandler)
+		{
+			$this->iohandler->release_lock();
+		}
+
+		if ($install_finished)
+		{
+			// Send install finished message
+			$this->iohandler->set_progress('INSTALLER_FINISHED', $this->install_config->get_task_progress_count());
+			$this->iohandler->send_response(true);
+		}
+		else if ($send_refresh)
+		{
+			$this->iohandler->request_refresh();
+			$this->iohandler->send_response(true);
+		}
+
+		// Save install progress
+		try
+		{
+			if ($install_finished || $fail_cleanup)
+			{
+				$this->install_config->clean_up_config_file();
+				$this->cache->purge();
+
+				try
+				{
+					/** @var \phpbb\cache\driver\driver_interface $cache */
+					$cache = $this->container_factory->get('cache.driver');
+					$cache->purge();
+				}
+				catch (cannot_build_container_exception $e)
+				{
+					// Do not do anything, this just means there is no config.php yet
+				}
+			}
+			else
+			{
+				$this->install_config->save_config();
+			}
+		}
+		catch (installer_config_not_writable_exception $e)
+		{
+			// It is allowed to fail this test during requirements testing
+			$progress_data = $this->install_config->get_progress_data();
+
+			if ($progress_data['last_task_module_name'] !== 'installer.module.requirements_install')
+			{
+				$this->iohandler->add_error_message('INSTALLER_CONFIG_NOT_WRITABLE');
+			}
+		}
+	}
+
+	/**
+	 * Recover install progress
+	 *
+	 * @return string	Index of the next installer module to execute
+	 */
+	protected function recover_progress()
+	{
+		$progress_array = $this->install_config->get_progress_data();
+		return $progress_array['last_task_module_index'];
+	}
+}
diff --git a/phpBB/phpbb/install/installer_configuration.php b/phpBB/phpbb/install/installer_configuration.php
new file mode 100644
index 0000000000..805140338c
--- /dev/null
+++ b/phpBB/phpbb/install/installer_configuration.php
@@ -0,0 +1,147 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\install;
+
+use Symfony\Component\Config\Definition\Builder\TreeBuilder;
+use Symfony\Component\Config\Definition\ConfigurationInterface;
+
+class installer_configuration implements ConfigurationInterface
+{
+
+	/**
+	 * Generates the configuration tree builder.
+	 *
+	 * @return \Symfony\Component\Config\Definition\Builder\TreeBuilder The tree builder
+	 */
+	public function getConfigTreeBuilder()
+	{
+		$treeBuilder = new TreeBuilder();
+		$rootNode = $treeBuilder->root('installer');
+		$rootNode
+			->children()
+				->arrayNode('admin')
+					->children()
+						->scalarNode('name')->defaultValue('admin')->cannotBeEmpty()->end()
+						->scalarNode('password')->defaultValue('adminadmin')->cannotBeEmpty()->end()
+						->scalarNode('email')->defaultValue('admin@example.org')->cannotBeEmpty()->end()
+					->end()
+				->end()
+				->arrayNode('board')
+					->children()
+						->scalarNode('lang')
+							->defaultValue('en')
+							->cannotBeEmpty()
+							->end()
+						->scalarNode('name')
+							->defaultValue('My Board')
+							->cannotBeEmpty()
+							->end()
+						->scalarNode('description')
+						->defaultValue('My amazing new phpBB board')
+						->cannotBeEmpty()
+						->end()
+					->end()
+				->end()
+				->arrayNode('database')
+					->children()
+						->scalarNode('dbms')
+							->defaultValue('sqlite3')
+							->cannotBeEmpty()
+							->isRequired()
+							->end()
+						->scalarNode('dbhost')
+							->defaultValue(null)
+							->end()
+						->scalarNode('dbport')
+							->defaultValue(null)
+							->end()
+						->scalarNode('dbuser')
+							->defaultValue(null)
+							->end()
+						->scalarNode('dbpasswd')
+							->defaultValue(null)
+							->end()
+						->scalarNode('dbname')
+							->defaultValue(null)
+							->end()
+						->scalarNode('table_prefix')
+							->defaultValue('phpbb_')
+							->cannotBeEmpty()
+							->isRequired()
+							->end()
+					->end()
+				->end()
+				->arrayNode('email')
+					->canBeEnabled()
+					->addDefaultsIfNotSet()
+					->children()
+						->booleanNode('smtp_delivery')
+							->defaultValue(false)
+							->treatNullLike(false)
+							->end()
+						->scalarNode('smtp_host')
+							->defaultValue(null)
+							->end()
+						->scalarNode('smtp_port')
+							->defaultValue(null)
+							->end()
+						->scalarNode('smtp_auth')
+							->defaultValue(null)
+							->end()
+						->scalarNode('smtp_user')
+							->defaultValue(null)
+							->end()
+						->scalarNode('smtp_pass')
+							->defaultValue(null)
+							->end()
+					->end()
+				->end()
+				->arrayNode('server')
+					->children()
+						->booleanNode('cookie_secure')
+							->defaultValue(false)
+							->treatNullLike(false)
+							->end()
+						->scalarNode('server_protocol')
+							->defaultValue('http://')
+							->cannotBeEmpty()
+							->end()
+						->booleanNode('force_server_vars')
+							->defaultValue(false)
+							->treatNullLike(false)
+							->end()
+						->scalarNode('server_name')
+							->defaultValue('localhost')
+							->cannotBeEmpty()
+							->end()
+						->integerNode('server_port')
+							->defaultValue(80)
+							->min(1)
+							->cannotBeEmpty()
+							->end()
+						->scalarNode('script_path')
+							->defaultValue('/')
+							->cannotBeEmpty()
+							 ->end()
+					->end()
+				->end()
+				->arrayNode('extensions')
+					->prototype('scalar')->end()
+					->defaultValue([])
+				->end()
+			->end()
+		;
+		return $treeBuilder;
+	}
+}
diff --git a/phpBB/phpbb/install/module/install_data/module.php b/phpBB/phpbb/install/module/install_data/module.php
new file mode 100644
index 0000000000..77f1f73f1f
--- /dev/null
+++ b/phpBB/phpbb/install/module/install_data/module.php
@@ -0,0 +1,28 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\install_data;
+
+/**
+ * Installer module for recovering and installing default data installation
+ */
+class module extends \phpbb\install\module_base
+{
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_navigation_stage_path()
+	{
+		return array('install', 0, 'install');
+	}
+}
diff --git a/phpBB/phpbb/install/module/install_data/task/add_bots.php b/phpBB/phpbb/install/module/install_data/task/add_bots.php
new file mode 100644
index 0000000000..07f8e025cf
--- /dev/null
+++ b/phpBB/phpbb/install/module/install_data/task/add_bots.php
@@ -0,0 +1,263 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\install_data\task;
+
+use phpbb\install\exception\resource_limit_reached_exception;
+
+class add_bots extends \phpbb\install\task_base
+{
+	/**
+	 * A list of the web-crawlers/bots we recognise by default
+	 *
+	 * Candidates but not included:
+	 * 'Accoona [Bot]'				'Accoona-AI-Agent/'
+	 * 'ASPseek [Crawler]'			'ASPseek/'
+	 * 'Boitho [Crawler]'			'boitho.com-dc/'
+	 * 'Bunnybot [Bot]'				'powered by www.buncat.de'
+	 * 'Cosmix [Bot]'				'cfetch/'
+	 * 'Crawler Search [Crawler]'	'.Crawler-Search.de'
+	 * 'Findexa [Crawler]'			'Findexa Crawler ('
+	 * 'GBSpider [Spider]'			'GBSpider v'
+	 * 'genie [Bot]'				'genieBot ('
+	 * 'Hogsearch [Bot]'			'oegp v. 1.3.0'
+	 * 'Insuranco [Bot]'			'InsurancoBot'
+	 * 'IRLbot [Bot]'				'http://irl.cs.tamu.edu/crawler'
+	 * 'ISC Systems [Bot]'			'ISC Systems iRc Search'
+	 * 'Jyxobot [Bot]'				'Jyxobot/'
+	 * 'Kraehe [Metasuche]'			'-DIE-KRAEHE- META-SEARCH-ENGINE/'
+	 * 'LinkWalker'					'LinkWalker'
+	 * 'MMSBot [Bot]'				'http://www.mmsweb.at/bot.html'
+	 * 'Naver [Bot]'				'nhnbot@naver.com)'
+	 * 'NetResearchServer'			'NetResearchServer/'
+	 * 'Nimble [Crawler]'			'NimbleCrawler'
+	 * 'Ocelli [Bot]'				'Ocelli/'
+	 * 'Onsearch [Bot]'				'onCHECK-Robot'
+	 * 'Orange [Spider]'			'OrangeSpider'
+	 * 'Sproose [Bot]'				'http://www.sproose.com/bot'
+	 * 'Susie [Sync]'				'!Susie (http://www.sync2it.com/susie)'
+	 * 'Tbot [Bot]'					'Tbot/'
+	 * 'Thumbshots [Capture]'		'thumbshots-de-Bot'
+	 * 'Vagabondo [Crawler]'		'http://webagent.wise-guys.nl/'
+	 * 'Walhello [Bot]'				'appie 1.1 (www.walhello.com)'
+	 * 'WissenOnline [Bot]'			'WissenOnline-Bot'
+	 * 'WWWeasel [Bot]'				'WWWeasel Robot v'
+	 * 'Xaldon [Spider]'			'Xaldon WebSpider'
+	 *
+	 * @var array
+	 */
+	protected $bot_list = array(
+		'AdsBot [Google]'			=> array('AdsBot-Google', ''),
+		'Alexa [Bot]'				=> array('ia_archiver', ''),
+		'Alta Vista [Bot]'			=> array('Scooter/', ''),
+		'Ask Jeeves [Bot]'			=> array('Ask Jeeves', ''),
+		'Baidu [Spider]'			=> array('Baiduspider', ''),
+		'Bing [Bot]'				=> array('bingbot/', ''),
+		'Exabot [Bot]'				=> array('Exabot', ''),
+		'FAST Enterprise [Crawler]'	=> array('FAST Enterprise Crawler', ''),
+		'FAST WebCrawler [Crawler]'	=> array('FAST-WebCrawler/', ''),
+		'Francis [Bot]'				=> array('http://www.neomo.de/', ''),
+		'Gigabot [Bot]'				=> array('Gigabot/', ''),
+		'Google Adsense [Bot]'		=> array('Mediapartners-Google', ''),
+		'Google Desktop'			=> array('Google Desktop', ''),
+		'Google Feedfetcher'		=> array('Feedfetcher-Google', ''),
+		'Google [Bot]'				=> array('Googlebot', ''),
+		'Heise IT-Markt [Crawler]'	=> array('heise-IT-Markt-Crawler', ''),
+		'Heritrix [Crawler]'		=> array('heritrix/1.', ''),
+		'IBM Research [Bot]'		=> array('ibm.com/cs/crawler', ''),
+		'ICCrawler - ICjobs'		=> array('ICCrawler - ICjobs', ''),
+		'ichiro [Crawler]'			=> array('ichiro/', ''),
+		'Majestic-12 [Bot]'			=> array('MJ12bot/', ''),
+		'Metager [Bot]'				=> array('MetagerBot/', ''),
+		'MSN NewsBlogs'				=> array('msnbot-NewsBlogs/', ''),
+		'MSN [Bot]'					=> array('msnbot/', ''),
+		'MSNbot Media'				=> array('msnbot-media/', ''),
+		'Nutch [Bot]'				=> array('http://lucene.apache.org/nutch/', ''),
+		'Online link [Validator]'	=> array('online link validator', ''),
+		'psbot [Picsearch]'			=> array('psbot/0', ''),
+		'Sensis [Crawler]'			=> array('Sensis Web Crawler', ''),
+		'SEO Crawler'				=> array('SEO search Crawler/', ''),
+		'Seoma [Crawler]'			=> array('Seoma [SEO Crawler]', ''),
+		'SEOSearch [Crawler]'		=> array('SEOsearch/', ''),
+		'Snappy [Bot]'				=> array('Snappy/1.1 ( http://www.urltrends.com/ )', ''),
+		'Steeler [Crawler]'			=> array('http://www.tkl.iis.u-tokyo.ac.jp/~crawler/', ''),
+		'Telekom [Bot]'				=> array('crawleradmin.t-info@telekom.de', ''),
+		'TurnitinBot [Bot]'			=> array('TurnitinBot/', ''),
+		'Voyager [Bot]'				=> array('voyager/', ''),
+		'W3 [Sitesearch]'			=> array('W3 SiteSearch Crawler', ''),
+		'W3C [Linkcheck]'			=> array('W3C-checklink/', ''),
+		'W3C [Validator]'			=> array('W3C_Validator', ''),
+		'YaCy [Bot]'				=> array('yacybot', ''),
+		'Yahoo MMCrawler [Bot]'		=> array('Yahoo-MMCrawler/', ''),
+		'Yahoo Slurp [Bot]'			=> array('Yahoo! DE Slurp', ''),
+		'Yahoo [Bot]'				=> array('Yahoo! Slurp', ''),
+		'YahooSeeker [Bot]'			=> array('YahooSeeker/', ''),
+	);
+
+	/**
+	 * @var \phpbb\db\driver\driver_interface
+	 */
+	protected $db;
+
+	/**
+	 * @var \phpbb\install\helper\config
+	 */
+	protected $install_config;
+
+	/**
+	 * @var \phpbb\install\helper\iohandler\iohandler_interface
+	 */
+	protected $io_handler;
+
+	/**
+	 * @var \phpbb\language\language
+	 */
+	protected $language;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * @var string
+	 */
+	protected $php_ext;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\install\helper\config							$install_config		Installer's config
+	 * @param \phpbb\install\helper\iohandler\iohandler_interface	$iohandler			Input-output handler for the installer
+	 * @param \phpbb\install\helper\container_factory				$container			Installer's DI container
+	 * @param \phpbb\language\language								$language			Language provider
+	 * @param string												$phpbb_root_path	Relative path to phpBB root
+	 * @param string												$php_ext			PHP extension
+	 */
+	public function __construct(\phpbb\install\helper\config $install_config,
+								\phpbb\install\helper\iohandler\iohandler_interface $iohandler,
+								\phpbb\install\helper\container_factory $container,
+								\phpbb\language\language $language,
+								$phpbb_root_path,
+								$php_ext)
+	{
+		parent::__construct(true);
+
+		$this->db				= $container->get('dbal.conn');
+		$this->install_config	= $install_config;
+		$this->io_handler		= $iohandler;
+		$this->language			= $language;
+		$this->phpbb_root_path	= $phpbb_root_path;
+		$this->php_ext			= $php_ext;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		$this->db->sql_return_on_error(true);
+
+		$sql = 'SELECT group_id
+			FROM ' . GROUPS_TABLE . "
+			WHERE group_name = 'BOTS'";
+		$result = $this->db->sql_query($sql);
+		$group_id = (int) $this->db->sql_fetchfield('group_id');
+		$this->db->sql_freeresult($result);
+
+		if (!$group_id)
+		{
+			// If we reach this point then something has gone very wrong
+			$this->io_handler->add_error_message('NO_GROUP');
+		}
+
+		$i = $this->install_config->get('add_bot_index', 0);
+		$bot_list = array_slice($this->bot_list, $i);
+
+		foreach ($bot_list as $bot_name => $bot_ary)
+		{
+			$user_row = array(
+				'user_type'				=> USER_IGNORE,
+				'group_id'				=> $group_id,
+				'username'				=> $bot_name,
+				'user_regdate'			=> time(),
+				'user_password'			=> '',
+				'user_colour'			=> '9E8DA7',
+				'user_email'			=> '',
+				'user_lang'				=> $this->install_config->get('default_lang'),
+				'user_style'			=> 1,
+				'user_timezone'			=> 'UTC',
+				'user_dateformat'		=> $this->language->lang('default_dateformat'),
+				'user_allow_massemail'	=> 0,
+				'user_allow_pm'			=> 0,
+			);
+
+			if (!function_exists('user_add'))
+			{
+				include($this->phpbb_root_path . 'includes/functions_user.' . $this->php_ext);
+			}
+
+			$user_id = user_add($user_row);
+
+			if (!$user_id)
+			{
+				// If we can't insert this user then continue to the next one to avoid inconsistent data
+				$this->io_handler->add_error_message('CONV_ERROR_INSERT_BOT');
+
+				$i++;
+				continue;
+			}
+
+			$sql = 'INSERT INTO ' . BOTS_TABLE . ' ' . $this->db->sql_build_array('INSERT', array(
+				'bot_active'	=> 1,
+				'bot_name'		=> (string) $bot_name,
+				'user_id'		=> (int) $user_id,
+				'bot_agent'		=> (string) $bot_ary[0],
+				'bot_ip'		=> (string) $bot_ary[1],
+			));
+
+			$this->db->sql_query($sql);
+
+			$i++;
+
+			// Stop execution if resource limit is reached
+			if ($this->install_config->get_time_remaining() <= 0 || $this->install_config->get_memory_remaining() <= 0)
+			{
+				break;
+			}
+		}
+
+		$this->install_config->set('add_bot_index', $i);
+
+		if ($i < count($this->bot_list))
+		{
+			throw new resource_limit_reached_exception();
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 1;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return 'TASK_ADD_BOTS';
+	}
+}
diff --git a/phpBB/phpbb/install/module/install_data/task/add_languages.php b/phpBB/phpbb/install/module/install_data/task/add_languages.php
new file mode 100644
index 0000000000..7ffdf4f276
--- /dev/null
+++ b/phpBB/phpbb/install/module/install_data/task/add_languages.php
@@ -0,0 +1,121 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\install_data\task;
+
+class add_languages extends \phpbb\install\task_base
+{
+	/**
+	 * @var \phpbb\db\driver\driver_interface
+	 */
+	protected $db;
+
+	/**
+	 * @var \phpbb\install\helper\iohandler\iohandler_interface
+	 */
+	protected $iohandler;
+
+	/**
+	 * @var \phpbb\language\language_file_helper
+	 */
+	protected $language_helper;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\install\helper\iohandler\iohandler_interface	$iohandler			Installer's input-output handler
+	 * @param \phpbb\install\helper\container_factory				$container			Installer's DI container
+	 * @param \phpbb\language\language_file_helper					$language_helper	Language file helper service
+	 */
+	public function __construct(\phpbb\install\helper\iohandler\iohandler_interface $iohandler,
+								\phpbb\install\helper\container_factory $container,
+								\phpbb\language\language_file_helper $language_helper)
+	{
+		$this->db				= $container->get('dbal.conn');
+		$this->iohandler		= $iohandler;
+		$this->language_helper	= $language_helper;
+
+		parent::__construct(true);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		$this->db->sql_return_on_error(true);
+
+		$languages = $this->language_helper->get_available_languages();
+		$installed_languages = array();
+
+		foreach ($languages as $lang_info)
+		{
+			$lang_pack = array(
+				'lang_iso'			=> $lang_info['iso'],
+				'lang_dir'			=> $lang_info['iso'],
+				'lang_english_name'	=> htmlspecialchars($lang_info['name']),
+				'lang_local_name'	=> htmlspecialchars($lang_info['local_name'], ENT_COMPAT, 'UTF-8'),
+				'lang_author'		=> htmlspecialchars($lang_info['author'], ENT_COMPAT, 'UTF-8'),
+			);
+
+			$this->db->sql_query('INSERT INTO ' . LANG_TABLE . ' ' . $this->db->sql_build_array('INSERT', $lang_pack));
+
+			$installed_languages[] = (int) $this->db->sql_nextid();
+			if ($this->db->get_sql_error_triggered())
+			{
+				$error = $this->db->sql_error($this->db->get_sql_error_sql());
+				$this->iohandler->add_error_message($error['message']);
+			}
+		}
+
+		$sql = 'SELECT * FROM ' . PROFILE_FIELDS_TABLE;
+		$result = $this->db->sql_query($sql);
+
+		$insert_buffer = new \phpbb\db\sql_insert_buffer($this->db, PROFILE_LANG_TABLE);
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			foreach ($installed_languages as $lang_id)
+			{
+				$insert_buffer->insert(array(
+					'field_id'				=> $row['field_id'],
+					'lang_id'				=> $lang_id,
+
+					// Remove phpbb_ from field name
+					'lang_name'				=> strtoupper(substr($row['field_name'], 6)),
+					'lang_explain'			=> '',
+					'lang_default_value'	=> '',
+				));
+			}
+		}
+
+		$this->db->sql_freeresult($result);
+
+		$insert_buffer->flush();
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 1;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return 'TASK_ADD_LANGUAGES';
+	}
+}
diff --git a/phpBB/phpbb/install/module/install_data/task/add_modules.php b/phpBB/phpbb/install/module/install_data/task/add_modules.php
new file mode 100644
index 0000000000..b64f4c31db
--- /dev/null
+++ b/phpBB/phpbb/install/module/install_data/task/add_modules.php
@@ -0,0 +1,568 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\install_data\task;
+
+use phpbb\install\exception\resource_limit_reached_exception;
+use phpbb\install\helper\config;
+use phpbb\install\helper\container_factory;
+use phpbb\install\helper\iohandler\iohandler_interface;
+
+class add_modules extends \phpbb\install\task_base
+{
+	/**
+	 * @var config
+	 */
+	protected $config;
+
+	/**
+	 * @var \phpbb\db\driver\driver_interface
+	 */
+	protected $db;
+
+	/**
+	 * @var \phpbb\extension\manager
+	 */
+	protected $extension_manager;
+
+	/**
+	 * @var \phpbb\install\helper\iohandler\iohandler_interface
+	 */
+	protected $iohandler;
+
+	/**
+	 * @var \phpbb\module\module_manager
+	 */
+	protected $module_manager;
+
+	/**
+	 * Define the module structure so that we can populate the database without
+	 * needing to hard-code module_id values
+	 *
+	 * @var array
+	 */
+	protected $module_categories = array(
+		'acp' => array(
+			'ACP_CAT_GENERAL' => array(
+				'ACP_QUICK_ACCESS',
+				'ACP_BOARD_CONFIGURATION',
+				'ACP_CLIENT_COMMUNICATION',
+				'ACP_SERVER_CONFIGURATION',
+			),
+			'ACP_CAT_FORUMS' => array(
+				'ACP_MANAGE_FORUMS',
+				'ACP_FORUM_BASED_PERMISSIONS',
+			),
+			'ACP_CAT_POSTING' => array(
+				'ACP_MESSAGES',
+				'ACP_ATTACHMENTS',
+			),
+			'ACP_CAT_USERGROUP' => array(
+				'ACP_CAT_USERS',
+				'ACP_GROUPS',
+				'ACP_USER_SECURITY',
+			),
+			'ACP_CAT_PERMISSIONS' => array(
+				'ACP_GLOBAL_PERMISSIONS',
+				'ACP_FORUM_BASED_PERMISSIONS',
+				'ACP_PERMISSION_ROLES',
+				'ACP_PERMISSION_MASKS',
+			),
+			'ACP_CAT_CUSTOMISE' => array(
+				'ACP_STYLE_MANAGEMENT',
+				'ACP_EXTENSION_MANAGEMENT',
+				'ACP_LANGUAGE',
+			),
+			'ACP_CAT_MAINTENANCE' => array(
+				'ACP_FORUM_LOGS',
+				'ACP_CAT_DATABASE',
+			),
+			'ACP_CAT_SYSTEM' => array(
+				'ACP_AUTOMATION',
+				'ACP_GENERAL_TASKS',
+				'ACP_MODULE_MANAGEMENT',
+			),
+			'ACP_CAT_DOT_MODS' => null,
+		),
+		'mcp' => array(
+			'MCP_MAIN'		=> null,
+			'MCP_QUEUE'		=> null,
+			'MCP_REPORTS'	=> null,
+			'MCP_NOTES'		=> null,
+			'MCP_WARN'		=> null,
+			'MCP_LOGS'		=> null,
+			'MCP_BAN'		=> null,
+		),
+		'ucp' => array(
+			'UCP_MAIN'			=> null,
+			'UCP_PROFILE'		=> null,
+			'UCP_PREFS'			=> null,
+			'UCP_PM'			=> null,
+			'UCP_USERGROUPS'	=> null,
+			'UCP_ZEBRA'			=> null,
+		),
+	);
+
+	/**
+	 * @var array
+	 */
+	protected $module_categories_basenames = array(
+		'UCP_PM' => 'ucp_pm',
+	);
+
+	/**
+	 * @var array
+	 */
+	protected $module_extras = array(
+		'acp'	=> array(
+			'ACP_QUICK_ACCESS' => array(
+				'ACP_MANAGE_USERS',
+				'ACP_GROUPS_MANAGE',
+				'ACP_MANAGE_FORUMS',
+				'ACP_MOD_LOGS',
+				'ACP_BOTS',
+				'ACP_PHP_INFO',
+			),
+			'ACP_FORUM_BASED_PERMISSIONS' => array(
+				'ACP_FORUM_PERMISSIONS',
+				'ACP_FORUM_PERMISSIONS_COPY',
+				'ACP_FORUM_MODERATORS',
+				'ACP_USERS_FORUM_PERMISSIONS',
+				'ACP_GROUPS_FORUM_PERMISSIONS',
+			),
+		),
+	);
+
+	/**
+	 * Constructor
+	 *
+	 * @parma config				$config		Installer's config
+	 * @param iohandler_interface	$iohandler	Installer's input-output handler
+	 * @param container_factory		$container	Installer's DI container
+	 */
+	public function __construct(config $config, iohandler_interface $iohandler, container_factory $container)
+	{
+		$this->config				= $config;
+		$this->db					= $container->get('dbal.conn');
+		$this->extension_manager	= $container->get('ext.manager');
+		$this->iohandler			= $iohandler;
+		$this->module_manager		= $container->get('module.manager');
+
+		parent::__construct(true);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		$this->db->sql_return_on_error(true);
+
+		$module_classes = array('acp', 'mcp', 'ucp');
+		$total = count($module_classes);
+		$i = $this->config->get('module_class_index', 0);
+		$module_classes = array_slice($module_classes, $i);
+
+		foreach ($module_classes as $module_class)
+		{
+			$categories = $this->config->get('module_categories_array', array());
+
+			$k = $this->config->get('module_categories_index', 0);
+			$module_categories = array_slice($this->module_categories[$module_class], $k);
+			$timed_out = false;
+
+			foreach ($module_categories as $cat_name => $subs)
+			{
+				// Check if this sub-category has a basename. If it has, use it.
+				$basename = (isset($this->module_categories_basenames[$cat_name])) ? $this->module_categories_basenames[$cat_name] : '';
+
+				$module_data = array(
+					'module_basename'	=> $basename,
+					'module_enabled'	=> 1,
+					'module_display'	=> 1,
+					'parent_id'			=> 0,
+					'module_class'		=> $module_class,
+					'module_langname'	=> $cat_name,
+					'module_mode'		=> '',
+					'module_auth'		=> '',
+				);
+
+				$this->module_manager->update_module_data($module_data);
+
+				// Check for last sql error happened
+				if ($this->db->get_sql_error_triggered())
+				{
+					$error = $this->db->sql_error($this->db->get_sql_error_sql());
+					$this->iohandler->add_error_message('INST_ERR_DB', $error['message']);
+				}
+
+				$categories[$cat_name]['id'] = (int) $module_data['module_id'];
+				$categories[$cat_name]['parent_id'] = 0;
+
+				if (is_array($subs))
+				{
+					foreach ($subs as $level2_name)
+					{
+						// Check if this sub-category has a basename. If it has, use it.
+						$basename = (isset($this->module_categories_basenames[$level2_name])) ? $this->module_categories_basenames[$level2_name] : '';
+
+						$module_data = array(
+							'module_basename'	=> $basename,
+							'module_enabled'	=> 1,
+							'module_display'	=> 1,
+							'parent_id'			=> (int) $categories[$cat_name]['id'],
+							'module_class'		=> $module_class,
+							'module_langname'	=> $level2_name,
+							'module_mode'		=> '',
+							'module_auth'		=> '',
+						);
+
+						$this->module_manager->update_module_data($module_data);
+
+						// Check for last sql error happened
+						if ($this->db->get_sql_error_triggered())
+						{
+							$error = $this->db->sql_error($this->db->get_sql_error_sql());
+							$this->iohandler->add_error_message('INST_ERR_DB', $error['message']);
+						}
+
+						$categories[$level2_name]['id'] = (int) $module_data['module_id'];
+						$categories[$level2_name]['parent_id'] = (int) $categories[$cat_name]['id'];
+					}
+				}
+
+				$k++;
+
+				// Stop execution if resource limit is reached
+				if ($this->config->get_time_remaining() <= 0 || $this->config->get_memory_remaining() <= 0)
+				{
+					$timed_out = true;
+					break;
+				}
+			}
+
+			$this->config->set('module_categories_array', $categories);
+			$this->config->set('module_categories_index', $k);
+
+			if ($timed_out)
+			{
+				throw new resource_limit_reached_exception();
+			}
+
+			// Get the modules we want to add... returned sorted by name
+			$module_info = $this->module_manager->get_module_infos($module_class);
+
+			$k = $this->config->get('module_info_index', 0);
+			$module_info = array_slice($module_info, $k);
+
+			foreach ($module_info as $module_basename => $fileinfo)
+			{
+				foreach ($fileinfo['modes'] as $module_mode => $row)
+				{
+					foreach ($row['cat'] as $cat_name)
+					{
+						if (!isset($categories[$cat_name]))
+						{
+							continue;
+						}
+
+						$module_data = array(
+							'module_basename'	=> $module_basename,
+							'module_enabled'	=> 1,
+							'module_display'	=> (isset($row['display'])) ? (int) $row['display'] : 1,
+							'parent_id'			=> (int) $categories[$cat_name]['id'],
+							'module_class'		=> $module_class,
+							'module_langname'	=> $row['title'],
+							'module_mode'		=> $module_mode,
+							'module_auth'		=> $row['auth'],
+						);
+
+						$this->module_manager->update_module_data($module_data);
+
+						// Check for last sql error happened
+						if ($this->db->get_sql_error_triggered())
+						{
+							$error = $this->db->sql_error($this->db->get_sql_error_sql());
+							$this->iohandler->add_error_message('INST_ERR_DB', $error['message']);
+						}
+					}
+				}
+
+				$k++;
+
+				// Stop execution if resource limit is reached
+				if ($this->config->get_time_remaining() <= 0 || $this->config->get_memory_remaining() <= 0)
+				{
+					$timed_out = true;
+					break;
+				}
+			}
+
+			$this->config->set('module_info_index', $k);
+
+			// Stop execution if resource limit is reached
+			if ($timed_out)
+			{
+				throw new resource_limit_reached_exception();
+			}
+
+			// Move some of the modules around since the code above will put them in the wrong place
+			if (!$this->config->get('modules_ordered', false))
+			{
+				$this->order_modules($module_class);
+				$this->config->set('modules_ordered', true);
+
+				// Stop execution if resource limit is reached
+				if ($this->config->get_time_remaining() <= 0 || $this->config->get_memory_remaining() <= 0)
+				{
+					throw new resource_limit_reached_exception();
+				}
+			}
+
+			// And now for the special ones
+			// (these are modules which appear in multiple categories and thus get added manually
+			// to some for more control)
+			if (isset($this->module_extras[$module_class]))
+			{
+				$this->add_module_extras($module_class);
+			}
+
+			$this->module_manager->remove_cache_file($module_class);
+
+			$i++;
+
+			$this->config->set('module_class_index', $i);
+			$this->config->set('module_categories_index', 0);
+			$this->config->set('module_info_index', 0);
+			$this->config->set('added_extra_modules', false);
+			$this->config->set('modules_ordered', false);
+			$this->config->set('module_categories_array', array());
+
+			// Stop execution if resource limit is reached
+			if ($this->config->get_time_remaining() <= 0 || $this->config->get_memory_remaining() <= 0)
+			{
+				break;
+			}
+		}
+
+		if ($i < $total)
+		{
+			throw new resource_limit_reached_exception();
+		}
+	}
+
+	/**
+	 * Move modules to their correct place
+	 *
+	 * @param string	$module_class
+	 */
+	protected function order_modules($module_class)
+	{
+		if ($module_class == 'acp')
+		{
+			// Move main module 4 up...
+			$sql = 'SELECT *
+				FROM ' . MODULES_TABLE . "
+				WHERE module_basename = 'acp_main'
+					AND module_class = 'acp'
+					AND module_mode = 'main'";
+			$result = $this->db->sql_query($sql);
+			$row = $this->db->sql_fetchrow($result);
+			$this->db->sql_freeresult($result);
+
+			$this->module_manager->move_module_by($row, 'acp', 'move_up', 4);
+
+			// Move permissions intro screen module 4 up...
+			$sql = 'SELECT *
+				FROM ' . MODULES_TABLE . "
+				WHERE module_basename = 'acp_permissions'
+					AND module_class = 'acp'
+					AND module_mode = 'intro'";
+			$result = $this->db->sql_query($sql);
+			$row = $this->db->sql_fetchrow($result);
+			$this->db->sql_freeresult($result);
+
+			$this->module_manager->move_module_by($row, 'acp', 'move_up', 4);
+
+			// Move manage users screen module 5 up...
+			$sql = 'SELECT *
+				FROM ' . MODULES_TABLE . "
+				WHERE module_basename = 'acp_users'
+					AND module_class = 'acp'
+					AND module_mode = 'overview'";
+			$result = $this->db->sql_query($sql);
+			$row = $this->db->sql_fetchrow($result);
+			$this->db->sql_freeresult($result);
+
+			$this->module_manager->move_module_by($row, 'acp', 'move_up', 5);
+
+			// Move extension management module 1 up...
+			$sql = 'SELECT *
+				FROM ' . MODULES_TABLE . "
+				WHERE module_langname = 'ACP_EXTENSION_MANAGEMENT'
+					AND module_class = 'acp'
+					AND module_mode = ''
+					AND module_basename = ''";
+			$result = $this->db->sql_query($sql);
+			$row = $this->db->sql_fetchrow($result);
+			$this->db->sql_freeresult($result);
+
+			$this->module_manager->move_module_by($row, 'acp', 'move_up', 1);
+		}
+
+		if ($module_class == 'mcp')
+		{
+			// Move pm report details module 3 down...
+			$sql = 'SELECT *
+				FROM ' . MODULES_TABLE . "
+				WHERE module_basename = 'mcp_pm_reports'
+					AND module_class = 'mcp'
+					AND module_mode = 'pm_report_details'";
+			$result = $this->db->sql_query($sql);
+			$row = $this->db->sql_fetchrow($result);
+			$this->db->sql_freeresult($result);
+
+			$this->module_manager->move_module_by($row, 'mcp', 'move_down', 3);
+
+			// Move closed pm reports module 3 down...
+			$sql = 'SELECT *
+				FROM ' . MODULES_TABLE . "
+				WHERE module_basename = 'mcp_pm_reports'
+					AND module_class = 'mcp'
+					AND module_mode = 'pm_reports_closed'";
+			$result = $this->db->sql_query($sql);
+			$row = $this->db->sql_fetchrow($result);
+			$this->db->sql_freeresult($result);
+
+			$this->module_manager->move_module_by($row, 'mcp', 'move_down', 3);
+
+			// Move open pm reports module 3 down...
+			$sql = 'SELECT *
+				FROM ' . MODULES_TABLE . "
+				WHERE module_basename = 'mcp_pm_reports'
+					AND module_class = 'mcp'
+					AND module_mode = 'pm_reports'";
+			$result = $this->db->sql_query($sql);
+			$row = $this->db->sql_fetchrow($result);
+			$this->db->sql_freeresult($result);
+
+			$this->module_manager->move_module_by($row, 'mcp', 'move_down', 3);
+		}
+
+		if ($module_class == 'ucp')
+		{
+			// Move attachment module 4 down...
+			$sql = 'SELECT *
+				FROM ' . MODULES_TABLE . "
+				WHERE module_basename = 'ucp_attachments'
+					AND module_class = 'ucp'
+					AND module_mode = 'attachments'";
+			$result = $this->db->sql_query($sql);
+			$row = $this->db->sql_fetchrow($result);
+			$this->db->sql_freeresult($result);
+
+			$this->module_manager->move_module_by($row, 'ucp', 'move_down', 4);
+
+			// Move notification options module 4 down...
+			$sql = 'SELECT *
+				FROM ' . MODULES_TABLE . "
+				WHERE module_basename = 'ucp_notifications'
+					AND module_class = 'ucp'
+					AND module_mode = 'notification_options'";
+			$result = $this->db->sql_query($sql);
+			$row = $this->db->sql_fetchrow($result);
+			$this->db->sql_freeresult($result);
+
+			$this->module_manager->move_module_by($row, 'ucp', 'move_down', 4);
+
+			// Move OAuth module 5 down...
+			$sql = 'SELECT *
+				FROM ' . MODULES_TABLE . "
+				WHERE module_basename = 'ucp_auth_link'
+					AND module_class = 'ucp'
+					AND module_mode = 'auth_link'";
+			$result = $this->db->sql_query($sql);
+			$row = $this->db->sql_fetchrow($result);
+			$this->db->sql_freeresult($result);
+
+			$this->module_manager->move_module_by($row, 'ucp', 'move_down', 5);
+		}
+	}
+
+	/**
+	 * Add extra modules
+	 *
+	 * @param string	$module_class
+	 */
+	protected function add_module_extras($module_class)
+	{
+		foreach ($this->module_extras[$module_class] as $cat_name => $mods)
+		{
+			$sql = 'SELECT module_id, left_id, right_id
+				FROM ' . MODULES_TABLE . "
+				WHERE module_langname = '" . $this->db->sql_escape($cat_name) . "'
+					AND module_class = '" . $this->db->sql_escape($module_class) . "'";
+			$result = $this->db->sql_query_limit($sql, 1);
+			$row2 = $this->db->sql_fetchrow($result);
+			$this->db->sql_freeresult($result);
+
+			foreach ($mods as $mod_name)
+			{
+				$sql = 'SELECT *
+					FROM ' . MODULES_TABLE . "
+					WHERE module_langname = '" . $this->db->sql_escape($mod_name) . "'
+						AND module_class = '" . $this->db->sql_escape($module_class) . "'
+						AND module_basename <> ''";
+				$result = $this->db->sql_query_limit($sql, 1);
+				$row = $this->db->sql_fetchrow($result);
+				$this->db->sql_freeresult($result);
+
+				$module_data = array(
+					'module_basename'	=> $row['module_basename'],
+					'module_enabled'	=> (int) $row['module_enabled'],
+					'module_display'	=> (int) $row['module_display'],
+					'parent_id'			=> (int) $row2['module_id'],
+					'module_class'		=> $row['module_class'],
+					'module_langname'	=> $row['module_langname'],
+					'module_mode'		=> $row['module_mode'],
+					'module_auth'		=> $row['module_auth'],
+				);
+
+				$this->module_manager->update_module_data($module_data);
+
+				// Check for last sql error happened
+				if ($this->db->get_sql_error_triggered())
+				{
+					$error = $this->db->sql_error($this->db->get_sql_error_sql());
+					$this->iohandler->add_error_message('INST_ERR_DB', $error['message']);
+				}
+			}
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 1;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return 'TASK_ADD_MODULES';
+	}
+}
diff --git a/phpBB/phpbb/install/module/install_data/task/create_search_index.php b/phpBB/phpbb/install/module/install_data/task/create_search_index.php
new file mode 100644
index 0000000000..8a2f6aa1de
--- /dev/null
+++ b/phpBB/phpbb/install/module/install_data/task/create_search_index.php
@@ -0,0 +1,134 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\install_data\task;
+
+use phpbb\auth\auth;
+use phpbb\db\driver\driver_interface;
+use phpbb\event\dispatcher;
+use phpbb\config\config;
+use phpbb\install\helper\container_factory;
+use phpbb\language\language;
+use phpbb\search\fulltext_native;
+use phpbb\user;
+
+class create_search_index extends \phpbb\install\task_base
+{
+	/**
+	 * @var auth
+	 */
+	protected $auth;
+
+	/**
+	 * @var config
+	 */
+	protected $config;
+
+	/**
+	 * @var driver_interface
+	 */
+	protected $db;
+
+	/**
+	 * @var dispatcher
+	 */
+	protected $phpbb_dispatcher;
+
+	/**
+	 * @var language
+	 */
+	protected $language;
+
+	/**
+	 * @var user
+	 */
+	protected $user;
+
+	/**
+	 * @var string phpBB root path
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * @var string PHP file extension
+	 */
+	protected $php_ext;
+
+	/**
+	 * Constructor
+	 *
+	 * @param config				$config				phpBB config
+	 * @param container_factory		$container			Installer's DI container
+	 * @param string				$phpbb_root_path	phpBB root path
+	 * @param string				$php_ext			PHP file extension
+	 */
+	public function __construct(config $config, container_factory $container,
+								$phpbb_root_path, $php_ext)
+	{
+		$this->auth				= $container->get('auth');
+		$this->config			= $config;
+		$this->db				= $container->get('dbal.conn');
+		$this->language			= $container->get('language');
+		$this->phpbb_dispatcher = $container->get('dispatcher');
+		$this->user 			= $container->get('user');
+
+		parent::__construct(true);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		// Make sure fulltext native load update is set
+		$this->config->set('fulltext_native_load_upd', 1);
+
+		$error = false;
+		$search = new fulltext_native(
+			$error,
+			$this->phpbb_root_path,
+			$this->php_ext,
+			$this->auth,
+			$this->config,
+			$this->db,
+			$this->user,
+			$this->phpbb_dispatcher
+		);
+
+		$sql = 'SELECT post_id, post_subject, post_text, poster_id, forum_id
+			FROM ' . POSTS_TABLE;
+		$result = $this->db->sql_query($sql);
+
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			$search->index('post', $row['post_id'], $row['post_text'], $row['post_subject'], $row['poster_id'], $row['forum_id']);
+		}
+		$this->db->sql_freeresult($result);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 1;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return 'TASK_CREATE_SEARCH_INDEX';
+	}
+}
diff --git a/phpBB/phpbb/install/module/install_database/module.php b/phpBB/phpbb/install/module/install_database/module.php
new file mode 100644
index 0000000000..0d8b33087f
--- /dev/null
+++ b/phpBB/phpbb/install/module/install_database/module.php
@@ -0,0 +1,28 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\install_database;
+
+/**
+ * Installer module for database installation
+ */
+class module extends \phpbb\install\module_base
+{
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_navigation_stage_path()
+	{
+		return array('install', 0, 'install');
+	}
+}
diff --git a/phpBB/phpbb/install/module/install_database/task/add_config_settings.php b/phpBB/phpbb/install/module/install_database/task/add_config_settings.php
new file mode 100644
index 0000000000..ba439609ff
--- /dev/null
+++ b/phpBB/phpbb/install/module/install_database/task/add_config_settings.php
@@ -0,0 +1,368 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\install_database\task;
+
+use phpbb\install\exception\resource_limit_reached_exception;
+
+/**
+ * Create database schema
+ */
+class add_config_settings extends \phpbb\install\task_base
+{
+	/**
+	 * @var \phpbb\db\driver\driver_interface
+	 */
+	protected $db;
+
+	/**
+	 * @var \phpbb\filesystem\filesystem_interface
+	 */
+	protected $filesystem;
+
+	/**
+	 * @var \phpbb\install\helper\config
+	 */
+	protected $install_config;
+
+	/**
+	 * @var \phpbb\install\helper\iohandler\iohandler_interface
+	 */
+	protected $iohandler;
+
+	/**
+	 * @var \phpbb\language\language
+	 */
+	protected $language;
+
+	/**
+	 * @var \phpbb\passwords\manager
+	 */
+	protected $password_manager;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * @var string
+	 */
+	protected $config_table;
+
+	/**
+	 * @var string
+	 */
+	protected $user_table;
+
+	/**
+	 * @var string
+	 */
+	protected $topics_table;
+
+	/**
+	 * @var string
+	 */
+	protected $forums_table;
+
+	/**
+	 * @var string
+	 */
+	protected $posts_table;
+
+	/**
+	 * @var string
+	 */
+	protected $moderator_cache_table;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\filesystem\filesystem_interface				$filesystem			Filesystem service
+	 * @param \phpbb\install\helper\config							$install_config		Installer's config helper
+	 * @param \phpbb\install\helper\iohandler\iohandler_interface	$iohandler			Installer's input-output handler
+	 * @param \phpbb\install\helper\container_factory				$container			Installer's DI container
+	 * @param \phpbb\language\language								$language			Language service
+	 * @param string												$phpbb_root_path	Path to phpBB's root
+	 */
+	public function __construct(\phpbb\filesystem\filesystem_interface $filesystem,
+								\phpbb\install\helper\config $install_config,
+								\phpbb\install\helper\iohandler\iohandler_interface $iohandler,
+								\phpbb\install\helper\container_factory $container,
+								\phpbb\language\language $language,
+								$phpbb_root_path)
+	{
+		$this->db				= $container->get('dbal.conn');
+		$this->filesystem		= $filesystem;
+		$this->install_config	= $install_config;
+		$this->iohandler		= $iohandler;
+		$this->language			= $language;
+		$this->password_manager	= $container->get('passwords.manager');
+		$this->phpbb_root_path	= $phpbb_root_path;
+
+		// Table names
+		$this->config_table				= $container->get_parameter('tables.config');
+		$this->forums_table				= $container->get_parameter('tables.forums');
+		$this->topics_table				= $container->get_parameter('tables.topics');
+		$this->user_table				= $container->get_parameter('tables.users');
+		$this->moderator_cache_table	= $container->get_parameter('tables.moderator_cache');
+		$this->posts_table				= $container->get_parameter('tables.posts');
+
+		parent::__construct(true);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		$this->db->sql_return_on_error(true);
+
+		$server_name	= $this->install_config->get('server_name');
+		$current_time 	= time();
+		$user_ip		= phpbb_ip_normalise($this->iohandler->get_server_variable('REMOTE_ADDR'));
+		$user_ip		= ($user_ip === false) ? '' : $user_ip;
+		$referer		= $this->iohandler->get_server_variable('REFERER');
+
+		// Calculate cookie domain
+		$cookie_domain = $server_name;
+
+		if (strpos($cookie_domain, 'www.') === 0)
+		{
+			$cookie_domain = substr($cookie_domain, 3);
+		}
+
+		// Set default config and post data, this applies to all DB's
+		$sql_ary = array(
+			'INSERT INTO ' . $this->config_table . " (config_name, config_value)
+				VALUES ('board_startdate', '$current_time')",
+
+			'INSERT INTO ' . $this->config_table . " (config_name, config_value)
+				VALUES ('default_lang', '" . $this->db->sql_escape($this->install_config->get('default_lang')) . "')",
+
+			'UPDATE ' . $this->config_table . "
+				SET config_value = '" . $this->db->sql_escape($this->install_config->get('server_name')) . "'
+				WHERE config_name = 'server_name'",
+
+			'UPDATE ' . $this->config_table . "
+				SET config_value = '" . $this->db->sql_escape($this->install_config->get('server_port')) . "'
+				WHERE config_name = 'server_port'",
+
+			'UPDATE ' . $this->config_table . "
+				SET config_value = '" . $this->db->sql_escape($this->install_config->get('board_email')) . "'
+				WHERE config_name = 'board_email'",
+
+			'UPDATE ' . $this->config_table . "
+				SET config_value = '" . $this->db->sql_escape($this->install_config->get('board_email')) . "'
+				WHERE config_name = 'board_contact'",
+
+			'UPDATE ' . $this->config_table . "
+				SET config_value = '" . $this->db->sql_escape($cookie_domain) . "'
+				WHERE config_name = 'cookie_domain'",
+
+			'UPDATE ' . $this->config_table . "
+				SET config_value = '" . $this->db->sql_escape($this->language->lang('default_dateformat')) . "'
+				WHERE config_name = 'default_dateformat'",
+
+			'UPDATE ' . $this->config_table . "
+				SET config_value = '" . $this->db->sql_escape($this->install_config->get('email_enable')) . "'
+				WHERE config_name = 'email_enable'",
+
+			'UPDATE ' . $this->config_table . "
+				SET config_value = '" . $this->db->sql_escape($this->install_config->get('smtp_delivery')) . "'
+				WHERE config_name = 'smtp_delivery'",
+
+			'UPDATE ' . $this->config_table . "
+				SET config_value = '" . $this->db->sql_escape($this->install_config->get('smtp_host')) . "'
+				WHERE config_name = 'smtp_host'",
+
+			'UPDATE ' . $this->config_table . "
+				SET config_value = '" . $this->db->sql_escape($this->install_config->get('smtp_port')) . "'
+				WHERE config_name = 'smtp_port'",
+
+			'UPDATE ' . $this->config_table . "
+				SET config_value = '" . $this->db->sql_escape($this->install_config->get('smtp_auth')) . "'
+				WHERE config_name = 'smtp_auth_method'",
+
+			'UPDATE ' . $this->config_table . "
+				SET config_value = '" . $this->db->sql_escape($this->install_config->get('smtp_user')) . "'
+				WHERE config_name = 'smtp_username'",
+
+			'UPDATE ' . $this->config_table . "
+				SET config_value = '" . $this->db->sql_escape($this->install_config->get('smtp_pass')) . "'
+				WHERE config_name = 'smtp_password'",
+
+			'UPDATE ' . $this->config_table . "
+				SET config_value = '" . $this->db->sql_escape($this->install_config->get('cookie_secure')) . "'
+				WHERE config_name = 'cookie_secure'",
+
+			'UPDATE ' . $this->config_table . "
+				SET config_value = '" . $this->db->sql_escape($this->install_config->get('force_server_vars')) . "'
+				WHERE config_name = 'force_server_vars'",
+
+			'UPDATE ' . $this->config_table . "
+				SET config_value = '" . $this->db->sql_escape($this->install_config->get('script_path')) . "'
+				WHERE config_name = 'script_path'",
+
+			'UPDATE ' . $this->config_table . "
+				SET config_value = '" . $this->db->sql_escape($this->install_config->get('server_protocol')) . "'
+				WHERE config_name = 'server_protocol'",
+
+			'UPDATE ' . $this->config_table . "
+				SET config_value = '" . $this->db->sql_escape($this->install_config->get('admin_name')) . "'
+				WHERE config_name = 'newest_username'",
+
+			'UPDATE ' . $this->config_table . "
+				SET config_value = '" . md5(mt_rand()) . "'
+				WHERE config_name = 'avatar_salt'",
+
+			'UPDATE ' . $this->config_table . "
+				SET config_value = '" . md5(mt_rand()) . "'
+				WHERE config_name = 'plupload_salt'",
+
+			'UPDATE ' . $this->config_table . "
+				SET config_value = '" . $this->db->sql_escape($this->install_config->get('board_name')) . "'
+				WHERE config_name = 'sitename'",
+
+			'UPDATE ' . $this->config_table . "
+				SET config_value = '" . $this->db->sql_escape($this->install_config->get('board_description')) . "'
+				WHERE config_name = 'site_desc'",
+
+			'UPDATE ' . $this->user_table . "
+				SET username = '" . $this->db->sql_escape($this->install_config->get('admin_name')) . "',
+					user_password='" . $this->password_manager->hash($this->install_config->get('admin_passwd')) . "',
+					user_ip = '" . $this->db->sql_escape($user_ip) . "',
+					user_lang = '" . $this->db->sql_escape($this->install_config->get('user_language', 'en')) . "',
+					user_email='" . $this->db->sql_escape($this->install_config->get('board_email')) . "',
+					user_dateformat='" . $this->db->sql_escape($this->language->lang('default_dateformat')) . "',
+					user_email_hash = " . $this->db->sql_escape(phpbb_email_hash($this->install_config->get('board_email'))) . ",
+					username_clean = '" . $this->db->sql_escape(utf8_clean_string($this->install_config->get('admin_name'))) . "'
+				WHERE username = 'Admin'",
+
+			'UPDATE ' . $this->moderator_cache_table . "
+				SET username = '" . $this->db->sql_escape($this->install_config->get('admin_name')) . "'
+				WHERE username = 'Admin'",
+
+			'UPDATE ' . $this->forums_table . "
+				SET forum_last_poster_name = '" . $this->db->sql_escape($this->install_config->get('admin_name')) . "'
+				WHERE forum_last_poster_name = 'Admin'",
+
+			'UPDATE ' . $this->topics_table . "
+				SET topic_first_poster_name = '" . $this->db->sql_escape($this->install_config->get('admin_name')) . "',
+				topic_last_poster_name = '" . $this->db->sql_escape($this->install_config->get('admin_name')) . "'
+				WHERE topic_first_poster_name = 'Admin'
+					OR topic_last_poster_name = 'Admin'",
+
+			'UPDATE ' . $this->user_table . "
+				SET user_regdate = $current_time",
+
+			'UPDATE ' . $this->posts_table . "
+				SET post_time = $current_time, poster_ip = '" . $this->db->sql_escape($user_ip) . "'",
+
+			'UPDATE ' . $this->topics_table . "
+				SET topic_time = $current_time, topic_last_post_time = $current_time",
+
+			'UPDATE ' . $this->forums_table . "
+				SET forum_last_post_time = $current_time",
+
+			'UPDATE ' . $this->config_table . "
+				SET config_value = '" . $this->db->sql_escape($this->db->sql_server_info(true)) . "'
+				WHERE config_name = 'dbms_version'",
+		);
+
+		if (@extension_loaded('gd'))
+		{
+			$sql_ary[] = 'UPDATE ' . $this->config_table . "
+				SET config_value = 'core.captcha.plugins.gd'
+				WHERE config_name = 'captcha_plugin'";
+
+			$sql_ary[] = 'UPDATE ' . $this->config_table . "
+				SET config_value = '1'
+				WHERE config_name = 'captcha_gd'";
+		}
+
+		$ref = substr($referer, strpos($referer, '://') + 3);
+		if (!(stripos($ref, $server_name) === 0))
+		{
+			$sql_ary[] = 'UPDATE ' . $this->config_table . "
+				SET config_value = '0'
+				WHERE config_name = 'referer_validation'";
+		}
+
+		// We set a (semi-)unique cookie name to bypass login issues related to the cookie name.
+		$cookie_name = 'phpbb3_';
+		$rand_str = md5(mt_rand());
+		$rand_str = str_replace('0', 'z', base_convert($rand_str, 16, 35));
+		$rand_str = substr($rand_str, 0, 5);
+		$cookie_name .= strtolower($rand_str);
+
+		$sql_ary[] = 'UPDATE ' . $this->config_table . "
+			SET config_value = '" . $this->db->sql_escape($cookie_name) . "'
+			WHERE config_name = 'cookie_name'";
+
+		// Disable avatars if upload directory is not writable
+		if (!$this->filesystem->is_writable($this->phpbb_root_path . 'images/avatars/upload/'))
+		{
+			$sql_ary[] = 'UPDATE ' . $this->config_table . "
+				SET config_value = '0'
+				WHERE config_name = 'allow_avatar'";
+
+			$sql_ary[] = 'UPDATE ' . $this->config_table . "
+				SET config_value = '0'
+				WHERE config_name = 'allow_avatar_upload'";
+		}
+
+		$i = $this->install_config->get('add_config_settings_index', 0);
+		$total = count($sql_ary);
+		$sql_ary = array_slice($sql_ary, $i);
+
+		foreach ($sql_ary as $sql)
+		{
+			if (!$this->db->sql_query($sql))
+			{
+				$error = $this->db->sql_error($this->db->get_sql_error_sql());
+				$this->iohandler->add_error_message('INST_ERR_DB', $error['message']);
+			}
+
+			$i++;
+
+			// Stop execution if resource limit is reached
+			if ($this->install_config->get_time_remaining() <= 0 || $this->install_config->get_memory_remaining() <= 0)
+			{
+				break;
+			}
+		}
+
+		if ($i < $total)
+		{
+			$this->install_config->set('add_config_settings_index', $i);
+			throw new resource_limit_reached_exception();
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 1;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return 'TASK_ADD_CONFIG_SETTINGS';
+	}
+}
diff --git a/phpBB/phpbb/install/module/install_database/task/add_default_data.php b/phpBB/phpbb/install/module/install_database/task/add_default_data.php
new file mode 100644
index 0000000000..c05e5321fb
--- /dev/null
+++ b/phpBB/phpbb/install/module/install_database/task/add_default_data.php
@@ -0,0 +1,184 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\install_database\task;
+
+use phpbb\install\exception\resource_limit_reached_exception;
+
+/**
+ * Create database schema
+ */
+class add_default_data extends \phpbb\install\task_base
+{
+	/**
+	 * @var \phpbb\db\driver\driver_interface
+	 */
+	protected $db;
+
+	/**
+	 * @var \phpbb\install\helper\database
+	 */
+	protected $database_helper;
+
+	/**
+	 * @var \phpbb\install\helper\config
+	 */
+	protected $config;
+
+	/**
+	 * @var \phpbb\install\helper\iohandler\iohandler_interface
+	 */
+	protected $iohandler;
+
+	/**
+	 * @var \phpbb\language\language
+	 */
+	protected $language;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\install\helper\database						$db_helper	Installer's database helper
+	 * @param \phpbb\install\helper\config							$config		Installer config
+	 * @param \phpbb\install\helper\iohandler\iohandler_interface	$iohandler	Installer's input-output handler
+	 * @param \phpbb\install\helper\container_factory				$container	Installer's DI container
+	 * @param \phpbb\language\language								$language	Language service
+	 * @param string												$root_path	Root path of phpBB
+	 */
+	public function __construct(\phpbb\install\helper\database $db_helper,
+								\phpbb\install\helper\config $config,
+								\phpbb\install\helper\iohandler\iohandler_interface $iohandler,
+								\phpbb\install\helper\container_factory $container,
+								\phpbb\language\language $language,
+								$root_path)
+	{
+		$this->db				= $container->get('dbal.conn.driver');
+		$this->database_helper	= $db_helper;
+		$this->config			= $config;
+		$this->iohandler		= $iohandler;
+		$this->language			= $language;
+		$this->phpbb_root_path	= $root_path;
+
+		parent::__construct(true);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		$this->db->sql_return_on_error(true);
+
+		$table_prefix = $this->config->get('table_prefix');
+		$dbms = $this->config->get('dbms');
+		$dbms_info = $this->database_helper->get_available_dbms($dbms);
+
+		// Get schema data from file
+		$sql_query = @file_get_contents($this->phpbb_root_path . 'install/schemas/schema_data.sql');
+
+		// Clean up SQL
+		$sql_query = $this->replace_dbms_specific_sql($sql_query);
+		$sql_query = preg_replace('# phpbb_([^\s]*) #i', ' ' . $table_prefix . '\1 ', $sql_query);
+		$sql_query = preg_replace_callback('#\{L_([A-Z0-9\-_]*)\}#s', array($this, 'lang_replace_callback'), $sql_query);
+		$sql_query = $this->database_helper->remove_comments($sql_query);
+		$sql_query = $this->database_helper->split_sql_file($sql_query, $dbms_info[$dbms]['DELIM']);
+
+		$i = $this->config->get('add_default_data_index', 0);
+		$total = count($sql_query);
+		$sql_query = array_slice($sql_query, $i);
+
+		foreach ($sql_query as $sql)
+		{
+			if (!$this->db->sql_query($sql))
+			{
+				$error = $this->db->sql_error($this->db->get_sql_error_sql());
+				$this->iohandler->add_error_message('INST_ERR_DB', $error['message']);
+			}
+
+			$i++;
+
+			// Stop execution if resource limit is reached
+			if ($this->config->get_time_remaining() <= 0 || $this->config->get_memory_remaining() <= 0)
+			{
+				break;
+			}
+		}
+
+		$this->config->set('add_default_data_index', $i);
+
+		if ($i < $total)
+		{
+			throw new resource_limit_reached_exception();
+		}
+	}
+
+	/**
+	 * Process DB specific SQL
+	 *
+	 * @return string
+	 */
+	protected function replace_dbms_specific_sql($query)
+	{
+		if ($this->db instanceof \phpbb\db\driver\mssql_base)
+		{
+			$query = preg_replace('#\# MSSQL IDENTITY (phpbb_[a-z_]+) (ON|OFF) \##s', 'SET IDENTITY_INSERT \1 \2;', $query);
+		}
+		else if ($this->db instanceof \phpbb\db\driver\postgres)
+		{
+			$query = preg_replace('#\# POSTGRES (BEGIN|COMMIT) \##s', '\1; ', $query);
+		}
+		else if ($this->db instanceof \phpbb\db\driver\mysql_base)
+		{
+			$query = str_replace('\\', '\\\\', $query);
+		}
+
+		return $query;
+	}
+
+	/**
+	 * Callback function for language replacing
+	 *
+	 * @param array	$matches
+	 * @return string
+	 */
+	public function lang_replace_callback($matches)
+	{
+		if (!empty($matches[1]))
+		{
+			return $this->db->sql_escape($this->language->lang($matches[1]));
+		}
+
+		return '';
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 1;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return 'TASK_ADD_DEFAULT_DATA';
+	}
+}
diff --git a/phpBB/phpbb/install/module/install_database/task/add_tables.php b/phpBB/phpbb/install/module/install_database/task/add_tables.php
new file mode 100644
index 0000000000..dc814f36ef
--- /dev/null
+++ b/phpBB/phpbb/install/module/install_database/task/add_tables.php
@@ -0,0 +1,151 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\install_database\task;
+
+use phpbb\install\exception\resource_limit_reached_exception;
+
+/**
+ * Create tables
+ */
+class add_tables extends \phpbb\install\task_base
+{
+	/**
+	 * @var \phpbb\install\helper\config
+	 */
+	protected $config;
+
+	/**
+	 * @var \phpbb\db\driver\driver_interface
+	 */
+	protected $db;
+
+	/**
+	 * @var \phpbb\db\tools\tools_interface
+	 */
+	protected $db_tools;
+
+	/**
+	 * @var \phpbb\filesystem\filesystem_interface
+	 */
+	protected $filesystem;
+
+	/**
+	 * @var string
+	 */
+	protected $schema_file_path;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\install\helper\config				$config
+	 * @param \phpbb\install\helper\database			$db_helper
+	 * @param \phpbb\filesystem\filesystem_interface	$filesystem
+	 * @param string									$phpbb_root_path
+	 */
+	public function __construct(\phpbb\install\helper\config $config,
+								\phpbb\install\helper\database $db_helper,
+								\phpbb\filesystem\filesystem_interface $filesystem,
+								$phpbb_root_path)
+	{
+		$dbms = $db_helper->get_available_dbms($config->get('dbms'));
+		$dbms = $dbms[$config->get('dbms')]['DRIVER'];
+		$factory = new \phpbb\db\tools\factory();
+
+		$this->db				= new $dbms();
+		$this->db->sql_connect(
+			$config->get('dbhost'),
+			$config->get('dbuser'),
+			$config->get('dbpasswd'),
+			$config->get('dbname'),
+			$config->get('dbport'),
+			false,
+			false
+		);
+
+		$this->config			= $config;
+		$this->db_tools			= $factory->get($this->db);
+		$this->filesystem		= $filesystem;
+		$this->schema_file_path	= $phpbb_root_path . 'store/schema.json';
+
+		parent::__construct(true);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		$this->db->sql_return_on_error(true);
+
+		$table_prefix = $this->config->get('table_prefix');
+		$change_prefix = $this->config->get('change_table_prefix', true);
+
+		if (!defined('CONFIG_TABLE'))
+		{
+			// CONFIG_TABLE is required by sql_create_index() to check the
+			// length of index names. However table_prefix is not defined
+			// here yet, so we need to create the constant ourselves.
+			define('CONFIG_TABLE', $table_prefix . 'config');
+		}
+
+		$db_table_schema = @file_get_contents($this->schema_file_path);
+		$db_table_schema = json_decode($db_table_schema, true);
+		$total = count($db_table_schema);
+		$i = $this->config->get('add_table_index', 0);
+		$db_table_schema = array_slice($db_table_schema, $i);
+
+		foreach ($db_table_schema as $table_name => $table_data)
+		{
+			$i++;
+
+			$this->db_tools->sql_create_table(
+				( ($change_prefix) ? ($table_prefix . substr($table_name, 6)) : $table_name ),
+				$table_data
+			);
+
+			// Stop execution if resource limit is reached
+			if ($this->config->get_time_remaining() <= 0 || $this->config->get_memory_remaining() <= 0)
+			{
+				break;
+			}
+		}
+
+		$this->config->set('add_table_index', $i);
+
+		if ($i < $total)
+		{
+			throw new resource_limit_reached_exception();
+		}
+		else
+		{
+			@unlink($this->schema_file_path);
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 1;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return 'TASK_CREATE_TABLES';
+	}
+}
diff --git a/phpBB/phpbb/install/module/install_database/task/create_schema.php b/phpBB/phpbb/install/module/install_database/task/create_schema.php
new file mode 100644
index 0000000000..a5635d5dbe
--- /dev/null
+++ b/phpBB/phpbb/install/module/install_database/task/create_schema.php
@@ -0,0 +1,234 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\install_database\task;
+
+use phpbb\install\exception\resource_limit_reached_exception;
+
+/**
+ * Create database schema
+ */
+class create_schema extends \phpbb\install\task_base
+{
+	/**
+	 * @var \phpbb\install\helper\config
+	 */
+	protected $config;
+
+	/**
+	 * @var \phpbb\db\driver\driver_interface
+	 */
+	protected $db;
+
+	/**
+	 * @var \phpbb\db\tools\tools_interface
+	 */
+	protected $db_tools;
+
+	/**
+	 * @var \phpbb\install\helper\database
+	 */
+	protected $database_helper;
+
+	/**
+	 * @var \phpbb\filesystem\filesystem_interface
+	 */
+	protected $filesystem;
+
+	/**
+	 * @var \phpbb\install\helper\iohandler\iohandler_interface
+	 */
+	protected $iohandler;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * @var string
+	 */
+	protected $php_ext;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\install\helper\config							$config				Installer's config provider
+	 * @param \phpbb\install\helper\database						$db_helper			Installer's database helper
+	 * @param \phpbb\filesystem\filesystem_interface				$filesystem			Filesystem service
+	 * @param \phpbb\install\helper\iohandler\iohandler_interface	$iohandler			Installer's input-output handler
+	 * @param string												$phpbb_root_path	Path phpBB's root
+	 * @param string												$php_ext			Extension of PHP files
+	 */
+	public function __construct(\phpbb\install\helper\config $config,
+								\phpbb\install\helper\database $db_helper,
+								\phpbb\filesystem\filesystem_interface $filesystem,
+								\phpbb\install\helper\iohandler\iohandler_interface $iohandler,
+								$phpbb_root_path,
+								$php_ext)
+	{
+		$dbms = $db_helper->get_available_dbms($config->get('dbms'));
+		$dbms = $dbms[$config->get('dbms')]['DRIVER'];
+		$factory = new \phpbb\db\tools\factory();
+
+		$this->db				= new $dbms();
+		$this->db->sql_connect(
+			$config->get('dbhost'),
+			$config->get('dbuser'),
+			$config->get('dbpasswd'),
+			$config->get('dbname'),
+			$config->get('dbport'),
+			false,
+			false
+		);
+
+		$this->config			= $config;
+		$this->db_tools			= $factory->get($this->db);
+		$this->database_helper	= $db_helper;
+		$this->filesystem		= $filesystem;
+		$this->iohandler		= $iohandler;
+		$this->phpbb_root_path	= $phpbb_root_path;
+		$this->php_ext			= $php_ext;
+
+		parent::__construct(true);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		// As this task may take a large amount of time to complete refreshing the page might be necessary for some
+		// server configurations with limited resources
+		if (!$this->config->get('pre_schema_forced_refresh'))
+		{
+			if ($this->config->get_time_remaining() < 5)
+			{
+				$this->config->set('pre_schema_forced_refresh', true);
+				throw new resource_limit_reached_exception();
+			}
+		}
+
+		$this->db->sql_return_on_error(true);
+
+		$dbms = $this->config->get('dbms');
+		$dbms_info = $this->database_helper->get_available_dbms($dbms);
+		$schema_name = $dbms_info[$dbms]['SCHEMA'];
+		$delimiter = $dbms_info[$dbms]['DELIM'];
+		$table_prefix = $this->config->get('table_prefix');
+
+		if ($dbms === 'mysql')
+		{
+			if (version_compare($this->db->sql_server_info(true), '4.1.3', '>='))
+			{
+				$schema_name .= '_41';
+			}
+			else
+			{
+				$schema_name .= '_40';
+			}
+		}
+
+		$db_schema_path = $this->phpbb_root_path . 'install/schemas/' . $schema_name . '_schema.sql';
+
+		// Load database vendor specific code if there is any
+		if ($this->filesystem->exists($db_schema_path))
+		{
+			$sql_query = @file_get_contents($db_schema_path);
+			$sql_query = preg_replace('#phpbb_#i', $table_prefix, $sql_query);
+			$sql_query = $this->database_helper->remove_comments($sql_query);
+			$sql_query = $this->database_helper->split_sql_file($sql_query, $delimiter);
+
+			foreach ($sql_query as $sql)
+			{
+				if (!$this->db->sql_query($sql))
+				{
+					$error = $this->db->sql_error($this->db->get_sql_error_sql());
+					$this->iohandler->add_error_message('INST_ERR_DB', $error['message']);
+				}
+			}
+
+			unset($sql_query);
+		}
+
+		$change_prefix = false;
+
+		// Generate database schema
+		if ($this->filesystem->exists($this->phpbb_root_path . 'install/schemas/schema.json'))
+		{
+			$db_table_schema = @file_get_contents($this->phpbb_root_path . 'install/schemas/schema.json');
+			$db_table_schema = json_decode($db_table_schema, true);
+			$change_prefix = true;
+		}
+		else
+		{
+			global $table_prefix;
+
+			$table_prefix = $this->config->get('table_prefix');
+
+			if (!defined('CONFIG_TABLE'))
+			{
+				// We need to include the constants file for the table constants
+				// when we generate the schema from the migration files.
+				include ($this->phpbb_root_path . 'includes/constants.' . $this->php_ext);
+			}
+
+			$finder = new \phpbb\finder($this->filesystem, $this->phpbb_root_path, null, $this->php_ext);
+			$migrator_classes = $finder->core_path('phpbb/db/migration/data/')->get_classes();
+			$factory = new \phpbb\db\tools\factory();
+			$db_tools = $factory->get($this->db, true);
+			$schema_generator = new \phpbb\db\migration\schema_generator(
+				$migrator_classes,
+				new \phpbb\config\config(array()),
+				$this->db,
+				$db_tools,
+				$this->phpbb_root_path,
+				$this->php_ext,
+				$table_prefix
+			);
+			$db_table_schema = $schema_generator->get_schema();
+		}
+
+		if (!defined('CONFIG_TABLE'))
+		{
+			// CONFIG_TABLE is required by sql_create_index() to check the
+			// length of index names. However table_prefix is not defined
+			// here yet, so we need to create the constant ourselves.
+			define('CONFIG_TABLE', $table_prefix . 'config');
+		}
+
+		foreach ($db_table_schema as $table_name => $table_data)
+		{
+			$this->db_tools->sql_create_table(
+				( ($change_prefix) ? ($table_prefix . substr($table_name, 6)) : $table_name ),
+				$table_data
+			);
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 1;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return 'TASK_CREATE_DATABASE_SCHEMA';
+	}
+}
diff --git a/phpBB/phpbb/install/module/install_database/task/create_schema_file.php b/phpBB/phpbb/install/module/install_database/task/create_schema_file.php
new file mode 100644
index 0000000000..b6d6ece17f
--- /dev/null
+++ b/phpBB/phpbb/install/module/install_database/task/create_schema_file.php
@@ -0,0 +1,164 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\install_database\task;
+
+use phpbb\install\exception\resource_limit_reached_exception;
+
+/**
+ * Create database schema
+ */
+class create_schema_file extends \phpbb\install\task_base
+{
+	/**
+	 * @var \phpbb\install\helper\config
+	 */
+	protected $config;
+
+	/**
+	 * @var \phpbb\db\driver\driver_interface
+	 */
+	protected $db;
+
+	/**
+	 * @var \phpbb\filesystem\filesystem_interface
+	 */
+	protected $filesystem;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * @var string
+	 */
+	protected $php_ext;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\install\helper\config							$config				Installer's config provider
+	 * @param \phpbb\install\helper\database						$db_helper			Installer's database helper
+	 * @param \phpbb\filesystem\filesystem_interface				$filesystem			Filesystem service
+	 * @param string												$phpbb_root_path	Path phpBB's root
+	 * @param string												$php_ext			Extension of PHP files
+	 */
+	public function __construct(\phpbb\install\helper\config $config,
+								\phpbb\install\helper\database $db_helper,
+								\phpbb\filesystem\filesystem_interface $filesystem,
+								$phpbb_root_path,
+								$php_ext)
+	{
+		$dbms = $db_helper->get_available_dbms($config->get('dbms'));
+		$dbms = $dbms[$config->get('dbms')]['DRIVER'];
+
+		$this->db				= new $dbms();
+		$this->db->sql_connect(
+			$config->get('dbhost'),
+			$config->get('dbuser'),
+			$config->get('dbpasswd'),
+			$config->get('dbname'),
+			$config->get('dbport'),
+			false,
+			false
+		);
+
+		$this->config			= $config;
+		$this->filesystem		= $filesystem;
+		$this->phpbb_root_path	= $phpbb_root_path;
+		$this->php_ext			= $php_ext;
+
+		parent::__construct(true);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		// Generate database schema
+		if ($this->filesystem->exists($this->phpbb_root_path . 'install/schemas/schema.json'))
+		{
+			$db_table_schema = @file_get_contents($this->phpbb_root_path . 'install/schemas/schema.json');
+			$this->config->set('change_table_prefix', true);
+		}
+		else
+		{
+			global $table_prefix;
+
+			// As this task may take a large amount of time to complete refreshing the page might be necessary for some
+			// server configurations with limited resources
+			if (!$this->config->get('pre_schema_forced_refresh', false))
+			{
+				if ($this->config->get_time_remaining() < 5)
+				{
+					$this->config->set('pre_schema_forced_refresh', true);
+					throw new resource_limit_reached_exception();
+				}
+			}
+
+			$table_prefix = $this->config->get('table_prefix');
+
+			if (!defined('CONFIG_TABLE'))
+			{
+				// We need to include the constants file for the table constants
+				// when we generate the schema from the migration files.
+				include ($this->phpbb_root_path . 'includes/constants.' . $this->php_ext);
+			}
+
+			$finder = new \phpbb\finder($this->filesystem, $this->phpbb_root_path, null, $this->php_ext);
+			$migrator_classes = $finder->core_path('phpbb/db/migration/data/')->get_classes();
+			$factory = new \phpbb\db\tools\factory();
+			$db_tools = $factory->get($this->db, true);
+			$schema_generator = new \phpbb\db\migration\schema_generator(
+				$migrator_classes,
+				new \phpbb\config\config(array()),
+				$this->db,
+				$db_tools,
+				$this->phpbb_root_path,
+				$this->php_ext,
+				$table_prefix
+			);
+			$db_table_schema = $schema_generator->get_schema();
+			$db_table_schema = json_encode($db_table_schema, JSON_PRETTY_PRINT);
+
+			$this->config->set('change_table_prefix', false);
+		}
+
+		$fp = @fopen($this->phpbb_root_path . 'store/schema.json', 'wb');
+		if (!$fp)
+		{
+			throw new \Exception('INST_SCHEMA_FILE_NOT_WRITABLE');
+		}
+
+		fwrite($fp, $db_table_schema);
+		fclose($fp);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 1;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return 'TASK_CREATE_DATABASE_SCHEMA_FILE';
+	}
+}
diff --git a/phpBB/phpbb/install/module/install_database/task/set_up_database.php b/phpBB/phpbb/install/module/install_database/task/set_up_database.php
new file mode 100644
index 0000000000..49c8ea23ad
--- /dev/null
+++ b/phpBB/phpbb/install/module/install_database/task/set_up_database.php
@@ -0,0 +1,164 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\install_database\task;
+
+/**
+ * Set up database for table generation
+ */
+class set_up_database extends \phpbb\install\task_base
+{
+	/**
+	 * @var \phpbb\install\helper\config
+	 */
+	protected $config;
+
+	/**
+	 * @var \phpbb\db\driver\driver_interface
+	 */
+	protected $db;
+
+	/**
+	 * @var \phpbb\install\helper\database
+	 */
+	protected $database_helper;
+
+	/**
+	 * @var \phpbb\filesystem\filesystem_interface
+	 */
+	protected $filesystem;
+
+	/**
+	 * @var \phpbb\install\helper\iohandler\iohandler_interface
+	 */
+	protected $iohandler;
+
+	/**
+	 * @var string
+	 */
+	protected $schema_file_path;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\install\helper\config							$config
+	 * @param \phpbb\install\helper\database						$db_helper
+	 * @param \phpbb\filesystem\filesystem_interface				$filesystem
+	 * @param \phpbb\install\helper\iohandler\iohandler_interface	$iohandler
+	 * @param string												$phpbb_root_path
+	 */
+	public function __construct(\phpbb\install\helper\config $config,
+								\phpbb\install\helper\database $db_helper,
+								\phpbb\filesystem\filesystem_interface $filesystem,
+								\phpbb\install\helper\iohandler\iohandler_interface $iohandler,
+								$phpbb_root_path)
+	{
+		$dbms = $db_helper->get_available_dbms($config->get('dbms'));
+		$dbms = $dbms[$config->get('dbms')]['DRIVER'];
+
+		$this->db				= new $dbms();
+		$this->db->sql_connect(
+			$config->get('dbhost'),
+			$config->get('dbuser'),
+			$config->get('dbpasswd'),
+			$config->get('dbname'),
+			$config->get('dbport'),
+			false,
+			false
+		);
+
+		$this->config			= $config;
+		$this->database_helper	= $db_helper;
+		$this->filesystem		= $filesystem;
+		$this->iohandler		= $iohandler;
+		$this->phpbb_root_path	= $phpbb_root_path;
+
+		parent::__construct(false);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function check_requirements()
+	{
+		$dbms = $this->config->get('dbms');
+		$dbms_info = $this->database_helper->get_available_dbms($dbms);
+		$schema_name = $dbms_info[$dbms]['SCHEMA'];
+
+		if ($dbms === 'mysql')
+		{
+			if (version_compare($this->db->sql_server_info(true), '4.1.3', '>='))
+			{
+				$schema_name .= '_41';
+			}
+			else
+			{
+				$schema_name .= '_40';
+			}
+		}
+
+		$this->schema_file_path = $this->phpbb_root_path . 'install/schemas/' . $schema_name . '_schema.sql';
+
+		return $this->filesystem->exists($this->schema_file_path);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		$this->db->sql_return_on_error(true);
+
+		$dbms = $this->config->get('dbms');
+		$dbms_info = $this->database_helper->get_available_dbms($dbms);
+		$delimiter = $dbms_info[$dbms]['DELIM'];
+		$table_prefix = $this->config->get('table_prefix');
+
+		$sql_query = @file_get_contents($this->schema_file_path);
+		$sql_query = preg_replace('#phpbb_#i', $table_prefix, $sql_query);
+		$sql_query = $this->database_helper->remove_comments($sql_query);
+		$sql_query = $this->database_helper->split_sql_file($sql_query, $delimiter);
+
+		foreach ($sql_query as $sql)
+		{
+			if (!$this->db->sql_query($sql))
+			{
+				$error = $this->db->sql_error($this->db->get_sql_error_sql());
+				$this->iohandler->add_error_message('INST_ERR_DB', $error['message']);
+			}
+		}
+
+		unset($sql_query);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 1;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return 'TASK_SETUP_DATABASE';
+	}
+}
diff --git a/phpBB/phpbb/install/module/install_filesystem/module.php b/phpBB/phpbb/install/module/install_filesystem/module.php
new file mode 100644
index 0000000000..7215449664
--- /dev/null
+++ b/phpBB/phpbb/install/module/install_filesystem/module.php
@@ -0,0 +1,28 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\install_filesystem;
+
+/**
+ * Installer module for filesystem installation
+ */
+class module extends \phpbb\install\module_base
+{
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_navigation_stage_path()
+	{
+		return array('install', 0, 'install');
+	}
+}
diff --git a/phpBB/phpbb/install/module/install_filesystem/task/create_config_file.php b/phpBB/phpbb/install/module/install_filesystem/task/create_config_file.php
new file mode 100644
index 0000000000..5bc425b929
--- /dev/null
+++ b/phpBB/phpbb/install/module/install_filesystem/task/create_config_file.php
@@ -0,0 +1,244 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\install_filesystem\task;
+
+use phpbb\install\exception\user_interaction_required_exception;
+
+/**
+ * Dumps config file
+ */
+class create_config_file extends \phpbb\install\task_base
+{
+	/**
+	 * @var \phpbb\filesystem\filesystem_interface
+	 */
+	protected $filesystem;
+
+	/**
+	 * @var \phpbb\install\helper\database
+	 */
+	protected $db_helper;
+
+	/**
+	 * @var \phpbb\install\helper\config
+	 */
+	protected $install_config;
+
+	/**
+	 * @var \phpbb\install\helper\iohandler\iohandler_interface
+	 */
+	protected $iohandler;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * @var string
+	 */
+	protected $php_ext;
+
+	/**
+	 * @var array
+	 */
+	protected $options;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\filesystem\filesystem_interface				$filesystem
+	 * @param \phpbb\install\helper\config							$install_config
+	 * @param \phpbb\install\helper\database						$db_helper
+	 * @param \phpbb\install\helper\iohandler\iohandler_interface	$iohandler
+	 * @param string												$phpbb_root_path
+	 * @param string												$php_ext
+	 * @param array													$options
+	 */
+	public function __construct(\phpbb\filesystem\filesystem_interface $filesystem,
+								\phpbb\install\helper\config $install_config,
+								\phpbb\install\helper\database $db_helper,
+								\phpbb\install\helper\iohandler\iohandler_interface $iohandler,
+								$phpbb_root_path,
+								$php_ext,
+								$options = array())
+	{
+		$this->install_config	= $install_config;
+		$this->db_helper		= $db_helper;
+		$this->filesystem		= $filesystem;
+		$this->iohandler		= $iohandler;
+		$this->phpbb_root_path	= $phpbb_root_path;
+		$this->php_ext			= $php_ext;
+		$this->options			= array_merge(array(
+			'debug' => false,
+			'debug_container' => false,
+			'environment' => null,
+		), $options);
+
+		parent::__construct(true);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		$config_written = true;
+
+		// Create config.php
+		$path_to_config = $this->phpbb_root_path . 'config.' . $this->php_ext;
+
+		$fp = @fopen($path_to_config, 'w');
+		if (!$fp)
+		{
+			$config_written = false;
+		}
+
+		$config_content = $this->get_config_data($this->options['debug'], $this->options['debug_container'], $this->options['environment']);
+
+		if (!@fwrite($fp, $config_content))
+		{
+			$config_written = false;
+		}
+
+		@fclose($fp);
+
+		// chmod config.php to be only readable
+		if ($config_written)
+		{
+			try
+			{
+				$this->filesystem->phpbb_chmod($path_to_config, \phpbb\filesystem\filesystem_interface::CHMOD_READ);
+			}
+			catch (\phpbb\filesystem\exception\filesystem_exception $e)
+			{
+				// Do nothing, the user will get a notice later
+			}
+		}
+		else
+		{
+			$this->iohandler->add_error_message('UNABLE_TO_WRITE_CONFIG_FILE');
+			throw new user_interaction_required_exception();
+		}
+
+		// Create a lock file to indicate that there is an install in progress
+		$fp = @fopen($this->phpbb_root_path . 'cache/install_lock', 'wb');
+		if ($fp === false)
+		{
+			// We were unable to create the lock file - abort
+			$this->iohandler->add_error_message('UNABLE_TO_WRITE_LOCK');
+			throw new user_interaction_required_exception();
+		}
+		@fclose($fp);
+
+		try
+		{
+			$this->filesystem->phpbb_chmod($this->phpbb_root_path . 'cache/install_lock', 0777);
+		}
+		catch (\phpbb\filesystem\exception\filesystem_exception $e)
+		{
+			// Do nothing, the user will get a notice later
+		}
+	}
+
+	/**
+	 * Returns the content which should be dumped to config.php
+	 *
+	 * @param bool		$debug 				If the debug constants should be enabled by default or not
+	 * @param bool		$debug_container 	If the container should be compiled on
+	 *										every page load or not
+	 * @param string	$environment		The environment to use
+	 *
+	 * @return string	content to be written to the config file
+	 */
+	protected function get_config_data($debug = false, $debug_container = false, $environment = null)
+	{
+		$config_content = "<?php\n";
+		$config_content .= "// phpBB 3.2.x auto-generated configuration file\n// Do not change anything in this file!\n";
+
+		$dbms = $this->install_config->get('dbms');
+		$db_driver = $this->db_helper->get_available_dbms($dbms);
+		$db_driver = $db_driver[$dbms]['DRIVER'];
+
+		$config_data_array = array(
+			'dbms'			=> $db_driver,
+			'dbhost'		=> $this->install_config->get('dbhost'),
+			'dbport'		=> $this->install_config->get('dbport'),
+			'dbname'		=> $this->install_config->get('dbname'),
+			'dbuser'		=> $this->install_config->get('dbuser'),
+			'dbpasswd'		=> $this->install_config->get('dbpasswd'),
+			'table_prefix'	=> $this->install_config->get('table_prefix'),
+
+			'phpbb_adm_relative_path'	=> 'adm/',
+
+			'acm_type'		=> 'phpbb\cache\driver\file',
+		);
+
+		foreach ($config_data_array as $key => $value)
+		{
+			$config_content .= "\${$key} = '" . str_replace("'", "\\'", str_replace('\\', '\\\\', $value)) . "';\n";
+		}
+
+		$config_content .= "\n@define('PHPBB_INSTALLED', true);\n";
+		$config_content .= "// @define('PHPBB_DISPLAY_LOAD_TIME', true);\n";
+
+		if ($environment)
+		{
+			$config_content .= "@define('PHPBB_ENVIRONMENT', 'test');\n";
+		}
+		else if ($debug)
+		{
+			$config_content .= "@define('PHPBB_ENVIRONMENT', 'development');\n";
+		}
+		else
+		{
+			$config_content .= "@define('PHPBB_ENVIRONMENT', 'production');\n";
+		}
+
+		if ($debug_container)
+		{
+			$config_content .= "@define('DEBUG_CONTAINER', true);\n";
+		}
+		else
+		{
+			$config_content .= "// @define('DEBUG_CONTAINER', true);\n";
+		}
+
+		if ($environment === 'test')
+		{
+			$config_content .= "@define('DEBUG_TEST', true);\n";
+
+			// Mandatory for the functional tests, will be removed by PHPBB3-12623
+			$config_content .= "@define('DEBUG', true);\n";
+		}
+
+		return $config_content;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 1;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return 'TASK_CREATE_CONFIG_FILE';
+	}
+}
diff --git a/phpBB/phpbb/install/module/install_finish/module.php b/phpBB/phpbb/install/module/install_finish/module.php
new file mode 100644
index 0000000000..3a7544b84f
--- /dev/null
+++ b/phpBB/phpbb/install/module/install_finish/module.php
@@ -0,0 +1,28 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\install_finish;
+
+/**
+ * Installer module for filesystem installation
+ */
+class module extends \phpbb\install\module_base
+{
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_navigation_stage_path()
+	{
+		return array('install', 0, 'install');
+	}
+}
diff --git a/phpBB/phpbb/install/module/install_finish/task/install_extensions.php b/phpBB/phpbb/install/module/install_finish/task/install_extensions.php
new file mode 100644
index 0000000000..47ea156c66
--- /dev/null
+++ b/phpBB/phpbb/install/module/install_finish/task/install_extensions.php
@@ -0,0 +1,207 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\install_finish\task;
+
+use phpbb\install\exception\resource_limit_reached_exception;
+
+/**
+ * Installs extensions that exist in ext folder upon install
+ */
+class install_extensions extends \phpbb\install\task_base
+{
+	/**
+	 * @var \phpbb\install\helper\config
+	 */
+	protected $install_config;
+
+	/**
+	 * @var \phpbb\install\helper\iohandler\iohandler_interface
+	 */
+	protected $iohandler;
+
+	/**
+	 * @var \phpbb\config\db
+	 */
+	protected $config;
+
+	/**
+	 * @var \phpbb\log\log_interface
+	 */
+	protected $log;
+
+	/**
+	 * @var \phpbb\user
+	 */
+	protected $user;
+
+	/** @var \phpbb\extension\manager */
+	protected $extension_manager;
+
+	/** @var \Symfony\Component\Finder\Finder */
+	protected $finder;
+
+	/** @var string Extension table */
+	protected $extension_table;
+
+	/** @var \phpbb\db\driver\driver_interface */
+	protected $db;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\install\helper\container_factory				$container
+	 * @param \phpbb\install\helper\config							$install_config
+	 * @param \phpbb\install\helper\iohandler\iohandler_interface	$iohandler
+	 * @param string												$phpbb_root_path phpBB root path
+	 */
+	public function __construct(\phpbb\install\helper\container_factory $container, \phpbb\install\helper\config $install_config, \phpbb\install\helper\iohandler\iohandler_interface $iohandler, $phpbb_root_path)
+	{
+		$this->install_config	= $install_config;
+		$this->iohandler		= $iohandler;
+		$this->extension_table = $container->get_parameter('tables.ext');
+
+		$this->log				= $container->get('log');
+		$this->user				= $container->get('user');
+		$this->extension_manager = $container->get('ext.manager');
+		$this->config			= $container->get('config');
+		$this->db				= $container->get('dbal.conn');
+		$this->finder = new \Symfony\Component\Finder\Finder();
+		$this->finder->in($phpbb_root_path . 'ext/')
+			->ignoreUnreadableDirs()
+			->depth('< 3')
+			->files()
+			->name('composer.json');
+
+		// Make sure asset version exists in config. Otherwise we might try to
+		// insert the assets_version setting into the database and cause a
+		// duplicate entry error.
+		if (!isset($this->config['assets_version']))
+		{
+			$this->config['assets_version'] = 0;
+		}
+
+		parent::__construct(true);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		$this->user->session_begin();
+		$this->user->setup(array('common', 'acp/common', 'cli'));
+
+		$install_extensions = $this->iohandler->get_input('install-extensions', array());
+
+		$all_available_extensions = $this->extension_manager->all_available();
+		$i = $this->install_config->get('install_extensions_index', 0);
+		$available_extensions = array_slice($all_available_extensions, $i);
+
+		// Install extensions
+		foreach ($available_extensions as $ext_name => $ext_path)
+		{
+			if (!empty($install_extensions) && $install_extensions !== ['all'] && !in_array($ext_name, $install_extensions))
+			{
+				continue;
+			}
+
+			try
+			{
+				$extension = $this->extension_manager->get_extension($ext_name);
+
+				if (!$extension->is_enableable())
+				{
+					$this->iohandler->add_log_message(array('CLI_EXTENSION_NOT_ENABLEABLE', $ext_name));
+					continue;
+				}
+
+				$this->extension_manager->enable($ext_name);
+				$extensions = $this->get_extensions();
+
+				if (isset($extensions[$ext_name]) && $extensions[$ext_name]['ext_active'])
+				{
+					// Create log
+					$this->log->add('admin', ANONYMOUS, '', 'LOG_EXT_ENABLE', time(), array($ext_name));
+					$this->iohandler->add_success_message(array('CLI_EXTENSION_ENABLE_SUCCESS', $ext_name));
+				}
+				else
+				{
+					$this->iohandler->add_log_message(array('CLI_EXTENSION_ENABLE_FAILURE', $ext_name));
+				}
+			}
+			catch (\Exception $e)
+			{
+				// Add fail log and continue
+				$this->iohandler->add_log_message(array('CLI_EXTENSION_ENABLE_FAILURE', $ext_name));
+			}
+
+			$i++;
+
+			// Stop execution if resource limit is reached
+			if ($this->install_config->get_time_remaining() <= 0 || $this->install_config->get_memory_remaining() <= 0)
+			{
+				break;
+			}
+		}
+
+		$this->install_config->set('install_extensions_index', $i);
+
+		if ($i < count($all_available_extensions))
+		{
+			throw new resource_limit_reached_exception();
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 1;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return 'TASK_INSTALL_EXTENSIONS';
+	}
+
+	/**
+	 * Get extensions from database
+	 *
+	 * @return array List of extensions
+	 */
+	private function get_extensions()
+	{
+		$sql = 'SELECT *
+			FROM ' . $this->extension_table;
+
+		$result = $this->db->sql_query($sql);
+		$extensions_row = $this->db->sql_fetchrowset($result);
+		$this->db->sql_freeresult($result);
+
+		$extensions = array();
+
+		foreach ($extensions_row as $extension)
+		{
+			$extensions[$extension['ext_name']] = $extension;
+		}
+
+		ksort($extensions);
+
+		return $extensions;
+	}
+}
diff --git a/phpBB/phpbb/install/module/install_finish/task/notify_user.php b/phpBB/phpbb/install/module/install_finish/task/notify_user.php
new file mode 100644
index 0000000000..292be57f5f
--- /dev/null
+++ b/phpBB/phpbb/install/module/install_finish/task/notify_user.php
@@ -0,0 +1,174 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\install_finish\task;
+
+use phpbb\config\db;
+
+/**
+ * Logs installation and sends an email to the admin
+ */
+class notify_user extends \phpbb\install\task_base
+{
+	/**
+	 * @var \phpbb\install\helper\config
+	 */
+	protected $install_config;
+
+	/**
+	 * @var \phpbb\install\helper\iohandler\iohandler_interface
+	 */
+	protected $iohandler;
+
+	/**
+	 * @var \phpbb\auth\auth
+	 */
+	protected $auth;
+
+	/**
+	 * @var \phpbb\config\db
+	 */
+	protected $config;
+
+	/**
+	 * @var \phpbb\language\language
+	 */
+	protected $language;
+
+	/**
+	 * @var \phpbb\log\log_interface
+	 */
+	protected $log;
+
+	/**
+	 * @var \phpbb\user
+	 */
+	protected $user;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * @var string
+	 */
+	protected $php_ext;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\install\helper\container_factory				$container
+	 * @param \phpbb\install\helper\config							$install_config
+	 * @param \phpbb\install\helper\iohandler\iohandler_interface	$iohandler
+	 * @param string												$phpbb_root_path
+	 * @param string												$php_ext
+	 */
+	public function __construct(\phpbb\install\helper\container_factory $container, \phpbb\install\helper\config $install_config, \phpbb\install\helper\iohandler\iohandler_interface $iohandler, $phpbb_root_path, $php_ext)
+	{
+		$this->install_config	= $install_config;
+		$this->iohandler		= $iohandler;
+
+		$this->auth				= $container->get('auth');
+		$this->language			= $container->get('language');
+		$this->log				= $container->get('log');
+		$this->user				= $container->get('user');
+		$this->phpbb_root_path	= $phpbb_root_path;
+		$this->php_ext			= $php_ext;
+
+		// We need to reload config for cases when it doesn't have all values
+		/** @var \phpbb\cache\driver\driver_interface $cache */
+		$cache = $container->get('cache.driver');
+		$cache->destroy('config');
+
+		$this->config = new db(
+			$container->get('dbal.conn'),
+			$cache,
+			$container->get_parameter('tables.config')
+		);
+
+		parent::__construct(true);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		$this->user->session_begin();
+		$this->user->setup('common');
+
+		if ($this->config['email_enable'])
+		{
+			include ($this->phpbb_root_path . 'includes/functions_messenger.' . $this->php_ext);
+
+			// functions_messenger.php uses config to determine language paths
+			// Remove when able
+			global $config;
+			$config = $this->config;
+
+			$messenger = new \messenger(false);
+			$messenger->template('installed', $this->install_config->get('user_language', 'en'));
+			$messenger->to($this->config['board_email'], $this->install_config->get('admin_name'));
+			$messenger->anti_abuse_headers($this->config, $this->user);
+			$messenger->assign_vars(array(
+					'USERNAME'		=> htmlspecialchars_decode($this->install_config->get('admin_name')),
+					'PASSWORD'		=> htmlspecialchars_decode($this->install_config->get('admin_passwd')))
+			);
+			$messenger->send(NOTIFY_EMAIL);
+		}
+
+		// Login admin
+		// Ugly but works
+		$this->auth->login(
+			$this->install_config->get('admin_name'),
+			$this->install_config->get('admin_passwd'),
+			false,
+			true,
+			true
+		);
+
+		$this->iohandler->set_cookie($this->config['cookie_name'] . '_sid', $this->user->session_id);
+		$this->iohandler->set_cookie($this->config['cookie_name'] . '_u', $this->user->cookie_data['u']);
+		$this->iohandler->set_cookie($this->config['cookie_name'] . '_k', $this->user->cookie_data['k']);
+
+		// Create log
+		$this->log->add(
+			'admin',
+			$this->user->data['user_id'],
+			$this->user->ip,
+			'LOG_INSTALL_INSTALLED',
+			false,
+			array($this->config['version'])
+		);
+
+		// Remove install_lock
+		@unlink($this->phpbb_root_path . 'cache/install_lock');
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 1;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return 'TASK_NOTIFY_USER';
+	}
+}
diff --git a/phpBB/phpbb/install/module/install_finish/task/populate_migrations.php b/phpBB/phpbb/install/module/install_finish/task/populate_migrations.php
new file mode 100644
index 0000000000..cebf0f425f
--- /dev/null
+++ b/phpBB/phpbb/install/module/install_finish/task/populate_migrations.php
@@ -0,0 +1,93 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\install_finish\task;
+
+use phpbb\install\exception\resource_limit_reached_exception;
+use phpbb\install\helper\config;
+use phpbb\install\helper\container_factory;
+
+/**
+ * Populates migrations
+ */
+class populate_migrations extends \phpbb\install\task_base
+{
+	/**
+	 * @var config
+	 */
+	protected $config;
+
+	/**
+	 * @var \phpbb\extension\manager
+	 */
+	protected $extension_manager;
+
+	/**
+	 * @var \phpbb\db\migrator
+	 */
+	protected $migrator;
+
+	/**
+	 * Constructor
+	 *
+	 * @param config			$config		Installer's config
+	 * @param container_factory	$container	phpBB's DI contianer
+	 */
+	public function __construct(config $config, container_factory $container)
+	{
+		$this->config				= $config;
+		$this->extension_manager	= $container->get('ext.manager');
+		$this->migrator				= $container->get('migrator');
+
+		parent::__construct(true);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		if (!$this->config->get('populate_migration_refresh_before', false))
+		{
+			if ($this->config->get_time_remaining() < 1)
+			{
+				$this->config->set('populate_migration_refresh_before', true);
+				throw new resource_limit_reached_exception();
+			}
+		}
+
+		$finder = $this->extension_manager->get_finder();
+
+		$migrations = $finder
+			->core_path('phpbb/db/migration/data/')
+			->set_extensions(array())
+			->get_classes();
+		$this->migrator->populate_migrations($migrations);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 1;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return 'TASK_POPULATE_MIGRATIONS';
+	}
+}
diff --git a/phpBB/phpbb/install/module/obtain_data/install_module.php b/phpBB/phpbb/install/module/obtain_data/install_module.php
new file mode 100644
index 0000000000..deb4be90d8
--- /dev/null
+++ b/phpBB/phpbb/install/module/obtain_data/install_module.php
@@ -0,0 +1,33 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\obtain_data;
+
+class install_module extends \phpbb\install\module_base
+{
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_navigation_stage_path()
+	{
+		return array('install', 0, 'obtain_data');
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_step_count()
+	{
+		return 0;
+	}
+}
diff --git a/phpBB/phpbb/install/module/obtain_data/task/obtain_admin_data.php b/phpBB/phpbb/install/module/obtain_data/task/obtain_admin_data.php
new file mode 100644
index 0000000000..d1f1af6b83
--- /dev/null
+++ b/phpBB/phpbb/install/module/obtain_data/task/obtain_admin_data.php
@@ -0,0 +1,218 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\obtain_data\task;
+
+use phpbb\install\exception\user_interaction_required_exception;
+
+/**
+ * This class requests and validates admin account data from the user
+ */
+class obtain_admin_data extends \phpbb\install\task_base implements \phpbb\install\task_interface
+{
+	/**
+	 * @var \phpbb\install\helper\config
+	 */
+	protected $install_config;
+
+	/**
+	 * @var \phpbb\install\helper\iohandler\iohandler_interface
+	 */
+	protected $io_handler;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\install\helper\config							$install_config	Installer's config helper
+	 * @param \phpbb\install\helper\iohandler\iohandler_interface	$iohandler		Installer's input-output handler
+	 */
+	public function __construct(\phpbb\install\helper\config $install_config,
+								\phpbb\install\helper\iohandler\iohandler_interface $iohandler)
+	{
+		$this->install_config	= $install_config;
+		$this->io_handler		= $iohandler;
+
+		parent::__construct(true);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		// Check if data is sent
+		if ($this->io_handler->get_input('submit_admin', false))
+		{
+			$this->process_form();
+		}
+		else
+		{
+			$this->request_form_data();
+		}
+	}
+
+	/**
+	 * Process form data
+	 */
+	protected function process_form()
+	{
+		// Admin data
+		$admin_name		= $this->io_handler->get_input('admin_name', '', true);
+		$admin_pass1	= $this->io_handler->get_input('admin_pass1', '', true);
+		$admin_pass2	= $this->io_handler->get_input('admin_pass2', '', true);
+		$board_email	= $this->io_handler->get_input('board_email', '', true);
+
+		$admin_data_valid = $this->check_admin_data($admin_name, $admin_pass1, $admin_pass2, $board_email);
+
+		if ($admin_data_valid)
+		{
+			$this->install_config->set('admin_name', $admin_name);
+			$this->install_config->set('admin_passwd', $admin_pass1);
+			$this->install_config->set('board_email', $board_email);
+		}
+		else
+		{
+			$this->request_form_data(true);
+		}
+	}
+
+	/**
+	 * Request data from the user
+	 *
+	 * @param bool $use_request_data Whether to use submited data
+	 *
+	 * @throws \phpbb\install\exception\user_interaction_required_exception When the user is required to provide data
+	 */
+	protected function request_form_data($use_request_data = false)
+	{
+		if ($use_request_data)
+		{
+			$admin_username	= $this->io_handler->get_input('admin_name', '', true);
+			$admin_email	= $this->io_handler->get_input('board_email', '', true);
+		}
+		else
+		{
+			$admin_username	= '';
+			$admin_email	= '';
+		}
+
+		$admin_form = array(
+			'admin_name'	=> array(
+				'label'			=> 'ADMIN_USERNAME',
+				'description'	=> 'ADMIN_USERNAME_EXPLAIN',
+				'type'			=> 'text',
+				'default'		=> $admin_username,
+			),
+			'board_email'	=> array(
+				'label'		=> 'CONTACT_EMAIL',
+				'type'		=> 'email',
+				'default'	=> $admin_email,
+			),
+			'admin_pass1'	=> array(
+				'label'			=> 'ADMIN_PASSWORD',
+				'description'	=> 'ADMIN_PASSWORD_EXPLAIN',
+				'type'			=> 'password',
+			),
+			'admin_pass2'	=> array(
+				'label'	=> 'ADMIN_PASSWORD_CONFIRM',
+				'type'	=> 'password',
+			),
+			'submit_admin'	=> array(
+				'label'	=> 'SUBMIT',
+				'type'	=> 'submit',
+			),
+		);
+
+		$this->io_handler->add_user_form_group('ADMIN_CONFIG', $admin_form);
+
+		// Require user interaction
+		throw new user_interaction_required_exception();
+	}
+
+	/**
+	 * Check admin data
+	 *
+	 * @param string	$username	Admin username
+	 * @param string	$pass1		Admin password
+	 * @param string	$pass2		Admin password confirmation
+	 * @param string	$email		Admin e-mail address
+	 *
+	 * @return bool	True if data is valid, false otherwise
+	 */
+	protected function check_admin_data($username, $pass1, $pass2, $email)
+	{
+		$data_valid = true;
+
+		// Check if none of admin data is empty
+		if (in_array('', array($username, $pass1, $pass2, $email), true))
+		{
+			$this->io_handler->add_error_message('INST_ERR_MISSING_DATA');
+			$data_valid = false;
+		}
+
+		if (utf8_strlen($username) < 3)
+		{
+			$this->io_handler->add_error_message('INST_ERR_USER_TOO_SHORT');
+			$data_valid = false;
+		}
+
+		if (utf8_strlen($username) > 20)
+		{
+			$this->io_handler->add_error_message('INST_ERR_USER_TOO_LONG');
+			$data_valid = false;
+		}
+
+		if ($pass1 !== $pass2 && $pass1 !== '')
+		{
+			$this->io_handler->add_error_message('INST_ERR_PASSWORD_MISMATCH');
+			$data_valid = false;
+		}
+
+		// Test against the default password rules
+		if (utf8_strlen($pass1) < 6)
+		{
+			$this->io_handler->add_error_message('INST_ERR_PASSWORD_TOO_SHORT');
+			$data_valid = false;
+		}
+
+		if (utf8_strlen($pass1) > 30)
+		{
+			$this->io_handler->add_error_message('INST_ERR_PASSWORD_TOO_LONG');
+			$data_valid = false;
+		}
+
+		if (!preg_match('/^' . get_preg_expression('email') . '$/i', $email))
+		{
+			$this->io_handler->add_error_message('INST_ERR_EMAIL_INVALID');
+			$data_valid = false;
+		}
+
+		return $data_valid;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 0;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return '';
+	}
+}
diff --git a/phpBB/phpbb/install/module/obtain_data/task/obtain_board_data.php b/phpBB/phpbb/install/module/obtain_data/task/obtain_board_data.php
new file mode 100644
index 0000000000..ff2a0a2f86
--- /dev/null
+++ b/phpBB/phpbb/install/module/obtain_data/task/obtain_board_data.php
@@ -0,0 +1,185 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\obtain_data\task;
+
+use phpbb\install\exception\user_interaction_required_exception;
+
+/**
+ * This class obtains default data from the user related to board (Board name, Board descritpion, etc...)
+ */
+class obtain_board_data extends \phpbb\install\task_base implements \phpbb\install\task_interface
+{
+	/**
+	 * @var \phpbb\install\helper\config
+	 */
+	protected $install_config;
+
+	/**
+	 * @var \phpbb\install\helper\iohandler\iohandler_interface
+	 */
+	protected $io_handler;
+
+	/**
+	 * @var \phpbb\language\language_file_helper
+	 */
+	protected $language_helper;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\install\helper\config							$config			Installer's config
+	 * @param \phpbb\install\helper\iohandler\iohandler_interface	$iohandler		Installer's input-output handler
+	 * @param \phpbb\language\language_file_helper					$lang_helper	Language file helper
+	 */
+	public function __construct(\phpbb\install\helper\config $config,
+								\phpbb\install\helper\iohandler\iohandler_interface $iohandler,
+								\phpbb\language\language_file_helper $lang_helper)
+	{
+		$this->install_config	= $config;
+		$this->io_handler		= $iohandler;
+		$this->language_helper	= $lang_helper;
+
+		parent::__construct(true);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		// Check if data is sent
+		if ($this->io_handler->get_input('submit_board', false))
+		{
+			$this->process_form();
+		}
+		else
+		{
+			$this->request_form_data();
+		}
+	}
+
+	/**
+	 * Process form data
+	 */
+	protected function process_form()
+	{
+		// Board data
+		$default_lang	= $this->io_handler->get_input('default_lang', '');
+		$board_name		= $this->io_handler->get_input('board_name', '', true);
+		$board_desc		= $this->io_handler->get_input('board_description', '', true);
+
+		// Check default lang
+		$langs = $this->language_helper->get_available_languages();
+		$lang_valid = false;
+
+		foreach ($langs as $lang)
+		{
+			if ($lang['iso'] === $default_lang)
+			{
+				$lang_valid = true;
+				break;
+			}
+		}
+
+		$this->install_config->set('board_name', $board_name);
+		$this->install_config->set('board_description', $board_desc);
+
+		if ($lang_valid)
+		{
+			$this->install_config->set('default_lang', $default_lang);
+		}
+		else
+		{
+			$this->request_form_data(true);
+		}
+	}
+
+	/**
+	 * Request data from the user
+	 *
+	 * @param bool $use_request_data Whether to use submited data
+	 *
+	 * @throws \phpbb\install\exception\user_interaction_required_exception When the user is required to provide data
+	 */
+	protected function request_form_data($use_request_data = false)
+	{
+		if ($use_request_data)
+		{
+			$board_name		= $this->io_handler->get_input('board_name', '', true);
+			$board_desc		= $this->io_handler->get_input('board_description', '', true);
+		}
+		else
+		{
+			$board_name		= '{L_CONFIG_SITENAME}';
+			$board_desc		= '{L_CONFIG_SITE_DESC}';
+		}
+
+		// Use language because we only check this to be valid
+		$default_lang	= $this->install_config->get('user_language', 'en');
+
+		$langs = $this->language_helper->get_available_languages();
+		$lang_options = array();
+
+		foreach ($langs as $lang)
+		{
+			$lang_options[] = array(
+				'value'		=> $lang['iso'],
+				'label'		=> $lang['local_name'],
+				'selected'	=> ($default_lang === $lang['iso']),
+			);
+		}
+
+		$board_form = array(
+			'default_lang' => array(
+				'label'		=> 'DEFAULT_LANGUAGE',
+				'type'		=> 'select',
+				'options'	=> $lang_options,
+			),
+			'board_name' => array(
+				'label'		=> 'BOARD_NAME',
+				'type'		=> 'text',
+				'default'	=> $board_name,
+			),
+			'board_description' => array(
+				'label'		=> 'BOARD_DESCRIPTION',
+				'type'		=> 'text',
+				'default'	=> $board_desc,
+			),
+			'submit_board'	=> array(
+				'label'	=> 'SUBMIT',
+				'type'	=> 'submit',
+			),
+		);
+
+		$this->io_handler->add_user_form_group('BOARD_CONFIG', $board_form);
+
+		throw new user_interaction_required_exception();
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 0;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return '';
+	}
+}
diff --git a/phpBB/phpbb/install/module/obtain_data/task/obtain_database_data.php b/phpBB/phpbb/install/module/obtain_data/task/obtain_database_data.php
new file mode 100644
index 0000000000..6ec1e612b9
--- /dev/null
+++ b/phpBB/phpbb/install/module/obtain_data/task/obtain_database_data.php
@@ -0,0 +1,270 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\obtain_data\task;
+
+use phpbb\install\exception\user_interaction_required_exception;
+
+/**
+ * This class requests and validates database information from the user
+ */
+class obtain_database_data extends \phpbb\install\task_base implements \phpbb\install\task_interface
+{
+	/**
+	 * @var \phpbb\install\helper\database
+	 */
+	protected $database_helper;
+
+	/**
+	 * @var \phpbb\install\helper\config
+	 */
+	protected $install_config;
+
+	/**
+	 * @var \phpbb\install\helper\iohandler\iohandler_interface
+	 */
+	protected $io_handler;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\install\helper\database						$database_helper	Installer's database helper
+	 * @param \phpbb\install\helper\config							$install_config		Installer's config helper
+	 * @param \phpbb\install\helper\iohandler\iohandler_interface	$iohandler			Installer's input-output handler
+	 */
+	public function __construct(\phpbb\install\helper\database $database_helper,
+								\phpbb\install\helper\config $install_config,
+								\phpbb\install\helper\iohandler\iohandler_interface $iohandler)
+	{
+		$this->database_helper	= $database_helper;
+		$this->install_config	= $install_config;
+		$this->io_handler		= $iohandler;
+
+		parent::__construct(true);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		// Check if data is sent
+		if ($this->io_handler->get_input('submit_database', false))
+		{
+			$this->process_form();
+		}
+		else
+		{
+			$this->request_form_data();
+		}
+	}
+
+	/**
+	 * Process form data
+	 */
+	protected function process_form()
+	{
+		// Collect database data
+		$dbms			= $this->io_handler->get_input('dbms', '');
+		$dbhost			= $this->io_handler->get_input('dbhost', '', true);
+		$dbport			= $this->io_handler->get_input('dbport', '');
+		$dbuser			= $this->io_handler->get_input('dbuser', '', true);
+		$dbpasswd		= $this->io_handler->get_raw_input('dbpasswd', '', true);
+		$dbname			= $this->io_handler->get_input('dbname', '', true);
+		$table_prefix	= $this->io_handler->get_input('table_prefix', '', true);
+
+		// Check database data
+		$user_data_vaild = $this->check_database_data($dbms, $dbhost, $dbport, $dbuser, $dbpasswd, $dbname, $table_prefix);
+
+		// Save database data if it is correct
+		if ($user_data_vaild)
+		{
+			$this->install_config->set('dbms', $dbms);
+			$this->install_config->set('dbhost', $dbhost);
+			$this->install_config->set('dbport', $dbport);
+			$this->install_config->set('dbuser', $dbuser);
+			$this->install_config->set('dbpasswd', $dbpasswd);
+			$this->install_config->set('dbname', $dbname);
+			$this->install_config->set('table_prefix', $table_prefix);
+		}
+		else
+		{
+			$this->request_form_data(true);
+		}
+	}
+
+	/**
+	 * Request data from the user
+	 *
+	 * @param bool $use_request_data Whether to use submited data
+	 *
+	 * @throws \phpbb\install\exception\user_interaction_required_exception When the user is required to provide data
+	 */
+	protected function request_form_data($use_request_data = false)
+	{
+		if ($use_request_data)
+		{
+			$dbms			= $this->io_handler->get_input('dbms', '');
+			$dbhost			= $this->io_handler->get_input('dbhost', '', true);
+			$dbport			= $this->io_handler->get_input('dbport', '');
+			$dbuser			= $this->io_handler->get_input('dbuser', '');
+			$dbname			= $this->io_handler->get_input('dbname', '');
+			$table_prefix	= $this->io_handler->get_input('table_prefix', 'phpbb_');
+		}
+		else
+		{
+			$dbms			= '';
+			$dbhost			= '';
+			$dbport			= '';
+			$dbuser			= '';
+			$dbname			= '';
+			$table_prefix	= 'phpbb_';
+		}
+
+		$dbms_select = array();
+		foreach ($this->database_helper->get_available_dbms() as $dbms_key => $dbms_array)
+		{
+			$dbms_select[] = array(
+				'value'		=> $dbms_key,
+				'label'		=> 'DB_OPTION_' . strtoupper($dbms_key),
+				'selected'	=> ($dbms_key === $dbms),
+			);
+		}
+
+		$database_form = array(
+			'dbms' => array(
+				'label'		=> 'DBMS',
+				'type'		=> 'select',
+				'options'	=> $dbms_select,
+			),
+			'dbhost' => array(
+				'label'			=> 'DB_HOST',
+				'description'	=> 'DB_HOST_EXPLAIN',
+				'type'			=> 'text',
+				'default'		=> $dbhost,
+			),
+			'dbport' => array(
+				'label'			=> 'DB_PORT',
+				'description'	=> 'DB_PORT_EXPLAIN',
+				'type'			=> 'text',
+				'default'		=> $dbport,
+			),
+			'dbuser' => array(
+				'label'		=> 'DB_USERNAME',
+				'type'		=> 'text',
+				'default'	=> $dbuser,
+			),
+			'dbpasswd' => array(
+				'label'		=> 'DB_PASSWORD',
+				'type'	=> 'password',
+			),
+			'dbname' => array(
+				'label'		=> 'DB_NAME',
+				'type'		=> 'text',
+				'default'	=> $dbname,
+			),
+			'table_prefix' => array(
+				'label'			=> 'TABLE_PREFIX',
+				'description'	=> 'TABLE_PREFIX_EXPLAIN',
+				'type'			=> 'text',
+				'default'		=> $table_prefix,
+			),
+			'submit_database' => array(
+				'label'	=> 'SUBMIT',
+				'type'	=> 'submit',
+			),
+		);
+
+		$this->io_handler->add_user_form_group('DB_CONFIG', $database_form);
+
+		// Require user interaction
+		throw new user_interaction_required_exception();
+	}
+
+	/**
+	 * Check database data
+	 *
+	 * @param string	$dbms			Selected database type
+	 * @param string	$dbhost			Database host address
+	 * @param int		$dbport			Database port number
+	 * @param string	$dbuser			Database username
+	 * @param string	$dbpass			Database password
+	 * @param string	$dbname			Database name
+	 * @param string	$table_prefix	Database table prefix
+	 *
+	 * @return bool	True if database data is correct, false otherwise
+	 */
+	protected function check_database_data($dbms, $dbhost, $dbport, $dbuser, $dbpass, $dbname, $table_prefix)
+	{
+		$available_dbms = $this->database_helper->get_available_dbms();
+		$data_valid = true;
+
+		// Check if PHP has the database extensions for the specified DBMS
+		if (!isset($available_dbms[$dbms]))
+		{
+			$this->io_handler->add_error_message('INST_ERR_NO_DB');
+			$data_valid = false;
+		}
+
+		// Validate table prefix
+		$prefix_valid = $this->database_helper->validate_table_prefix($dbms, $table_prefix);
+		if (is_array($prefix_valid))
+		{
+			foreach ($prefix_valid as $error)
+			{
+				$this->io_handler->add_error_message(
+					$error['title'],
+					(isset($error['description'])) ? $error['description'] : false
+				);
+			}
+
+			$data_valid = false;
+		}
+
+		// Try to connect to database if all provided data is valid
+		if ($data_valid)
+		{
+			$connect_test = $this->database_helper->check_database_connection($dbms, $dbhost, $dbport, $dbuser, $dbpass, $dbname, $table_prefix);
+			if (is_array($connect_test))
+			{
+				foreach ($connect_test as $error)
+				{
+					$this->io_handler->add_error_message(
+						$error['title'],
+						(isset($error['description'])) ? $error['description'] : false
+					);
+				}
+
+				$data_valid = false;
+			}
+		}
+
+		return $data_valid;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 0;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return '';
+	}
+}
diff --git a/phpBB/phpbb/install/module/obtain_data/task/obtain_email_data.php b/phpBB/phpbb/install/module/obtain_data/task/obtain_email_data.php
new file mode 100644
index 0000000000..7cd0d7bf23
--- /dev/null
+++ b/phpBB/phpbb/install/module/obtain_data/task/obtain_email_data.php
@@ -0,0 +1,173 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\obtain_data\task;
+
+use phpbb\install\exception\user_interaction_required_exception;
+
+class obtain_email_data extends \phpbb\install\task_base implements \phpbb\install\task_interface
+{
+	/**
+	 * @var \phpbb\install\helper\config
+	 */
+	protected $install_config;
+
+	/**
+	 * @var \phpbb\install\helper\iohandler\iohandler_interface
+	 */
+	protected $io_handler;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\install\helper\config							$config		Installer's config
+	 * @param \phpbb\install\helper\iohandler\iohandler_interface	$iohandler	Installer's input-output handler
+	 */
+	public function __construct(\phpbb\install\helper\config $config,
+								\phpbb\install\helper\iohandler\iohandler_interface $iohandler)
+	{
+		$this->install_config	= $config;
+		$this->io_handler		= $iohandler;
+
+		parent::__construct(true);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		// E-mail data
+		$email_enable	= $this->io_handler->get_input('email_enable', true);
+		$smtp_delivery	= $this->io_handler->get_input('smtp_delivery', '');
+		$smtp_host		= $this->io_handler->get_input('smtp_host', '', true);
+		$smtp_port		= $this->io_handler->get_input('smtp_port', '');
+		$smtp_auth		= $this->io_handler->get_input('smtp_auth', '');
+		$smtp_user		= $this->io_handler->get_input('smtp_user', '', true);
+		$smtp_passwd	= $this->io_handler->get_input('smtp_pass', '', true);
+
+		$auth_methods = array('PLAIN', 'LOGIN', 'CRAM-MD5', 'DIGEST-MD5', 'POP-BEFORE-SMTP');
+
+		// Check if data is sent
+		if ($this->io_handler->get_input('submit_email', false))
+		{
+			$this->install_config->set('email_enable', $email_enable);
+			$this->install_config->set('smtp_delivery', $smtp_delivery);
+			$this->install_config->set('smtp_host', $smtp_host);
+			$this->install_config->set('smtp_port', $smtp_port);
+			$this->install_config->set('smtp_auth', $smtp_auth);
+			$this->install_config->set('smtp_user', $smtp_user);
+			$this->install_config->set('smtp_pass', $smtp_passwd);
+		}
+		else
+		{
+			$auth_options = array();
+			foreach ($auth_methods as $method)
+			{
+				$auth_options[] = array(
+					'value'		=> $method,
+					'label'		=> 'SMTP_' . str_replace('-', '_', $method),
+					'selected'	=> false,
+				);
+			}
+
+			$email_form = array(
+				'email_enable' => array(
+					'label'			=> 'ENABLE_EMAIL',
+					'description'	=> 'ENABLE_EMAIL_EXPLAIN',
+					'type'			=> 'radio',
+					'options'		=> array(
+						array(
+							'value'		=> 1,
+							'label'		=> 'ENABLE',
+							'selected'	=> true,
+						),
+						array(
+							'value'		=> 0,
+							'label'		=> 'DISABLE',
+							'selected'	=> false,
+						),
+					),
+				),
+				'smtp_delivery' => array(
+					'label'			=> 'USE_SMTP',
+					'description'	=> 'USE_SMTP_EXPLAIN',
+					'type'			=> 'radio',
+					'options'		=> array(
+						array(
+							'value'		=> 0,
+							'label'		=> 'NO',
+							'selected'	=> true,
+						),
+						array(
+							'value'		=> 1,
+							'label'		=> 'YES',
+							'selected'	=> false,
+						),
+					),
+				),
+				'smtp_host' => array(
+					'label'			=> 'SMTP_SERVER',
+					'type'			=> 'text',
+					'default'		=> $smtp_host,
+				),
+				'smtp_port' => array(
+					'label'			=> 'SMTP_PORT',
+					'type'			=> 'text',
+					'default'		=> $smtp_port,
+				),
+				'smtp_auth' => array(
+					'label'			=> 'SMTP_AUTH_METHOD',
+					'description'	=> 'SMTP_AUTH_METHOD_EXPLAIN',
+					'type'			=> 'select',
+					'options'		=> $auth_options,
+				),
+				'smtp_user' => array(
+					'label'			=> 'SMTP_USERNAME',
+					'description'	=> 'SMTP_USERNAME_EXPLAIN',
+					'type'			=> 'text',
+					'default'		=> $smtp_user,
+				),
+				'smtp_pass' => array(
+					'label'			=> 'SMTP_PASSWORD',
+					'description'	=> 'SMTP_PASSWORD_EXPLAIN',
+					'type'			=> 'password',
+				),
+				'submit_email' => array(
+					'label'	=> 'SUBMIT',
+					'type'	=> 'submit',
+				),
+			);
+
+			$this->io_handler->add_user_form_group('EMAIL_CONFIG', $email_form);
+
+			throw new user_interaction_required_exception();
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 0;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return '';
+	}
+}
diff --git a/phpBB/phpbb/install/module/obtain_data/task/obtain_file_updater_method.php b/phpBB/phpbb/install/module/obtain_data/task/obtain_file_updater_method.php
new file mode 100644
index 0000000000..d5a8855c37
--- /dev/null
+++ b/phpBB/phpbb/install/module/obtain_data/task/obtain_file_updater_method.php
@@ -0,0 +1,167 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\obtain_data\task;
+
+use phpbb\install\exception\user_interaction_required_exception;
+use phpbb\install\helper\config;
+use phpbb\install\helper\iohandler\iohandler_interface;
+use phpbb\install\task_base;
+
+class obtain_file_updater_method extends task_base
+{
+	/**
+	 * @var array	Supported compression methods
+	 *
+	 * Note: .tar is assumed to be supported, but not in the list
+	 */
+	protected $available_methods;
+
+	/**
+	 * @var \phpbb\install\helper\config
+	 */
+	protected $installer_config;
+
+	/**
+	 * @var \phpbb\install\helper\iohandler\iohandler_interface
+	 */
+	protected $iohandler;
+
+	/**
+	 * Constructor
+	 *
+	 * @param config				$installer_config
+	 * @param iohandler_interface	$iohandler
+	 */
+	public function __construct(config $installer_config, iohandler_interface $iohandler)
+	{
+		$this->installer_config	= $installer_config;
+		$this->iohandler		= $iohandler;
+
+		$this->available_methods = array('.tar.gz' => 'zlib', '.tar.bz2' => 'bz2', '.zip' => 'zlib');
+
+		parent::__construct(false);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function check_requirements()
+	{
+		return $this->installer_config->get('do_update_files', false);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		// Check if data is sent
+		if ($this->iohandler->get_input('submit_update_file', false))
+		{
+			$supported_methods = array('compression', 'ftp', 'direct_file');
+			$method = $this->iohandler->get_input('method', 'compression');
+			$update_method = (in_array($method, $supported_methods, true)) ? $method : 'compression';
+			$this->installer_config->set('file_update_method', $update_method);
+
+			$compression = $this->iohandler->get_input('compression_method', '.zip');
+			$supported_methods = array_keys($this->available_methods);
+			$supported_methods[] = '.tar';
+			$compression = (in_array($compression, $supported_methods, true)) ? $compression : '.zip';
+			$this->installer_config->set('file_update_compression', $compression);
+		}
+		else
+		{
+			$this->iohandler->add_user_form_group('UPDATE_FILE_METHOD_TITLE', array(
+				'method' => array(
+					'label'		=> 'UPDATE_FILE_METHOD',
+					'type'		=> 'select',
+					'options'	=> array(
+						array(
+							'value'		=> 'compression',
+							'label'		=> 'UPDATE_FILE_METHOD_DOWNLOAD',
+							'selected'	=> true,
+						),
+						array(
+							'value'		=> 'ftp',
+							'label'		=> 'UPDATE_FILE_METHOD_FTP',
+							'selected'	=> false,
+						),
+						array(
+							'value'		=> 'direct_file',
+							'label'		=> 'UPDATE_FILE_METHOD_FILESYSTEM',
+							'selected'	=> false,
+						),
+					),
+				),
+				'compression_method' => array(
+					'label'		=> 'SELECT_DOWNLOAD_FORMAT',
+					'type'		=> 'select',
+					'options'	=> $this->get_available_compression_methods(),
+				),
+				'submit_update_file' => array(
+					'label'	=> 'SUBMIT',
+					'type'	=> 'submit',
+				),
+			));
+
+			throw new user_interaction_required_exception();
+		}
+	}
+
+	/**
+	 * Returns form elements in an array of available compression methods
+	 *
+	 * @return array
+	 */
+	protected function get_available_compression_methods()
+	{
+		$methods[] = array(
+			'value'		=> '.tar',
+			'label'		=> '.tar',
+			'selected'	=> true,
+		);
+
+		foreach ($this->available_methods as $type => $module)
+		{
+			if (!@extension_loaded($module))
+			{
+				continue;
+			}
+
+			$methods[] = array(
+				'value'		=> $type,
+				'label'		=> $type,
+				'selected'	=> false,
+			);
+		}
+
+		return $methods;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 0;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return '';
+	}
+}
diff --git a/phpBB/phpbb/install/module/obtain_data/task/obtain_server_data.php b/phpBB/phpbb/install/module/obtain_data/task/obtain_server_data.php
new file mode 100644
index 0000000000..5096ce284e
--- /dev/null
+++ b/phpBB/phpbb/install/module/obtain_data/task/obtain_server_data.php
@@ -0,0 +1,202 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\obtain_data\task;
+
+use phpbb\install\exception\user_interaction_required_exception;
+
+/**
+ * This class requests and saves some information about the server
+ */
+class obtain_server_data extends \phpbb\install\task_base implements \phpbb\install\task_interface
+{
+	/**
+	 * @var \phpbb\install\helper\config
+	 */
+	protected $install_config;
+
+	/**
+	 * @var \phpbb\install\helper\iohandler\iohandler_interface
+	 */
+	protected $io_handler;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\install\helper\config							$config		Installer's config
+	 * @param \phpbb\install\helper\iohandler\iohandler_interface	$iohandler	Installer's input-output handler
+	 */
+	public function __construct(\phpbb\install\helper\config $config,
+								\phpbb\install\helper\iohandler\iohandler_interface $iohandler)
+	{
+		$this->install_config	= $config;
+		$this->io_handler		= $iohandler;
+
+		parent::__construct(true);
+	}
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		$cookie_secure = $this->io_handler->is_secure();
+		$server_protocol = ($this->io_handler->is_secure()) ? 'https://' : 'http://';
+		$server_port = $this->io_handler->get_server_variable('SERVER_PORT', 0);
+
+		// HTTP_HOST is having the correct browser url in most cases...
+		$server_name = strtolower(htmlspecialchars_decode($this->io_handler->get_header_variable(
+			'Host',
+			$this->io_handler->get_server_variable('SERVER_NAME')
+		)));
+
+		// HTTP HOST can carry a port number...
+		if (strpos($server_name, ':') !== false)
+		{
+			$server_name = substr($server_name, 0, strpos($server_name, ':'));
+		}
+
+		$script_path = htmlspecialchars_decode($this->io_handler->get_server_variable('PHP_SELF'));
+
+		if (!$script_path)
+		{
+			$script_path = htmlspecialchars_decode($this->io_handler->get_server_variable('REQUEST_URI'));
+		}
+
+		$script_path = str_replace(array('\\', '//'), '/', $script_path);
+		$script_path = trim(dirname(dirname(dirname($script_path)))); // Because we are in install/app.php/route_name
+
+		// Server data
+		$cookie_secure		= $this->io_handler->get_input('cookie_secure', $cookie_secure);
+		$server_protocol	= $this->io_handler->get_input('server_protocol', $server_protocol);
+		$force_server_vars	= $this->io_handler->get_input('force_server_vars', 0);
+		$server_name		= $this->io_handler->get_input('server_name', $server_name, true);
+		$server_port		= $this->io_handler->get_input('server_port', $server_port);
+		$script_path		= $this->io_handler->get_input('script_path', $script_path, true);
+
+		// Clean up script path
+		if ($script_path !== '/')
+		{
+			// Adjust destination path (no trailing slash)
+			if (substr($script_path, -1) === '/')
+			{
+				$script_path = substr($script_path, 0, -1);
+			}
+
+			$script_path = str_replace(array('../', './'), '', $script_path);
+
+			if ($script_path[0] !== '/')
+			{
+				$script_path = '/' . $script_path;
+			}
+		}
+
+		// Check if data is sent
+		if ($this->io_handler->get_input('submit_server', false))
+		{
+			$this->install_config->set('cookie_secure', $cookie_secure);
+			$this->install_config->set('server_protocol', $server_protocol);
+			$this->install_config->set('force_server_vars', $force_server_vars);
+			$this->install_config->set('server_name', $server_name);
+			$this->install_config->set('server_port', $server_port);
+			$this->install_config->set('script_path', $script_path);
+		}
+		else
+		{
+			// Render form
+			$server_form = array(
+				'cookie_secure' => array(
+					'label'			=> 'COOKIE_SECURE',
+					'description'	=> 'COOKIE_SECURE_EXPLAIN',
+					'type'			=> 'radio',
+					'options'		=> array(
+						array(
+							'value'		=> 0,
+							'label'		=> 'NO',
+							'selected'	=> (!$cookie_secure),
+						),
+						array(
+							'value'		=> 1,
+							'label'		=> 'YES',
+							'selected'	=> ($cookie_secure),
+						),
+					),
+				),
+				'force_server_vars' => array(
+					'label'			=> 'FORCE_SERVER_VARS',
+					'description'	=> 'FORCE_SERVER_VARS_EXPLAIN',
+					'type'			=> 'radio',
+					'options'		=> array(
+						array(
+							'value'		=> 0,
+							'label'		=> 'NO',
+							'selected'	=> true,
+						),
+						array(
+							'value'		=> 1,
+							'label'		=> 'YES',
+							'selected'	=> false,
+						),
+					),
+				),
+				'server_protocol' => array(
+					'label'			=> 'SERVER_PROTOCOL',
+					'description'	=> 'SERVER_PROTOCOL_EXPLAIN',
+					'type'			=> 'text',
+					'default'		=> $server_protocol,
+				),
+				'server_name' => array(
+					'label'			=> 'SERVER_NAME',
+					'description'	=> 'SERVER_NAME_EXPLAIN',
+					'type'			=> 'text',
+					'default'		=> $server_name,
+				),
+				'server_port' => array(
+					'label'			=> 'SERVER_PORT',
+					'description'	=> 'SERVER_PORT_EXPLAIN',
+					'type'			=> 'text',
+					'default'		=> $server_port,
+				),
+				'script_path' => array(
+					'label'			=> 'SCRIPT_PATH',
+					'description'	=> 'SCRIPT_PATH_EXPLAIN',
+					'type'			=> 'text',
+					'default'		=> $script_path,
+				),
+				'submit_server' => array(
+					'label'	=> 'SUBMIT',
+					'type'	=> 'submit',
+				)
+			);
+
+			$this->io_handler->add_user_form_group('SERVER_CONFIG', $server_form);
+
+			throw new user_interaction_required_exception();
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 0;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return '';
+	}
+}
diff --git a/phpBB/phpbb/install/module/obtain_data/task/obtain_update_files.php b/phpBB/phpbb/install/module/obtain_data/task/obtain_update_files.php
new file mode 100644
index 0000000000..0cb809154e
--- /dev/null
+++ b/phpBB/phpbb/install/module/obtain_data/task/obtain_update_files.php
@@ -0,0 +1,113 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\obtain_data\task;
+
+use phpbb\install\exception\user_interaction_required_exception;
+use phpbb\install\helper\config;
+use phpbb\install\helper\iohandler\iohandler_interface;
+use phpbb\install\task_base;
+
+class obtain_update_files extends task_base
+{
+	/**
+	 * @var config
+	 */
+	protected $installer_config;
+
+	/**
+	 * @var iohandler_interface
+	 */
+	protected $iohandler;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * @var string
+	 */
+	protected $php_ext;
+
+	/**
+	 * Constructor
+	 *
+	 * @param config				$config
+	 * @param iohandler_interface	$iohandler
+	 * @param string				$phpbb_root_path
+	 * @param string				$php_ext
+	 */
+	public function __construct(config $config, iohandler_interface $iohandler, $phpbb_root_path, $php_ext)
+	{
+		$this->installer_config	= $config;
+		$this->iohandler		= $iohandler;
+		$this->phpbb_root_path	= $phpbb_root_path;
+		$this->php_ext			= $php_ext;
+
+		parent::__construct(false);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function check_requirements()
+	{
+		return $this->installer_config->get('do_update_files', false);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		// Load update info file
+		// The file should be checked in the requirements, so we assume that it exists
+		$update_info_file = $this->phpbb_root_path . 'install/update/index.' . $this->php_ext;
+		include($update_info_file);
+		$info = (empty($update_info) || !is_array($update_info)) ? false : $update_info;
+
+		// If the file is invalid, abort mission
+		if (!$info)
+		{
+			$this->iohandler->add_error_message('WRONG_INFO_FILE_FORMAT');
+			throw new user_interaction_required_exception();
+		}
+
+		// Replace .php with $this->php_ext if needed
+		if ($this->php_ext !== 'php')
+		{
+			$custom_extension = '.' . $this->php_ext;
+			$info['files'] = preg_replace('#\.php$#i', $custom_extension, $info['files']);
+		}
+
+		// Save update info
+		$this->installer_config->set('update_info_unprocessed', $info);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 0;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return '';
+	}
+}
diff --git a/phpBB/phpbb/install/module/obtain_data/task/obtain_update_ftp_data.php b/phpBB/phpbb/install/module/obtain_data/task/obtain_update_ftp_data.php
new file mode 100644
index 0000000000..3c17576c13
--- /dev/null
+++ b/phpBB/phpbb/install/module/obtain_data/task/obtain_update_ftp_data.php
@@ -0,0 +1,163 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\obtain_data\task;
+
+use phpbb\install\exception\user_interaction_required_exception;
+use phpbb\install\helper\config;
+use phpbb\install\helper\iohandler\iohandler_interface;
+use phpbb\install\helper\update_helper;
+use phpbb\install\task_base;
+
+class obtain_update_ftp_data extends task_base
+{
+	/**
+	 * @var \phpbb\install\helper\config
+	 */
+	protected $installer_config;
+
+	/**
+	 * @var \phpbb\install\helper\iohandler\iohandler_interface
+	 */
+	protected $iohandler;
+
+	/**
+	 * @var update_helper
+	 */
+	protected $update_helper;
+
+	/**
+	 * @var string
+	 */
+	protected $php_ext;
+
+	/**
+	 * Constructor
+	 *
+	 * @param config				$installer_config
+	 * @param iohandler_interface	$iohandler
+	 * @param update_helper			$update_helper
+	 * @param string				$php_ext
+	 */
+	public function __construct(config $installer_config, iohandler_interface $iohandler, update_helper $update_helper, $php_ext)
+	{
+		$this->installer_config	= $installer_config;
+		$this->iohandler		= $iohandler;
+		$this->update_helper	= $update_helper;
+		$this->php_ext			= $php_ext;
+
+		parent::__construct(false);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function check_requirements()
+	{
+		return ($this->installer_config->get('do_update_files', false) &&
+			($this->installer_config->get('file_update_method', '') === 'ftp')
+		);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		if ($this->iohandler->get_input('submit_ftp', false))
+		{
+			$this->update_helper->include_file('includes/functions_transfer.' . $this->php_ext);
+
+			$method = 'ftp';
+			$methods = \transfer::methods();
+			if (!in_array($method, $methods, true))
+			{
+				$method = $methods[0];
+			}
+
+			$ftp_host = $this->iohandler->get_input('ftp_host', '', true);
+			$ftp_user = $this->iohandler->get_input('ftp_user', '', true);
+			$ftp_pass = htmlspecialchars_decode($this->iohandler->get_input('ftp_pass', '', true));
+			$ftp_path = $this->iohandler->get_input('ftp_path', '', true);
+			$ftp_port = $this->iohandler->get_input('ftp_port', 21);
+			$ftp_time = $this->iohandler->get_input('ftp_timeout', 10);
+
+			$this->installer_config->set('ftp_host', $ftp_host);
+			$this->installer_config->set('ftp_user', $ftp_user);
+			$this->installer_config->set('ftp_pass', $ftp_pass);
+			$this->installer_config->set('ftp_path', $ftp_path);
+			$this->installer_config->set('ftp_port', (int) $ftp_port);
+			$this->installer_config->set('ftp_timeout', (int) $ftp_time);
+			$this->installer_config->set('ftp_method', $method);
+		}
+		else
+		{
+			$this->iohandler->add_user_form_group('FTP_SETTINGS', array(
+				'ftp_host'	=> array(
+					'label'			=> 'FTP_HOST',
+					'description'	=> 'FTP_HOST_EXPLAIN',
+					'type'			=> 'text',
+				),
+				'ftp_user'	=> array(
+					'label'			=> 'FTP_USERNAME',
+					'description'	=> 'FTP_USERNAME_EXPLAIN',
+					'type'			=> 'text',
+				),
+				'ftp_pass'	=> array(
+					'label'			=> 'FTP_PASSWORD',
+					'description'	=> 'FTP_PASSWORD_EXPLAIN',
+					'type'			=> 'password',
+				),
+				'ftp_path'	=> array(
+					'label'			=> 'FTP_ROOT_PATH',
+					'description'	=> 'FTP_ROOT_PATH_EXPLAIN',
+					'type'			=> 'text',
+				),
+				'ftp_port'	=> array(
+					'label'			=> 'FTP_PORT',
+					'description'	=> 'FTP_PORT_EXPLAIN',
+					'type'			=> 'text',
+					'default'		=> 21,
+				),
+				'ftp_timeout'	=> array(
+					'label'			=> 'FTP_TIMEOUT',
+					'description'	=> 'FTP_TIMEOUT_EXPLAIN',
+					'type'			=> 'text',
+					'default'		=> 10,
+				),
+				'submit_ftp'	=> array(
+					'label'	=> 'SUBMIT',
+					'type'	=> 'submit',
+				),
+			));
+
+			throw new user_interaction_required_exception();
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 0;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return '';
+	}
+}
diff --git a/phpBB/phpbb/install/module/obtain_data/task/obtain_update_settings.php b/phpBB/phpbb/install/module/obtain_data/task/obtain_update_settings.php
new file mode 100644
index 0000000000..3b24e8ba40
--- /dev/null
+++ b/phpBB/phpbb/install/module/obtain_data/task/obtain_update_settings.php
@@ -0,0 +1,123 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\obtain_data\task;
+
+use phpbb\install\exception\user_interaction_required_exception;
+use phpbb\install\helper\config;
+use phpbb\install\helper\iohandler\iohandler_interface;
+use phpbb\install\task_base;
+
+class obtain_update_settings extends task_base
+{
+	/**
+	 * @var \phpbb\install\helper\config
+	 */
+	protected $installer_config;
+
+	/**
+	 * @var \phpbb\install\helper\iohandler\iohandler_interface
+	 */
+	protected $iohandler;
+
+	/**
+	 * Constructor
+	 *
+	 * @param config				$installer_config
+	 * @param iohandler_interface	$iohandler
+	 */
+	public function __construct(config $installer_config, iohandler_interface $iohandler)
+	{
+		$this->installer_config	= $installer_config;
+		$this->iohandler		= $iohandler;
+
+		parent::__construct(true);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		// Check if data is sent
+		if ($this->iohandler->get_input('submit_update', false))
+		{
+			$update_files = $this->iohandler->get_input('update_type', 'all') === 'all';
+
+			if ($this->installer_config->get('disable_filesystem_update', false) && $update_files)
+			{
+				$this->iohandler->add_error_message('UPDATE_FILES_NOT_FOUND');
+
+				throw new user_interaction_required_exception();
+			}
+
+			$this->installer_config->set('do_update_files', $update_files);
+		}
+		else
+		{
+			if ($this->installer_config->get('disable_filesystem_update', false))
+			{
+				$options[] = array(
+					'value'		=> 'db_only',
+					'label'		=> 'UPDATE_TYPE_DB_ONLY',
+					'selected'	=> true,
+				);
+			}
+			else
+			{
+				$options = array(
+					array(
+						'value'		=> 'all',
+						'label'		=> 'UPDATE_TYPE_ALL',
+						'selected'	=> true,
+					),
+					array(
+						'value'		=> 'db_only',
+						'label'		=> 'UPDATE_TYPE_DB_ONLY',
+						'selected'	=> false,
+					),
+				);
+			}
+
+			$this->iohandler->add_user_form_group('UPDATE_TYPE', array(
+				'update_type' => array(
+					'label'		=> 'UPDATE_TYPE',
+					'type'		=> 'radio',
+					'options'	=> $options,
+				),
+				'submit_update' => array(
+					'label'	=> 'SUBMIT',
+					'type'	=> 'submit',
+				),
+			));
+
+			throw new user_interaction_required_exception();
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 0;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return '';
+	}
+}
diff --git a/phpBB/phpbb/install/module/obtain_data/update_module.php b/phpBB/phpbb/install/module/obtain_data/update_module.php
new file mode 100644
index 0000000000..c2f9019d34
--- /dev/null
+++ b/phpBB/phpbb/install/module/obtain_data/update_module.php
@@ -0,0 +1,33 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\obtain_data;
+
+class update_module extends \phpbb\install\module_base
+{
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_navigation_stage_path()
+	{
+		return array('update', 0, 'obtain_data');
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_step_count()
+	{
+		return 0;
+	}
+}
diff --git a/phpBB/phpbb/install/module/requirements/abstract_requirements_module.php b/phpBB/phpbb/install/module/requirements/abstract_requirements_module.php
new file mode 100644
index 0000000000..121b4ff4e5
--- /dev/null
+++ b/phpBB/phpbb/install/module/requirements/abstract_requirements_module.php
@@ -0,0 +1,71 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\requirements;
+
+use phpbb\install\exception\user_interaction_required_exception;
+use phpbb\install\module_base;
+
+/**
+ * Base class for requirements installer module
+ */
+abstract class abstract_requirements_module extends module_base
+{
+	public function run()
+	{
+		$tests_passed = true;
+		foreach ($this->task_collection as $name => $task)
+		{
+			// Check if we can run the task
+			if (!$task->is_essential() && !$task->check_requirements())
+			{
+				continue;
+			}
+
+			if ($this->allow_progress_bar)
+			{
+				$this->install_config->increment_current_task_progress();
+			}
+
+			$test_result = $task->run();
+			$tests_passed = ($tests_passed) ? $test_result : false;
+		}
+
+		// Module finished, so clear task progress
+		$this->install_config->set_finished_task(0);
+
+		// Check if tests have failed
+		if (!$tests_passed)
+		{
+			// If requirements are not met, exit form installer
+			// Set up UI for retesting
+			$this->iohandler->add_user_form_group('', array(
+				'install'	=> array(
+					'label'	=> 'RETEST_REQUIREMENTS',
+					'type'	=> 'submit',
+				),
+			));
+
+			// Send the response and quit
+			throw new user_interaction_required_exception();
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_step_count()
+	{
+		return 0;
+	}
+}
diff --git a/phpBB/phpbb/install/module/requirements/install_module.php b/phpBB/phpbb/install/module/requirements/install_module.php
new file mode 100644
index 0000000000..ed0c5fbd94
--- /dev/null
+++ b/phpBB/phpbb/install/module/requirements/install_module.php
@@ -0,0 +1,25 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\requirements;
+
+class install_module extends abstract_requirements_module
+{
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_navigation_stage_path()
+	{
+		return array('install', 0, 'requirements');
+	}
+}
diff --git a/phpBB/phpbb/install/module/requirements/task/check_filesystem.php b/phpBB/phpbb/install/module/requirements/task/check_filesystem.php
new file mode 100644
index 0000000000..868af39433
--- /dev/null
+++ b/phpBB/phpbb/install/module/requirements/task/check_filesystem.php
@@ -0,0 +1,279 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\requirements\task;
+
+/**
+ * Checks filesystem requirements
+ */
+class check_filesystem extends \phpbb\install\task_base
+{
+	/**
+	 * @var \phpbb\filesystem\filesystem_interface
+	 */
+	protected $filesystem;
+
+	/**
+	 * @var array
+	 */
+	protected $files_to_check;
+
+	/**
+	 * @var bool
+	 */
+	protected $tests_passed;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * @var \phpbb\install\helper\iohandler\iohandler_interface
+	 */
+	protected $response;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\filesystem\filesystem_interface				$filesystem			filesystem handler
+	 * @param \phpbb\install\helper\iohandler\iohandler_interface	$response			response helper
+	 * @param string												$phpbb_root_path	relative path to phpBB's root
+	 * @param string												$php_ext			extension of php files
+	 * @param bool													$check_config_php	Whether or not to check if config.php is writable
+	 */
+	public function __construct(\phpbb\filesystem\filesystem_interface $filesystem, \phpbb\install\helper\iohandler\iohandler_interface $response, $phpbb_root_path, $php_ext, $check_config_php = true)
+	{
+		parent::__construct(true);
+
+		$this->filesystem		= $filesystem;
+		$this->response			= $response;
+		$this->phpbb_root_path	= $phpbb_root_path;
+
+		$this->tests_passed = false;
+
+		// Files/Directories to check
+		// All file/directory names must be relative to phpBB's root path
+		$this->files_to_check = array(
+			array(
+				'path' => 'cache/',
+				'failable' => false,
+				'is_file' => false,
+			),
+			array(
+				'path' => 'store/',
+				'failable' => false,
+				'is_file' => false,
+			),
+			array(
+				'path' => 'files/',
+				'failable' => false,
+				'is_file' => false,
+			),
+			array(
+				'path' => 'images/avatars/upload/',
+				'failable' => true,
+				'is_file' => false,
+			),
+		);
+
+		if ($check_config_php)
+		{
+			$this->files_to_check[] = array(
+				'path' => "config.$php_ext",
+				'failable' => false,
+				'is_file' => true,
+			);
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		$this->tests_passed = true;
+
+		// Check files/directories to be writable
+		foreach ($this->files_to_check as $file)
+		{
+			if ($file['is_file'])
+			{
+				$this->check_file($file['path'], $file['failable']);
+			}
+			else
+			{
+				$this->check_dir($file['path'], $file['failable']);
+			}
+		}
+
+		return $this->tests_passed;
+	}
+
+	/**
+	 * Sets $this->tests_passed
+	 *
+	 * @param	bool	$is_passed
+	 */
+	protected function set_test_passed($is_passed)
+	{
+		// If one test failed, tests_passed should be false
+		$this->tests_passed = (!$this->tests_passed) ? false : $is_passed;
+	}
+
+	/**
+	 * Check if a file is readable and writable
+	 *
+	 * @param string	$file		Filename
+	 * @param bool		$failable	Whether failing test should interrupt installation process
+	 */
+	protected function check_file($file, $failable = false)
+	{
+		$path = $this->phpbb_root_path . $file;
+		$exists = $writable = true;
+
+		// Try to create file if it does not exists
+		if (!file_exists($path))
+		{
+			$fp = @fopen($path, 'w');
+			@fclose($fp);
+			try
+			{
+				$this->filesystem->phpbb_chmod($path,
+					\phpbb\filesystem\filesystem_interface::CHMOD_READ | \phpbb\filesystem\filesystem_interface::CHMOD_WRITE
+				);
+				$exists = true;
+			}
+			catch (\phpbb\filesystem\exception\filesystem_exception $e)
+			{
+				// Do nothing
+			}
+		}
+
+		if (file_exists($path))
+		{
+			if (!$this->filesystem->is_writable($path))
+			{
+				$writable = false;
+			}
+		}
+		else
+		{
+			$exists = $writable = false;
+		}
+
+		$this->set_test_passed(($exists && $writable) || $failable);
+
+		if (!($exists && $writable))
+		{
+			$title = ($exists) ? 'FILE_NOT_WRITABLE' : 'FILE_NOT_EXISTS';
+			$lang_suffix = '_EXPLAIN';
+			$lang_suffix .= ($failable) ? '_OPTIONAL' : '';
+			$description = array($title . $lang_suffix, $file);
+
+			if ($failable)
+			{
+				$this->response->add_warning_message($title, $description);
+			}
+			else
+			{
+				$this->response->add_error_message($title, $description);
+			}
+		}
+	}
+
+	/**
+	 * Check if a directory is readable and writable
+	 *
+	 * @param string	$dir		Filename
+	 * @param bool		$failable	Whether failing test should abort the installation process
+	 */
+	protected function check_dir($dir, $failable = false)
+	{
+		$path = $this->phpbb_root_path . $dir;
+		$exists = $writable = false;
+
+		// Try to create the directory if it does not exist
+		if (!file_exists($path))
+		{
+			try
+			{
+				$this->filesystem->mkdir($path, 0777);
+				$this->filesystem->phpbb_chmod($path,
+					\phpbb\filesystem\filesystem_interface::CHMOD_READ | \phpbb\filesystem\filesystem_interface::CHMOD_WRITE
+				);
+				$exists = true;
+			}
+			catch (\phpbb\filesystem\exception\filesystem_exception $e)
+			{
+				// Do nothing
+			}
+		}
+
+		// Now really check
+		if (file_exists($path) && is_dir($path))
+		{
+			try
+			{
+				$exists = true;
+				$this->filesystem->phpbb_chmod($path,
+					\phpbb\filesystem\filesystem_interface::CHMOD_READ | \phpbb\filesystem\filesystem_interface::CHMOD_WRITE
+				);
+			}
+			catch (\phpbb\filesystem\exception\filesystem_exception $e)
+			{
+				// Do nothing
+			}
+		}
+
+		if ($this->filesystem->is_writable($path))
+		{
+			$writable = true;
+		}
+
+		$this->set_test_passed(($exists && $writable) || $failable);
+
+		if (!($exists && $writable))
+		{
+			$title = ($exists) ? 'DIRECTORY_NOT_WRITABLE' : 'DIRECTORY_NOT_EXISTS';
+			$lang_suffix = '_EXPLAIN';
+			$lang_suffix .= ($failable) ? '_OPTIONAL' : '';
+			$description = array($title . $lang_suffix, $dir);
+
+			if ($failable)
+			{
+				$this->response->add_warning_message($title, $description);
+			}
+			else
+			{
+				$this->response->add_error_message($title, $description);
+			}
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 0;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return '';
+	}
+}
diff --git a/phpBB/phpbb/install/module/requirements/task/check_server_environment.php b/phpBB/phpbb/install/module/requirements/task/check_server_environment.php
new file mode 100644
index 0000000000..29f9777747
--- /dev/null
+++ b/phpBB/phpbb/install/module/requirements/task/check_server_environment.php
@@ -0,0 +1,209 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\requirements\task;
+
+/**
+ * Installer task that checks if the server meats phpBB requirements
+ */
+class check_server_environment extends \phpbb\install\task_base
+{
+	/**
+	 * @var \phpbb\install\helper\database
+	 */
+	protected $database_helper;
+
+	/**
+	 * @var \phpbb\install\helper\iohandler\iohandler_interface
+	 */
+	protected $response_helper;
+
+	/**
+	 * @var bool
+	 */
+	protected $tests_passed;
+
+	/**
+	 * Constructor
+	 *
+	 * @param	\phpbb\install\helper\database	$database_helper
+	 * @param	\phpbb\install\helper\iohandler\iohandler_interface	$response
+	 */
+	public function __construct(\phpbb\install\helper\database $database_helper,
+								\phpbb\install\helper\iohandler\iohandler_interface $response)
+	{
+		$this->database_helper	= $database_helper;
+		$this->response_helper	= $response;
+		$this->tests_passed		= true;
+
+		parent::__construct(true);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		//
+		// Check requirements
+		// The error messages should be set in the check_ functions
+		//
+
+		// Check PHP version
+		$this->check_php_version();
+
+		// Check for getimagesize()
+		$this->check_image_size();
+
+		// Check for PCRE support
+		$this->check_pcre();
+
+		// Check for JSON support
+		$this->check_json();
+
+		// XML extension support check
+		$this->check_xml();
+
+		// Check for dbms support
+		$this->check_available_dbms();
+
+		return $this->tests_passed;
+	}
+
+	/**
+	 * Sets $this->tests_passed
+	 *
+	 * @param	bool	$is_passed
+	 */
+	protected function set_test_passed($is_passed)
+	{
+		// If one test failed, tests_passed should be false
+		$this->tests_passed = (!$this->tests_passed) ? false : $is_passed;
+	}
+
+	/**
+	 * Check if the requirements for PHP version is met
+	 */
+	protected function check_php_version()
+	{
+		$php_version = PHP_VERSION;
+
+		if (version_compare($php_version, '5.4') < 0)
+		{
+			$this->response_helper->add_error_message('PHP_VERSION_REQD', 'PHP_VERSION_REQD_EXPLAIN');
+
+			$this->set_test_passed(false);
+			return;
+		}
+
+		$this->set_test_passed(true);
+	}
+
+	/**
+	 * Checks if the installed PHP has getimagesize() available
+	 */
+	protected function check_image_size()
+	{
+		if (!@function_exists('getimagesize'))
+		{
+			$this->response_helper->add_error_message('PHP_GETIMAGESIZE_SUPPORT', 'PHP_GETIMAGESIZE_SUPPORT_EXPLAIN');
+
+			$this->set_test_passed(false);
+			return;
+		}
+
+		$this->set_test_passed(true);
+	}
+
+	/**
+	 * Checks if the installed PHP supports PCRE
+	 */
+	protected function check_pcre()
+	{
+		if (@preg_match('//u', ''))
+		{
+			$this->set_test_passed(true);
+			return;
+		}
+
+		$this->response_helper->add_error_message('PCRE_UTF_SUPPORT', 'PCRE_UTF_SUPPORT_EXPLAIN');
+
+		$this->set_test_passed(false);
+	}
+
+	/**
+	 * Checks whether PHP's JSON extension is available or not
+	 */
+	protected function check_json()
+	{
+		if (@extension_loaded('json'))
+		{
+			$this->set_test_passed(true);
+			return;
+		}
+
+		$this->response_helper->add_error_message('PHP_JSON_SUPPORT', 'PHP_JSON_SUPPORT_EXPLAIN');
+
+		$this->set_test_passed(false);
+	}
+
+	/**
+	 * Checks whether or not the XML PHP extension is available (Required by the text formatter)
+	 */
+	protected function check_xml()
+	{
+		if (class_exists('DOMDocument'))
+		{
+			$this->set_test_passed(true);
+			return;
+		}
+
+		$this->response_helper->add_error_message('PHP_XML_SUPPORT', 'PHP_XML_SUPPORT_EXPLAIN');
+
+		$this->set_test_passed(false);
+	}
+
+	/**
+	 * Check if any supported DBMS is available
+	 */
+	protected function check_available_dbms()
+	{
+		$available_dbms = $this->database_helper->get_available_dbms(false, true);
+
+		if ($available_dbms['ANY_DB_SUPPORT'])
+		{
+			$this->set_test_passed(true);
+			return;
+		}
+
+		$this->response_helper->add_error_message('PHP_SUPPORTED_DB', 'PHP_SUPPORTED_DB_EXPLAIN');
+
+		$this->set_test_passed(false);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 0;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return '';
+	}
+}
diff --git a/phpBB/phpbb/install/module/requirements/task/check_update.php b/phpBB/phpbb/install/module/requirements/task/check_update.php
new file mode 100644
index 0000000000..4eb2c6d75e
--- /dev/null
+++ b/phpBB/phpbb/install/module/requirements/task/check_update.php
@@ -0,0 +1,198 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\requirements\task;
+
+use phpbb\filesystem\filesystem;
+use phpbb\install\helper\config;
+use phpbb\install\helper\container_factory;
+use phpbb\install\helper\iohandler\iohandler_interface;
+use phpbb\install\helper\update_helper;
+use phpbb\install\task_base;
+
+/**
+ * Check the availability of updater files and update version
+ */
+class check_update extends task_base
+{
+	/**
+	 * @var \phpbb\config\db
+	 */
+	protected $config;
+
+	/**
+	 * @var filesystem
+	 */
+	protected $filesystem;
+
+	/**
+	 * @var config
+	 */
+	protected $installer_config;
+
+	/**
+	 * @var iohandler_interface
+	 */
+	protected $iohandler;
+
+	/**
+	 * @var update_helper
+	 */
+	protected $update_helper;
+
+	/**
+	 * @var \phpbb\version_helper
+	 */
+	protected $version_helper;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * @var string
+	 */
+	protected $php_ext;
+
+	/**
+	 * @var bool
+	 */
+	protected $tests_passed;
+
+	/**
+	 * Constructor
+	 *
+	 * @param container_factory		$container
+	 * @param filesystem			$filesystem
+	 * @param config				$config
+	 * @param iohandler_interface	$iohandler
+	 * @param update_helper			$update_helper
+	 * @param string				$phpbb_root_path
+	 * @param string				$php_ext
+	 */
+	public function __construct(container_factory $container, filesystem $filesystem, config $config, iohandler_interface $iohandler, update_helper $update_helper, $phpbb_root_path, $php_ext)
+	{
+		$this->filesystem		= $filesystem;
+		$this->installer_config	= $config;
+		$this->iohandler		= $iohandler;
+		$this->update_helper	= $update_helper;
+		$this->phpbb_root_path	= $phpbb_root_path;
+		$this->php_ext			= $php_ext;
+		$this->tests_passed		= true;
+
+		$this->config			= $container->get('config');
+		$this->version_helper	= $container->get('version_helper');
+
+		parent::__construct(true);
+	}
+
+	/**
+	 * Sets $this->tests_passed
+	 *
+	 * @param	bool	$is_passed
+	 */
+	protected function set_test_passed($is_passed)
+	{
+		// If one test failed, tests_passed should be false
+		$this->tests_passed = $this->tests_passed && $is_passed;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		// Array of update files
+		$update_files = array(
+			$this->phpbb_root_path . 'install/update',
+			$this->phpbb_root_path . 'install/update/index.' . $this->php_ext,
+		);
+
+		// Check for a valid update directory
+		if (!$this->filesystem->exists($update_files) || !$this->filesystem->is_readable($update_files))
+		{
+			if ($this->iohandler->get_input('update_type', 'all') === 'all')
+			{
+				$this->iohandler->add_warning_message('UPDATE_FILES_NOT_FOUND');
+				$this->set_test_passed(false);
+			}
+
+			// If there are no update files, we can't check the version etc
+			// However, we can let the users run migrations if they really want to...
+			$this->installer_config->set('disable_filesystem_update', true);
+			return true;
+		}
+
+		// Recover version numbers
+		$update_info = array();
+		@include($this->phpbb_root_path . 'install/update/index.' . $this->php_ext);
+		$info = (empty($update_info) || !is_array($update_info)) ? false : $update_info;
+		$update_version = false;
+
+		if ($info !== false)
+		{
+			$update_version = (!empty($info['version']['to'])) ? trim($info['version']['to']) : false;
+		}
+
+		// Get current and latest version
+		try
+		{
+			$latest_version = $this->version_helper->get_latest_on_current_branch(true);
+		}
+		catch (\RuntimeException $e)
+		{
+			$latest_version = $update_version;
+		}
+
+		$current_version = (!empty($this->config['version_update_from'])) ? $this->config['version_update_from'] : $this->config['version'];
+
+		// Check if the update package
+		if (!$this->update_helper->phpbb_version_compare($current_version, $update_version, '<'))
+		{
+			$this->iohandler->add_error_message('NO_UPDATE_FILES_UP_TO_DATE');
+			$this->tests_passed = false;
+		}
+
+		// Check if the update package works with the installed version
+		if (empty($info['version']['from']) || $info['version']['from'] !== $current_version)
+		{
+			$this->iohandler->add_error_message(array('INCOMPATIBLE_UPDATE_FILES', $current_version, $info['version']['from'], $update_version));
+			$this->tests_passed = false;
+		}
+
+		// check if this is the latest update package
+		if ($this->update_helper->phpbb_version_compare($update_version, $latest_version, '<'))
+		{
+			$this->iohandler->add_warning_message(array('OLD_UPDATE_FILES', $info['version']['from'], $update_version, $latest_version));
+		}
+
+		return $this->tests_passed;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 0;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return '';
+	}
+}
diff --git a/phpBB/phpbb/install/module/requirements/update_module.php b/phpBB/phpbb/install/module/requirements/update_module.php
new file mode 100644
index 0000000000..223d12faf3
--- /dev/null
+++ b/phpBB/phpbb/install/module/requirements/update_module.php
@@ -0,0 +1,25 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\requirements;
+
+class update_module extends abstract_requirements_module
+{
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_navigation_stage_path()
+	{
+		return array('update', 0, 'requirements');
+	}
+}
diff --git a/phpBB/phpbb/install/module/update_database/module.php b/phpBB/phpbb/install/module/update_database/module.php
new file mode 100644
index 0000000000..ee38afe17d
--- /dev/null
+++ b/phpBB/phpbb/install/module/update_database/module.php
@@ -0,0 +1,33 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\update_database;
+
+class module extends \phpbb\install\module_base
+{
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_navigation_stage_path()
+	{
+		return array('update', 0, 'update_database');
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_step_count()
+	{
+		return 0;
+	}
+}
diff --git a/phpBB/phpbb/install/module/update_database/task/update.php b/phpBB/phpbb/install/module/update_database/task/update.php
new file mode 100644
index 0000000000..fb9eb44e6a
--- /dev/null
+++ b/phpBB/phpbb/install/module/update_database/task/update.php
@@ -0,0 +1,234 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\update_database\task;
+
+use phpbb\db\migration\exception;
+use phpbb\db\output_handler\installer_migrator_output_handler;
+use phpbb\db\output_handler\log_wrapper_migrator_output_handler;
+use phpbb\install\exception\resource_limit_reached_exception;
+use phpbb\install\exception\user_interaction_required_exception;
+use phpbb\install\task_base;
+
+/**
+ * Database updater task
+ */
+class update extends task_base
+{
+	/**
+	 * @var \phpbb\cache\driver\driver_interface
+	 */
+	protected $cache;
+
+	/**
+	 * @var \phpbb\config\config
+	 */
+	protected $config;
+
+	/**
+	 * @var \phpbb\extension\manager
+	 */
+	protected $extension_manager;
+
+	/**
+	 * @var \phpbb\filesystem\filesystem
+	 */
+	protected $filesystem;
+
+	/**
+	 * @var \phpbb\install\helper\config
+	 */
+	protected $installer_config;
+
+	/**
+	 * @var \phpbb\install\helper\iohandler\iohandler_interface
+	 */
+	protected $iohandler;
+
+	/**
+	 * @var \phpbb\language\language
+	 */
+	protected $language;
+
+	/**
+	 * @var \phpbb\log\log
+	 */
+	protected $log;
+
+	/**
+	 * @var \phpbb\db\migrator
+	 */
+	protected $migrator;
+
+	/**
+	 * @var \phpbb\user
+	 */
+	protected $user;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\install\helper\container_factory				$container
+	 * @param \phpbb\filesystem\filesystem							$filesystem
+	 * @param \phpbb\install\helper\config							$installer_config
+	 * @param \phpbb\install\helper\iohandler\iohandler_interface	$iohandler
+	 * @param \phpbb\language\language								$language
+	 * @param string												$phpbb_root_path
+	 */
+	public function __construct(\phpbb\install\helper\container_factory $container, \phpbb\filesystem\filesystem $filesystem, \phpbb\install\helper\config $installer_config, \phpbb\install\helper\iohandler\iohandler_interface $iohandler, \phpbb\language\language $language, $phpbb_root_path)
+	{
+		$this->filesystem			= $filesystem;
+		$this->installer_config		= $installer_config;
+		$this->iohandler			= $iohandler;
+		$this->language				= $language;
+		$this->phpbb_root_path		= $phpbb_root_path;
+
+		$this->cache				= $container->get('cache.driver');
+		$this->config				= $container->get('config');
+		$this->extension_manager	= $container->get('ext.manager');
+		$this->log					= $container->get('log');
+		$this->migrator				= $container->get('migrator');
+		$this->user					= $container->get('user');
+
+		parent::__construct(true);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		$this->language->add_lang('migrator');
+
+		if (!isset($this->config['version_update_from']))
+		{
+			$this->config->set('version_update_from', $this->config['version']);
+		}
+
+		$original_version = $this->config['version_update_from'];
+
+		$this->migrator->set_output_handler(
+			new log_wrapper_migrator_output_handler(
+				$this->language,
+				new installer_migrator_output_handler($this->iohandler),
+				$this->phpbb_root_path . 'store/migrations_' . time() . '.log',
+				$this->filesystem
+			)
+		);
+
+		$this->migrator->create_migrations_table();
+
+		$migrations = $this->extension_manager
+			->get_finder()
+			->core_path('phpbb/db/migration/data/')
+			->extension_directory('/migrations')
+			->get_classes();
+
+		$this->migrator->set_migrations($migrations);
+
+		$migration_step_count = $this->installer_config->get('database_update_migration_steps', -1);
+		if ($migration_step_count < 0)
+		{
+			$migration_step_count = count($this->migrator->get_installable_migrations()) * 2;
+			$this->installer_config->set('database_update_migration_steps', $migration_step_count);
+		}
+
+		$progress_count = $this->installer_config->get('database_update_count', 0);
+		$restart_progress_bar = ($progress_count === 0); // Only "restart" when the update runs for the first time
+		$this->iohandler->set_task_count($migration_step_count, $restart_progress_bar);
+		$this->installer_config->set_task_progress_count($migration_step_count);
+
+		while (!$this->migrator->finished())
+		{
+			try
+			{
+				$this->migrator->update();
+				$progress_count++;
+
+				$last_run_migration = $this->migrator->get_last_run_migration();
+				if (isset($last_run_migration['effectively_installed']) && $last_run_migration['effectively_installed'])
+				{
+					// We skipped two step, so increment $progress_count by another one
+					$progress_count++;
+				}
+				else if (($last_run_migration['task'] === 'process_schema_step' && !$last_run_migration['state']['migration_schema_done']) ||
+					($last_run_migration['task'] === 'process_data_step' && !$last_run_migration['state']['migration_data_done']))
+				{
+					// We just run a step that wasn't counted yet so make it count
+					$migration_step_count++;
+				}
+
+				$this->iohandler->set_task_count($migration_step_count);
+				$this->installer_config->set_task_progress_count($migration_step_count);
+				$this->iohandler->set_progress('STAGE_UPDATE_DATABASE', $progress_count);
+			}
+			catch (exception $e)
+			{
+				$msg = $e->getParameters();
+				array_unshift($msg, $e->getMessage());
+
+				$this->iohandler->add_error_message($msg);
+				throw new user_interaction_required_exception();
+			}
+
+			if ($this->installer_config->get_time_remaining() <= 0 || $this->installer_config->get_memory_remaining() <= 0)
+			{
+				$this->installer_config->set('database_update_count', $progress_count);
+				$this->installer_config->set('database_update_migration_steps', $migration_step_count);
+				throw new resource_limit_reached_exception();
+			}
+		}
+
+		if ($original_version !== $this->config['version'])
+		{
+			$this->log->add(
+				'admin',
+				(isset($this->user->data['user_id'])) ? $this->user->data['user_id'] : ANONYMOUS,
+				$this->user->ip,
+				'LOG_UPDATE_DATABASE',
+				false,
+				array(
+					$original_version,
+					$this->config['version']
+				)
+			);
+		}
+
+		$this->iohandler->add_success_message('INLINE_UPDATE_SUCCESSFUL');
+
+		$this->cache->purge();
+
+		$this->config->increment('assets_version', 1);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 0;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return '';
+	}
+}
diff --git a/phpBB/phpbb/install/module/update_database/task/update_extensions.php b/phpBB/phpbb/install/module/update_database/task/update_extensions.php
new file mode 100644
index 0000000000..0195b9c661
--- /dev/null
+++ b/phpBB/phpbb/install/module/update_database/task/update_extensions.php
@@ -0,0 +1,263 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\update_database\task;
+
+use phpbb\install\exception\resource_limit_reached_exception;
+use phpbb\install\helper\container_factory;
+use phpbb\install\helper\config;
+use phpbb\install\helper\iohandler\iohandler_interface;
+use phpbb\install\helper\update_helper;
+use phpbb\install\task_base;
+use Symfony\Component\Finder\Finder;
+
+/**
+ * Installs extensions that exist in ext folder upon install
+ */
+class update_extensions extends task_base
+{
+	/**
+	 * @var \phpbb\cache\driver\driver_interface
+	 */
+	protected $cache;
+
+	/**
+	 * @var config
+	 */
+	protected $install_config;
+
+	/**
+	 * @var iohandler_interface
+	 */
+	protected $iohandler;
+
+	/** @var update_helper */
+	protected $update_helper;
+
+	/**
+	 * @var \phpbb\config\db
+	 */
+	protected $config;
+
+	/**
+	 * @var \phpbb\log\log_interface
+	 */
+	protected $log;
+
+	/**
+	 * @var \phpbb\user
+	 */
+	protected $user;
+
+	/** @var \phpbb\extension\manager */
+	protected $extension_manager;
+
+	/** @var Finder */
+	protected $finder;
+
+	/** @var string Extension table */
+	protected $extension_table;
+
+	/** @var \phpbb\db\driver\driver_interface */
+	protected $db;
+
+	/**
+	 * @var array	List of default extensions to update, grouped by version
+	 *				they were added
+	 */
+	static public $default_extensions_update = [
+		'3.2.0-RC2' => ['phpbb/viglink']
+	];
+
+	/**
+	 * Constructor
+	 *
+	 * @param container_factory			$container
+	 * @param config					$install_config
+	 * @param iohandler_interface		$iohandler
+	 * @param $update_helper			$update_helper
+	 * @param string					$phpbb_root_path phpBB root path
+	 */
+	public function __construct(container_factory $container, config $install_config, iohandler_interface $iohandler, update_helper $update_helper, $phpbb_root_path)
+	{
+		$this->install_config	= $install_config;
+		$this->iohandler		= $iohandler;
+		$this->extension_table = $container->get_parameter('tables.ext');
+
+		$this->log				= $container->get('log');
+		$this->user				= $container->get('user');
+		$this->extension_manager = $container->get('ext.manager');
+		$this->cache				= $container->get('cache.driver');
+		$this->config			= $container->get('config');
+		$this->db				= $container->get('dbal.conn');
+		$this->update_helper = $update_helper;
+		$this->finder = new Finder();
+		$this->finder->in($phpbb_root_path . 'ext/')
+			->ignoreUnreadableDirs()
+			->depth('< 3')
+			->files()
+			->name('composer.json');
+
+		// Make sure asset version exists in config. Otherwise we might try to
+		// insert the assets_version setting into the database and cause a
+		// duplicate entry error.
+		if (!isset($this->config['assets_version']))
+		{
+			$this->config['assets_version'] = 0;
+		}
+
+		parent::__construct(true);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		$this->user->session_begin();
+		$this->user->setup(array('common', 'acp/common', 'cli'));
+
+		$update_info = $this->install_config->get('update_info_unprocessed', []);
+		$version_from = !empty($update_info) ? $update_info['version']['from'] : $this->config['version_update_from'];
+
+		if (!empty($version_from))
+		{
+			$update_extensions = $this->iohandler->get_input('update-extensions', []);
+
+			// Create list of default extensions that need to be enabled in update
+			$default_update_extensions = [];
+			foreach (self::$default_extensions_update as $version => $extensions)
+			{
+				if ($this->update_helper->phpbb_version_compare($version_from, $version, '<'))
+				{
+					$default_update_extensions = array_merge($default_update_extensions, $extensions);
+				}
+			}
+
+			$all_available_extensions = $this->extension_manager->all_available();
+			$i = $this->install_config->get('update_extensions_index', 0);
+			$available_extensions = array_slice($all_available_extensions, $i);
+
+			// Update available extensions
+			foreach ($available_extensions as $ext_name => $ext_path)
+			{
+				// Update extensions if:
+				//	1) Extension is currently enabled
+				//	2) Extension was implicitly defined as needing an update
+				//	3) Extension was newly added as default phpBB extension in
+				//		this update and should be enabled by default.
+				if ($this->extension_manager->is_enabled($ext_name) ||
+					in_array($ext_name, $update_extensions) ||
+					in_array($ext_name, $default_update_extensions)
+				)
+				{
+					try
+					{
+						$extension_enabled = $this->extension_manager->is_enabled($ext_name);
+						if ($extension_enabled)
+						{
+							$this->extension_manager->disable($ext_name);
+						}
+						$this->extension_manager->enable($ext_name);
+						$extensions = $this->get_extensions();
+
+						if (isset($extensions[$ext_name]) && $extensions[$ext_name]['ext_active'])
+						{
+							// Create log
+							$this->log->add('admin', ANONYMOUS, '', 'LOG_EXT_UPDATE', time(), array($ext_name));
+							$this->iohandler->add_success_message(array('CLI_EXTENSION_UPDATE_SUCCESS', $ext_name));
+						}
+						else
+						{
+							$this->iohandler->add_log_message('CLI_EXTENSION_UPDATE_FAILURE', array($ext_name));
+						}
+
+						// Disable extensions if it was disabled by the admin before
+						if (!$extension_enabled && !in_array($ext_name, $default_update_extensions))
+						{
+							$this->extension_manager->disable($ext_name);
+						}
+					}
+					catch (\Exception $e)
+					{
+						// Add fail log and continue
+						$this->iohandler->add_log_message('CLI_EXTENSION_UPDATE_FAILURE', array($ext_name));
+					}
+				}
+
+				$i++;
+
+				// Stop execution if resource limit is reached
+				if ($this->install_config->get_time_remaining() <= 0 || $this->install_config->get_memory_remaining() <= 0)
+				{
+					break;
+				}
+			}
+
+			$this->install_config->set('update_extensions_index', $i);
+
+			if ($i < count($all_available_extensions))
+			{
+				throw new resource_limit_reached_exception();
+			}
+		}
+
+		$this->config->delete('version_update_from');
+
+		$this->cache->purge();
+
+		$this->config->increment('assets_version', 1);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 1;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return 'TASK_UPDATE_EXTENSIONS';
+	}
+
+	/**
+	 * Get extensions from database
+	 *
+	 * @return array List of extensions
+	 */
+	private function get_extensions()
+	{
+		$sql = 'SELECT *
+			FROM ' . $this->extension_table;
+
+		$result = $this->db->sql_query($sql);
+		$extensions_row = $this->db->sql_fetchrowset($result);
+		$this->db->sql_freeresult($result);
+
+		$extensions = array();
+
+		foreach ($extensions_row as $extension)
+		{
+			$extensions[$extension['ext_name']] = $extension;
+		}
+
+		ksort($extensions);
+
+		return $extensions;
+	}
+}
diff --git a/phpBB/phpbb/install/module/update_filesystem/module.php b/phpBB/phpbb/install/module/update_filesystem/module.php
new file mode 100644
index 0000000000..157c78a1ac
--- /dev/null
+++ b/phpBB/phpbb/install/module/update_filesystem/module.php
@@ -0,0 +1,33 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\update_filesystem;
+
+class module extends \phpbb\install\module_base
+{
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_navigation_stage_path()
+	{
+		return array('update', 0, 'update_files');
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_step_count()
+	{
+		return 0;
+	}
+}
diff --git a/phpBB/phpbb/install/module/update_filesystem/task/diff_files.php b/phpBB/phpbb/install/module/update_filesystem/task/diff_files.php
new file mode 100644
index 0000000000..2f6048b4fd
--- /dev/null
+++ b/phpBB/phpbb/install/module/update_filesystem/task/diff_files.php
@@ -0,0 +1,253 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\update_filesystem\task;
+
+use phpbb\install\exception\resource_limit_reached_exception;
+use phpbb\install\exception\user_interaction_required_exception;
+use phpbb\install\helper\config;
+use phpbb\install\helper\container_factory;
+use phpbb\install\helper\iohandler\iohandler_interface;
+use phpbb\install\helper\update_helper;
+use phpbb\install\task_base;
+
+/**
+ * Merges user made changes into the files
+ */
+class diff_files extends task_base
+{
+	/**
+	 * @var \phpbb\cache\driver\driver_interface
+	 */
+	protected $cache;
+
+	/**
+	 * @var config
+	 */
+	protected $installer_config;
+
+	/**
+	 * @var iohandler_interface
+	 */
+	protected $iohandler;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * @var string
+	 */
+	protected $php_ext;
+
+	/**
+	 * @var update_helper
+	 */
+	protected $update_helper;
+
+	/**
+	 * Constructor
+	 *
+	 * @param container_factory		$container
+	 * @param config				$config
+	 * @param iohandler_interface	$iohandler
+	 * @param update_helper			$update_helper
+	 * @param string				$phpbb_root_path
+	 * @param string				$php_ext
+	 */
+	public function __construct(container_factory $container, config $config, iohandler_interface $iohandler, update_helper $update_helper, $phpbb_root_path, $php_ext)
+	{
+		$this->installer_config	= $config;
+		$this->iohandler		= $iohandler;
+		$this->update_helper	= $update_helper;
+		$this->phpbb_root_path	= $phpbb_root_path;
+		$this->php_ext			= $php_ext;
+
+		$this->cache			= $container->get('cache.driver');
+
+		parent::__construct(false);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function check_requirements()
+	{
+		$files_to_diff = $this->installer_config->get('update_files', array());
+		$files_to_diff = (isset($files_to_diff['update_with_diff'])) ? $files_to_diff['update_with_diff'] : array();
+
+		return $this->installer_config->get('do_update_files', false) && count($files_to_diff) > 0;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		// Include diff engine
+		$this->update_helper->include_file('includes/diff/diff.' . $this->php_ext);
+		$this->update_helper->include_file('includes/diff/engine.' . $this->php_ext);
+
+		// Set up basic vars
+		$old_path = $this->update_helper->get_path_to_old_update_files();
+		$new_path = $this->update_helper->get_path_to_new_update_files();
+
+		$update_files = $this->installer_config->get('update_files', array());
+		$files_to_diff = $update_files['update_with_diff'];
+
+		// Set progress bar
+		$this->iohandler->set_task_count(count($files_to_diff), true);
+		$this->iohandler->set_progress('UPDATE_FILE_DIFF', 0);
+		$progress_count = $this->installer_config->get('file_diff_update_count', 0);
+
+		// Recover progress
+		$progress_key = $this->installer_config->get('differ_progress_key', -1);
+		$progress_recovered = ($progress_key === -1);
+		$merge_conflicts = $this->installer_config->get('merge_conflict_list', array());
+
+		foreach ($files_to_diff as $key => $filename)
+		{
+			if ($progress_recovered === false)
+			{
+				if ($progress_key === $key)
+				{
+					$progress_recovered = true;
+				}
+
+				continue;
+			}
+
+			// Read in files' content
+			$file_contents = array();
+
+			// Handle the special case when user created a file with the filename that is now new in the core
+			if (file_exists($old_path . $filename))
+			{
+				$file_contents[0] = file_get_contents($old_path . $filename);
+
+				$filenames = array(
+					$this->phpbb_root_path . $filename,
+					$new_path . $filename
+				);
+
+				foreach ($filenames as $file_to_diff)
+				{
+					$file_contents[] = file_get_contents($file_to_diff);
+
+					if ($file_contents[count($file_contents) - 1] === false)
+					{
+						$this->iohandler->add_error_message(array('FILE_DIFFER_ERROR_FILE_CANNOT_BE_READ', $files_to_diff));
+						unset($file_contents);
+						throw new user_interaction_required_exception();
+					}
+				}
+
+				$diff = new \diff3($file_contents[0], $file_contents[1], $file_contents[2]);
+
+				// Handle conflicts
+				if ($diff->get_num_conflicts() !== 0)
+				{
+					$merge_conflicts[] = $filename;
+				}
+
+				if ($diff->merged_output() !== $file_contents[1])
+				{
+					// Save merged output
+					$this->cache->put(
+						'_file_' . md5($filename),
+						base64_encode(implode("\n", $diff->merged_output()))
+					);
+				}
+				else
+				{
+					unset($update_files['update_with_diff'][$key]);
+				}
+
+				unset($file_contents);
+				unset($diff);
+			}
+			else
+			{
+				$new_file_content = file_get_contents($new_path . $filename);
+
+				if ($new_file_content === false)
+				{
+					$this->iohandler->add_error_message(array('FILE_DIFFER_ERROR_FILE_CANNOT_BE_READ', $files_to_diff));
+					unset($new_file_content );
+					throw new user_interaction_required_exception();
+				}
+
+				// Save new file content to cache
+				$this->cache->put(
+					'_file_' . md5($filename),
+					base64_encode($new_file_content)
+				);
+				unset($new_file_content);
+			}
+
+			$progress_count++;
+			$this->iohandler->set_progress('UPDATE_FILE_DIFF', $progress_count);
+
+			if ($this->installer_config->get_time_remaining() <= 0 || $this->installer_config->get_memory_remaining() <= 0)
+			{
+				// Save differ progress
+				$this->installer_config->set('differ_progress_key', $key);
+				$this->installer_config->set('merge_conflict_list', $merge_conflicts);
+				$this->installer_config->set('file_diff_update_count', $progress_count);
+
+				foreach ($update_files as $type => $files)
+				{
+					if (empty($files))
+					{
+						unset($update_files[$type]);
+					}
+				}
+
+				$this->installer_config->set('update_files', $update_files);
+
+				// Request refresh
+				throw new resource_limit_reached_exception();
+			}
+		}
+
+		$this->iohandler->finish_progress('ALL_FILES_DIFFED');
+		$this->installer_config->set('merge_conflict_list', $merge_conflicts);
+
+		foreach ($update_files as $type => $files)
+		{
+			if (empty($files))
+			{
+				unset($update_files[$type]);
+			}
+		}
+
+		$this->installer_config->set('update_files', $update_files);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 0;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return '';
+	}
+}
diff --git a/phpBB/phpbb/install/module/update_filesystem/task/download_updated_files.php b/phpBB/phpbb/install/module/update_filesystem/task/download_updated_files.php
new file mode 100644
index 0000000000..4d7f0e0cdf
--- /dev/null
+++ b/phpBB/phpbb/install/module/update_filesystem/task/download_updated_files.php
@@ -0,0 +1,133 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\update_filesystem\task;
+
+use phpbb\filesystem\filesystem;
+use phpbb\install\exception\jump_to_restart_point_exception;
+use phpbb\install\exception\user_interaction_required_exception;
+use phpbb\install\helper\config;
+use phpbb\install\helper\iohandler\iohandler_interface;
+use phpbb\install\task_base;
+
+class download_updated_files extends task_base
+{
+	/**
+	 * @var config
+	 */
+	protected $installer_config;
+
+	/**
+	 * @var filesystem
+	 */
+	protected $filesystem;
+
+	/**
+	 * @var iohandler_interface
+	 */
+	protected $iohandler;
+
+	/**
+	 * Constructor
+	 *
+	 * @param config				$config
+	 * @param iohandler_interface	$iohandler
+	 * @param filesystem			$filesystem
+	 */
+	public function __construct(config $config, iohandler_interface $iohandler, filesystem $filesystem)
+	{
+		$this->installer_config	= $config;
+		$this->iohandler		= $iohandler;
+		$this->filesystem		= $filesystem;
+
+		parent::__construct(false);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function check_requirements()
+	{
+		return $this->installer_config->get('do_update_files', false)
+			&& $this->installer_config->get('file_update_method', '') === 'compression';
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		if ($this->iohandler->get_input('database_update_submit', false))
+		{
+			// Remove archive
+			$this->filesystem->remove(
+				$this->installer_config->get('update_file_archive', null)
+			);
+
+			$this->installer_config->set('update_file_archive', null);
+		}
+		else if ($this->iohandler->get_input('update_recheck_files_submit', false))
+		{
+			$this->installer_config->set('file_updater_elem_progress', '');
+			$this->installer_config->set('update_files', array());
+			throw new jump_to_restart_point_exception('check_update_files');
+		}
+		else
+		{
+			$file_update_info = $this->installer_config->get('update_files', array());
+
+			// Display download box only if the archive won't be empty
+			if (!empty($file_update_info) && !(isset($file_update_info['delete']) && count($file_update_info) == 1))
+			{
+				// Render download box
+				$this->iohandler->add_download_link(
+					'phpbb_installer_update_file_download',
+					'DOWNLOAD_UPDATE_METHOD',
+					'DOWNLOAD_UPDATE_METHOD_EXPLAIN'
+				);
+			}
+
+			// Add form to continue update
+			$this->iohandler->add_user_form_group('UPDATE_CONTINUE_UPDATE_PROCESS', array(
+				'update_recheck_files_submit'	=> array(
+					'label'			=> 'UPDATE_RECHECK_UPDATE_FILES',
+					'type'			=> 'submit',
+					'is_secondary'	=> empty($file_update_info),
+				),
+				'database_update_submit'	=> array(
+					'label'		=> 'UPDATE_CONTINUE_UPDATE_PROCESS',
+					'type'		=> 'submit',
+					'disabled'	=> !empty($file_update_info),
+				),
+			));
+
+			throw new user_interaction_required_exception();
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 0;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return '';
+	}
+}
diff --git a/phpBB/phpbb/install/module/update_filesystem/task/file_check.php b/phpBB/phpbb/install/module/update_filesystem/task/file_check.php
new file mode 100644
index 0000000000..9daa8530c6
--- /dev/null
+++ b/phpBB/phpbb/install/module/update_filesystem/task/file_check.php
@@ -0,0 +1,248 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\update_filesystem\task;
+
+use phpbb\filesystem\filesystem;
+use phpbb\install\exception\resource_limit_reached_exception;
+use phpbb\install\helper\config;
+use phpbb\install\helper\iohandler\iohandler_interface;
+use phpbb\install\helper\update_helper;
+use phpbb\install\task_base;
+
+/**
+ * Updater task performing file checking
+ */
+class file_check extends task_base
+{
+	/**
+	 * @var filesystem
+	 */
+	protected $filesystem;
+
+	/**
+	 * @var config
+	 */
+	protected $installer_config;
+
+	/**
+	 * @var iohandler_interface
+	 */
+	protected $iohandler;
+
+	/**
+	 * @var update_helper
+	 */
+	protected $update_helper;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * Construct
+	 *
+	 * @param filesystem			$filesystem
+	 * @param config				$config
+	 * @param iohandler_interface	$iohandler
+	 * @param update_helper			$update_helper
+	 * @param string				$phpbb_root_path
+	 */
+	public function __construct(filesystem $filesystem, config $config, iohandler_interface $iohandler, update_helper $update_helper, $phpbb_root_path)
+	{
+		$this->filesystem		= $filesystem;
+		$this->installer_config	= $config;
+		$this->iohandler		= $iohandler;
+		$this->update_helper	= $update_helper;
+		$this->phpbb_root_path	= $phpbb_root_path;
+
+		parent::__construct(false);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function check_requirements()
+	{
+		return $this->installer_config->get('do_update_files', false);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		if (!$this->installer_config->has_restart_point('check_update_files'))
+		{
+			$this->installer_config->create_progress_restart_point('check_update_files');
+		}
+
+		$old_path = $this->update_helper->get_path_to_old_update_files();
+		$new_path = $this->update_helper->get_path_to_new_update_files();
+
+		$update_info = $this->installer_config->get('update_info', array());
+		$file_update_info = $this->installer_config->get('update_files', array());
+
+		if (empty($update_info))
+		{
+			$root_path = $this->phpbb_root_path;
+
+			$update_info = $this->installer_config->get('update_info_unprocessed', array());
+
+			$file_update_info = array();
+			$file_update_info['update_without_diff'] = array_diff($update_info['binary'], $update_info['deleted']);
+
+			foreach ($file_update_info['update_without_diff'] as $key => $binary_file)
+			{
+				$new_file = $new_path . $binary_file;
+				$file = $this->phpbb_root_path . $binary_file;
+
+				if (!$this->filesystem->exists($file))
+				{
+					continue;
+				}
+
+				if (md5_file($file) === md5_file($new_file))
+				{
+					// File already up to date
+					unset($file_update_info['update_without_diff'][$key]);
+				}
+			}
+
+			// Remove update without diff info if empty
+			if (count($file_update_info['update_without_diff']) < 1)
+			{
+				unset($file_update_info['update_without_diff']);
+			}
+
+			// Filter out files that are already deleted
+			$file_update_info['delete'] = array_filter(
+				$update_info['deleted'],
+				function ($filename) use ($root_path)
+				{
+					return file_exists($root_path . $filename);
+				}
+			);
+
+			// Remove files to delete list if empty
+			if (count($file_update_info['delete']) < 1)
+			{
+				unset($file_update_info['delete']);
+			}
+		}
+
+		$progress_count = $this->installer_config->get('file_check_progress_count', 0);
+		$task_count = count($update_info['files']);
+		$this->iohandler->set_task_count($task_count);
+		$this->iohandler->set_progress('UPDATE_CHECK_FILES', 0);
+
+		// Create list of default extensions that should have been added prior
+		// to this update
+		$default_update_extensions = [];
+		foreach (\phpbb\install\module\update_database\task\update_extensions::$default_extensions_update as $version => $extensions)
+		{
+			if ($this->update_helper->phpbb_version_compare($update_info['version']['from'], $version, '>='))
+			{
+				$default_update_extensions = array_merge($default_update_extensions, $extensions);
+			}
+		}
+
+		foreach ($update_info['files'] as $key => $filename)
+		{
+			$old_file = $old_path . $filename;
+			$new_file = $new_path . $filename;
+			$file = $this->phpbb_root_path . $filename;
+
+			if ($this->installer_config->get_time_remaining() <= 0 || $this->installer_config->get_memory_remaining() <= 0)
+			{
+				// Save progress
+				$this->installer_config->set('update_info', $update_info);
+				$this->installer_config->set('file_check_progress_count', $progress_count);
+				$this->installer_config->set('update_files', $file_update_info);
+
+				// Request refresh
+				throw new resource_limit_reached_exception();
+			}
+
+			$progress_count++;
+			$this->iohandler->set_progress('UPDATE_CHECK_FILES', $progress_count);
+
+			// Do not copy default extension again if the previous version was
+			// packaged with it but it does not exist (e.g. deleted by admin)
+			if (strpos($file, $this->phpbb_root_path . 'ext/') !== false)
+			{
+				$skip_file = false;
+				foreach ($default_update_extensions as $ext_name)
+				{
+					if (strpos($file, $this->phpbb_root_path . 'ext/' . $ext_name) !== false &&
+						!$this->filesystem->exists($this->phpbb_root_path . 'ext/' . $ext_name . '/composer.json'))
+					{
+						$skip_file = true;
+						break;
+					}
+				}
+
+				if ($skip_file)
+				{
+					continue;
+				}
+			}
+
+			if (!$this->filesystem->exists($file))
+			{
+				$file_update_info['new'][] = $filename;
+			}
+			else
+			{
+				$file_checksum = md5_file($file);
+
+				if ($file_checksum === md5_file($new_file))
+				{
+					// File already up to date
+					continue;
+				}
+				else if ($this->filesystem->exists($old_file) && $file_checksum === md5_file($old_file))
+				{
+					// No need to diff the file
+					$file_update_info['update_without_diff'][] = $filename;
+				}
+				else
+				{
+					$file_update_info['update_with_diff'][] = $filename;
+				}
+			}
+
+			unset($update_info['files'][$key]);
+		}
+
+		$this->installer_config->set('update_files', $file_update_info);
+		$this->installer_config->set('update_info', array());
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 0;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return '';
+	}
+}
diff --git a/phpBB/phpbb/install/module/update_filesystem/task/show_file_status.php b/phpBB/phpbb/install/module/update_filesystem/task/show_file_status.php
new file mode 100644
index 0000000000..0e82f91553
--- /dev/null
+++ b/phpBB/phpbb/install/module/update_filesystem/task/show_file_status.php
@@ -0,0 +1,170 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\update_filesystem\task;
+
+use phpbb\filesystem\filesystem;
+use phpbb\install\exception\user_interaction_required_exception;
+use phpbb\install\helper\config;
+use phpbb\install\helper\container_factory;
+use phpbb\install\helper\file_updater\factory;
+use phpbb\install\helper\iohandler\iohandler_interface;
+use phpbb\install\task_base;
+
+class show_file_status extends task_base
+{
+	/**
+	 * @var \phpbb\cache\driver\driver_interface
+	 */
+	protected $cache;
+
+	/**
+	 * @var filesystem
+	 */
+	protected $filesystem;
+
+	/**
+	 * @var config
+	 */
+	protected $installer_config;
+
+	/**
+	 * @var iohandler_interface
+	 */
+	protected $iohandler;
+
+	/**
+	 * @var \phpbb\install\helper\file_updater\compression_file_updater
+	 */
+	protected $file_updater;
+
+	/**
+	 * Constructor
+	 *
+	 * @param container_factory		$container
+	 * @param config				$config
+	 * @param iohandler_interface	$iohandler
+	 * @param filesystem			$filesystem
+	 * @param factory				$file_updater_factory
+	 */
+	public function __construct(container_factory $container, config $config, iohandler_interface $iohandler, filesystem $filesystem, factory $file_updater_factory)
+	{
+		$this->installer_config	= $config;
+		$this->iohandler		= $iohandler;
+		$this->filesystem		= $filesystem;
+
+		$this->cache = $container->get('cache.driver');
+
+		// Initialize compression file updater
+		$this->file_updater = $file_updater_factory->get('compression');
+
+		parent::__construct(false);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function check_requirements()
+	{
+		return $this->installer_config->get('do_update_files', false);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		if (!$this->iohandler->get_input('submit_continue_file_update', false))
+		{
+			// Handle merge conflicts
+			$merge_conflicts = $this->installer_config->get('merge_conflict_list', array());
+
+			// Create archive for merge conflicts
+			if (!empty($merge_conflicts))
+			{
+				$compression_method = $this->installer_config->get('file_update_compression', '');
+				$conflict_archive = $this->file_updater->init($compression_method);
+				$this->installer_config->set('update_file_conflict_archive', $conflict_archive);
+
+				foreach ($merge_conflicts as $filename)
+				{
+					$this->file_updater->create_new_file(
+						$filename,
+						base64_decode($this->cache->get('_file_' . md5($filename))),
+						true
+					);
+				}
+
+				// Render download box
+				$this->iohandler->add_download_link(
+					'phpbb_installer_update_conflict_download',
+					'DOWNLOAD_CONFLICTS',
+					'DOWNLOAD_CONFLICTS_EXPLAIN'
+				);
+
+				$this->file_updater->close();
+			}
+
+			// Render update file statuses
+			$file_update_info = $this->installer_config->get('update_files', array());
+			$file_status = array(
+				'deleted'		=> (!isset($file_update_info['delete'])) ? array() : $file_update_info['delete'],
+				'new'			=> (!isset($file_update_info['new'])) ? array() : $file_update_info['new'],
+				'conflict'		=> $this->installer_config->get('merge_conflict_list', array()),
+				'modified'		=> (!isset($file_update_info['update_with_diff'])) ? array() : $file_update_info['update_with_diff'],
+				'not_modified'	=> (!isset($file_update_info['update_without_diff'])) ? array() : $file_update_info['update_without_diff'],
+			);
+
+			$this->iohandler->render_update_file_status($file_status);
+
+			// Add form to continue update
+			$this->iohandler->add_user_form_group('UPDATE_CONTINUE_FILE_UPDATE', array(
+				'submit_continue_file_update' => array(
+					'label' => 'UPDATE_CONTINUE_FILE_UPDATE',
+					'type' => 'submit',
+				),
+			));
+
+			// Show results to the user
+			throw new user_interaction_required_exception();
+		}
+		else
+		{
+			$conflict_archive_path = $this->installer_config->get('update_file_conflict_archive', null);
+
+			// Remove archive
+			if ($conflict_archive_path !== null && $this->filesystem->exists($conflict_archive_path))
+			{
+				$this->filesystem->remove($conflict_archive_path);
+			}
+
+			$this->installer_config->set('update_file_conflict_archive', null);
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 0;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return '';
+	}
+}
diff --git a/phpBB/phpbb/install/module/update_filesystem/task/update_files.php b/phpBB/phpbb/install/module/update_filesystem/task/update_files.php
new file mode 100644
index 0000000000..fbb465cc66
--- /dev/null
+++ b/phpBB/phpbb/install/module/update_filesystem/task/update_files.php
@@ -0,0 +1,294 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\update_filesystem\task;
+
+use phpbb\exception\runtime_exception;
+use phpbb\install\exception\resource_limit_reached_exception;
+use phpbb\install\helper\config;
+use phpbb\install\helper\container_factory;
+use phpbb\install\helper\file_updater\factory;
+use phpbb\install\helper\file_updater\file_updater_interface;
+use phpbb\install\helper\iohandler\iohandler_interface;
+use phpbb\install\helper\update_helper;
+use phpbb\install\task_base;
+
+/**
+ * File updater task
+ */
+class update_files extends task_base
+{
+	/**
+	 * @var \phpbb\cache\driver\driver_interface
+	 */
+	protected $cache;
+
+	/**
+	 * @var config
+	 */
+	protected $installer_config;
+
+	/**
+	 * @var iohandler_interface
+	 */
+	protected $iohandler;
+
+	/**
+	 * @var factory
+	 */
+	protected $factory;
+
+	/**
+	 * @var file_updater_interface
+	 */
+	protected $file_updater;
+
+	/**
+	 * @var update_helper
+	 */
+	protected $update_helper;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * Constructor
+	 *
+	 * @param container_factory		$container
+	 * @param config				$config
+	 * @param iohandler_interface	$iohandler
+	 * @param factory				$file_updater_factory
+	 * @param update_helper			$update_helper
+	 * @param string				$phpbb_root_path
+	 */
+	public function __construct(container_factory $container, config $config, iohandler_interface $iohandler, factory $file_updater_factory, update_helper $update_helper, $phpbb_root_path)
+	{
+		$this->factory			= $file_updater_factory;
+		$this->installer_config	= $config;
+		$this->iohandler		= $iohandler;
+		$this->update_helper	= $update_helper;
+		$this->phpbb_root_path	= $phpbb_root_path;
+
+		$this->cache			= $container->get('cache.driver');
+		$this->file_updater		= null;
+
+		parent::__construct(false);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function check_requirements()
+	{
+		return $this->installer_config->get('do_update_files', false);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		$new_path = $this->update_helper->get_path_to_new_update_files();
+
+		$file_update_info = $this->installer_config->get('update_files', array());
+
+		$update_type_progress = $this->installer_config->get('file_updater_type_progress', '');
+		$update_elem_progress = $this->installer_config->get('file_updater_elem_progress', '');
+		$type_progress_found = false;
+		$elem_progress_found = false;
+
+		// Progress bar
+		$task_count = 0;
+		foreach ($file_update_info as $sub_array)
+		{
+			$task_count += count($sub_array);
+		}
+
+		// Everything is up to date, so just continue
+		if ($task_count === 0)
+		{
+			return;
+		}
+
+		$progress_count = $this->installer_config->get('file_update_progress_count', 0);
+		$this->iohandler->set_task_count($task_count, true);
+		$this->iohandler->set_progress('UPDATE_UPDATING_FILES', 0);
+
+		$this->file_updater = $this->get_file_updater();
+
+		// File updater fallback logic
+		try
+		{
+			// Update files
+			foreach ($file_update_info as $type => $file_update_vector)
+			{
+				if (!$type_progress_found)
+				{
+					if ($type === $update_type_progress || empty($update_elem_progress))
+					{
+						$type_progress_found = true;
+					}
+					else
+					{
+						continue;
+					}
+				}
+
+				foreach ($file_update_vector as $path)
+				{
+					if (!$elem_progress_found)
+					{
+						if ($path === $update_elem_progress || empty($update_elem_progress))
+						{
+							$elem_progress_found = true;
+						}
+						else
+						{
+							continue;
+						}
+					}
+
+					switch ($type)
+					{
+						case 'delete':
+							$this->file_updater->delete_file($path);
+						break;
+						case 'new':
+							$this->file_updater->create_new_file($path, $new_path . $path);
+						break;
+						case 'update_without_diff':
+							$this->file_updater->update_file($path, $new_path . $path);
+						break;
+						case 'update_with_diff':
+							$this->file_updater->update_file(
+								$path,
+								base64_decode($this->cache->get('_file_' . md5($path))),
+								true
+							);
+						break;
+					}
+
+					// Save progress
+					$this->installer_config->set('file_updater_type_progress', $type);
+					$this->installer_config->set('file_updater_elem_progress', $path);
+					$progress_count++;
+					$this->iohandler->set_progress('UPDATE_UPDATING_FILES', $progress_count);
+
+					if ($this->installer_config->get_time_remaining() <= 0 || $this->installer_config->get_memory_remaining() <= 0)
+					{
+						// Request refresh
+						throw new resource_limit_reached_exception();
+					}
+				}
+			}
+
+			$this->iohandler->finish_progress('UPDATE_UPDATING_FILES');
+		}
+		catch (runtime_exception $e)
+		{
+			if ($e instanceof resource_limit_reached_exception)
+			{
+				throw new resource_limit_reached_exception();
+			}
+
+			$current_method = $this->installer_config->get('file_update_method', '');
+
+			// File updater failed, try to fallback to download file update mode
+			if ($current_method !== 'compression')
+			{
+				$this->iohandler->add_warning_message(array(
+					'UPDATE_FILE_UPDATER_HAS_FAILED',
+					$current_method,
+					'compression'
+				));
+				$this->installer_config->set('file_update_method', 'compression');
+
+				// We only want a simple refresh here
+				throw new resource_limit_reached_exception();
+			}
+			else
+			{
+				// Nowhere to fallback to :(
+				// Due to the way the installer handles fatal errors, we need to throw a low level exception
+				throw new runtime_exception('UPDATE_FILE_UPDATERS_HAVE_FAILED');
+			}
+		}
+
+		$file_updater_method = $this->installer_config->get('file_update_method', '');
+		if ($file_updater_method === 'compression' || $file_updater_method === 'ftp')
+		{
+			$this->file_updater->close();
+		}
+	}
+
+	/**
+	 * Get file updater
+	 *
+	 * @param null|string	$file_updater_method	Name of the file updater to use
+	 *
+	 * @return file_updater_interface	File updater
+	 */
+	protected function get_file_updater($file_updater_method = null)
+	{
+		$file_updater_method = ($file_updater_method === null) ? $this->installer_config->get('file_update_method', '') : $file_updater_method;
+
+		if ($file_updater_method === 'compression')
+		{
+			$compression_method = $this->installer_config->get('file_update_compression', '');
+
+			/** @var \phpbb\install\helper\file_updater\compression_file_updater $file_updater */
+			$file_updater = $this->factory->get('compression');
+			$archive_path = $file_updater->init($compression_method);
+			$this->installer_config->set('update_file_archive', $archive_path);
+		}
+		else if ($file_updater_method === 'ftp')
+		{
+			/** @var \phpbb\install\helper\file_updater\ftp_file_updater $file_updater */
+			$file_updater = $this->factory->get('ftp');
+			$file_updater->init(
+				$this->installer_config->get('ftp_method', ''),
+				$this->installer_config->get('ftp_host', ''),
+				$this->installer_config->get('ftp_user', ''),
+				$this->installer_config->get('ftp_pass', ''),
+				$this->installer_config->get('ftp_path', ''),
+				$this->installer_config->get('ftp_port', 0),
+				$this->installer_config->get('ftp_timeout', 10)
+			);
+		}
+		else
+		{
+			/** @var file_updater_interface $file_updater */
+			$file_updater = $this->factory->get('direct_file');
+		}
+
+		return $file_updater;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 0;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return '';
+	}
+}
diff --git a/phpBB/phpbb/install/module_base.php b/phpBB/phpbb/install/module_base.php
new file mode 100644
index 0000000000..93c10bd656
--- /dev/null
+++ b/phpBB/phpbb/install/module_base.php
@@ -0,0 +1,213 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install;
+
+use phpbb\di\ordered_service_collection;
+use phpbb\install\exception\resource_limit_reached_exception;
+use phpbb\install\helper\config;
+use phpbb\install\helper\iohandler\iohandler_interface;
+
+/**
+ * Base class for installer module
+ */
+abstract class module_base implements module_interface
+{
+	/**
+	 * @var config
+	 */
+	protected $install_config;
+
+	/**
+	 * @var iohandler_interface
+	 */
+	protected $iohandler;
+
+	/**
+	 * @var bool
+	 */
+	protected $is_essential;
+
+	/**
+	 * Array of tasks for installer module
+	 *
+	 * @var ordered_service_collection
+	 */
+	protected $task_collection;
+
+	/**
+	 * @var array
+	 */
+	protected $task_step_count;
+
+	/**
+	 * @var bool
+	 */
+	protected $allow_progress_bar;
+
+	/**
+	 * Installer module constructor
+	 *
+	 * @param ordered_service_collection	$tasks				array of installer tasks for installer module
+	 * @param bool							$essential			flag indicating whether the module is essential or not
+	 * @param bool							$allow_progress_bar	flag indicating whether or not to send progress information from within the module
+	 */
+	public function __construct(ordered_service_collection $tasks, $essential = true, $allow_progress_bar = true)
+	{
+		$this->task_collection		= $tasks;
+		$this->is_essential			= $essential;
+		$this->allow_progress_bar	= $allow_progress_bar;
+	}
+
+	/**
+	 * Dependency getter
+	 *
+	 * @param config				$config
+	 * @param iohandler_interface	$iohandler
+	 */
+	public function setup(config $config, iohandler_interface $iohandler)
+	{
+		$this->install_config	= $config;
+		$this->iohandler		= $iohandler;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function is_essential()
+	{
+		return $this->is_essential;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 *
+	 * Overwrite this method if your task is non-essential!
+	 */
+	public function check_requirements()
+	{
+		return true;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		// Recover install progress
+		$task_index	= $this->recover_progress();
+		$iterator	= $this->task_collection->getIterator();
+
+		if ($task_index < $iterator->count())
+		{
+			$iterator->seek($task_index);
+		}
+		else
+		{
+			$this->install_config->set_finished_task(0);
+			return;
+		}
+
+		while ($iterator->valid())
+		{
+			$task = $iterator->current();
+			$name = $iterator->key();
+
+			// Check if we can run the task
+			if (!$task->is_essential() && !$task->check_requirements())
+			{
+				$this->iohandler->add_log_message(array(
+					'SKIP_TASK',
+					$name,
+				));
+
+				$this->install_config->increment_current_task_progress($this->task_step_count[$name]);
+			}
+			else
+			{
+				// Send progress information
+				if ($this->allow_progress_bar)
+				{
+					$this->iohandler->set_progress(
+						$task->get_task_lang_name(),
+						$this->install_config->get_current_task_progress()
+					);
+
+					$this->iohandler->send_response();
+				}
+
+				$task->run();
+
+				if ($this->allow_progress_bar)
+				{
+					// Only increment progress by one, as if a task has more than one steps
+					// then that should be incremented in the task itself
+					$this->install_config->increment_current_task_progress();
+				}
+			}
+
+			$task_index++;
+			$this->install_config->set_finished_task($task_index);
+			$iterator->next();
+
+			// Send progress information
+			if ($this->allow_progress_bar)
+			{
+				$this->iohandler->set_progress(
+					$task->get_task_lang_name(),
+					$this->install_config->get_current_task_progress()
+				);
+			}
+
+			$this->iohandler->send_response();
+
+			// Stop execution if resource limit is reached
+			if ($iterator->valid() && ($this->install_config->get_time_remaining() <= 0 || $this->install_config->get_memory_remaining() <= 0))
+			{
+				throw new resource_limit_reached_exception();
+			}
+		}
+
+		// Module finished, so clear task progress
+		$this->install_config->set_finished_task(0);
+	}
+
+	/**
+	 * Returns the next task's name
+	 *
+	 * @return string	Index of the array element of the next task
+	 */
+	protected function recover_progress()
+	{
+		$progress_array = $this->install_config->get_progress_data();
+		return $progress_array['last_task_index'];
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_step_count()
+	{
+		$task_step_count = 0;
+		$task_class_names = $this->task_collection->get_service_classes();
+
+		foreach ($task_class_names as $name => $task_class)
+		{
+			$step_count = $task_class::get_step_count();
+			$task_step_count += $step_count;
+			$this->task_step_count[$name] = $step_count;
+		}
+
+		return $task_step_count;
+	}
+}
diff --git a/phpBB/phpbb/install/module_interface.php b/phpBB/phpbb/install/module_interface.php
new file mode 100644
index 0000000000..a2d61e3958
--- /dev/null
+++ b/phpBB/phpbb/install/module_interface.php
@@ -0,0 +1,63 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install;
+
+/**
+ * Interface for installer modules
+ *
+ * An installer module is a task collection which executes installer tasks.
+ */
+interface module_interface
+{
+	/**
+	 * Checks if the execution of the module is essential to install phpBB or it can be skipped
+	 *
+	 * Note: Please note that all the non-essential modules have to implement check_requirements()
+	 * method.
+	 *
+	 * @return	bool	true if the module is essential, false otherwise
+	 */
+	public function is_essential();
+
+	/**
+	 * Checks requirements for the tasks
+	 *
+	 * Note: Only need to be implemented for non-essential tasks, as essential tasks
+	 * requirements should be checked in the requirements install module.
+	 *
+	 * @return bool	true if the task's requirements are met
+	 */
+	public function check_requirements();
+
+	/**
+	 * Executes the task
+	 *
+	 * @return	null
+	 */
+	public function run();
+
+	/**
+	 * Returns the number of tasks in the module
+	 *
+	 * @return int
+	 */
+	public function get_step_count();
+
+	/**
+	 * Returns an array to the correct navigation stage
+	 *
+	 * @return array
+	 */
+	public function get_navigation_stage_path();
+}
diff --git a/phpBB/phpbb/install/task_base.php b/phpBB/phpbb/install/task_base.php
new file mode 100644
index 0000000000..b5199be4af
--- /dev/null
+++ b/phpBB/phpbb/install/task_base.php
@@ -0,0 +1,53 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install;
+
+/**
+ * Base class for installer task
+ */
+abstract class task_base implements task_interface
+{
+	/**
+	 * @var bool
+	 */
+	protected $is_essential;
+
+	/**
+	 * Constructor
+	 *
+	 * @param bool $essential
+	 */
+	public function __construct($essential = true)
+	{
+		$this->is_essential = $essential;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function is_essential()
+	{
+		return $this->is_essential;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 *
+	 * Note: Overwrite this method if your task is non-essential!
+	 */
+	public function check_requirements()
+	{
+		return true;
+	}
+}
diff --git a/phpBB/phpbb/install/task_interface.php b/phpBB/phpbb/install/task_interface.php
new file mode 100644
index 0000000000..794cb16482
--- /dev/null
+++ b/phpBB/phpbb/install/task_interface.php
@@ -0,0 +1,61 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install;
+
+/**
+ * Interface for installer tasks
+ */
+interface task_interface
+{
+	/**
+	 * Returns the number of steps the task contains
+	 *
+	 * This is a helper method to provide a better progress bar for the front-end.
+	 *
+	 * @return int	The number of steps that the task contains
+	 */
+	static public function get_step_count();
+
+	/**
+	 * Checks if the task is essential to install phpBB or it can be skipped
+	 *
+	 * Note: Please note that all the non-essential modules have to implement check_requirements()
+	 * method.
+	 *
+	 * @return	bool	true if the task is essential, false otherwise
+	 */
+	public function is_essential();
+
+	/**
+	 * Checks requirements for the tasks
+	 *
+	 * Note: Only need to be implemented for non-essential tasks, as essential tasks
+	 * requirements should be checked in the requirements install module.
+	 *
+	 * @return bool	true if the task's requirements are met
+	 */
+	public function check_requirements();
+
+	/**
+	 * Executes the task
+	 */
+	public function run();
+
+	/**
+	 * Returns the language key of the name of the task
+	 *
+	 * @return string
+	 */
+	public function get_task_lang_name();
+}
diff --git a/phpBB/phpbb/install/updater_configuration.php b/phpBB/phpbb/install/updater_configuration.php
new file mode 100644
index 0000000000..5c1c29f1da
--- /dev/null
+++ b/phpBB/phpbb/install/updater_configuration.php
@@ -0,0 +1,44 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\install;
+
+use Symfony\Component\Config\Definition\Builder\TreeBuilder;
+use Symfony\Component\Config\Definition\ConfigurationInterface;
+
+class updater_configuration implements ConfigurationInterface
+{
+
+	/**
+	 * Generates the configuration tree builder.
+	 *
+	 * @return \Symfony\Component\Config\Definition\Builder\TreeBuilder The tree builder
+	 */
+	public function getConfigTreeBuilder()
+	{
+		$treeBuilder = new TreeBuilder();
+		$rootNode = $treeBuilder->root('updater');
+		$rootNode
+			->addDefaultsIfNotSet()
+			->children()
+				->enumNode('type')->values(['all','db_only'])->defaultValue('all')->end()
+				->arrayNode('extensions')
+					->prototype('scalar')->end()
+					->defaultValue([])
+				->end()
+			->end()
+		;
+
+		return $treeBuilder;
+	}
+}
diff --git a/phpBB/phpbb/language/exception/invalid_plural_rule_exception.php b/phpBB/phpbb/language/exception/invalid_plural_rule_exception.php
new file mode 100644
index 0000000000..94e3466208
--- /dev/null
+++ b/phpBB/phpbb/language/exception/invalid_plural_rule_exception.php
@@ -0,0 +1,22 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\language\exception;
+
+/**
+ * Thrown when nonexistent plural rule is specified
+ */
+class invalid_plural_rule_exception extends language_exception
+{
+
+}
diff --git a/phpBB/phpbb/language/exception/language_exception.php b/phpBB/phpbb/language/exception/language_exception.php
new file mode 100644
index 0000000000..b1258414aa
--- /dev/null
+++ b/phpBB/phpbb/language/exception/language_exception.php
@@ -0,0 +1,22 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\language\exception;
+
+/**
+ * Base exception class for language exceptions
+ */
+class language_exception extends \phpbb\exception\runtime_exception
+{
+
+}
diff --git a/phpBB/phpbb/language/exception/language_file_not_found.php b/phpBB/phpbb/language/exception/language_file_not_found.php
new file mode 100644
index 0000000000..89364267eb
--- /dev/null
+++ b/phpBB/phpbb/language/exception/language_file_not_found.php
@@ -0,0 +1,22 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\language\exception;
+
+/**
+ * This exception is thrown when the language file is not found
+ */
+class language_file_not_found extends language_exception
+{
+
+}
diff --git a/phpBB/phpbb/language/language.php b/phpBB/phpbb/language/language.php
new file mode 100644
index 0000000000..51e6d0b185
--- /dev/null
+++ b/phpBB/phpbb/language/language.php
@@ -0,0 +1,673 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\language;
+
+use phpbb\language\exception\invalid_plural_rule_exception;
+
+/**
+ * Wrapper class for loading translations
+ */
+class language
+{
+	/**
+	 * Global fallback language
+	 *
+	 * ISO code of the language to fallback to when the specified language entries
+	 * cannot be found.
+	 *
+	 * @var string
+	 */
+	const FALLBACK_LANGUAGE = 'en';
+
+	/**
+	 * @var array	List of common language files
+	 */
+	protected $common_language_files;
+
+	/**
+	 * @var bool
+	 */
+	protected $common_language_files_loaded;
+
+	/**
+	 * @var string	ISO code of the default board language
+	 */
+	protected $default_language;
+
+	/**
+	 * @var string	ISO code of the User's language
+	 */
+	protected $user_language;
+
+	/**
+	 * @var array	Language fallback array (the order is important)
+	 */
+	protected $language_fallback;
+
+	/**
+	 * @var array	Array of language variables
+	 */
+	protected $lang;
+
+	/**
+	 * @var array	Loaded language sets
+	 */
+	protected $loaded_language_sets;
+
+	/**
+	 * @var \phpbb\language\language_file_loader Language file loader
+	 */
+	protected $loader;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\language\language_file_loader	$loader			Language file loader
+	 * @param array|null							$common_modules	Array of common language modules to load (optional)
+	 */
+	public function __construct(language_file_loader $loader, $common_modules = null)
+	{
+		$this->loader = $loader;
+
+		// Set up default information
+		$this->user_language		= false;
+		$this->default_language		= false;
+		$this->lang					= array();
+		$this->loaded_language_sets	= array(
+			'core'	=> array(),
+			'ext'	=> array(),
+		);
+
+		// Common language files
+		if (is_array($common_modules))
+		{
+			$this->common_language_files = $common_modules;
+		}
+		else
+		{
+			$this->common_language_files = array(
+				'common',
+			);
+		}
+
+		$this->common_language_files_loaded = false;
+
+		$this->language_fallback = array(self::FALLBACK_LANGUAGE);
+	}
+
+	/**
+	 * Function to set user's language to display.
+	 *
+	 * @param string	$user_lang_iso		ISO code of the User's language
+	 * @param bool		$reload				Whether or not to reload language files
+	 */
+	public function set_user_language($user_lang_iso, $reload = false)
+	{
+		$this->user_language = $user_lang_iso;
+
+		$this->set_fallback_array($reload);
+	}
+
+	/**
+	 * Function to set the board's default language to display.
+	 *
+	 * @param string	$default_lang_iso	ISO code of the board's default language
+	 * @param bool		$reload				Whether or not to reload language files
+	 */
+	public function set_default_language($default_lang_iso, $reload = false)
+	{
+		$this->default_language = $default_lang_iso;
+
+		$this->set_fallback_array($reload);
+	}
+
+	/**
+	 * Returns language array
+	 *
+	 * Note: This function is needed for the BC purposes, until \phpbb\user::lang[] is
+	 *       not removed.
+	 *
+	 * @return array	Array of loaded language strings
+	 */
+	public function get_lang_array()
+	{
+		// Load common language files if they not loaded yet
+		if (!$this->common_language_files_loaded)
+		{
+			$this->load_common_language_files();
+		}
+
+		return $this->lang;
+	}
+
+	/**
+	 * Add Language Items
+	 *
+	 * Examples:
+	 * <code>
+	 * $component = array('posting');
+	 * $component = array('posting', 'viewtopic')
+	 * $component = 'posting'
+	 * </code>
+	 *
+	 * @param string|array	$component		The name of the language component to load
+	 * @param string|null	$extension_name	Name of the extension to load component from, or null for core file
+	 */
+	public function add_lang($component, $extension_name = null)
+	{
+		// Load common language files if they not loaded yet
+		// This needs to be here to correctly merge language arrays
+		if (!$this->common_language_files_loaded)
+		{
+			$this->load_common_language_files();
+		}
+
+		if (!is_array($component))
+		{
+			if (!is_null($extension_name))
+			{
+				$this->load_extension($extension_name, $component);
+			}
+			else
+			{
+				$this->load_core_file($component);
+			}
+		}
+		else
+		{
+			foreach ($component as $lang_file)
+			{
+				$this->add_lang($lang_file, $extension_name);
+			}
+		}
+	}
+
+	/**
+	 * @param $key array|string		The language key we want to know more about. Can be string or array.
+	 *
+	 * @return bool		Returns whether the language key is set.
+	 */
+	public function is_set($key)
+	{
+		// Load common language files if they not loaded yet
+		if (!$this->common_language_files_loaded)
+		{
+			$this->load_common_language_files();
+		}
+
+		if (is_array($key))
+		{
+			$lang = &$this->lang[array_shift($key)];
+
+			foreach ($key as $_key)
+			{
+				$lang = &$lang[$_key];
+			}
+		}
+		else
+		{
+			$lang = &$this->lang[$key];
+		}
+
+		return isset($lang);
+	}
+
+	/**
+	 * Advanced language substitution
+	 *
+	 * Function to mimic sprintf() with the possibility of using phpBB's language system to substitute nullar/singular/plural forms.
+	 * Params are the language key and the parameters to be substituted.
+	 * This function/functionality is inspired by SHS` and Ashe.
+	 *
+	 * Example call: <samp>$user->lang('NUM_POSTS_IN_QUEUE', 1);</samp>
+	 *
+	 * If the first parameter is an array, the elements are used as keys and subkeys to get the language entry:
+	 * Example: <samp>$user->lang(array('datetime', 'AGO'), 1)</samp> uses $user->lang['datetime']['AGO'] as language entry.
+	 *
+	 * @return string	Return localized string or the language key if the translation is not available
+	 */
+	public function lang()
+	{
+		$args = func_get_args();
+		$key = array_shift($args);
+
+		return $this->lang_array($key, $args);
+	}
+
+	/**
+	 * Returns the raw value associated to a language key or the language key no translation is available.
+	 * No parameter substitution is performed, can be a string or an array.
+	 *
+	 * @param string|array	$key	Language key
+	 *
+	 * @return array|string
+	 */
+	public function lang_raw($key)
+	{
+		// Load common language files if they not loaded yet
+		if (!$this->common_language_files_loaded)
+		{
+			$this->load_common_language_files();
+		}
+
+		if (is_array($key))
+		{
+			$lang = &$this->lang[array_shift($key)];
+
+			foreach ($key as $_key)
+			{
+				$lang = &$lang[$_key];
+			}
+		}
+		else
+		{
+			$lang = &$this->lang[$key];
+		}
+
+		// Return if language string does not exist
+		if (!isset($lang) || (!is_string($lang) && !is_array($lang)))
+		{
+			return $key;
+		}
+
+		return $lang;
+	}
+
+	/**
+	 * Act like lang() but takes a key and an array of parameters instead of using variadic
+	 *
+	 * @param string|array	$key	Language key
+	 * @param array			$args	Parameters
+	 *
+	 * @return string
+	 */
+	public function lang_array($key, $args = array())
+	{
+		$lang = $this->lang_raw($key);
+
+		if ($lang === $key)
+		{
+			return $key;
+		}
+
+		// If the language entry is a string, we simply mimic sprintf() behaviour
+		if (is_string($lang))
+		{
+			if (count($args) === 0)
+			{
+				return $lang;
+			}
+
+			// Replace key with language entry and simply pass along...
+			return vsprintf($lang, $args);
+		}
+		else if (count($lang) == 0)
+		{
+			// If the language entry is an empty array, we just return the language key
+			return $key;
+		}
+
+		// It is an array... now handle different nullar/singular/plural forms
+		$key_found = false;
+
+		// We now get the first number passed and will select the key based upon this number
+		for ($i = 0, $num_args = count($args); $i < $num_args; $i++)
+		{
+			if (is_int($args[$i]) || is_float($args[$i]))
+			{
+				if ($args[$i] == 0 && isset($lang[0]))
+				{
+					// We allow each translation using plural forms to specify a version for the case of 0 things,
+					// so that "0 users" may be displayed as "No users".
+					$key_found = 0;
+					break;
+				}
+				else
+				{
+					$use_plural_form = $this->get_plural_form($args[$i]);
+					if (isset($lang[$use_plural_form]))
+					{
+						// The key we should use exists, so we use it.
+						$key_found = $use_plural_form;
+					}
+					else
+					{
+						// If the key we need to use does not exist, we fall back to the previous one.
+						$numbers = array_keys($lang);
+
+						foreach ($numbers as $num)
+						{
+							if ($num > $use_plural_form)
+							{
+								break;
+							}
+
+							$key_found = $num;
+						}
+					}
+					break;
+				}
+			}
+		}
+
+		// Ok, let's check if the key was found, else use the last entry (because it is mostly the plural form)
+		if ($key_found === false)
+		{
+			$numbers = array_keys($lang);
+			$key_found = end($numbers);
+		}
+
+		// Use the language string we determined and pass it to sprintf()
+		return vsprintf($lang[$key_found], $args);
+	}
+
+	/**
+	 * Loads common language files
+	 */
+	protected function load_common_language_files()
+	{
+		if (!$this->common_language_files_loaded)
+		{
+			foreach ($this->common_language_files as $lang_file)
+			{
+				$this->load_core_file($lang_file);
+			}
+
+			$this->common_language_files_loaded = true;
+		}
+	}
+
+	/**
+	 * Determine which plural form we should use.
+	 *
+	 * For some languages this is not as simple as for English.
+	 *
+	 * @param int|float		$number		The number we want to get the plural case for. Float numbers are floored.
+	 * @param int|bool		$force_rule	False to use the plural rule of the language package
+	 *									or an integer to force a certain plural rule
+	 *
+	 * @return int	The plural-case we need to use for the number plural-rule combination
+	 *
+	 * @throws \phpbb\language\exception\invalid_plural_rule_exception	When $force_rule has an invalid value
+	 */
+	public function get_plural_form($number, $force_rule = false)
+	{
+		$number			= (int) $number;
+		$plural_rule	= ($force_rule !== false) ? $force_rule : ((isset($this->lang['PLURAL_RULE'])) ? $this->lang['PLURAL_RULE'] : 1);
+
+		if ($plural_rule > 15 || $plural_rule < 0)
+		{
+			throw new invalid_plural_rule_exception('INVALID_PLURAL_RULE', array(
+				'plural_rule' => $plural_rule,
+			));
+		}
+
+		/**
+		 * The following plural rules are based on a list published by the Mozilla Developer Network
+		 * https://developer.mozilla.org/en/Localization_and_Plurals
+		 */
+		switch ($plural_rule)
+		{
+			case 0:
+				/**
+				 * Families: Asian (Chinese, Japanese, Korean, Vietnamese), Persian, Turkic/Altaic (Turkish), Thai, Lao
+				 * 1 - everything: 0, 1, 2, ...
+				 */
+				return 1;
+
+			case 1:
+				/**
+				 * Families: Germanic (Danish, Dutch, English, Faroese, Frisian, German, Norwegian, Swedish), Finno-Ugric (Estonian, Finnish, Hungarian), Language isolate (Basque), Latin/Greek (Greek), Semitic (Hebrew), Romanic (Italian, Portuguese, Spanish, Catalan)
+				 * 1 - 1
+				 * 2 - everything else: 0, 2, 3, ...
+				 */
+				return ($number === 1) ? 1 : 2;
+
+			case 2:
+				/**
+				 * Families: Romanic (French, Brazilian Portuguese)
+				 * 1 - 0, 1
+				 * 2 - everything else: 2, 3, ...
+				 */
+				return (($number === 0) || ($number === 1)) ? 1 : 2;
+
+			case 3:
+				/**
+				 * Families: Baltic (Latvian)
+				 * 1 - 0
+				 * 2 - ends in 1, not 11: 1, 21, ... 101, 121, ...
+				 * 3 - everything else: 2, 3, ... 10, 11, 12, ... 20, 22, ...
+				 */
+				return ($number === 0) ? 1 : ((($number % 10 === 1) && ($number % 100 != 11)) ? 2 : 3);
+
+			case 4:
+				/**
+				 * Families: Celtic (Scottish Gaelic)
+				 * 1 - is 1 or 11: 1, 11
+				 * 2 - is 2 or 12: 2, 12
+				 * 3 - others between 3 and 19: 3, 4, ... 10, 13, ... 18, 19
+				 * 4 - everything else: 0, 20, 21, ...
+				 */
+				return ($number === 1 || $number === 11) ? 1 : (($number === 2 || $number === 12) ? 2 : (($number >= 3 && $number <= 19) ? 3 : 4));
+
+			case 5:
+				/**
+				 * Families: Romanic (Romanian)
+				 * 1 - 1
+				 * 2 - is 0 or ends in 01-19: 0, 2, 3, ... 19, 101, 102, ... 119, 201, ...
+				 * 3 - everything else: 20, 21, ...
+				 */
+				return ($number === 1) ? 1 : ((($number === 0) || (($number % 100 > 0) && ($number % 100 < 20))) ? 2 : 3);
+
+			case 6:
+				/**
+				 * Families: Baltic (Lithuanian)
+				 * 1 - ends in 1, not 11: 1, 21, 31, ... 101, 121, ...
+				 * 2 - ends in 0 or ends in 10-20: 0, 10, 11, 12, ... 19, 20, 30, 40, ...
+				 * 3 - everything else: 2, 3, ... 8, 9, 22, 23, ... 29, 32, 33, ...
+				 */
+				return (($number % 10 === 1) && ($number % 100 != 11)) ? 1 : ((($number % 10 < 2) || (($number % 100 >= 10) && ($number % 100 < 20))) ? 2 : 3);
+
+			case 7:
+				/**
+				 * Families: Slavic (Croatian, Serbian, Russian, Ukrainian)
+				 * 1 - ends in 1, not 11: 1, 21, 31, ... 101, 121, ...
+				 * 2 - ends in 2-4, not 12-14: 2, 3, 4, 22, 23, 24, 32, ...
+				 * 3 - everything else: 0, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 25, 26, ...
+				 */
+				return (($number % 10 === 1) && ($number % 100 != 11)) ? 1 : ((($number % 10 >= 2) && ($number % 10 <= 4) && (($number % 100 < 10) || ($number % 100 >= 20))) ? 2 : 3);
+
+			case 8:
+				/**
+				 * Families: Slavic (Slovak, Czech)
+				 * 1 - 1
+				 * 2 - 2, 3, 4
+				 * 3 - everything else: 0, 5, 6, 7, ...
+				 */
+				return ($number === 1) ? 1 : ((($number >= 2) && ($number <= 4)) ? 2 : 3);
+
+			case 9:
+				/**
+				 * Families: Slavic (Polish)
+				 * 1 - 1
+				 * 2 - ends in 2-4, not 12-14: 2, 3, 4, 22, 23, 24, 32, ... 104, 122, ...
+				 * 3 - everything else: 0, 5, 6, ... 11, 12, 13, 14, 15, ... 20, 21, 25, ...
+				 */
+				return ($number === 1) ? 1 : ((($number % 10 >= 2) && ($number % 10 <= 4) && (($number % 100 < 12) || ($number % 100 > 14))) ? 2 : 3);
+
+			case 10:
+				/**
+				 * Families: Slavic (Slovenian, Sorbian)
+				 * 1 - ends in 01: 1, 101, 201, ...
+				 * 2 - ends in 02: 2, 102, 202, ...
+				 * 3 - ends in 03-04: 3, 4, 103, 104, 203, 204, ...
+				 * 4 - everything else: 0, 5, 6, 7, 8, 9, 10, 11, ...
+				 */
+				return ($number % 100 === 1) ? 1 : (($number % 100 === 2) ? 2 : ((($number % 100 === 3) || ($number % 100 === 4)) ? 3 : 4));
+
+			case 11:
+				/**
+				 * Families: Celtic (Irish Gaeilge)
+				 * 1 - 1
+				 * 2 - 2
+				 * 3 - is 3-6: 3, 4, 5, 6
+				 * 4 - is 7-10: 7, 8, 9, 10
+				 * 5 - everything else: 0, 11, 12, ...
+				 */
+				return ($number === 1) ? 1 : (($number === 2) ? 2 : (($number >= 3 && $number <= 6) ? 3 : (($number >= 7 && $number <= 10) ? 4 : 5)));
+
+			case 12:
+				/**
+				 * Families: Semitic (Arabic)
+				 * 1 - 1
+				 * 2 - 2
+				 * 3 - ends in 03-10: 3, 4, ... 10, 103, 104, ... 110, 203, 204, ...
+				 * 4 - ends in 11-99: 11, ... 99, 111, 112, ...
+				 * 5 - everything else: 100, 101, 102, 200, 201, 202, ...
+				 * 6 - 0
+				 */
+				return ($number === 1) ? 1 : (($number === 2) ? 2 : ((($number % 100 >= 3) && ($number % 100 <= 10)) ? 3 : ((($number % 100 >= 11) && ($number % 100 <= 99)) ? 4 : (($number != 0) ? 5 : 6))));
+
+			case 13:
+				/**
+				 * Families: Semitic (Maltese)
+				 * 1 - 1
+				 * 2 - is 0 or ends in 01-10: 0, 2, 3, ... 9, 10, 101, 102, ...
+				 * 3 - ends in 11-19: 11, 12, ... 18, 19, 111, 112, ...
+				 * 4 - everything else: 20, 21, ...
+				 */
+				return ($number === 1) ? 1 : ((($number === 0) || (($number % 100 > 1) && ($number % 100 < 11))) ? 2 : ((($number % 100 > 10) && ($number % 100 < 20)) ? 3 : 4));
+
+			case 14:
+				/**
+				 * Families: Slavic (Macedonian)
+				 * 1 - ends in 1: 1, 11, 21, ...
+				 * 2 - ends in 2: 2, 12, 22, ...
+				 * 3 - everything else: 0, 3, 4, ... 10, 13, 14, ... 20, 23, ...
+				 */
+				return ($number % 10 === 1) ? 1 : (($number % 10 === 2) ? 2 : 3);
+
+			case 15:
+				/**
+				 * Families: Icelandic
+				 * 1 - ends in 1, not 11: 1, 21, 31, ... 101, 121, 131, ...
+				 * 2 - everything else: 0, 2, 3, ... 10, 11, 12, ... 20, 22, ...
+				 */
+				return (($number % 10 === 1) && ($number % 100 != 11)) ? 1 : 2;
+		}
+	}
+
+	/**
+	 * Returns the ISO code of the used language
+	 *
+	 * @return string	The ISO code of the currently used language
+	 */
+	public function get_used_language()
+	{
+		return $this->language_fallback[0];
+	}
+
+	/**
+	 * Returns language fallback data
+	 *
+	 * @param bool	$reload	Whether or not to reload language files
+	 *
+	 * @return array
+	 */
+	protected function set_fallback_array($reload = false)
+	{
+		$fallback_array = array();
+
+		if ($this->user_language)
+		{
+			$fallback_array[] = $this->user_language;
+		}
+
+		if ($this->default_language)
+		{
+			$fallback_array[] = $this->default_language;
+		}
+
+		$fallback_array[] = self::FALLBACK_LANGUAGE;
+
+		$this->language_fallback = $fallback_array;
+
+		if ($reload)
+		{
+			$this->reload_language_files();
+		}
+	}
+
+	/**
+	 * Load core language file
+	 *
+	 * @param string	$component	Name of the component to load
+	 */
+	protected function load_core_file($component)
+	{
+		// Check if the component is already loaded
+		if (isset($this->loaded_language_sets['core'][$component]))
+		{
+			return;
+		}
+
+		$this->loader->load($component, $this->language_fallback, $this->lang);
+		$this->loaded_language_sets['core'][$component] = true;
+	}
+
+	/**
+	 * Load extension language file
+	 *
+	 * @param string	$extension_name	Name of the extension to load language from
+	 * @param string	$component		Name of the component to load
+	 */
+	protected function load_extension($extension_name, $component)
+	{
+		// Check if the component is already loaded
+		if (isset($this->loaded_language_sets['ext'][$extension_name][$component]))
+		{
+			return;
+		}
+
+		$this->loader->load_extension($extension_name, $component, $this->language_fallback, $this->lang);
+		$this->loaded_language_sets['ext'][$extension_name][$component] = true;
+	}
+
+	/**
+	 * Reload language files
+	 */
+	protected function reload_language_files()
+	{
+		$loaded_files = $this->loaded_language_sets;
+		$this->loaded_language_sets	= array(
+			'core'	=> array(),
+			'ext'	=> array(),
+		);
+
+		// Reload core files
+		foreach ($loaded_files['core'] as $component => $value)
+		{
+			$this->load_core_file($component);
+		}
+
+		// Reload extension files
+		foreach ($loaded_files['ext'] as $ext_name => $ext_info)
+		{
+			foreach ($ext_info as $ext_component => $value)
+			{
+				$this->load_extension($ext_name, $ext_component);
+			}
+		}
+	}
+}
diff --git a/phpBB/phpbb/language/language_file_helper.php b/phpBB/phpbb/language/language_file_helper.php
new file mode 100644
index 0000000000..85de034fb8
--- /dev/null
+++ b/phpBB/phpbb/language/language_file_helper.php
@@ -0,0 +1,72 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\language;
+
+use Symfony\Component\Finder\Finder;
+
+/**
+ * Helper class for language file related functions
+ */
+class language_file_helper
+{
+	/**
+	 * @var string	Path to phpBB's root
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * Constructor
+	 *
+	 * @param string	$phpbb_root_path	Path to phpBB's root
+	 */
+	public function __construct($phpbb_root_path)
+	{
+		$this->phpbb_root_path = $phpbb_root_path;
+	}
+
+	/**
+	 * Returns available languages
+	 *
+	 * @return array
+	 */
+	public function get_available_languages()
+	{
+		// Find available language packages
+		$finder = new Finder();
+		$finder->files()
+			->name('iso.txt')
+			->depth('== 1')
+			->followLinks()
+			->in($this->phpbb_root_path . 'language');
+
+		$available_languages = array();
+		foreach ($finder as $file)
+		{
+			$path = $file->getRelativePath();
+			$info = explode("\n", $file->getContents());
+
+			$available_languages[] = array(
+				// Get the name of the directory containing iso.txt
+				'iso' => $path,
+
+				// Recover data from file
+				'name' => trim($info[0]),
+				'local_name' => trim($info[1]),
+				'author' => trim($info[2])
+			);
+		}
+
+		return $available_languages;
+	}
+}
diff --git a/phpBB/phpbb/language/language_file_loader.php b/phpBB/phpbb/language/language_file_loader.php
new file mode 100644
index 0000000000..b6816afd16
--- /dev/null
+++ b/phpBB/phpbb/language/language_file_loader.php
@@ -0,0 +1,206 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\language;
+
+use \phpbb\language\exception\language_file_not_found;
+
+/**
+ * Language file loader
+ */
+class language_file_loader
+{
+	/**
+	 * @var string	Path to phpBB's root
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * @var string	Extension of PHP files
+	 */
+	protected $php_ext;
+
+	/**
+	 * @var \phpbb\extension\manager	Extension manager
+	 */
+	protected $extension_manager;
+
+	/**
+	 * Constructor
+	 *
+	 * @param string	$phpbb_root_path	Path to phpBB's root
+	 * @param string	$php_ext			Extension of PHP files
+	 */
+	public function __construct($phpbb_root_path, $php_ext)
+	{
+		$this->phpbb_root_path	= $phpbb_root_path;
+		$this->php_ext			= $php_ext;
+
+		$this->extension_manager = null;
+	}
+
+	/**
+	 * Extension manager setter
+	 *
+	 * @param \phpbb\extension\manager	$extension_manager	Extension manager
+	 */
+	public function set_extension_manager(\phpbb\extension\manager $extension_manager)
+	{
+		$this->extension_manager = $extension_manager;
+	}
+
+	/**
+	 * Loads language array for the given component
+	 *
+	 * @param string		$component	Name of the language component
+	 * @param string|array	$locale		ISO code of the language to load, or array of ISO codes if you want to
+	 * 									specify additional language fallback steps
+	 * @param array			$lang		Array reference containing language strings
+	 */
+	public function load($component, $locale, &$lang)
+	{
+		$locale = (array) $locale;
+
+		// Determine path to language directory
+		$path = $this->phpbb_root_path . 'language/';
+
+		$this->load_file($path, $component, $locale, $lang);
+	}
+
+	/**
+	 * Loads language array for the given extension component
+	 *
+	 * @param string		$extension	Name of the extension
+	 * @param string		$component	Name of the language component
+	 * @param string|array	$locale		ISO code of the language to load, or array of ISO codes if you want to
+	 * 									specify additional language fallback steps
+	 * @param array			$lang		Array reference containing language strings
+	 */
+	public function load_extension($extension, $component, $locale, &$lang)
+	{
+		// Check if extension manager was loaded
+		if ($this->extension_manager === null)
+		{
+			// If not, let's return
+			return;
+		}
+
+		$locale = (array) $locale;
+
+		// Determine path to language directory
+		$path = $this->extension_manager->get_extension_path($extension, true) . 'language/';
+
+		$this->load_file($path, $component, $locale, $lang);
+	}
+
+	/**
+	 * Prepares language file loading
+	 *
+	 * @param string	$path		Path to search for file in
+	 * @param string	$component	Name of the language component
+	 * @param array		$locale		Array containing language fallback options
+	 * @param array		$lang		Array reference of language strings
+	 */
+	protected function load_file($path, $component, $locale, &$lang)
+	{
+		// This is BC stuff and not the best idea as it makes language fallback
+		// implementation quite hard like below.
+		if (strpos($this->phpbb_root_path . $component, $path) === 0)
+		{
+			// Filter out the path
+			$path_diff = str_replace($path, '', dirname($this->phpbb_root_path . $component));
+			$language_file = basename($component, '.' . $this->php_ext);
+			$component = '';
+
+			// This step is needed to resolve language/en/subdir style $component
+			// $path already points to the language base directory so we need to eliminate
+			// the first directory from the path (that should be the language directory)
+			$path_diff_parts = explode('/', $path_diff);
+
+			if (count($path_diff_parts) > 1)
+			{
+				array_shift($path_diff_parts);
+				$component = implode('/', $path_diff_parts) . '/';
+			}
+
+			$component .= $language_file;
+		}
+
+		// Determine filename
+		$filename = $component . '.' . $this->php_ext;
+
+		// Determine path to file
+		$file_path = $this->get_language_file_path($path, $filename, $locale);
+
+		// Load language array
+		$this->load_language_file($file_path, $lang);
+	}
+
+	/**
+	 * This function implements language fallback logic
+	 *
+	 * @param string	$path		Path to language directory
+	 * @param string	$filename	Filename to load language strings from
+	 *
+	 * @return string	Relative path to language file
+	 *
+	 * @throws language_file_not_found	When the path to the file cannot be resolved
+	 */
+	protected function get_language_file_path($path, $filename, $locales)
+	{
+		$language_file_path = $filename;
+
+		// Language fallback logic
+		foreach ($locales as $locale)
+		{
+			$language_file_path = $path . $locale . '/' . $filename;
+
+			// If we are in install, try to use the updated version, when available
+			if (defined('IN_INSTALL'))
+			{
+				$install_language_path = str_replace('language/', 'install/update/new/language/', $language_file_path);
+				if (file_exists($install_language_path))
+				{
+					return $install_language_path;
+				}
+			}
+
+			if (file_exists($language_file_path))
+			{
+				return $language_file_path;
+			}
+		}
+
+		// The language file is not exist
+		throw new language_file_not_found('Language file ' . $language_file_path . ' couldn\'t be opened.');
+	}
+
+	/**
+	 * Loads language file
+	 *
+	 * @param string	$path	Path to language file to load
+	 * @param array		$lang	Reference of the array of language strings
+	 */
+	protected function load_language_file($path, &$lang)
+	{
+		// Do not suppress error if in DEBUG mode
+		if (defined('DEBUG'))
+		{
+			include $path;
+		}
+		else
+		{
+			@include $path;
+		}
+	}
+}
diff --git a/phpBB/phpbb/log/null.php b/phpBB/phpbb/log/dummy.php
index baa78895ea..5c2d145e15 100644
--- a/phpBB/phpbb/log/null.php
+++ b/phpBB/phpbb/log/dummy.php
@@ -14,9 +14,9 @@
 namespace phpbb\log;
 
 /**
-* Null logger
+* Dummy logger
 */
-class null implements log_interface
+class dummy implements log_interface
 {
 	/**
 	* {@inheritdoc}
diff --git a/phpBB/phpbb/log/log.php b/phpBB/phpbb/log/log.php
index 8f199cd931..5333fe2bdf 100644
--- a/phpBB/phpbb/log/log.php
+++ b/phpBB/phpbb/log/log.php
@@ -27,7 +27,7 @@ class log implements \phpbb\log\log_interface
 
 	/**
 	* An array with the disabled log types. Logs of such types will not be
-	* added when add_log() is called.
+	* added when add() is called.
 	* @var array
 	*/
 	protected $disabled_types;
@@ -223,7 +223,7 @@ class log implements \phpbb\log\log_interface
 			return false;
 		}
 
-		if ($log_time == false)
+		if ($log_time === false)
 		{
 			$log_time = time();
 		}
@@ -249,10 +249,13 @@ class log implements \phpbb\log\log_interface
 				unset($additional_data['forum_id']);
 				$topic_id = isset($additional_data['topic_id']) ? (int) $additional_data['topic_id'] : 0;
 				unset($additional_data['topic_id']);
+				$post_id = isset($additional_data['post_id']) ? (int) $additional_data['post_id'] : 0;
+				unset($additional_data['post_id']);
 				$sql_ary += array(
 					'log_type'		=> LOG_MOD,
 					'forum_id'		=> $forum_id,
 					'topic_id'		=> $topic_id,
+					'post_id'		=> $post_id,
 					'log_data'		=> (!empty($additional_data)) ? serialize($additional_data) : '',
 				);
 			break;
@@ -388,7 +391,7 @@ class log implements \phpbb\log\log_interface
 		{
 			$sql_where .= ' AND ';
 
-			if (is_array($field_value) && sizeof($field_value) == 2 && !is_array($field_value[1]))
+			if (is_array($field_value) && count($field_value) == 2 && !is_array($field_value[1]))
 			{
 				$sql_where .= $field . ' ' . $field_value[0] . ' ' . $field_value[1];
 			}
@@ -643,6 +646,7 @@ class log implements \phpbb\log\log_interface
 				'time'				=> (int) $row['log_time'],
 				'forum_id'			=> (int) $row['forum_id'],
 				'topic_id'			=> (int) $row['topic_id'],
+				'post_id'			=> (int) $row['post_id'],
 
 				'viewforum'			=> ($row['forum_id'] && $this->auth->acl_get('f_read', $row['forum_id'])) ? append_sid("{$this->phpbb_root_path}viewforum.{$this->php_ext}", 'f=' . $row['forum_id']) : false,
 				'action'			=> (isset($this->user->lang[$row['log_operation']])) ? $row['log_operation'] : '{' . ucfirst(str_replace('_', ' ', $row['log_operation'])) . '}',
@@ -685,9 +689,9 @@ class log implements \phpbb\log\log_interface
 						}
 					}
 
-					if (($num_args - sizeof($log_data_ary)) > 0)
+					if (($num_args - count($log_data_ary)) > 0)
 					{
-						$log_data_ary = array_merge($log_data_ary, array_fill(0, $num_args - sizeof($log_data_ary), ''));
+						$log_data_ary = array_merge($log_data_ary, array_fill(0, $num_args - count($log_data_ary), ''));
 					}
 
 					$lang_arguments = array_merge(array($log[$i]['action']), $log_data_ary);
@@ -736,18 +740,19 @@ class log implements \phpbb\log\log_interface
 		$vars = array('log', 'topic_id_list', 'reportee_id_list');
 		extract($this->dispatcher->trigger_event('core.get_logs_get_additional_data', compact($vars)));
 
-		if (sizeof($topic_id_list))
+		if (count($topic_id_list))
 		{
 			$topic_auth = $this->get_topic_auth($topic_id_list);
 
 			foreach ($log as $key => $row)
 			{
 				$log[$key]['viewtopic'] = (isset($topic_auth['f_read'][$row['topic_id']])) ? append_sid("{$this->phpbb_root_path}viewtopic.{$this->php_ext}", 'f=' . $topic_auth['f_read'][$row['topic_id']] . '&amp;t=' . $row['topic_id']) : false;
+				$log[$key]['viewpost'] = (isset($topic_auth['f_read'][$row['topic_id']]) && $row['post_id']) ? append_sid("{$this->phpbb_root_path}viewtopic.{$this->php_ext}", 'f=' . $topic_auth['f_read'][$row['topic_id']] . '&amp;t=' . $row['topic_id'] . '&amp;p=' . $row['post_id'] . '#p' . $row['post_id']) : false;
 				$log[$key]['viewlogs'] = (isset($topic_auth['m_'][$row['topic_id']])) ? append_sid("{$this->phpbb_root_path}mcp.{$this->php_ext}", 'i=logs&amp;mode=topic_logs&amp;t=' . $row['topic_id'], true, $this->user->session_id) : false;
 			}
 		}
 
-		if (sizeof($reportee_id_list))
+		if (count($reportee_id_list))
 		{
 			$reportee_data_list = $this->get_reportee_data($reportee_id_list);
 
@@ -833,7 +838,7 @@ class log implements \phpbb\log\log_interface
 			$keywords_pattern = array();
 
 			// Build pattern and keywords...
-			for ($i = 0, $num_keywords = sizeof($keywords); $i < $num_keywords; $i++)
+			for ($i = 0, $num_keywords = count($keywords); $i < $num_keywords; $i++)
 			{
 				$keywords_pattern[] = preg_quote($keywords[$i], '#');
 				$keywords[$i] = $this->db->sql_like_expression($this->db->get_any_char() . $keywords[$i] . $this->db->get_any_char());
@@ -928,6 +933,20 @@ class log implements \phpbb\log\log_interface
 				$forum_auth['f_read'][$row['topic_id']] = $row['forum_id'];
 			}
 
+			/**
+			 * Allow modifying SQL query after topic data is retrieved (inside loop).
+			 *
+			 * @event core.phpbb_log_get_topic_auth_sql_after
+			 * @var	array	forum_auth	Forum permissions
+			 * @var	array	row			One row of data from SQL query
+			 * @since 3.2.2-RC1
+			 */
+			$vars = array(
+				'forum_auth',
+				'row',
+			);
+			extract($this->dispatcher->trigger_event('core.phpbb_log_get_topic_auth_sql_after', compact($vars)));
+
 			if ($this->auth->acl_gets('a_', 'm_', $row['forum_id']))
 			{
 				$forum_auth['m_'][$row['topic_id']] = $row['forum_id'];
diff --git a/phpBB/phpbb/log/log_interface.php b/phpBB/phpbb/log/log_interface.php
index 5932f722aa..86286e6f88 100644
--- a/phpBB/phpbb/log/log_interface.php
+++ b/phpBB/phpbb/log/log_interface.php
@@ -32,8 +32,8 @@ interface log_interface
 	* Disable log
 	*
 	* This function allows disabling the log system or parts of it, for this
-	* page call. When add_log is called and the type is disabled,
-	* the log will not be added to the database.
+	* page call. When add() is called and the type is disabled, the log will
+	* not be added to the database.
 	*
 	* @param	mixed	$type	The log type we want to disable. Empty to
 	*						disable all logs. Can also be an array of types.
@@ -57,12 +57,12 @@ interface log_interface
 	/**
 	* Adds a log entry to the database
 	*
-	* @param	string	$mode				The mode defines which log_type is used and from which log the entry is retrieved
-	* @param	int		$user_id			User ID of the user
-	* @param	string	$log_ip				IP address of the user
-	* @param	string	$log_operation		Name of the operation
-	* @param	int		$log_time			Timestamp when the log entry was added, if empty time() will be used
-	* @param	array	$additional_data	More arguments can be added, depending on the log_type
+	* @param	string		$mode				The mode defines which log_type is used and from which log the entry is retrieved
+	* @param	int			$user_id			User ID of the user
+	* @param	string		$log_ip				IP address of the user
+	* @param	string		$log_operation		Name of the operation
+	* @param	int|bool	$log_time			Timestamp when the log entry was added. If false, time() will be used
+	* @param	array		$additional_data	More arguments can be added, depending on the log_type
 	*
 	* @return	int|bool		Returns the log_id, if the entry was added to the database, false otherwise.
 	*/
diff --git a/phpBB/phpbb/message/admin_form.php b/phpBB/phpbb/message/admin_form.php
index 96b8d3499e..ae1c1d8614 100644
--- a/phpBB/phpbb/message/admin_form.php
+++ b/phpBB/phpbb/message/admin_form.php
@@ -22,6 +22,9 @@ class admin_form extends form
 	/** @var \phpbb\config\db_text */
 	protected $config_text;
 
+	/** @var \phpbb\event\dispatcher_interface */
+	protected $dispatcher;
+
 	/** @var string */
 	protected $subject;
 	/** @var string */
@@ -37,13 +40,15 @@ class admin_form extends form
 	* @param \phpbb\config\db_text $config_text
 	* @param \phpbb\db\driver\driver_interface $db
 	* @param \phpbb\user $user
+	* @param \phpbb\event\dispatcher_interface $dispatcher
 	* @param string $phpbb_root_path
 	* @param string $phpEx
 	*/
-	public function __construct(\phpbb\auth\auth $auth, \phpbb\config\config $config, \phpbb\config\db_text $config_text, \phpbb\db\driver\driver_interface $db, \phpbb\user $user, $phpbb_root_path, $phpEx)
+	public function __construct(\phpbb\auth\auth $auth, \phpbb\config\config $config, \phpbb\config\db_text $config_text, \phpbb\db\driver\driver_interface $db, \phpbb\user $user, \phpbb\event\dispatcher_interface $dispatcher, $phpbb_root_path, $phpEx)
 	{
 		parent::__construct($auth, $config, $db, $user, $phpbb_root_path, $phpEx);
 		$this->config_text = $config_text;
+		$this->dispatcher = $dispatcher;
 	}
 
 	/**
@@ -91,6 +96,29 @@ class admin_form extends form
 			$this->errors[] = $this->user->lang['EMPTY_MESSAGE_EMAIL'];
 		}
 
+		$subject = $this->subject;
+		$body = $this->body;
+		$errors = $this->errors;
+
+		/**
+		* You can use this event to modify subject and/or body and add new errors.
+		*
+		* @event core.message_admin_form_submit_before
+		* @var	string	subject	Message subject
+		* @var	string	body	Message body
+		* @var	array	errors	Form errors
+		* @since 3.2.6-RC1
+		*/
+		$vars = [
+			'subject',
+			'body',
+			'errors',
+		];
+		extract($this->dispatcher->trigger_event('core.message_admin_form_submit_before', compact($vars)));
+		$this->subject = $subject;
+		$this->body = $body;
+		$this->errors = $errors;
+
 		if ($this->user->data['is_registered'])
 		{
 			$this->message->set_sender_from_user($this->user);
diff --git a/phpBB/phpbb/message/form.php b/phpBB/phpbb/message/form.php
index 21d4de0b4d..6573a04f8b 100644
--- a/phpBB/phpbb/message/form.php
+++ b/phpBB/phpbb/message/form.php
@@ -136,10 +136,10 @@ abstract class form
 	{
 		if (!check_form_key('memberlist_email'))
 		{
-			$this->errors[] = 'FORM_INVALID';
+			$this->errors[] = $this->user->lang('FORM_INVALID');
 		}
 
-		if (!sizeof($this->errors))
+		if (!count($this->errors))
 		{
 			$sql = 'UPDATE ' . USERS_TABLE . '
 				SET user_emailtime = ' . time() . '
@@ -169,7 +169,7 @@ abstract class form
 		add_form_key('memberlist_email');
 
 		$template->assign_vars(array(
-			'ERROR_MESSAGE'		=> (sizeof($this->errors)) ? implode('<br />', $this->errors) : '',
+			'ERROR_MESSAGE'		=> (count($this->errors)) ? implode('<br />', $this->errors) : '',
 		));
 	}
 }
diff --git a/phpBB/phpbb/message/message.php b/phpBB/phpbb/message/message.php
index 5fd24b542e..fa701d1c77 100644
--- a/phpBB/phpbb/message/message.php
+++ b/phpBB/phpbb/message/message.php
@@ -209,7 +209,7 @@ class message
 	*/
 	public function cc_sender()
 	{
-		if (!sizeof($this->recipients))
+		if (!count($this->recipients))
 		{
 			trigger_error('No email recipients specified');
 		}
@@ -238,7 +238,7 @@ class message
 	*/
 	public function send(\messenger $messenger, $contact)
 	{
-		if (!sizeof($this->recipients))
+		if (!count($this->recipients))
 		{
 			return;
 		}
@@ -271,7 +271,7 @@ class message
 				'MESSAGE'		=> htmlspecialchars_decode($this->body))
 			);
 
-			if (sizeof($this->template_vars))
+			if (count($this->template_vars))
 			{
 				$messenger->assign_vars($this->template_vars);
 			}
diff --git a/phpBB/phpbb/message/topic_form.php b/phpBB/phpbb/message/topic_form.php
index 174643bb81..dbb883c142 100644
--- a/phpBB/phpbb/message/topic_form.php
+++ b/phpBB/phpbb/message/topic_form.php
@@ -71,6 +71,14 @@ class topic_form extends form
 
 		if (!$this->auth->acl_get('f_read', $this->topic_row['forum_id']))
 		{
+			if ($this->user->data['user_id'] != ANONYMOUS)
+			{
+				send_status_line(403, 'Forbidden');
+			}
+			else
+			{
+				send_status_line(401, 'Unauthorized');
+			}
 			return 'SORRY_AUTH_READ';
 		}
 
diff --git a/phpBB/phpbb/module/exception/module_exception.php b/phpBB/phpbb/module/exception/module_exception.php
new file mode 100644
index 0000000000..8ad75112bc
--- /dev/null
+++ b/phpBB/phpbb/module/exception/module_exception.php
@@ -0,0 +1,19 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\module\exception;
+
+class module_exception extends \phpbb\exception\runtime_exception
+{
+
+}
diff --git a/phpBB/phpbb/module/exception/module_not_found_exception.php b/phpBB/phpbb/module/exception/module_not_found_exception.php
new file mode 100644
index 0000000000..2d485e7b35
--- /dev/null
+++ b/phpBB/phpbb/module/exception/module_not_found_exception.php
@@ -0,0 +1,19 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\module\exception;
+
+class module_not_found_exception extends module_exception
+{
+
+}
diff --git a/phpBB/phpbb/module/module_manager.php b/phpBB/phpbb/module/module_manager.php
new file mode 100644
index 0000000000..00df33f62f
--- /dev/null
+++ b/phpBB/phpbb/module/module_manager.php
@@ -0,0 +1,564 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\module;
+
+use phpbb\module\exception\module_exception;
+use phpbb\module\exception\module_not_found_exception;
+
+class module_manager
+{
+	/**
+	 * @var \phpbb\cache\driver\driver_interface
+	 */
+	protected $cache;
+
+	/**
+	 * @var \phpbb\db\driver\driver_interface
+	 */
+	protected $db;
+
+	/**
+	 * @var \phpbb\extension\manager
+	 */
+	protected $extension_manager;
+
+	/**
+	 * @var string
+	 */
+	protected $modules_table;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * @var string
+	 */
+	protected $php_ext;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\cache\driver\driver_interface	$cache				Cache driver
+	 * @param \phpbb\db\driver\driver_interface		$db					Database driver
+	 * @param \phpbb\extension\manager				$ext_manager		Extension manager
+	 * @param string								$modules_table		Module database table's name
+	 * @param string								$phpbb_root_path	Path to phpBB's root
+	 * @param string								$php_ext			Extension of PHP files
+	 */
+	public function __construct(\phpbb\cache\driver\driver_interface $cache, \phpbb\db\driver\driver_interface $db, \phpbb\extension\manager $ext_manager, $modules_table, $phpbb_root_path, $php_ext)
+	{
+		$this->cache				= $cache;
+		$this->db					= $db;
+		$this->extension_manager	= $ext_manager;
+		$this->modules_table		= $modules_table;
+		$this->phpbb_root_path		= $phpbb_root_path;
+		$this->php_ext				= $php_ext;
+	}
+
+	/**
+	 * Get row for specified module
+	 *
+	 * @param int		$module_id		ID of the module
+	 * @param string	$module_class	Class of the module (acp, ucp, mcp etc...)
+	 *
+	 * @return array	Array of data fetched from the database
+	 *
+	 * @throws \phpbb\module\exception\module_not_found_exception	When there is no module with $module_id
+	 */
+	public function get_module_row($module_id, $module_class)
+	{
+		$module_id = (int) $module_id;
+
+		$sql = 'SELECT *
+			FROM ' . $this->modules_table . "
+			WHERE module_class = '" . $this->db->sql_escape($module_class) . "'
+				AND module_id = $module_id";
+		$result = $this->db->sql_query($sql);
+		$row = $this->db->sql_fetchrow($result);
+		$this->db->sql_freeresult($result);
+
+		if (!$row)
+		{
+			throw new module_not_found_exception('NO_MODULE');
+		}
+
+		return $row;
+	}
+
+	/**
+	 * Get available module information from module files
+	 *
+	 * @param string	$module_class		Class of the module (acp, ucp, mcp etc...)
+	 * @param string	$module				ID of module
+	 * @param bool		$use_all_available	Use all available instead of just all
+	 *										enabled extensions
+	 *
+	 * @return array	Array with module information gathered from module info files.
+	 */
+	public function get_module_infos($module_class, $module = '', $use_all_available = false)
+	{
+		$directory = $this->phpbb_root_path . 'includes/' . $module_class . '/info/';
+		$fileinfo = array();
+
+		$finder = $this->extension_manager->get_finder($use_all_available);
+
+		$modules = $finder
+			->extension_suffix('_module')
+			->extension_directory("/$module_class")
+			->core_path("includes/$module_class/info/")
+			->core_prefix($module_class . '_')
+			->get_classes(true);
+
+		foreach ($modules as $cur_module)
+		{
+			// Skip entries we do not need if we know the module we are
+			// looking for
+			if ($module && strpos(str_replace('\\', '_', $cur_module), $module) === false && $module !== $cur_module)
+			{
+				continue;
+			}
+
+			$info_class = preg_replace('/_module$/', '_info', $cur_module);
+
+			// If the class does not exist it might be following the old
+			// format. phpbb_acp_info_acp_foo needs to be turned into
+			// acp_foo_info and the respective file has to be included
+			// manually because it does not support auto loading
+			$old_info_class_file = str_replace("phpbb_{$module_class}_info_", '', $cur_module);
+			$old_info_class = $old_info_class_file . '_info';
+
+			if (class_exists($old_info_class))
+			{
+				$info_class = $old_info_class;
+			}
+			else if (!class_exists($info_class))
+			{
+				$info_class = $old_info_class;
+
+				// need to check class exists again because previous checks triggered autoloading
+				if (!class_exists($info_class) && file_exists($directory . $old_info_class_file . '.' . $this->php_ext))
+				{
+					include($directory . $old_info_class_file . '.' . $this->php_ext);
+				}
+			}
+
+			if (class_exists($info_class))
+			{
+				$info = new $info_class();
+				$module_info = $info->module();
+
+				$main_class = (isset($module_info['filename'])) ? $module_info['filename'] : $cur_module;
+
+				$fileinfo[$main_class] = $module_info;
+			}
+		}
+
+		ksort($fileinfo);
+
+		return $fileinfo;
+	}
+
+	/**
+	 * Get module branch
+	 *
+	 * @param int		$module_id		ID of the module
+	 * @param string	$module_class	Class of the module (acp, ucp, mcp etc...)
+	 * @param string	$type			Type of branch (Expected values: all, parents or children)
+	 * @param bool		$include_module	Whether or not to include the specified module with $module_id
+	 *
+	 * @return array	Returns an array containing the modules in the specified branch type.
+	 */
+	public function get_module_branch($module_id, $module_class, $type = 'all', $include_module = true)
+	{
+		$module_id = (int) $module_id;
+
+		switch ($type)
+		{
+			case 'parents':
+				$condition = 'm1.left_id BETWEEN m2.left_id AND m2.right_id';
+			break;
+
+			case 'children':
+				$condition = 'm2.left_id BETWEEN m1.left_id AND m1.right_id';
+			break;
+
+			default:
+				$condition = 'm2.left_id BETWEEN m1.left_id AND m1.right_id OR m1.left_id BETWEEN m2.left_id AND m2.right_id';
+			break;
+		}
+
+		$rows = array();
+
+		$sql = 'SELECT m2.*
+			FROM ' . $this->modules_table . ' m1
+			LEFT JOIN ' . $this->modules_table . " m2 ON ($condition)
+			WHERE m1.module_class = '" . $this->db->sql_escape($module_class) . "'
+				AND m2.module_class = '" . $this->db->sql_escape($module_class) . "'
+				AND m1.module_id = $module_id
+			ORDER BY m2.left_id";
+		$result = $this->db->sql_query($sql);
+
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			if (!$include_module && $row['module_id'] == $module_id)
+			{
+				continue;
+			}
+
+			$rows[] = $row;
+		}
+		$this->db->sql_freeresult($result);
+
+		return $rows;
+	}
+
+	/**
+	 * Remove modules cache file
+	 *
+	 * @param string	$module_class	Class of the module (acp, ucp, mcp etc...)
+	 */
+	public function remove_cache_file($module_class)
+	{
+		// Sanitise for future path use, it's escaped as appropriate for queries
+		$cache_class = str_replace(array('.', '/', '\\'), '', basename($module_class));
+		$this->cache->destroy('_modules_' . $cache_class);
+		$this->cache->destroy('sql', $this->modules_table);
+	}
+
+	/**
+	 * Update/Add module
+	 *
+	 * @param array	&$module_data	The module data
+	 *
+	 * @throws \phpbb\module\exception\module_not_found_exception	When parent module or the category is not exist
+	 */
+	public function update_module_data(&$module_data)
+	{
+		if (!isset($module_data['module_id']))
+		{
+			// no module_id means we're creating a new category/module
+			if ($module_data['parent_id'])
+			{
+				$sql = 'SELECT left_id, right_id
+					FROM ' . $this->modules_table . "
+					WHERE module_class = '" . $this->db->sql_escape($module_data['module_class']) . "'
+						AND module_id = " . (int) $module_data['parent_id'];
+				$result = $this->db->sql_query($sql);
+				$row = $this->db->sql_fetchrow($result);
+				$this->db->sql_freeresult($result);
+
+				if (!$row)
+				{
+					throw new module_not_found_exception('PARENT_NOT_EXIST');
+				}
+
+				// Workaround
+				$row['left_id'] = (int) $row['left_id'];
+				$row['right_id'] = (int) $row['right_id'];
+
+				$sql = 'UPDATE ' . $this->modules_table . "
+					SET left_id = left_id + 2, right_id = right_id + 2
+					WHERE module_class = '" . $this->db->sql_escape($module_data['module_class']) . "'
+						AND left_id > {$row['right_id']}";
+				$this->db->sql_query($sql);
+
+				$sql = 'UPDATE ' . $this->modules_table . "
+					SET right_id = right_id + 2
+					WHERE module_class = '" . $this->db->sql_escape($module_data['module_class']) . "'
+						AND {$row['left_id']} BETWEEN left_id AND right_id";
+				$this->db->sql_query($sql);
+
+				$module_data['left_id'] = (int) $row['right_id'];
+				$module_data['right_id'] = (int) $row['right_id'] + 1;
+			}
+			else
+			{
+				$sql = 'SELECT MAX(right_id) AS right_id
+					FROM ' . $this->modules_table . "
+					WHERE module_class = '" . $this->db->sql_escape($module_data['module_class']) . "'";
+				$result = $this->db->sql_query($sql);
+				$row = $this->db->sql_fetchrow($result);
+				$this->db->sql_freeresult($result);
+
+				$module_data['left_id'] = (int) $row['right_id'] + 1;
+				$module_data['right_id'] = (int) $row['right_id'] + 2;
+			}
+
+			$sql = 'INSERT INTO ' . $this->modules_table . ' ' . $this->db->sql_build_array('INSERT', $module_data);
+			$this->db->sql_query($sql);
+
+			$module_data['module_id'] = $this->db->sql_nextid();
+		}
+		else
+		{
+			$row = $this->get_module_row($module_data['module_id'], $module_data['module_class']);
+
+			if ($module_data['module_basename'] && !$row['module_basename'])
+			{
+				// we're turning a category into a module
+				$branch = $this->get_module_branch($module_data['module_id'], $module_data['module_class'], 'children', false);
+
+				if (count($branch))
+				{
+					throw new module_not_found_exception('NO_CATEGORY_TO_MODULE');
+				}
+			}
+
+			if ($row['parent_id'] != $module_data['parent_id'])
+			{
+				$this->move_module($module_data['module_id'], $module_data['parent_id'], $module_data['module_class']);
+			}
+
+			$update_ary = $module_data;
+			unset($update_ary['module_id']);
+
+			$sql = 'UPDATE ' . $this->modules_table . '
+				SET ' . $this->db->sql_build_array('UPDATE', $update_ary) . "
+				WHERE module_class = '" . $this->db->sql_escape($module_data['module_class']) . "'
+					AND module_id = " . (int) $module_data['module_id'];
+			$this->db->sql_query($sql);
+		}
+	}
+
+	/**
+	 * Move module around the tree
+	 *
+	 * @param int		$from_module_id	ID of the current parent module
+	 * @param int		$to_parent_id	ID of the target parent module
+	 * @param string	$module_class	Class of the module (acp, ucp, mcp etc...)
+	 *
+	 * @throws \phpbb\module\exception\module_not_found_exception	If the module specified to move modules from does not
+	 * 																have any children.
+	 */
+	public function move_module($from_module_id, $to_parent_id, $module_class)
+	{
+		$moved_modules = $this->get_module_branch($from_module_id, $module_class, 'children');
+
+		if (empty($moved_modules))
+		{
+			throw new module_not_found_exception();
+		}
+
+		$from_data = $moved_modules[0];
+		$diff = count($moved_modules) * 2;
+
+		$moved_ids = array();
+		for ($i = 0, $size = count($moved_modules); $i < $size; ++$i)
+		{
+			$moved_ids[] = $moved_modules[$i]['module_id'];
+		}
+
+		// Resync parents
+		$sql = 'UPDATE ' . $this->modules_table . "
+			SET right_id = right_id - $diff
+			WHERE module_class = '" . $this->db->sql_escape($module_class) . "'
+				AND left_id < " . (int) $from_data['right_id'] . '
+				AND right_id > ' . (int) $from_data['right_id'];
+		$this->db->sql_query($sql);
+
+		// Resync righthand side of tree
+		$sql = 'UPDATE ' . $this->modules_table . "
+			SET left_id = left_id - $diff, right_id = right_id - $diff
+			WHERE module_class = '" . $this->db->sql_escape($module_class) . "'
+				AND left_id > " . (int) $from_data['right_id'];
+		$this->db->sql_query($sql);
+
+		if ($to_parent_id > 0)
+		{
+			$to_data = $this->get_module_row($to_parent_id, $module_class);
+
+			// Resync new parents
+			$sql = 'UPDATE ' . $this->modules_table . "
+				SET right_id = right_id + $diff
+				WHERE module_class = '" . $this->db->sql_escape($module_class) . "'
+					AND " . (int) $to_data['right_id'] . ' BETWEEN left_id AND right_id
+					AND ' . $this->db->sql_in_set('module_id', $moved_ids, true);
+			$this->db->sql_query($sql);
+
+			// Resync the righthand side of the tree
+			$sql = 'UPDATE ' . $this->modules_table . "
+				SET left_id = left_id + $diff, right_id = right_id + $diff
+				WHERE module_class = '" . $this->db->sql_escape($module_class) . "'
+					AND left_id > " . (int) $to_data['right_id'] . '
+					AND ' . $this->db->sql_in_set('module_id', $moved_ids, true);
+			$this->db->sql_query($sql);
+
+			// Resync moved branch
+			$to_data['right_id'] += $diff;
+			if ($to_data['right_id'] > $from_data['right_id'])
+			{
+				$diff = '+ ' . ($to_data['right_id'] - $from_data['right_id'] - 1);
+			}
+			else
+			{
+				$diff = '- ' . abs($to_data['right_id'] - $from_data['right_id'] - 1);
+			}
+		}
+		else
+		{
+			$sql = 'SELECT MAX(right_id) AS right_id
+				FROM ' . $this->modules_table . "
+				WHERE module_class = '" . $this->db->sql_escape($module_class) . "'
+					AND " . $this->db->sql_in_set('module_id', $moved_ids, true);
+			$result = $this->db->sql_query($sql);
+			$row = $this->db->sql_fetchrow($result);
+			$this->db->sql_freeresult($result);
+
+			$diff = '+ ' . (int) ($row['right_id'] - $from_data['left_id'] + 1);
+		}
+
+		$sql = 'UPDATE ' . $this->modules_table . "
+			SET left_id = left_id $diff, right_id = right_id $diff
+			WHERE module_class = '" . $this->db->sql_escape($module_class) . "'
+				AND " . $this->db->sql_in_set('module_id', $moved_ids);
+		$this->db->sql_query($sql);
+	}
+
+	/**
+	 * Remove module from tree
+	 *
+	 * @param int		$module_id		ID of the module to delete
+	 * @param string	$module_class	Class of the module (acp, ucp, mcp etc...)
+	 *
+	 * @throws \phpbb\module\exception\module_exception	When the specified module cannot be removed
+	 */
+	public function delete_module($module_id, $module_class)
+	{
+		$module_id = (int) $module_id;
+
+		$row = $this->get_module_row($module_id, $module_class);
+
+		$branch = $this->get_module_branch($module_id, $module_class, 'children', false);
+
+		if (count($branch))
+		{
+			throw new module_exception('CANNOT_REMOVE_MODULE');
+		}
+
+		// If not move
+		$diff = 2;
+		$sql = 'DELETE FROM ' . $this->modules_table . "
+			WHERE module_class = '" . $this->db->sql_escape($module_class) . "'
+				AND module_id = $module_id";
+		$this->db->sql_query($sql);
+
+		$row['right_id'] = (int) $row['right_id'];
+		$row['left_id'] = (int) $row['left_id'];
+
+		// Resync tree
+		$sql = 'UPDATE ' . $this->modules_table . "
+			SET right_id = right_id - $diff
+			WHERE module_class = '" . $this->db->sql_escape($module_class) . "'
+				AND left_id < {$row['right_id']} AND right_id > {$row['right_id']}";
+		$this->db->sql_query($sql);
+
+		$sql = 'UPDATE ' . $this->modules_table . "
+			SET left_id = left_id - $diff, right_id = right_id - $diff
+			WHERE module_class = '" . $this->db->sql_escape($module_class) . "'
+				AND left_id > {$row['right_id']}";
+		$this->db->sql_query($sql);
+	}
+
+	/**
+	 * Move module position by $steps up/down
+	 *
+	 * @param array		$module_row		Array of module data
+	 * @param string	$module_class	Class of the module (acp, ucp, mcp etc...)
+	 * @param string	$action			Direction of moving (valid values: move_up or move_down)
+	 * @param int		$steps			Number of steps to move module
+	 *
+	 * @return string	Returns the language name of the module
+	 *
+	 * @throws \phpbb\module\exception\module_not_found_exception	When the specified module does not exists
+	 */
+	public function move_module_by($module_row, $module_class, $action = 'move_up', $steps = 1)
+	{
+		/**
+		 * Fetch all the siblings between the module's current spot
+		 * and where we want to move it to. If there are less than $steps
+		 * siblings between the current spot and the target then the
+		 * module will move as far as possible
+		 */
+		$sql = 'SELECT module_id, left_id, right_id, module_langname
+			FROM ' . $this->modules_table . "
+			WHERE module_class = '" . $this->db->sql_escape($module_class) . "'
+				AND parent_id = " . (int) $module_row['parent_id'] . '
+				AND ' . (($action == 'move_up') ? 'right_id < ' . (int) $module_row['right_id'] . ' ORDER BY right_id DESC' : 'left_id > ' . (int) $module_row['left_id'] . ' ORDER BY left_id ASC');
+		$result = $this->db->sql_query_limit($sql, $steps);
+
+		$target = array();
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			$target = $row;
+		}
+		$this->db->sql_freeresult($result);
+
+		if (!count($target))
+		{
+			// The module is already on top or bottom
+			throw new module_not_found_exception();
+		}
+
+		/**
+		 * $left_id and $right_id define the scope of the nodes that are affected by the move.
+		 * $diff_up and $diff_down are the values to substract or add to each node's left_id
+		 * and right_id in order to move them up or down.
+		 * $move_up_left and $move_up_right define the scope of the nodes that are moving
+		 * up. Other nodes in the scope of ($left_id, $right_id) are considered to move down.
+		 */
+		if ($action == 'move_up')
+		{
+			$left_id = (int) $target['left_id'];
+			$right_id = (int) $module_row['right_id'];
+
+			$diff_up = (int) ($module_row['left_id'] - $target['left_id']);
+			$diff_down = (int) ($module_row['right_id'] + 1 - $module_row['left_id']);
+
+			$move_up_left = (int) $module_row['left_id'];
+			$move_up_right = (int) $module_row['right_id'];
+		}
+		else
+		{
+			$left_id = (int) $module_row['left_id'];
+			$right_id = (int) $target['right_id'];
+
+			$diff_up = (int) ($module_row['right_id'] + 1 - $module_row['left_id']);
+			$diff_down = (int) ($target['right_id'] - $module_row['right_id']);
+
+			$move_up_left = (int) ($module_row['right_id'] + 1);
+			$move_up_right = (int) $target['right_id'];
+		}
+
+		// Now do the dirty job
+		$sql = 'UPDATE ' . $this->modules_table . "
+			SET left_id = left_id + CASE
+				WHEN left_id BETWEEN {$move_up_left} AND {$move_up_right} THEN -{$diff_up}
+				ELSE {$diff_down}
+			END,
+			right_id = right_id + CASE
+				WHEN right_id BETWEEN {$move_up_left} AND {$move_up_right} THEN -{$diff_up}
+				ELSE {$diff_down}
+			END
+			WHERE module_class = '" . $this->db->sql_escape($module_class) . "'
+				AND left_id BETWEEN {$left_id} AND {$right_id}
+				AND right_id BETWEEN {$left_id} AND {$right_id}";
+		$this->db->sql_query($sql);
+
+		$this->remove_cache_file($module_class);
+
+		return $target['module_langname'];
+	}
+}
diff --git a/phpBB/phpbb/notification/exception.php b/phpBB/phpbb/notification/exception.php
index 83c4526df7..e416438061 100644
--- a/phpBB/phpbb/notification/exception.php
+++ b/phpBB/phpbb/notification/exception.php
@@ -17,10 +17,6 @@ namespace phpbb\notification;
 * Notifications exception
 */
 
-class exception extends \Exception
+class exception extends \phpbb\exception\runtime_exception
 {
-	public function __toString()
-	{
-		return $this->getMessage();
-	}
 }
diff --git a/phpBB/phpbb/notification/manager.php b/phpBB/phpbb/notification/manager.php
index f5663f4b34..52c650df5d 100644
--- a/phpBB/phpbb/notification/manager.php
+++ b/phpBB/phpbb/notification/manager.php
@@ -26,7 +26,7 @@ class manager
 	/** @var array */
 	protected $subscription_types;
 
-	/** @var array */
+	/** @var method\method_interface[] */
 	protected $notification_methods;
 
 	/** @var ContainerInterface */
@@ -35,9 +35,6 @@ class manager
 	/** @var \phpbb\user_loader */
 	protected $user_loader;
 
-	/** @var \phpbb\config\config */
-	protected $config;
-
 	/** @var \phpbb\event\dispatcher_interface */
 	protected $phpbb_dispatcher;
 
@@ -47,22 +44,16 @@ class manager
 	/** @var \phpbb\cache\service */
 	protected $cache;
 
+	/** @var \phpbb\language\language */
+	protected $language;
+
 	/** @var \phpbb\user */
 	protected $user;
 
 	/** @var string */
-	protected $phpbb_root_path;
-
-	/** @var string */
-	protected $php_ext;
-
-	/** @var string */
 	protected $notification_types_table;
 
 	/** @var string */
-	protected $notifications_table;
-
-	/** @var string */
 	protected $user_notifications_table;
 
 	/**
@@ -72,43 +63,37 @@ class manager
 	* @param array $notification_methods
 	* @param ContainerInterface $phpbb_container
 	* @param \phpbb\user_loader $user_loader
-	* @param \phpbb\config\config $config
 	* @param \phpbb\event\dispatcher_interface $phpbb_dispatcher
 	* @param \phpbb\db\driver\driver_interface $db
 	* @param \phpbb\cache\service $cache
+	* @param \phpbb\language\language $language
 	* @param \phpbb\user $user
-	* @param string $phpbb_root_path
-	* @param string $php_ext
 	* @param string $notification_types_table
-	* @param string $notifications_table
 	* @param string $user_notifications_table
 	*
 	* @return \phpbb\notification\manager
 	*/
-	public function __construct($notification_types, $notification_methods, ContainerInterface $phpbb_container, \phpbb\user_loader $user_loader, \phpbb\config\config $config, \phpbb\event\dispatcher_interface $phpbb_dispatcher, \phpbb\db\driver\driver_interface $db, \phpbb\cache\service $cache, $user, $phpbb_root_path, $php_ext, $notification_types_table, $notifications_table, $user_notifications_table)
+	public function __construct($notification_types, $notification_methods, ContainerInterface $phpbb_container, \phpbb\user_loader $user_loader, \phpbb\event\dispatcher_interface $phpbb_dispatcher, \phpbb\db\driver\driver_interface $db, \phpbb\cache\service $cache, \phpbb\language\language $language, \phpbb\user $user, $notification_types_table, $user_notifications_table)
 	{
 		$this->notification_types = $notification_types;
 		$this->notification_methods = $notification_methods;
 		$this->phpbb_container = $phpbb_container;
 
 		$this->user_loader = $user_loader;
-		$this->config = $config;
 		$this->phpbb_dispatcher = $phpbb_dispatcher;
 		$this->db = $db;
 		$this->cache = $cache;
+		$this->language = $language;
 		$this->user = $user;
 
-		$this->phpbb_root_path = $phpbb_root_path;
-		$this->php_ext = $php_ext;
-
 		$this->notification_types_table = $notification_types_table;
-		$this->notifications_table = $notifications_table;
 		$this->user_notifications_table = $user_notifications_table;
 	}
 
 	/**
-	* Load the user's notifications
+	* Load the user's notifications for a given method
 	*
+	* @param string $method_name
 	* @param array $options Optional options to control what notifications are loaded
 	*				notification_id		Notification id to load (or array of notification ids)
 	*				user_id				User id to load notifications for (Default: $user->data['user_id'])
@@ -123,27 +108,21 @@ class manager
 	*	'notifications'		array of notification type objects
 	*	'unread_count'		number of unread notifications the user has if count_unread is true in the options
 	*	'total_count'		number of notifications the user has if count_total is true in the options
+	* @throws \phpbb\notification\exception when the method doesn't refer to a class extending \phpbb\notification\method\method_interface
 	*/
-	public function load_notifications(array $options = array())
+	public function load_notifications($method_name, array $options = array())
 	{
-		// Merge default options
-		$options = array_merge(array(
-			'notification_id'	=> false,
-			'user_id'			=> $this->user->data['user_id'],
-			'order_by'			=> 'notification_time',
-			'order_dir'			=> 'DESC',
-			'limit'				=> 0,
-			'start'				=> 0,
-			'all_unread'		=> false,
-			'count_unread'		=> false,
-			'count_total'		=> false,
-		), $options);
-
-		// If all_unread, count_unread must be true
-		$options['count_unread'] = ($options['all_unread']) ? true : $options['count_unread'];
+		$method = $this->get_method_class($method_name);
 
-		// Anonymous users and bots never receive notifications
-		if ($options['user_id'] == $this->user->data['user_id'] && ($this->user->data['user_id'] == ANONYMOUS || $this->user->data['user_type'] == USER_IGNORE))
+		if (! $method instanceof \phpbb\notification\method\method_interface)
+		{
+			throw new \phpbb\notification\exception($this->language->lang('NOTIFICATION_METHOD_INVALID', $method_name));
+		}
+		else if ($method->is_available())
+		{
+			return $method->load_notifications($options);
+		}
+		else
 		{
 			return array(
 				'notifications'		=> array(),
@@ -151,172 +130,112 @@ class manager
 				'total_count'		=> 0,
 			);
 		}
+	}
 
-		$notifications = $user_ids = array();
-		$load_special = array();
-		$total_count = $unread_count = 0;
+	/**
+	 * Mark notifications read or unread for all available methods
+	 *
+	 * @param bool|string|array $notification_type_name Type identifier or array of item types (only acceptable if the $data is identical for the specified types). False to mark read for all item types
+	 * @param bool|int|array $item_id Item id or array of item ids. False to mark read for all item ids
+	 * @param bool|int|array $user_id User id or array of user ids. False to mark read for all user ids
+	 * @param bool|int $time Time at which to mark all notifications prior to as read. False to mark all as read. (Default: False)
+	 *
+	 * @deprecated since 3.2
+	 */
+	public function mark_notifications_read($notification_type_name, $item_id, $user_id, $time = false)
+	{
+		$this->mark_notifications($notification_type_name, $item_id, $user_id, $time);
+	}
 
-		if ($options['count_unread'])
+	/**
+	* Mark notifications read or unread for all available methods
+	*
+	* @param bool|string|array $notification_type_name Type identifier or array of item types (only acceptable if the $data is identical for the specified types). False to mark read for all item types
+	* @param bool|int|array $item_id Item id or array of item ids. False to mark read for all item ids
+	* @param bool|int|array $user_id User id or array of user ids. False to mark read for all user ids
+	* @param bool|int $time Time at which to mark all notifications prior to as read. False to mark all as read. (Default: False)
+	* @param bool $mark_read Define if the notification as to be set to True or False. (Default: True)
+	*/
+	public function mark_notifications($notification_type_name, $item_id, $user_id, $time = false, $mark_read = true)
+	{
+		if (is_array($notification_type_name))
 		{
-			// Get the total number of unread notifications
-			$sql = 'SELECT COUNT(n.notification_id) AS unread_count
-				FROM ' . $this->notifications_table . ' n, ' . $this->notification_types_table . ' nt
-				WHERE n.user_id = ' . (int) $options['user_id'] . '
-					AND n.notification_read = 0
-					AND nt.notification_type_id = n.notification_type_id
-					AND nt.notification_type_enabled = 1';
-			$result = $this->db->sql_query($sql);
-			$unread_count = (int) $this->db->sql_fetchfield('unread_count');
-			$this->db->sql_freeresult($result);
+			$notification_type_id = $this->get_notification_type_ids($notification_type_name);
 		}
-
-		if ($options['count_total'])
+		else if ($notification_type_name !== false)
 		{
-			// Get the total number of notifications
-			$sql = 'SELECT COUNT(n.notification_id) AS total_count
-				FROM ' . $this->notifications_table . ' n, ' . $this->notification_types_table . ' nt
-				WHERE n.user_id = ' . (int) $options['user_id'] . '
-					AND nt.notification_type_id = n.notification_type_id
-					AND nt.notification_type_enabled = 1';
-			$result = $this->db->sql_query($sql);
-			$total_count = (int) $this->db->sql_fetchfield('total_count');
-			$this->db->sql_freeresult($result);
+			$notification_type_id = $this->get_notification_type_id($notification_type_name);
 		}
-
-		if (!$options['count_total'] || $total_count)
+		else
 		{
-			$rowset = array();
-			$selected_unread_count = 0;
-
-			// Get the main notifications
-			$sql = 'SELECT n.*, nt.notification_type_name
-				FROM ' . $this->notifications_table . ' n, ' . $this->notification_types_table . ' nt
-				WHERE n.user_id = ' . (int) $options['user_id'] .
-					(($options['notification_id']) ? ' AND ' . $this->db->sql_in_set('n.notification_id', $options['notification_id']) : '') . '
-					AND nt.notification_type_id = n.notification_type_id
-					AND nt.notification_type_enabled = 1
-				ORDER BY n.' . $this->db->sql_escape($options['order_by']) . ' ' . $this->db->sql_escape($options['order_dir']);
-			$result = $this->db->sql_query_limit($sql, $options['limit'], $options['start']);
-
-			while ($row = $this->db->sql_fetchrow($result))
-			{
-				$rowset[$row['notification_id']] = $row;
-				$selected_unread_count += (int) !$row['notification_read'];
-			}
-			$this->db->sql_freeresult($result);
-
-			// Get all unread notifications
-			if ($selected_unread_count < $unread_count && $options['all_unread'] && !empty($rowset))
-			{
-				$sql = 'SELECT n.*, nt.notification_type_name
-				FROM ' . $this->notifications_table . ' n, ' . $this->notification_types_table . ' nt
-					WHERE n.user_id = ' . (int) $options['user_id'] . '
-						AND n.notification_read = 0
-						AND ' . $this->db->sql_in_set('n.notification_id', array_keys($rowset), true) . '
-						AND nt.notification_type_id = n.notification_type_id
-						AND nt.notification_type_enabled = 1
-					ORDER BY n.' . $this->db->sql_escape($options['order_by']) . ' ' . $this->db->sql_escape($options['order_dir']);
-				$result = $this->db->sql_query_limit($sql, $options['limit'], $options['start']);
-
-				while ($row = $this->db->sql_fetchrow($result))
-				{
-					$rowset[$row['notification_id']] = $row;
-				}
-				$this->db->sql_freeresult($result);
-			}
-
-			foreach ($rowset as $row)
-			{
-				$notification = $this->get_item_type_class($row['notification_type_name'], $row);
-
-				// Array of user_ids to query all at once
-				$user_ids = array_merge($user_ids, $notification->users_to_query());
-
-				// Some notification types also require querying additional tables themselves
-				if (!isset($load_special[$row['notification_type_name']]))
-				{
-					$load_special[$row['notification_type_name']] = array();
-				}
-				$load_special[$row['notification_type_name']] = array_merge($load_special[$row['notification_type_name']], $notification->get_load_special());
-
-				$notifications[$row['notification_id']] = $notification;
-			}
-
-			$this->user_loader->load_users($user_ids);
-
-			// Allow each type to load its own special items
-			foreach ($load_special as $item_type => $data)
-			{
-				$item_class = $this->get_item_type_class($item_type);
-
-				$item_class->load_special($data, $notifications);
-			}
+			$notification_type_id = false;
 		}
 
-		return array(
-			'notifications'		=> $notifications,
-			'unread_count'		=> $unread_count,
-			'total_count'		=> $total_count,
-		);
+		/** @var method\method_interface $method */
+		foreach ($this->get_available_subscription_methods() as $method)
+		{
+			$method->mark_notifications($notification_type_id, $item_id, $user_id, $time, $mark_read);
+		}
 	}
 
 	/**
-	* Mark notifications read
-	*
-	* @param bool|string|array $notification_type_name Type identifier or array of item types (only acceptable if the $data is identical for the specified types). False to mark read for all item types
-	* @param bool|int|array $item_id Item id or array of item ids. False to mark read for all item ids
-	* @param bool|int|array $user_id User id or array of user ids. False to mark read for all user ids
-	* @param bool|int $time Time at which to mark all notifications prior to as read. False to mark all as read. (Default: False)
-	*/
-	public function mark_notifications_read($notification_type_name, $item_id, $user_id, $time = false)
+	 * Mark notifications read or unread from a parent identifier for all available methods
+	 *
+	 * @param string|array $notification_type_name Type identifier or array of item types (only acceptable if the $data is identical for the specified types)
+	 * @param bool|int|array $item_parent_id Item parent id or array of item parent ids. False to mark read for all item parent ids
+	 * @param bool|int|array $user_id User id or array of user ids. False to mark read for all user ids
+	 * @param bool|int $time Time at which to mark all notifications prior to as read. False to mark all as read. (Default: False)
+	 *
+	 * @deprecated since 3.2
+	 */
+	public function mark_notifications_read_by_parent($notification_type_name, $item_parent_id, $user_id, $time = false)
 	{
-		$time = ($time !== false) ? $time : time();
-
-		$sql = 'UPDATE ' . $this->notifications_table . "
-			SET notification_read = 1
-			WHERE notification_time <= " . (int) $time .
-				(($notification_type_name !== false) ? ' AND ' . $this->db->sql_in_set('notification_type_id', $this->get_notification_type_ids($notification_type_name)) : '') .
-				(($user_id !== false) ? ' AND ' . $this->db->sql_in_set('user_id', $user_id) : '') .
-				(($item_id !== false) ? ' AND ' . $this->db->sql_in_set('item_id', $item_id) : '');
-		$this->db->sql_query($sql);
+		$this->mark_notifications_by_parent($notification_type_name, $item_parent_id, $user_id, $time);
 	}
 
 	/**
-	* Mark notifications read from a parent identifier
+	* Mark notifications read or unread from a parent identifier for all available methods
 	*
 	* @param string|array $notification_type_name Type identifier or array of item types (only acceptable if the $data is identical for the specified types)
 	* @param bool|int|array $item_parent_id Item parent id or array of item parent ids. False to mark read for all item parent ids
 	* @param bool|int|array $user_id User id or array of user ids. False to mark read for all user ids
 	* @param bool|int $time Time at which to mark all notifications prior to as read. False to mark all as read. (Default: False)
+	* @param bool $mark_read Define if the notification as to be set to True or False. (Default: True)
 	*/
-	public function mark_notifications_read_by_parent($notification_type_name, $item_parent_id, $user_id, $time = false)
+	public function mark_notifications_by_parent($notification_type_name, $item_parent_id, $user_id, $time = false, $mark_read = true)
 	{
-		$time = ($time !== false) ? $time : time();
-
-		$sql = 'UPDATE ' . $this->notifications_table . "
-			SET notification_read = 1
-			WHERE notification_time <= " . (int) $time .
-				(($notification_type_name !== false) ? ' AND ' . $this->db->sql_in_set('notification_type_id', $this->get_notification_type_ids($notification_type_name)) : '') .
-				(($item_parent_id !== false) ? ' AND ' . $this->db->sql_in_set('item_parent_id', $item_parent_id, false, true) : '') .
-				(($user_id !== false) ? ' AND ' . $this->db->sql_in_set('user_id', $user_id) : '');
-		$this->db->sql_query($sql);
+		if (is_array($notification_type_name))
+		{
+			$notification_type_id = $this->get_notification_type_ids($notification_type_name);
+		}
+		else
+		{
+			$notification_type_id = $this->get_notification_type_id($notification_type_name);
+		}
+
+		/** @var method\method_interface $method */
+		foreach ($this->get_available_subscription_methods() as $method)
+		{
+			$method->mark_notifications_by_parent($notification_type_id, $item_parent_id, $user_id, $time, $mark_read);
+		}
 	}
 
 	/**
-	* Mark notifications read
+	* Mark notifications read or unread for a given method
 	*
+	* @param string $method_name
 	* @param int|array $notification_id Notification id or array of notification ids.
 	* @param bool|int $time Time at which to mark all notifications prior to as read. False to mark all as read. (Default: False)
+	* @param bool $mark_read Define if the notification as to be set to True or False. (Default: True)
 	*/
-	public function mark_notifications_read_by_id($notification_id, $time = false)
+	public function mark_notifications_by_id($method_name, $notification_id, $time = false, $mark_read = true)
 	{
-		$time = ($time !== false) ? $time : time();
+		$method = $this->get_method_class($method_name);
 
-		$sql = 'UPDATE ' . $this->notifications_table . "
-			SET notification_read = 1
-			WHERE notification_time <= " . (int) $time . '
-				AND ' . $this->db->sql_in_set('notification_id', $notification_id);
-		$this->db->sql_query($sql);
+		if ($method instanceof \phpbb\notification\method\method_interface && $method->is_available())
+		{
+			$method->mark_notifications_by_id($notification_id, $time, $mark_read);
+		}
 	}
 
 	/**
@@ -350,8 +269,6 @@ class manager
 			return $notified_users;
 		}
 
-		$item_id = $this->get_item_type_class($notification_type_name)->get_item_id($data);
-
 		// find out which users want to receive this type of notification
 		$notify_users = $this->get_item_type_class($notification_type_name)->find_users_for_notification($data, $options);
 
@@ -404,27 +321,25 @@ class manager
 		$item_id = $this->get_item_type_class($notification_type_name)->get_item_id($data);
 
 		$user_ids = array();
-		$notification_objects = $notification_methods = array();
+		$notification_methods = array();
 
 		// Never send notifications to the anonymous user!
 		unset($notify_users[ANONYMOUS]);
 
 		// Make sure not to send new notifications to users who've already been notified about this item
 		// This may happen when an item was added, but now new users are able to see the item
-		$sql = 'SELECT n.user_id
-			FROM ' . $this->notifications_table . ' n, ' . $this->notification_types_table . ' nt
-			WHERE n.notification_type_id = ' . (int) $notification_type_id . '
-				AND n.item_id = ' . (int) $item_id . '
-				AND nt.notification_type_id = n.notification_type_id
-				AND nt.notification_type_enabled = 1';
-		$result = $this->db->sql_query($sql);
-		while ($row = $this->db->sql_fetchrow($result))
+		// We remove each user which was already notified by at least one method.
+		/** @var method\method_interface $method */
+		foreach ($this->get_subscription_methods_instances() as $method)
 		{
-			unset($notify_users[$row['user_id']]);
+			$notified_users = $method->get_notified_users($notification_type_id, array('item_id' => $item_id));
+			foreach ($notified_users as $user => $notifications)
+			{
+				unset($notify_users[$user]);
+			}
 		}
-		$this->db->sql_freeresult($result);
 
-		if (!sizeof($notify_users))
+		if (!count($notify_users))
 		{
 			return;
 		}
@@ -434,8 +349,6 @@ class manager
 		$pre_create_data = $notification->pre_create_insert_array($data, $notify_users);
 		unset($notification);
 
-		$insert_buffer = new \phpbb\db\sql_insert_buffer($this->db, $this->notifications_table);
-
 		// Go through each user so we can insert a row in the DB and then notify them by their desired means
 		foreach ($notify_users as $user => $methods)
 		{
@@ -443,8 +356,8 @@ class manager
 
 			$notification->user_id = (int) $user;
 
-			// Insert notification row using buffer.
-			$insert_buffer->insert($notification->create_insert_array($data, $pre_create_data));
+			// Generate the insert_array
+			$notification->create_insert_array($data, $pre_create_data);
 
 			// Users are needed to send notifications
 			$user_ids = array_merge($user_ids, $notification->users_to_query());
@@ -452,20 +365,15 @@ class manager
 			foreach ($methods as $method)
 			{
 				// setup the notification methods and add the notification to the queue
-				if ($method) // blank means we just insert it as a notification, but do not notify them by any other means
+				if (!isset($notification_methods[$method]))
 				{
-					if (!isset($notification_methods[$method]))
-					{
-						$notification_methods[$method] = $this->get_method_class($method);
-					}
-
-					$notification_methods[$method]->add_to_queue($notification);
+					$notification_methods[$method] = $this->get_method_class($method);
 				}
+
+				$notification_methods[$method]->add_to_queue($notification);
 			}
 		}
 
-		$insert_buffer->flush();
-
 		// We need to load all of the users to send notifications
 		$this->user_loader->load_users($user_ids);
 
@@ -477,12 +385,13 @@ class manager
 	}
 
 	/**
-	* Update a notification
+	* Update notification
 	*
 	* @param string|array $notification_type_name Type identifier or array of item types (only acceptable if the $data is identical for the specified types)
 	* @param array $data Data specific for this type that will be updated
+	* @param array $options
 	*/
-	public function update_notifications($notification_type_name, $data)
+	public function update_notifications($notification_type_name, array $data, array $options = array())
 	{
 		if (is_array($notification_type_name))
 		{
@@ -494,27 +403,28 @@ class manager
 			return;
 		}
 
-		$notification = $this->get_item_type_class($notification_type_name);
+		$this->update_notification($this->get_item_type_class($notification_type_name), $data, $options);
+	}
 
-		// Allow the notifications class to over-ride the update_notifications functionality
-		if (method_exists($notification, 'update_notifications'))
+	/**
+	* Update a notification
+	*
+	* @param \phpbb\notification\type\type_interface $notification The notification
+	* @param array $data Data specific for this type that will be updated
+	* @param array $options
+	*/
+	public function update_notification(\phpbb\notification\type\type_interface $notification, array $data, array $options = array())
+	{
+		if (empty($options))
 		{
-			// Return False to over-ride the rest of the update
-			if ($notification->update_notifications($data) === false)
-			{
-				return;
-			}
+			$options['item_id'] = $notification->get_item_id($data);
 		}
 
-		$notification_type_id = $this->get_notification_type_id($notification_type_name);
-		$item_id = $notification->get_item_id($data);
-		$update_array = $notification->create_update_array($data);
-
-		$sql = 'UPDATE ' . $this->notifications_table . '
-			SET ' . $this->db->sql_build_array('UPDATE', $update_array) . '
-			WHERE notification_type_id = ' . (int) $notification_type_id . '
-				AND item_id = ' . (int) $item_id;
-		$this->db->sql_query($sql);
+		/** @var method\method_interface $method */
+		foreach ($this->get_available_subscription_methods() as $method)
+		{
+			$method->update_notification($notification, $data, $options);
+		}
 	}
 
 	/**
@@ -523,14 +433,15 @@ class manager
 	* @param string|array $notification_type_name Type identifier or array of item types (only acceptable if the $item_id is identical for the specified types)
 	* @param int|array $item_id Identifier within the type (or array of ids)
 	* @param mixed $parent_id Parent identifier within the type (or array of ids), used in combination with item_id if specified (Default: false; not checked)
+	* @param mixed $user_id User id (Default: false; not checked)
 	*/
-	public function delete_notifications($notification_type_name, $item_id, $parent_id = false)
+	public function delete_notifications($notification_type_name, $item_id, $parent_id = false, $user_id = false)
 	{
 		if (is_array($notification_type_name))
 		{
 			foreach ($notification_type_name as $type)
 			{
-				$this->delete_notifications($type, $item_id, $parent_id);
+				$this->delete_notifications($type, $item_id, $parent_id, $user_id);
 			}
 
 			return;
@@ -538,11 +449,11 @@ class manager
 
 		$notification_type_id = $this->get_notification_type_id($notification_type_name);
 
-		$sql = 'DELETE FROM ' . $this->notifications_table . '
-			WHERE notification_type_id = ' . (int) $notification_type_id . '
-				AND ' . $this->db->sql_in_set('item_id', $item_id) .
-				(($parent_id !== false) ? ' AND ' . $this->db->sql_in_set('item_parent_id', $parent_id) : '');
-		$this->db->sql_query($sql);
+		/** @var method\method_interface $method */
+		foreach ($this->get_available_subscription_methods() as $method)
+		{
+			$method->delete_notifications($notification_type_id, $item_id, $parent_id, $user_id);
+		}
 	}
 
 	/**
@@ -558,14 +469,16 @@ class manager
 
 			foreach ($this->notification_types as $type_name => $data)
 			{
+				/** @var type\base $type */
 				$type = $this->get_item_type_class($type_name);
 
 				if ($type instanceof \phpbb\notification\type\type_interface && $type->is_available())
 				{
 					$options = array_merge(array(
-						'id' => $type->get_type(),
-						'lang' => 'NOTIFICATION_TYPE_' . strtoupper($type->get_type()),
-						'group' => 'NOTIFICATION_GROUP_MISCELLANEOUS',
+						'type'	=> $type,
+						'id'	=> $type->get_type(),
+						'lang'	=> 'NOTIFICATION_TYPE_' . strtoupper($type->get_type()),
+						'group'	=> 'NOTIFICATION_GROUP_MISCELLANEOUS',
 					), (($type::$notification_option !== false) ? $type::$notification_option : array()));
 
 					$this->subscription_types[$options['group']][$options['id']] = $options;
@@ -593,16 +506,56 @@ class manager
 	{
 		$subscription_methods = array();
 
+		/** @var method\method_interface $method */
+		foreach ($this->get_available_subscription_methods() as $method_name => $method)
+		{
+			$subscription_methods[$method_name] = array(
+				'method'	=> $method,
+				'id'		=> $method->get_type(),
+				'lang'		=> str_replace('.', '_', strtoupper($method->get_type())),
+			);
+		}
+
+		return $subscription_methods;
+	}
+
+	/**
+	* Get all of the subscription methods
+	*
+	* @return array Array of method's instances
+	*/
+	private function get_subscription_methods_instances()
+	{
+		$subscription_methods = array();
+
 		foreach ($this->notification_methods as $method_name => $data)
 		{
 			$method = $this->get_method_class($method_name);
 
-			if ($method instanceof \phpbb\notification\method\method_interface && $method->is_available())
+			if ($method instanceof \phpbb\notification\method\method_interface)
+			{
+				$subscription_methods[$method_name] = $method;
+			}
+		}
+
+		return $subscription_methods;
+	}
+
+	/**
+	* Get all of the available subscription methods
+	*
+	* @return array Array of method's instances
+	*/
+	private function get_available_subscription_methods()
+	{
+		$subscription_methods = array();
+
+		/** @var method\method_interface $method */
+		foreach ($this->get_subscription_methods_instances() as $method_name => $method)
+		{
+			if ($method->is_available())
 			{
-				$subscription_methods[$method_name] = array(
-					'id'		=> $method->get_type(),
-					'lang'		=> str_replace('.', '_', strtoupper($method->get_type())),
-				);
+				$subscription_methods[$method_name] = $method;
 			}
 		}
 
@@ -646,9 +599,10 @@ class manager
 	*/
 	public function get_global_subscriptions($user_id = false)
 	{
-		$user_id = ($user_id === false) ? $this->user->data['user_id'] : $user_id;
+		$user_id = $user_id ?: $this->user->data['user_id'];
 
 		$subscriptions = array();
+		$default_methods = $this->get_default_methods();
 
 		$user_notifications = $this->get_user_notifications($user_id);
 
@@ -656,29 +610,32 @@ class manager
 		{
 			foreach ($types as $id => $type)
 			{
-
-				if (empty($user_notifications[$id]))
-				{
-					// No rows at all, default to ''
-					$subscriptions[$id] = array('');
-				}
-				else
+				$type_subscriptions = $default_methods;
+				if (!empty($user_notifications[$id]))
 				{
 					foreach ($user_notifications[$id] as $user_notification)
 					{
+						$key = array_search($user_notification['method'], $type_subscriptions, true);
 						if (!$user_notification['notify'])
 						{
+							if ($key !== false)
+							{
+								unset($type_subscriptions[$key]);
+							}
+
 							continue;
 						}
-
-						if (!isset($subscriptions[$id]))
+						else if ($key === false)
 						{
-							$subscriptions[$id] = array();
+							$type_subscriptions[] = $user_notification['method'];
 						}
-
-						$subscriptions[$id][] = $user_notification['method'];
 					}
 				}
+
+				if (!empty($type_subscriptions))
+				{
+					$subscriptions[$id] = $type_subscriptions;
+				}
 			}
 		}
 
@@ -690,15 +647,20 @@ class manager
 	*
 	* @param string $item_type Type identifier of the subscription
 	* @param int $item_id The id of the item
-	* @param string $method The method of the notification e.g. '', 'email', or 'jabber'
+	* @param string $method The method of the notification e.g. 'board', 'email', or 'jabber'
+	*                       (if null a subscription will be added for all the defaults methods)
 	* @param bool|int $user_id The user_id to add the subscription for (bool false for current user)
 	*/
-	public function add_subscription($item_type, $item_id = 0, $method = '', $user_id = false)
+	public function add_subscription($item_type, $item_id = 0, $method = null, $user_id = false)
 	{
-		if ($method !== '')
+		if ($method === null)
 		{
-			// Make sure to subscribe them to the base subscription
-			$this->add_subscription($item_type, $item_id, '', $user_id);
+			foreach ($this->get_default_methods() as $method_name)
+			{
+				$this->add_subscription($item_type, $item_id, $method_name, $user_id);
+			}
+
+			return;
 		}
 
 		$user_id = ($user_id === false) ? $this->user->data['user_id'] : $user_id;
@@ -742,33 +704,23 @@ class manager
 	*
 	* @param string $item_type Type identifier of the subscription
 	* @param int $item_id The id of the item
-	* @param string $method The method of the notification e.g. '', 'email', or 'jabber'
+	* @param string $method The method of the notification e.g. 'board', 'email', or 'jabber'
 	* @param bool|int $user_id The user_id to add the subscription for (bool false for current user)
 	*/
-	public function delete_subscription($item_type, $item_id = 0, $method = '', $user_id = false)
+	public function delete_subscription($item_type, $item_id = 0, $method = null, $user_id = false)
 	{
-		$user_id = ($user_id === false) ? $this->user->data['user_id'] : $user_id;
-
-		// If no method, make sure that no other notification methods for this item are selected before deleting
-		if ($method === '')
+		if ($method === null)
 		{
-			$sql = 'SELECT COUNT(*) as num_notifications
-				FROM ' . $this->user_notifications_table . "
-				WHERE item_type = '" . $this->db->sql_escape($item_type) . "'
-					AND item_id = " . (int) $item_id . '
-					AND user_id = ' .(int) $user_id . "
-					AND method <> ''
-					AND notify = 1";
-			$this->db->sql_query($sql);
-			$num_notifications = $this->db->sql_fetchfield('num_notifications');
-			$this->db->sql_freeresult();
-
-			if ($num_notifications)
+			foreach ($this->get_default_methods() as $method_name)
 			{
-				return;
+				$this->delete_subscription($item_type, $item_id, $method_name, $user_id);
 			}
+
+			return;
 		}
 
+		$user_id = $user_id ?: $this->user->data['user_id'];
+
 		$sql = 'UPDATE ' . $this->user_notifications_table . "
 			SET notify = 0
 			WHERE item_type = '" . $this->db->sql_escape($item_type) . "'
@@ -828,15 +780,12 @@ class manager
 		{
 			$notification_type_id = $this->get_notification_type_id($notification_type_name);
 
-			$sql = 'DELETE FROM ' . $this->notifications_table . '
-				WHERE notification_type_id = ' . (int) $notification_type_id;
-			$this->db->sql_query($sql);
-
-			$sql = 'DELETE FROM ' . $this->notification_types_table . '
-				WHERE notification_type_id = ' . (int) $notification_type_id;
-			$this->db->sql_query($sql);
+			/** @var method\method_interface $method */
+			foreach ($this->get_available_subscription_methods() as $method)
+			{
+				$method->purge_notifications($notification_type_id);
+			}
 
-			$this->cache->destroy('notification_type_ids');
 		}
 		catch (\phpbb\notification\exception $e)
 		{
@@ -869,17 +818,40 @@ class manager
 	*/
 	public function prune_notifications($timestamp, $only_read = true)
 	{
-		$sql = 'DELETE FROM ' . $this->notifications_table . '
-			WHERE notification_time < ' . (int) $timestamp .
-				(($only_read) ? ' AND notification_read = 1' : '');
-		$this->db->sql_query($sql);
+		/** @var method\method_interface $method */
+		foreach ($this->get_available_subscription_methods() as $method)
+		{
+			$method->prune_notifications($timestamp, $only_read);
+		}
+	}
 
-		$this->config->set('read_notification_last_gc', time(), false);
+	/**
+	 * Helper to get the list of methods enabled by default
+	 *
+	 * @return method\method_interface[]
+	 */
+	public function get_default_methods()
+	{
+		$default_methods = array();
+
+		foreach ($this->notification_methods as $method)
+		{
+			if ($method->is_enabled_by_default() && $method->is_available())
+			{
+				$default_methods[] = $method->get_type();
+			}
+		}
+
+		return $default_methods;
 	}
 
 	/**
-	* Helper to get the notifications item type class and set it up
-	*/
+	 * Helper to get the notifications item type class and set it up
+	 *
+	 * @param string $notification_type_name
+	 * @param array  $data
+	 * @return type\type_interface
+	 */
 	public function get_item_type_class($notification_type_name, $data = array())
 	{
 		$item = $this->load_object($notification_type_name);
@@ -890,16 +862,22 @@ class manager
 	}
 
 	/**
-	* Helper to get the notifications method class and set it up
-	*/
+	 * Helper to get the notifications method class and set it up
+	 *
+	 * @param string $method_name
+	 * @return method\method_interface
+	 */
 	public function get_method_class($method_name)
 	{
 		return $this->load_object($method_name);
 	}
 
 	/**
-	* Helper to load objects (notification types/methods)
-	*/
+	 * Helper to load objects (notification types/methods)
+	 *
+	 * @param string $object_name
+	 * @return method\method_interface|type\type_interface
+	 */
 	protected function load_object($object_name)
 	{
 		$object = $this->phpbb_container->get($object_name);
@@ -921,32 +899,20 @@ class manager
 	*/
 	public function get_notification_type_id($notification_type_name)
 	{
-		$notification_type_ids = $this->cache->get('notification_type_ids');
-
-		$this->db->sql_transaction('begin');
-
-		if ($notification_type_ids === false)
+		$sql = 'SELECT notification_type_id, notification_type_name
+			FROM ' . $this->notification_types_table;
+		$result = $this->db->sql_query($sql, 604800); // cache for one week
+		while ($row = $this->db->sql_fetchrow($result))
 		{
-			$notification_type_ids = array();
-
-			$sql = 'SELECT notification_type_id, notification_type_name
-				FROM ' . $this->notification_types_table;
-			$result = $this->db->sql_query($sql);
-			while ($row = $this->db->sql_fetchrow($result))
-			{
-				$notification_type_ids[$row['notification_type_name']] = (int) $row['notification_type_id'];
-			}
-			$this->db->sql_freeresult($result);
-
-			$this->cache->put('notification_type_ids', $notification_type_ids);
+			$notification_type_ids[$row['notification_type_name']] = (int) $row['notification_type_id'];
 		}
+		$this->db->sql_freeresult($result);
 
 		if (!isset($notification_type_ids[$notification_type_name]))
 		{
 			if (!isset($this->notification_types[$notification_type_name]) && !isset($this->notification_types['notification.type.' . $notification_type_name]))
 			{
-				$this->db->sql_transaction('rollback');
-				throw new \phpbb\notification\exception($this->user->lang('NOTIFICATION_TYPE_NOT_EXIST', $notification_type_name));
+				throw new \phpbb\notification\exception('NOTIFICATION_TYPE_NOT_EXIST', array($notification_type_name));
 			}
 
 			$sql = 'INSERT INTO ' . $this->notification_types_table . ' ' . $this->db->sql_build_array('INSERT', array(
@@ -955,13 +921,13 @@ class manager
 			));
 			$this->db->sql_query($sql);
 
+			// expose new notification type ID for this request
 			$notification_type_ids[$notification_type_name] = (int) $this->db->sql_nextid();
 
-			$this->cache->put('notification_type_ids', $notification_type_ids);
+			// destroy cache, we have a new addition which we have to to load next time
+			$this->cache->destroy('sql', $this->notification_types_table);
 		}
 
-		$this->db->sql_transaction('commit');
-
 		return $notification_type_ids[$notification_type_name];
 	}
 
@@ -987,4 +953,26 @@ class manager
 
 		return $notification_type_ids;
 	}
+
+	/**
+	* Find the users which are already notified
+	*
+	* @param bool|string|array $notification_type_name Type identifier or array of item types (only acceptable if the $data is identical for the specified types). False to retrieve all item types
+	* @param array $options
+	* @return array The list of the notified users
+	*/
+	public function get_notified_users($notification_type_name, array $options)
+	{
+		$notification_type_id = $this->get_notification_type_id($notification_type_name);
+
+		$notified_users = array();
+
+		/** @var method\method_interface $method */
+		foreach ($this->get_available_subscription_methods() as $method)
+		{
+			$notified_users = $notified_users + $method->get_notified_users($notification_type_id, $options);
+		}
+
+		return $notified_users;
+	}
 }
diff --git a/phpBB/phpbb/notification/method/base.php b/phpBB/phpbb/notification/method/base.php
index 6ee1d2984a..4a183ca508 100644
--- a/phpBB/phpbb/notification/method/base.php
+++ b/phpBB/phpbb/notification/method/base.php
@@ -21,36 +21,6 @@ abstract class base implements \phpbb\notification\method\method_interface
 	/** @var \phpbb\notification\manager */
 	protected $notification_manager;
 
-	/** @var \phpbb\user_loader */
-	protected $user_loader;
-
-	/** @var \phpbb\db\driver\driver_interface */
-	protected $db;
-
-	/** @var \phpbb\cache\driver\driver_interface */
-	protected $cache;
-
-	/** @var \phpbb\template\template */
-	protected $template;
-
-	/** @var \phpbb\extension\manager */
-	protected $extension_manager;
-
-	/** @var \phpbb\user */
-	protected $user;
-
-	/** @var \phpbb\auth\auth */
-	protected $auth;
-
-	/** @var \phpbb\config\config */
-	protected $config;
-
-	/** @var string */
-	protected $phpbb_root_path;
-
-	/** @var string */
-	protected $php_ext;
-
 	/**
 	* Queue of messages to be sent
 	*
@@ -59,38 +29,43 @@ abstract class base implements \phpbb\notification\method\method_interface
 	protected $queue = array();
 
 	/**
-	* Notification Method Base Constructor
+	* Set notification manager (required)
 	*
-	* @param \phpbb\user_loader $user_loader
-	* @param \phpbb\db\driver\driver_interface $db
-	* @param \phpbb\cache\driver\driver_interface $cache
-	* @param \phpbb\user $user
-	* @param \phpbb\auth\auth $auth
-	* @param \phpbb\config\config $config
-	* @param string $phpbb_root_path
-	* @param string $php_ext
-	* @return \phpbb\notification\method\base
+	* @param \phpbb\notification\manager $notification_manager
 	*/
-	public function __construct(\phpbb\user_loader $user_loader, \phpbb\db\driver\driver_interface $db, \phpbb\cache\driver\driver_interface $cache, $user, \phpbb\auth\auth $auth, \phpbb\config\config $config, $phpbb_root_path, $php_ext)
+	public function set_notification_manager(\phpbb\notification\manager $notification_manager)
 	{
-		$this->user_loader = $user_loader;
-		$this->db = $db;
-		$this->cache = $cache;
-		$this->user = $user;
-		$this->auth = $auth;
-		$this->config = $config;
-		$this->phpbb_root_path = $phpbb_root_path;
-		$this->php_ext = $php_ext;
+		$this->notification_manager = $notification_manager;
 	}
 
 	/**
-	* Set notification manager (required)
+	* Is the method enable by default?
 	*
-	* @param \phpbb\notification\manager $notification_manager
+	* @return bool
 	*/
-	public function set_notification_manager(\phpbb\notification\manager $notification_manager)
+	public function is_enabled_by_default()
 	{
-		$this->notification_manager = $notification_manager;
+		return false;
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function get_notified_users($notification_type_id, array $options)
+	{
+		return array();
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function load_notifications(array $options = array())
+	{
+		return array(
+			'notifications'		=> array(),
+			'unread_count'		=> 0,
+			'total_count'		=> 0,
+		);
 	}
 
 	/**
@@ -104,6 +79,55 @@ abstract class base implements \phpbb\notification\method\method_interface
 	}
 
 	/**
+	* {@inheritdoc}
+	*/
+	public function update_notification($notification, array $data, array $options)
+	{
+	}
+
+	/**
+	* {@inheritdoc
+	*/
+	public function mark_notifications($notification_type_id, $item_id, $user_id, $time = false, $mark_read = true)
+	{
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function mark_notifications_by_parent($notification_type_id, $item_parent_id, $user_id, $time = false, $mark_read = true)
+	{
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function mark_notifications_by_id($notification_id, $time = false, $mark_read = true)
+	{
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function delete_notifications($notification_type_id, $item_id, $parent_id = false, $user_id = false)
+	{
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function prune_notifications($timestamp, $only_read = true)
+	{
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function purge_notifications($notification_type_id)
+	{
+	}
+
+	/**
 	* Empty the queue
 	*/
 	protected function empty_queue()
diff --git a/phpBB/phpbb/notification/method/board.php b/phpBB/phpbb/notification/method/board.php
new file mode 100644
index 0000000000..faa53576e0
--- /dev/null
+++ b/phpBB/phpbb/notification/method/board.php
@@ -0,0 +1,399 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\notification\method;
+
+/**
+* In Board notification method class
+* This class handles in board notifications. This method is enabled by default.
+*
+* @package notifications
+*/
+class board extends \phpbb\notification\method\base
+{
+	/** @var \phpbb\user_loader */
+	protected $user_loader;
+
+	/** @var \phpbb\db\driver\driver_interface */
+	protected $db;
+
+	/** @var \phpbb\cache\driver\driver_interface */
+	protected $cache;
+
+	/** @var \phpbb\user */
+	protected $user;
+
+	/** @var \phpbb\config\config */
+	protected $config;
+
+	/** @var string */
+	protected $notification_types_table;
+
+	/** @var string */
+	protected $notifications_table;
+
+	/**
+	* Notification Method Board Constructor
+	*
+	* @param \phpbb\user_loader $user_loader
+	* @param \phpbb\db\driver\driver_interface $db
+	* @param \phpbb\cache\driver\driver_interface $cache
+	* @param \phpbb\user $user
+	* @param \phpbb\config\config $config
+	* @param string $notification_types_table
+	* @param string $notifications_table
+	*/
+	public function __construct(\phpbb\user_loader $user_loader, \phpbb\db\driver\driver_interface $db, \phpbb\cache\driver\driver_interface $cache, \phpbb\user $user, \phpbb\config\config $config, $notification_types_table, $notifications_table)
+	{
+		$this->user_loader = $user_loader;
+		$this->db = $db;
+		$this->cache = $cache;
+		$this->user = $user;
+		$this->config = $config;
+		$this->notification_types_table = $notification_types_table;
+		$this->notifications_table = $notifications_table;
+
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function add_to_queue(\phpbb\notification\type\type_interface $notification)
+	{
+		$this->queue[] = $notification;
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function get_type()
+	{
+		return 'notification.method.board';
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function is_available()
+	{
+		return $this->config['allow_board_notifications'];
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function is_enabled_by_default()
+	{
+		return true;
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function get_notified_users($notification_type_id, array $options)
+	{
+		$notified_users = array();
+		$sql = 'SELECT n.*
+			FROM ' . $this->notifications_table . ' n, ' . $this->notification_types_table . ' nt
+			WHERE n.notification_type_id = ' . (int) $notification_type_id .
+			(isset($options['item_id']) ? ' AND n.item_id = ' . (int) $options['item_id'] : '') .
+			(isset($options['item_parent_id']) ? ' AND n.item_parent_id = ' . (int) $options['item_parent_id'] : '') .
+			(isset($options['user_id']) ? ' AND n.user_id = ' . (int) $options['user_id'] : '') .
+			(isset($options['read']) ? ' AND n.notification_read = ' . (int) $options['read'] : '') .'
+				AND nt.notification_type_id = n.notification_type_id
+				AND nt.notification_type_enabled = 1';
+		$result = $this->db->sql_query($sql);
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			$notified_users[$row['user_id']] = $row;
+		}
+		$this->db->sql_freeresult($result);
+
+		return $notified_users;
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function load_notifications(array $options = array())
+	{
+		// Merge default options
+		$options = array_merge(array(
+			'notification_id'	=> false,
+			'user_id'			=> $this->user->data['user_id'],
+			'order_by'			=> 'notification_time',
+			'order_dir'			=> 'DESC',
+			'limit'				=> 0,
+			'start'				=> 0,
+			'all_unread'		=> false,
+			'count_unread'		=> false,
+			'count_total'		=> false,
+		), $options);
+
+		// If all_unread, count_unread must be true
+		$options['count_unread'] = ($options['all_unread']) ? true : $options['count_unread'];
+
+		// Anonymous users and bots never receive notifications
+		if ($options['user_id'] == $this->user->data['user_id'] && ($this->user->data['user_id'] == ANONYMOUS || $this->user->data['user_type'] == USER_IGNORE))
+		{
+			return array(
+				'notifications'		=> array(),
+				'unread_count'		=> 0,
+				'total_count'		=> 0,
+			);
+		}
+
+		$notifications = $user_ids = array();
+		$load_special = array();
+		$total_count = $unread_count = 0;
+
+		if ($options['count_unread'])
+		{
+			// Get the total number of unread notifications
+			$sql = 'SELECT COUNT(n.notification_id) AS unread_count
+				FROM ' . $this->notifications_table . ' n, ' . $this->notification_types_table . ' nt
+				WHERE n.user_id = ' . (int) $options['user_id'] . '
+					AND n.notification_read = 0
+					AND nt.notification_type_id = n.notification_type_id
+					AND nt.notification_type_enabled = 1';
+			$result = $this->db->sql_query($sql);
+			$unread_count = (int) $this->db->sql_fetchfield('unread_count');
+			$this->db->sql_freeresult($result);
+		}
+
+		if ($options['count_total'])
+		{
+			// Get the total number of notifications
+			$sql = 'SELECT COUNT(n.notification_id) AS total_count
+				FROM ' . $this->notifications_table . ' n, ' . $this->notification_types_table . ' nt
+				WHERE n.user_id = ' . (int) $options['user_id'] . '
+					AND nt.notification_type_id = n.notification_type_id
+					AND nt.notification_type_enabled = 1';
+			$result = $this->db->sql_query($sql);
+			$total_count = (int) $this->db->sql_fetchfield('total_count');
+			$this->db->sql_freeresult($result);
+		}
+
+		if (!$options['count_total'] || $total_count)
+		{
+			$rowset = array();
+
+			// Get the main notifications
+			$sql = 'SELECT n.*, nt.notification_type_name
+				FROM ' . $this->notifications_table . ' n, ' . $this->notification_types_table . ' nt
+				WHERE n.user_id = ' . (int) $options['user_id'] .
+				(($options['notification_id']) ? ((is_array($options['notification_id'])) ? ' AND ' . $this->db->sql_in_set('n.notification_id', $options['notification_id']) : ' AND n.notification_id = ' . (int) $options['notification_id']) : '') . '
+					AND nt.notification_type_id = n.notification_type_id
+					AND nt.notification_type_enabled = 1
+				ORDER BY n.' . $this->db->sql_escape($options['order_by']) . ' ' . $this->db->sql_escape($options['order_dir']);
+			$result = $this->db->sql_query_limit($sql, $options['limit'], $options['start']);
+
+			while ($row = $this->db->sql_fetchrow($result))
+			{
+				$rowset[$row['notification_id']] = $row;
+			}
+			$this->db->sql_freeresult($result);
+
+			// Get all unread notifications
+			if ($unread_count && $options['all_unread'] && !empty($rowset))
+			{
+				$sql = 'SELECT n.*, nt.notification_type_name
+				FROM ' . $this->notifications_table . ' n, ' . $this->notification_types_table . ' nt
+					WHERE n.user_id = ' . (int) $options['user_id'] . '
+						AND n.notification_read = 0
+						AND ' . $this->db->sql_in_set('n.notification_id', array_keys($rowset), true) . '
+						AND nt.notification_type_id = n.notification_type_id
+						AND nt.notification_type_enabled = 1
+					ORDER BY n.' . $this->db->sql_escape($options['order_by']) . ' ' . $this->db->sql_escape($options['order_dir']);
+				$result = $this->db->sql_query_limit($sql, $options['limit'], $options['start']);
+
+				while ($row = $this->db->sql_fetchrow($result))
+				{
+					$rowset[$row['notification_id']] = $row;
+				}
+				$this->db->sql_freeresult($result);
+			}
+
+			foreach ($rowset as $row)
+			{
+				$notification = $this->notification_manager->get_item_type_class($row['notification_type_name'], $row);
+
+				// Array of user_ids to query all at once
+				$user_ids = array_merge($user_ids, $notification->users_to_query());
+
+				// Some notification types also require querying additional tables themselves
+				if (!isset($load_special[$row['notification_type_name']]))
+				{
+					$load_special[$row['notification_type_name']] = array();
+				}
+				$load_special[$row['notification_type_name']] = array_merge($load_special[$row['notification_type_name']], $notification->get_load_special());
+
+				$notifications[$row['notification_id']] = $notification;
+			}
+
+			$this->user_loader->load_users($user_ids);
+
+			// Allow each type to load its own special items
+			foreach ($load_special as $item_type => $data)
+			{
+				$item_class = $this->notification_manager->get_item_type_class($item_type);
+
+				$item_class->load_special($data, $notifications);
+			}
+		}
+
+		return array(
+			'notifications'		=> $notifications,
+			'unread_count'		=> $unread_count,
+			'total_count'		=> $total_count,
+		);
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function notify()
+	{
+		$insert_buffer = new \phpbb\db\sql_insert_buffer($this->db, $this->notifications_table);
+
+		/** @var \phpbb\notification\type\type_interface $notification */
+		foreach ($this->queue as $notification)
+		{
+			$data = $notification->get_insert_array();
+			$insert_buffer->insert($data);
+		}
+
+		$insert_buffer->flush();
+
+		// We're done, empty the queue
+		$this->empty_queue();
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function update_notification($notification, array $data, array $options)
+	{
+		// Allow the notifications class to over-ride the update_notifications functionality
+		if (method_exists($notification, 'update_notifications'))
+		{
+			// Return False to over-ride the rest of the update
+			if ($notification->update_notifications($data) === false)
+			{
+				return;
+			}
+		}
+
+		$notification_type_id = $this->notification_manager->get_notification_type_id($notification->get_type());
+		$update_array = $notification->create_update_array($data);
+
+		$sql = 'UPDATE ' . $this->notifications_table . '
+			SET ' . $this->db->sql_build_array('UPDATE', $update_array) . '
+			WHERE notification_type_id = ' . (int) $notification_type_id .
+			(isset($options['item_id']) ? ' AND item_id = ' . (int) $options['item_id'] : '') .
+			(isset($options['item_parent_id']) ? ' AND item_parent_id = ' . (int) $options['item_parent_id'] : '') .
+			(isset($options['user_id']) ? ' AND user_id = ' . (int) $options['user_id'] : '') .
+			(isset($options['read']) ? ' AND notification_read = ' . (int) $options['read'] : '');
+		$this->db->sql_query($sql);
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function mark_notifications($notification_type_id, $item_id, $user_id, $time = false, $mark_read = true)
+	{
+		$time = ($time !== false) ? $time : time();
+
+		$sql = 'UPDATE ' . $this->notifications_table . '
+			SET notification_read = ' . ($mark_read ? 1 : 0) . '
+			WHERE notification_time <= ' . (int) $time .
+			(($notification_type_id !== false) ? ' AND ' .
+				(is_array($notification_type_id) ? $this->db->sql_in_set('notification_type_id', $notification_type_id) : 'notification_type_id = ' . $notification_type_id) : '') .
+			(($user_id !== false) ? ' AND ' . (is_array($user_id) ? $this->db->sql_in_set('user_id', $user_id) : 'user_id = ' . (int) $user_id) : '') .
+			(($item_id !== false) ? ' AND ' . (is_array($item_id) ? $this->db->sql_in_set('item_id', $item_id) : 'item_id = ' . (int) $item_id) : '');
+		$this->db->sql_query($sql);
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function mark_notifications_by_parent($notification_type_id, $item_parent_id, $user_id, $time = false, $mark_read = true)
+	{
+		$time = ($time !== false) ? $time : time();
+
+		$sql = 'UPDATE ' . $this->notifications_table . '
+			SET notification_read = ' . ($mark_read ? 1 : 0) . '
+			WHERE notification_time <= ' . (int) $time .
+			(($notification_type_id !== false) ? ' AND ' .
+				(is_array($notification_type_id) ? $this->db->sql_in_set('notification_type_id', $notification_type_id) : 'notification_type_id = ' . $notification_type_id) : '') .
+			(($item_parent_id !== false) ? ' AND ' . (is_array($item_parent_id) ? $this->db->sql_in_set('item_parent_id', $item_parent_id, false, true) : 'item_parent_id = ' . (int) $item_parent_id) : '') .
+			(($user_id !== false) ? ' AND ' . (is_array($user_id) ? $this->db->sql_in_set('user_id', $user_id) : 'user_id = ' . (int) $user_id) : '');
+		$this->db->sql_query($sql);
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function mark_notifications_by_id($notification_id, $time = false, $mark_read = true)
+	{
+		$time = ($time !== false) ? $time : time();
+
+		$sql = 'UPDATE ' . $this->notifications_table . '
+			SET notification_read = ' . ($mark_read ? 1 : 0) . '
+			WHERE notification_time <= ' . (int) $time . '
+				AND ' . ((is_array($notification_id)) ? $this->db->sql_in_set('notification_id', $notification_id) : 'notification_id = ' . (int) $notification_id);
+		$this->db->sql_query($sql);
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function delete_notifications($notification_type_id, $item_id, $parent_id = false, $user_id = false)
+	{
+		$sql = 'DELETE FROM ' . $this->notifications_table . '
+			WHERE notification_type_id = ' . (int) $notification_type_id . '
+				AND ' . (is_array($item_id) ? $this->db->sql_in_set('item_id', $item_id) : 'item_id = ' . (int) $item_id) .
+			(($parent_id !== false) ? ' AND ' . ((is_array($parent_id) ? $this->db->sql_in_set('item_parent_id', $parent_id) : 'item_parent_id = ' . (int) $parent_id)) : '') .
+			(($user_id !== false) ? ' AND ' . ((is_array($user_id) ? $this->db->sql_in_set('user_id', $user_id) : 'user_id = ' . (int) $user_id)) : '');
+		$this->db->sql_query($sql);
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function prune_notifications($timestamp, $only_read = true)
+	{
+		$sql = 'DELETE FROM ' . $this->notifications_table . '
+			WHERE notification_time < ' . (int) $timestamp .
+			(($only_read) ? ' AND notification_read = 1' : '');
+		$this->db->sql_query($sql);
+
+		$this->config->set('read_notification_last_gc', time(), false);
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function purge_notifications($notification_type_id)
+	{
+		$sql = 'DELETE FROM ' . $this->notifications_table . '
+			WHERE notification_type_id = ' . (int) $notification_type_id;
+		$this->db->sql_query($sql);
+
+		$sql = 'DELETE FROM ' . $this->notification_types_table . '
+			WHERE notification_type_id = ' . (int) $notification_type_id;
+		$this->db->sql_query($sql);
+
+		$this->cache->destroy('sql', $this->notification_types_table);
+	}
+}
diff --git a/phpBB/phpbb/notification/method/email.php b/phpBB/phpbb/notification/method/email.php
index a4b93bc85c..6376d13dc7 100644
--- a/phpBB/phpbb/notification/method/email.php
+++ b/phpBB/phpbb/notification/method/email.php
@@ -13,6 +13,8 @@
 
 namespace phpbb\notification\method;
 
+use phpbb\notification\type\type_interface;
+
 /**
 * Email notification method class
 * This class handles sending emails for notifications
@@ -20,6 +22,29 @@ namespace phpbb\notification\method;
 
 class email extends \phpbb\notification\method\messenger_base
 {
+	/** @var \phpbb\user */
+	protected $user;
+
+	/** @var \phpbb\config\config */
+	protected $config;
+
+	/**
+	 * Notification Method email Constructor
+	 *
+	 * @param \phpbb\user_loader $user_loader
+	 * @param \phpbb\user $user
+	 * @param \phpbb\config\config $config
+	 * @param string $phpbb_root_path
+	 * @param string $php_ext
+	 */
+	public function __construct(\phpbb\user_loader $user_loader, \phpbb\user $user, \phpbb\config\config $config, $phpbb_root_path, $php_ext)
+	{
+		parent::__construct($user_loader, $phpbb_root_path, $php_ext);
+
+		$this->user = $user;
+		$this->config = $config;
+	}
+
 	/**
 	* Get notification method name
 	*
@@ -33,10 +58,14 @@ class email extends \phpbb\notification\method\messenger_base
 	/**
 	* Is this method available for the user?
 	* This is checked on the notifications options
+	*
+	* @param type_interface $notification_type  An optional instance of a notification type. If provided, this
+	*											method additionally checks if the type provides an email template.
+	* @return bool
 	*/
-	public function is_available()
+	public function is_available(type_interface $notification_type = null)
 	{
-		return $this->config['email_enable'] && $this->user->data['user_email'];
+		return parent::is_available($notification_type) && $this->config['email_enable'] && !empty($this->user->data['user_email']);
 	}
 
 	/**
diff --git a/phpBB/phpbb/notification/method/jabber.php b/phpBB/phpbb/notification/method/jabber.php
index 09f186e3ca..81fdb378e2 100644
--- a/phpBB/phpbb/notification/method/jabber.php
+++ b/phpBB/phpbb/notification/method/jabber.php
@@ -13,6 +13,8 @@
 
 namespace phpbb\notification\method;
 
+use phpbb\notification\type\type_interface;
+
 /**
 * Jabber notification method class
 * This class handles sending Jabber messages for notifications
@@ -20,6 +22,29 @@ namespace phpbb\notification\method;
 
 class jabber extends \phpbb\notification\method\messenger_base
 {
+	/** @var \phpbb\user */
+	protected $user;
+
+	/** @var \phpbb\config\config */
+	protected $config;
+
+	/**
+	 * Notification Method jabber Constructor
+	 *
+	 * @param \phpbb\user_loader $user_loader
+	 * @param \phpbb\user $user
+	 * @param \phpbb\config\config $config
+	 * @param string $phpbb_root_path
+	 * @param string $php_ext
+	 */
+	public function __construct(\phpbb\user_loader $user_loader, \phpbb\user $user, \phpbb\config\config $config, $phpbb_root_path, $php_ext)
+	{
+		parent::__construct($user_loader, $phpbb_root_path, $php_ext);
+
+		$this->user = $user;
+		$this->config = $config;
+	}
+
 	/**
 	* Get notification method name
 	*
@@ -33,10 +58,14 @@ class jabber extends \phpbb\notification\method\messenger_base
 	/**
 	* Is this method available for the user?
 	* This is checked on the notifications options
+	*
+	* @param type_interface $notification_type	An optional instance of a notification type. If provided, this
+	*											method additionally checks if the type provides an email template.
+	* @return bool
 	*/
-	public function is_available()
+	public function is_available(type_interface $notification_type = null)
 	{
-		return ($this->global_available() && $this->user->data['user_jabber']);
+		return parent::is_available($notification_type) && $this->global_available() && $this->user->data['user_jabber'];
 	}
 
 	/**
@@ -61,6 +90,6 @@ class jabber extends \phpbb\notification\method\messenger_base
 			return;
 		}
 
-		return $this->notify_using_messenger(NOTIFY_IM, 'short/');
+		$this->notify_using_messenger(NOTIFY_IM, 'short/');
 	}
 }
diff --git a/phpBB/phpbb/notification/method/messenger_base.php b/phpBB/phpbb/notification/method/messenger_base.php
index 0bfbfd6b02..f82017b70e 100644
--- a/phpBB/phpbb/notification/method/messenger_base.php
+++ b/phpBB/phpbb/notification/method/messenger_base.php
@@ -13,12 +13,50 @@
 
 namespace phpbb\notification\method;
 
+use phpbb\notification\type\type_interface;
+
 /**
 * Abstract notification method handling email and jabber notifications
 * using the phpBB messenger.
 */
 abstract class messenger_base extends \phpbb\notification\method\base
 {
+	/** @var \phpbb\user_loader */
+	protected $user_loader;
+
+	/** @var string */
+	protected $phpbb_root_path;
+
+	/** @var string */
+	protected $php_ext;
+
+	/**
+	 * Notification Method Board Constructor
+	 *
+	 * @param \phpbb\user_loader $user_loader
+	 * @param string $phpbb_root_path
+	 * @param string $php_ext
+	 */
+	public function __construct(\phpbb\user_loader $user_loader, $phpbb_root_path, $php_ext)
+	{
+		$this->user_loader = $user_loader;
+		$this->phpbb_root_path = $phpbb_root_path;
+		$this->php_ext = $php_ext;
+	}
+
+	/**
+	* Is this method available for the user?
+	* This is checked on the notifications options
+	*
+	* @param type_interface $notification_type	An optional instance of a notification type. This method returns false
+	*											only if the type is provided and if it doesn't provide an email template.
+	* @return bool
+	*/
+	public function is_available(type_interface $notification_type = null)
+	{
+		return $notification_type === null || $notification_type->get_email_template() !== false;
+	}
+
 	/**
 	* Notify using phpBB messenger
 	*
@@ -49,7 +87,7 @@ abstract class messenger_base extends \phpbb\notification\method\base
 		$banned_users = phpbb_get_banned_user_ids($user_ids);
 
 		// Load all the users we need
-		$this->user_loader->load_users($user_ids);
+		$this->user_loader->load_users(array_diff($user_ids, $banned_users), array(USER_IGNORE));
 
 		// Load the messenger
 		if (!class_exists('messenger'))
@@ -57,9 +95,9 @@ abstract class messenger_base extends \phpbb\notification\method\base
 			include($this->phpbb_root_path . 'includes/functions_messenger.' . $this->php_ext);
 		}
 		$messenger = new \messenger();
-		$board_url = generate_board_url();
 
 		// Time to go through the queue and send emails
+		/** @var \phpbb\notification\type\type_interface $notification */
 		foreach ($this->queue as $notification)
 		{
 			if ($notification->get_email_template() === false)
@@ -69,7 +107,7 @@ abstract class messenger_base extends \phpbb\notification\method\base
 
 			$user = $this->user_loader->get_user($notification->user_id);
 
-			if ($user['user_type'] == USER_IGNORE || ($user['user_type'] == USER_INACTIVE && $user['user_inactive_reason'] == INACTIVE_MANUAL) || in_array($notification->user_id, $banned_users))
+			if ($user['user_type'] == USER_INACTIVE && $user['user_inactive_reason'] == INACTIVE_MANUAL)
 			{
 				continue;
 			}
diff --git a/phpBB/phpbb/notification/method/method_interface.php b/phpBB/phpbb/notification/method/method_interface.php
index 76b0de179c..c2e4940485 100644
--- a/phpBB/phpbb/notification/method/method_interface.php
+++ b/phpBB/phpbb/notification/method/method_interface.php
@@ -26,12 +26,48 @@ interface method_interface
 	public function get_type();
 
 	/**
+	* Is the method enable by default?
+	*
+	* @return bool
+	*/
+	public function is_enabled_by_default();
+
+	/**
 	* Is this method available for the user?
 	* This is checked on the notifications options
 	*/
 	public function is_available();
 
 	/**
+	* Return the list of the users already notified
+	*
+	* @param int $notification_type_id Type of the notification
+	* @param array $options
+	* @return array User
+	*/
+	public function get_notified_users($notification_type_id, array $options);
+
+	/**
+	* Load the user's notifications
+	*
+	* @param array $options Optional options to control what notifications are loaded
+	*				notification_id		Notification id to load (or array of notification ids)
+	*				user_id				User id to load notifications for (Default: $user->data['user_id'])
+	*				order_by			Order by (Default: notification_time)
+	*				order_dir			Order direction (Default: DESC)
+	* 				limit				Number of notifications to load (Default: 5)
+	* 				start				Notifications offset (Default: 0)
+	* 				all_unread			Load all unread notifications? If set to true, count_unread is set to true (Default: false)
+	* 				count_unread		Count all unread notifications? (Default: false)
+	* 				count_total			Count all notifications? (Default: false)
+	* @return array Array of information based on the request with keys:
+	*	'notifications'		array of notification type objects
+	*	'unread_count'		number of unread notifications the user has if count_unread is true in the options
+	*	'total_count'		number of notifications the user has if count_total is true in the options
+	*/
+	public function load_notifications(array $options = array());
+
+	/**
 	* Add a notification to the queue
 	*
 	* @param \phpbb\notification\type\type_interface $notification
@@ -42,4 +78,72 @@ interface method_interface
 	* Parse the queue and notify the users
 	*/
 	public function notify();
+
+	/**
+	* Update a notification
+	*
+	* @param \phpbb\notification\type\type_interface $notification Notification to update
+	* @param array $data Data specific for this type that will be updated
+	* @param array $options
+	*/
+	public function update_notification($notification, array $data, array $options);
+
+	/**
+	* Mark notifications read or unread
+	*
+	* @param bool|string $notification_type_id Type identifier of item types. False to mark read for all item types
+	* @param bool|int|array $item_id Item id or array of item ids. False to mark read for all item ids
+	* @param bool|int|array $user_id User id or array of user ids. False to mark read for all user ids
+	* @param bool|int $time Time at which to mark all notifications prior to as read. False to mark all as read. (Default: False)
+	* @param bool $mark_read Define if the notification as to be set to True or False. (Default: True)
+	*/
+	public function mark_notifications($notification_type_id, $item_id, $user_id, $time = false, $mark_read = true);
+
+	/**
+	* Mark notifications read or unread from a parent identifier
+	*
+	* @param string $notification_type_id Type identifier of item types
+	* @param bool|int|array $item_parent_id Item parent id or array of item parent ids. False to mark read for all item parent ids
+	* @param bool|int|array $user_id User id or array of user ids. False to mark read for all user ids
+	* @param bool|int $time Time at which to mark all notifications prior to as read. False to mark all as read. (Default: False)
+	* @param bool $mark_read Define if the notification as to be set to True or False. (Default: True)
+	*/
+	public function mark_notifications_by_parent($notification_type_id, $item_parent_id, $user_id, $time = false, $mark_read = true);
+
+	/**
+	* Mark notifications read or unread
+	*
+	* @param int $notification_id Notification id of notification ids.
+	* @param bool|int $time Time at which to mark all notifications prior to as read. False to mark all as read. (Default: False)
+	* @param bool $mark_read Define if the notification as to be set to True or False. (Default: True)
+	*/
+	public function mark_notifications_by_id($notification_id, $time = false, $mark_read = true);
+
+	/**
+	* Delete a notification
+	*
+	* @param string $notification_type_id Type identifier of item types
+	* @param int|array $item_id Identifier within the type (or array of ids)
+	* @param mixed $parent_id Parent identifier within the type (or array of ids), used in combination with item_id if specified (Default: false; not checked)
+	* @param mixed $user_id User id (Default: false; not checked)
+	*/
+	public function delete_notifications($notification_type_id, $item_id, $parent_id = false, $user_id = false);
+
+	/**
+	* Delete all notifications older than a certain time
+	*
+	* @param int $timestamp Unix timestamp to delete all notifications that were created before
+	* @param bool $only_read True (default) to only prune read notifications
+	*/
+	public function prune_notifications($timestamp, $only_read = true);
+
+	/**
+	* Purge all notifications of a certain type
+	*
+	* This should be called when an extension which has notification types
+	* is purged so that all those notifications are removed
+	*
+	* @param string $notification_type_id Type identifier of the subscription
+	*/
+	public function purge_notifications($notification_type_id);
 }
diff --git a/phpBB/phpbb/notification/type/admin_activate_user.php b/phpBB/phpbb/notification/type/admin_activate_user.php
index 7c5c18aa47..78c10ac36a 100644
--- a/phpBB/phpbb/notification/type/admin_activate_user.php
+++ b/phpBB/phpbb/notification/type/admin_activate_user.php
@@ -36,11 +36,27 @@ class admin_activate_user extends \phpbb\notification\type\base
 	/**
 	* {@inheritdoc}
 	*/
-	public static $notification_option = array(
+	static public $notification_option = array(
 		'lang'	=> 'NOTIFICATION_TYPE_ADMIN_ACTIVATE_USER',
 		'group'	=> 'NOTIFICATION_GROUP_ADMINISTRATION',
 	);
 
+	/** @var \phpbb\user_loader */
+	protected $user_loader;
+
+	/** @var \phpbb\config\config */
+	protected $config;
+
+	public function set_config(\phpbb\config\config $config)
+	{
+		$this->config = $config;
+	}
+
+	public function set_user_loader(\phpbb\user_loader $user_loader)
+	{
+		$this->user_loader = $user_loader;
+	}
+
 	/**
 	* {@inheritdoc}
 	*/
@@ -52,7 +68,7 @@ class admin_activate_user extends \phpbb\notification\type\base
 	/**
 	* {@inheritdoc}
 	*/
-	public static function get_item_id($user)
+	static public function get_item_id($user)
 	{
 		return (int) $user['user_id'];
 	}
@@ -60,7 +76,7 @@ class admin_activate_user extends \phpbb\notification\type\base
 	/**
 	* {@inheritdoc}
 	*/
-	public static function get_item_parent_id($post)
+	static public function get_item_parent_id($post)
 	{
 		return 0;
 	}
@@ -114,7 +130,7 @@ class admin_activate_user extends \phpbb\notification\type\base
 	{
 		$username = $this->user_loader->get_username($this->item_id, 'no_profile');
 
-		return $this->user->lang($this->language_key, $username);
+		return $this->language->lang($this->language_key, $username);
 	}
 
 	/**
@@ -159,11 +175,11 @@ class admin_activate_user extends \phpbb\notification\type\base
 	/**
 	* {@inheritdoc}
 	*/
-	public function create_insert_array($user, $pre_create_data)
+	public function create_insert_array($user, $pre_create_data = array())
 	{
 		$this->set_data('user_actkey', $user['user_actkey']);
 		$this->notification_time = $user['user_regdate'];
 
-		return parent::create_insert_array($user, $pre_create_data);
+		parent::create_insert_array($user, $pre_create_data);
 	}
 }
diff --git a/phpBB/phpbb/notification/type/approve_post.php b/phpBB/phpbb/notification/type/approve_post.php
index 5760c12166..e4b111e4da 100644
--- a/phpBB/phpbb/notification/type/approve_post.php
+++ b/phpBB/phpbb/notification/type/approve_post.php
@@ -50,7 +50,7 @@ class approve_post extends \phpbb\notification\type\post
 	* @var bool|array False if the service should use it's default data
 	* 					Array of data (including keys 'id', 'lang', and 'group')
 	*/
-	public static $notification_option = array(
+	static public $notification_option = array(
 		'id'	=> 'moderation_queue',
 		'lang'	=> 'NOTIFICATION_TYPE_MODERATION_QUEUE',
 		'group'	=> 'NOTIFICATION_GROUP_POSTING',
@@ -79,7 +79,7 @@ class approve_post extends \phpbb\notification\type\post
 		), $options);
 
 		$users = array();
-		$users[$post['poster_id']] = array('');
+		$users[$post['poster_id']] = $this->notification_manager->get_default_methods();
 
 		return $this->get_authorised_recipients(array_keys($users), $post['forum_id'], array_merge($options, array(
 			'item_type'		=> static::$notification_option['id'],
@@ -107,21 +107,24 @@ class approve_post extends \phpbb\notification\type\post
 	}
 
 	/**
-	* Function for preparing the data for insertion in an SQL query
-	* (The service handles insertion)
-	*
-	* @param array $post Data from submit_post
-	* @param array $pre_create_data Data from pre_create_insert_array()
-	*
-	* @return array Array of data ready to be inserted into the database
+	* {@inheritdoc}
 	*/
 	public function create_insert_array($post, $pre_create_data = array())
 	{
 		$this->set_data('post_subject', $post['post_subject']);
 
-		$data = parent::create_insert_array($post, $pre_create_data);
+		parent::create_insert_array($post, $pre_create_data);
+
+		$this->notification_time = time();
+	}
 
-		$this->notification_time = $data['notification_time'] = time();
+	/**
+	* {@inheritdoc}
+	*/
+	public function get_insert_array()
+	{
+		$data = parent::get_insert_array();
+		$data['notification_time'] = $this->notification_time;
 
 		return $data;
 	}
diff --git a/phpBB/phpbb/notification/type/approve_topic.php b/phpBB/phpbb/notification/type/approve_topic.php
index 26e51bf9cd..f8a3fdec6f 100644
--- a/phpBB/phpbb/notification/type/approve_topic.php
+++ b/phpBB/phpbb/notification/type/approve_topic.php
@@ -50,7 +50,7 @@ class approve_topic extends \phpbb\notification\type\topic
 	* @var bool|array False if the service should use it's default data
 	* 					Array of data (including keys 'id', 'lang', and 'group')
 	*/
-	public static $notification_option = array(
+	static public $notification_option = array(
 		'id'	=> 'moderation_queue',
 		'lang'	=> 'NOTIFICATION_TYPE_MODERATION_QUEUE',
 		'group'	=> 'NOTIFICATION_GROUP_POSTING',
@@ -79,7 +79,7 @@ class approve_topic extends \phpbb\notification\type\topic
 		), $options);
 
 		$users = array();
-		$users[$post['poster_id']] = array('');
+		$users[$post['poster_id']] = $this->notification_manager->get_default_methods();
 
 		return $this->get_authorised_recipients(array_keys($users), $post['forum_id'], array_merge($options, array(
 			'item_type'		=> static::$notification_option['id'],
@@ -107,19 +107,23 @@ class approve_topic extends \phpbb\notification\type\topic
 	}
 
 	/**
-	* Function for preparing the data for insertion in an SQL query
-	* (The service handles insertion)
-	*
-	* @param array $post Data from submit_post
-	* @param array $pre_create_data Data from pre_create_insert_array()
-	*
-	* @return array Array of data ready to be inserted into the database
+	* {@inheritdoc}
 	*/
 	public function create_insert_array($post, $pre_create_data = array())
 	{
-		$data = parent::create_insert_array($post, $pre_create_data);
 
-		$this->notification_time = $data['notification_time'] = time();
+		parent::create_insert_array($post, $pre_create_data);
+
+		$this->notification_time = time();
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function get_insert_array()
+	{
+		$data = parent::get_insert_array();
+		$data['notification_time'] = $this->notification_time;
 
 		return $data;
 	}
diff --git a/phpBB/phpbb/notification/type/base.php b/phpBB/phpbb/notification/type/base.php
index 4ead06071e..77ed7f2b09 100644
--- a/phpBB/phpbb/notification/type/base.php
+++ b/phpBB/phpbb/notification/type/base.php
@@ -21,17 +21,11 @@ abstract class base implements \phpbb\notification\type\type_interface
 	/** @var \phpbb\notification\manager */
 	protected $notification_manager;
 
-	/** @var \phpbb\user_loader */
-	protected $user_loader;
-
 	/** @var \phpbb\db\driver\driver_interface */
 	protected $db;
 
-	/** @var \phpbb\cache\driver\driver_interface */
-	protected $cache;
-
-	/** @var \phpbb\template\template */
-	protected $template;
+	/** @var \phpbb\language\language */
+	protected $language;
 
 	/** @var \phpbb\user */
 	protected $user;
@@ -39,9 +33,6 @@ abstract class base implements \phpbb\notification\type\type_interface
 	/** @var \phpbb\auth\auth */
 	protected $auth;
 
-	/** @var \phpbb\config\config */
-	protected $config;
-
 	/** @var string */
 	protected $phpbb_root_path;
 
@@ -49,12 +40,6 @@ abstract class base implements \phpbb\notification\type\type_interface
 	protected $php_ext;
 
 	/** @var string */
-	protected $notification_types_table;
-
-	/** @var string */
-	protected $notifications_table;
-
-	/** @var string */
 	protected $user_notifications_table;
 
 	/**
@@ -63,7 +48,7 @@ abstract class base implements \phpbb\notification\type\type_interface
 	* @var bool|array False if the service should use its default data
 	* 					Array of data (including keys 'id', 'lang', and 'group')
 	*/
-	public static $notification_option = false;
+	static public $notification_option = false;
 
 	/**
 	* The notification_type_id, set upon creation of the class
@@ -74,7 +59,7 @@ abstract class base implements \phpbb\notification\type\type_interface
 	protected $notification_type_id;
 
 	/**
-	* Indentification data
+	* Identification data
 	* notification_type_id	- ID of the item type (auto generated, from notification types table)
 	* item_id				- ID of the item (e.g. post_id, msg_id)
 	* item_parent_id		- Parent item id (ex: for topic => forum_id, for post => topic_id, etc)
@@ -89,35 +74,26 @@ abstract class base implements \phpbb\notification\type\type_interface
 	private $data = array();
 
 	/**
-	* Notification Type Base Constructor
-	*
-	* @param \phpbb\user_loader $user_loader
-	* @param \phpbb\db\driver\driver_interface $db
-	* @param \phpbb\cache\driver\driver_interface $cache
-	* @param \phpbb\user $user
-	* @param \phpbb\auth\auth $auth
-	* @param \phpbb\config\config $config
-	* @param string $phpbb_root_path
-	* @param string $php_ext
-	* @param string $notification_types_table
-	* @param string $notifications_table
-	* @param string $user_notifications_table
-	* @return \phpbb\notification\type\base
-	*/
-	public function __construct(\phpbb\user_loader $user_loader, \phpbb\db\driver\driver_interface $db, \phpbb\cache\driver\driver_interface $cache, $user, \phpbb\auth\auth $auth, \phpbb\config\config $config, $phpbb_root_path, $php_ext, $notification_types_table, $notifications_table, $user_notifications_table)
+	 * Notification Type Base Constructor
+	 *
+	 * @param \phpbb\db\driver\driver_interface $db
+	 * @param \phpbb\language\language          $language
+	 * @param \phpbb\user                       $user
+	 * @param \phpbb\auth\auth                  $auth
+	 * @param string                            $phpbb_root_path
+	 * @param string                            $php_ext
+	 * @param string                            $user_notifications_table
+	 */
+	public function __construct(\phpbb\db\driver\driver_interface $db, \phpbb\language\language $language, \phpbb\user $user, \phpbb\auth\auth $auth, $phpbb_root_path, $php_ext, $user_notifications_table)
 	{
-		$this->user_loader = $user_loader;
 		$this->db = $db;
-		$this->cache = $cache;
+		$this->language = $language;
 		$this->user = $user;
 		$this->auth = $auth;
-		$this->config = $config;
 
 		$this->phpbb_root_path = $phpbb_root_path;
 		$this->php_ext = $php_ext;
 
-		$this->notification_types_table = $notification_types_table;
-		$this->notifications_table = $notifications_table;
 		$this->user_notifications_table = $user_notifications_table;
 	}
 
@@ -207,12 +183,7 @@ abstract class base implements \phpbb\notification\type\type_interface
 	}
 
 	/**
-	* Function for preparing the data for insertion in an SQL query
-	* (The service handles insertion)
-	*
-	* @param array $type_data Data unique to this notification type
-	* @param array $pre_create_data Data from pre_create_insert_array()
-	* @return array Array of data ready to be inserted into the database
+	* {@inheritdoc}
 	*/
 	public function create_insert_array($type_data, $pre_create_data = array())
 	{
@@ -225,9 +196,15 @@ abstract class base implements \phpbb\notification\type\type_interface
 			'notification_time'		=> time(),
 			'notification_read'		=> false,
 
-			'notification_data'					=> array(),
+			'notification_data'		=> array(),
 		), $this->data);
+	}
 
+	/**
+	* {@inheritdoc}
+	*/
+	public function get_insert_array()
+	{
 		$data = $this->data;
 
 		$data['notification_data'] = serialize($data['notification_data']);
@@ -244,7 +221,8 @@ abstract class base implements \phpbb\notification\type\type_interface
 	*/
 	public function create_update_array($type_data)
 	{
-		$data = $this->create_insert_array($type_data);
+		$this->create_insert_array($type_data);
+		$data = $this->get_insert_array();
 
 		// Unset data unique to each row
 		unset(
@@ -330,6 +308,7 @@ abstract class base implements \phpbb\notification\type\type_interface
 	* URL to unsubscribe to this notification (fall back)
 	*
 	* @param string|bool $method Method name to unsubscribe from (email|jabber|etc), False to unsubscribe from all notifications for this item
+	* @return false
 	*/
 	public function get_unsubscribe_url($method = false)
 	{
@@ -397,8 +376,11 @@ abstract class base implements \phpbb\notification\type\type_interface
 	}
 
 	/**
-	* Load the special items (fall back)
-	*/
+	 * Load the special items (fall back)
+	 *
+	 * @param array $data
+	 * @param array $notifications
+	 */
 	public function load_special($data, $notifications)
 	{
 		return;
@@ -415,10 +397,12 @@ abstract class base implements \phpbb\notification\type\type_interface
 	}
 
 	/**
-	* Pre create insert array function (fall back)
-	*
-	* @return array
-	*/
+	 * Pre create insert array function (fall back)
+	 *
+	 * @param array $type_data
+	 * @param array $notify_users
+	 * @return array
+	 */
 	public function pre_create_insert_array($type_data, $notify_users)
 	{
 		return array();
@@ -429,13 +413,13 @@ abstract class base implements \phpbb\notification\type\type_interface
 	*/
 
 	/**
-	* Find the users who want to receive notifications (helper)
-	*
-	* @param array $user_ids User IDs to check if they want to receive notifications
-	* 		(Bool False to check all users besides anonymous and bots (USER_IGNORE))
-	*
-	* @return array
-	*/
+	 * Find the users who want to receive notifications (helper)
+	 *
+	 * @param array|bool $user_ids User IDs to check if they want to receive notifications
+	 *                             (Bool False to check all users besides anonymous and bots (USER_IGNORE))
+	 * @param array      $options
+	 * @return array
+	 */
 	protected function check_user_notification_options($user_ids = false, $options = array())
 	{
 		$options = array_merge(array(
@@ -465,7 +449,7 @@ abstract class base implements \phpbb\notification\type\type_interface
 			return array();
 		}
 
-		$rowset = $resulting_user_ids = array();
+		$rowset = $output = array();
 
 		$sql = 'SELECT user_id, method, notify
 			FROM ' . $this->user_notifications_table . '
@@ -476,9 +460,7 @@ abstract class base implements \phpbb\notification\type\type_interface
 
 		while ($row = $this->db->sql_fetchrow($result))
 		{
-			$resulting_user_ids[] = $row['user_id'];
-
-			if (!$row['notify'] || (isset($options['ignore_users'][$row['user_id']]) && in_array($row['method'], $options['ignore_users'][$row['user_id']])))
+			if (isset($options['ignore_users'][$row['user_id']]) && in_array($row['method'], $options['ignore_users'][$row['user_id']]))
 			{
 				continue;
 			}
@@ -487,22 +469,47 @@ abstract class base implements \phpbb\notification\type\type_interface
 			{
 				$rowset[$row['user_id']] = array();
 			}
+			$rowset[$row['user_id']][$row['method']] = $row['notify'];
 
-			$rowset[$row['user_id']][] = $row['method'];
+			if (!isset($output[$row['user_id']]))
+			{
+				$output[$row['user_id']] = array();
+			}
+			if ($row['notify'])
+			{
+				$output[$row['user_id']][] = $row['method'];
+			}
 		}
 
 		$this->db->sql_freeresult($result);
 
+		$default_methods = $this->notification_manager->get_default_methods();
+
 		foreach ($user_ids as $user_id)
 		{
-			if (!in_array($user_id, $resulting_user_ids) && !isset($options['ignore_users'][$user_id]))
+			if (isset($options['ignore_users'][$user_id]))
+			{
+				continue;
+			}
+			if (!array_key_exists($user_id, $rowset))
+			{
+				// No rows at all for this user, use the default methods
+				$output[$user_id] = $default_methods;
+			}
+			else
 			{
-				// No rows at all for this user, default to ''
-				$rowset[$user_id] = array('');
+				foreach ($default_methods as $default_method)
+				{
+					if (!array_key_exists($default_method, $rowset[$user_id]))
+					{
+						// No user preference for this type recorded, but it should be enabled by default.
+						$output[$user_id][] = $default_method;
+					}
+				}
 			}
 		}
 
-		return $rowset;
+		return $output;
 	}
 
 	/**
@@ -516,22 +523,23 @@ abstract class base implements \phpbb\notification\type\type_interface
 	{
 		$this->notification_read = (bool) !$unread;
 
-		$where = array(
-			'notification_type_id = ' . (int) $this->notification_type_id,
-			'item_id = ' . (int) $this->item_id,
-			'user_id = ' . (int) $this->user_id,
-		);
-		$where = implode(' AND ', $where);
-
 		if ($return)
 		{
+			$where = array(
+				'notification_type_id = ' . (int) $this->notification_type_id,
+				'item_id = ' . (int) $this->item_id,
+				'user_id = ' . (int) $this->user_id,
+			);
+
+			$where = implode(' AND ', $where);
 			return $where;
 		}
+		else
+		{
+			$this->notification_manager->mark_notifications($this->get_type(), (int) $this->item_id, (int) $this->user_id, false, $this->notification_read);
+		}
 
-		$sql = 'UPDATE ' . $this->notifications_table . '
-			SET notification_read = ' . (int) $this->notification_read . '
-			WHERE ' . $where;
-		$this->db->sql_query($sql);
+		return null;
 	}
 
 	/**
diff --git a/phpBB/phpbb/notification/type/bookmark.php b/phpBB/phpbb/notification/type/bookmark.php
index 1626add22c..ebbb961c57 100644
--- a/phpBB/phpbb/notification/type/bookmark.php
+++ b/phpBB/phpbb/notification/type/bookmark.php
@@ -43,7 +43,7 @@ class bookmark extends \phpbb\notification\type\post
 	* @var bool|array False if the service should use it's default data
 	* 					Array of data (including keys 'id', 'lang', and 'group')
 	*/
-	public static $notification_option = array(
+	static public $notification_option = array(
 		'lang'	=> 'NOTIFICATION_TYPE_BOOKMARK',
 		'group'	=> 'NOTIFICATION_GROUP_POSTING',
 	);
@@ -91,31 +91,27 @@ class bookmark extends \phpbb\notification\type\post
 		}
 
 		// Try to find the users who already have been notified about replies and have not read the topic since and just update their notifications
-		$update_notifications = array();
-		$sql = 'SELECT n.*
-			FROM ' . $this->notifications_table . ' n, ' . $this->notification_types_table . ' nt
-			WHERE n.notification_type_id = ' . (int) $this->notification_type_id . '
-				AND n.item_parent_id = ' . (int) static::get_item_parent_id($post) . '
-				AND n.notification_read = 0
-				AND nt.notification_type_id = n.notification_type_id
-				AND nt.notification_type_enabled = 1';
-		$result = $this->db->sql_query($sql);
-		while ($row = $this->db->sql_fetchrow($result))
+		$notified_users = $this->notification_manager->get_notified_users($this->get_type(), array(
+			'item_parent_id'	=> static::get_item_parent_id($post),
+			'read'				=> 0,
+		));
+
+		foreach ($notified_users as $user => $notification_data)
 		{
-			// Do not create a new notification
-			unset($notify_users[$row['user_id']]);
+			unset($notify_users[$user]);
 
-			$notification = $this->notification_manager->get_item_type_class($this->get_type(), $row);
+			/** @var bookmark $notification */
+			$notification = $this->notification_manager->get_item_type_class($this->get_type(), $notification_data);
 			$update_responders = $notification->add_responders($post);
 			if (!empty($update_responders))
 			{
-				$sql = 'UPDATE ' . $this->notifications_table . '
-					SET ' . $this->db->sql_build_array('UPDATE', $update_responders) . '
-					WHERE notification_id = ' . $row['notification_id'];
-				$this->db->sql_query($sql);
+				$this->notification_manager->update_notification($notification, $update_responders, array(
+					'item_parent_id'	=> self::get_item_parent_id($post),
+					'read'				=> 0,
+					'user_id'			=> $user,
+				));
 			}
 		}
-		$this->db->sql_freeresult($result);
 
 		return $notify_users;
 	}
diff --git a/phpBB/phpbb/notification/type/disapprove_post.php b/phpBB/phpbb/notification/type/disapprove_post.php
index 6c7bcbcaee..2d908eb254 100644
--- a/phpBB/phpbb/notification/type/disapprove_post.php
+++ b/phpBB/phpbb/notification/type/disapprove_post.php
@@ -60,7 +60,7 @@ class disapprove_post extends \phpbb\notification\type\approve_post
 	* @var bool|array False if the service should use it's default data
 	* 					Array of data (including keys 'id', 'lang', and 'group')
 	*/
-	public static $notification_option = array(
+	static public $notification_option = array(
 		'id'	=> 'moderation_queue',
 		'lang'	=> 'NOTIFICATION_TYPE_MODERATION_QUEUE',
 		'group'	=> 'NOTIFICATION_GROUP_POSTING',
@@ -73,7 +73,7 @@ class disapprove_post extends \phpbb\notification\type\approve_post
 	*/
 	public function get_title()
 	{
-		return $this->user->lang($this->language_key);
+		return $this->language->lang($this->language_key);
 	}
 
 	/**
@@ -83,7 +83,7 @@ class disapprove_post extends \phpbb\notification\type\approve_post
 	*/
 	public function get_reference()
 	{
-		return $this->user->lang(
+		return $this->language->lang(
 			'NOTIFICATION_REFERENCE',
 			censor_text($this->get_data('topic_title'))
 		);
@@ -96,7 +96,7 @@ class disapprove_post extends \phpbb\notification\type\approve_post
 	*/
 	public function get_reason()
 	{
-		return $this->user->lang(
+		return $this->language->lang(
 			'NOTIFICATION_REASON',
 			$this->get_data('disapprove_reason')
 		);
@@ -125,21 +125,24 @@ class disapprove_post extends \phpbb\notification\type\approve_post
 	}
 
 	/**
-	* Function for preparing the data for insertion in an SQL query
-	* (The service handles insertion)
-	*
-	* @param array $post Data from submit_post
-	* @param array $pre_create_data Data from pre_create_insert_array()
-	*
-	* @return array Array of data ready to be inserted into the database
+	* {@inheritdoc}
 	*/
 	public function create_insert_array($post, $pre_create_data = array())
 	{
 		$this->set_data('disapprove_reason', $post['disapprove_reason']);
 
-		$data = parent::create_insert_array($post);
+		parent::create_insert_array($post, $pre_create_data);
+
+		$this->notification_time = time();
+	}
 
-		$this->notification_time = $data['notification_time'] = time();
+	/**
+	* {@inheritdoc}
+	*/
+	public function get_insert_array()
+	{
+		$data = parent::get_insert_array();
+		$data['notification_time'] = $this->notification_time;
 
 		return $data;
 	}
diff --git a/phpBB/phpbb/notification/type/disapprove_topic.php b/phpBB/phpbb/notification/type/disapprove_topic.php
index efa5eb7ecd..c2522fb562 100644
--- a/phpBB/phpbb/notification/type/disapprove_topic.php
+++ b/phpBB/phpbb/notification/type/disapprove_topic.php
@@ -60,7 +60,7 @@ class disapprove_topic extends \phpbb\notification\type\approve_topic
 	* @var bool|array False if the service should use it's default data
 	* 					Array of data (including keys 'id', 'lang', and 'group')
 	*/
-	public static $notification_option = array(
+	static public $notification_option = array(
 		'id'	=> 'moderation_queue',
 		'lang'	=> 'NOTIFICATION_TYPE_MODERATION_QUEUE',
 		'group'	=> 'NOTIFICATION_GROUP_POSTING',
@@ -73,7 +73,7 @@ class disapprove_topic extends \phpbb\notification\type\approve_topic
 	*/
 	public function get_title()
 	{
-		return $this->user->lang($this->language_key);
+		return $this->language->lang($this->language_key);
 	}
 
 	/**
@@ -83,7 +83,7 @@ class disapprove_topic extends \phpbb\notification\type\approve_topic
 	*/
 	public function get_reference()
 	{
-		return $this->user->lang(
+		return $this->language->lang(
 			'NOTIFICATION_REFERENCE',
 			censor_text($this->get_data('topic_title'))
 		);
@@ -96,7 +96,7 @@ class disapprove_topic extends \phpbb\notification\type\approve_topic
 	*/
 	public function get_reason()
 	{
-		return $this->user->lang(
+		return $this->language->lang(
 			'NOTIFICATION_REASON',
 			$this->get_data('disapprove_reason')
 		);
@@ -125,21 +125,24 @@ class disapprove_topic extends \phpbb\notification\type\approve_topic
 	}
 
 	/**
-	* Function for preparing the data for insertion in an SQL query
-	* (The service handles insertion)
-	*
-	* @param array $post Data from submit_post
-	* @param array $pre_create_data Data from pre_create_insert_array()
-	*
-	* @return array Array of data ready to be inserted into the database
+	* {@inheritdoc}
 	*/
 	public function create_insert_array($post, $pre_create_data = array())
 	{
 		$this->set_data('disapprove_reason', $post['disapprove_reason']);
 
-		$data = parent::create_insert_array($post, $pre_create_data);
+		parent::create_insert_array($post, $pre_create_data);
+
+		$this->notification_time = time();
+	}
 
-		$this->notification_time = $data['notification_time'] = time();
+	/**
+	* {@inheritdoc}
+	*/
+	public function get_insert_array()
+	{
+		$data = parent::get_insert_array();
+		$data['notification_time'] = $this->notification_time;
 
 		return $data;
 	}
diff --git a/phpBB/phpbb/notification/type/group_request.php b/phpBB/phpbb/notification/type/group_request.php
index 96bfc86322..28a9e73bf9 100644
--- a/phpBB/phpbb/notification/type/group_request.php
+++ b/phpBB/phpbb/notification/type/group_request.php
@@ -26,10 +26,18 @@ class group_request extends \phpbb\notification\type\base
 	/**
 	* {@inheritdoc}
 	*/
-	public static $notification_option = array(
+	static public $notification_option = array(
 		'lang'	=> 'NOTIFICATION_TYPE_GROUP_REQUEST',
 	);
 
+	/** @var \phpbb\user_loader */
+	protected $user_loader;
+
+	public function set_user_loader(\phpbb\user_loader $user_loader)
+	{
+		$this->user_loader = $user_loader;
+	}
+
 	/**
 	* {@inheritdoc}
 	*/
@@ -50,7 +58,7 @@ class group_request extends \phpbb\notification\type\base
 	/**
 	* {@inheritdoc}
 	*/
-	public static function get_item_id($group)
+	static public function get_item_id($group)
 	{
 		return (int) $group['user_id'];
 	}
@@ -58,7 +66,7 @@ class group_request extends \phpbb\notification\type\base
 	/**
 	* {@inheritdoc}
 	*/
-	public static function get_item_parent_id($group)
+	static public function get_item_parent_id($group)
 	{
 		// Group id is the parent
 		return (int) $group['group_id'];
@@ -106,7 +114,7 @@ class group_request extends \phpbb\notification\type\base
 	{
 		$username = $this->user_loader->get_username($this->item_id, 'no_profile');
 
-		return $this->user->lang('NOTIFICATION_GROUP_REQUEST', $username, $this->get_data('group_name'));
+		return $this->language->lang('NOTIFICATION_GROUP_REQUEST', $username, $this->get_data('group_name'));
 	}
 
 	/**
@@ -156,6 +164,6 @@ class group_request extends \phpbb\notification\type\base
 	{
 		$this->set_data('group_name', $group['group_name']);
 
-		return parent::create_insert_array($group, $pre_create_data);
+		parent::create_insert_array($group, $pre_create_data);
 	}
 }
diff --git a/phpBB/phpbb/notification/type/group_request_approved.php b/phpBB/phpbb/notification/type/group_request_approved.php
index d284046ffa..f55d28bafd 100644
--- a/phpBB/phpbb/notification/type/group_request_approved.php
+++ b/phpBB/phpbb/notification/type/group_request_approved.php
@@ -34,7 +34,7 @@ class group_request_approved extends \phpbb\notification\type\base
 	/**
 	* {@inheritdoc}
 	*/
-	public static function get_item_id($group)
+	static public function get_item_id($group)
 	{
 		return (int) $group['group_id'];
 	}
@@ -42,7 +42,7 @@ class group_request_approved extends \phpbb\notification\type\base
 	/**
 	* {@inheritdoc}
 	*/
-	public static function get_item_parent_id($group)
+	static public function get_item_parent_id($group)
 	{
 		return 0;
 	}
@@ -58,7 +58,7 @@ class group_request_approved extends \phpbb\notification\type\base
 
 		foreach ($group['user_ids'] as $user_id)
 		{
-			$users[$user_id] = array('');
+			$users[$user_id] = $this->notification_manager->get_default_methods();
 		}
 
 		return $users;
@@ -69,7 +69,7 @@ class group_request_approved extends \phpbb\notification\type\base
 	*/
 	public function get_title()
 	{
-		return $this->user->lang('NOTIFICATION_GROUP_REQUEST_APPROVED', $this->get_data('group_name'));
+		return $this->language->lang('NOTIFICATION_GROUP_REQUEST_APPROVED', $this->get_data('group_name'));
 	}
 
 	/**
@@ -87,7 +87,7 @@ class group_request_approved extends \phpbb\notification\type\base
 	{
 		$this->set_data('group_name', $group['group_name']);
 
-		return parent::create_insert_array($group, $pre_create_data);
+		parent::create_insert_array($group, $pre_create_data);
 	}
 
 	/**
diff --git a/phpBB/phpbb/notification/type/pm.php b/phpBB/phpbb/notification/type/pm.php
index d2f34f95d0..c51586afb9 100644
--- a/phpBB/phpbb/notification/type/pm.php
+++ b/phpBB/phpbb/notification/type/pm.php
@@ -36,10 +36,26 @@ class pm extends \phpbb\notification\type\base
 	* @var bool|array False if the service should use it's default data
 	* 					Array of data (including keys 'id', 'lang', and 'group')
 	*/
-	public static $notification_option = array(
+	static public $notification_option = array(
 		'lang'	=> 'NOTIFICATION_TYPE_PM',
 	);
 
+	/** @var \phpbb\user_loader */
+	protected $user_loader;
+
+	/** @var \phpbb\config\config */
+	protected $config;
+
+	public function set_config(\phpbb\config\config $config)
+	{
+		$this->config = $config;
+	}
+
+	public function set_user_loader(\phpbb\user_loader $user_loader)
+	{
+		$this->user_loader = $user_loader;
+	}
+
 	/**
 	* Is available
 	*/
@@ -53,7 +69,7 @@ class pm extends \phpbb\notification\type\base
 	*
 	* @param array $pm The data from the private message
 	*/
-	public static function get_item_id($pm)
+	static public function get_item_id($pm)
 	{
 		return (int) $pm['msg_id'];
 	}
@@ -63,7 +79,7 @@ class pm extends \phpbb\notification\type\base
 	*
 	* @param array $pm The data from the pm
 	*/
-	public static function get_item_parent_id($pm)
+	static public function get_item_parent_id($pm)
 	{
 		// No parent
 		return 0;
@@ -83,7 +99,7 @@ class pm extends \phpbb\notification\type\base
 			'ignore_users'		=> array(),
 		), $options);
 
-		if (!sizeof($pm['recipients']))
+		if (!count($pm['recipients']))
 		{
 			return array();
 		}
@@ -112,7 +128,7 @@ class pm extends \phpbb\notification\type\base
 	{
 		$username = $this->user_loader->get_username($this->get_data('from_user_id'), 'no_profile');
 
-		return $this->user->lang('NOTIFICATION_PM', $username);
+		return $this->language->lang('NOTIFICATION_PM', $username);
 	}
 
 	/**
@@ -122,7 +138,7 @@ class pm extends \phpbb\notification\type\base
 	*/
 	public function get_reference()
 	{
-		return $this->user->lang(
+		return $this->language->lang(
 			'NOTIFICATION_REFERENCE',
 			$this->get_data('message_subject')
 		);
@@ -176,13 +192,7 @@ class pm extends \phpbb\notification\type\base
 	}
 
 	/**
-	* Function for preparing the data for insertion in an SQL query
-	* (The service handles insertion)
-	*
-	* @param array $pm Data from submit_post
-	* @param array $pre_create_data Data from pre_create_insert_array()
-	*
-	* @return array Array of data ready to be inserted into the database
+	* {@inheritdoc}
 	*/
 	public function create_insert_array($pm, $pre_create_data = array())
 	{
@@ -190,6 +200,6 @@ class pm extends \phpbb\notification\type\base
 
 		$this->set_data('message_subject', $pm['message_subject']);
 
-		return parent::create_insert_array($pm, $pre_create_data);
+		parent::create_insert_array($pm, $pre_create_data);
 	}
 }
diff --git a/phpBB/phpbb/notification/type/post.php b/phpBB/phpbb/notification/type/post.php
index 2969da550d..254f4c07b3 100644
--- a/phpBB/phpbb/notification/type/post.php
+++ b/phpBB/phpbb/notification/type/post.php
@@ -50,11 +50,27 @@ class post extends \phpbb\notification\type\base
 	* @var bool|array False if the service should use it's default data
 	* 					Array of data (including keys 'id', 'lang', and 'group')
 	*/
-	public static $notification_option = array(
+	static public $notification_option = array(
 		'lang'	=> 'NOTIFICATION_TYPE_POST',
 		'group'	=> 'NOTIFICATION_GROUP_POSTING',
 	);
 
+	/** @var \phpbb\user_loader */
+	protected $user_loader;
+
+	/** @var \phpbb\config\config */
+	protected $config;
+
+	public function set_config(\phpbb\config\config $config)
+	{
+		$this->config = $config;
+	}
+
+	public function set_user_loader(\phpbb\user_loader $user_loader)
+	{
+		$this->user_loader = $user_loader;
+	}
+
 	/**
 	* Is available
 	*/
@@ -67,8 +83,9 @@ class post extends \phpbb\notification\type\base
 	* Get the id of the item
 	*
 	* @param array $post The data from the post
+	* @return int The post id
 	*/
-	public static function get_item_id($post)
+	static public function get_item_id($post)
 	{
 		return (int) $post['post_id'];
 	}
@@ -77,8 +94,9 @@ class post extends \phpbb\notification\type\base
 	* Get the id of the parent
 	*
 	* @param array $post The data from the post
+	* @return int The topic id
 	*/
-	public static function get_item_parent_id($post)
+	static public function get_item_parent_id($post)
 	{
 		return (int) $post['topic_id'];
 	}
@@ -131,31 +149,27 @@ class post extends \phpbb\notification\type\base
 		}
 
 		// Try to find the users who already have been notified about replies and have not read the topic since and just update their notifications
-		$update_notifications = array();
-		$sql = 'SELECT n.*
-			FROM ' . $this->notifications_table . ' n, ' . $this->notification_types_table . ' nt
-			WHERE n.notification_type_id = ' . (int) $this->notification_type_id . '
-				AND n.item_parent_id = ' . (int) static::get_item_parent_id($post) . '
-				AND n.notification_read = 0
-				AND nt.notification_type_id = n.notification_type_id
-				AND nt.notification_type_enabled = 1';
-		$result = $this->db->sql_query($sql);
-		while ($row = $this->db->sql_fetchrow($result))
+		$notified_users = $this->notification_manager->get_notified_users($this->get_type(), array(
+			'item_parent_id'	=> static::get_item_parent_id($post),
+			'read'				=> 0,
+		));
+
+		foreach ($notified_users as $user => $notification_data)
 		{
-			// Do not create a new notification
-			unset($notify_users[$row['user_id']]);
+			unset($notify_users[$user]);
 
-			$notification = $this->notification_manager->get_item_type_class($this->get_type(), $row);
+			/** @var post $notification */
+			$notification = $this->notification_manager->get_item_type_class($this->get_type(), $notification_data);
 			$update_responders = $notification->add_responders($post);
 			if (!empty($update_responders))
 			{
-				$sql = 'UPDATE ' . $this->notifications_table . '
-					SET ' . $this->db->sql_build_array('UPDATE', $update_responders) . '
-					WHERE notification_id = ' . $row['notification_id'];
-				$this->db->sql_query($sql);
+				$this->notification_manager->update_notification($notification, $update_responders, array(
+					'item_parent_id'	=> self::get_item_parent_id($post),
+					'read'				=> 0,
+					'user_id'			=> $user,
+				));
 			}
 		}
-		$this->db->sql_freeresult($result);
 
 		return $notify_users;
 	}
@@ -188,9 +202,9 @@ class post extends \phpbb\notification\type\base
 			'username'		=> $this->get_data('post_username'),
 		)), $responders);
 
-		$responders_cnt = sizeof($responders);
+		$responders_cnt = count($responders);
 		$responders = $this->trim_user_ary($responders);
-		$trimmed_responders_cnt = $responders_cnt - sizeof($responders);
+		$trimmed_responders_cnt = $responders_cnt - count($responders);
 
 		foreach ($responders as $responder)
 		{
@@ -206,14 +220,14 @@ class post extends \phpbb\notification\type\base
 
 		if ($trimmed_responders_cnt > 20)
 		{
-			$usernames[] = $this->user->lang('NOTIFICATION_MANY_OTHERS');
+			$usernames[] = $this->language->lang('NOTIFICATION_MANY_OTHERS');
 		}
 		else if ($trimmed_responders_cnt)
 		{
-			$usernames[] = $this->user->lang('NOTIFICATION_X_OTHERS', $trimmed_responders_cnt);
+			$usernames[] = $this->language->lang('NOTIFICATION_X_OTHERS', $trimmed_responders_cnt);
 		}
 
-		return $this->user->lang(
+		return $this->language->lang(
 			$this->language_key,
 			phpbb_generate_string_list($usernames, $this->user),
 			$responders_cnt
@@ -227,7 +241,7 @@ class post extends \phpbb\notification\type\base
 	*/
 	public function get_reference()
 	{
-		return $this->user->lang(
+		return $this->language->lang(
 			'NOTIFICATION_REFERENCE',
 			censor_text($this->get_data('topic_title'))
 		);
@@ -323,7 +337,7 @@ class post extends \phpbb\notification\type\base
 	*/
 	public function trim_user_ary($users)
 	{
-		if (sizeof($users) > 4)
+		if (count($users) > 4)
 		{
 			array_splice($users, 3);
 		}
@@ -343,7 +357,7 @@ class post extends \phpbb\notification\type\base
 	*/
 	public function pre_create_insert_array($post, $notify_users)
 	{
-		if (!sizeof($notify_users) || !$this->inherit_read_status)
+		if (!count($notify_users) || !$this->inherit_read_status)
 		{
 			return array();
 		}
@@ -363,13 +377,7 @@ class post extends \phpbb\notification\type\base
 	}
 
 	/**
-	* Function for preparing the data for insertion in an SQL query
-	* (The service handles insertion)
-	*
-	* @param array $post Data from submit_post
-	* @param array $pre_create_data Data from pre_create_insert_array()
-	*
-	* @return array Array of data ready to be inserted into the database
+	* {@inheritdoc}
 	*/
 	public function create_insert_array($post, $pre_create_data = array())
 	{
@@ -394,13 +402,14 @@ class post extends \phpbb\notification\type\base
 			$this->notification_read = true;
 		}
 
-		return parent::create_insert_array($post, $pre_create_data);
+		parent::create_insert_array($post, $pre_create_data);
 	}
 
 	/**
 	* Add responders to the notification
 	*
 	* @param mixed $post
+	* @return array Array of responder data
 	*/
 	public function add_responders($post)
 	{
@@ -417,7 +426,7 @@ class post extends \phpbb\notification\type\base
 		// Do not add more than 25 responders,
 		// we trim the username list to "a, b, c and x others" anyway
 		// so there is no use to add all of them anyway.
-		if (sizeof($responders) > 25)
+		if (count($responders) > 25)
 		{
 			return array();
 		}
@@ -447,6 +456,12 @@ class post extends \phpbb\notification\type\base
 			return array();
 		}
 
-		return array('notification_data' => $serialized_data);
+		$data_array = array_merge(array(
+			'post_time'		=> $post['post_time'],
+			'post_id'		=> $post['post_id'],
+			'topic_id'		=> $post['topic_id']
+		), $this->get_data(false));
+
+		return $data_array;
 	}
 }
diff --git a/phpBB/phpbb/notification/type/post_in_queue.php b/phpBB/phpbb/notification/type/post_in_queue.php
index 5832c99cd2..2d556fc9c8 100644
--- a/phpBB/phpbb/notification/type/post_in_queue.php
+++ b/phpBB/phpbb/notification/type/post_in_queue.php
@@ -43,7 +43,7 @@ class post_in_queue extends \phpbb\notification\type\post
 	* @var bool|array False if the service should use it's default data
 	* 					Array of data (including keys 'id', 'lang', and 'group')
 	*/
-	public static $notification_option = array(
+	static public $notification_option = array(
 		'id'	=> 'notification.type.needs_approval',
 		'lang'	=> 'NOTIFICATION_TYPE_IN_MODERATION_QUEUE',
 		'group'	=> 'NOTIFICATION_GROUP_MODERATION',
@@ -131,19 +131,22 @@ class post_in_queue extends \phpbb\notification\type\post
 	}
 
 	/**
-	* Function for preparing the data for insertion in an SQL query
-	* (The service handles insertion)
-	*
-	* @param array $post Data from submit_post
-	* @param array $pre_create_data Data from pre_create_insert_array()
-	*
-	* @return array Array of data ready to be inserted into the database
+	* {@inheritdoc}
 	*/
 	public function create_insert_array($post, $pre_create_data = array())
 	{
-		$data = parent::create_insert_array($post, $pre_create_data);
+		parent::create_insert_array($post, $pre_create_data);
+
+		$this->notification_time = time();
+	}
 
-		$this->notification_time = $data['notification_time'] = time();
+	/**
+	* {@inheritdoc}
+	*/
+	public function get_insert_array()
+	{
+		$data = parent::get_insert_array();
+		$data['notification_time'] = $this->notification_time;
 
 		return $data;
 	}
diff --git a/phpBB/phpbb/notification/type/quote.php b/phpBB/phpbb/notification/type/quote.php
index 2732cb84e4..323c18b204 100644
--- a/phpBB/phpbb/notification/type/quote.php
+++ b/phpBB/phpbb/notification/type/quote.php
@@ -21,6 +21,11 @@ namespace phpbb\notification\type;
 class quote extends \phpbb\notification\type\post
 {
 	/**
+	* @var \phpbb\textformatter\utils_interface
+	*/
+	protected $utils;
+
+	/**
 	* Get notification type name
 	*
 	* @return string
@@ -31,13 +36,6 @@ class quote extends \phpbb\notification\type\post
 	}
 
 	/**
-	* regular expression to match to find usernames
-	*
-	* @var string
-	*/
-	protected static $regular_expression_match = '#\[quote=&quot;(.+?)&quot;#';
-
-	/**
 	* Language key used to output the text
 	*
 	* @var string
@@ -50,7 +48,7 @@ class quote extends \phpbb\notification\type\post
 	* @var bool|array False if the service should use it's default data
 	* 					Array of data (including keys 'id', 'lang', and 'group')
 	*/
-	public static $notification_option = array(
+	static public $notification_option = array(
 		'lang'	=> 'NOTIFICATION_TYPE_QUOTE',
 		'group'	=> 'NOTIFICATION_GROUP_POSTING',
 	);
@@ -77,17 +75,16 @@ class quote extends \phpbb\notification\type\post
 			'ignore_users'		=> array(),
 		), $options);
 
-		$usernames = false;
-		preg_match_all(static::$regular_expression_match, $post['post_text'], $usernames);
+		$usernames = $this->utils->get_outermost_quote_authors($post['post_text']);
 
-		if (empty($usernames[1]))
+		if (empty($usernames))
 		{
 			return array();
 		}
 
-		$usernames[1] = array_unique($usernames[1]);
+		$usernames = array_unique($usernames);
 
-		$usernames = array_map('utf8_clean_string', $usernames[1]);
+		$usernames = array_map('utf8_clean_string', $usernames);
 
 		$users = array();
 
@@ -109,32 +106,23 @@ class quote extends \phpbb\notification\type\post
 	* Update a notification
 	*
 	* @param array $post Data specific for this type that will be updated
+	* @return true
 	*/
 	public function update_notifications($post)
 	{
-		$old_notifications = array();
-		$sql = 'SELECT n.user_id
-			FROM ' . $this->notifications_table . ' n, ' . $this->notification_types_table . ' nt
-			WHERE n.notification_type_id = ' . (int) $this->notification_type_id . '
-				AND n.item_id = ' . static::get_item_id($post) . '
-				AND nt.notification_type_id = n.notification_type_id
-				AND nt.notification_type_enabled = 1';
-		$result = $this->db->sql_query($sql);
-		while ($row = $this->db->sql_fetchrow($result))
-		{
-			$old_notifications[] = $row['user_id'];
-		}
-		$this->db->sql_freeresult($result);
+		$old_notifications = $this->notification_manager->get_notified_users($this->get_type(), array(
+			'item_id'	=> static::get_item_id($post),
+		));
 
 		// Find the new users to notify
 		$notifications = $this->find_users_for_notification($post);
 
 		// Find the notifications we must delete
-		$remove_notifications = array_diff($old_notifications, array_keys($notifications));
+		$remove_notifications = array_diff(array_keys($old_notifications), array_keys($notifications));
 
 		// Find the notifications we must add
 		$add_notifications = array();
-		foreach (array_diff(array_keys($notifications), $old_notifications) as $user_id)
+		foreach (array_diff(array_keys($notifications), array_keys($old_notifications)) as $user_id)
 		{
 			$add_notifications[$user_id] = $notifications[$user_id];
 		}
@@ -145,11 +133,7 @@ class quote extends \phpbb\notification\type\post
 		// Remove the necessary notifications
 		if (!empty($remove_notifications))
 		{
-			$sql = 'DELETE FROM ' . $this->notifications_table . '
-				WHERE notification_type_id = ' . (int) $this->notification_type_id . '
-					AND item_id = ' . static::get_item_id($post) . '
-					AND ' . $this->db->sql_in_set('user_id', $remove_notifications);
-			$this->db->sql_query($sql);
+			$this->notification_manager->delete_notifications($this->get_type(), static::get_item_id($post), false, $remove_notifications);
 		}
 
 		// return true to continue with the update code in the notifications service (this will update the rest of the notifications)
@@ -187,4 +171,14 @@ class quote extends \phpbb\notification\type\post
 			'AUTHOR_NAME'		=> htmlspecialchars_decode($user_data['username']),
 		));
 	}
+
+	/**
+	* Set the utils service used to retrieve quote authors
+	*
+	* @param \phpbb\textformatter\utils_interface $utils
+	*/
+	public function set_utils(\phpbb\textformatter\utils_interface $utils)
+	{
+		$this->utils = $utils;
+	}
 }
diff --git a/phpBB/phpbb/notification/type/report_pm.php b/phpBB/phpbb/notification/type/report_pm.php
index fc39623c5c..444f98270d 100644
--- a/phpBB/phpbb/notification/type/report_pm.php
+++ b/phpBB/phpbb/notification/type/report_pm.php
@@ -60,7 +60,7 @@ class report_pm extends \phpbb\notification\type\pm
 	* @var bool|array False if the service should use it's default data
 	* 					Array of data (including keys 'id', 'lang', and 'group')
 	*/
-	public static $notification_option = array(
+	static public $notification_option = array(
 		'id'	=> 'notification.type.report',
 		'lang'	=> 'NOTIFICATION_TYPE_REPORT',
 		'group'	=> 'NOTIFICATION_GROUP_MODERATION',
@@ -70,8 +70,9 @@ class report_pm extends \phpbb\notification\type\pm
 	* Get the id of the parent
 	*
 	* @param array $pm The data from the pm
+	* @return int The report id
 	*/
-	public static function get_item_parent_id($pm)
+	static public function get_item_parent_id($pm)
 	{
 		return (int) $pm['report_id'];
 	}
@@ -141,13 +142,16 @@ class report_pm extends \phpbb\notification\type\pm
 	*/
 	public function get_email_template_variables()
 	{
-		$user_data = $this->user_loader->get_user($this->get_data('reporter_id'));
+		$user_data = $this->user_loader->get_user($this->get_data('from_user_id'));
 
 		return array(
-			'AUTHOR_NAME'				=> htmlspecialchars_decode($user_data['username']),
-			'SUBJECT'					=> htmlspecialchars_decode(censor_text($this->get_data('message_subject'))),
+			'AUTHOR_NAME'	=> htmlspecialchars_decode($user_data['username']),
+			'SUBJECT'		=> htmlspecialchars_decode(censor_text($this->get_data('message_subject'))),
 
-			'U_VIEW_REPORT'				=> generate_board_url() . "mcp.{$this->php_ext}?r={$this->item_parent_id}&amp;i=pm_reports&amp;mode=pm_report_details",
+			/** @deprecated	3.2.6-RC1	(to be removed in 4.0.0) use {SUBJECT} instead in report_pm.txt */
+			'TOPIC_TITLE'	=> htmlspecialchars_decode(censor_text($this->get_data('message_subject'))),
+
+			'U_VIEW_REPORT'	=> generate_board_url() . "/mcp.{$this->php_ext}?r={$this->item_parent_id}&amp;i=pm_reports&amp;mode=pm_report_details",
 		);
 	}
 
@@ -168,11 +172,11 @@ class report_pm extends \phpbb\notification\type\pm
 	*/
 	public function get_title()
 	{
-		$this->user->add_lang('mcp');
+		$this->language->add_lang('mcp');
 
 		$username = $this->user_loader->get_username($this->get_data('reporter_id'), 'no_profile');
 
-		return $this->user->lang(
+		return $this->language->lang(
 			$this->language_key,
 			$username
 		);
@@ -185,7 +189,7 @@ class report_pm extends \phpbb\notification\type\pm
 	*/
 	public function get_reference()
 	{
-		return $this->user->lang(
+		return $this->language->lang(
 			'NOTIFICATION_REFERENCE',
 			censor_text($this->get_data('message_subject'))
 		);
@@ -200,21 +204,21 @@ class report_pm extends \phpbb\notification\type\pm
 	{
 		if ($this->get_data('report_text'))
 		{
-			return $this->user->lang(
+			return $this->language->lang(
 				'NOTIFICATION_REASON',
 				$this->get_data('report_text')
 			);
 		}
 
-		if (isset($this->user->lang[$this->get_data('reason_title')]))
+		if ($this->language->is_set($this->get_data('reason_title')))
 		{
-			return $this->user->lang(
+			return $this->language->lang(
 				'NOTIFICATION_REASON',
-				$this->user->lang[$this->get_data('reason_title')]
+				$this->language->lang($this->get_data('reason_title'))
 			);
 		}
 
-		return $this->user->lang(
+		return $this->language->lang(
 			'NOTIFICATION_REASON',
 			$this->get_data('reason_description')
 		);
@@ -235,17 +239,13 @@ class report_pm extends \phpbb\notification\type\pm
 	*/
 	public function users_to_query()
 	{
-		return array($this->get_data('reporter_id'));
-	}
+		return array(
+			$this->get_data('from_user_id'),
+			$this->get_data('reporter_id'),
+		);	}
 
 	/**
-	* Function for preparing the data for insertion in an SQL query
-	* (The service handles insertion)
-	*
-	* @param array $post Data from submit_post
-	* @param array $pre_create_data Data from pre_create_insert_array()
-	*
-	* @return array Array of data ready to be inserted into the database
+	* {@inheritdoc}
 	*/
 	public function create_insert_array($post, $pre_create_data = array())
 	{
@@ -254,6 +254,6 @@ class report_pm extends \phpbb\notification\type\pm
 		$this->set_data('reason_description', $post['reason_description']);
 		$this->set_data('report_text', $post['report_text']);
 
-		return parent::create_insert_array($post, $pre_create_data);
+		parent::create_insert_array($post, $pre_create_data);
 	}
 }
diff --git a/phpBB/phpbb/notification/type/report_pm_closed.php b/phpBB/phpbb/notification/type/report_pm_closed.php
index 1c99db60c3..5e98eb5feb 100644
--- a/phpBB/phpbb/notification/type/report_pm_closed.php
+++ b/phpBB/phpbb/notification/type/report_pm_closed.php
@@ -64,7 +64,7 @@ class report_pm_closed extends \phpbb\notification\type\pm
 			return array();
 		}
 
-		return array($pm['reporter'] => array(''));
+		return array($pm['reporter'] => $this->notification_manager->get_default_methods());
 	}
 
 	/**
@@ -106,7 +106,7 @@ class report_pm_closed extends \phpbb\notification\type\pm
 	{
 		$username = $this->user_loader->get_username($this->get_data('closer_id'), 'no_profile');
 
-		return $this->user->lang(
+		return $this->language->lang(
 			$this->language_key,
 			$username
 		);
@@ -119,7 +119,7 @@ class report_pm_closed extends \phpbb\notification\type\pm
 	*/
 	public function get_reference()
 	{
-		return $this->user->lang(
+		return $this->language->lang(
 			'NOTIFICATION_REFERENCE',
 			censor_text($this->get_data('message_subject'))
 		);
@@ -144,21 +144,24 @@ class report_pm_closed extends \phpbb\notification\type\pm
 	}
 
 	/**
-	* Function for preparing the data for insertion in an SQL query
-	* (The service handles insertion)
-	*
-	* @param array $pm PM Data
-	* @param array $pre_create_data Data from pre_create_insert_array()
-	*
-	* @return array Array of data ready to be inserted into the database
+	* {@inheritdoc}
 	*/
 	public function create_insert_array($pm, $pre_create_data = array())
 	{
 		$this->set_data('closer_id', $pm['closer_id']);
 
-		$data = parent::create_insert_array($pm, $pre_create_data);
+		parent::create_insert_array($pm, $pre_create_data);
+
+		$this->notification_time = time();
+	}
 
-		$this->notification_time = $data['notification_time'] = time();
+	/**
+	* {@inheritdoc}
+	*/
+	public function get_insert_array()
+	{
+		$data = parent::get_insert_array();
+		$data['notification_time'] = $this->notification_time;
 
 		return $data;
 	}
diff --git a/phpBB/phpbb/notification/type/report_post.php b/phpBB/phpbb/notification/type/report_post.php
index aed31e8642..84a5241417 100644
--- a/phpBB/phpbb/notification/type/report_post.php
+++ b/phpBB/phpbb/notification/type/report_post.php
@@ -66,7 +66,7 @@ class report_post extends \phpbb\notification\type\post_in_queue
 	* @var bool|array False if the service should use it's default data
 	* 					Array of data (including keys 'id' and 'lang')
 	*/
-	public static $notification_option = array(
+	static public $notification_option = array(
 		'id'	=> 'notification.type.report',
 		'lang'	=> 'NOTIFICATION_TYPE_REPORT',
 		'group'	=> 'NOTIFICATION_GROUP_MODERATION',
@@ -139,11 +139,11 @@ class report_post extends \phpbb\notification\type\post_in_queue
 	*/
 	public function get_title()
 	{
-		$this->user->add_lang('mcp');
+		$this->language->add_lang('mcp');
 
 		$username = $this->user_loader->get_username($this->get_data('reporter_id'), 'no_profile');
 
-		return $this->user->lang(
+		return $this->language->lang(
 			$this->language_key,
 			$username
 		);
@@ -156,7 +156,7 @@ class report_post extends \phpbb\notification\type\post_in_queue
 	*/
 	public function get_reference()
 	{
-		return $this->user->lang(
+		return $this->language->lang(
 			'NOTIFICATION_REFERENCE',
 			censor_text($this->get_data('post_subject'))
 		);
@@ -171,21 +171,21 @@ class report_post extends \phpbb\notification\type\post_in_queue
 	{
 		if ($this->get_data('report_text'))
 		{
-			return $this->user->lang(
+			return $this->language->lang(
 				'NOTIFICATION_REASON',
 				$this->get_data('report_text')
 			);
 		}
 
-		if (isset($this->user->lang[$this->get_data('reason_title')]))
+		if ($this->language->is_set($this->get_data('reason_title')))
 		{
-			return $this->user->lang(
+			return $this->language->lang(
 				'NOTIFICATION_REASON',
-				$this->user->lang[$this->get_data('reason_title')]
+				$this->language->lang($this->get_data('reason_title'))
 			);
 		}
 
-		return $this->user->lang(
+		return $this->language->lang(
 			'NOTIFICATION_REASON',
 			$this->get_data('reason_description')
 		);
@@ -210,13 +210,7 @@ class report_post extends \phpbb\notification\type\post_in_queue
 	}
 
 	/**
-	* Function for preparing the data for insertion in an SQL query
-	* (The service handles insertion)
-	*
-	* @param array $post Data from submit_post
-	* @param array $pre_create_data Data from pre_create_insert_array()
-	*
-	* @return array Array of data ready to be inserted into the database
+	* {@inheritdoc}
 	*/
 	public function create_insert_array($post, $pre_create_data = array())
 	{
@@ -225,6 +219,6 @@ class report_post extends \phpbb\notification\type\post_in_queue
 		$this->set_data('reason_description', $post['reason_description']);
 		$this->set_data('report_text', $post['report_text']);
 
-		return parent::create_insert_array($post, $pre_create_data);
+		parent::create_insert_array($post, $pre_create_data);
 	}
 }
diff --git a/phpBB/phpbb/notification/type/report_post_closed.php b/phpBB/phpbb/notification/type/report_post_closed.php
index 3f4378628b..165034d57e 100644
--- a/phpBB/phpbb/notification/type/report_post_closed.php
+++ b/phpBB/phpbb/notification/type/report_post_closed.php
@@ -71,7 +71,7 @@ class report_post_closed extends \phpbb\notification\type\post
 			return array();
 		}
 
-		return array($post['reporter'] => array(''));
+		return array($post['reporter'] => $this->notification_manager->get_default_methods());
 	}
 
 	/**
@@ -113,7 +113,7 @@ class report_post_closed extends \phpbb\notification\type\post
 	{
 		$username = $this->user_loader->get_username($this->get_data('closer_id'), 'no_profile');
 
-		return $this->user->lang(
+		return $this->language->lang(
 			$this->language_key,
 			$username
 		);
@@ -126,7 +126,7 @@ class report_post_closed extends \phpbb\notification\type\post
 	*/
 	public function get_reference()
 	{
-		return $this->user->lang(
+		return $this->language->lang(
 			'NOTIFICATION_REFERENCE',
 			censor_text($this->get_data('post_subject'))
 		);
@@ -151,21 +151,24 @@ class report_post_closed extends \phpbb\notification\type\post
 	}
 
 	/**
-	* Function for preparing the data for insertion in an SQL query
-	* (The service handles insertion)
-	*
-	* @param array $post Data from submit_post
-	* @param array $pre_create_data Data from pre_create_insert_array()
-	*
-	* @return array Array of data ready to be inserted into the database
+	* {@inheritdoc}
 	*/
 	public function create_insert_array($post, $pre_create_data = array())
 	{
 		$this->set_data('closer_id', $post['closer_id']);
 
-		$data = parent::create_insert_array($post, $pre_create_data);
+		parent::create_insert_array($post, $pre_create_data);
+
+		$this->notification_time = time();
+	}
 
-		$this->notification_time = $data['notification_time'] = time();
+	/**
+	* {@inheritdoc}
+	*/
+	public function get_insert_array()
+	{
+		$data = parent::get_insert_array();
+		$data['notification_time'] = $this->notification_time;
 
 		return $data;
 	}
diff --git a/phpBB/phpbb/notification/type/topic.php b/phpBB/phpbb/notification/type/topic.php
index fb08a9eee1..5c42afa8c8 100644
--- a/phpBB/phpbb/notification/type/topic.php
+++ b/phpBB/phpbb/notification/type/topic.php
@@ -50,11 +50,27 @@ class topic extends \phpbb\notification\type\base
 	* @var bool|array False if the service should use it's default data
 	* 					Array of data (including keys 'id', 'lang', and 'group')
 	*/
-	public static $notification_option = array(
+	static public $notification_option = array(
 		'lang'	=> 'NOTIFICATION_TYPE_TOPIC',
 		'group'	=> 'NOTIFICATION_GROUP_POSTING',
 	);
 
+	/** @var \phpbb\user_loader */
+	protected $user_loader;
+
+	/** @var \phpbb\config\config */
+	protected $config;
+
+	public function set_config(\phpbb\config\config $config)
+	{
+		$this->config = $config;
+	}
+
+	public function set_user_loader(\phpbb\user_loader $user_loader)
+	{
+		$this->user_loader = $user_loader;
+	}
+
 	/**
 	* Is available
 	*/
@@ -67,8 +83,9 @@ class topic extends \phpbb\notification\type\base
 	* Get the id of the item
 	*
 	* @param array $post The data from the post
+	* @return int The topic id
 	*/
-	public static function get_item_id($post)
+	static public function get_item_id($post)
 	{
 		return (int) $post['topic_id'];
 	}
@@ -77,8 +94,9 @@ class topic extends \phpbb\notification\type\base
 	* Get the id of the parent
 	*
 	* @param array $post The data from the post
+	* @return int The forum id
 	*/
-	public static function get_item_parent_id($post)
+	static public function get_item_parent_id($post)
 	{
 		return (int) $post['forum_id'];
 	}
@@ -138,7 +156,7 @@ class topic extends \phpbb\notification\type\base
 			$username = $this->user_loader->get_username($this->get_data('poster_id'), 'no_profile');
 		}
 
-		return $this->user->lang(
+		return $this->language->lang(
 			$this->language_key,
 			$username
 		);
@@ -151,7 +169,7 @@ class topic extends \phpbb\notification\type\base
 	*/
 	public function get_reference()
 	{
-		return $this->user->lang(
+		return $this->language->lang(
 			'NOTIFICATION_REFERENCE',
 			censor_text($this->get_data('topic_title'))
 		);
@@ -164,7 +182,7 @@ class topic extends \phpbb\notification\type\base
 	*/
 	public function get_forum()
 	{
-		return $this->user->lang(
+		return $this->language->lang(
 			'NOTIFICATION_FORUM',
 			$this->get_data('forum_name')
 		);
@@ -243,7 +261,7 @@ class topic extends \phpbb\notification\type\base
 	*/
 	public function pre_create_insert_array($post, $notify_users)
 	{
-		if (!sizeof($notify_users) || !$this->inherit_read_status)
+		if (!count($notify_users) || !$this->inherit_read_status)
 		{
 			return array();
 		}
@@ -263,13 +281,7 @@ class topic extends \phpbb\notification\type\base
 	}
 
 	/**
-	* Function for preparing the data for insertion in an SQL query
-	* (The service handles insertion)
-	*
-	* @param array $post Data from submit_post
-	* @param array $pre_create_data Data from pre_create_insert_array()
-	*
-	* @return array Array of data ready to be inserted into the database
+	* {@inheritdoc}
 	*/
 	public function create_insert_array($post, $pre_create_data = array())
 	{
@@ -290,6 +302,6 @@ class topic extends \phpbb\notification\type\base
 			$this->notification_read = true;
 		}
 
-		return parent::create_insert_array($post, $pre_create_data);
+		parent::create_insert_array($post, $pre_create_data);
 	}
 }
diff --git a/phpBB/phpbb/notification/type/topic_in_queue.php b/phpBB/phpbb/notification/type/topic_in_queue.php
index 6e57b9ac0c..2d732b9cd7 100644
--- a/phpBB/phpbb/notification/type/topic_in_queue.php
+++ b/phpBB/phpbb/notification/type/topic_in_queue.php
@@ -43,7 +43,7 @@ class topic_in_queue extends \phpbb\notification\type\topic
 	* @var bool|array False if the service should use it's default data
 	* 					Array of data (including keys 'id', 'lang', and 'group')
 	*/
-	public static $notification_option = array(
+	static public $notification_option = array(
 		'id'	=> 'notification.type.needs_approval',
 		'lang'	=> 'NOTIFICATION_TYPE_IN_MODERATION_QUEUE',
 		'group'	=> 'NOTIFICATION_GROUP_MODERATION',
@@ -123,19 +123,22 @@ class topic_in_queue extends \phpbb\notification\type\topic
 	}
 
 	/**
-	* Function for preparing the data for insertion in an SQL query
-	* (The service handles insertion)
-	*
-	* @param array $topic Data from submit_post
-	* @param array $pre_create_data Data from pre_create_insert_array()
-	*
-	* @return array Array of data ready to be inserted into the database
+	* {@inheritdoc}
 	*/
 	public function create_insert_array($topic, $pre_create_data = array())
 	{
-		$data = parent::create_insert_array($topic, $pre_create_data);
+		parent::create_insert_array($topic, $pre_create_data);
+
+		$this->notification_time = time();
+	}
 
-		$this->notification_time = $data['notification_time'] = time();
+	/**
+	* {@inheritdoc}
+	*/
+	public function get_insert_array()
+	{
+		$data = parent::get_insert_array();
+		$data['notification_time'] = $this->notification_time;
 
 		return $data;
 	}
diff --git a/phpBB/phpbb/notification/type/type_interface.php b/phpBB/phpbb/notification/type/type_interface.php
index 5c5a110836..f9f832bdda 100644
--- a/phpBB/phpbb/notification/type/type_interface.php
+++ b/phpBB/phpbb/notification/type/type_interface.php
@@ -37,14 +37,14 @@ interface type_interface
 	*
 	* @param array $type_data The type specific data
 	*/
-	public static function get_item_id($type_data);
+	static public function get_item_id($type_data);
 
 	/**
 	* Get the id of the parent
 	*
 	* @param array $type_data The type specific data
 	*/
-	public static function get_item_parent_id($type_data);
+	static public function get_item_parent_id($type_data);
 
 	/**
 	* Is this type available to the current user (defines whether or not it will be shown in the UCP Edit notification options)
@@ -177,14 +177,18 @@ interface type_interface
 
 	/**
 	* Function for preparing the data for insertion in an SQL query
-	* (The service handles insertion)
 	*
 	* @param array $type_data The type specific data
 	* @param array $pre_create_data Data from pre_create_insert_array()
+	*/
+	public function create_insert_array($type_data, $pre_create_data);
+
+	/**
+	* Function for getting the data for insertion in an SQL query
 	*
 	* @return array Array of data ready to be inserted into the database
 	*/
-	public function create_insert_array($type_data, $pre_create_data);
+	public function get_insert_array();
 
 	/**
 	* Function for preparing the data for update in an SQL query
@@ -202,7 +206,7 @@ interface type_interface
 	* @param bool $return True to return a string containing the SQL code to update this item, False to execute it (Default: False)
 	* @return string
 	*/
-	public function mark_read($return);
+	public function mark_read($return = false);
 
 	/**
 	* Mark this item unread
@@ -210,5 +214,5 @@ interface type_interface
 	* @param bool $return True to return a string containing the SQL code to update this item, False to execute it (Default: False)
 	* @return string
 	*/
-	public function mark_unread($return);
+	public function mark_unread($return = false);
 }
diff --git a/phpBB/phpbb/pagination.php b/phpBB/phpbb/pagination.php
index 7a81c25ad2..a7086f6691 100644
--- a/phpBB/phpbb/pagination.php
+++ b/phpBB/phpbb/pagination.php
@@ -46,7 +46,7 @@ class pagination
 	/**
 	* Generate a pagination link based on the url and the page information
 	*
-	* @param string $base_url is url prepended to all links generated within the function
+	* @param string|array $base_url is url prepended to all links generated within the function
 	*							If you use page numbers inside your controller route, base_url should contains a placeholder (%d)
 	*							for the page. Also be sure to specify the pagination path information into the start_name argument
 	* @param string $on_page is the page for which we want to generate the link
@@ -69,7 +69,7 @@ class pagination
 		* set $generate_page_link_override to the new URL value
 		*
 		* @event core.pagination_generate_page_link
-		* @var string base_url is url prepended to all links generated within the function
+		* @var string|array base_url is url prepended to all links generated within the function
 		*							If you use page numbers inside your controller route, base_url should contains a placeholder (%d)
 		*							for the page. Also be sure to specify the pagination path information into the start_name argument
 		* @var string on_page is the page for which we want to generate the link
@@ -120,7 +120,7 @@ class pagination
 	* Generate template rendered pagination
 	* Allows full control of rendering of pagination with the template
 	*
-	* @param string $base_url is url prepended to all links generated within the function
+	* @param string|array $base_url is url prepended to all links generated within the function
 	*							If you use page numbers inside your controller route, base_url should contains a placeholder (%d)
 	*							for the page. Also be sure to specify the pagination path information into the start_name argument
 	* @param string $block_var_name is the name assigned to the pagination data block within the template (example: <!-- BEGIN pagination -->)
@@ -132,10 +132,15 @@ class pagination
 	* @param int $start the item which should be considered currently active, used to determine the page we're on
 	* @param bool $reverse_count determines whether we weight display of the list towards the start (false) or end (true) of the list
 	* @param bool $ignore_on_page decides whether we enable an active (unlinked) item, used primarily for embedded lists
-	* @return null
+	* @return void
 	*/
 	public function generate_template_pagination($base_url, $block_var_name, $start_name, $num_items, $per_page, $start = 1, $reverse_count = false, $ignore_on_page = false)
 	{
+		if (empty($base_url))
+		{
+			return;
+		}
+
 		$total_pages = ceil($num_items / $per_page);
 		$on_page = $this->get_on_page($per_page, $start);
 		$u_previous_page = $u_next_page = '';
@@ -284,7 +289,7 @@ class pagination
 	*/
 	public function get_on_page($per_page, $start)
 	{
-		return floor($start / $per_page) + 1;
+		return floor((int) $start / (int) $per_page) + 1;
 	}
 
 	/**
diff --git a/phpBB/phpbb/passwords/driver/base.php b/phpBB/phpbb/passwords/driver/base.php
index fd07a61bf4..0997b5b700 100644
--- a/phpBB/phpbb/passwords/driver/base.php
+++ b/phpBB/phpbb/passwords/driver/base.php
@@ -13,7 +13,7 @@
 
 namespace phpbb\passwords\driver;
 
-abstract class base implements driver_interface
+abstract class base implements rehashable_driver_interface
 {
 	/** @var \phpbb\config\config */
 	protected $config;
@@ -21,7 +21,7 @@ abstract class base implements driver_interface
 	/** @var \phpbb\passwords\driver\helper */
 	protected $helper;
 
-	/** @var driver name */
+	/** @var string Driver name */
 	protected $name;
 
 	/**
@@ -53,6 +53,14 @@ abstract class base implements driver_interface
 	}
 
 	/**
+	 * {@inheritdoc}
+	 */
+	public function needs_rehash($hash)
+	{
+		return false;
+	}
+
+	/**
 	* {@inheritdoc}
 	*/
 	public function get_settings_only($hash, $full = false)
diff --git a/phpBB/phpbb/passwords/driver/bcrypt.php b/phpBB/phpbb/passwords/driver/bcrypt.php
index eab1c3d569..eb1aeeeb76 100644
--- a/phpBB/phpbb/passwords/driver/bcrypt.php
+++ b/phpBB/phpbb/passwords/driver/bcrypt.php
@@ -17,6 +17,24 @@ class bcrypt extends base
 {
 	const PREFIX = '$2a$';
 
+	/** @var int Hashing cost factor */
+	protected $cost_factor;
+
+	/**
+	 * Constructor of passwords driver object
+	 *
+	 * @param \phpbb\config\config $config phpBB config
+	 * @param \phpbb\passwords\driver\helper $helper Password driver helper
+	 * @param int $cost_factor Hashing cost factor (optional)
+	 */
+	public function __construct(\phpbb\config\config $config, helper $helper, $cost_factor = 10)
+	{
+		parent::__construct($config, $helper);
+
+		// Don't allow cost factor to be below default setting
+		$this->cost_factor = max(10, $cost_factor);
+	}
+
 	/**
 	* {@inheritdoc}
 	*/
@@ -26,6 +44,18 @@ class bcrypt extends base
 	}
 
 	/**
+	 * {@inheritdoc}
+	 */
+	public function needs_rehash($hash)
+	{
+		preg_match('/^' . preg_quote($this->get_prefix()) . '([0-9]+)\$/', $hash, $matches);
+
+		list(, $cost_factor) = $matches;
+
+		return empty($cost_factor) || $this->cost_factor !== intval($cost_factor);
+	}
+
+	/**
 	* {@inheritdoc}
 	*/
 	public function hash($password, $salt = '')
@@ -46,7 +76,7 @@ class bcrypt extends base
 
 		if ($salt == '')
 		{
-			$salt = $prefix . '10$' . $this->get_random_salt();
+			$salt = $prefix . $this->cost_factor . '$' . $this->get_random_salt();
 		}
 
 		$hash = crypt($password, $salt);
diff --git a/phpBB/phpbb/passwords/driver/md5_phpbb2.php b/phpBB/phpbb/passwords/driver/md5_phpbb2.php
index bd8cc51e5a..b38b041d6c 100644
--- a/phpBB/phpbb/passwords/driver/md5_phpbb2.php
+++ b/phpBB/phpbb/passwords/driver/md5_phpbb2.php
@@ -95,7 +95,7 @@ class md5_phpbb2 extends base
 
 		// in phpBB2 passwords were used exactly as they were sent, with addslashes applied
 		$password_old_format = isset($_REQUEST['password']) ? (string) $_REQUEST['password'] : '';
-		$password_old_format = (!STRIP) ? addslashes($password_old_format) : $password_old_format;
+		$password_old_format = addslashes($password_old_format);
 		$password_new_format = $this->request->variable('password', '', true);
 
 		if ($super_globals_disabled)
diff --git a/phpBB/phpbb/passwords/driver/rehashable_driver_interface.php b/phpBB/phpbb/passwords/driver/rehashable_driver_interface.php
new file mode 100644
index 0000000000..ca30748502
--- /dev/null
+++ b/phpBB/phpbb/passwords/driver/rehashable_driver_interface.php
@@ -0,0 +1,25 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\passwords\driver;
+
+interface rehashable_driver_interface extends driver_interface
+{
+	/**
+	 * Check if password needs to be rehashed
+	 *
+	 * @param string $hash Hash to check for rehash
+	 * @return bool True if password needs to be rehashed, false if not
+	 */
+	public function needs_rehash($hash);
+}
diff --git a/phpBB/phpbb/passwords/manager.php b/phpBB/phpbb/passwords/manager.php
index aa9147ecf4..fad76a9fe5 100644
--- a/phpBB/phpbb/passwords/manager.php
+++ b/phpBB/phpbb/passwords/manager.php
@@ -50,21 +50,47 @@ class manager
 	protected $config;
 
 	/**
+	 * @var bool Whether or not initialized() has been called
+	 */
+	private $initialized = false;
+
+	/**
+	 * @var array Hashing driver service collection
+	 */
+	private $hashing_algorithms;
+
+	/**
+	 * @var array List of default driver types
+	 */
+	private $defaults;
+
+	/**
 	* Construct a passwords object
 	*
-	* @param \phpbb\config\config $config phpBB configuration
-	* @param array $hashing_algorithms Hashing driver
-	*			service collection
-	* @param \phpbb\passwords\helper $helper Passwords helper object
-	* @param array $defaults List of default driver types
+	* @param \phpbb\config\config		$config				phpBB configuration
+	* @param array						$hashing_algorithms	Hashing driver service collection
+	* @param \phpbb\passwords\helper	$helper				Passwords helper object
+	* @param array						$defaults			List of default driver types
 	*/
 	public function __construct(\phpbb\config\config $config, $hashing_algorithms, helper $helper, $defaults)
 	{
 		$this->config = $config;
 		$this->helper = $helper;
+		$this->hashing_algorithms = $hashing_algorithms;
+		$this->defaults = $defaults;
+	}
 
-		$this->fill_type_map($hashing_algorithms);
-		$this->register_default_type($defaults);
+	/**
+	 * Initialize the internal state
+	 */
+	protected function initialize()
+	{
+		if (!$this->initialized)
+		{
+			$this->initialized = true;
+			$this->fill_type_map($this->hashing_algorithms);
+			$this->register_default_type($this->defaults);
+		}
 	}
 
 	/**
@@ -144,9 +170,11 @@ class manager
 			return false;
 		}
 
+		$this->initialize();
+
 		// Be on the lookout for multiple hashing algorithms
 		// 2 is correct: H\2a > 2, H\P > 2
-		if (strlen($match[1]) > 2)
+		if (strlen($match[1]) > 2 && strpos($match[1], '\\') !== false)
 		{
 			$hash_types = explode('\\', $match[1]);
 			$return_ary = array();
@@ -192,6 +220,8 @@ class manager
 			return false;
 		}
 
+		$this->initialize();
+
 		// Try to retrieve algorithm by service name if type doesn't
 		// start with dollar sign
 		if (!is_array($type) && strpos($type, '$') !== 0 && isset($this->algorithms[$type]))
@@ -242,6 +272,8 @@ class manager
 			return false;
 		}
 
+		$this->initialize();
+
 		// First find out what kind of hash we're dealing with
 		$stored_hash_type = $this->detect_algorithm($hash);
 		if ($stored_hash_type == false)
@@ -265,7 +297,14 @@ class manager
 		}
 		else
 		{
-			$this->convert_flag = false;
+			if ($stored_hash_type instanceof driver\rehashable_driver_interface)
+			{
+				$this->convert_flag = $stored_hash_type->needs_rehash($hash);
+			}
+			else
+			{
+				$this->convert_flag = false;
+			}
 		}
 
 		// Check all legacy hash types if prefix is $CP$
@@ -297,6 +336,8 @@ class manager
 	*/
 	public function combined_hash_password($password_hash, $type)
 	{
+		$this->initialize();
+
 		$data = array(
 			'prefix' => '$',
 			'settings' => '$',
diff --git a/phpBB/phpbb/path_helper.php b/phpBB/phpbb/path_helper.php
index 5400c1c5a6..5b6db35f23 100644
--- a/phpBB/phpbb/path_helper.php
+++ b/phpBB/phpbb/path_helper.php
@@ -21,7 +21,7 @@ class path_helper
 	/** @var \phpbb\symfony_request */
 	protected $symfony_request;
 
-	/** @var \phpbb\filesystem */
+	/** @var \phpbb\filesystem\filesystem_interface */
 	protected $filesystem;
 
 	/** @var \phpbb\request\request_interface */
@@ -43,13 +43,13 @@ class path_helper
 	* Constructor
 	*
 	* @param \phpbb\symfony_request $symfony_request
-	* @param \phpbb\filesystem $filesystem
+	* @param \phpbb\filesystem\filesystem_interface $filesystem
 	* @param \phpbb\request\request_interface $request
 	* @param string $phpbb_root_path Relative path to phpBB root
 	* @param string $php_ext PHP file extension
 	* @param mixed $adm_relative_path Relative path admin path to adm/ root
 	*/
-	public function __construct(\phpbb\symfony_request $symfony_request, \phpbb\filesystem $filesystem, \phpbb\request\request_interface $request, $phpbb_root_path, $php_ext, $adm_relative_path = null)
+	public function __construct(\phpbb\symfony_request $symfony_request, \phpbb\filesystem\filesystem_interface $filesystem, \phpbb\request\request_interface $request, $phpbb_root_path, $php_ext, $adm_relative_path = null)
 	{
 		$this->symfony_request = $symfony_request;
 		$this->filesystem = $filesystem;
@@ -100,11 +100,18 @@ class path_helper
 	*/
 	public function update_web_root_path($path)
 	{
+		$web_root_path = $this->get_web_root_path();
+
+		// Removes the web root path if it is already present
+		if (strpos($path, $web_root_path) === 0)
+		{
+			$path = $this->phpbb_root_path . substr($path, strlen($web_root_path));
+		}
+
 		if (strpos($path, $this->phpbb_root_path) === 0)
 		{
 			$path = substr($path, strlen($this->phpbb_root_path));
 
-			$web_root_path = $this->get_web_root_path();
 			if (substr($web_root_path, -8) === 'app.php/' && substr($path, 0, 7) === 'app.php')
 			{
 				$path = substr($path, 8);
@@ -489,4 +496,17 @@ class path_helper
 
 		return $page;
 	}
+
+	/**
+	 * Tells if the router is currently in use (if the current page is a route or not)
+	 *
+	 * @return bool
+	 */
+	public function is_router_used()
+	{
+		// Script name URI (e.g. phpBB/app.php)
+		$script_name = $this->symfony_request->getScriptName();
+
+		return basename($script_name) === 'app.' . $this->php_ext;
+	}
 }
diff --git a/phpBB/phpbb/permissions.php b/phpBB/phpbb/permissions.php
index e75476f59b..236535cc6a 100644
--- a/phpBB/phpbb/permissions.php
+++ b/phpBB/phpbb/permissions.php
@@ -234,6 +234,7 @@ class permissions
 		'u_savedrafts'	=> array('lang' => 'ACL_U_SAVEDRAFTS', 'cat' => 'post'),
 		'u_chgcensors'	=> array('lang' => 'ACL_U_CHGCENSORS', 'cat' => 'post'),
 		'u_sig'			=> array('lang' => 'ACL_U_SIG', 'cat' => 'post'),
+		'u_emoji'		=> array('lang' => 'ACL_U_EMOJI', 'cat' => 'post'),
 
 		'u_sendpm'		=> array('lang' => 'ACL_U_SENDPM', 'cat' => 'pm'),
 		'u_masspm'		=> array('lang' => 'ACL_U_MASSPM', 'cat' => 'pm'),
@@ -260,6 +261,7 @@ class permissions
 
 		// Forum Permissions
 		'f_list'		=> array('lang' => 'ACL_F_LIST', 'cat' => 'actions'),
+		'f_list_topics' => array('lang' => 'ACL_F_LIST_TOPICS', 'cat' => 'actions'),
 		'f_read'		=> array('lang' => 'ACL_F_READ', 'cat' => 'actions'),
 		'f_search'		=> array('lang' => 'ACL_F_SEARCH', 'cat' => 'actions'),
 		'f_subscribe'	=> array('lang' => 'ACL_F_SUBSCRIBE', 'cat' => 'actions'),
@@ -273,6 +275,7 @@ class permissions
 		'f_post'		=> array('lang' => 'ACL_F_POST', 'cat' => 'post'),
 		'f_sticky'		=> array('lang' => 'ACL_F_STICKY', 'cat' => 'post'),
 		'f_announce'	=> array('lang' => 'ACL_F_ANNOUNCE', 'cat' => 'post'),
+		'f_announce_global'	=> array('lang' => 'ACL_F_ANNOUNCE_GLOBAL', 'cat' => 'post'),
 		'f_reply'		=> array('lang' => 'ACL_F_REPLY', 'cat' => 'post'),
 		'f_edit'		=> array('lang' => 'ACL_F_EDIT', 'cat' => 'post'),
 		'f_delete'		=> array('lang' => 'ACL_F_DELETE', 'cat' => 'post'),
diff --git a/phpBB/phpbb/plupload/plupload.php b/phpBB/phpbb/plupload/plupload.php
index 04d681cea6..5a5b8a1874 100644
--- a/phpBB/phpbb/plupload/plupload.php
+++ b/phpBB/phpbb/plupload/plupload.php
@@ -39,7 +39,7 @@ class plupload
 	protected $user;
 
 	/**
-	* @var \phpbb\php\ini
+	* @var \bantu\IniGetWrapper\IniGetWrapper
 	*/
 	protected $php_ini;
 
@@ -67,10 +67,10 @@ class plupload
 	* @param \phpbb\config\config $config
 	* @param \phpbb\request\request_interface $request
 	* @param \phpbb\user $user
-	* @param \phpbb\php\ini $php_ini
+	* @param \bantu\IniGetWrapper\IniGetWrapper $php_ini
 	* @param \phpbb\mimetype\guesser $mimetype_guesser
 	*/
-	public function __construct($phpbb_root_path, \phpbb\config\config $config, \phpbb\request\request_interface $request, \phpbb\user $user, \phpbb\php\ini $php_ini, \phpbb\mimetype\guesser $mimetype_guesser)
+	public function __construct($phpbb_root_path, \phpbb\config\config $config, \phpbb\request\request_interface $request, \phpbb\user $user, \bantu\IniGetWrapper\IniGetWrapper $php_ini, \phpbb\mimetype\guesser $mimetype_guesser)
 	{
 		$this->phpbb_root_path = $phpbb_root_path;
 		$this->config = $config;
@@ -216,38 +216,36 @@ class plupload
 	}
 
 	/**
-	* Looks at the list of allowed extensions and generates a string
-	* appropriate for use in configuring plupload with
-	*
-	* @param \phpbb\cache\service $cache
-	* @param string $forum_id The ID of the forum
-	*
-	* @return string
-	*/
+	 * Looks at the list of allowed extensions and generates a string
+	 * appropriate for use in configuring plupload with
+	 *
+	 * @param \phpbb\cache\service	$cache		Cache service object
+	 * @param string				$forum_id	The forum identifier
+	 *
+	 * @return string
+	 */
 	public function generate_filter_string(\phpbb\cache\service $cache, $forum_id)
 	{
+		$groups = [];
+		$filters = [];
+
 		$attach_extensions = $cache->obtain_attach_extensions($forum_id);
 		unset($attach_extensions['_allowed_']);
-		$groups = array();
 
 		// Re-arrange the extension array to $groups[$group_name][]
 		foreach ($attach_extensions as $extension => $extension_info)
 		{
-			if (!isset($groups[$extension_info['group_name']]))
-			{
-				$groups[$extension_info['group_name']] = array();
-			}
-
-			$groups[$extension_info['group_name']][] = $extension;
+			$groups[$extension_info['group_name']]['extensions'][] = $extension;
+			$groups[$extension_info['group_name']]['max_file_size'] = (int) $extension_info['max_filesize'];
 		}
 
-		$filters = array();
-		foreach ($groups as $group => $extensions)
+		foreach ($groups as $group => $group_info)
 		{
 			$filters[] = sprintf(
-				"{title: '%s', extensions: '%s'}",
+				"{title: '%s', extensions: '%s', max_file_size: %s}",
 				addslashes(ucfirst(strtolower($group))),
-				addslashes(implode(',', $extensions))
+				addslashes(implode(',', $group_info['extensions'])),
+				$group_info['max_file_size']
 			);
 		}
 
@@ -276,22 +274,37 @@ class plupload
 	}
 
 	/**
-	* Checks various php.ini values and the maximum file size to determine
-	* the maximum size chunks a file can be split up into for upload
-	*
-	* @return int
-	*/
+	 * Checks various php.ini values to determine the maximum chunk
+	 * size a file should be split into for upload.
+	 *
+	 * The intention is to calculate a value which reflects whatever
+	 * the most restrictive limit is set to.  And to then set the chunk
+	 * size to half that value, to ensure any required transfer overhead
+	 * and POST data remains well within the limit.  Or, if all of the
+	 * limits are set to unlimited, the chunk size will also be unlimited.
+	 *
+	 * @return int
+	 *
+	 * @access public
+	 */
 	public function get_chunk_size()
 	{
-		$max = min(
-			$this->php_ini->get_bytes('upload_max_filesize'),
-			$this->php_ini->get_bytes('post_max_size'),
-			max(1, $this->php_ini->get_bytes('memory_limit')),
-			$this->config['max_filesize']
-		);
+		$max = 0;
+
+		$limits = [
+			$this->php_ini->getBytes('memory_limit'),
+			$this->php_ini->getBytes('upload_max_filesize'),
+			$this->php_ini->getBytes('post_max_size'),
+		];
+
+		foreach ($limits as $limit_type)
+		{
+			if ($limit_type > 0)
+			{
+				$max = ($max !== 0) ? min($limit_type, $max) : $limit_type;
+			}
+		}
 
-		// Use half of the maximum possible to leave plenty of room for other
-		// POST data.
 		return floor($max / 2);
 	}
 
@@ -303,7 +316,7 @@ class plupload
 			$this->temporary_directory,
 			$this->config['plupload_salt'],
 			md5($file_name),
-			\filespec::get_extension($file_name)
+			\phpbb\files\filespec::get_extension($file_name)
 		);
 	}
 
diff --git a/phpBB/phpbb/profilefields/manager.php b/phpBB/phpbb/profilefields/manager.php
index ea4b24af56..35b18ddf07 100644
--- a/phpBB/phpbb/profilefields/manager.php
+++ b/phpBB/phpbb/profilefields/manager.php
@@ -230,7 +230,7 @@ class manager
 	*/
 	public function update_profile_field_data($user_id, $cp_data)
 	{
-		if (!sizeof($cp_data))
+		if (!count($cp_data))
 		{
 			return;
 		}
@@ -258,7 +258,7 @@ class manager
 	*/
 	public function generate_profile_fields_template_headlines($restrict_option = '')
 	{
-		if (!sizeof($this->profile_cache))
+		if (!count($this->profile_cache))
 		{
 			$this->build_cache();
 		}
@@ -318,12 +318,12 @@ class manager
 			$user_ids = array($user_ids);
 		}
 
-		if (!sizeof($this->profile_cache))
+		if (!count($this->profile_cache))
 		{
 			$this->build_cache();
 		}
 
-		if (!sizeof($user_ids))
+		if (!count($user_ids))
 		{
 			return array();
 		}
@@ -486,7 +486,7 @@ class manager
 		$sql = 'SELECT f.field_type, f.field_ident, f.field_default_value, l.lang_default_value
 			FROM ' . $this->fields_language_table . ' l, ' . $this->fields_table . ' f
 			WHERE l.lang_id = ' . $this->user->get_iso_lang_id() . '
-				' . ((sizeof($sql_not_in)) ? ' AND ' . $this->db->sql_in_set('f.field_ident', $sql_not_in, true) : '') . '
+				' . ((count($sql_not_in)) ? ' AND ' . $this->db->sql_in_set('f.field_ident', $sql_not_in, true) : '') . '
 				AND l.field_id = f.field_id';
 		$result = $this->db->sql_query($sql);
 
diff --git a/phpBB/phpbb/profilefields/type/type_bool.php b/phpBB/phpbb/profilefields/type/type_bool.php
index f6f3f17a6c..9c09e27bc4 100644
--- a/phpBB/phpbb/profilefields/type/type_bool.php
+++ b/phpBB/phpbb/profilefields/type/type_bool.php
@@ -398,7 +398,7 @@ class type_bool extends type_base
 	public function display_options(&$template_vars, &$field_data)
 	{
 		// Initialize these array elements if we are creating a new field
-		if (!sizeof($field_data['lang_options']))
+		if (!count($field_data['lang_options']))
 		{
 			// No options have been defined for a boolean field.
 			$field_data['lang_options'][0] = '';
diff --git a/phpBB/phpbb/profilefields/type/type_date.php b/phpBB/phpbb/profilefields/type/type_date.php
index 63a0c79a3d..5a1a6dbd5c 100644
--- a/phpBB/phpbb/profilefields/type/type_date.php
+++ b/phpBB/phpbb/profilefields/type/type_date.php
@@ -72,7 +72,7 @@ class type_date extends type_base
 			'lang_options'			=> $field_data['lang_options'],
 		);
 
-		$always_now = request_var('always_now', -1);
+		$always_now = $this->request->variable('always_now', -1);
 		if ($always_now == -1)
 		{
 			$s_checked = ($field_data['field_default_value'] == 'now') ? true : false;
diff --git a/phpBB/phpbb/profilefields/type/type_dropdown.php b/phpBB/phpbb/profilefields/type/type_dropdown.php
index 17ae89e1b2..d54404bbb4 100644
--- a/phpBB/phpbb/profilefields/type/type_dropdown.php
+++ b/phpBB/phpbb/profilefields/type/type_dropdown.php
@@ -282,7 +282,7 @@ class type_dropdown extends type_base
 	*/
 	public function validate_options_on_submit($error, $field_data)
 	{
-		if (!sizeof($field_data['lang_options']))
+		if (!count($field_data['lang_options']))
 		{
 			$error[] = $this->user->lang['NO_FIELD_ENTRIES'];
 		}
@@ -298,7 +298,7 @@ class type_dropdown extends type_base
 		if ($step == 2 && $key == 'field_maxlen')
 		{
 			// Get the number of options if this key is 'field_maxlen'
-			return sizeof(explode("\n", $this->request->variable('lang_options', '', true)));
+			return count(explode("\n", $this->request->variable('lang_options', '', true)));
 		}
 
 		return parent::get_excluded_options($key, $action, $current_value, $field_data, $step);
@@ -310,7 +310,7 @@ class type_dropdown extends type_base
 	public function display_options(&$template_vars, &$field_data)
 	{
 		// Initialize these array elements if we are creating a new field
-		if (!sizeof($field_data['lang_options']))
+		if (!count($field_data['lang_options']))
 		{
 			// No options have been defined for the dropdown menu
 			$field_data['lang_options'] = array();
diff --git a/phpBB/phpbb/profilefields/type/type_url.php b/phpBB/phpbb/profilefields/type/type_url.php
index 375cf5b19a..37815b66a5 100644
--- a/phpBB/phpbb/profilefields/type/type_url.php
+++ b/phpBB/phpbb/profilefields/type/type_url.php
@@ -64,11 +64,24 @@ class type_url extends type_string
 			return false;
 		}
 
-		if (!preg_match('#^' . get_preg_expression('url') . '$#iu', $field_value))
+		if (!preg_match('#^' . get_preg_expression('url_http') . '$#iu', $field_value))
 		{
 			return $this->user->lang('FIELD_INVALID_URL', $this->get_field_name($field_data['lang_name']));
 		}
 
 		return false;
 	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	public function get_profile_value($field_value, $field_data)
+	{
+		if (!preg_match('#^' . get_preg_expression('url_http') . '$#iu', $field_value))
+		{
+			return null;
+		}
+
+		return parent::get_profile_value($field_value, $field_data);
+	}
 }
diff --git a/phpBB/phpbb/report/controller/report.php b/phpBB/phpbb/report/controller/report.php
new file mode 100644
index 0000000000..0aa6833dfa
--- /dev/null
+++ b/phpBB/phpbb/report/controller/report.php
@@ -0,0 +1,319 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\report\controller;
+
+use phpbb\exception\http_exception;
+use Symfony\Component\HttpFoundation\RedirectResponse;
+
+class report
+{
+	/**
+	 * @var \phpbb\config\config
+	 */
+	protected $config;
+
+	/**
+	 * @var \phpbb\user
+	 */
+	protected $user;
+
+	/**
+	 * @var \phpbb\template\template
+	 */
+	protected $template;
+
+	/**
+	 * @var \phpbb\controller\helper
+	 */
+	protected $helper;
+
+	/**
+	 * @var \phpbb\request\request_interface
+	 */
+	protected $request;
+
+	/**
+	 * @var \phpbb\captcha\factory
+	 */
+	protected $captcha_factory;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * @var string
+	 */
+	protected $php_ext;
+
+	/**
+	 * @var \phpbb\report\report_handler_interface
+	 */
+	protected $report_handler;
+
+	/**
+	 * @var \phpbb\report\report_reason_list_provider
+	 */
+	protected $report_reason_provider;
+
+	public function __construct(\phpbb\config\config $config, \phpbb\user $user, \phpbb\template\template $template, \phpbb\controller\helper $helper, \phpbb\request\request_interface $request, \phpbb\captcha\factory $captcha_factory, \phpbb\report\handler_factory $report_factory, \phpbb\report\report_reason_list_provider $ui_provider, $phpbb_root_path, $php_ext)
+	{
+		$this->config			= $config;
+		$this->user				= $user;
+		$this->template			= $template;
+		$this->helper			= $helper;
+		$this->request			= $request;
+		$this->phpbb_root_path	= $phpbb_root_path;
+		$this->php_ext			= $php_ext;
+		$this->captcha_factory	= $captcha_factory;
+		$this->report_handler	= $report_factory;
+
+		// User interface factory
+		$this->report_reason_provider = $ui_provider;
+	}
+
+	/**
+	 * Controller for /path_to_entities/{id}/report routes
+	 *
+	 * Because of how phpBB organizes routes $mode must be set in the route config.
+	 *
+	 * @param int		$id		ID of the entity to report
+	 * @param string	$mode
+	 * @return \Symfony\Component\HttpFoundation\Response a Symfony response object
+	 * @throws \phpbb\exception\http_exception when $mode or $id is invalid for some reason
+	 */
+	public function handle($id, $mode)
+	{
+		// Get report handler
+		$this->report_handler = $this->report_handler->get_instance($mode);
+
+		$this->user->add_lang('mcp');
+
+		$user_notify	= ($this->user->data['is_registered']) ? $this->request->variable('notify', 0) : false;
+		$reason_id		= $this->request->variable('reason_id', 0);
+		$report_text	= $this->request->variable('report_text', '', true);
+
+		$submit = $this->request->variable('submit', '');
+		$cancel = $this->request->variable('cancel', '');
+
+		$error = array();
+		$s_hidden_fields = '';
+
+		$redirect_url = append_sid(
+			$this->phpbb_root_path . ( ($mode === 'pm') ? 'ucp' : 'viewtopic' ) . ".{$this->php_ext}",
+			($mode == 'pm') ? "i=pm&mode=view&p=$id" : "p=$id"
+		);
+		$redirect_url .= ($mode === 'post') ? "#p$id" : '';
+
+		// Set up CAPTCHA if necessary
+		if ($this->config['enable_post_confirm'] && !$this->user->data['is_registered'])
+		{
+			$captcha = $this->captcha_factory->get_instance($this->config['captcha_plugin']);
+			$captcha->init(CONFIRM_REPORT);
+		}
+
+		//Has the report been cancelled?
+		if (!empty($cancel))
+		{
+			return new RedirectResponse($redirect_url, 302);
+		}
+
+		// Check CAPTCHA, if the form was submited
+		if (!empty($submit) && isset($captcha))
+		{
+			$captcha_template_array = $this->check_captcha($captcha);
+			$error = $captcha_template_array['error'];
+			$s_hidden_fields = $captcha_template_array['hidden_fields'];
+		}
+
+		// Handle request
+		try
+		{
+			if (!empty($submit) && count($error) === 0)
+			{
+				$this->report_handler->add_report(
+					(int) $id,
+					(int) $reason_id,
+					(string) $report_text,
+					(int) $user_notify
+				);
+
+				// Send success message
+				switch ($mode)
+				{
+					case 'pm':
+						$lang_return = $this->user->lang['RETURN_PM'];
+						$lang_success = $this->user->lang['PM_REPORTED_SUCCESS'];
+					break;
+					case 'post':
+						$lang_return = $this->user->lang['RETURN_TOPIC'];
+						$lang_success = $this->user->lang['POST_REPORTED_SUCCESS'];
+					break;
+				}
+
+				$this->helper->assign_meta_refresh_var(3, $redirect_url);
+				$message = $lang_success . '<br /><br />' . sprintf($lang_return, '<a href="' . $redirect_url . '">', '</a>');
+				return $this->helper->message($message);
+			}
+			else
+			{
+				$this->report_handler->validate_report_request($id);
+			}
+		}
+		catch (\phpbb\report\exception\pm_reporting_disabled_exception $exception)
+		{
+			throw new http_exception(404, 'PAGE_NOT_FOUND');
+		}
+		catch (\phpbb\report\exception\already_reported_exception $exception)
+		{
+			switch ($mode)
+			{
+				case 'pm':
+					$message = $this->user->lang['ALREADY_REPORTED_PM'];
+					$message .= '<br /><br />' . sprintf($this->user->lang['RETURN_PM'], '<a href="' . $redirect_url . '">', '</a>');
+				break;
+				case 'post':
+					$message = $this->user->lang['ALREADY_REPORTED'];
+					$message .= '<br /><br />' . sprintf($this->user->lang['RETURN_TOPIC'], '<a href="' . $redirect_url . '">', '</a>');
+				break;
+			}
+
+			return $this->helper->message($message);
+		}
+		catch (\phpbb\report\exception\report_permission_denied_exception $exception)
+		{
+			$message = $exception->getMessage();
+			if (isset($this->user->lang[$message]))
+			{
+				$message = $this->user->lang[$message];
+			}
+
+			throw new http_exception(403, $message);
+		}
+		catch (\phpbb\report\exception\entity_not_found_exception $exception)
+		{
+			$message = $exception->getMessage();
+			if (isset($this->user->lang[$message]))
+			{
+				$message = $this->user->lang[$message];
+			}
+
+			throw new http_exception(404, $message);
+		}
+		catch (\phpbb\report\exception\empty_report_exception $exception)
+		{
+			$error[] = $this->user->lang['EMPTY_REPORT'];
+		}
+		catch (\phpbb\report\exception\invalid_report_exception $exception)
+		{
+			return $this->helper->message($exception->getMessage());
+		}
+
+		// Setting up an rendering template
+		$page_title = ($mode === 'pm') ? $this->user->lang['REPORT_MESSAGE'] : $this->user->lang['REPORT_POST'];
+		$this->assign_template_data(
+			$mode,
+			$id,
+			$reason_id,
+			$report_text,
+			$user_notify,
+			$error,
+			$s_hidden_fields,
+			( isset($captcha) ? $captcha : false )
+		);
+
+		return $this->helper->render('report_body.html', $page_title);
+	}
+
+	/**
+	 * Assigns template variables
+	 *
+	 * @param	int		$mode
+	 * @param	int		$id
+	 * @param	int		$reason_id
+	 * @param	string	$report_text
+	 * @param	mixed	$user_notify
+	 * @param 	array	$error
+	 * @param	string	$s_hidden_fields
+	 * @param	mixed	$captcha
+	 * @return	null
+	 */
+	protected function assign_template_data($mode, $id, $reason_id, $report_text, $user_notify, $error = array(), $s_hidden_fields = '', $captcha = false)
+	{
+		if ($captcha !== false && $captcha->is_solved() === false)
+		{
+			$this->template->assign_vars(array(
+				'S_CONFIRM_CODE'	=> true,
+				'CAPTCHA_TEMPLATE'	=> $captcha->get_template(),
+			));
+		}
+
+		$this->report_reason_provider->display_reasons($reason_id);
+
+		switch ($mode)
+		{
+			case 'pm':
+				$report_route = $this->helper->route('phpbb_report_pm_controller', array('id' => $id));
+			break;
+			case 'post':
+				$report_route = $this->helper->route('phpbb_report_post_controller', array('id' => $id));
+			break;
+		}
+
+		$this->template->assign_vars(array(
+			'ERROR'				=> (count($error) > 0) ? implode('<br />', $error) : '',
+			'S_REPORT_POST'		=> ($mode === 'pm') ? false : true,
+			'REPORT_TEXT'		=> $report_text,
+			'S_HIDDEN_FIELDS'	=> (!empty($s_hidden_fields)) ? $s_hidden_fields : null,
+			'S_REPORT_ACTION'	=> $report_route,
+
+			'S_NOTIFY'			=> $user_notify,
+			'S_CAN_NOTIFY'		=> ($this->user->data['is_registered']) ? true : false,
+			'S_IN_REPORT'		=> true,
+		));
+	}
+
+	/**
+	 * Check CAPTCHA
+	 *
+	 * @param	object	$captcha	A phpBB CAPTCHA object
+	 * @return	array	template variables which ensures that CAPTCHA's work correctly
+	 */
+	protected function check_captcha($captcha)
+	{
+		$error = array();
+		$captcha_hidden_fields = '';
+
+		$visual_confirmation_response = $captcha->validate();
+		if ($visual_confirmation_response)
+		{
+			$error[] = $visual_confirmation_response;
+		}
+
+		if (count($error) === 0)
+		{
+			$captcha->reset();
+		}
+		else if ($captcha->is_solved() !== false)
+		{
+			$captcha_hidden_fields = build_hidden_fields($captcha->get_hidden_fields());
+		}
+
+		return array(
+			'error' => $error,
+			'hidden_fields' => $captcha_hidden_fields,
+		);
+	}
+}
diff --git a/phpBB/phpbb/report/exception/already_reported_exception.php b/phpBB/phpbb/report/exception/already_reported_exception.php
new file mode 100644
index 0000000000..54174044fe
--- /dev/null
+++ b/phpBB/phpbb/report/exception/already_reported_exception.php
@@ -0,0 +1,19 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\report\exception;
+
+class already_reported_exception extends invalid_report_exception
+{
+
+}
diff --git a/phpBB/phpbb/report/exception/empty_report_exception.php b/phpBB/phpbb/report/exception/empty_report_exception.php
new file mode 100644
index 0000000000..8c968dca80
--- /dev/null
+++ b/phpBB/phpbb/report/exception/empty_report_exception.php
@@ -0,0 +1,22 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\report\exception;
+
+class empty_report_exception extends invalid_report_exception
+{
+	public function __construct()
+	{
+		parent::__construct('EMPTY_REPORT');
+	}
+}
diff --git a/phpBB/phpbb/report/exception/entity_not_found_exception.php b/phpBB/phpbb/report/exception/entity_not_found_exception.php
new file mode 100644
index 0000000000..732aa58a13
--- /dev/null
+++ b/phpBB/phpbb/report/exception/entity_not_found_exception.php
@@ -0,0 +1,19 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\report\exception;
+
+class entity_not_found_exception extends invalid_report_exception
+{
+
+}
diff --git a/phpBB/phpbb/report/exception/factory_invalid_argument_exception.php b/phpBB/phpbb/report/exception/factory_invalid_argument_exception.php
new file mode 100644
index 0000000000..19de91eea3
--- /dev/null
+++ b/phpBB/phpbb/report/exception/factory_invalid_argument_exception.php
@@ -0,0 +1,21 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\report\exception;
+
+use \phpbb\exception\runtime_exception;
+
+class factory_invalid_argument_exception extends runtime_exception
+{
+
+}
diff --git a/phpBB/phpbb/report/exception/invalid_report_exception.php b/phpBB/phpbb/report/exception/invalid_report_exception.php
new file mode 100644
index 0000000000..03ff0a872d
--- /dev/null
+++ b/phpBB/phpbb/report/exception/invalid_report_exception.php
@@ -0,0 +1,21 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\report\exception;
+
+use \phpbb\exception\runtime_exception;
+
+class invalid_report_exception extends runtime_exception
+{
+
+}
diff --git a/phpBB/phpbb/report/exception/pm_reporting_disabled_exception.php b/phpBB/phpbb/report/exception/pm_reporting_disabled_exception.php
new file mode 100644
index 0000000000..2c8ab8cf84
--- /dev/null
+++ b/phpBB/phpbb/report/exception/pm_reporting_disabled_exception.php
@@ -0,0 +1,22 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\report\exception;
+
+class pm_reporting_disabled_exception extends invalid_report_exception
+{
+	public function __construct()
+	{
+
+	}
+}
diff --git a/phpBB/phpbb/report/exception/report_permission_denied_exception.php b/phpBB/phpbb/report/exception/report_permission_denied_exception.php
new file mode 100644
index 0000000000..c7069288b8
--- /dev/null
+++ b/phpBB/phpbb/report/exception/report_permission_denied_exception.php
@@ -0,0 +1,19 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\report\exception;
+
+class report_permission_denied_exception extends invalid_report_exception
+{
+
+}
diff --git a/phpBB/phpbb/report/handler_factory.php b/phpBB/phpbb/report/handler_factory.php
new file mode 100644
index 0000000000..ec229aac54
--- /dev/null
+++ b/phpBB/phpbb/report/handler_factory.php
@@ -0,0 +1,56 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\report;
+
+use phpbb\report\exception\factory_invalid_argument_exception;
+
+class handler_factory
+{
+	/**
+	 * @var \Symfony\Component\DependencyInjection\ContainerInterface
+	 */
+	protected $container;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \Symfony\Component\DependencyInjection\ContainerInterface $container
+	 */
+	public function __construct(\Symfony\Component\DependencyInjection\ContainerInterface $container)
+	{
+		$this->container = $container;
+	}
+
+	/**
+	 * Return a new instance of an appropriate report handler
+	 *
+	 * @param string	$type
+	 * @return \phpbb\report\report_handler_interface
+	 * @throws \phpbb\report\exception\factory_invalid_argument_exception if $type is not valid
+	 */
+	public function get_instance($type)
+	{
+		switch ($type)
+		{
+			case 'pm':
+				return $this->container->get('phpbb.report.handlers.report_handler_pm');
+			break;
+			case 'post':
+				return $this->container->get('phpbb.report.handlers.report_handler_post');
+			break;
+		}
+
+		throw new factory_invalid_argument_exception();
+	}
+}
diff --git a/phpBB/phpbb/report/report_handler.php b/phpBB/phpbb/report/report_handler.php
new file mode 100644
index 0000000000..854318c559
--- /dev/null
+++ b/phpBB/phpbb/report/report_handler.php
@@ -0,0 +1,104 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\report;
+
+abstract class report_handler implements report_handler_interface
+{
+	/**
+	 * @var \phpbb\db\driver\driver_interface
+	 */
+	protected $db;
+
+	/**
+	 * @var \phpbb\event\dispatcher_interface
+	 */
+	protected $dispatcher;
+
+	/**
+	 * @var \phpbb\config\config
+	 */
+	protected $config;
+
+	/**
+	 * @var \phpbb\auth\auth
+	 */
+	protected $auth;
+
+	/**
+	 * @var \phpbb\user
+	 */
+	protected $user;
+
+	/**
+	 * @var \phpbb\notification\manager
+	 */
+	protected $notifications;
+
+	/**
+	 * @var array
+	 */
+	protected $report_data;
+
+	/**
+	 * Construtor
+	 *
+	 * @param \phpbb\db\driver\driver_interface	$db
+	 * @param \phpbb\event\dispatcher_interface	$dispatcher
+	 * @param \phpbb\config\db					$config
+	 * @param \phpbb\auth\auth					$auth
+	 * @param \phpbb\user						$user
+	 * @param \phpbb\notification\manager		$notification
+	 */
+	public function __construct(\phpbb\db\driver\driver_interface $db, \phpbb\event\dispatcher_interface $dispatcher, \phpbb\config\config $config, \phpbb\auth\auth $auth, \phpbb\user $user, \phpbb\notification\manager $notification)
+	{
+		$this->db				= $db;
+		$this->dispatcher		= $dispatcher;
+		$this->config			= $config;
+		$this->auth				= $auth;
+		$this->user				= $user;
+		$this->notifications	= $notification;
+		$this->report_data		= array();
+	}
+
+	/**
+	 * Creates a report entity in the database
+	 *
+	 * @param	array	$report_data
+	 * @return	int	the ID of the created entity
+	 */
+	protected function create_report(array $report_data)
+	{
+		$sql_ary = array(
+			'reason_id'							=> (int) $report_data['reason_id'],
+			'post_id'							=> $report_data['post_id'],
+			'pm_id'								=> $report_data['pm_id'],
+			'user_id'							=> (int) $this->user->data['user_id'],
+			'user_notify'						=> (int) $report_data['user_notify'],
+			'report_closed'						=> 0,
+			'report_time'						=> (int) time(),
+			'report_text'						=> (string) $report_data['report_text'],
+			'reported_post_text'				=> $report_data['reported_post_text'],
+			'reported_post_uid'					=> $report_data['reported_post_uid'],
+			'reported_post_bitfield'			=> $report_data['reported_post_bitfield'],
+			'reported_post_enable_bbcode'		=> $report_data['reported_post_enable_bbcode'],
+			'reported_post_enable_smilies'		=> $report_data['reported_post_enable_smilies'],
+			'reported_post_enable_magic_url'	=> $report_data['reported_post_enable_magic_url'],
+		);
+
+		$sql = 'INSERT INTO ' . REPORTS_TABLE . ' ' . $this->db->sql_build_array('INSERT', $sql_ary);
+		$this->db->sql_query($sql);
+
+		return $this->db->sql_nextid();
+	}
+}
diff --git a/phpBB/phpbb/report/report_handler_interface.php b/phpBB/phpbb/report/report_handler_interface.php
new file mode 100644
index 0000000000..8dafc392d0
--- /dev/null
+++ b/phpBB/phpbb/report/report_handler_interface.php
@@ -0,0 +1,43 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\report;
+
+interface report_handler_interface
+{
+	/**
+	 * Reports a message
+	 *
+	 * @param int		$id
+	 * @param int		$reason_id
+	 * @param string	$report_text
+	 * @param int		$user_notify
+	 * @return null
+	 * @throws \phpbb\report\exception\empty_report_exception		when the given report is empty
+	 * @throws \phpbb\report\exception\already_reported_exception	when the entity is already reported
+	 * @throws \phpbb\report\exception\entity_not_found_exception	when the entity does not exist or the user does not have viewing permissions for it
+	 * @throws \phpbb\report\exception\invalid_report_exception		when the entity cannot be reported for some other reason
+	 */
+	public function add_report($id, $reason_id, $report_text, $user_notify);
+
+	/**
+	 * Checks if the message is reportable
+	 *
+	 * @param int	$id
+	 * @return null
+	 * @throws \phpbb\report\exception\already_reported_exception	when the entity is already reported
+	 * @throws \phpbb\report\exception\entity_not_found_exception	when the entity does not exist or the user does not have viewing permissions for it
+	 * @throws \phpbb\report\exception\invalid_report_exception		when the entity cannot be reported for some other reason
+	 */
+	public function validate_report_request($id);
+}
diff --git a/phpBB/phpbb/report/report_handler_pm.php b/phpBB/phpbb/report/report_handler_pm.php
new file mode 100644
index 0000000000..774ca329ad
--- /dev/null
+++ b/phpBB/phpbb/report/report_handler_pm.php
@@ -0,0 +1,137 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\report;
+
+use phpbb\report\exception\empty_report_exception;
+use phpbb\report\exception\already_reported_exception;
+use phpbb\report\exception\pm_reporting_disabled_exception;
+use phpbb\report\exception\entity_not_found_exception;
+
+class report_handler_pm extends report_handler
+{
+	/**
+	 * {@inheritdoc}
+	 * @throws \phpbb\report\exception\pm_reporting_disabled_exception when PM reporting is disabled on the board
+	 */
+	public function add_report($id, $reason_id, $report_text, $user_notify)
+	{
+		// Cast the input variables
+		$id				= (int) $id;
+		$reason_id		= (int) $reason_id;
+		$report_text	= (string) $report_text;
+		$user_notify	= (int) $user_notify;
+
+		$this->validate_report_request($id);
+
+		$sql = 'SELECT *
+			FROM ' . REPORTS_REASONS_TABLE . "
+			WHERE reason_id = $reason_id";
+		$result = $this->db->sql_query($sql);
+		$row = $this->db->sql_fetchrow($result);
+		$this->db->sql_freeresult($result);
+
+		if (!$row || (empty($report_text) && strtolower($row['reason_title']) === 'other'))
+		{
+			throw new empty_report_exception();
+		}
+
+		$report_data = array(
+			'reason_id'							=> $reason_id,
+			'post_id'							=> 0,
+			'pm_id'								=> $id,
+			'user_notify'						=> $user_notify,
+			'report_text'						=> $report_text,
+			'reported_post_text'				=> $this->report_data['message_text'],
+			'reported_post_uid'					=> $this->report_data['bbcode_uid'],
+			'reported_post_bitfield'			=> $this->report_data['bbcode_bitfield'],
+			'reported_post_enable_bbcode'		=> $this->report_data['enable_bbcode'],
+			'reported_post_enable_smilies'		=> $this->report_data['enable_smilies'],
+			'reported_post_enable_magic_url'	=> $this->report_data['enable_magic_url'],
+		);
+
+		$report_id = $this->create_report($report_data);
+
+		$sql = 'UPDATE ' . PRIVMSGS_TABLE . '
+			SET message_reported = 1
+			WHERE msg_id = ' . $id;
+		$this->db->sql_query($sql);
+
+		$sql_ary = array(
+			'msg_id'		=> $id,
+			'user_id'		=> ANONYMOUS,
+			'author_id'		=> (int) $this->report_data['author_id'],
+			'pm_deleted'	=> 0,
+			'pm_new'		=> 0,
+			'pm_unread'		=> 0,
+			'pm_replied'	=> 0,
+			'pm_marked'		=> 0,
+			'pm_forwarded'	=> 0,
+			'folder_id'		=> PRIVMSGS_INBOX,
+		);
+
+		$sql = 'INSERT INTO ' . PRIVMSGS_TO_TABLE . ' ' . $this->db->sql_build_array('INSERT', $sql_ary);
+		$this->db->sql_query($sql);
+
+		$this->notifications->add_notifications('notification.type.report_pm', array_merge($this->report_data, $row, array(
+			'report_text'	=> $report_text,
+			'from_user_id'	=> $this->report_data['author_id'],
+			'report_id'		=> $report_id,
+		)));
+	}
+
+	/**
+	 * {@inheritdoc}
+	 * @throws \phpbb\report\exception\pm_reporting_disabled_exception when PM reporting is disabled on the board
+	 */
+	public function validate_report_request($id)
+	{
+		$id = (int) $id;
+
+		// Check if reporting PMs is enabled
+		if (!$this->config['allow_pm_report'])
+		{
+			throw new pm_reporting_disabled_exception();
+		}
+		else if ($id <= 0)
+		{
+			throw new entity_not_found_exception('NO_POST_SELECTED');
+		}
+
+		// Grab all relevant data
+		$sql = 'SELECT p.*, pt.*
+			FROM ' . PRIVMSGS_TABLE . ' p, ' . PRIVMSGS_TO_TABLE . " pt
+			WHERE p.msg_id = $id
+				AND p.msg_id = pt.msg_id
+				AND (p.author_id = " . $this->user->data['user_id'] . "
+					OR pt.user_id = " . $this->user->data['user_id'] . ")";
+		$result = $this->db->sql_query($sql);
+		$report_data = $this->db->sql_fetchrow($result);
+		$this->db->sql_freeresult($result);
+
+		// Check if message exists
+		if (!$report_data)
+		{
+			$this->user->add_lang('ucp');
+			throw new entity_not_found_exception('NO_MESSAGE');
+		}
+
+		// Check if message is already reported
+		if ($report_data['message_reported'])
+		{
+			throw new already_reported_exception();
+		}
+
+		$this->report_data = $report_data;
+	}
+}
diff --git a/phpBB/phpbb/report/report_handler_post.php b/phpBB/phpbb/report/report_handler_post.php
new file mode 100644
index 0000000000..52f09683ce
--- /dev/null
+++ b/phpBB/phpbb/report/report_handler_post.php
@@ -0,0 +1,175 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\report;
+
+use phpbb\report\exception\invalid_report_exception;
+use phpbb\report\exception\empty_report_exception;
+use phpbb\report\exception\already_reported_exception;
+use phpbb\report\exception\entity_not_found_exception;
+use phpbb\report\exception\report_permission_denied_exception;
+
+class report_handler_post extends report_handler
+{
+	/**
+	 * @var array
+	 */
+	protected $forum_data;
+
+	/**
+	 * {@inheritdoc}
+	 * @throws \phpbb\report\exception\report_permission_denied_exception when the user does not have permission to report the post
+	 */
+	public function add_report($id, $reason_id, $report_text, $user_notify)
+	{
+		// Cast the input variables
+		$id				= (int) $id;
+		$reason_id		= (int) $reason_id;
+		$report_text	= (string) $report_text;
+		$user_notify	= (int) $user_notify;
+
+		$this->validate_report_request($id);
+
+		$sql = 'SELECT *
+			FROM ' . REPORTS_REASONS_TABLE . "
+			WHERE reason_id = $reason_id";
+		$result = $this->db->sql_query($sql);
+		$row = $this->db->sql_fetchrow($result);
+		$this->db->sql_freeresult($result);
+
+		if (!$row || (empty($report_text) && strtolower($row['reason_title']) === 'other'))
+		{
+			throw new empty_report_exception();
+		}
+
+		$report_data = array(
+			'reason_id'							=> $reason_id,
+			'post_id'							=> $id,
+			'pm_id'								=> 0,
+			'user_notify'						=> $user_notify,
+			'report_text'						=> $report_text,
+			'reported_post_text'				=> $this->report_data['post_text'],
+			'reported_post_uid'					=> $this->report_data['bbcode_uid'],
+			'reported_post_bitfield'			=> $this->report_data['bbcode_bitfield'],
+			'reported_post_enable_bbcode'		=> $this->report_data['enable_bbcode'],
+			'reported_post_enable_smilies'		=> $this->report_data['enable_smilies'],
+			'reported_post_enable_magic_url'	=> $this->report_data['enable_magic_url'],
+		);
+
+		$this->create_report($report_data);
+
+		$sql = 'UPDATE ' . POSTS_TABLE . '
+			SET post_reported = 1
+			WHERE post_id = ' . $id;
+		$this->db->sql_query($sql);
+
+		if (!$this->report_data['topic_reported'])
+		{
+			$sql = 'UPDATE ' . TOPICS_TABLE . '
+				SET topic_reported = 1
+				WHERE topic_id = ' . $this->report_data['topic_id'] . '
+					OR topic_moved_id = ' . $this->report_data['topic_id'];
+			$this->db->sql_query($sql);
+		}
+
+		$this->notifications->add_notifications('notification.type.report_post', array_merge($this->report_data, $row, $this->forum_data, array(
+			'report_text'	=> $report_text,
+		)));
+	}
+
+	/**
+	 * {@inheritdoc}
+	 * @throws \phpbb\report\exception\report_permission_denied_exception when the user does not have permission to report the post
+	 */
+	public function validate_report_request($id)
+	{
+		$id = (int) $id;
+
+		// Check if id is valid
+		if ($id <= 0)
+		{
+			throw new entity_not_found_exception('NO_POST_SELECTED');
+		}
+
+		// Grab all relevant data
+		$sql = 'SELECT t.*, p.*
+			FROM ' . POSTS_TABLE . ' p, ' . TOPICS_TABLE . " t
+			WHERE p.post_id = $id
+				AND p.topic_id = t.topic_id";
+		$result = $this->db->sql_query($sql);
+		$report_data = $this->db->sql_fetchrow($result);
+		$this->db->sql_freeresult($result);
+
+		if (!$report_data)
+		{
+			throw new entity_not_found_exception('POST_NOT_EXIST');
+		}
+
+		$forum_id = (int) $report_data['forum_id'];
+
+		$sql = 'SELECT *
+			FROM ' . FORUMS_TABLE . '
+			WHERE forum_id = ' . $forum_id;
+		$result = $this->db->sql_query($sql);
+		$forum_data = $this->db->sql_fetchrow($result);
+		$this->db->sql_freeresult($result);
+
+		if (!$forum_data)
+		{
+			throw new invalid_report_exception('FORUM_NOT_EXIST');
+		}
+
+		$acl_check_ary = array(
+			'f_list' => 'POST_NOT_EXIST',
+			'f_read' => 'USER_CANNOT_READ',
+			'f_report' => 'USER_CANNOT_REPORT'
+		);
+
+		/**
+		 * This event allows you to do extra auth checks and verify if the user
+		 * has the required permissions
+		 *
+		 * @event core.report_post_auth
+		 * @var	array	forum_data		All data available from the forums table on this post's forum
+		 * @var	array	report_data		All data available from the topics and the posts tables on this post (and its topic)
+		 * @var	array	acl_check_ary	An array with the ACL to be tested. The evaluation is made in the same order as the array is sorted
+		 *								The key is the ACL name and the value is the language key for the error message.
+		 * @since 3.1.3-RC1
+		 */
+		$vars = array(
+			'forum_data',
+			'report_data',
+			'acl_check_ary',
+		);
+		extract($this->dispatcher->trigger_event('core.report_post_auth', compact($vars)));
+
+		$this->auth->acl($this->user->data);
+
+		foreach ($acl_check_ary as $acl => $error)
+		{
+			if (!$this->auth->acl_get($acl, $forum_id))
+			{
+				throw new report_permission_denied_exception($error);
+			}
+		}
+		unset($acl_check_ary);
+
+		if ($report_data['post_reported'])
+		{
+			throw new already_reported_exception();
+		}
+
+		$this->report_data	= $report_data;
+		$this->forum_data	= $forum_data;
+	}
+}
diff --git a/phpBB/phpbb/report/report_reason_list_provider.php b/phpBB/phpbb/report/report_reason_list_provider.php
new file mode 100644
index 0000000000..388a61d577
--- /dev/null
+++ b/phpBB/phpbb/report/report_reason_list_provider.php
@@ -0,0 +1,78 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\report;
+
+class report_reason_list_provider
+{
+	/**
+	 * @var \phpbb\db\driver\driver_interface
+	 */
+	protected $db;
+
+	/**
+	 * @var \phpbb\template\template
+	 */
+	protected $template;
+
+	/**
+	 * @var \phpbb\user
+	 */
+	protected $user;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\db\driver\driver_interface	$db
+	 * @param \phpbb\template\template			$template
+	 * @param \phpbb\user						$user
+	 */
+	public function __construct(\phpbb\db\driver\driver_interface $db, \phpbb\template\template $template, \phpbb\user $user)
+	{
+		$this->db		= $db;
+		$this->template	= $template;
+		$this->user		= $user;
+	}
+
+	/**
+	 * Sets template variables to render report reasons select HTML input
+	 *
+	 * @param int	$reason_id
+	 * @return null
+	 */
+	public function display_reasons($reason_id = 0)
+	{
+		$sql = 'SELECT *
+			FROM ' . REPORTS_REASONS_TABLE . '
+			ORDER BY reason_order ASC';
+		$result = $this->db->sql_query($sql);
+
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			// If the reason is defined within the language file, we will use the localized version, else just use the database entry...
+			if (isset($this->user->lang['report_reasons']['TITLE'][strtoupper($row['reason_title'])]) && isset($this->user->lang['report_reasons']['DESCRIPTION'][strtoupper($row['reason_title'])]))
+			{
+				$row['reason_description'] = $this->user->lang['report_reasons']['DESCRIPTION'][strtoupper($row['reason_title'])];
+				$row['reason_title'] = $this->user->lang['report_reasons']['TITLE'][strtoupper($row['reason_title'])];
+			}
+
+			$this->template->assign_block_vars('reason', array(
+				'ID'			=> $row['reason_id'],
+				'TITLE'			=> $row['reason_title'],
+				'DESCRIPTION'	=> $row['reason_description'],
+				'S_SELECTED'	=> ($row['reason_id'] == $reason_id) ? true : false,
+			));
+		}
+		$this->db->sql_freeresult($result);
+	}
+}
diff --git a/phpBB/phpbb/request/deactivated_super_global.php b/phpBB/phpbb/request/deactivated_super_global.php
index b6cad59be4..ab56240b14 100644
--- a/phpBB/phpbb/request/deactivated_super_global.php
+++ b/phpBB/phpbb/request/deactivated_super_global.php
@@ -56,7 +56,7 @@ class deactivated_super_global implements \ArrayAccess, \Countable, \IteratorAgg
 		$file = '';
 		$line = 0;
 
-		$message = 'Illegal use of $' . $this->name . '. You must use the request class or request_var() to access input data. Found in %s on line %d. This error message was generated by deactivated_super_global.';
+		$message = 'Illegal use of $' . $this->name . '. You must use the request class to access input data. Found in %s on line %d. This error message was generated by deactivated_super_global.';
 
 		$backtrace = debug_backtrace();
 		if (isset($backtrace[1]))
diff --git a/phpBB/phpbb/request/request.php b/phpBB/phpbb/request/request.php
index 00ff9064cb..a0267d1370 100644
--- a/phpBB/phpbb/request/request.php
+++ b/phpBB/phpbb/request/request.php
@@ -150,8 +150,6 @@ class request implements \phpbb\request\request_interface
 			return;
 		}
 
-		$this->type_cast_helper->add_magic_quotes($value);
-
 		// setting to null means unsetting
 		if ($value === null)
 		{
@@ -219,6 +217,51 @@ class request implements \phpbb\request\request_interface
 	}
 
 	/**
+	 * {@inheritdoc}
+	 */
+	public function raw_variable($var_name, $default, $super_global = \phpbb\request\request_interface::REQUEST)
+	{
+		$path = false;
+
+		// deep direct access to multi dimensional arrays
+		if (is_array($var_name))
+		{
+			$path = $var_name;
+			// make sure at least the variable name is specified
+			if (empty($path))
+			{
+				return (is_array($default)) ? array() : $default;
+			}
+			// the variable name is the first element on the path
+			$var_name = array_shift($path);
+		}
+
+		if (!isset($this->input[$super_global][$var_name]))
+		{
+			return (is_array($default)) ? array() : $default;
+		}
+		$var = $this->input[$super_global][$var_name];
+
+		if ($path)
+		{
+			// walk through the array structure and find the element we are looking for
+			foreach ($path as $key)
+			{
+				if (is_array($var) && isset($var[$key]))
+				{
+					$var = $var[$key];
+				}
+				else
+				{
+					return (is_array($default)) ? array() : $default;
+				}
+			}
+		}
+
+		return $var;
+	}
+
+	/**
 	* Shortcut method to retrieve SERVER variables.
 	*
 	* Also fall back to getenv(), some CGI setups may need it (probably not, but
@@ -363,41 +406,14 @@ class request implements \phpbb\request\request_interface
 	*/
 	protected function _variable($var_name, $default, $multibyte = false, $super_global = \phpbb\request\request_interface::REQUEST, $trim = true)
 	{
-		$path = false;
-
-		// deep direct access to multi dimensional arrays
-		if (is_array($var_name))
-		{
-			$path = $var_name;
-			// make sure at least the variable name is specified
-			if (empty($path))
-			{
-				return (is_array($default)) ? array() : $default;
-			}
-			// the variable name is the first element on the path
-			$var_name = array_shift($path);
-		}
+		$var = $this->raw_variable($var_name, $default, $super_global);
 
-		if (!isset($this->input[$super_global][$var_name]))
+		// Return prematurely if raw variable is empty array or the same as
+		// the default. Using strict comparison to ensure that one can't
+		// prevent proper type checking on any input variable
+		if ($var === array() || $var === $default)
 		{
-			return (is_array($default)) ? array() : $default;
-		}
-		$var = $this->input[$super_global][$var_name];
-
-		if ($path)
-		{
-			// walk through the array structure and find the element we are looking for
-			foreach ($path as $key)
-			{
-				if (is_array($var) && isset($var[$key]))
-				{
-					$var = $var[$key];
-				}
-				else
-				{
-					return (is_array($default)) ? array() : $default;
-				}
-			}
+			return $var;
 		}
 
 		$this->type_cast_helper->recursive_set_var($var, $default, $multibyte, $trim);
diff --git a/phpBB/phpbb/request/request_interface.php b/phpBB/phpbb/request/request_interface.php
index 47b3b3a4ed..3bfa8bb424 100644
--- a/phpBB/phpbb/request/request_interface.php
+++ b/phpBB/phpbb/request/request_interface.php
@@ -65,6 +65,28 @@ interface request_interface
 	public function variable($var_name, $default, $multibyte = false, $super_global = \phpbb\request\request_interface::REQUEST);
 
 	/**
+	 * Get a variable without trimming strings and without escaping.
+	 * This method MUST NOT be used with queries.
+	 * Same functionality as variable(), except does not run trim() on strings
+	 * and does not escape input.
+	 * This method should only be used when the raw input is needed without
+	 * any escaping, i.e. for database password during the installation.
+	 *
+	 * @param	string|array	$var_name	The form variable's name from which data shall be retrieved.
+	 * 										If the value is an array this may be an array of indizes which will give
+	 * 										direct access to a value at any depth. E.g. if the value of "var" is array(1 => "a")
+	 * 										then specifying array("var", 1) as the name will return "a".
+	 * @param	mixed			$default	A default value that is returned if the variable was not set.
+	 * 										This function will always return a value of the same type as the default.
+	 * @param	\phpbb\request\request_interface::POST|GET|REQUEST|COOKIE	$super_global
+	 * 										Specifies which super global should be used
+	 *
+	 * @return	mixed	The value of $_REQUEST[$var_name] run through {@link set_var set_var} to ensure that the type is the
+	 *					the same as that of $default. If the variable is not set $default is returned.
+	 */
+	public function raw_variable($var_name, $default, $super_global = \phpbb\request\request_interface::REQUEST);
+
+	/**
 	* Shortcut method to retrieve SERVER variables.
 	*
 	* @param	string|array	$var_name		See \phpbb\request\request_interface::variable
diff --git a/phpBB/phpbb/request/type_cast_helper.php b/phpBB/phpbb/request/type_cast_helper.php
index bc654e6182..912494998d 100644
--- a/phpBB/phpbb/request/type_cast_helper.php
+++ b/phpBB/phpbb/request/type_cast_helper.php
@@ -18,69 +18,6 @@ namespace phpbb\request;
 */
 class type_cast_helper implements \phpbb\request\type_cast_helper_interface
 {
-
-	/**
-	* @var	string	Whether slashes need to be stripped from input
-	*/
-	protected $strip;
-
-	/**
-	* Initialises the type cast helper class.
-	* All it does is find out whether magic quotes are turned on.
-	*/
-	public function __construct()
-	{
-		if (version_compare(PHP_VERSION, '5.4.0-dev', '>='))
-		{
-			$this->strip = false;
-		}
-		else
-		{
-			$this->strip = (@get_magic_quotes_gpc()) ? true : false;
-		}
-	}
-
-	/**
-	* Recursively applies addslashes to a variable.
-	*
-	* @param	mixed	&$var	Variable passed by reference to which slashes will be added.
-	*/
-	public function addslashes_recursively(&$var)
-	{
-		if (is_string($var))
-		{
-			$var = addslashes($var);
-		}
-		else if (is_array($var))
-		{
-			$var_copy = $var;
-			$var = array();
-			foreach ($var_copy as $key => $value)
-			{
-				if (is_string($key))
-				{
-					$key = addslashes($key);
-				}
-				$var[$key] = $value;
-
-				$this->addslashes_recursively($var[$key]);
-			}
-		}
-	}
-
-	/**
-	* Recursively applies addslashes to a variable if magic quotes are turned on.
-	*
-	* @param	mixed	&$var	Variable passed by reference to which slashes will be added.
-	*/
-	public function add_magic_quotes(&$var)
-	{
-		if ($this->strip)
-		{
-			$this->addslashes_recursively($var);
-		}
-	}
-
 	/**
 	* Set variable $result to a particular type.
 	*
@@ -129,8 +66,6 @@ class type_cast_helper implements \phpbb\request\type_cast_helper_interface
 					$result = preg_replace('/[\x80-\xFF]/', '?', $result);
 				}
 			}
-
-			$result = ($this->strip) ? stripslashes($result) : $result;
 		}
 	}
 
@@ -172,7 +107,6 @@ class type_cast_helper implements \phpbb\request\type_cast_helper_interface
 			}
 
 			list($default_key, $default_value) = each($default);
-			$value_type = gettype($default_value);
 			$key_type = gettype($default_key);
 
 			$_var = $var;
diff --git a/phpBB/phpbb/request/type_cast_helper_interface.php b/phpBB/phpbb/request/type_cast_helper_interface.php
index 2cb28d021f..9671573bf1 100644
--- a/phpBB/phpbb/request/type_cast_helper_interface.php
+++ b/phpBB/phpbb/request/type_cast_helper_interface.php
@@ -19,20 +19,6 @@ namespace phpbb\request;
 interface type_cast_helper_interface
 {
 	/**
-	* Recursively applies addslashes to a variable.
-	*
-	* @param	mixed	&$var	Variable passed by reference to which slashes will be added.
-	*/
-	public function addslashes_recursively(&$var);
-
-	/**
-	* Recursively applies addslashes to a variable if magic quotes are turned on.
-	*
-	* @param	mixed	&$var	Variable passed by reference to which slashes will be added.
-	*/
-	public function add_magic_quotes(&$var);
-
-	/**
 	* Set variable $result to a particular type.
 	*
 	* @param mixed	&$result	The variable to fill
diff --git a/phpBB/phpbb/routing/file_locator.php b/phpBB/phpbb/routing/file_locator.php
new file mode 100644
index 0000000000..64efcc6c76
--- /dev/null
+++ b/phpBB/phpbb/routing/file_locator.php
@@ -0,0 +1,33 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license       GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\routing;
+
+use phpbb\filesystem\filesystem_interface;
+use Symfony\Component\Config\FileLocator;
+
+class file_locator extends FileLocator
+{
+	public function __construct(filesystem_interface $filesystem, $paths = [])
+	{
+		$paths = (array) $paths;
+		$absolute_paths = [];
+
+		foreach ($paths as $path)
+		{
+			$absolute_paths[] = $filesystem->realpath($path);
+		}
+
+		parent::__construct($absolute_paths);
+	}
+}
diff --git a/phpBB/phpbb/routing/helper.php b/phpBB/phpbb/routing/helper.php
new file mode 100644
index 0000000000..c15608dce5
--- /dev/null
+++ b/phpBB/phpbb/routing/helper.php
@@ -0,0 +1,162 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\routing;
+
+use Symfony\Component\Routing\Generator\UrlGeneratorInterface;
+use Symfony\Component\Routing\RequestContext;
+
+/**
+* Controller helper class, contains methods that do things for controllers
+*/
+class helper
+{
+	/**
+	 * config object
+	 * @var \phpbb\config\config
+	 */
+	protected $config;
+
+	/**
+	 * phpBB router
+	 * @var \phpbb\routing\router
+	 */
+	protected $router;
+
+	/**
+	 * @var \phpbb\symfony_request
+	 */
+	protected $symfony_request;
+
+	/**
+	 * @var \phpbb\request\request_interface
+	 */
+	protected $request;
+
+	/**
+	 * @var \phpbb\filesystem The filesystem object
+	 */
+	protected $filesystem;
+
+	/**
+	 * phpBB root path
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * PHP file extension
+	 * @var string
+	 */
+	protected $php_ext;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\config\config $config Config object
+	 * @param \phpbb\routing\router $router phpBB router
+	 * @param \phpbb\symfony_request $symfony_request Symfony Request object
+	 * @param \phpbb\request\request_interface $request phpBB request object
+	 * @param \phpbb\filesystem\filesystem $filesystem The filesystem object
+	 * @param string $phpbb_root_path phpBB root path
+	 * @param string $php_ext PHP file extension
+	 */
+	public function __construct(\phpbb\config\config $config, \phpbb\routing\router $router, \phpbb\symfony_request $symfony_request, \phpbb\request\request_interface $request, \phpbb\filesystem\filesystem $filesystem, $phpbb_root_path, $php_ext)
+	{
+		$this->config = $config;
+		$this->router = $router;
+		$this->symfony_request = $symfony_request;
+		$this->request = $request;
+		$this->filesystem = $filesystem;
+		$this->phpbb_root_path = $phpbb_root_path;
+		$this->php_ext = $php_ext;
+	}
+
+	/**
+	 * Generate a URL to a route
+	 *
+	 * @param string	$route		Name of the route to travel
+	 * @param array	$params		String or array of additional url parameters
+	 * @param bool	$is_amp		Is url using &amp; (true) or & (false)
+	 * @param string|bool		$session_id	Possibility to use a custom session id instead of the global one
+	 * @param bool|string		$reference_type The type of reference to be generated (one of the constants)
+	 * @return string The URL already passed through append_sid()
+	 */
+	public function route($route, array $params = array(), $is_amp = true, $session_id = false, $reference_type = UrlGeneratorInterface::ABSOLUTE_PATH)
+	{
+		$anchor = '';
+		if (isset($params['#']))
+		{
+			$anchor = '#' . $params['#'];
+			unset($params['#']);
+		}
+
+		$context = new RequestContext();
+		$context->fromRequest($this->symfony_request);
+
+		if ($this->config['force_server_vars'])
+		{
+			$context->setHost($this->config['server_name']);
+			$context->setScheme(substr($this->config['server_protocol'], 0, -3));
+			$context->setHttpPort($this->config['server_port']);
+			$context->setHttpsPort($this->config['server_port']);
+			$context->setBaseUrl(rtrim($this->config['script_path'], '/'));
+		}
+
+		$script_name = $this->symfony_request->getScriptName();
+		$page_name = substr($script_name, -1, 1) == '/' ? '' : utf8_basename($script_name);
+
+		$base_url = $context->getBaseUrl();
+
+		// Append page name if base URL does not contain it
+		if (!empty($page_name) && strpos($base_url, '/' . $page_name) === false)
+		{
+			$base_url .= '/' . $page_name;
+		}
+
+		// If enable_mod_rewrite is false we need to replace the current front-end by app.php, otherwise we need to remove it.
+		$base_url = str_replace('/' . $page_name, empty($this->config['enable_mod_rewrite']) ? '/app.' . $this->php_ext : '', $base_url);
+
+		// We need to update the base url to move to the directory of the app.php file if the current script is not app.php
+		if ($page_name !== 'app.php' && !$this->config['force_server_vars'])
+		{
+			if (empty($this->config['enable_mod_rewrite']))
+			{
+				$base_url = str_replace('/app.' . $this->php_ext, '/' . $this->phpbb_root_path . 'app.' . $this->php_ext, $base_url);
+			}
+			else
+			{
+				$base_url .= preg_replace(get_preg_expression('path_remove_dot_trailing_slash'), '$2', $this->phpbb_root_path);
+			}
+		}
+
+		$base_url = $this->request->escape($this->filesystem->clean_path($base_url), true);
+
+		$context->setBaseUrl($base_url);
+
+		$this->router->setContext($context);
+		$route_url = $this->router->generate($route, $params, $reference_type);
+
+		if ($is_amp)
+		{
+			$route_url = str_replace(array('&amp;', '&'), array('&', '&amp;'), $route_url);
+		}
+
+		if ($reference_type === UrlGeneratorInterface::RELATIVE_PATH && empty($this->config['enable_mod_rewrite']))
+		{
+			$route_url = 'app.' . $this->php_ext . '/' . $route_url;
+		}
+
+		return append_sid($route_url . $anchor, false, $is_amp, $session_id, true);
+	}
+}
diff --git a/phpBB/phpbb/routing/loader_resolver.php b/phpBB/phpbb/routing/loader_resolver.php
new file mode 100644
index 0000000000..13fbc6405c
--- /dev/null
+++ b/phpBB/phpbb/routing/loader_resolver.php
@@ -0,0 +1,50 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license       GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\routing;
+
+use Symfony\Component\Config\Loader\LoaderResolverInterface;
+
+/**
+ * @see Symfony\Component\Config\Loader\LoaderResolver
+ */
+class loader_resolver implements LoaderResolverInterface
+{
+	/**
+	 * @var \Symfony\Component\Config\Loader\LoaderInterface[] An array of LoaderInterface objects
+	 */
+	protected $loaders = [];
+
+	public function __construct($loaders = [])
+	{
+		$this->loaders = $loaders;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function resolve($resource, $type = null)
+	{
+		/** @var \Symfony\Component\Config\Loader\LoaderInterface $loader */
+		foreach ($this->loaders as $loader)
+		{
+			if ($loader->supports($resource, $type))
+			{
+				$loader->setResolver($this);
+				return $loader;
+			}
+		}
+
+		return false;
+	}
+}
diff --git a/phpBB/phpbb/routing/resources_locator/chained_resources_locator.php b/phpBB/phpbb/routing/resources_locator/chained_resources_locator.php
new file mode 100644
index 0000000000..db9abf2095
--- /dev/null
+++ b/phpBB/phpbb/routing/resources_locator/chained_resources_locator.php
@@ -0,0 +1,47 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license       GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\routing\resources_locator;
+
+class chained_resources_locator implements resources_locator_interface
+{
+	/**
+	 * @var resources_locator_interface[]
+	 */
+	protected $locators;
+
+	/**
+	 * Construct method
+	 *
+	 * @param resources_locator_interface[]	$locators	Locators
+	 */
+	public function __construct($locators)
+	{
+		$this->locators		= $locators;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function locate_resources()
+	{
+		$resources = [];
+
+		foreach ($this->locators as $locator)
+		{
+			$resources = array_merge($resources, $locator->locate_resources());
+		}
+
+		return $resources;
+	}
+}
diff --git a/phpBB/phpbb/routing/resources_locator/default_resources_locator.php b/phpBB/phpbb/routing/resources_locator/default_resources_locator.php
new file mode 100644
index 0000000000..90c3877007
--- /dev/null
+++ b/phpBB/phpbb/routing/resources_locator/default_resources_locator.php
@@ -0,0 +1,105 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license       GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\routing\resources_locator;
+
+use phpbb\extension\manager;
+
+/**
+ * Locates the yaml routing resources located in the default locations
+ */
+class default_resources_locator implements resources_locator_interface
+{
+	/**
+	 * phpBB root path
+	 *
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * Name of the current environment
+	 *
+	 * @var string
+	 */
+	protected $environment;
+
+	/**
+	 * Extension manager
+	 *
+	 * @var manager
+	 */
+	protected $extension_manager;
+
+	/**
+	 * Construct method
+	 *
+	 * @param string	$phpbb_root_path	phpBB root path
+	 * @param string	$environment		Name of the current environment
+	 * @param manager	$extension_manager	Extension manager
+	 */
+	public function __construct($phpbb_root_path, $environment, manager $extension_manager = null)
+	{
+		$this->phpbb_root_path		= $phpbb_root_path;
+		$this->environment			= $environment;
+		$this->extension_manager	= $extension_manager;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function locate_resources()
+	{
+		$resources = [['config/' . $this->environment . '/routing/environment.yml', 'yaml']];
+
+		$resources = $this->append_ext_resources($resources);
+
+		return $resources;
+	}
+
+	/**
+	 * Append extension resources to an array of resouces
+	 *
+	 * @see resources_locator_interface::locate_resources()
+	 *
+	 * @param mixed[] $resources List of resources
+	 *
+	 * @return mixed[] List of resources
+	 */
+	protected function append_ext_resources(array $resources)
+	{
+		if ($this->extension_manager !== null)
+		{
+			foreach ($this->extension_manager->all_enabled(false) as $path)
+			{
+				if (file_exists($this->phpbb_root_path . $path . 'config/' . $this->environment . '/routing/environment.yml'))
+				{
+					$resources[] = [$path . 'config/' . $this->environment . '/routing/environment.yml', 'yaml'];
+				}
+				else if (!is_dir($this->phpbb_root_path . $path . 'config/' . $this->environment))
+				{
+					if (file_exists($this->phpbb_root_path . $path . 'config/default/routing/environment.yml'))
+					{
+						$resources[] = [$path . 'config/default/routing/environment.yml', 'yaml'];
+					}
+					else if (!is_dir($this->phpbb_root_path . $path . 'config/default/routing') && file_exists($this->phpbb_root_path . $path . 'config/routing.yml'))
+					{
+						$resources[] = [$path . 'config/routing.yml', 'yaml'];
+					}
+				}
+			}
+		}
+
+		return $resources;
+	}
+}
diff --git a/phpBB/phpbb/routing/resources_locator/installer_resources_locator.php b/phpBB/phpbb/routing/resources_locator/installer_resources_locator.php
new file mode 100644
index 0000000000..42cd0f11af
--- /dev/null
+++ b/phpBB/phpbb/routing/resources_locator/installer_resources_locator.php
@@ -0,0 +1,78 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license       GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\routing\resources_locator;
+
+use phpbb\filesystem\filesystem_interface;
+
+/**
+ * Locates the yaml routing resources taking update directories into consideration
+ */
+class installer_resources_locator implements resources_locator_interface
+{
+	/**
+	 * phpBB's filesystem handler
+	 *
+	 * @var filesystem_interface
+	 */
+	protected $filesystem;
+
+	/**
+	 * phpBB root path
+	 *
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * Name of the current environment
+	 *
+	 * @var string
+	 */
+	protected $environment;
+
+	/**
+	 * Construct method
+	 *
+	 * @param filesystem_interface	$filesystem			phpBB's filesystem handler
+	 * @param string				$phpbb_root_path	phpBB root path
+	 * @param string				$environment		Name of the current environment
+	 */
+	public function __construct(filesystem_interface $filesystem, $phpbb_root_path, $environment)
+	{
+		$this->filesystem			= $filesystem;
+		$this->phpbb_root_path		= $phpbb_root_path;
+		$this->environment			= $environment;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function locate_resources()
+	{
+		if ($this->filesystem->exists($this->phpbb_root_path . 'install/update/new/config'))
+		{
+			$resources = array(
+				array('install/update/new/config/' . $this->environment . '/routing/environment.yml', 'yaml')
+			);
+		}
+		else
+		{
+			$resources = array(
+				array('config/' . $this->environment . '/routing/environment.yml', 'yaml')
+			);
+		}
+
+		return $resources;
+	}
+}
diff --git a/phpBB/phpbb/routing/resources_locator/resources_locator_interface.php b/phpBB/phpbb/routing/resources_locator/resources_locator_interface.php
new file mode 100644
index 0000000000..46335cb288
--- /dev/null
+++ b/phpBB/phpbb/routing/resources_locator/resources_locator_interface.php
@@ -0,0 +1,27 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\routing\resources_locator;
+
+interface resources_locator_interface
+{
+	/**
+	 * Locates a list of resources used to load the routes
+	 *
+	 * Each entry of the list can be either the resource or an array composed of 2 elements:
+	 * the resource and its type.
+	 *
+	 * @return mixed[] List of resources
+	 */
+	public function locate_resources();
+}
diff --git a/phpBB/phpbb/routing/router.php b/phpBB/phpbb/routing/router.php
new file mode 100644
index 0000000000..f19886fb0b
--- /dev/null
+++ b/phpBB/phpbb/routing/router.php
@@ -0,0 +1,395 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license       GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\routing;
+
+use phpbb\routing\resources_locator\resources_locator_interface;
+use Symfony\Component\Config\ConfigCache;
+use Symfony\Component\Config\Loader\LoaderInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\DependencyInjection\Exception\ParameterNotFoundException;
+use Symfony\Component\DependencyInjection\Exception\RuntimeException;
+use Symfony\Component\Filesystem\Exception\IOException;
+use Symfony\Component\Routing\Generator\Dumper\PhpGeneratorDumper;
+use Symfony\Component\Routing\Generator\UrlGenerator;
+use Symfony\Component\Routing\Matcher\Dumper\PhpMatcherDumper;
+use Symfony\Component\Routing\Matcher\UrlMatcher;
+use Symfony\Component\Routing\RequestContext;
+use Symfony\Component\Routing\RouteCollection;
+use Symfony\Component\Routing\RouterInterface;
+
+/**
+ * Integration of all pieces of the routing system for easier use.
+ */
+class router implements RouterInterface
+{
+	/**
+	 * @var ContainerInterface
+	 */
+	protected $container;
+
+	/**
+	 * @var resources_locator_interface
+	 */
+	protected $resources_locator;
+
+	/**
+	 * @var LoaderInterface
+	 */
+	protected $loader;
+
+	/**
+	 * PHP file extensions
+	 *
+	 * @var string
+	 */
+	protected $php_ext;
+
+	/**
+	 * @var \Symfony\Component\Routing\Matcher\UrlMatcherInterface|null
+	 */
+	protected $matcher;
+
+	/**
+	 * @var \Symfony\Component\Routing\Generator\UrlGeneratorInterface|null
+	 */
+	protected $generator;
+
+	/**
+	 * @var RequestContext
+	 */
+	protected $context;
+
+	/**
+	 * @var RouteCollection
+	 */
+	protected $route_collection;
+
+	/**
+	 * @var string
+	 */
+	protected $cache_dir;
+
+	/**
+	 * Construct method
+	 *
+	 * @param ContainerInterface			$container			DI container
+	 * @param resources_locator_interface	$resources_locator	Resources locator
+	 * @param LoaderInterface				$loader				Resources loader
+	 * @param string						$php_ext			PHP file extension
+	 * @param string						$cache_dir			phpBB cache directory
+	 */
+	public function __construct(ContainerInterface $container, resources_locator_interface $resources_locator, LoaderInterface $loader, $php_ext, $cache_dir)
+	{
+		$this->container			= $container;
+		$this->resources_locator	= $resources_locator;
+		$this->loader				= $loader;
+		$this->php_ext				= $php_ext;
+		$this->context				= new RequestContext();
+		$this->cache_dir			= $cache_dir;
+	}
+
+	/**
+	 * Get the list of routes
+	 *
+	 * @return RouteCollection Get the route collection
+	 */
+	public function get_routes()
+	{
+		if ($this->route_collection === null /*|| $this->route_collection->count() === 0*/)
+		{
+			$this->route_collection = new RouteCollection;
+			foreach ($this->resources_locator->locate_resources() as $resource)
+			{
+				if (is_array($resource))
+				{
+					$this->route_collection->addCollection($this->loader->load($resource[0], $resource[1]));
+				}
+				else
+				{
+					$this->route_collection->addCollection($this->loader->load($resource));
+				}
+			}
+
+			$this->resolveParameters($this->route_collection);
+		}
+
+		return $this->route_collection;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function getRouteCollection()
+	{
+		return $this->get_routes();
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function setContext(RequestContext $context)
+	{
+		$this->context = $context;
+
+		if ($this->matcher !== null)
+		{
+			$this->get_matcher()->setContext($context);
+		}
+		if ($this->generator !== null)
+		{
+			$this->get_generator()->setContext($context);
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function getContext()
+	{
+		return $this->context;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function generate($name, $parameters = array(), $referenceType = self::ABSOLUTE_PATH)
+	{
+		return $this->get_generator()->generate($name, $parameters, $referenceType);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function match($pathinfo)
+	{
+		return $this->get_matcher()->match($pathinfo);
+	}
+
+	/**
+	 * Gets the UrlMatcher instance associated with this Router.
+	 *
+	 * @return \Symfony\Component\Routing\Matcher\UrlMatcherInterface A UrlMatcherInterface instance
+	 */
+	public function get_matcher()
+	{
+		if ($this->matcher !== null)
+		{
+			return $this->matcher;
+		}
+
+		$this->create_dumped_url_matcher();
+
+		return $this->matcher;
+	}
+
+	/**
+	 * Creates a new dumped URL Matcher (dump it if necessary)
+	 */
+	protected function create_dumped_url_matcher()
+	{
+		try
+		{
+			$cache = new ConfigCache("{$this->cache_dir}url_matcher.{$this->php_ext}", defined('DEBUG'));
+			if (!$cache->isFresh())
+			{
+				$dumper = new PhpMatcherDumper($this->get_routes());
+
+				$options = array(
+					'class'      => 'phpbb_url_matcher',
+					'base_class' => 'Symfony\\Component\\Routing\\Matcher\\UrlMatcher',
+				);
+
+				$cache->write($dumper->dump($options), $this->get_routes()->getResources());
+			}
+
+			require_once($cache->getPath());
+
+			$this->matcher = new \phpbb_url_matcher($this->context);
+		}
+		catch (IOException $e)
+		{
+			$this->create_new_url_matcher();
+		}
+	}
+
+	/**
+	 * Creates a new URL Matcher
+	 */
+	protected function create_new_url_matcher()
+	{
+		$this->matcher = new UrlMatcher($this->get_routes(), $this->context);
+	}
+
+	/**
+	 * Gets the UrlGenerator instance associated with this Router.
+	 *
+	 * @return \Symfony\Component\Routing\Generator\UrlGeneratorInterface A UrlGeneratorInterface instance
+	 */
+	public function get_generator()
+	{
+		if ($this->generator !== null)
+		{
+			return $this->generator;
+		}
+
+		$this->create_dumped_url_generator();
+
+		return $this->generator;
+	}
+
+	/**
+	 * Creates a new dumped URL Generator (dump it if necessary)
+	 */
+	protected function create_dumped_url_generator()
+	{
+		try
+		{
+			$cache = new ConfigCache("{$this->cache_dir}url_generator.{$this->php_ext}", defined('DEBUG'));
+			if (!$cache->isFresh())
+			{
+				$dumper = new PhpGeneratorDumper($this->get_routes());
+
+				$options = array(
+					'class'      => 'phpbb_url_generator',
+					'base_class' => 'Symfony\\Component\\Routing\\Generator\\UrlGenerator',
+				);
+
+				$cache->write($dumper->dump($options), $this->get_routes()->getResources());
+			}
+
+			require_once($cache->getPath());
+
+			$this->generator = new \phpbb_url_generator($this->context);
+		}
+		catch (IOException $e)
+		{
+			$this->create_new_url_generator();
+		}
+	}
+
+	/**
+	 * Creates a new URL Generator
+	 */
+	protected function create_new_url_generator()
+	{
+		$this->generator = new UrlGenerator($this->get_routes(), $this->context);
+	}
+
+	/**
+	 * Replaces placeholders with service container parameter values in:
+	 * - the route defaults,
+	 * - the route requirements,
+	 * - the route path,
+	 * - the route host,
+	 * - the route schemes,
+	 * - the route methods.
+	 *
+	 * @param RouteCollection $collection
+	 */
+	protected function resolveParameters(RouteCollection $collection)
+	{
+		/** @var \Symfony\Component\Routing\Route $route */
+		foreach ($collection as $route)
+		{
+			foreach ($route->getDefaults() as $name => $value)
+			{
+				$route->setDefault($name, $this->resolve($value));
+			}
+
+			$requirements = $route->getRequirements();
+			unset($requirements['_scheme']);
+			unset($requirements['_method']);
+
+			foreach ($requirements as $name => $value)
+			{
+				$route->setRequirement($name, $this->resolve($value));
+			}
+
+			$route->setPath($this->resolve($route->getPath()));
+			$route->setHost($this->resolve($route->getHost()));
+
+			$schemes = array();
+			foreach ($route->getSchemes() as $scheme)
+			{
+				$schemes = array_merge($schemes, explode('|', $this->resolve($scheme)));
+			}
+
+			$route->setSchemes($schemes);
+			$methods = array();
+			foreach ($route->getMethods() as $method)
+			{
+				$methods = array_merge($methods, explode('|', $this->resolve($method)));
+			}
+
+			$route->setMethods($methods);
+			$route->setCondition($this->resolve($route->getCondition()));
+		}
+	}
+
+	/**
+	 * Recursively replaces placeholders with the service container parameters.
+	 *
+	 * @param mixed $value The source which might contain "%placeholders%"
+	 *
+	 * @return mixed The source with the placeholders replaced by the container
+	 *               parameters. Arrays are resolved recursively.
+	 *
+	 * @throws ParameterNotFoundException When a placeholder does not exist as a container parameter
+	 * @throws RuntimeException           When a container value is not a string or a numeric value
+	 */
+	private function resolve($value)
+	{
+		if (is_array($value))
+		{
+			foreach ($value as $key => $val)
+			{
+				$value[$key] = $this->resolve($val);
+			}
+
+			return $value;
+		}
+
+		if (!is_string($value))
+		{
+			return $value;
+		}
+
+		$container = $this->container;
+		$escapedValue = preg_replace_callback('/%%|%([^%\s]++)%/', function ($match) use ($container, $value)
+		{
+			// skip %%
+			if (!isset($match[1]))
+			{
+				return '%%';
+			}
+
+			$resolved = $container->getParameter($match[1]);
+			if (is_string($resolved) || is_numeric($resolved))
+			{
+				return (string) $resolved;
+			}
+
+			throw new RuntimeException(sprintf(
+					'The container parameter "%s", used in the route configuration value "%s", '.
+					'must be a string or numeric, but it is of type %s.',
+					$match[1],
+					$value,
+					gettype($resolved)
+				)
+			);
+		}, $value);
+
+		return str_replace('%%', '%', $escapedValue);
+	}
+}
diff --git a/phpBB/phpbb/search/base.php b/phpBB/phpbb/search/base.php
index d9313dddab..e7d0774b6c 100644
--- a/phpBB/phpbb/search/base.php
+++ b/phpBB/phpbb/search/base.php
@@ -133,7 +133,7 @@ class base
 	{
 		global $cache, $config, $db, $user;
 
-		$length = min(sizeof($id_ary), $config['search_block_size']);
+		$length = min(count($id_ary), $config['search_block_size']);
 
 		// nothing to cache so exit
 		if (!$length)
@@ -148,7 +148,7 @@ class base
 		if (!($store = $cache->get('_search_results_' . $search_key)))
 		{
 			// add the current keywords to the recent searches in the cache which are listed on the search page
-			if (!empty($keywords) || sizeof($author_ary))
+			if (!empty($keywords) || count($author_ary))
 			{
 				$sql = 'SELECT search_time
 					FROM ' . SEARCH_RESULTS_TABLE . '
@@ -201,7 +201,7 @@ class base
 			$store += $store_ids;
 
 			// if the cache is too big
-			if (sizeof($store) - 2 > 20 * $config['search_block_size'])
+			if (count($store) - 2 > 20 * $config['search_block_size'])
 			{
 				// remove everything in front of two blocks in front of the current start index
 				for ($i = 0, $n = $id_range[0] - 2 * $config['search_block_size']; $i < $n; $i++)
@@ -243,7 +243,7 @@ class base
 		global $db, $cache, $config;
 
 		// clear all searches that searched for the specified words
-		if (sizeof($words))
+		if (count($words))
 		{
 			$sql_where = '';
 			foreach ($words as $word)
@@ -264,7 +264,7 @@ class base
 		}
 
 		// clear all searches that searched for the specified authors
-		if (is_array($authors) && sizeof($authors))
+		if (is_array($authors) && count($authors))
 		{
 			$sql_where = '';
 			foreach ($authors as $author)
@@ -286,7 +286,7 @@ class base
 
 		$sql = 'DELETE
 			FROM ' . SEARCH_RESULTS_TABLE . '
-			WHERE search_time < ' . (time() - $config['search_store_results']);
+			WHERE search_time < ' . (time() - (int) $config['search_store_results']);
 		$db->sql_query($sql);
 	}
 }
diff --git a/phpBB/phpbb/search/fulltext_mysql.php b/phpBB/phpbb/search/fulltext_mysql.php
index 64a63e83e0..1105d0892f 100644
--- a/phpBB/phpbb/search/fulltext_mysql.php
+++ b/phpBB/phpbb/search/fulltext_mysql.php
@@ -188,7 +188,7 @@ class fulltext_mysql extends \phpbb\search\base
 		}
 
 		$sql = 'SHOW VARIABLES
-			LIKE \'ft\_%\'';
+			LIKE \'%ft\_%\'';
 		$result = $this->db->sql_query($sql);
 
 		$mysql_info = array();
@@ -198,8 +198,16 @@ class fulltext_mysql extends \phpbb\search\base
 		}
 		$this->db->sql_freeresult($result);
 
-		set_config('fulltext_mysql_max_word_len', $mysql_info['ft_max_word_len']);
-		set_config('fulltext_mysql_min_word_len', $mysql_info['ft_min_word_len']);
+		if ($engine === 'MyISAM')
+		{
+			$this->config->set('fulltext_mysql_max_word_len', $mysql_info['ft_max_word_len']);
+			$this->config->set('fulltext_mysql_min_word_len', $mysql_info['ft_min_word_len']);
+		}
+		else if ($engine === 'InnoDB')
+		{
+			$this->config->set('fulltext_mysql_max_word_len', $mysql_info['innodb_ft_max_token_size']);
+			$this->config->set('fulltext_mysql_min_word_len', $mysql_info['innodb_ft_min_token_size']);
+		}
 
 		return false;
 	}
@@ -232,9 +240,9 @@ class fulltext_mysql extends \phpbb\search\base
 		$this->split_words = $matches[1];
 
 		// We limit the number of allowed keywords to minimize load on the database
-		if ($this->config['max_num_search_keywords'] && sizeof($this->split_words) > $this->config['max_num_search_keywords'])
+		if ($this->config['max_num_search_keywords'] && count($this->split_words) > $this->config['max_num_search_keywords'])
 		{
-			trigger_error($this->user->lang('MAX_NUM_SEARCH_KEYWORDS_REFINE', (int) $this->config['max_num_search_keywords'], sizeof($this->split_words)));
+			trigger_error($this->user->lang('MAX_NUM_SEARCH_KEYWORDS_REFINE', (int) $this->config['max_num_search_keywords'], count($this->split_words)));
 		}
 
 		// to allow phrase search, we need to concatenate quoted words
@@ -361,7 +369,7 @@ class fulltext_mysql extends \phpbb\search\base
 
 		// remove too short or too long words
 		$text = array_values($text);
-		for ($i = 0, $n = sizeof($text); $i < $n; $i++)
+		for ($i = 0, $n = count($text); $i < $n; $i++)
 		{
 			$text[$i] = trim($text[$i]);
 			if (utf8_strlen($text[$i]) < $this->config['fulltext_mysql_min_word_len'] || utf8_strlen($text[$i]) > $this->config['fulltext_mysql_max_word_len'])
@@ -563,12 +571,12 @@ class fulltext_mysql extends \phpbb\search\base
 		$sql_select			= ($type == 'posts') ? $sql_select . 'p.post_id' : 'DISTINCT ' . $sql_select . 't.topic_id';
 		$sql_from			= ($join_topic) ? TOPICS_TABLE . ' t, ' : '';
 		$field				= ($type == 'posts') ? 'post_id' : 'topic_id';
-		if (sizeof($author_ary) && $author_name)
+		if (count($author_ary) && $author_name)
 		{
 			// first one matches post of registered users, second one guests and deleted users
 			$sql_author = ' AND (' . $this->db->sql_in_set('p.poster_id', array_diff($author_ary, array(ANONYMOUS)), false, true) . ' OR p.post_username ' . $author_name . ')';
 		}
-		else if (sizeof($author_ary))
+		else if (count($author_ary))
 		{
 			$sql_author = ' AND ' . $this->db->sql_in_set('p.poster_id', $author_ary);
 		}
@@ -580,7 +588,7 @@ class fulltext_mysql extends \phpbb\search\base
 		$sql_where_options = $sql_sort_join;
 		$sql_where_options .= ($topic_id) ? ' AND p.topic_id = ' . $topic_id : '';
 		$sql_where_options .= ($join_topic) ? ' AND t.topic_id = p.topic_id' : '';
-		$sql_where_options .= (sizeof($ex_fid_ary)) ? ' AND ' . $this->db->sql_in_set('p.forum_id', $ex_fid_ary, true) : '';
+		$sql_where_options .= (count($ex_fid_ary)) ? ' AND ' . $this->db->sql_in_set('p.forum_id', $ex_fid_ary, true) : '';
 		$sql_where_options .= ' AND ' . $post_visibility;
 		$sql_where_options .= $sql_author;
 		$sql_where_options .= ($sort_days) ? ' AND p.post_time >= ' . (time() - ($sort_days * 86400)) : '';
@@ -591,6 +599,7 @@ class fulltext_mysql extends \phpbb\search\base
 			WHERE MATCH ($sql_match) AGAINST ('" . $this->db->sql_escape(htmlspecialchars_decode($this->search_query)) . "' IN BOOLEAN MODE)
 				$sql_where_options
 			ORDER BY $sql_sort";
+		$this->db->sql_return_on_error(true);
 		$result = $this->db->sql_query_limit($sql, $this->config['search_block_size'], $start);
 
 		while ($row = $this->db->sql_fetchrow($result))
@@ -602,7 +611,7 @@ class fulltext_mysql extends \phpbb\search\base
 		$id_ary = array_unique($id_ary);
 
 		// if the total result count is not cached yet, retrieve it from the db
-		if (!$result_count)
+		if (!$result_count && count($id_ary))
 		{
 			$sql_found_rows = 'SELECT FOUND_ROWS() as result_count';
 			$result = $this->db->sql_query($sql_found_rows);
@@ -659,7 +668,7 @@ class fulltext_mysql extends \phpbb\search\base
 	public function author_search($type, $firstpost_only, $sort_by_sql, $sort_key, $sort_dir, $sort_days, $ex_fid_ary, $post_visibility, $topic_id, $author_ary, $author_name, &$id_ary, &$start, $per_page)
 	{
 		// No author? No posts
-		if (!sizeof($author_ary))
+		if (!count($author_ary))
 		{
 			return 0;
 		}
@@ -736,7 +745,7 @@ class fulltext_mysql extends \phpbb\search\base
 		{
 			$sql_author = $this->db->sql_in_set('p.poster_id', $author_ary);
 		}
-		$sql_fora		= (sizeof($ex_fid_ary)) ? ' AND ' . $this->db->sql_in_set('p.forum_id', $ex_fid_ary, true) : '';
+		$sql_fora		= (count($ex_fid_ary)) ? ' AND ' . $this->db->sql_in_set('p.forum_id', $ex_fid_ary, true) : '';
 		$sql_topic_id	= ($topic_id) ? ' AND p.topic_id = ' . (int) $topic_id : '';
 		$sql_time		= ($sort_days) ? ' AND p.post_time >= ' . (time() - ($sort_days * 86400)) : '';
 		$sql_firstpost = ($firstpost_only) ? ' AND p.post_id = t.topic_first_post_id' : '';
@@ -889,7 +898,7 @@ class fulltext_mysql extends \phpbb\search\base
 			$id_ary = array_unique($id_ary);
 		}
 
-		if (sizeof($id_ary))
+		if (count($id_ary))
 		{
 			$this->save_ids($search_key, '', $author_ary, $result_count, $id_ary, $start, $sort_dir);
 			$id_ary = array_slice($id_ary, 0, $per_page);
@@ -917,6 +926,34 @@ class fulltext_mysql extends \phpbb\search\base
 
 		$words = array_unique(array_merge($split_text, $split_title));
 
+		/**
+		* Event to modify method arguments and words before the MySQL search index is updated
+		*
+		* @event core.search_mysql_index_before
+		* @var string	mode				Contains the post mode: edit, post, reply, quote
+		* @var int		post_id				The id of the post which is modified/created
+		* @var string	message				New or updated post content
+		* @var string	subject				New or updated post subject
+		* @var int		poster_id			Post author's user id
+		* @var int		forum_id			The id of the forum in which the post is located
+		* @var array	words				List of words added to the index
+		* @var array	split_text			Array of words from the message
+		* @var array	split_title			Array of words from the title
+		* @since 3.2.3-RC1
+		*/
+		$vars = array(
+			'mode',
+			'post_id',
+			'message',
+			'subject',
+			'poster_id',
+			'forum_id',
+			'words',
+			'split_text',
+			'split_title',
+		);
+		extract($this->phpbb_dispatcher->trigger_event('core.search_mysql_index_before', compact($vars)));
+
 		unset($split_text);
 		unset($split_title);
 
@@ -942,7 +979,7 @@ class fulltext_mysql extends \phpbb\search\base
 		// destroy too old cached search results
 		$this->destroy_cache(array());
 
-		set_config('search_last_gc', time(), true);
+		$this->config->set('search_last_gc', time(), false);
 	}
 
 	/**
@@ -996,12 +1033,37 @@ class fulltext_mysql extends \phpbb\search\base
 			$alter_list[] = $alter_entry;
 		}
 
-		if (sizeof($alter_list))
+		$sql_queries = [];
+
+		foreach ($alter_list as $alter)
 		{
-			foreach ($alter_list as $alter)
-			{
-				$this->db->sql_query('ALTER TABLE ' . POSTS_TABLE . ' ' . implode(', ', $alter));
-			}
+			$sql_queries[] = 'ALTER TABLE ' . POSTS_TABLE . ' ' . implode(', ', $alter);
+		}
+
+		if (!isset($this->stats['post_text']))
+		{
+			$sql_queries[] = 'ALTER TABLE ' . POSTS_TABLE . ' ADD FULLTEXT post_text (post_text)';
+		}
+
+		$stats = $this->stats;
+
+		/**
+		* Event to modify SQL queries before the MySQL search index is created
+		*
+		* @event core.search_mysql_create_index_before
+		* @var array	sql_queries			Array with queries for creating the search index
+		* @var array	stats				Array with statistics of the current index (read only)
+		* @since 3.2.3-RC1
+		*/
+		$vars = array(
+			'sql_queries',
+			'stats',
+		);
+		extract($this->phpbb_dispatcher->trigger_event('core.search_mysql_create_index_before', compact($vars)));
+
+		foreach ($sql_queries as $sql_query)
+		{
+			$this->db->sql_query($sql_query);
 		}
 
 		$this->db->sql_query('TRUNCATE TABLE ' . SEARCH_RESULTS_TABLE);
@@ -1039,9 +1101,37 @@ class fulltext_mysql extends \phpbb\search\base
 			$alter[] = 'DROP INDEX post_content';
 		}
 
-		if (sizeof($alter))
+		if (isset($this->stats['post_text']))
 		{
-			$this->db->sql_query('ALTER TABLE ' . POSTS_TABLE . ' ' . implode(', ', $alter));
+			$alter[] = 'DROP INDEX post_text';
+		}
+
+		$sql_queries = [];
+
+		if (count($alter))
+		{
+			$sql_queries[] = 'ALTER TABLE ' . POSTS_TABLE . ' ' . implode(', ', $alter);
+		}
+
+		$stats = $this->stats;
+
+		/**
+		* Event to modify SQL queries before the MySQL search index is deleted
+		*
+		* @event core.search_mysql_delete_index_before
+		* @var array	sql_queries			Array with queries for deleting the search index
+		* @var array	stats				Array with statistics of the current index (read only)
+		* @since 3.2.3-RC1
+		*/
+		$vars = array(
+			'sql_queries',
+			'stats',
+		);
+		extract($this->phpbb_dispatcher->trigger_event('core.search_mysql_delete_index_before', compact($vars)));
+
+		foreach ($sql_queries as $sql_query)
+		{
+			$this->db->sql_query($sql_query);
 		}
 
 		$this->db->sql_query('TRUNCATE TABLE ' . SEARCH_RESULTS_TABLE);
@@ -1059,7 +1149,7 @@ class fulltext_mysql extends \phpbb\search\base
 			$this->get_stats();
 		}
 
-		return isset($this->stats['post_subject']) && isset($this->stats['post_content']);
+		return isset($this->stats['post_subject']) && isset($this->stats['post_content']) && isset($this->stats['post_text']);
 	}
 
 	/**
@@ -1103,6 +1193,10 @@ class fulltext_mysql extends \phpbb\search\base
 				{
 					$this->stats['post_subject'] = $row;
 				}
+				else if ($row['Key_name'] == 'post_text')
+				{
+					$this->stats['post_text'] = $row;
+				}
 				else if ($row['Key_name'] == 'post_content')
 				{
 					$this->stats['post_content'] = $row;
diff --git a/phpBB/phpbb/search/fulltext_native.php b/phpBB/phpbb/search/fulltext_native.php
index 63b0b24edf..c83de75eed 100644
--- a/phpBB/phpbb/search/fulltext_native.php
+++ b/phpBB/phpbb/search/fulltext_native.php
@@ -18,6 +18,13 @@ namespace phpbb\search;
 */
 class fulltext_native extends \phpbb\search\base
 {
+	const UTF8_HANGUL_FIRST = "\xEA\xB0\x80";
+	const UTF8_HANGUL_LAST = "\xED\x9E\xA3";
+	const UTF8_CJK_FIRST = "\xE4\xB8\x80";
+	const UTF8_CJK_LAST = "\xE9\xBE\xBB";
+	const UTF8_CJK_B_FIRST = "\xF0\xA0\x80\x80";
+	const UTF8_CJK_B_LAST = "\xF0\xAA\x9B\x96";
+
 	/**
 	 * Associative array holding index stats
 	 * @var array
@@ -99,7 +106,7 @@ class fulltext_native extends \phpbb\search\base
 	protected $user;
 
 	/**
-	* Initialises the fulltext_native search backend with min/max word length and makes sure the UTF-8 normalizer is loaded
+	* Initialises the fulltext_native search backend with min/max word length
 	*
 	* @param	boolean|string	&$error	is passed by reference and should either be set to false on success or an error message on failure
 	* @param	\phpbb\event\dispatcher_interface	$phpbb_dispatcher	Event dispatcher object
@@ -113,15 +120,11 @@ class fulltext_native extends \phpbb\search\base
 		$this->phpbb_dispatcher = $phpbb_dispatcher;
 		$this->user = $user;
 
-		$this->word_length = array('min' => $this->config['fulltext_native_min_chars'], 'max' => $this->config['fulltext_native_max_chars']);
+		$this->word_length = array('min' => (int) $this->config['fulltext_native_min_chars'], 'max' => (int) $this->config['fulltext_native_max_chars']);
 
 		/**
 		* Load the UTF tools
 		*/
-		if (!class_exists('utf_normalizer'))
-		{
-			include($this->phpbb_root_path . 'includes/utf/utf_normalizer.' . $this->php_ext);
-		}
 		if (!function_exists('utf8_decode_ncr'))
 		{
 			include($this->phpbb_root_path . 'includes/utf/utf_tools.' . $this->php_ext);
@@ -187,7 +190,7 @@ class fulltext_native extends \phpbb\search\base
 	*/
 	public function split_keywords($keywords, $terms)
 	{
-		$tokens = '+-|()*';
+		$tokens = '+-|()* ';
 
 		$keywords = trim($this->cleanup($keywords, $tokens));
 
@@ -221,12 +224,10 @@ class fulltext_native extends \phpbb\search\base
 						$keywords[$i] = '|';
 					break;
 					case '*':
-						if ($i === 0 || ($keywords[$i - 1] !== '*' && strcspn($keywords[$i - 1], $tokens) === 0))
+						// $i can never be 0 here since $open_bracket is initialised to false
+						if (strpos($tokens, $keywords[$i - 1]) !== false && ($i + 1 === $n || strpos($tokens, $keywords[$i + 1]) !== false))
 						{
-							if ($i === $n - 1 || ($keywords[$i + 1] !== '*' && strcspn($keywords[$i + 1], $tokens) === 0))
-							{
-								$keywords = substr($keywords, 0, $i) . substr($keywords, $i + 1);
-							}
+							$keywords[$i] = '|';
 						}
 					break;
 				}
@@ -261,7 +262,7 @@ class fulltext_native extends \phpbb\search\base
 			}
 		}
 
-		if ($open_bracket)
+		if ($open_bracket !== false)
 		{
 			$keywords .= ')';
 		}
@@ -282,7 +283,7 @@ class fulltext_native extends \phpbb\search\base
 		);
 
 		$keywords = preg_replace($match, $replace, $keywords);
-		$num_keywords = sizeof(explode(' ', $keywords));
+		$num_keywords = count(explode(' ', $keywords));
 
 		// We limit the number of allowed keywords to minimize load on the database
 		if ($this->config['max_num_search_keywords'] && $num_keywords > $this->config['max_num_search_keywords'])
@@ -298,12 +299,26 @@ class fulltext_native extends \phpbb\search\base
 			$words = array();
 
 			preg_match_all('#([^\\s+\\-|()]+)(?:$|[\\s+\\-|()])#u', $keywords, $words);
-			if (sizeof($words[1]))
+			if (count($words[1]))
 			{
 				$keywords = '(' . implode('|', $words[1]) . ')';
 			}
 		}
 
+		// Remove non trailing wildcards from each word to prevent a full table scan (it's now using the database index)
+		$match = '#\*(?!$|\s)#';
+		$replace = '$1';
+		$keywords = preg_replace($match, $replace, $keywords);
+
+		// Only allow one wildcard in the search query to limit the database load
+		$match = '#\*#';
+		$replace = '$1';
+		$count_wildcards = substr_count($keywords, '*');
+
+		// Reverse the string to remove all wildcards except the first one
+		$keywords = strrev(preg_replace($match, $replace, strrev($keywords), $count_wildcards - 1));
+		unset($count_wildcards);
+
 		// set the search_query which is shown to the user
 		$this->search_query = $keywords;
 
@@ -313,7 +328,7 @@ class fulltext_native extends \phpbb\search\base
 
 		$common_ids = $words = array();
 
-		if (sizeof($exact_words))
+		if (count($exact_words))
 		{
 			$sql = 'SELECT word_id, word_text, word_common
 				FROM ' . SEARCH_WORDLIST_TABLE . '
@@ -349,9 +364,6 @@ class fulltext_native extends \phpbb\search\base
 		$this->must_not_contain_ids = array();
 		$this->must_exclude_one_ids = array();
 
-		$mode = '';
-		$ignore_no_id = true;
-
 		foreach ($query as $word)
 		{
 			if (empty($word))
@@ -409,8 +421,16 @@ class fulltext_native extends \phpbb\search\base
 				{
 					if (strpos($word_part, '*') !== false)
 					{
-						$id_words[] = '\'' . $this->db->sql_escape(str_replace('*', '%', $word_part)) . '\'';
-						$non_common_words[] = $word_part;
+						$len = utf8_strlen(str_replace('*', '', $word_part));
+						if ($len >= $this->word_length['min'] && $len <= $this->word_length['max'])
+						{
+							$id_words[] = '\'' . $this->db->sql_escape(str_replace('*', '%', $word_part)) . '\'';
+							$non_common_words[] = $word_part;
+						}
+						else
+						{
+							$this->common_words[] = $word_part;
+						}
 					}
 					else if (isset($words[$word_part]))
 					{
@@ -426,10 +446,10 @@ class fulltext_native extends \phpbb\search\base
 						}
 					}
 				}
-				if (sizeof($id_words))
+				if (count($id_words))
 				{
 					sort($id_words);
-					if (sizeof($id_words) > 1)
+					if (count($id_words) > 1)
 					{
 						$this->{$mode . '_ids'}[] = $id_words;
 					}
@@ -440,7 +460,7 @@ class fulltext_native extends \phpbb\search\base
 					}
 				}
 				// throw an error if we shall not ignore unexistant words
-				else if (!$ignore_no_id && sizeof($non_common_words))
+				else if (!$ignore_no_id && count($non_common_words))
 				{
 					trigger_error(sprintf($this->user->lang['WORDS_IN_NO_POST'], implode($this->user->lang['COMMA_SEPARATOR'], $non_common_words)));
 				}
@@ -480,7 +500,7 @@ class fulltext_native extends \phpbb\search\base
 		}
 
 		// Return true if all words are not common words
-		if (sizeof($exact_words) - sizeof($this->common_words) > 0)
+		if (count($exact_words) - count($this->common_words) > 0)
 		{
 			return true;
 		}
@@ -594,7 +614,6 @@ class fulltext_native extends \phpbb\search\base
 		$id_ary = array();
 
 		$sql_where = array();
-		$group_by = false;
 		$m_num = 0;
 		$w_num = 0;
 
@@ -717,7 +736,7 @@ class fulltext_native extends \phpbb\search\base
 			}
 		}
 
-		if (sizeof($this->must_not_contain_ids))
+		if (count($this->must_not_contain_ids))
 		{
 			$sql_array['LEFT_JOIN'][] = array(
 				'FROM'	=> array(SEARCH_WORDMATCH_TABLE => 'm' . $m_num),
@@ -827,7 +846,7 @@ class fulltext_native extends \phpbb\search\base
 			$sql_where[] = 'p.topic_id = ' . $topic_id;
 		}
 
-		if (sizeof($author_ary))
+		if (count($author_ary))
 		{
 			if ($author_name)
 			{
@@ -841,7 +860,7 @@ class fulltext_native extends \phpbb\search\base
 			$sql_where[] = $sql_author;
 		}
 
-		if (sizeof($ex_fid_ary))
+		if (count($ex_fid_ary))
 		{
 			$sql_where[] = $this->db->sql_in_set('p.forum_id', $ex_fid_ary, true);
 		}
@@ -879,7 +898,6 @@ class fulltext_native extends \phpbb\search\base
 
 				break;
 
-				case 'sqlite':
 				case 'sqlite3':
 					$sql_array_count['SELECT'] = ($type == 'posts') ? 'DISTINCT p.post_id' : 'DISTINCT p.topic_id';
 					$sql = 'SELECT COUNT(' . (($type == 'posts') ? 'post_id' : 'topic_id') . ') as total_results
@@ -1012,7 +1030,7 @@ class fulltext_native extends \phpbb\search\base
 	public function author_search($type, $firstpost_only, $sort_by_sql, $sort_key, $sort_dir, $sort_days, $ex_fid_ary, $post_visibility, $topic_id, $author_ary, $author_name, &$id_ary, &$start, $per_page)
 	{
 		// No author? No posts
-		if (!sizeof($author_ary))
+		if (!count($author_ary))
 		{
 			return 0;
 		}
@@ -1084,7 +1102,7 @@ class fulltext_native extends \phpbb\search\base
 		{
 			$sql_author = $this->db->sql_in_set('p.poster_id', $author_ary);
 		}
-		$sql_fora		= (sizeof($ex_fid_ary)) ? ' AND ' . $this->db->sql_in_set('p.forum_id', $ex_fid_ary, true) : '';
+		$sql_fora		= (count($ex_fid_ary)) ? ' AND ' . $this->db->sql_in_set('p.forum_id', $ex_fid_ary, true) : '';
 		$sql_time		= ($sort_days) ? ' AND p.post_time >= ' . (time() - ($sort_days * 86400)) : '';
 		$sql_topic_id	= ($topic_id) ? ' AND p.topic_id = ' . (int) $topic_id : '';
 		$sql_firstpost = ($firstpost_only) ? ' AND p.post_id = t.topic_first_post_id' : '';
@@ -1186,7 +1204,7 @@ class fulltext_native extends \phpbb\search\base
 					}
 					else
 					{
-						if ($this->db->get_sql_layer() == 'sqlite' || $this->db->get_sql_layer() == 'sqlite3')
+						if ($this->db->get_sql_layer() == 'sqlite3')
 						{
 							$sql = 'SELECT COUNT(topic_id) as total_results
 								FROM (SELECT DISTINCT t.topic_id';
@@ -1203,7 +1221,7 @@ class fulltext_native extends \phpbb\search\base
 								$post_visibility
 								$sql_fora
 								AND t.topic_id = p.topic_id
-								$sql_time" . (($this->db->get_sql_layer() == 'sqlite' || $this->db->get_sql_layer() == 'sqlite3') ? ')' : '');
+								$sql_time" . ($this->db->get_sql_layer() == 'sqlite3' ? ')' : '');
 					}
 					$result = $this->db->sql_query($sql);
 
@@ -1291,7 +1309,7 @@ class fulltext_native extends \phpbb\search\base
 			$this->db->sql_freeresult($result);
 		}
 
-		if (sizeof($id_ary))
+		if (count($id_ary))
 		{
 			$this->save_ids($search_key, '', $author_ary, $total_results, $id_ary, $start, $sort_dir);
 			$id_ary = array_slice($id_ary, 0, $per_page);
@@ -1325,7 +1343,6 @@ class fulltext_native extends \phpbb\search\base
 		$match[] = '#\[\/?[a-z0-9\*\+\-]+(?:=.*?)?(?::[a-z])?(\:?[0-9a-z]{5,})\]#';
 
 		$min = $this->word_length['min'];
-		$max = $this->word_length['max'];
 
 		$isset_min = $min - 1;
 
@@ -1361,9 +1378,9 @@ class fulltext_native extends \phpbb\search\base
 				* Note: this could be optimized. If the codepoint is lower than Hangul's range
 				* we know that it will also be lower than CJK ranges
 				*/
-				if ((strncmp($word, UTF8_HANGUL_FIRST, 3) < 0 || strncmp($word, UTF8_HANGUL_LAST, 3) > 0)
-					&& (strncmp($word, UTF8_CJK_FIRST, 3) < 0 || strncmp($word, UTF8_CJK_LAST, 3) > 0)
-					&& (strncmp($word, UTF8_CJK_B_FIRST, 4) < 0 || strncmp($word, UTF8_CJK_B_LAST, 4) > 0))
+				if ((strncmp($word, self::UTF8_HANGUL_FIRST, 3) < 0 || strncmp($word, self::UTF8_HANGUL_LAST, 3) > 0)
+					&& (strncmp($word, self::UTF8_CJK_FIRST, 3) < 0 || strncmp($word, self::UTF8_CJK_LAST, 3) > 0)
+					&& (strncmp($word, self::UTF8_CJK_B_FIRST, 4) < 0 || strncmp($word, self::UTF8_CJK_B_LAST, 4) > 0))
 				{
 					$word = strtok(' ');
 					continue;
@@ -1436,6 +1453,38 @@ class fulltext_native extends \phpbb\search\base
 			$words['del']['post'] = array();
 			$words['del']['title'] = array();
 		}
+
+		/**
+		* Event to modify method arguments and words before the native search index is updated
+		*
+		* @event core.search_native_index_before
+		* @var string	mode				Contains the post mode: edit, post, reply, quote
+		* @var int		post_id				The id of the post which is modified/created
+		* @var string	message				New or updated post content
+		* @var string	subject				New or updated post subject
+		* @var int		poster_id			Post author's user id
+		* @var int		forum_id			The id of the forum in which the post is located
+		* @var array	words				Grouped lists of words added to or remove from the index
+		* @var array	split_text			Array of words from the message
+		* @var array	split_title			Array of words from the title
+		* @var array	cur_words			Array of words currently in the index for comparing to new words
+		* 									when mode is edit. Empty for other modes.
+		* @since 3.2.3-RC1
+		*/
+		$vars = array(
+			'mode',
+			'post_id',
+			'message',
+			'subject',
+			'poster_id',
+			'forum_id',
+			'words',
+			'split_text',
+			'split_title',
+			'cur_words',
+		);
+		extract($this->phpbb_dispatcher->trigger_event('core.search_native_index_before', compact($vars)));
+
 		unset($split_text);
 		unset($split_title);
 
@@ -1446,7 +1495,7 @@ class fulltext_native extends \phpbb\search\base
 		// individual arrays of added and removed words for text and title. What
 		// we need to do now is add the new words (if they don't already exist)
 		// and then add (or remove) matches between the words and this post
-		if (sizeof($unique_add_words))
+		if (count($unique_add_words))
 		{
 			$sql = 'SELECT word_id, word_text
 				FROM ' . SEARCH_WORDLIST_TABLE . '
@@ -1462,7 +1511,7 @@ class fulltext_native extends \phpbb\search\base
 			$new_words = array_diff($unique_add_words, array_keys($word_ids));
 
 			$this->db->sql_transaction('begin');
-			if (sizeof($new_words))
+			if (count($new_words))
 			{
 				$sql_ary = array();
 
@@ -1486,7 +1535,7 @@ class fulltext_native extends \phpbb\search\base
 		{
 			$title_match = ($word_in == 'title') ? 1 : 0;
 
-			if (sizeof($word_ary))
+			if (count($word_ary))
 			{
 				$sql_in = array();
 				foreach ($word_ary as $word)
@@ -1515,7 +1564,7 @@ class fulltext_native extends \phpbb\search\base
 		{
 			$title_match = ($word_in == 'title') ? 1 : 0;
 
-			if (sizeof($word_ary))
+			if (count($word_ary))
 			{
 				$sql = 'INSERT INTO ' . SEARCH_WORDMATCH_TABLE . ' (post_id, word_id, title_match)
 					SELECT ' . (int) $post_id . ', word_id, ' . (int) $title_match . '
@@ -1546,7 +1595,7 @@ class fulltext_native extends \phpbb\search\base
 	*/
 	public function index_remove($post_ids, $author_ids, $forum_ids)
 	{
-		if (sizeof($post_ids))
+		if (count($post_ids))
 		{
 			$sql = 'SELECT w.word_id, w.word_text, m.title_match
 				FROM ' . SEARCH_WORDMATCH_TABLE . ' m, ' . SEARCH_WORDLIST_TABLE . ' w
@@ -1569,7 +1618,7 @@ class fulltext_native extends \phpbb\search\base
 			}
 			$this->db->sql_freeresult($result);
 
-			if (sizeof($title_word_ids))
+			if (count($title_word_ids))
 			{
 				$sql = 'UPDATE ' . SEARCH_WORDLIST_TABLE . '
 					SET word_count = word_count - 1
@@ -1578,7 +1627,7 @@ class fulltext_native extends \phpbb\search\base
 				$this->db->sql_query($sql);
 			}
 
-			if (sizeof($message_word_ids))
+			if (count($message_word_ids))
 			{
 				$sql = 'UPDATE ' . SEARCH_WORDLIST_TABLE . '
 					SET word_count = word_count - 1
@@ -1608,7 +1657,7 @@ class fulltext_native extends \phpbb\search\base
 		// carry on ... it's okay ... I know when I'm not wanted boo hoo
 		if (!$this->config['fulltext_native_load_upd'])
 		{
-			set_config('search_last_gc', time(), true);
+			$this->config->set('search_last_gc', time(), false);
 			return;
 		}
 
@@ -1633,7 +1682,7 @@ class fulltext_native extends \phpbb\search\base
 			}
 			$this->db->sql_freeresult($result);
 
-			if (sizeof($sql_in))
+			if (count($sql_in))
 			{
 				// Flag the words
 				$sql = 'UPDATE ' . SEARCH_WORDLIST_TABLE . '
@@ -1643,7 +1692,7 @@ class fulltext_native extends \phpbb\search\base
 
 				// by setting search_last_gc to the new time here we make sure that if a user reloads because the
 				// following query takes too long, he won't run into it again
-				set_config('search_last_gc', time(), true);
+				$this->config->set('search_last_gc', time(), false);
 
 				// Delete the matches
 				$sql = 'DELETE FROM ' . SEARCH_WORDMATCH_TABLE . '
@@ -1653,13 +1702,13 @@ class fulltext_native extends \phpbb\search\base
 			unset($sql_in);
 		}
 
-		if (sizeof($destroy_cache_words))
+		if (count($destroy_cache_words))
 		{
 			// destroy cached search results containing any of the words that are now common or were removed
 			$this->destroy_cache(array_unique($destroy_cache_words));
 		}
 
-		set_config('search_last_gc', time(), true);
+		$this->config->set('search_last_gc', time(), false);
 	}
 
 	/**
@@ -1667,21 +1716,43 @@ class fulltext_native extends \phpbb\search\base
 	*/
 	public function delete_index($acp_module, $u_action)
 	{
+		$sql_queries = [];
+
 		switch ($this->db->get_sql_layer())
 		{
-			case 'sqlite':
 			case 'sqlite3':
-				$this->db->sql_query('DELETE FROM ' . SEARCH_WORDLIST_TABLE);
-				$this->db->sql_query('DELETE FROM ' . SEARCH_WORDMATCH_TABLE);
-				$this->db->sql_query('DELETE FROM ' . SEARCH_RESULTS_TABLE);
+				$sql_queries[] = 'DELETE FROM ' . SEARCH_WORDLIST_TABLE;
+				$sql_queries[] = 'DELETE FROM ' . SEARCH_WORDMATCH_TABLE;
+				$sql_queries[] = 'DELETE FROM ' . SEARCH_RESULTS_TABLE;
 			break;
 
 			default:
-				$this->db->sql_query('TRUNCATE TABLE ' . SEARCH_WORDLIST_TABLE);
-				$this->db->sql_query('TRUNCATE TABLE ' . SEARCH_WORDMATCH_TABLE);
-				$this->db->sql_query('TRUNCATE TABLE ' . SEARCH_RESULTS_TABLE);
+				$sql_queries[] = 'TRUNCATE TABLE ' . SEARCH_WORDLIST_TABLE;
+				$sql_queries[] = 'TRUNCATE TABLE ' . SEARCH_WORDMATCH_TABLE;
+				$sql_queries[] = 'TRUNCATE TABLE ' . SEARCH_RESULTS_TABLE;
 			break;
 		}
+
+		$stats = $this->stats;
+
+		/**
+		* Event to modify SQL queries before the native search index is deleted
+		*
+		* @event core.search_native_delete_index_before
+		* @var array	sql_queries			Array with queries for deleting the search index
+		* @var array	stats				Array with statistics of the current index (read only)
+		* @since 3.2.3-RC1
+		*/
+		$vars = array(
+			'sql_queries',
+			'stats',
+		);
+		extract($this->phpbb_dispatcher->trigger_event('core.search_native_delete_index_before', compact($vars)));
+
+		foreach ($sql_queries as $sql_query)
+		{
+			$this->db->sql_query($sql_query);
+		}
 	}
 
 	/**
@@ -1689,7 +1760,7 @@ class fulltext_native extends \phpbb\search\base
 	*/
 	public function index_created()
 	{
-		if (!sizeof($this->stats))
+		if (!count($this->stats))
 		{
 			$this->get_stats();
 		}
@@ -1702,7 +1773,7 @@ class fulltext_native extends \phpbb\search\base
 	*/
 	public function index_stats()
 	{
-		if (!sizeof($this->stats))
+		if (!count($this->stats))
 		{
 			$this->get_stats();
 		}
@@ -1730,13 +1801,11 @@ class fulltext_native extends \phpbb\search\base
 	* @param	string	$allowed_chars	String of special chars to allow
 	* @param	string	$encoding		Text encoding
 	* @return	string					Cleaned up text, only alphanumeric chars are left
-	*
-	* @todo \normalizer::cleanup being able to be used?
 	*/
 	protected function cleanup($text, $allowed_chars = null, $encoding = 'utf-8')
 	{
 		static $conv = array(), $conv_loaded = array();
-		$words = $allow = array();
+		$allow = array();
 
 		// Convert the text to UTF-8
 		$encoding = strtolower($encoding);
@@ -1758,12 +1827,9 @@ class fulltext_native extends \phpbb\search\base
 		$text = htmlspecialchars_decode(utf8_decode_ncr($text), ENT_QUOTES);
 
 		/**
-		* Load the UTF-8 normalizer
-		*
-		* If we use it more widely, an instance of that class should be held in a
-		* a global variable instead
+		* Normalize to NFC
 		*/
-		\utf_normalizer::nfc($text);
+		$text = \Normalizer::normalize($text);
 
 		/**
 		* The first thing we do is:
@@ -1856,9 +1922,9 @@ class fulltext_native extends \phpbb\search\base
 			$utf_char = substr($text, $pos, $utf_len);
 			$pos += $utf_len;
 
-			if (($utf_char >= UTF8_HANGUL_FIRST && $utf_char <= UTF8_HANGUL_LAST)
-				|| ($utf_char >= UTF8_CJK_FIRST && $utf_char <= UTF8_CJK_LAST)
-				|| ($utf_char >= UTF8_CJK_B_FIRST && $utf_char <= UTF8_CJK_B_LAST))
+			if (($utf_char >= self::UTF8_HANGUL_FIRST && $utf_char <= self::UTF8_HANGUL_LAST)
+				|| ($utf_char >= self::UTF8_CJK_FIRST && $utf_char <= self::UTF8_CJK_LAST)
+				|| ($utf_char >= self::UTF8_CJK_B_FIRST && $utf_char <= self::UTF8_CJK_B_LAST))
 			{
 				/**
 				* All characters within these ranges are valid
diff --git a/phpBB/phpbb/search/fulltext_postgres.php b/phpBB/phpbb/search/fulltext_postgres.php
index 04441e6226..2f387e791e 100644
--- a/phpBB/phpbb/search/fulltext_postgres.php
+++ b/phpBB/phpbb/search/fulltext_postgres.php
@@ -294,7 +294,7 @@ class fulltext_postgres extends \phpbb\search\base
 
 		// remove too short or too long words
 		$text = array_values($text);
-		for ($i = 0, $n = sizeof($text); $i < $n; $i++)
+		for ($i = 0, $n = count($text); $i < $n; $i++)
 		{
 			$text[$i] = trim($text[$i]);
 			if (utf8_strlen($text[$i]) < $this->config['fulltext_postgres_min_word_len'] || utf8_strlen($text[$i]) > $this->config['fulltext_postgres_max_word_len'])
@@ -498,17 +498,16 @@ class fulltext_postgres extends \phpbb\search\base
 		);
 		extract($this->phpbb_dispatcher->trigger_event('core.search_postgres_keywords_main_query_before', compact($vars)));
 
-		$sql_select			= ($type == 'posts') ? 'p.post_id' : 'DISTINCT t.topic_id';
+		$sql_select			= ($type == 'posts') ? 'p.post_id' : 'DISTINCT t.topic_id, ' . $sort_by_sql[$sort_key];
 		$sql_from			= ($join_topic) ? TOPICS_TABLE . ' t, ' : '';
 		$field				= ($type == 'posts') ? 'post_id' : 'topic_id';
-		$sql_author			= (sizeof($author_ary) == 1) ? ' = ' . $author_ary[0] : 'IN (' . implode(', ', $author_ary) . ')';
 
-		if (sizeof($author_ary) && $author_name)
+		if (count($author_ary) && $author_name)
 		{
 			// first one matches post of registered users, second one guests and deleted users
 			$sql_author = '(' . $this->db->sql_in_set('p.poster_id', array_diff($author_ary, array(ANONYMOUS)), false, true) . ' OR p.post_username ' . $author_name . ')';
 		}
-		else if (sizeof($author_ary))
+		else if (count($author_ary))
 		{
 			$sql_author = ' AND ' . $this->db->sql_in_set('p.poster_id', $author_ary);
 		}
@@ -520,13 +519,12 @@ class fulltext_postgres extends \phpbb\search\base
 		$sql_where_options = $sql_sort_join;
 		$sql_where_options .= ($topic_id) ? ' AND p.topic_id = ' . $topic_id : '';
 		$sql_where_options .= ($join_topic) ? ' AND t.topic_id = p.topic_id' : '';
-		$sql_where_options .= (sizeof($ex_fid_ary)) ? ' AND ' . $this->db->sql_in_set('p.forum_id', $ex_fid_ary, true) : '';
+		$sql_where_options .= (count($ex_fid_ary)) ? ' AND ' . $this->db->sql_in_set('p.forum_id', $ex_fid_ary, true) : '';
 		$sql_where_options .= ' AND ' . $post_visibility;
 		$sql_where_options .= $sql_author;
 		$sql_where_options .= ($sort_days) ? ' AND p.post_time >= ' . (time() - ($sort_days * 86400)) : '';
 		$sql_where_options .= $sql_match_where;
 
-		$tmp_sql_match = array();
 		$sql_match = str_replace(',', " || ' ' ||", $sql_match);
 		$tmp_sql_match = "to_tsvector ('" . $this->db->sql_escape($this->config['fulltext_postgres_ts_name']) . "', " . $sql_match . ") @@ to_tsquery ('" . $this->db->sql_escape($this->config['fulltext_postgres_ts_name']) . "', '" . $this->db->sql_escape($this->tsearch_query) . "')";
 
@@ -611,7 +609,7 @@ class fulltext_postgres extends \phpbb\search\base
 	public function author_search($type, $firstpost_only, $sort_by_sql, $sort_key, $sort_dir, $sort_days, $ex_fid_ary, $post_visibility, $topic_id, $author_ary, $author_name, &$id_ary, &$start, $per_page)
 	{
 		// No author? No posts
-		if (!sizeof($author_ary))
+		if (!count($author_ary))
 		{
 			return 0;
 		}
@@ -688,7 +686,7 @@ class fulltext_postgres extends \phpbb\search\base
 		{
 			$sql_author = $this->db->sql_in_set('p.poster_id', $author_ary);
 		}
-		$sql_fora		= (sizeof($ex_fid_ary)) ? ' AND ' . $this->db->sql_in_set('p.forum_id', $ex_fid_ary, true) : '';
+		$sql_fora		= (count($ex_fid_ary)) ? ' AND ' . $this->db->sql_in_set('p.forum_id', $ex_fid_ary, true) : '';
 		$sql_topic_id	= ($topic_id) ? ' AND p.topic_id = ' . (int) $topic_id : '';
 		$sql_time		= ($sort_days) ? ' AND p.post_time >= ' . (time() - ($sort_days * 86400)) : '';
 		$sql_firstpost = ($firstpost_only) ? ' AND p.post_id = t.topic_first_post_id' : '';
@@ -838,7 +836,7 @@ class fulltext_postgres extends \phpbb\search\base
 					GROUP BY t.topic_id, $sort_by_sql[$sort_key]";
 			}
 
-			$result = $this->db->sql_query($sql_count);
+			$this->db->sql_query($sql_count);
 			$result_count = (int) $this->db->sql_fetchfield('result_count');
 
 			if (!$result_count)
@@ -863,7 +861,7 @@ class fulltext_postgres extends \phpbb\search\base
 			$id_ary = array_unique($id_ary);
 		}
 
-		if (sizeof($id_ary))
+		if (count($id_ary))
 		{
 			$this->save_ids($search_key, '', $author_ary, $result_count, $id_ary, $start, $sort_dir);
 			$id_ary = array_slice($id_ary, 0, $per_page);
@@ -891,6 +889,34 @@ class fulltext_postgres extends \phpbb\search\base
 
 		$words = array_unique(array_merge($split_text, $split_title));
 
+		/**
+		* Event to modify method arguments and words before the PostgreSQL search index is updated
+		*
+		* @event core.search_postgres_index_before
+		* @var string	mode				Contains the post mode: edit, post, reply, quote
+		* @var int		post_id				The id of the post which is modified/created
+		* @var string	message				New or updated post content
+		* @var string	subject				New or updated post subject
+		* @var int		poster_id			Post author's user id
+		* @var int		forum_id			The id of the forum in which the post is located
+		* @var array	words				Array of words added to the index
+		* @var array	split_text			Array of words from the message
+		* @var array	split_title			Array of words from the title
+		* @since 3.2.3-RC1
+		*/
+		$vars = array(
+			'mode',
+			'post_id',
+			'message',
+			'subject',
+			'poster_id',
+			'forum_id',
+			'words',
+			'split_text',
+			'split_title',
+		);
+		extract($this->phpbb_dispatcher->trigger_event('core.search_postgres_index_before', compact($vars)));
+
 		unset($split_text);
 		unset($split_title);
 
@@ -916,7 +942,7 @@ class fulltext_postgres extends \phpbb\search\base
 		// destroy too old cached search results
 		$this->destroy_cache(array());
 
-		set_config('search_last_gc', time(), true);
+		$this->config->set('search_last_gc', time(), false);
 	}
 
 	/**
@@ -937,14 +963,37 @@ class fulltext_postgres extends \phpbb\search\base
 			$this->get_stats();
 		}
 
+		$sql_queries = [];
+
 		if (!isset($this->stats['post_subject']))
 		{
-			$this->db->sql_query("CREATE INDEX " . POSTS_TABLE . "_" . $this->config['fulltext_postgres_ts_name'] . "_post_subject ON " . POSTS_TABLE . " USING gin (to_tsvector ('" . $this->db->sql_escape($this->config['fulltext_postgres_ts_name']) . "', post_subject))");
+			$sql_queries[] = "CREATE INDEX " . POSTS_TABLE . "_" . $this->config['fulltext_postgres_ts_name'] . "_post_subject ON " . POSTS_TABLE . " USING gin (to_tsvector ('" . $this->db->sql_escape($this->config['fulltext_postgres_ts_name']) . "', post_subject))";
 		}
 
 		if (!isset($this->stats['post_content']))
 		{
-			$this->db->sql_query("CREATE INDEX " . POSTS_TABLE . "_" . $this->config['fulltext_postgres_ts_name'] . "_post_content ON " . POSTS_TABLE . " USING gin (to_tsvector ('" . $this->db->sql_escape($this->config['fulltext_postgres_ts_name']) . "', post_text || ' ' || post_subject))");
+			$sql_queries[] = "CREATE INDEX " . POSTS_TABLE . "_" . $this->config['fulltext_postgres_ts_name'] . "_post_content ON " . POSTS_TABLE . " USING gin (to_tsvector ('" . $this->db->sql_escape($this->config['fulltext_postgres_ts_name']) . "', post_text || ' ' || post_subject))";
+		}
+
+		$stats = $this->stats;
+
+		/**
+		* Event to modify SQL queries before the Postgres search index is created
+		*
+		* @event core.search_postgres_create_index_before
+		* @var array	sql_queries			Array with queries for creating the search index
+		* @var array	stats				Array with statistics of the current index (read only)
+		* @since 3.2.3-RC1
+		*/
+		$vars = array(
+			'sql_queries',
+			'stats',
+		);
+		extract($this->phpbb_dispatcher->trigger_event('core.search_postgres_create_index_before', compact($vars)));
+
+		foreach ($sql_queries as $sql_query)
+		{
+			$this->db->sql_query($sql_query);
 		}
 
 		$this->db->sql_query('TRUNCATE TABLE ' . SEARCH_RESULTS_TABLE);
@@ -970,14 +1019,37 @@ class fulltext_postgres extends \phpbb\search\base
 			$this->get_stats();
 		}
 
+		$sql_queries = [];
+
 		if (isset($this->stats['post_subject']))
 		{
-			$this->db->sql_query('DROP INDEX ' . $this->stats['post_subject']['relname']);
+			$sql_queries[] = 'DROP INDEX ' . $this->stats['post_subject']['relname'];
 		}
 
 		if (isset($this->stats['post_content']))
 		{
-			$this->db->sql_query('DROP INDEX ' . $this->stats['post_content']['relname']);
+			$sql_queries[] = 'DROP INDEX ' . $this->stats['post_content']['relname'];
+		}
+
+		$stats = $this->stats;
+
+		/**
+		* Event to modify SQL queries before the Postgres search index is created
+		*
+		* @event core.search_postgres_delete_index_before
+		* @var array	sql_queries			Array with queries for deleting the search index
+		* @var array	stats				Array with statistics of the current index (read only)
+		* @since 3.2.3-RC1
+		*/
+		$vars = array(
+			'sql_queries',
+			'stats',
+		);
+		extract($this->phpbb_dispatcher->trigger_event('core.search_postgres_delete_index_before', compact($vars)));
+
+		foreach ($sql_queries as $sql_query)
+		{
+			$this->db->sql_query($sql_query);
 		}
 
 		$this->db->sql_query('TRUNCATE TABLE ' . SEARCH_RESULTS_TABLE);
diff --git a/phpBB/phpbb/search/fulltext_sphinx.php b/phpBB/phpbb/search/fulltext_sphinx.php
index 0dbc6e33df..227fbd3fd6 100644
--- a/phpBB/phpbb/search/fulltext_sphinx.php
+++ b/phpBB/phpbb/search/fulltext_sphinx.php
@@ -85,7 +85,7 @@ class fulltext_sphinx
 
 	/**
 	 * Database Tools object
-	 * @var \phpbb\db\tools
+	 * @var \phpbb\db\tools\tools_interface
 	 */
 	protected $db_tools;
 
@@ -143,12 +143,13 @@ class fulltext_sphinx
 		$this->db = $db;
 		$this->auth = $auth;
 
-		// Initialize \phpbb\db\tools object
-		$this->db_tools = new \phpbb\db\tools($this->db);
+		// Initialize \phpbb\db\tools\tools object
+		global $phpbb_container; // TODO inject into object
+		$this->db_tools = $phpbb_container->get('dbal.tools');
 
 		if (!$this->config['fulltext_sphinx_id'])
 		{
-			set_config('fulltext_sphinx_id', unique_id());
+			$this->config->set('fulltext_sphinx_id', unique_id());
 		}
 		$this->id = $this->config['fulltext_sphinx_id'];
 		$this->indexes = 'index_phpbb_' . $this->id . '_delta;index_phpbb_' . $this->id . '_main';
@@ -219,7 +220,7 @@ class fulltext_sphinx
 		}
 
 		// Move delta to main index each hour
-		set_config('search_gc', 3600);
+		$this->config->set('search_gc', 3600);
 
 		return false;
 	}
@@ -291,7 +292,6 @@ class fulltext_sphinx
 						AND p.post_id >= $start AND p.post_id <= $end'),
 				array('sql_query_post',				''),
 				array('sql_query_post_index',		'UPDATE ' . SPHINX_TABLE . ' SET max_doc_id = $maxid WHERE counter_id = 1'),
-				array('sql_query_info',				'SELECT * FROM ' . POSTS_TABLE . ' WHERE post_id = $id'),
 				array('sql_attr_uint',				'forum_id'),
 				array('sql_attr_uint',				'topic_id'),
 				array('sql_attr_uint',				'poster_id'),
@@ -303,7 +303,7 @@ class fulltext_sphinx
 				array('sql_attr_string',			'post_subject'),
 			),
 			'source source_phpbb_' . $this->id . '_delta : source_phpbb_' . $this->id . '_main' => array(
-				array('sql_query_pre',				''),
+				array('sql_query_pre',				'SET NAMES \'utf8\''),
 				array('sql_query_range',			''),
 				array('sql_range_step',				''),
 				array('sql_query',					'SELECT
@@ -323,6 +323,7 @@ class fulltext_sphinx
 					WHERE
 						p.topic_id = t.topic_id
 						AND p.post_id >=  ( SELECT max_doc_id FROM ' . SPHINX_TABLE . ' WHERE counter_id=1 )'),
+				array('sql_query_post_index',		''),
 			),
 			'index index_phpbb_' . $this->id . '_main' => array(
 				array('path',						$this->config['fulltext_sphinx_data_path'] . 'index_phpbb_' . $this->id . '_main'),
@@ -331,10 +332,10 @@ class fulltext_sphinx
 				array('morphology',					'none'),
 				array('stopwords',					''),
 				array('min_word_len',				'2'),
-				array('charset_type',				'utf-8'),
 				array('charset_table',				'U+FF10..U+FF19->0..9, 0..9, U+FF41..U+FF5A->a..z, U+FF21..U+FF3A->a..z, A..Z->a..z, a..z, U+0149, U+017F, U+0138, U+00DF, U+00FF, U+00C0..U+00D6->U+00E0..U+00F6, U+00E0..U+00F6, U+00D8..U+00DE->U+00F8..U+00FE, U+00F8..U+00FE, U+0100->U+0101, U+0101, U+0102->U+0103, U+0103, U+0104->U+0105, U+0105, U+0106->U+0107, U+0107, U+0108->U+0109, U+0109, U+010A->U+010B, U+010B, U+010C->U+010D, U+010D, U+010E->U+010F, U+010F, U+0110->U+0111, U+0111, U+0112->U+0113, U+0113, U+0114->U+0115, U+0115, U+0116->U+0117, U+0117, U+0118->U+0119, U+0119, U+011A->U+011B, U+011B, U+011C->U+011D, U+011D, U+011E->U+011F, U+011F, U+0130->U+0131, U+0131, U+0132->U+0133, U+0133, U+0134->U+0135, U+0135, U+0136->U+0137, U+0137, U+0139->U+013A, U+013A, U+013B->U+013C, U+013C, U+013D->U+013E, U+013E, U+013F->U+0140, U+0140, U+0141->U+0142, U+0142, U+0143->U+0144, U+0144, U+0145->U+0146, U+0146, U+0147->U+0148, U+0148, U+014A->U+014B, U+014B, U+014C->U+014D, U+014D, U+014E->U+014F, U+014F, U+0150->U+0151, U+0151, U+0152->U+0153, U+0153, U+0154->U+0155, U+0155, U+0156->U+0157, U+0157, U+0158->U+0159, U+0159, U+015A->U+015B, U+015B, U+015C->U+015D, U+015D, U+015E->U+015F, U+015F, U+0160->U+0161, U+0161, U+0162->U+0163, U+0163, U+0164->U+0165, U+0165, U+0166->U+0167, U+0167, U+0168->U+0169, U+0169, U+016A->U+016B, U+016B, U+016C->U+016D, U+016D, U+016E->U+016F, U+016F, U+0170->U+0171, U+0171, U+0172->U+0173, U+0173, U+0174->U+0175, U+0175, U+0176->U+0177, U+0177, U+0178->U+00FF, U+00FF, U+0179->U+017A, U+017A, U+017B->U+017C, U+017C, U+017D->U+017E, U+017E, U+0410..U+042F->U+0430..U+044F, U+0430..U+044F, U+4E00..U+9FFF'),
 				array('min_prefix_len',				'0'),
 				array('min_infix_len',				'0'),
+				array('html_strip',					'1'),
 			),
 			'index index_phpbb_' . $this->id . '_delta : index_phpbb_' . $this->id . '_main' => array(
 				array('path',						$this->config['fulltext_sphinx_data_path'] . 'index_phpbb_' . $this->id . '_delta'),
@@ -344,14 +345,12 @@ class fulltext_sphinx
 				array('mem_limit',					$this->config['fulltext_sphinx_indexer_mem_limit'] . 'M'),
 			),
 			'searchd' => array(
-				array('compat_sphinxql_magics'	,	'0'),
 				array('listen'	,					($this->config['fulltext_sphinx_host'] ? $this->config['fulltext_sphinx_host'] : 'localhost') . ':' . ($this->config['fulltext_sphinx_port'] ? $this->config['fulltext_sphinx_port'] : '9312')),
 				array('log',						$this->config['fulltext_sphinx_data_path'] . 'log/searchd.log'),
 				array('query_log',					$this->config['fulltext_sphinx_data_path'] . 'log/sphinx-query.log'),
 				array('read_timeout',				'5'),
 				array('max_children',				'30'),
 				array('pid_file',					$this->config['fulltext_sphinx_data_path'] . 'searchd.pid'),
-				array('max_matches',				(string) SPHINX_MAX_MATCHES),
 				array('binlog_path',				$this->config['fulltext_sphinx_data_path']),
 			),
 		);
@@ -403,7 +402,7 @@ class fulltext_sphinx
 					$variable = $section->get_variable_by_name($key);
 					if (!$variable)
 					{
-						$variable = $section->create_variable($key, $value);
+						$section->create_variable($key, $value);
 					}
 					else
 					{
@@ -412,7 +411,7 @@ class fulltext_sphinx
 				}
 				else
 				{
-					$variable = $section->create_variable($key, $value);
+					$section->create_variable($key, $value);
 				}
 			}
 		}
@@ -436,7 +435,6 @@ class fulltext_sphinx
 			$match		= array('#\sand\s#i', '#\sor\s#i', '#\snot\s#i', '#\+#', '#-#', '#\|#', '#@#');
 			$replace	= array(' & ', ' | ', '  - ', ' +', ' -', ' |', '');
 
-			$replacements = 0;
 			$keywords = preg_replace($match, $replace, $keywords);
 			$this->sphinx->SetMatchMode(SPH_MATCH_EXTENDED);
 		}
@@ -479,16 +477,16 @@ class fulltext_sphinx
 	*/
 	public function keyword_search($type, $fields, $terms, $sort_by_sql, $sort_key, $sort_dir, $sort_days, $ex_fid_ary, $post_visibility, $topic_id, $author_ary, $author_name, &$id_ary, &$start, $per_page)
 	{
+		global $user, $phpbb_log;
+
 		// No keywords? No posts.
-		if (!strlen($this->search_query) && !sizeof($author_ary))
+		if (!strlen($this->search_query) && !count($author_ary))
 		{
 			return false;
 		}
 
 		$id_ary = array();
 
-		$join_topic = ($type != 'posts');
-
 		// Sorting
 
 		if ($type == 'topics')
@@ -622,7 +620,7 @@ class fulltext_sphinx
 			break;
 		}
 
-		if (sizeof($author_ary))
+		if (count($author_ary))
 		{
 			$this->sphinx->SetFilter('poster_id', $author_ary);
 		}
@@ -632,14 +630,14 @@ class fulltext_sphinx
 		// but at least it will also cause the same for normal users.
 		$this->sphinx->SetFilter('post_visibility', array(ITEM_APPROVED));
 
-		if (sizeof($ex_fid_ary))
+		if (count($ex_fid_ary))
 		{
 			// All forums that a user is allowed to access
 			$fid_ary = array_unique(array_intersect(array_keys($this->auth->acl_getf('f_read', true)), array_keys($this->auth->acl_getf('f_search', true))));
 			// All forums that the user wants to and can search in
 			$search_forums = array_diff($fid_ary, $ex_fid_ary);
 
-			if (sizeof($search_forums))
+			if (count($search_forums))
 			{
 				$this->sphinx->SetFilter('forum_id', $search_forums);
 			}
@@ -647,8 +645,8 @@ class fulltext_sphinx
 
 		$this->sphinx->SetFilter('deleted', array(0));
 
-		$this->sphinx->SetLimits($start, (int) $per_page, SPHINX_MAX_MATCHES);
-		$result = $this->sphinx->Query($search_query_prefix . str_replace('&quot;', '"', $this->search_query), $this->indexes);
+		$this->sphinx->SetLimits((int) $start, (int) $per_page, max(SPHINX_MAX_MATCHES, (int) $start + $per_page));
+		$result = $this->sphinx->Query($search_query_prefix . $this->sphinx->EscapeString(str_replace('&quot;', '"', $this->search_query)), $this->indexes);
 
 		// Could be connection to localhost:9312 failed (errno=111,
 		// msg=Connection refused) during rotate, retry if so
@@ -656,12 +654,12 @@ class fulltext_sphinx
 		while (!$result && (strpos($this->sphinx->GetLastError(), "errno=111,") !== false) && $retries--)
 		{
 			usleep(SPHINX_CONNECT_WAIT_TIME);
-			$result = $this->sphinx->Query($search_query_prefix . str_replace('&quot;', '"', $this->search_query), $this->indexes);
+			$result = $this->sphinx->Query($search_query_prefix . $this->sphinx->EscapeString(str_replace('&quot;', '"', $this->search_query)), $this->indexes);
 		}
 
 		if ($this->sphinx->GetLastError())
 		{
-			add_log('critical', 'LOG_SPHINX_ERROR', $this->sphinx->GetLastError());
+			$phpbb_log->add('critical', $user->data['user_id'], $user->ip, 'LOG_SPHINX_ERROR', false, array($this->sphinx->GetLastError()));
 			if ($this->auth->acl_get('a_'))
 			{
 				trigger_error($this->user->lang('SPHINX_SEARCH_FAILED', $this->sphinx->GetLastError()));
@@ -678,8 +676,8 @@ class fulltext_sphinx
 		{
 			$start = floor(($result_count - 1) / $per_page) * $per_page;
 
-			$this->sphinx->SetLimits((int) $start, (int) $per_page, SPHINX_MAX_MATCHES);
-			$result = $this->sphinx->Query($search_query_prefix . str_replace('&quot;', '"', $this->search_query), $this->indexes);
+			$this->sphinx->SetLimits((int) $start, (int) $per_page, max(SPHINX_MAX_MATCHES, (int) $start + $per_page));
+			$result = $this->sphinx->Query($search_query_prefix . $this->sphinx->EscapeString(str_replace('&quot;', '"', $this->search_query)), $this->indexes);
 
 			// Could be connection to localhost:9312 failed (errno=111,
 			// msg=Connection refused) during rotate, retry if so
@@ -687,7 +685,7 @@ class fulltext_sphinx
 			while (!$result && (strpos($this->sphinx->GetLastError(), "errno=111,") !== false) && $retries--)
 			{
 				usleep(SPHINX_CONNECT_WAIT_TIME);
-				$result = $this->sphinx->Query($search_query_prefix . str_replace('&quot;', '"', $this->search_query), $this->indexes);
+				$result = $this->sphinx->Query($search_query_prefix . $this->sphinx->EscapeString(str_replace('&quot;', '"', $this->search_query)), $this->indexes);
 			}
 		}
 
@@ -757,6 +755,28 @@ class fulltext_sphinx
 	 */
 	public function index($mode, $post_id, &$message, &$subject, $poster_id, $forum_id)
 	{
+		/**
+		* Event to modify method arguments before the Sphinx search index is updated
+		*
+		* @event core.search_sphinx_index_before
+		* @var string	mode				Contains the post mode: edit, post, reply, quote
+		* @var int		post_id				The id of the post which is modified/created
+		* @var string	message				New or updated post content
+		* @var string	subject				New or updated post subject
+		* @var int		poster_id			Post author's user id
+		* @var int		forum_id			The id of the forum in which the post is located
+		* @since 3.2.3-RC1
+		*/
+		$vars = array(
+			'mode',
+			'post_id',
+			'message',
+			'subject',
+			'poster_id',
+			'forum_id',
+		);
+		extract($this->phpbb_dispatcher->trigger_event('core.search_sphinx_index_before', compact($vars)));
+
 		if ($mode == 'edit')
 		{
 			$this->sphinx->UpdateAttributes($this->indexes, array('forum_id', 'poster_id'), array((int) $post_id => array((int) $forum_id, (int) $poster_id)));
@@ -789,7 +809,7 @@ class fulltext_sphinx
 			}
 			$this->db->sql_freeresult($result);
 
-			if (sizeof($post_updates))
+			if (count($post_updates))
 			{
 				$this->sphinx->UpdateAttributes($this->indexes, array('topic_last_post_time'), $post_updates);
 			}
@@ -815,7 +835,7 @@ class fulltext_sphinx
 	*/
 	public function tidy($create = false)
 	{
-		set_config('search_last_gc', time(), true);
+		$this->config->set('search_last_gc', time(), false);
 	}
 
 	/**
diff --git a/phpBB/phpbb/search/sphinx/config.php b/phpBB/phpbb/search/sphinx/config.php
index 675649b460..3205574b45 100644
--- a/phpBB/phpbb/search/sphinx/config.php
+++ b/phpBB/phpbb/search/sphinx/config.php
@@ -46,7 +46,7 @@ class config
 	*/
 	function get_section_by_name($name)
 	{
-		for ($i = 0, $size = sizeof($this->sections); $i < $size; $i++)
+		for ($i = 0, $size = count($this->sections); $i < $size; $i++)
 		{
 			// Make sure this is really a section object and not a comment
 			if (($this->sections[$i] instanceof \phpbb\search\sphinx\config_section) && $this->sections[$i]->get_name() == $name)
@@ -67,7 +67,7 @@ class config
 	function add_section($name)
 	{
 		$this->sections[] = new \phpbb\search\sphinx\config_section($name, '');
-		return $this->sections[sizeof($this->sections) - 1];
+		return $this->sections[count($this->sections) - 1];
 	}
 
 	/**
diff --git a/phpBB/phpbb/search/sphinx/config_section.php b/phpBB/phpbb/search/sphinx/config_section.php
index 14ab3a752c..2fc8b2da17 100644
--- a/phpBB/phpbb/search/sphinx/config_section.php
+++ b/phpBB/phpbb/search/sphinx/config_section.php
@@ -87,7 +87,7 @@ class config_section
 	*/
 	function get_variable_by_name($name)
 	{
-		for ($i = 0, $size = sizeof($this->variables); $i < $size; $i++)
+		for ($i = 0, $size = count($this->variables); $i < $size; $i++)
 		{
 			// Make sure this is a variable object and not a comment
 			if (($this->variables[$i] instanceof \phpbb\search\sphinx\config_variable) && $this->variables[$i]->get_name() == $name)
@@ -106,7 +106,7 @@ class config_section
 	*/
 	function delete_variables_by_name($name)
 	{
-		for ($i = 0, $size = sizeof($this->variables); $i < $size; $i++)
+		for ($i = 0, $size = count($this->variables); $i < $size; $i++)
 		{
 			// Make sure this is a variable object and not a comment
 			if (($this->variables[$i] instanceof \phpbb\search\sphinx\config_variable) && $this->variables[$i]->get_name() == $name)
@@ -129,7 +129,7 @@ class config_section
 	function create_variable($name, $value)
 	{
 		$this->variables[] = new \phpbb\search\sphinx\config_variable($name, $value, '');
-		return $this->variables[sizeof($this->variables) - 1];
+		return $this->variables[count($this->variables) - 1];
 	}
 
 	/**
diff --git a/phpBB/phpbb/session.php b/phpBB/phpbb/session.php
index 45e82df591..cc5a1b8f8f 100644
--- a/phpBB/phpbb/session.php
+++ b/phpBB/phpbb/session.php
@@ -91,15 +91,24 @@ class session
 			$page_name .= str_replace('%2F', '/', urlencode($symfony_request_path));
 		}
 
-		// current directory within the phpBB root (for example: adm)
-		$root_dirs = explode('/', str_replace('\\', '/', phpbb_realpath($root_path)));
-		$page_dirs = explode('/', str_replace('\\', '/', phpbb_realpath('./')));
+		if (substr($root_path, 0, 2) === './' && strpos($root_path, '..') === false)
+		{
+			$root_dirs = explode('/', str_replace('\\', '/', rtrim($root_path, '/')));
+			$page_dirs = explode('/', str_replace('\\', '/', '.'));
+		}
+		else
+		{
+			// current directory within the phpBB root (for example: adm)
+			$root_dirs = explode('/', str_replace('\\', '/', $phpbb_filesystem->realpath($root_path)));
+			$page_dirs = explode('/', str_replace('\\', '/', $phpbb_filesystem->realpath('./')));
+		}
+
 		$intersection = array_intersect_assoc($root_dirs, $page_dirs);
 
 		$root_dirs = array_diff_assoc($root_dirs, $intersection);
 		$page_dirs = array_diff_assoc($page_dirs, $intersection);
 
-		$page_dir = str_repeat('../', sizeof($root_dirs)) . implode('/', $page_dirs);
+		$page_dir = str_repeat('../', count($root_dirs)) . implode('/', $page_dirs);
 
 		if ($page_dir && substr($page_dir, -1, 1) == '/')
 		{
@@ -118,8 +127,8 @@ class session
 
 		// The script path from the webroot to the phpBB root (for example: /phpBB3/)
 		$script_dirs = explode('/', $script_path);
-		array_splice($script_dirs, -sizeof($page_dirs));
-		$root_script_path = implode('/', $script_dirs) . (sizeof($root_dirs) ? '/' . implode('/', $root_dirs) : '');
+		array_splice($script_dirs, -count($page_dirs));
+		$root_script_path = implode('/', $script_dirs) . (count($root_dirs) ? '/' . implode('/', $root_dirs) : '');
 
 		// We are on the base level (phpBB root == webroot), lets adjust the variables a bit...
 		if (!$root_script_path)
@@ -219,7 +228,7 @@ class session
 	function session_begin($update_session_page = true)
 	{
 		global $phpEx, $SID, $_SID, $_EXTRA_URL, $db, $config, $phpbb_root_path;
-		global $request, $phpbb_container, $phpbb_dispatcher;
+		global $request, $phpbb_container, $user, $phpbb_log, $phpbb_dispatcher;
 
 		// Give us some basic information
 		$this->time_now				= time();
@@ -257,23 +266,23 @@ class session
 
 		if ($request->is_set($config['cookie_name'] . '_sid', \phpbb\request\request_interface::COOKIE) || $request->is_set($config['cookie_name'] . '_u', \phpbb\request\request_interface::COOKIE))
 		{
-			$this->cookie_data['u'] = request_var($config['cookie_name'] . '_u', 0, false, true);
-			$this->cookie_data['k'] = request_var($config['cookie_name'] . '_k', '', false, true);
-			$this->session_id 		= request_var($config['cookie_name'] . '_sid', '', false, true);
+			$this->cookie_data['u'] = $request->variable($config['cookie_name'] . '_u', 0, false, \phpbb\request\request_interface::COOKIE);
+			$this->cookie_data['k'] = $request->variable($config['cookie_name'] . '_k', '', false, \phpbb\request\request_interface::COOKIE);
+			$this->session_id 		= $request->variable($config['cookie_name'] . '_sid', '', false, \phpbb\request\request_interface::COOKIE);
 
 			$SID = (defined('NEED_SID')) ? '?sid=' . $this->session_id : '?sid=';
 			$_SID = (defined('NEED_SID')) ? $this->session_id : '';
 
 			if (empty($this->session_id))
 			{
-				$this->session_id = $_SID = request_var('sid', '');
+				$this->session_id = $_SID = $request->variable('sid', '');
 				$SID = '?sid=' . $this->session_id;
 				$this->cookie_data = array('u' => 0, 'k' => '');
 			}
 		}
 		else
 		{
-			$this->session_id = $_SID = request_var('sid', '');
+			$this->session_id = $_SID = $request->variable('sid', '');
 			$SID = '?sid=' . $this->session_id;
 		}
 
@@ -359,8 +368,8 @@ class session
 			}
 			else
 			{
-				set_config('limit_load', '0');
-				set_config('limit_search_load', '0');
+				$config->set('limit_load', '0');
+				$config->set('limit_search_load', '0');
 			}
 		}
 
@@ -423,6 +432,7 @@ class session
 					$session_expired = false;
 
 					// Check whether the session is still valid if we have one
+					/* @var $provider_collection \phpbb\auth\provider_collection */
 					$provider_collection = $phpbb_container->get('auth.provider_collection');
 					$provider = $provider_collection->get_provider();
 
@@ -473,11 +483,18 @@ class session
 					{
 						if ($referer_valid)
 						{
-							add_log('critical', 'LOG_IP_BROWSER_FORWARDED_CHECK', $u_ip, $s_ip, $u_browser, $s_browser, htmlspecialchars($u_forwarded_for), htmlspecialchars($s_forwarded_for));
+							$phpbb_log->add('critical', $user->data['user_id'], $user->ip, 'LOG_IP_BROWSER_FORWARDED_CHECK', false, array(
+								$u_ip,
+								$s_ip,
+								$u_browser,
+								$s_browser,
+								htmlspecialchars($u_forwarded_for),
+								htmlspecialchars($s_forwarded_for)
+							));
 						}
 						else
 						{
-							add_log('critical', 'LOG_REFERER_INVALID', $this->referer);
+							$phpbb_log->add('critical', $user->data['user_id'], $user->ip, 'LOG_REFERER_INVALID', false, array($this->referer));
 						}
 					}
 				}
@@ -499,7 +516,7 @@ class session
 	*/
 	function session_create($user_id = false, $set_admin = false, $persist_login = false, $viewonline = true)
 	{
-		global $SID, $_SID, $db, $config, $cache, $phpbb_root_path, $phpEx, $phpbb_container, $phpbb_dispatcher;
+		global $SID, $_SID, $db, $config, $cache, $phpbb_container, $phpbb_dispatcher;
 
 		$this->data = array();
 
@@ -562,16 +579,17 @@ class session
 			}
 		}
 
+		/* @var $provider_collection \phpbb\auth\provider_collection */
 		$provider_collection = $phpbb_container->get('auth.provider_collection');
 		$provider = $provider_collection->get_provider();
 		$this->data = $provider->autologin();
 
-		if ($user_id !== false && sizeof($this->data) && $this->data['user_id'] != $user_id)
+		if ($user_id !== false && isset($this->data['user_id']) && $this->data['user_id'] != $user_id)
 		{
 			$this->data = array();
 		}
 
-		if (sizeof($this->data))
+		if (isset($this->data['user_id']))
 		{
 			$this->cookie_data['k'] = '';
 			$this->cookie_data['u'] = $this->data['user_id'];
@@ -579,7 +597,7 @@ class session
 
 		// If we're presented with an autologin key we'll join against it.
 		// Else if we've been passed a user_id we'll grab data based on that
-		if (isset($this->cookie_data['k']) && $this->cookie_data['k'] && $this->cookie_data['u'] && !sizeof($this->data))
+		if (isset($this->cookie_data['k']) && $this->cookie_data['k'] && $this->cookie_data['u'] && empty($this->data))
 		{
 			$sql = 'SELECT u.*
 				FROM ' . USERS_TABLE . ' u, ' . SESSIONS_KEYS_TABLE . ' k
@@ -599,7 +617,7 @@ class session
 			$db->sql_freeresult($result);
 		}
 
-		if ($user_id !== false && !sizeof($this->data))
+		if ($user_id !== false && empty($this->data))
 		{
 			$this->cookie_data['k'] = '';
 			$this->cookie_data['u'] = $user_id;
@@ -627,7 +645,7 @@ class session
 		// User does not exist
 		// User is inactive
 		// User is bot
-		if (!sizeof($this->data) || !is_array($this->data))
+		if (!is_array($this->data) || !count($this->data))
 		{
 			$this->cookie_data['k'] = '';
 			$this->cookie_data['u'] = ($bot) ? $bot : ANONYMOUS;
@@ -820,7 +838,7 @@ class session
 			$sql = 'SELECT COUNT(session_id) AS sessions
 					FROM ' . SESSIONS_TABLE . '
 					WHERE session_user_id = ' . (int) $this->data['user_id'] . '
-					AND session_time >= ' . (int) ($this->time_now - (max($config['session_length'], $config['form_token_lifetime'])));
+					AND session_time >= ' . (int) ($this->time_now - (max((int) $config['session_length'], (int) $config['form_token_lifetime'])));
 			$result = $db->sql_query($sql);
 			$row = $db->sql_fetchrow($result);
 			$db->sql_freeresult($result);
@@ -875,7 +893,7 @@ class session
 	*/
 	function session_kill($new_session = true)
 	{
-		global $SID, $_SID, $db, $config, $phpbb_root_path, $phpEx, $phpbb_container, $phpbb_dispatcher;
+		global $SID, $_SID, $db, $phpbb_container, $phpbb_dispatcher;
 
 		$sql = 'DELETE FROM ' . SESSIONS_TABLE . "
 			WHERE session_id = '" . $db->sql_escape($this->session_id) . "'
@@ -900,6 +918,7 @@ class session
 		unset($session_id);
 
 		// Allow connecting logout with external auth method logout
+		/* @var $provider_collection \phpbb\auth\provider_collection */
 		$provider_collection = $phpbb_container->get('auth.provider_collection');
 		$provider = $provider_collection->get_provider();
 		$provider->logout($this->data, $new_session);
@@ -966,7 +985,7 @@ class session
 	*/
 	function session_gc()
 	{
-		global $db, $config, $phpbb_root_path, $phpEx, $phpbb_container, $phpbb_dispatcher;
+		global $db, $config, $phpbb_container, $phpbb_dispatcher;
 
 		$batch_size = 10;
 
@@ -1003,7 +1022,7 @@ class session
 		}
 		$db->sql_freeresult($result);
 
-		if (sizeof($del_user_id))
+		if (count($del_user_id))
 		{
 			// Delete expired sessions
 			$sql = 'DELETE FROM ' . SESSIONS_TABLE . '
@@ -1016,7 +1035,7 @@ class session
 		{
 			// Less than 10 users, update gc timer ... else we want gc
 			// called again to delete other sessions
-			set_config('session_last_gc', $this->time_now, true);
+			$config->set('session_last_gc', $this->time_now, false);
 
 			if ($config['max_autologin_time'])
 			{
@@ -1026,6 +1045,7 @@ class session
 			}
 
 			// only called from CRON; should be a safe workaround until the infrastructure gets going
+			/* @var $captcha_factory \phpbb\captcha\factory */
 			$captcha_factory = $phpbb_container->get('captcha.factory');
 			$captcha_factory->garbage_collect($config['captcha_plugin']);
 
@@ -1057,7 +1077,39 @@ class session
 	*/
 	function set_cookie($name, $cookiedata, $cookietime, $httponly = true)
 	{
-		global $config;
+		global $config, $phpbb_dispatcher;
+
+		// If headers are already set, we just return
+		if (headers_sent())
+		{
+			return;
+		}
+
+		$disable_cookie = false;
+		/**
+		* Event to modify or disable setting cookies
+		*
+		* @event core.set_cookie
+		* @var	bool		disable_cookie	Set to true to disable setting this cookie
+		* @var	string		name			Name of the cookie
+		* @var	string		cookiedata		The data to hold within the cookie
+		* @var	int			cookietime		The expiration time as UNIX timestamp
+		* @var	bool		httponly		Use HttpOnly?
+		* @since 3.2.9-RC1
+		*/
+		$vars = array(
+			'disable_cookie',
+			'name',
+			'cookiedata',
+			'cookietime',
+			'httponly',
+		);
+		extract($phpbb_dispatcher->trigger_event('core.set_cookie', compact($vars)));
+
+		if ($disable_cookie)
+		{
+			return;
+		}
 
 		$name_data = rawurlencode($config['cookie_name'] . '_' . $name) . '=' . rawurlencode($cookiedata);
 		$expire = gmdate('D, d-M-Y H:i:s \\G\\M\\T', $cookietime);
@@ -1130,7 +1182,7 @@ class session
 			$where_sql[] = $_sql;
 		}
 
-		$sql .= (sizeof($where_sql)) ? implode(' AND ', $where_sql) : '';
+		$sql .= (count($where_sql)) ? implode(' AND ', $where_sql) : '';
 		$result = $db->sql_query($sql, $cache_ttl);
 
 		$ban_triggered_by = 'user';
@@ -1210,7 +1262,7 @@ class session
 
 		if ($banned && !$return)
 		{
-			global $template, $phpbb_root_path, $phpEx;
+			global $phpbb_root_path, $phpEx;
 
 			// If the session is empty we need to create a valid one...
 			if (empty($this->session_id))
@@ -1273,7 +1325,12 @@ class session
 			trigger_error($message);
 		}
 
-		return ($banned && $ban_row['ban_give_reason']) ? $ban_row['ban_give_reason'] : $banned;
+		if (!empty($ban_row))
+		{
+			$ban_row['ban_triggered_by'] = $ban_triggered_by;
+		}
+
+		return ($banned && $ban_row) ? $ban_row : $banned;
 	}
 
 	/**
@@ -1409,7 +1466,7 @@ class session
 	*/
 	function set_login_key($user_id = false, $key = false, $user_ip = false)
 	{
-		global $config, $db;
+		global $db;
 
 		$user_id = ($user_id === false) ? $this->data['user_id'] : $user_id;
 		$user_ip = ($user_ip === false) ? $this->ip : $user_ip;
@@ -1419,7 +1476,7 @@ class session
 
 		$sql_ary = array(
 			'key_id'		=> (string) md5($key_id),
-			'last_ip'		=> (string) $this->ip,
+			'last_ip'		=> (string) $user_ip,
 			'last_login'	=> (int) time()
 		);
 
@@ -1456,7 +1513,7 @@ class session
 	*/
 	function reset_login_keys($user_id = false)
 	{
-		global $config, $db;
+		global $db;
 
 		$user_id = ($user_id === false) ? (int) $this->data['user_id'] : (int) $user_id;
 
@@ -1588,13 +1645,15 @@ class session
 			return;
 		}
 
+		// Do not update the session page for ajax requests, so the view online still works as intended
+		$page_changed = $this->update_session_page && $this->data['session_page'] != $this->page['page'] && !$request->is_ajax();
+
 		// Only update session DB a minute or so after last update or if page changes
-		if ($this->time_now - ((isset($this->data['session_time'])) ? $this->data['session_time'] : 0) > 60 || ($this->update_session_page && $this->data['session_page'] != $this->page['page']))
+		if ($this->time_now - (isset($this->data['session_time']) ? $this->data['session_time'] : 0) > 60 || $page_changed)
 		{
 			$sql_ary = array('session_time' => $this->time_now);
 
-			// Do not update the session page for ajax requests, so the view online still works as intended
-			if ($this->update_session_page && !$request->is_ajax())
+			if ($page_changed)
 			{
 				$sql_ary['session_page'] = substr($this->page['page'], 0, 199);
 				$sql_ary['session_forum_id'] = $this->page['forum'];
diff --git a/phpBB/phpbb/template/asset.php b/phpBB/phpbb/template/asset.php
index ff9366af4a..cb00f16549 100644
--- a/phpBB/phpbb/template/asset.php
+++ b/phpBB/phpbb/template/asset.php
@@ -20,15 +20,20 @@ class asset
 	/** @var \phpbb\path_helper **/
 	protected $path_helper;
 
+	/** @var \phpbb\filesystem\filesystem */
+	protected $filesystem;
+
 	/**
 	* Constructor
 	*
 	* @param string $url URL
 	* @param \phpbb\path_helper $path_helper Path helper object
+	* @param \phpbb\filesystem\filesystem $filesystem
 	*/
-	public function __construct($url, \phpbb\path_helper $path_helper)
+	public function __construct($url, \phpbb\path_helper $path_helper, \phpbb\filesystem\filesystem $filesystem)
 	{
 		$this->path_helper = $path_helper;
+		$this->filesystem = $filesystem;
 
 		$this->set_url($url);
 	}
@@ -152,18 +157,18 @@ class asset
 	*/
 	public function set_path($path, $urlencode = false)
 	{
-		// Since 1.7.0 Twig returns the real path of the file. We need it to be relative to the working directory.
-		$real_root_path = realpath($this->path_helper->get_phpbb_root_path()) . DIRECTORY_SEPARATOR;
+		// Since 1.7.0 Twig returns the real path of the file. We need it to be relative.
+		$real_root_path = $this->filesystem->realpath($this->path_helper->get_phpbb_root_path()) . DIRECTORY_SEPARATOR;
 
 		// If the asset is under the phpBB root path we need to remove its path and then prepend $phpbb_root_path
-		if (substr($path . DIRECTORY_SEPARATOR, 0, strlen($real_root_path)) === $real_root_path)
+		if ($real_root_path && substr($path . DIRECTORY_SEPARATOR, 0, strlen($real_root_path)) === $real_root_path)
 		{
 			$path = $this->path_helper->get_phpbb_root_path() . str_replace('\\', '/', substr($path, strlen($real_root_path)));
 		}
 		else
 		{
 			// Else we make the path relative to the current working directory
-			$real_root_path = realpath('.') . DIRECTORY_SEPARATOR;
+			$real_root_path = $this->filesystem->realpath('.') . DIRECTORY_SEPARATOR;
 			if ($real_root_path && substr($path . DIRECTORY_SEPARATOR, 0, strlen($real_root_path)) === $real_root_path)
 			{
 				$path = str_replace('\\', '/', substr($path, strlen($real_root_path)));
diff --git a/phpBB/phpbb/template/assets_bag.php b/phpBB/phpbb/template/assets_bag.php
new file mode 100644
index 0000000000..067b0eb8f1
--- /dev/null
+++ b/phpBB/phpbb/template/assets_bag.php
@@ -0,0 +1,95 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\template;
+
+class assets_bag
+{
+	/** @var asset[] */
+	protected $stylesheets = [];
+
+	/** @var asset[] */
+	protected $scripts = [];
+
+	/**
+	 * Add a css asset to the bag
+	 *
+	 * @param asset $asset
+	 */
+	public function add_stylesheet(asset $asset)
+	{
+		$this->stylesheets[] = $asset;
+	}
+
+	/**
+	 * Add a js script asset to the bag
+	 *
+	 * @param asset $asset
+	 */
+	public function add_script(asset $asset)
+	{
+		$this->scripts[] = $asset;
+	}
+
+	/**
+	 * Returns all css assets
+	 *
+	 * @return asset[]
+	 */
+	public function get_stylesheets()
+	{
+		return $this->stylesheets;
+	}
+
+	/**
+	 * Returns all js assets
+	 *
+	 * @return asset[]
+	 */
+	public function get_scripts()
+	{
+		return $this->scripts;
+	}
+
+	/**
+	 * Returns the HTML code to includes all css assets
+	 *
+	 * @return string
+	 */
+	public function get_stylesheets_content()
+	{
+		$output = '';
+		foreach ($this->stylesheets as $stylesheet)
+		{
+			$output .= "<link href=\"{$stylesheet->get_url()}\" rel=\"stylesheet\" media=\"screen\" />\n";
+		}
+
+		return $output;
+	}
+
+	/**
+	 * Returns the HTML code to includes all js assets
+	 *
+	 * @return string
+	 */
+	public function get_scripts_content()
+	{
+		$output = '';
+		foreach ($this->scripts as $script)
+		{
+			$output .= "<script src=\"{$script->get_url()}\"></script>\n";
+		}
+
+		return $output;
+	}
+}
diff --git a/phpBB/phpbb/template/base.php b/phpBB/phpbb/template/base.php
index 41c0a01ba8..d502aceab8 100644
--- a/phpBB/phpbb/template/base.php
+++ b/phpBB/phpbb/template/base.php
@@ -107,6 +107,27 @@ abstract class base implements template
 	/**
 	* {@inheritdoc}
 	*/
+	public function retrieve_vars(array $vararray)
+	{
+		$result = array();
+		foreach ($vararray as $varname)
+		{
+			$result[$varname] = $this->retrieve_var($varname);
+		}
+		return $result;
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function retrieve_var($varname)
+	{
+		return $this->context->retrieve_var($varname);
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
 	public function assign_block_vars($blockname, array $vararray)
 	{
 		$this->context->assign_block_vars($blockname, $vararray);
@@ -127,6 +148,14 @@ abstract class base implements template
 	/**
 	* {@inheritdoc}
 	*/
+	public function retrieve_block_vars($blockname, array $vararray)
+	{
+		return $this->context->retrieve_block_vars($blockname, $vararray);
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
 	public function alter_block_array($blockname, array $vararray, $key = false, $mode = 'insert')
 	{
 		return $this->context->alter_block_array($blockname, $vararray, $key, $mode);
diff --git a/phpBB/phpbb/template/context.php b/phpBB/phpbb/template/context.php
index 5d04a09865..202e29ce00 100644
--- a/phpBB/phpbb/template/context.php
+++ b/phpBB/phpbb/template/context.php
@@ -87,6 +87,17 @@ class context
 	}
 
 	/**
+	* Retreive a single scalar value from a single key.
+	*
+	* @param string $varname Variable name
+	* @return mixed Variable value, or null if not set
+	*/
+	public function retrieve_var($varname)
+	{
+		return isset($this->rootref[$varname]) ? $this->rootref[$varname] : null;
+	}
+
+	/**
 	* Returns a reference to template data array.
 	*
 	* This function is public so that template renderer may invoke it.
@@ -131,7 +142,7 @@ class context
 	*/
 	protected function set_num_rows(&$loop_data)
 	{
-		$s_num_rows = sizeof($loop_data);
+		$s_num_rows = count($loop_data);
 		foreach ($loop_data as &$mod_block)
 		{
 			foreach ($mod_block as $sub_block_name => &$sub_block)
@@ -179,70 +190,51 @@ class context
 	public function assign_block_vars($blockname, array $vararray)
 	{
 		$this->num_rows_is_set = false;
-		if (strpos($blockname, '.') !== false)
-		{
-			// Nested block.
-			$blocks = explode('.', $blockname);
-			$blockcount = sizeof($blocks) - 1;
-
-			$str = &$this->tpldata;
-			for ($i = 0; $i < $blockcount; $i++)
-			{
-				$str = &$str[$blocks[$i]];
-				$str = &$str[sizeof($str) - 1];
-			}
 
-			$s_row_count = isset($str[$blocks[$blockcount]]) ? sizeof($str[$blocks[$blockcount]]) : 0;
-			$vararray['S_ROW_COUNT'] = $vararray['S_ROW_NUM'] = $s_row_count;
+		// For nested block, $blockcount > 0, for top-level block, $blockcount == 0
+		$blocks = explode('.', $blockname);
+		$blockcount = count($blocks) - 1;
 
-			// Assign S_FIRST_ROW
-			if (!$s_row_count)
-			{
-				$vararray['S_FIRST_ROW'] = true;
-			}
+		$block = &$this->tpldata;
+		for ($i = 0; $i < $blockcount; $i++)
+		{
+			$pos = strpos($blocks[$i], '[');
+			$name = ($pos !== false) ? substr($blocks[$i], 0, $pos) : $blocks[$i];
+			$block = &$block[$name];
+			$block_count = empty($block) ? 0 : count($block) - 1;
+			$index = (!$pos || strpos($blocks[$i], '[]') === $pos) ? $block_count : (min((int) substr($blocks[$i], $pos + 1, -1), $block_count));
+			$block = &$block[$index];
+		}
 
-			// Assign S_BLOCK_NAME
-			$vararray['S_BLOCK_NAME'] = $blocks[$blockcount];
+		// $block = &$block[$blocks[$i]]; // Do not traverse the last block as it might be empty
+		$name = $blocks[$i];
 
-			// Now the tricky part, we always assign S_LAST_ROW and remove the entry before
-			// This is much more clever than going through the complete template data on display (phew)
-			$vararray['S_LAST_ROW'] = true;
-			if ($s_row_count > 0)
-			{
-				unset($str[$blocks[$blockcount]][($s_row_count - 1)]['S_LAST_ROW']);
-			}
+		// Assign S_ROW_COUNT and S_ROW_NUM
+		$s_row_count = isset($block[$name]) ? count($block[$name]) : 0;
+		$vararray['S_ROW_COUNT'] = $vararray['S_ROW_NUM'] = $s_row_count;
 
-			// Now we add the block that we're actually assigning to.
-			// We're adding a new iteration to this block with the given
-			// variable assignments.
-			$str[$blocks[$blockcount]][] = $vararray;
-		}
-		else
+		// Assign S_FIRST_ROW
+		if (!$s_row_count)
 		{
-			// Top-level block.
-			$s_row_count = (isset($this->tpldata[$blockname])) ? sizeof($this->tpldata[$blockname]) : 0;
-			$vararray['S_ROW_COUNT'] = $vararray['S_ROW_NUM'] = $s_row_count;
-
-			// Assign S_FIRST_ROW
-			if (!$s_row_count)
-			{
-				$vararray['S_FIRST_ROW'] = true;
-			}
+			$vararray['S_FIRST_ROW'] = true;
+		}
 
-			// Assign S_BLOCK_NAME
-			$vararray['S_BLOCK_NAME'] = $blockname;
+		// Assign S_BLOCK_NAME
+		$vararray['S_BLOCK_NAME'] = $name;
 
-			// We always assign S_LAST_ROW and remove the entry before
-			$vararray['S_LAST_ROW'] = true;
-			if ($s_row_count > 0)
-			{
-				unset($this->tpldata[$blockname][($s_row_count - 1)]['S_LAST_ROW']);
-			}
-
-			// Add a new iteration to this block with the variable assignments we were given.
-			$this->tpldata[$blockname][] = $vararray;
+		// Now the tricky part, we always assign S_LAST_ROW and remove the entry before
+		// This is much more clever than going through the complete template data on display (phew)
+		$vararray['S_LAST_ROW'] = true;
+		if ($s_row_count > 0)
+		{
+			unset($block[$name][($s_row_count - 1)]['S_LAST_ROW']);
 		}
 
+		// Now we add the block that we're actually assigning to.
+		// We're adding a new iteration to this block with the given
+		// variable assignments.
+		$block[$name][] = $vararray;
+
 		return true;
 	}
 
@@ -264,57 +256,116 @@ class context
 	}
 
 	/**
-	* Find the index for a specified key in the innermost specified block
-	*
-	* @param	string	$blockname	the blockname, for example 'loop'
-	* @param	mixed	$key		Key to search for
-	*
-	* array: KEY => VALUE [the key/value pair to search for within the loop to determine the correct position]
-	*
-	* int: Position [the position to search for]
+	* Retrieve key variable pairs from the specified block
 	*
-	* If key is false the position is set to 0
-	* If key is true the position is set to the last entry
-	*
-	* @return mixed false if not found, index position otherwise; be sure to test with ===
+	* @param string $blockname Name of block to retrieve $vararray from
+	* @param array $vararray An array of variable names, empty array retrieves all vars
+	* @return array of hashes with variable name as key and retrieved value or null as value
 	*/
-	public function find_key_index($blockname, $key)
+	public function retrieve_block_vars($blockname, array $vararray)
 	{
 		// For nested block, $blockcount > 0, for top-level block, $blockcount == 0
 		$blocks = explode('.', $blockname);
-		$blockcount = sizeof($blocks) - 1;
+		$blockcount = count($blocks) - 1;
 
 		$block = $this->tpldata;
-		for ($i = 0; $i < $blockcount; $i++)
+		for ($i = 0; $i <= $blockcount; $i++)
 		{
 			if (($pos = strpos($blocks[$i], '[')) !== false)
 			{
 				$name = substr($blocks[$i], 0, $pos);
 
+				if (empty($block[$name]))
+				{
+					return array();
+				}
+
 				if (strpos($blocks[$i], '[]') === $pos)
 				{
-					$index = sizeof($block[$name]) - 1;
+					$index = count($block[$name]) - 1;
 				}
 				else
 				{
-					$index = min((int) substr($blocks[$i], $pos + 1, -1), sizeof($block[$name]) - 1);
+					$index = min((int) substr($blocks[$i], $pos + 1, -1), count($block[$name]) - 1);
 				}
 			}
 			else
 			{
 				$name = $blocks[$i];
-				$index = sizeof($block[$name]) - 1;
+				if (empty($block[$name]))
+				{
+					return array();
+				}
+
+				$index = count($block[$name]) - 1;
 			}
+			$block = $block[$name];
+			$block = $block[$index];
+		}
+
+		$result = array();
+		if ($vararray === array())
+		{
+			// The calculated vars that depend on the block position are excluded from the complete block returned results
+			$excluded_vars = array('S_FIRST_ROW', 'S_LAST_ROW', 'S_BLOCK_NAME', 'S_NUM_ROWS', 'S_ROW_COUNT', 'S_ROW_NUM');
+
+			foreach ($block as $varname => $varvalue)
+			{
+				if ($varname === strtoupper($varname) && !is_array($varvalue) && !in_array($varname, $excluded_vars))
+				{
+					$result[$varname] = $varvalue;
+				}
+			}
+		}
+		else
+		{
+			foreach ($vararray as $varname)
+			{
+				$result[$varname] = isset($block[$varname]) ? $block[$varname] : null;
+			}
+		}
+		return $result;
+	}
+
+	/**
+	* Find the index for a specified key in the innermost specified block
+	*
+	* @param	string	$blockname	the blockname, for example 'loop'
+	* @param	mixed	$key		Key to search for
+	*
+	* array: KEY => VALUE [the key/value pair to search for within the loop to determine the correct position]
+	*
+	* int: Position [the position to search for]
+	*
+	* If key is false the position is set to 0
+	* If key is true the position is set to the last entry
+	*
+	* @return mixed false if not found, index position otherwise; be sure to test with ===
+	*/
+	public function find_key_index($blockname, $key)
+	{
+		// For nested block, $blockcount > 0, for top-level block, $blockcount == 0
+		$blocks = explode('.', $blockname);
+		$blockcount = count($blocks) - 1;
+
+		$block = $this->tpldata;
+		for ($i = 0; $i < $blockcount; $i++)
+		{
+			$pos = strpos($blocks[$i], '[');
+			$name = ($pos !== false) ? substr($blocks[$i], 0, $pos) : $blocks[$i];
+
 			if (!isset($block[$name]))
 			{
 				return false;
 			}
-			$block = $block[$name];
-			if (!isset($block[$index]))
+
+			$index = (!$pos || strpos($blocks[$i], '[]') === $pos) ? (count($block[$name]) - 1) : (min((int) substr($blocks[$i], $pos + 1, -1), count($block[$name]) - 1));
+
+			if (!isset($block[$name][$index]))
 			{
 				return false;
 			}
-			$block = $block[$index];
+			$block = $block[$name][$index];
 		}
 
 		if (!isset($block[$blocks[$i]]))
@@ -324,9 +375,9 @@ class context
 		$block = $block[$blocks[$i]]; // Traverse the last block
 
 		// Change key to zero (change first position) if false and to last position if true
-		if ($key === false || $key === true)
+		if (is_bool($key))
 		{
-			return ($key === false) ? 0 : sizeof($block) - 1;
+			return (!$key) ? 0 : count($block) - 1;
 		}
 
 		// Get correct position if array given
@@ -343,7 +394,7 @@ class context
 			}
 		}
 
-		return (is_int($key) && ((0 <= $key) && ($key < sizeof($block)))) ? $key : false;
+		return (is_int($key) && ((0 <= $key) && ($key < count($block)))) ? $key : false;
 	}
 
 	/**
@@ -363,10 +414,11 @@ class context
 	* If key is false the position is set to 0
 	* If key is true the position is set to the last entry
 	*
-	* @param	string	$mode		Mode to execute (valid modes are 'insert' and 'change')
+	* @param	string	$mode		Mode to execute (valid modes are 'insert', 'change' and 'delete')
 	*
 	*	If insert, the vararray is inserted at the given position (position counting from zero).
 	*	If change, the current block gets merged with the vararray (resulting in new key/value pairs be added and existing keys be replaced by the new \value).
+	*	If delete, the vararray is ignored, and the block at the given position (counting from zero) is removed.
 	*
 	* Since counting begins by zero, inserting at the last position will result in this array: array(vararray, last positioned array)
 	* and inserting at position 1 will result in this array: array(first positioned array, vararray, following vars)
@@ -379,7 +431,7 @@ class context
 
 		// For nested block, $blockcount > 0, for top-level block, $blockcount == 0
 		$blocks = explode('.', $blockname);
-		$blockcount = sizeof($blocks) - 1;
+		$blockcount = count($blocks) - 1;
 
 		$block = &$this->tpldata;
 		for ($i = 0; $i < $blockcount; $i++)
@@ -390,17 +442,17 @@ class context
 
 				if (strpos($blocks[$i], '[]') === $pos)
 				{
-					$index = sizeof($block[$name]) - 1;
+					$index = count($block[$name]) - 1;
 				}
 				else
 				{
-					$index = min((int) substr($blocks[$i], $pos + 1, -1), sizeof($block[$name]) - 1);
+					$index = min((int) substr($blocks[$i], $pos + 1, -1), count($block[$name]) - 1);
 				}
 			}
 			else
 			{
 				$name = $blocks[$i];
-				$index = sizeof($block[$name]) - 1;
+				$index = count($block[$name]) - 1;
 			}
 			$block = &$block[$name];
 			$block = &$block[$index];
@@ -422,7 +474,7 @@ class context
 		// Change key to zero (change first position) if false and to last position if true
 		if ($key === false || $key === true)
 		{
-			$key = ($key === false) ? 0 : sizeof($block);
+			$key = ($key === false) ? 0 : count($block);
 		}
 
 		// Get correct position if array given
@@ -452,9 +504,9 @@ class context
 		if ($mode == 'insert')
 		{
 			// Make sure we are not exceeding the last iteration
-			if ($key >= sizeof($block))
+			if ($key >= count($block))
 			{
-				$key = sizeof($block);
+				$key = count($block);
 				unset($block[($key - 1)]['S_LAST_ROW']);
 				$vararray['S_LAST_ROW'] = true;
 			}
@@ -469,7 +521,7 @@ class context
 			$vararray['S_BLOCK_NAME'] = $name;
 
 			// Re-position template blocks
-			for ($i = sizeof($block); $i > $key; $i--)
+			for ($i = count($block); $i > $key; $i--)
 			{
 				$block[$i] = $block[$i-1];
 
@@ -487,12 +539,12 @@ class context
 		if ($mode == 'change')
 		{
 			// If key is out of bounds, do not change anything
-			if ($key > sizeof($block) || $key < 0)
+			if ($key > count($block) || $key < 0)
 			{
 				return false;
 			}
 
-			if ($key == sizeof($block))
+			if ($key == count($block))
 			{
 				$key--;
 			}
@@ -502,6 +554,45 @@ class context
 			return true;
 		}
 
+		// Delete Block
+		if ($mode == 'delete')
+		{
+			// If we are exceeding last iteration, do not delete anything
+			if ($key > count($block) || $key < 0)
+			{
+				return false;
+			}
+
+			// If we are positioned at the end, we remove the last element
+			if ($key == count($block))
+			{
+				$key--;
+			}
+
+			// We are deleting the last element in the block, so remove the block
+			if (count($block) === 1)
+			{
+				$block = null; // unset($block); does not work on references
+				return true;
+			}
+
+			// Re-position template blocks
+			for ($i = $key; $i < count($block)-1; $i++)
+			{
+				$block[$i] = $block[$i+1];
+				$block[$i]['S_ROW_COUNT'] = $block[$i]['S_ROW_NUM'] = $i;
+			}
+
+			// Remove the last element
+			unset($block[$i]);
+
+			// Set first and last elements again, in case they were removed
+			$block[0]['S_FIRST_ROW'] = true;
+			$block[count($block)-1]['S_LAST_ROW'] = true;
+
+			return true;
+		}
+
 		return false;
 	}
 
@@ -518,13 +609,13 @@ class context
 		{
 			// Nested block.
 			$blocks = explode('.', $blockname);
-			$blockcount = sizeof($blocks) - 1;
+			$blockcount = count($blocks) - 1;
 
 			$str = &$this->tpldata;
 			for ($i = 0; $i < $blockcount; $i++)
 			{
 				$str = &$str[$blocks[$i]];
-				$str = &$str[sizeof($str) - 1];
+				$str = &$str[count($str) - 1];
 			}
 
 			unset($str[$blocks[$blockcount]]);
diff --git a/phpBB/phpbb/template/exception/user_object_not_available.php b/phpBB/phpbb/template/exception/user_object_not_available.php
new file mode 100644
index 0000000000..62fd2743c1
--- /dev/null
+++ b/phpBB/phpbb/template/exception/user_object_not_available.php
@@ -0,0 +1,22 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\template\exception;
+
+/**
+ * This exception is thrown when the user object was not set but it is required by the called method
+ */
+class user_object_not_available extends \phpbb\exception\runtime_exception
+{
+
+}
diff --git a/phpBB/phpbb/template/template.php b/phpBB/phpbb/template/template.php
index 9e3d658ca8..df83d5bc43 100644
--- a/phpBB/phpbb/template/template.php
+++ b/phpBB/phpbb/template/template.php
@@ -128,6 +128,22 @@ interface template
 	public function append_var($varname, $varval);
 
 	/**
+	* Retrieve multiple template values
+	*
+	* @param array $vararray An array with variable names
+	* @return array A hash of variable name => value pairs (value is null if not set)
+	*/
+	public function retrieve_vars(array $vararray);
+
+	/**
+	* Retreive a single scalar value from a single key.
+	*
+	* @param string $varname Variable name
+	* @return mixed Variable value, or null if not set
+	*/
+	public function retrieve_var($varname);
+
+	/**
 	* Assign key variable pairs from an array to a specified block
 	* @param string $blockname Name of block to assign $vararray to
 	* @param array $vararray A hash of variable name => value pairs
@@ -144,6 +160,14 @@ interface template
 	public function assign_block_vars_array($blockname, array $block_vars_array);
 
 	/**
+	* Retrieve variable values from an specified block
+	* @param string $blockname Name of block to retrieve $vararray from
+	* @param array $vararray An array with variable names, empty array gets all vars
+	* @return array A hash of variable name => value pairs (value is null if not set)
+	*/
+	public function retrieve_block_vars($blockname, array $vararray);
+
+	/**
 	* Change already assigned key variable pair (one-dimensional - single loop entry)
 	*
 	* An example of how to use this function:
@@ -160,10 +184,11 @@ interface template
 	* If key is false the position is set to 0
 	* If key is true the position is set to the last entry
 	*
-	* @param	string	$mode		Mode to execute (valid modes are 'insert' and 'change')
+	* @param	string	$mode		Mode to execute (valid modes are 'insert', 'change' and 'delete')
 	*
 	*	If insert, the vararray is inserted at the given position (position counting from zero).
 	*	If change, the current block gets merged with the vararray (resulting in new \key/value pairs be added and existing keys be replaced by the new \value).
+	*	If delete, the vararray is ignored, and the block at the given position (counting from zero) is removed.
 	*
 	* Since counting begins by zero, inserting at the last position will result in this array: array(vararray, last positioned array)
 	* and inserting at position 1 will result in this array: array(first positioned array, vararray, following vars)
diff --git a/phpBB/phpbb/template/twig/environment.php b/phpBB/phpbb/template/twig/environment.php
index 476ffd935e..ac4b16e457 100644
--- a/phpBB/phpbb/template/twig/environment.php
+++ b/phpBB/phpbb/template/twig/environment.php
@@ -13,17 +13,28 @@
 
 namespace phpbb\template\twig;
 
+use phpbb\template\assets_bag;
+
 class environment extends \Twig_Environment
 {
 	/** @var \phpbb\config\config */
 	protected $phpbb_config;
 
+	/** @var \phpbb\filesystem\filesystem */
+	protected $filesystem;
+
 	/** @var \phpbb\path_helper */
 	protected $phpbb_path_helper;
 
+	/** @var \Symfony\Component\DependencyInjection\ContainerInterface */
+	protected $container;
+
 	/** @var \phpbb\extension\manager */
 	protected $extension_manager;
 
+	/** @var \phpbb\event\dispatcher_interface */
+	protected $phpbb_dispatcher;
+
 	/** @var string */
 	protected $phpbb_root_path;
 
@@ -33,26 +44,43 @@ class environment extends \Twig_Environment
 	/** @var array **/
 	protected $namespace_look_up_order = array('__main__');
 
+	/** @var assets_bag */
+	protected $assets_bag;
+
 	/**
 	* Constructor
 	*
 	* @param \phpbb\config\config $phpbb_config The phpBB configuration
+	* @param \phpbb\filesystem\filesystem $filesystem
 	* @param \phpbb\path_helper $path_helper phpBB path helper
+	* @param string $cache_path The path to the cache directory
 	* @param \phpbb\extension\manager $extension_manager phpBB extension manager
 	* @param \Twig_LoaderInterface $loader Twig loader interface
+	* @param \phpbb\event\dispatcher_interface	$phpbb_dispatcher	Event dispatcher object
 	* @param array $options Array of options to pass to Twig
 	*/
-	public function __construct($phpbb_config, \phpbb\path_helper $path_helper, \phpbb\extension\manager $extension_manager = null, \Twig_LoaderInterface $loader = null, $options = array())
+	public function __construct(\phpbb\config\config $phpbb_config, \phpbb\filesystem\filesystem $filesystem, \phpbb\path_helper $path_helper, $cache_path, \phpbb\extension\manager $extension_manager = null, \Twig_LoaderInterface $loader = null, \phpbb\event\dispatcher_interface $phpbb_dispatcher = null, $options = array())
 	{
 		$this->phpbb_config = $phpbb_config;
 
+		$this->filesystem = $filesystem;
 		$this->phpbb_path_helper = $path_helper;
 		$this->extension_manager = $extension_manager;
+		$this->phpbb_dispatcher = $phpbb_dispatcher;
 
 		$this->phpbb_root_path = $this->phpbb_path_helper->get_phpbb_root_path();
 		$this->web_root_path = $this->phpbb_path_helper->get_web_root_path();
 
-		return parent::__construct($loader, $options);
+		$this->assets_bag = new assets_bag();
+
+		$options = array_merge(array(
+			'cache'			=> (defined('IN_INSTALL')) ? false : $cache_path,
+			'debug'			=> false,
+			'auto_reload'	=> (bool) $this->phpbb_config['load_tplcompile'],
+			'autoescape'	=> false,
+		), $options);
+
+		parent::__construct($loader, $options);
 	}
 
 	/**
@@ -78,16 +106,26 @@ class environment extends \Twig_Environment
 	}
 
 	/**
-	* Get the phpBB root path
-	*
-	* @return string
-	*/
+	 * Get the phpBB root path
+	 *
+	 * @return string
+	 */
 	public function get_phpbb_root_path()
 	{
 		return $this->phpbb_root_path;
 	}
 
 	/**
+	* Get the filesystem object
+	*
+	* @return \phpbb\filesystem\filesystem
+	*/
+	public function get_filesystem()
+	{
+		return $this->filesystem;
+	}
+
+	/**
 	* Get the web root path
 	*
 	* @return string
@@ -108,6 +146,16 @@ class environment extends \Twig_Environment
 	}
 
 	/**
+	 * Gets the assets bag
+	 *
+	 * @return assets_bag
+	 */
+	public function get_assets_bag()
+	{
+		return $this->assets_bag;
+	}
+
+	/**
 	* Get the namespace look up order
 	*
 	* @return array
@@ -131,6 +179,84 @@ class environment extends \Twig_Environment
 	}
 
 	/**
+	 * {@inheritdoc}
+	 */
+	public function render($name, array $context = [])
+	{
+		return $this->display_with_assets($name, $context);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function display($name, array $context = [])
+	{
+		echo $this->display_with_assets($name, $context);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	private function display_with_assets($name, array $context = [])
+	{
+		$placeholder_salt = unique_id();
+
+		if (array_key_exists('definition', $context))
+		{
+			$context['definition']->set('SCRIPTS', '__SCRIPTS_' . $placeholder_salt . '__');
+			$context['definition']->set('STYLESHEETS', '__STYLESHEETS_' . $placeholder_salt . '__');
+		}
+
+		/**
+		* Allow changing the template output stream before rendering
+		*
+		* @event core.twig_environment_render_template_before
+		* @var	array	context		Array with template variables
+		* @var	string  name		The template name
+		* @since 3.2.1-RC1
+		*/
+		if ($this->phpbb_dispatcher)
+		{
+			$vars = array('context', 'name');
+			extract($this->phpbb_dispatcher->trigger_event('core.twig_environment_render_template_before', compact($vars)));
+		}
+
+		$output = parent::render($name, $context);
+
+		/**
+		* Allow changing the template output stream after rendering
+		*
+		* @event core.twig_environment_render_template_after
+		* @var	array	context		Array with template variables
+		* @var	string  name		The template name
+		* @var	string	output		Rendered template output stream
+		* @since 3.2.1-RC1
+		*/
+		if ($this->phpbb_dispatcher)
+		{
+			$vars = array('context', 'name', 'output');
+			extract($this->phpbb_dispatcher->trigger_event('core.twig_environment_render_template_after', compact($vars)));
+		}
+
+		return $this->inject_assets($output, $placeholder_salt);
+	}
+
+	/**
+	 * Injects the assets (from INCLUDECSS/JS) in the output.
+	 *
+	 * @param string $output
+	 *
+	 * @return string
+	 */
+	private function inject_assets($output, $placeholder_salt)
+	{
+		$output = str_replace('__STYLESHEETS_' . $placeholder_salt . '__', $this->assets_bag->get_stylesheets_content(), $output);
+		$output = str_replace('__SCRIPTS_' . $placeholder_salt . '__', $this->assets_bag->get_scripts_content(), $output);
+
+		return $output;
+	}
+
+	/**
 	* Loads a template by name.
 	*
 	* @param string  $name  The template name
diff --git a/phpBB/phpbb/template/twig/extension.php b/phpBB/phpbb/template/twig/extension.php
index d5b14129b5..f6f8e03ca2 100644
--- a/phpBB/phpbb/template/twig/extension.php
+++ b/phpBB/phpbb/template/twig/extension.php
@@ -18,20 +18,20 @@ class extension extends \Twig_Extension
 	/** @var \phpbb\template\context */
 	protected $context;
 
-	/** @var \phpbb\user */
-	protected $user;
+	/** @var \phpbb\language\language */
+	protected $language;
 
 	/**
 	* Constructor
 	*
 	* @param \phpbb\template\context $context
-	* @param \phpbb\user $user
+	* @param \phpbb\language\language $language
 	* @return \phpbb\template\twig\extension
 	*/
-	public function __construct(\phpbb\template\context $context, $user)
+	public function __construct(\phpbb\template\context $context, $language)
 	{
 		$this->context = $context;
-		$this->user = $user;
+		$this->language = $language;
 	}
 
 	/**
@@ -71,6 +71,7 @@ class extension extends \Twig_Extension
 	{
 		return array(
 			new \Twig_SimpleFilter('subset', array($this, 'loop_subset'), array('needs_environment' => true)),
+			// @deprecated 3.2.0 Uses twig's JS escape method instead of addslashes
 			new \Twig_SimpleFilter('addslashes', 'addslashes'),
 		);
 	}
@@ -145,7 +146,7 @@ class extension extends \Twig_Extension
 			//  of items to grab (length)
 
 			// Start must always be the actual starting number for this calculation (not negative)
-			$start = ($start < 0) ? sizeof($item) + $start : $start;
+			$start = ($start < 0) ? count($item) + $start : $start;
 			$end = $end - $start;
 		}
 
@@ -171,14 +172,14 @@ class extension extends \Twig_Extension
 
 		$context_vars = $this->context->get_root_ref();
 
-		if (isset($context_vars['L_' . $key]))
+		if (is_string($key) && isset($context_vars['L_' . $key]))
 		{
 			return $context_vars['L_' . $key];
 		}
 
-		// LA_ is transformed into lang(\'$1\')|addslashes, so we should not
+		// LA_ is transformed into lang(\'$1\')|escape('js'), so we should not
 		// need to check for it
 
-		return call_user_func_array(array($this->user, 'lang'), $args);
+		return call_user_func_array(array($this->language, 'lang'), $args);
 	}
 }
diff --git a/phpBB/phpbb/template/twig/extension/routing.php b/phpBB/phpbb/template/twig/extension/routing.php
new file mode 100644
index 0000000000..829ce738eb
--- /dev/null
+++ b/phpBB/phpbb/template/twig/extension/routing.php
@@ -0,0 +1,43 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\template\twig\extension;
+
+use Symfony\Bridge\Twig\Extension\RoutingExtension;
+use Symfony\Component\Routing\Generator\UrlGeneratorInterface;
+
+class routing extends RoutingExtension
+{
+	/** @var \phpbb\controller\helper */
+	protected $helper;
+
+	/**
+	* Constructor
+	*
+	* @param \phpbb\routing\helper $helper
+	*/
+	public function __construct(\phpbb\routing\helper $helper)
+	{
+		$this->helper = $helper;
+	}
+
+	public function getPath($name, $parameters = array(), $relative = false)
+	{
+		return $this->helper->route($name, $parameters, true, false, $relative ? UrlGeneratorInterface::RELATIVE_PATH : UrlGeneratorInterface::ABSOLUTE_PATH);
+	}
+
+	public function getUrl($name, $parameters = array(), $schemeRelative = false)
+	{
+		return $this->helper->route($name, $parameters, true, false, $schemeRelative ? UrlGeneratorInterface::NETWORK_PATH : UrlGeneratorInterface::ABSOLUTE_URL);
+	}
+}
diff --git a/phpBB/phpbb/template/twig/lexer.php b/phpBB/phpbb/template/twig/lexer.php
index c5dc7273ba..d0bcfa615e 100644
--- a/phpBB/phpbb/template/twig/lexer.php
+++ b/phpBB/phpbb/template/twig/lexer.php
@@ -15,8 +15,21 @@ namespace phpbb\template\twig;
 
 class lexer extends \Twig_Lexer
 {
+	public function set_environment(\Twig_Environment $env)
+	{
+		$this->env = $env;
+	}
+
 	public function tokenize($code, $filename = null)
 	{
+		// Handle \Twig_Source format input
+		if ($code instanceof \Twig_Source)
+		{
+			$source = $code;
+			$code = $source->getCode();
+			$filename = $source->getName();
+		}
+
 		// Our phpBB tags
 		// Commented out tokens are handled separately from the main replace
 		$phpbb_tags = array(
@@ -112,15 +125,16 @@ class lexer extends \Twig_Lexer
 		// Appends any filters after lang()
 		$code = preg_replace('#{L_([a-zA-Z0-9_\.]+)(\|[^}]+?)?}#', '{{ lang(\'$1\')$2 }}', $code);
 
-		// Replace all of our escaped language variables, {LA_VARNAME}, with Twig style, {{ lang('NAME')|addslashes }}
-		// Appends any filters after lang(), but before addslashes
-		$code = preg_replace('#{LA_([a-zA-Z0-9_\.]+)(\|[^}]+?)?}#', '{{ lang(\'$1\')$2|addslashes }}', $code);
+		// Replace all of our escaped language variables, {LA_VARNAME}, with Twig style, {{ lang('NAME')|escape('js') }}
+		// Appends any filters after lang(), but before escape('js')
+		$code = preg_replace('#{LA_([a-zA-Z0-9_\.]+)(\|[^}]+?)?}#', '{{ lang(\'$1\')$2|escape(\'js\') }}', $code);
 
 		// Replace all of our variables, {VARNAME}, with Twig style, {{ VARNAME }}
 		// Appends any filters
 		$code = preg_replace('#{([a-zA-Z0-9_\.]+)(\|[^}]+?)?}#', '{{ $1$2 }}', $code);
 
-		return parent::tokenize($code, $filename);
+		// Tokenize \Twig_Source instance
+		return parent::tokenize(new \Twig_Source($code, $filename));
 	}
 
 	/**
diff --git a/phpBB/phpbb/template/twig/loader.php b/phpBB/phpbb/template/twig/loader.php
index 139a413b70..c13e3ee298 100644
--- a/phpBB/phpbb/template/twig/loader.php
+++ b/phpBB/phpbb/template/twig/loader.php
@@ -21,6 +21,24 @@ class loader extends \Twig_Loader_Filesystem
 	protected $safe_directories = array();
 
 	/**
+	 * @var \phpbb\filesystem\filesystem_interface
+	 */
+	protected $filesystem;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\filesystem\filesystem_interface $filesystem
+	 * @param string|array	$paths
+	 */
+	public function __construct(\phpbb\filesystem\filesystem_interface $filesystem, $paths = array())
+	{
+		$this->filesystem = $filesystem;
+
+		parent::__construct($paths, $this->filesystem->realpath(dirname(__FILE__)));
+	}
+
+	/**
 	* Set safe directories
 	*
 	* @param array $directories Array of directories that are safe (empty to clear)
@@ -49,7 +67,7 @@ class loader extends \Twig_Loader_Filesystem
 	*/
 	public function addSafeDirectory($directory)
 	{
-		$directory = phpbb_realpath($directory);
+		$directory = $this->filesystem->realpath($directory);
 
 		if ($directory !== false)
 		{
@@ -83,6 +101,16 @@ class loader extends \Twig_Loader_Filesystem
 	}
 
 	/**
+	 * Adds a realpath call to fix a BC break in Twig 1.26 (https://github.com/twigphp/Twig/issues/2145)
+	 *
+	 * {@inheritdoc}
+	 */
+	public function addPath($path, $namespace = self::MAIN_NAMESPACE)
+	{
+		return parent::addPath($this->filesystem->realpath($path), $namespace);
+	}
+
+	/**
 	* Find the template
 	*
 	* Override for Twig_Loader_Filesystem::findTemplate to add support
@@ -119,7 +147,7 @@ class loader extends \Twig_Loader_Filesystem
 				//	can now check if we're within a "safe" directory
 
 				// Find the real path of the directory the file is in
-				$directory = phpbb_realpath(dirname($file));
+				$directory = $this->filesystem->realpath(dirname($file));
 
 				if ($directory === false)
 				{
diff --git a/phpBB/phpbb/template/twig/node/event.php b/phpBB/phpbb/template/twig/node/event.php
index b765bde98d..11fdb75247 100644
--- a/phpBB/phpbb/template/twig/node/event.php
+++ b/phpBB/phpbb/template/twig/node/event.php
@@ -46,7 +46,7 @@ class event extends \Twig_Node
 		{
 			$ext_namespace = str_replace('/', '_', $ext_namespace);
 
-			if (defined('DEBUG'))
+			if ($this->environment->isDebug())
 			{
 				// If debug mode is enabled, lets check for new/removed EVENT
 				//  templates on page load rather than at compile. This is
@@ -58,7 +58,7 @@ class event extends \Twig_Node
 				;
 			}
 
-			if (defined('DEBUG') || $this->environment->getLoader()->exists('@' . $ext_namespace . '/' . $location . '.html'))
+			if ($this->environment->isDebug() || $this->environment->getLoader()->exists('@' . $ext_namespace . '/' . $location . '.html'))
 			{
 				$compiler
 					->write("\$previous_look_up_order = \$this->env->getNamespaceLookUpOrder();\n")
@@ -70,7 +70,7 @@ class event extends \Twig_Node
 				;
 			}
 
-			if (defined('DEBUG'))
+			if ($this->environment->isDebug())
 			{
 				$compiler
 					->outdent()
diff --git a/phpBB/phpbb/template/twig/node/includeasset.php b/phpBB/phpbb/template/twig/node/includeasset.php
index 15195a226b..12034b7820 100644
--- a/phpBB/phpbb/template/twig/node/includeasset.php
+++ b/phpBB/phpbb/template/twig/node/includeasset.php
@@ -39,7 +39,7 @@ abstract class includeasset extends \Twig_Node
 			->write("\$asset_file = ")
 			->subcompile($this->getNode('expr'))
 			->raw(";\n")
-			->write("\$asset = new \phpbb\\template\\asset(\$asset_file, \$this->getEnvironment()->get_path_helper());\n")
+			->write("\$asset = new \phpbb\\template\\asset(\$asset_file, \$this->getEnvironment()->get_path_helper(), \$this->getEnvironment()->get_filesystem());\n")
 			->write("if (substr(\$asset_file, 0, 2) !== './' && \$asset->is_relative()) {\n")
 			->indent()
 				->write("\$asset_path = \$asset->get_path();")
@@ -49,33 +49,23 @@ abstract class includeasset extends \Twig_Node
 					->write("\$local_file = \$this->getEnvironment()->findTemplate(\$asset_path);\n")
 					->write("\$asset->set_path(\$local_file, true);\n")
 				->outdent()
-				->write("\$asset->add_assets_version('{$config['assets_version']}');\n")
-				->write("\$asset_file = \$asset->get_url();\n")
 				->write("}\n")
 			->outdent()
 			->write("}\n")
-			->write("\$context['definition']->append('{$this->get_definition_name()}', '")
-		;
-
-		$this->append_asset($compiler);
-
-		$compiler
-			->raw("\n');\n")
+			->write("\n")
+			->write("if (\$asset->is_relative()) {\n")
+			->indent()
+			->write("\$asset->add_assets_version('{$config['assets_version']}');\n")
+			->outdent()
+			->write("}\n")
+			->write("\$this->getEnvironment()->get_assets_bag()->add_{$this->get_setters_name()}(\$asset);")
 		;
 	}
 
 	/**
-	* Get the definition name
-	*
-	* @return string (e.g. 'SCRIPTS')
-	*/
-	abstract public function get_definition_name();
-
-	/**
-	* Append the output code for the asset
+	* Get the name of the assets bag setter
 	*
-	* @param \Twig_Compiler A Twig_Compiler instance
-	* @return null
+	* @return string (e.g. 'script')
 	*/
-	abstract protected function append_asset(\Twig_Compiler $compiler);
+	abstract public function get_setters_name();
 }
diff --git a/phpBB/phpbb/template/twig/node/includecss.php b/phpBB/phpbb/template/twig/node/includecss.php
index 2dac154036..2e97d4972d 100644
--- a/phpBB/phpbb/template/twig/node/includecss.php
+++ b/phpBB/phpbb/template/twig/node/includecss.php
@@ -18,20 +18,8 @@ class includecss extends \phpbb\template\twig\node\includeasset
 	/**
 	* {@inheritdoc}
 	*/
-	public function get_definition_name()
+	public function get_setters_name()
 	{
-		return 'STYLESHEETS';
-	}
-
-	/**
-	* {@inheritdoc}
-	*/
-	public function append_asset(\Twig_Compiler $compiler)
-	{
-		$compiler
-			->raw("<link href=\"' . ")
-			->raw("\$asset_file . '\"")
-			->raw(' rel="stylesheet" type="text/css" media="screen" />')
-		;
+		return 'stylesheet';
 	}
 }
diff --git a/phpBB/phpbb/template/twig/node/includejs.php b/phpBB/phpbb/template/twig/node/includejs.php
index 0f67f9ff60..505b49757b 100644
--- a/phpBB/phpbb/template/twig/node/includejs.php
+++ b/phpBB/phpbb/template/twig/node/includejs.php
@@ -18,22 +18,8 @@ class includejs extends \phpbb\template\twig\node\includeasset
 	/**
 	* {@inheritdoc}
 	*/
-	public function get_definition_name()
+	public function get_setters_name()
 	{
-		return 'SCRIPTS';
-	}
-
-	/**
-	* {@inheritdoc}
-	*/
-	protected function append_asset(\Twig_Compiler $compiler)
-	{
-		$config = $this->environment->get_phpbb_config();
-
-		$compiler
-			->raw("<script type=\"text/javascript\" src=\"' . ")
-			->raw("\$asset_file")
-			->raw(". '\"></script>\n")
-		;
+		return 'script';
 	}
 }
diff --git a/phpBB/phpbb/template/twig/twig.php b/phpBB/phpbb/template/twig/twig.php
index d1bbb2b55a..f322778eda 100644
--- a/phpBB/phpbb/template/twig/twig.php
+++ b/phpBB/phpbb/template/twig/twig.php
@@ -13,6 +13,8 @@
 
 namespace phpbb\template\twig;
 
+use phpbb\template\exception\user_object_not_available;
+
 /**
 * Twig Template class.
 */
@@ -76,11 +78,14 @@ class twig extends \phpbb\template\base
 	*
 	* @param \phpbb\path_helper $path_helper
 	* @param \phpbb\config\config $config
-	* @param \phpbb\user $user
 	* @param \phpbb\template\context $context template context
+	* @param \phpbb\template\twig\environment $twig_environment
+	* @param string $cache_path
+	* @param \phpbb\user|null $user
+	* @param array|\ArrayAccess $extensions
 	* @param \phpbb\extension\manager $extension_manager extension manager, if null then template events will not be invoked
 	*/
-	public function __construct(\phpbb\path_helper $path_helper, $config, $user, \phpbb\template\context $context, \phpbb\extension\manager $extension_manager = null)
+	public function __construct(\phpbb\path_helper $path_helper, $config, \phpbb\template\context $context, \phpbb\template\twig\environment $twig_environment, $cache_path, \phpbb\user $user = null, $extensions = array(), \phpbb\extension\manager $extension_manager = null)
 	{
 		$this->path_helper = $path_helper;
 		$this->phpbb_root_path = $path_helper->get_phpbb_root_path();
@@ -89,41 +94,14 @@ class twig extends \phpbb\template\base
 		$this->user = $user;
 		$this->context = $context;
 		$this->extension_manager = $extension_manager;
+		$this->cachepath = $cache_path;
+		$this->twig = $twig_environment;
 
-		$this->cachepath = $this->phpbb_root_path . 'cache/twig/';
-
-		// Initiate the loader, __main__ namespace paths will be setup later in set_style_names()
-		$loader = new \phpbb\template\twig\loader('');
-
-		$this->twig = new \phpbb\template\twig\environment(
-			$this->config,
-			$this->path_helper,
-			$this->extension_manager,
-			$loader,
-			array(
-				'cache'			=> (defined('IN_INSTALL')) ? false : $this->cachepath,
-				'debug'			=> defined('DEBUG'),
-				'auto_reload'	=> (bool) $this->config['load_tplcompile'],
-				'autoescape'	=> false,
-			)
-		);
-
-		$this->twig->addExtension(
-			new \phpbb\template\twig\extension(
-				$this->context,
-				$this->user
-			)
-		);
-
-		if (defined('DEBUG'))
+		foreach ($extensions as $extension)
 		{
-			$this->twig->addExtension(new \Twig_Extension_Debug());
+			$this->twig->addExtension($extension);
 		}
 
-		$lexer = new \phpbb\template\twig\lexer($this->twig);
-
-		$this->twig->setLexer($lexer);
-
 		// Add admin namespace
 		if ($this->path_helper->get_adm_relative_path() !== null && is_dir($this->phpbb_root_path . $this->path_helper->get_adm_relative_path() . 'style/'))
 		{
@@ -150,9 +128,16 @@ class twig extends \phpbb\template\base
 	* Get the style tree of the style preferred by the current user
 	*
 	* @return array Style tree, most specific first
+	*
+	* @throws \phpbb\template\exception\user_object_not_available	When user service was not set
 	*/
 	public function get_user_style()
 	{
+		if ($this->user === null)
+		{
+			throw new user_object_not_available();
+		}
+
 		$style_list = array(
 			$this->user->style['style_path'],
 		);
@@ -368,14 +353,24 @@ class twig extends \phpbb\template\base
 			$context_vars['.'][0], // To get normal vars
 			array(
 				'definition'	=> new \phpbb\template\twig\definition(),
-				'user'			=> $this->user,
 				'loops'			=> $context_vars, // To get loops
 			)
 		);
 
+		if ($this->user instanceof \phpbb\user)
+		{
+			$vars['user'] = $this->user;
+		}
+
 		// cleanup
 		unset($vars['loops']['.']);
 
+		// Inject in the main context the value added by assign_block_vars() to be able to use directly the Twig loops.
+		foreach ($vars['loops'] as $key => &$value)
+		{
+			$vars[$key] = $value;
+		}
+
 		return $vars;
 	}
 
diff --git a/phpBB/phpbb/textformatter/cache_interface.php b/phpBB/phpbb/textformatter/cache_interface.php
new file mode 100644
index 0000000000..f6b5f195c7
--- /dev/null
+++ b/phpBB/phpbb/textformatter/cache_interface.php
@@ -0,0 +1,31 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\textformatter;
+
+/**
+* Currently only used to signal that something that could effect the rendering has changed.
+* BBCodes, smilies, censored words, templates, etc...
+*/
+interface cache_interface
+{
+	/**
+	* Invalidate and/or regenerate this text formatter's cache(s)
+	*/
+	public function invalidate();
+
+	/**
+	* Tidy/prune this text formatter's cache(s)
+	*/
+	public function tidy();
+}
diff --git a/phpBB/phpbb/textformatter/data_access.php b/phpBB/phpbb/textformatter/data_access.php
new file mode 100644
index 0000000000..0d37e62c87
--- /dev/null
+++ b/phpBB/phpbb/textformatter/data_access.php
@@ -0,0 +1,252 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\textformatter;
+
+/**
+* Data access layer that fetchs BBCodes, smilies and censored words from the database.
+* To be extended to include insert/update/delete operations.
+*
+* Also used to get templates.
+*/
+class data_access
+{
+	/**
+	* @var string Name of the BBCodes table
+	*/
+	protected $bbcodes_table;
+
+	/**
+	* @var \phpbb\db\driver\driver_interface
+	*/
+	protected $db;
+
+	/**
+	* @var string Name of the smilies table
+	*/
+	protected $smilies_table;
+
+	/**
+	* @var string Name of the styles table
+	*/
+	protected $styles_table;
+
+	/**
+	* @var string Path to the styles dir
+	*/
+	protected $styles_path;
+
+	/**
+	* @var string Name of the words table
+	*/
+	protected $words_table;
+
+	/**
+	* Constructor
+	*
+	* @param \phpbb\db\driver\driver_interface $db Database connection
+	* @param string $bbcodes_table Name of the BBCodes table
+	* @param string $smilies_table Name of the smilies table
+	* @param string $styles_table  Name of the styles table
+	* @param string $words_table   Name of the words table
+	* @param string $styles_path   Path to the styles dir
+	*/
+	public function __construct(\phpbb\db\driver\driver_interface $db, $bbcodes_table, $smilies_table, $styles_table, $words_table, $styles_path)
+	{
+		$this->db = $db;
+
+		$this->bbcodes_table = $bbcodes_table;
+		$this->smilies_table = $smilies_table;
+		$this->styles_table  = $styles_table;
+		$this->words_table   = $words_table;
+
+		$this->styles_path = $styles_path;
+	}
+
+	/**
+	* Return the list of custom BBCodes
+	*
+	* @return array
+	*/
+	public function get_bbcodes()
+	{
+		$sql = 'SELECT bbcode_match, bbcode_tpl FROM ' . $this->bbcodes_table;
+
+		return $this->fetch_decoded_rowset($sql, ['bbcode_match']);
+	}
+
+	/**
+	* Return the list of smilies
+	*
+	* @return array
+	*/
+	public function get_smilies()
+	{
+		// NOTE: smilies that are displayed on the posting page are processed first because they're
+		//       typically the most used smilies and it ends up producing a slightly more efficient
+		//       renderer
+		$sql = 'SELECT code, emotion, smiley_url, smiley_width, smiley_height
+			FROM ' . $this->smilies_table . '
+			ORDER BY display_on_posting DESC';
+
+		return $this->fetch_decoded_rowset($sql, ['code', 'emotion', 'smiley_url']);
+	}
+
+	/**
+	* Return the list of installed styles
+	*
+	* @return array
+	*/
+	protected function get_styles()
+	{
+		$sql = 'SELECT style_id, style_path, style_parent_id, bbcode_bitfield FROM ' . $this->styles_table;
+
+		return $this->fetch_decoded_rowset($sql);
+	}
+
+	/**
+	* Return the bbcode.html template for every installed style
+	*
+	* @return array 2D array. style_id as keys, each element is an array with a "template" element that contains the style's bbcode.html and a "bbcodes" element that contains the name of each BBCode that is to be stylised
+	*/
+	public function get_styles_templates()
+	{
+		$templates = array();
+
+		$bbcode_ids = array(
+			'quote' => 0,
+			'b'     => 1,
+			'i'     => 2,
+			'url'   => 3,
+			'img'   => 4,
+			'size'  => 5,
+			'color' => 6,
+			'u'     => 7,
+			'code'  => 8,
+			'list'  => 9,
+			'*'     => 9,
+			'email' => 10,
+			'flash' => 11,
+			'attachment' => 12,
+		);
+
+		$styles = array();
+		foreach ($this->get_styles() as $row)
+		{
+			$styles[$row['style_id']] = $row;
+		}
+
+		foreach ($styles as $style_id => $style)
+		{
+			$bbcodes = array();
+
+			// Collect the name of the BBCodes whose bit is set in the style's bbcode_bitfield
+			$template_bitfield = new \bitfield($style['bbcode_bitfield']);
+			foreach ($bbcode_ids as $bbcode_name => $bit)
+			{
+				if ($template_bitfield->get($bit))
+				{
+					$bbcodes[] = $bbcode_name;
+				}
+			}
+
+			$filename = $this->resolve_style_filename($styles, $style);
+			if ($filename === false)
+			{
+				// Ignore this style, it will use the default templates
+				continue;
+			}
+
+			$templates[$style_id] = array(
+				'bbcodes'  => $bbcodes,
+				'template' => file_get_contents($filename),
+			);
+		}
+
+		return $templates;
+	}
+
+	/**
+	* Resolve inheritance for given style and return the path to their bbcode.html file
+	*
+	* @param  array       $styles Associative array of [style_id => style] containing all styles
+	* @param  array       $style  Style for which we resolve
+	* @return string|bool         Path to this style's bbcode.html, or FALSE
+	*/
+	protected function resolve_style_filename(array $styles, array $style)
+	{
+		// Look for a bbcode.html in this style's dir
+		$filename = $this->styles_path . $style['style_path'] . '/template/bbcode.html';
+		if (file_exists($filename))
+		{
+			return $filename;
+		}
+
+		// Resolve using this style's parent
+		$parent_id = $style['style_parent_id'];
+		if ($parent_id && !empty($styles[$parent_id]))
+		{
+			return $this->resolve_style_filename($styles, $styles[$parent_id]);
+		}
+
+		return false;
+	}
+
+	/**
+	* Return the list of censored words
+	*
+	* @return array
+	*/
+	public function get_censored_words()
+	{
+		$sql = 'SELECT word, replacement FROM ' . $this->words_table;
+
+		return $this->fetch_decoded_rowset($sql, ['word', 'replacement']);
+	}
+
+	/**
+	* Decode HTML special chars in given rowset
+	*
+	* @param  array $rows    Original rowset
+	* @param  array $columns List of columns to decode
+	* @return array          Decoded rowset
+	*/
+	protected function decode_rowset(array $rows, array $columns)
+	{
+		foreach ($rows as &$row)
+		{
+			foreach ($columns as $column)
+			{
+				$row[$column] = htmlspecialchars_decode($row[$column]);
+			}
+		}
+
+		return $rows;
+	}
+
+	/**
+	* Fetch all rows for given query and decode plain text columns
+	*
+	* @param  string $sql     SELECT query
+	* @param  array  $columns List of columns to decode
+	* @return array
+	*/
+	protected function fetch_decoded_rowset($sql, array $columns = [])
+	{
+		$result = $this->db->sql_query($sql);
+		$rows = $this->db->sql_fetchrowset($result);
+		$this->db->sql_freeresult($result);
+
+		return $this->decode_rowset($rows, $columns);
+	}
+}
diff --git a/phpBB/phpbb/textformatter/parser_interface.php b/phpBB/phpbb/textformatter/parser_interface.php
new file mode 100644
index 0000000000..ad611fb5b4
--- /dev/null
+++ b/phpBB/phpbb/textformatter/parser_interface.php
@@ -0,0 +1,112 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\textformatter;
+
+interface parser_interface
+{
+	/**
+	* Parse given text
+	*
+	* @param  string $text
+	* @return string
+	*/
+	public function parse($text);
+
+	/**
+	* Disable a specific BBCode
+	*
+	* @param  string $name BBCode name
+	* @return null
+	*/
+	public function disable_bbcode($name);
+
+	/**
+	* Disable BBCodes in general
+	*/
+	public function disable_bbcodes();
+
+	/**
+	* Disable the censor
+	*/
+	public function disable_censor();
+
+	/**
+	* Disable magic URLs
+	*/
+	public function disable_magic_url();
+
+	/**
+	* Disable smilies
+	*/
+	public function disable_smilies();
+
+	/**
+	* Enable a specific BBCode
+	*
+	* @param  string $name BBCode name
+	* @return null
+	*/
+	public function enable_bbcode($name);
+
+	/**
+	* Enable BBCodes in general
+	*/
+	public function enable_bbcodes();
+
+	/**
+	* Enable the censor
+	*/
+	public function enable_censor();
+
+	/**
+	* Enable magic URLs
+	*/
+	public function enable_magic_url();
+
+	/**
+	* Enable smilies
+	*/
+	public function enable_smilies();
+
+	/**
+	* Get the list of errors that were generated during last parsing
+	*
+	* @return array[] Array of arrays. Each array contains a lang string at index 0 plus any number
+	*                 of optional parameters
+	*/
+	public function get_errors();
+
+	/**
+	* Set a variable to be used by the parser
+	*
+	*  - max_font_size
+	*  - max_img_height
+	*  - max_img_width
+	*  - max_smilies
+	*  - max_urls
+	*
+	* @param  string $name
+	* @param  mixed  $value
+	* @return null
+	*/
+	public function set_var($name, $value);
+
+	/**
+	* Set multiple variables to be used by the parser
+	*
+	* @param  array $vars Associative array of [name => value]
+	* @return null
+	*/
+	public function set_vars(array $vars);
+}
diff --git a/phpBB/phpbb/textformatter/renderer_interface.php b/phpBB/phpbb/textformatter/renderer_interface.php
new file mode 100644
index 0000000000..609b0bb642
--- /dev/null
+++ b/phpBB/phpbb/textformatter/renderer_interface.php
@@ -0,0 +1,92 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\textformatter;
+
+interface renderer_interface
+{
+	/**
+	* Render given text
+	*
+	* @param  string $text Text, as parsed by something that implements \phpbb\textformatter\parser
+	* @return string
+	*/
+	public function render($text);
+
+	/**
+	* Set the smilies' path
+	*
+	* @return null
+	*/
+	public function set_smilies_path($path);
+
+	/**
+	* Return the value of the "viewcensors" option
+	*
+	* @return bool Option's value
+	*/
+	public function get_viewcensors();
+
+	/**
+	* Return the value of the "viewflash" option
+	*
+	* @return bool Option's value
+	*/
+	public function get_viewflash();
+
+	/**
+	* Return the value of the "viewimg" option
+	*
+	* @return bool Option's value
+	*/
+	public function get_viewimg();
+
+	/**
+	* Return the value of the "viewsmilies" option
+	*
+	* @return bool Option's value
+	*/
+	public function get_viewsmilies();
+
+	/**
+	* Set the "viewcensors" option
+	*
+	* @param  bool $value Option's value
+	* @return null
+	*/
+	public function set_viewcensors($value);
+
+	/**
+	* Set the "viewflash" option
+	*
+	* @param  bool $value Option's value
+	* @return null
+	*/
+	public function set_viewflash($value);
+
+	/**
+	* Set the "viewimg" option
+	*
+	* @param  bool $value Option's value
+	* @return null
+	*/
+	public function set_viewimg($value);
+
+	/**
+	* Set the "viewsmilies" option
+	*
+	* @param  bool $value Option's value
+	* @return null
+	*/
+	public function set_viewsmilies($value);
+}
diff --git a/phpBB/phpbb/textformatter/s9e/bbcode_merger.php b/phpBB/phpbb/textformatter/s9e/bbcode_merger.php
new file mode 100644
index 0000000000..264eb93782
--- /dev/null
+++ b/phpBB/phpbb/textformatter/s9e/bbcode_merger.php
@@ -0,0 +1,199 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\textformatter\s9e;
+
+use phpbb\textformatter\s9e\factory;
+use s9e\TextFormatter\Configurator\Helpers\TemplateHelper;
+use s9e\TextFormatter\Configurator\Items\UnsafeTemplate;
+
+class bbcode_merger
+{
+	/**
+	* @var \s9e\TextFormatter\Configurator $configurator Configurator instance used to inspect BBCodes
+	*/
+	protected $configurator;
+
+	/**
+	* @param \phpbb\textformatter\s9e\factory $factory
+	*/
+	public function __construct(factory $factory)
+	{
+		$this->configurator = $factory->get_configurator();
+	}
+
+	/**
+	* Merge two BBCode definitions
+	*
+	* All of the arrays contain a "usage" element and a "template" element
+	*
+	* @throws InvalidArgumentException if a definition cannot be interpreted
+	* @throws RuntimeException if something unexpected occurs
+	*
+	* @param  array $without BBCode definition without an attribute
+	* @param  array $with    BBCode definition with an attribute
+	* @return array          Merged definition
+	*/
+	public function merge_bbcodes(array $without, array $with)
+	{
+		$without = $this->create_bbcode($without);
+		$with    = $this->create_bbcode($with);
+
+		// Select the appropriate strategy for merging this BBCode
+		if (!$this->is_optional_bbcode($without, $with) && $this->is_content_bbcode($without, $with))
+		{
+			$merged = $this->merge_content_bbcode($without, $with);
+		}
+		else
+		{
+			$merged = $this->merge_optional_bbcode($without, $with);
+		}
+
+		$merged['template'] = $this->normalize_template($merged['template']);
+
+		return $merged;
+	}
+
+	/**
+	* Create a custom BBCode for inspection
+	*
+	* @param  array $definition Original BBCode definition
+	* @return array             Updated definition containing a BBCode object and a Tag
+	*/
+	protected function create_bbcode(array $definition)
+	{
+		$bbcode = $this->configurator->BBCodes->addCustom(
+			$definition['usage'],
+			new UnsafeTemplate($definition['template'])
+		);
+
+		$definition['bbcode'] = $bbcode;
+		$definition['tag']    = $this->configurator->tags[$bbcode->tagName];
+
+		return $definition;
+	}
+
+	/**
+	* Indent given template for readability
+	*
+	* @param  string $template
+	* @return string
+	*/
+	protected function indent_template($template)
+	{
+		$dom = TemplateHelper::loadTemplate($template);
+		$dom->formatOutput = true;
+		$template = TemplateHelper::saveTemplate($dom);
+
+		// Remove the first level of indentation if the template starts with whitespace
+		if (preg_match('(^\\n +)', $template, $m))
+		{
+			$template = str_replace($m[0], "\n", $template);
+		}
+
+		return trim($template);
+	}
+
+	/**
+	* Test whether the two definitions form a "content"-style BBCode
+	*
+	* Such BBCodes include the [url] BBCode, which uses its text content as
+	* attribute if none is provided
+	*
+	* @param  array $without BBCode definition without an attribute
+	* @param  array $with    BBCode definition with an attribute
+	* @return bool
+	*/
+	protected function is_content_bbcode(array $without, array $with)
+	{
+		// Test whether we find the same non-TEXT token between "]" and "[" in the usage
+		// as between ">" and "<" in the template
+		return (preg_match('(\\]\\s*(\\{(?!TEXT)[^}]+\\})\\s*\\[)', $without['usage'], $m)
+			&& preg_match('(>[^<]*?' . preg_quote($m[1]) . '[^>]*?<)s', $without['template']));
+	}
+
+	/**
+	* Test whether the two definitions form BBCode with an optional attribute
+	*
+	* @param  array $without BBCode definition without an attribute
+	* @param  array $with    BBCode definition with an attribute
+	* @return bool
+	*/
+	protected function is_optional_bbcode(array $without, array $with)
+	{
+		// Remove the default attribute from the definition
+		$with['usage'] = preg_replace('(=[^\\]]++)', '', $with['usage']);
+
+		// Test whether both definitions are the same, regardless of case
+		return strcasecmp($without['usage'], $with['usage']) === 0;
+	}
+
+	/**
+	* Merge the two BBCode definitions of a "content"-style BBCode
+	*
+	* @param  array $without BBCode definition without an attribute
+	* @param  array $with    BBCode definition with an attribute
+	* @return array          Merged definition
+	*/
+	protected function merge_content_bbcode(array $without, array $with)
+	{
+		// Convert [x={X}] into [x={X;useContent}]
+		$usage = preg_replace('(\\})', ';useContent}', $with['usage'], 1);
+
+		// Use the template from the definition that uses an attribute
+		$template = $with['tag']->template;
+
+		return ['usage' => $usage, 'template' => $template];
+	}
+
+	/**
+	* Merge the two BBCode definitions of a BBCode with an optional argument
+	*
+	* Such BBCodes include the [quote] BBCode, which takes an optional argument
+	* but otherwise does not behave differently
+	*
+	* @param  array $without BBCode definition without an attribute
+	* @param  array $with    BBCode definition with an attribute
+	* @return array          Merged definition
+	*/
+	protected function merge_optional_bbcode(array $without, array $with)
+	{
+		// Convert [X={X}] into [X={X?}]
+		$usage = preg_replace('(\\})', '?}', $with['usage'], 1);
+
+		// Build a template for both versions
+		$template = '<xsl:choose><xsl:when test="@' . $with['bbcode']->defaultAttribute . '">' . $with['tag']->template . '</xsl:when><xsl:otherwise>' . $without['tag']->template . '</xsl:otherwise></xsl:choose>';
+
+		return ['usage' => $usage, 'template' => $template];
+	}
+
+	/**
+	* Normalize a template
+	*
+	* @param  string $template
+	* @return string
+	*/
+	protected function normalize_template($template)
+	{
+		// Normalize the template to simplify it
+		$template = $this->configurator->templateNormalizer->normalizeTemplate($template);
+
+		// Convert xsl:value-of elements back to {L_} tokens where applicable
+		$template = preg_replace('(<xsl:value-of select="\\$(L_\\w+)"/>)', '{$1}', $template);
+
+		// Beautify the template
+		$template = $this->indent_template($template);
+
+		return $template;
+	}
+}
diff --git a/phpBB/phpbb/textformatter/s9e/factory.php b/phpBB/phpbb/textformatter/s9e/factory.php
new file mode 100644
index 0000000000..f82c7b0771
--- /dev/null
+++ b/phpBB/phpbb/textformatter/s9e/factory.php
@@ -0,0 +1,678 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\textformatter\s9e;
+
+use s9e\TextFormatter\Configurator;
+use s9e\TextFormatter\Configurator\Items\AttributeFilters\RegexpFilter;
+use s9e\TextFormatter\Configurator\Items\UnsafeTemplate;
+
+/**
+* Creates s9e\TextFormatter objects
+*/
+class factory implements \phpbb\textformatter\cache_interface
+{
+	/**
+	* @var \phpbb\textformatter\s9e\link_helper
+	*/
+	protected $link_helper;
+
+	/**
+	* @var \phpbb\cache\driver\driver_interface
+	*/
+	protected $cache;
+
+	/**
+	* @var string Path to the cache dir
+	*/
+	protected $cache_dir;
+
+	/**
+	* @var string Cache key used for the parser
+	*/
+	protected $cache_key_parser;
+
+	/**
+	* @var string Cache key used for the renderer
+	*/
+	protected $cache_key_renderer;
+
+	/**
+	* @var \phpbb\config\config
+	*/
+	protected $config;
+
+	/**
+	* @var array Custom tokens used in bbcode.html and their corresponding token from the definition
+	*/
+	protected $custom_tokens = array(
+		'email' => array('{DESCRIPTION}' => '{TEXT}'),
+		'flash' => array('{WIDTH}' => '{NUMBER1}', '{HEIGHT}' => '{NUMBER2}'),
+		'img'   => array('{URL}' => '{IMAGEURL}'),
+		'list'  => array('{LIST_TYPE}' => '{HASHMAP}'),
+		'quote' => array('{USERNAME}' => '{TEXT1}'),
+		'size'  => array('{SIZE}' => '{FONTSIZE}'),
+		'url'   => array('{DESCRIPTION}' => '{TEXT}'),
+	);
+
+	/**
+	* @var \phpbb\textformatter\data_access
+	*/
+	protected $data_access;
+
+	/**
+	* @var array Default BBCode definitions
+	*/
+	protected $default_definitions = array(
+		'attachment' => '[ATTACHMENT index={NUMBER} filename={TEXT;useContent}]',
+		'b'     => '[B]{TEXT}[/B]',
+		'code'  => '[CODE lang={IDENTIFIER;optional}]{TEXT}[/CODE]',
+		'color' => '[COLOR={COLOR}]{TEXT}[/COLOR]',
+		'email' => '[EMAIL={EMAIL;useContent} subject={TEXT1;optional;postFilter=rawurlencode} body={TEXT2;optional;postFilter=rawurlencode}]{TEXT}[/EMAIL]',
+		'flash' => '[FLASH={NUMBER1},{NUMBER2} width={NUMBER1;postFilter=#flashwidth} height={NUMBER2;postFilter=#flashheight} url={URL;useContent} /]',
+		'i'     => '[I]{TEXT}[/I]',
+		'img'   => '[IMG src={IMAGEURL;useContent}]',
+		'list'  => '[LIST type={HASHMAP=1:decimal,a:lower-alpha,A:upper-alpha,i:lower-roman,I:upper-roman;optional;postFilter=#simpletext} #createChild=LI]{TEXT}[/LIST]',
+		'li'    => '[* $tagName=LI]{TEXT}[/*]',
+		'quote' =>
+			"[QUOTE
+				author={TEXT1;optional}
+				post_id={UINT;optional}
+				post_url={URL;optional;postFilter=#false}
+				msg_id={UINT;optional}
+				msg_url={URL;optional;postFilter=#false}
+				profile_url={URL;optional;postFilter=#false}
+				time={UINT;optional}
+				url={URL;optional}
+				user_id={UINT;optional}
+				author={PARSE=/^\\[url=(?'url'.*?)](?'author'.*)\\[\\/url]$/i}
+				author={PARSE=/^\\[url](?'author'(?'url'.*?))\\[\\/url]$/i}
+				author={PARSE=/(?'url'https?:\\/\\/[^[\\]]+)/i}
+			]{TEXT2}[/QUOTE]",
+		'size'  => '[SIZE={FONTSIZE}]{TEXT}[/SIZE]',
+		'u'     => '[U]{TEXT}[/U]',
+		'url'   => '[URL={URL;useContent} $forceLookahead=true]{TEXT}[/URL]',
+	);
+
+	/**
+	* @var array Default templates, taken from bbcode::bbcode_tpl()
+	*/
+	protected $default_templates = array(
+		'b'     => '<span style="font-weight: bold"><xsl:apply-templates/></span>',
+		'i'     => '<span style="font-style: italic"><xsl:apply-templates/></span>',
+		'u'     => '<span style="text-decoration: underline"><xsl:apply-templates/></span>',
+		'img'   => '<img src="{IMAGEURL}" class="postimage" alt="{L_IMAGE}"/>',
+		'size'	=> '<span><xsl:attribute name="style"><xsl:text>font-size: </xsl:text><xsl:value-of select="substring(@size, 1, 4)"/><xsl:text>%; line-height: normal</xsl:text></xsl:attribute><xsl:apply-templates/></span>',
+		'color' => '<span style="color: {COLOR}"><xsl:apply-templates/></span>',
+		'email' => '<a>
+			<xsl:attribute name="href">
+				<xsl:text>mailto:</xsl:text>
+				<xsl:value-of select="@email"/>
+				<xsl:if test="@subject or @body">
+					<xsl:text>?</xsl:text>
+					<xsl:if test="@subject">subject=<xsl:value-of select="@subject"/></xsl:if>
+					<xsl:if test="@body"><xsl:if test="@subject">&amp;</xsl:if>body=<xsl:value-of select="@body"/></xsl:if>
+				</xsl:if>
+			</xsl:attribute>
+			<xsl:apply-templates/>
+		</a>',
+	);
+
+	/**
+	* @var \phpbb\event\dispatcher_interface
+	*/
+	protected $dispatcher;
+
+	/**
+	* @var \phpbb\log\log_interface
+	*/
+	protected $log;
+
+	/**
+	* Constructor
+	*
+	* @param \phpbb\textformatter\data_access $data_access
+	* @param \phpbb\cache\driver\driver_interface $cache
+	* @param \phpbb\event\dispatcher_interface $dispatcher
+	* @param \phpbb\config\config $config
+	* @param \phpbb\textformatter\s9e\link_helper $link_helper
+	* @param \phpbb\log\log_interface $log
+	* @param string $cache_dir          Path to the cache dir
+	* @param string $cache_key_parser   Cache key used for the parser
+	* @param string $cache_key_renderer Cache key used for the renderer
+	*/
+	public function __construct(\phpbb\textformatter\data_access $data_access, \phpbb\cache\driver\driver_interface $cache, \phpbb\event\dispatcher_interface $dispatcher, \phpbb\config\config $config, \phpbb\textformatter\s9e\link_helper $link_helper, \phpbb\log\log_interface $log, $cache_dir, $cache_key_parser, $cache_key_renderer)
+	{
+		$this->link_helper = $link_helper;
+		$this->cache = $cache;
+		$this->cache_dir = $cache_dir;
+		$this->cache_key_parser = $cache_key_parser;
+		$this->cache_key_renderer = $cache_key_renderer;
+		$this->config = $config;
+		$this->data_access = $data_access;
+		$this->dispatcher = $dispatcher;
+		$this->log = $log;
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function invalidate()
+	{
+		$this->regenerate();
+	}
+
+	/**
+	* {@inheritdoc}
+	*
+	* Will remove old renderers from the cache dir but won't touch the current renderer
+	*/
+	public function tidy()
+	{
+		// Get the name of current renderer
+		$renderer_data = $this->cache->get($this->cache_key_renderer);
+		$renderer_file = ($renderer_data) ? $renderer_data['class'] . '.php' : null;
+
+		foreach (glob($this->cache_dir . 's9e_*') as $filename)
+		{
+			// Only remove the file if it's not the current renderer
+			if (!$renderer_file || substr($filename, -strlen($renderer_file)) !== $renderer_file)
+			{
+				unlink($filename);
+			}
+		}
+	}
+
+	/**
+	* Generate and return a new configured instance of s9e\TextFormatter\Configurator
+	*
+	* @return Configurator
+	*/
+	public function get_configurator()
+	{
+		// Create a new Configurator
+		$configurator = new Configurator;
+
+		/**
+		* Modify the s9e\TextFormatter configurator before the default settings are set
+		*
+		* @event core.text_formatter_s9e_configure_before
+		* @var \s9e\TextFormatter\Configurator configurator Configurator instance
+		* @since 3.2.0-a1
+		*/
+		$vars = array('configurator');
+		extract($this->dispatcher->trigger_event('core.text_formatter_s9e_configure_before', compact($vars)));
+
+		// Reset the list of allowed schemes
+		foreach ($configurator->urlConfig->getAllowedSchemes() as $scheme)
+		{
+			$configurator->urlConfig->disallowScheme($scheme);
+		}
+		foreach (explode(',', $this->config['allowed_schemes_links']) as $scheme)
+		{
+			$configurator->urlConfig->allowScheme(trim($scheme));
+		}
+
+		// Convert newlines to br elements by default
+		$configurator->rootRules->enableAutoLineBreaks();
+
+		// Don't automatically ignore text in places where text is not allowed
+		$configurator->rulesGenerator->remove('IgnoreTextIfDisallowed');
+
+		// Don't remove comments and instead convert them to xsl:comment elements
+		$configurator->templateNormalizer->remove('RemoveComments');
+		$configurator->templateNormalizer->add('TransposeComments');
+
+		// Set the rendering engine and configure it to save to the cache dir
+		$configurator->rendering->engine = 'PHP';
+		$configurator->rendering->engine->cacheDir = $this->cache_dir;
+		$configurator->rendering->engine->defaultClassPrefix = 's9e_renderer_';
+		$configurator->rendering->engine->enableQuickRenderer = true;
+
+		// Create custom filters for BBCode tokens that are supported in phpBB but not in
+		// s9e\TextFormatter
+		$filter = new RegexpFilter('#^' . get_preg_expression('relative_url') . '$#Du');
+		$configurator->attributeFilters->add('#local_url', $filter);
+		$configurator->attributeFilters->add('#relative_url', $filter);
+
+		// INTTEXT regexp from acp_bbcodes
+		$filter = new RegexpFilter('!^([\p{L}\p{N}\-+,_. ]+)$!Du');
+		$configurator->attributeFilters->add('#inttext', $filter);
+
+		// Create custom filters for Flash restrictions, which use the same values as the image
+		// restrictions but have their own error message
+		$configurator->attributeFilters
+			->add('#flashheight', __NAMESPACE__ . '\\parser::filter_flash_height')
+			->addParameterByName('max_img_height')
+			->addParameterByName('logger');
+
+		$configurator->attributeFilters
+			->add('#flashwidth', __NAMESPACE__ . '\\parser::filter_flash_width')
+			->addParameterByName('max_img_width')
+			->addParameterByName('logger');
+
+		// Create a custom filter for phpBB's per-mode font size limits
+		$configurator->attributeFilters
+			->add('#fontsize', __NAMESPACE__ . '\\parser::filter_font_size')
+			->addParameterByName('max_font_size')
+			->addParameterByName('logger')
+			->markAsSafeInCSS();
+
+		// Create a custom filter for image URLs
+		$configurator->attributeFilters
+			->add('#imageurl', __NAMESPACE__ . '\\parser::filter_img_url')
+			->addParameterByName('urlConfig')
+			->addParameterByName('logger')
+			->addParameterByName('max_img_height')
+			->addParameterByName('max_img_width')
+			->markAsSafeAsURL()
+			->setJS('UrlFilter.filter');
+
+		// Add default BBCodes
+		foreach ($this->get_default_bbcodes($configurator) as $bbcode)
+		{
+			$this->add_bbcode($configurator, $bbcode['usage'], $bbcode['template']);
+		}
+		if (isset($configurator->tags['QUOTE']))
+		{
+			// Remove the nesting limit and let other services remove quotes at parsing time
+			$configurator->tags['QUOTE']->nestingLimit = PHP_INT_MAX;
+		}
+
+		// Modify the template to disable images/flash depending on user's settings
+		foreach (array('FLASH', 'IMG') as $name)
+		{
+			$tag = $configurator->tags[$name];
+			$tag->template = '<xsl:choose><xsl:when test="$S_VIEW' . $name . '">' . $tag->template . '</xsl:when><xsl:otherwise><xsl:apply-templates/></xsl:otherwise></xsl:choose>';
+		}
+
+		// Load custom BBCodes
+		foreach ($this->data_access->get_bbcodes() as $row)
+		{
+			// Insert the board's URL before {LOCAL_URL} tokens
+			$tpl = preg_replace_callback(
+				'#\\{LOCAL_URL\\d*\\}#',
+				function ($m)
+				{
+					return generate_board_url() . '/' . $m[0];
+				},
+				$row['bbcode_tpl']
+			);
+			$this->add_bbcode($configurator, $row['bbcode_match'], $tpl);
+		}
+
+		// Load smilies
+		foreach ($this->data_access->get_smilies() as $row)
+		{
+			$configurator->Emoticons->set(
+				$row['code'],
+				'<img class="smilies" src="{$T_SMILIES_PATH}/' . $this->escape_html_attribute($row['smiley_url']) . '" width="' . $row['smiley_width'] . '" height="' . $row['smiley_height'] . '" alt="{.}" title="' . $this->escape_html_attribute($row['emotion']) . '"/>'
+			);
+		}
+
+		if (isset($configurator->Emoticons))
+		{
+			// Force emoticons to be rendered as text if $S_VIEWSMILIES is not set
+			$configurator->Emoticons->notIfCondition = 'not($S_VIEWSMILIES)';
+
+			// Only parse emoticons at the beginning of the text or if they're preceded by any
+			// one of: a new line, a space, a dot, or a right square bracket
+			$configurator->Emoticons->notAfter = '[^\\n .\\]]';
+
+			// Ignore emoticons that are immediately followed by a "word" character
+			$configurator->Emoticons->notBefore = '\\w';
+		}
+
+		// Load the censored words
+		$censor = $this->data_access->get_censored_words();
+		if (!empty($censor))
+		{
+			// Use a namespaced tag to avoid collisions
+			$configurator->plugins->load('Censor', array('tagName' => 'censor:tag'));
+			foreach ($censor as $row)
+			{
+				$configurator->Censor->add($row['word'], $row['replacement']);
+			}
+		}
+
+		// Load the magic links plugins. We do that after BBCodes so that they use the same tags
+		$this->configure_autolink($configurator);
+
+		// Register some vars with a default value. Those should be set at runtime by whatever calls
+		// the parser
+		$configurator->registeredVars['max_font_size'] = 0;
+		$configurator->registeredVars['max_img_height'] = 0;
+		$configurator->registeredVars['max_img_width'] = 0;
+
+		// Load the Emoji plugin and modify its tag's template to obey viewsmilies
+		$tag = $configurator->Emoji->getTag();
+		$tag->template = '<xsl:choose>
+			<xsl:when test="@tseq">
+				<img alt="{.}" class="emoji" draggable="false" src="//twemoji.maxcdn.com/2/svg/{@tseq}.svg"/>
+			</xsl:when>
+			<xsl:otherwise>
+				<img alt="{.}" class="emoji" draggable="false" src="https://cdn.jsdelivr.net/gh/s9e/emoji-assets-twemoji@11.2/dist/svgz/{@seq}.svgz"/>
+			</xsl:otherwise>
+		</xsl:choose>';
+		$tag->template = '<xsl:choose><xsl:when test="$S_VIEWSMILIES">' . str_replace('class="emoji"', 'class="emoji smilies"', $tag->template) . '</xsl:when><xsl:otherwise><xsl:value-of select="."/></xsl:otherwise></xsl:choose>';
+
+		/**
+		* Modify the s9e\TextFormatter configurator after the default settings are set
+		*
+		* @event core.text_formatter_s9e_configure_after
+		* @var \s9e\TextFormatter\Configurator configurator Configurator instance
+		* @since 3.2.0-a1
+		*/
+		$vars = array('configurator');
+		extract($this->dispatcher->trigger_event('core.text_formatter_s9e_configure_after', compact($vars)));
+
+		return $configurator;
+	}
+
+	/**
+	* Regenerate and cache a new parser and renderer
+	*
+	* @return array Associative array with at least two elements: "parser" and "renderer"
+	*/
+	public function regenerate()
+	{
+		$configurator = $this->get_configurator();
+
+		// Get the censor helper and remove the Censor plugin if applicable
+		if (isset($configurator->Censor))
+		{
+			$censor = $configurator->Censor->getHelper();
+			unset($configurator->Censor);
+			unset($configurator->tags['censor:tag']);
+		}
+
+		$objects = $configurator->finalize();
+
+		/**
+		* Access the objects returned by finalize() before they are saved to cache
+		*
+		* @event core.text_formatter_s9e_configure_finalize
+		* @var array objects Array containing a "parser" object, a "renderer" object and optionally a "js" string
+		* @since 3.2.2-RC1
+		*/
+		$vars = array('objects');
+		extract($this->dispatcher->trigger_event('core.text_formatter_s9e_configure_finalize', compact($vars)));
+
+		$parser   = $objects['parser'];
+		$renderer = $objects['renderer'];
+
+		// Cache the parser as-is
+		$this->cache->put($this->cache_key_parser, $parser);
+
+		// We need to cache the name of the renderer's generated class
+		$renderer_data = array('class' => get_class($renderer));
+		if (isset($censor))
+		{
+			$renderer_data['censor'] = $censor;
+		}
+		$this->cache->put($this->cache_key_renderer, $renderer_data);
+
+		return array('parser' => $parser, 'renderer' => $renderer);
+	}
+
+	/**
+	* Add a BBCode to given configurator
+	*
+	* @param  Configurator $configurator
+	* @param  string       $usage
+	* @param  string       $template
+	* @return void
+	*/
+	protected function add_bbcode(Configurator $configurator, $usage, $template)
+	{
+		try
+		{
+			$configurator->BBCodes->addCustom($usage, new UnsafeTemplate($template));
+		}
+		catch (\Exception $e)
+		{
+			$this->log->add('critical', null, null, 'LOG_BBCODE_CONFIGURATION_ERROR', false, [$usage, $e->getMessage()]);
+		}
+	}
+
+	/**
+	* Configure the Autolink / Autoemail plugins used to linkify text
+	*
+	* @param  \s9e\TextFormatter\Configurator $configurator
+	* @return void
+	*/
+	protected function configure_autolink(Configurator $configurator)
+	{
+		$configurator->plugins->load('Autoemail');
+		$configurator->plugins->load('Autolink', array('matchWww' => true));
+
+		// Add a tag filter that creates a tag that stores and replace the
+		// content of a link created by the Autolink plugin
+		$configurator->Autolink->getTag()->filterChain
+			->add(array($this->link_helper, 'generate_link_text_tag'))
+			->resetParameters()
+			->addParameterByName('tag')
+			->addParameterByName('parser');
+
+		// Create a tag that will be used to display the truncated text by
+		// replacing the original content with the content of the @text attribute
+		$tag = $configurator->tags->add('LINK_TEXT');
+		$tag->attributes->add('text');
+		$tag->template = '<xsl:value-of select="@text"/>';
+
+		$tag->filterChain
+			->add(array($this->link_helper, 'truncate_local_url'))
+			->resetParameters()
+			->addParameterByName('tag')
+			->addParameterByValue(generate_board_url() . '/');
+		$tag->filterChain
+			->add(array($this->link_helper, 'truncate_text'))
+			->resetParameters()
+			->addParameterByName('tag');
+		$tag->filterChain
+			->add(array($this->link_helper, 'cleanup_tag'))
+			->resetParameters()
+			->addParameterByName('tag')
+			->addParameterByName('parser');
+	}
+
+	/**
+	* Escape a literal to be used in an HTML attribute in an XSL template
+	*
+	* Escapes "HTML special chars" for obvious reasons and curly braces to avoid them
+	* being interpreted as an attribute value template
+	*
+	* @param  string $value Original string
+	* @return string        Escaped string
+	*/
+	protected function escape_html_attribute($value)
+	{
+		return htmlspecialchars(strtr($value, ['{' => '{{', '}' => '}}']), ENT_COMPAT | ENT_XML1, 'UTF-8');
+	}
+
+	/**
+	* Return the default BBCodes configuration
+	*
+	* @return array 2D array. Each element has a 'usage' key, a 'template' key, and an optional 'options' key
+	*/
+	protected function get_default_bbcodes($configurator)
+	{
+		// For each BBCode, build an associative array matching style_ids to their template
+		$templates = array();
+		foreach ($this->data_access->get_styles_templates() as $style_id => $data)
+		{
+			foreach ($this->extract_templates($data['template']) as $bbcode_name => $template)
+			{
+				$templates[$bbcode_name][$style_id] = $template;
+			}
+
+			// Add default templates wherever missing, or for BBCodes that were not specified in
+			// this template's bitfield. For instance, prosilver has a custom template for b but its
+			// bitfield does not enable it so the default template is used instead
+			foreach ($this->default_templates as $bbcode_name => $template)
+			{
+				if (!isset($templates[$bbcode_name][$style_id]) || !in_array($bbcode_name, $data['bbcodes'], true))
+				{
+					$templates[$bbcode_name][$style_id] = $template;
+				}
+			}
+		}
+
+		// Replace custom tokens and normalize templates
+		foreach ($templates as $bbcode_name => $style_templates)
+		{
+			foreach ($style_templates as $i => $template)
+			{
+				if (isset($this->custom_tokens[$bbcode_name]))
+				{
+					$template = strtr($template, $this->custom_tokens[$bbcode_name]);
+				}
+
+				$templates[$bbcode_name][$i] = $configurator->templateNormalizer->normalizeTemplate($template);
+			}
+		}
+
+		$bbcodes = array();
+		foreach ($this->default_definitions as $bbcode_name => $usage)
+		{
+			$bbcodes[$bbcode_name] = array(
+				'usage'    => $usage,
+				'template' => $this->merge_templates($templates[$bbcode_name]),
+			);
+		}
+
+		return $bbcodes;
+	}
+
+	/**
+	* Extract and recompose individual BBCode templates from a style's template file
+	*
+	* @param  string $template Style template (bbcode.html)
+	* @return array Associative array matching BBCode names to their template
+	*/
+	protected function extract_templates($template)
+	{
+		// Capture the template fragments
+		// Allow either phpBB template or the Twig syntax
+		preg_match_all('#<!-- BEGIN (.*?) -->(.*?)<!-- END .*? -->#s', $template, $matches, PREG_SET_ORDER) ?:
+			preg_match_all('#{% for (.*?) in .*? %}(.*?){% endfor %}#s', $template, $matches, PREG_SET_ORDER);
+
+		$fragments = array();
+		foreach ($matches as $match)
+		{
+			// Normalize the whitespace
+			$fragment = preg_replace('#>\\n\\t*<#', '><', trim($match[2]));
+
+			$fragments[$match[1]] = $fragment;
+		}
+
+		// Automatically recompose templates split between *_open and *_close
+		foreach ($fragments as $fragment_name => $fragment)
+		{
+			if (preg_match('#^(\\w+)_close$#', $fragment_name, $match))
+			{
+				$bbcode_name = $match[1];
+
+				if (isset($fragments[$bbcode_name . '_open']))
+				{
+					$templates[$bbcode_name] = $fragments[$bbcode_name . '_open'] . '<xsl:apply-templates/>' . $fragment;
+				}
+			}
+		}
+
+		// Manually recompose and overwrite irregular templates
+		$templates['list'] =
+			'<xsl:choose>
+				<xsl:when test="not(@type)">
+					' . $fragments['ulist_open_default'] . '<xsl:apply-templates/>' . $fragments['ulist_close'] . '
+				</xsl:when>
+				<xsl:when test="contains(\'upperlowerdecim\',substring(@type,1,5))">
+					' . $fragments['olist_open'] . '<xsl:apply-templates/>' . $fragments['olist_close'] . '
+				</xsl:when>
+				<xsl:otherwise>
+					' . $fragments['ulist_open'] . '<xsl:apply-templates/>' . $fragments['ulist_close'] . '
+				</xsl:otherwise>
+			</xsl:choose>';
+
+		$templates['li'] = $fragments['listitem'] . '<xsl:apply-templates/>' . $fragments['listitem_close'];
+
+		// Replace the regular quote template with the extended quote template if available
+		if (isset($fragments['quote_extended']))
+		{
+			$templates['quote'] = $fragments['quote_extended'];
+		}
+
+		// The [attachment] BBCode uses the inline_attachment template to output a comment that
+		// is post-processed by parse_attachments()
+		$templates['attachment'] = $fragments['inline_attachment_open'] . '<xsl:comment> ia<xsl:value-of select="@index"/> </xsl:comment><xsl:value-of select="@filename"/><xsl:comment> ia<xsl:value-of select="@index"/> </xsl:comment>' . $fragments['inline_attachment_close'];
+
+		// Add fragments as templates
+		foreach ($fragments as $fragment_name => $fragment)
+		{
+			if (preg_match('#^\\w+$#', $fragment_name))
+			{
+				$templates[$fragment_name] = $fragment;
+			}
+		}
+
+		// Keep only templates that are named after an existing BBCode
+		$templates = array_intersect_key($templates, $this->default_definitions);
+
+		return $templates;
+	}
+
+	/**
+	* Merge the templates from any number of styles into one BBCode template
+	*
+	* When multiple templates are available for the same BBCode (because of multiple styles) we
+	* merge them into a single template that uses an xsl:choose construct that determines which
+	* style to use at rendering time.
+	*
+	* @param  array  $style_templates Associative array matching style_ids to their template
+	* @return string
+	*/
+	protected function merge_templates(array $style_templates)
+	{
+		// Return the template as-is if there's only one style or all styles share the same template
+		if (count(array_unique($style_templates)) === 1)
+		{
+			return end($style_templates);
+		}
+
+		// Group identical templates together
+		$grouped_templates = array();
+		foreach ($style_templates as $style_id => $style_template)
+		{
+			$grouped_templates[$style_template][] = '$STYLE_ID=' . $style_id;
+		}
+
+		// Sort templates by frequency descending
+		$templates_cnt = array_map('sizeof', $grouped_templates);
+		array_multisort($grouped_templates, $templates_cnt);
+
+		// Remove the most frequent template from the list; It becomes the default
+		reset($grouped_templates);
+		$default_template = key($grouped_templates);
+		unset($grouped_templates[$default_template]);
+
+		// Build an xsl:choose switch
+		$template = '<xsl:choose>';
+		foreach ($grouped_templates as $style_template => $exprs)
+		{
+			$template .= '<xsl:when test="' . implode(' or ', $exprs) . '">' . $style_template . '</xsl:when>';
+		}
+		$template .= '<xsl:otherwise>' . $default_template . '</xsl:otherwise></xsl:choose>';
+
+		return $template;
+	}
+}
diff --git a/phpBB/phpbb/textformatter/s9e/link_helper.php b/phpBB/phpbb/textformatter/s9e/link_helper.php
new file mode 100644
index 0000000000..1cd5dd2fa7
--- /dev/null
+++ b/phpBB/phpbb/textformatter/s9e/link_helper.php
@@ -0,0 +1,115 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\textformatter\s9e;
+
+class link_helper
+{
+	/**
+	* Clean up and invalidate a LINK_TEXT tag if applicable
+	*
+	* Will invalidate the tag if its replacement text is the same as the original
+	* text and would have no visible effect
+	*
+	* @param  \s9e\TextFormatter\Parser\Tag $tag    LINK_TEXT tag
+	* @param  \s9e\TextFormatter\Parser     $parser Parser
+	* @return void
+	*/
+	public function cleanup_tag(\s9e\TextFormatter\Parser\Tag $tag, \s9e\TextFormatter\Parser $parser)
+	{
+		// Invalidate if the content of the tag matches the text attribute
+		$text = substr($parser->getText(), $tag->getPos(), $tag->getLen());
+		if ($text === $tag->getAttribute('text'))
+		{
+			$tag->invalidate();
+		}
+	}
+
+	/**
+	* Create a LINK_TEXT tag inside of a link
+	*
+	* Meant to only apply to linkified URLs and [url] BBCodes without a parameter
+	*
+	* @param  \s9e\TextFormatter\Parser\Tag $tag    URL tag (start tag)
+	* @param  \s9e\TextFormatter\Parser     $parser Parser
+	* @return void
+	*/
+	public function generate_link_text_tag(\s9e\TextFormatter\Parser\Tag $tag, \s9e\TextFormatter\Parser $parser)
+	{
+		// Only create a LINK_TEXT tag if the start tag is paired with an end
+		// tag, which is the case with tags from the Autolink plugins and with
+		// the [url] BBCode when its content is used for the URL
+		if (!$tag->getEndTag() || !$this->should_shorten($tag, $parser->getText()))
+		{
+			return;
+		}
+
+		// Capture the text between the start tag and its end tag
+		$start  = $tag->getPos() + $tag->getLen();
+		$end    = $tag->getEndTag()->getPos();
+		$length = $end - $start;
+		$text   = substr($parser->getText(), $start, $length);
+
+		// Create a tag that consumes the link's text and make it depends on this tag
+		$link_text_tag = $parser->addSelfClosingTag('LINK_TEXT', $start, $length, 10);
+		$link_text_tag->setAttribute('text', $text);
+		$tag->cascadeInvalidationTo($link_text_tag);
+	}
+
+	/**
+	* Test whether we should shorten this tag's text
+	*
+	* Will test whether the tag either does not use any markup or uses a single
+	* [url] BBCode
+	*
+	* @param  \s9e\TextFormatter\Parser\Tag $tag  URL tag
+	* @param  string                        $text Original text
+	* @return bool
+	*/
+	protected function should_shorten(\s9e\TextFormatter\Parser\Tag $tag, $text)
+	{
+		return ($tag->getLen() === 0 || strtolower(substr($text, $tag->getPos(), $tag->getLen())) === '[url]');
+	}
+
+	/**
+	* Remove the board's root URL from a the start of a string
+	*
+	* @param  \s9e\TextFormatter\Parser\Tag $tag       LINK_TEXT tag
+	* @param  string                        $board_url Forum's root URL (with trailing slash)
+	* @return void
+	*/
+	public function truncate_local_url(\s9e\TextFormatter\Parser\Tag $tag, $board_url)
+	{
+		$text = $tag->getAttribute('text');
+		if (stripos($text, $board_url) === 0 && strlen($text) > strlen($board_url))
+		{
+			$tag->setAttribute('text', substr($text, strlen($board_url)));
+		}
+	}
+
+	/**
+	* Truncate the replacement text set in a LINK_TEXT tag
+	*
+	* @param  \s9e\TextFormatter\Parser\Tag $tag LINK_TEXT tag
+	* @return void
+	*/
+	public function truncate_text(\s9e\TextFormatter\Parser\Tag $tag)
+	{
+		$text = $tag->getAttribute('text');
+		if (utf8_strlen($text) > 55)
+		{
+			$text = utf8_substr($text, 0, 39) . ' ... ' . utf8_substr($text, -10);
+			$tag->setAttribute('text', $text);
+		}
+	}
+}
diff --git a/phpBB/phpbb/textformatter/s9e/parser.php b/phpBB/phpbb/textformatter/s9e/parser.php
new file mode 100644
index 0000000000..f7e4668980
--- /dev/null
+++ b/phpBB/phpbb/textformatter/s9e/parser.php
@@ -0,0 +1,417 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\textformatter\s9e;
+
+use s9e\TextFormatter\Parser\AttributeFilters\UrlFilter;
+use s9e\TextFormatter\Parser\Logger;
+use s9e\TextFormatter\Parser\Tag;
+
+/**
+* s9e\TextFormatter\Parser adapter
+*/
+class parser implements \phpbb\textformatter\parser_interface
+{
+	/**
+	* @var \phpbb\event\dispatcher_interface
+	*/
+	protected $dispatcher;
+
+	/**
+	* @var \s9e\TextFormatter\Parser
+	*/
+	protected $parser;
+
+	/**
+	* Constructor
+	*
+	* @param \phpbb\cache\driver_interface $cache
+	* @param string $key Cache key
+	* @param factory $factory
+	* @param \phpbb\event\dispatcher_interface $dispatcher
+	*/
+	public function __construct(\phpbb\cache\driver\driver_interface $cache, $key, factory $factory, \phpbb\event\dispatcher_interface $dispatcher)
+	{
+		$parser = $cache->get($key);
+		if (!$parser)
+		{
+			$objects = $factory->regenerate();
+			$parser  = $objects['parser'];
+		}
+
+		$this->dispatcher = $dispatcher;
+		$this->parser = $parser;
+
+		$parser = $this;
+
+		/**
+		* Configure the parser service
+		*
+		* Can be used to:
+		*  - toggle features or BBCodes
+		*  - register variables or custom parsers in the s9e\TextFormatter parser
+		*  - configure the s9e\TextFormatter parser's runtime settings
+		*
+		* @event core.text_formatter_s9e_parser_setup
+		* @var \phpbb\textformatter\s9e\parser parser This parser service
+		* @since 3.2.0-a1
+		*/
+		$vars = array('parser');
+		extract($dispatcher->trigger_event('core.text_formatter_s9e_parser_setup', compact($vars)));
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function parse($text)
+	{
+		$parser = $this;
+
+		/**
+		* Modify a text before it is parsed
+		*
+		* @event core.text_formatter_s9e_parse_before
+		* @var \phpbb\textformatter\s9e\parser parser This parser service
+		* @var string text The original text
+		* @since 3.2.0-a1
+		*/
+		$vars = array('parser', 'text');
+		extract($this->dispatcher->trigger_event('core.text_formatter_s9e_parse_before', compact($vars)));
+
+		$xml = $this->parser->parse($text);
+
+		/**
+		* Modify a parsed text in its XML form
+		*
+		* @event core.text_formatter_s9e_parse_after
+		* @var \phpbb\textformatter\s9e\parser parser This parser service
+		* @var string xml The parsed text, in XML
+		* @since 3.2.0-a1
+		*/
+		$vars = array('parser', 'xml');
+		extract($this->dispatcher->trigger_event('core.text_formatter_s9e_parse_after', compact($vars)));
+
+		return $xml;
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function disable_bbcode($name)
+	{
+		$this->parser->disableTag(strtoupper($name));
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function disable_bbcodes()
+	{
+		$this->parser->disablePlugin('BBCodes');
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function disable_censor()
+	{
+		$this->parser->disablePlugin('Censor');
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function disable_magic_url()
+	{
+		$this->parser->disablePlugin('Autoemail');
+		$this->parser->disablePlugin('Autolink');
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function disable_smilies()
+	{
+		$this->parser->disablePlugin('Emoticons');
+		$this->parser->disablePlugin('Emoji');
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function enable_bbcode($name)
+	{
+		$this->parser->enableTag(strtoupper($name));
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function enable_bbcodes()
+	{
+		$this->parser->enablePlugin('BBCodes');
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function enable_censor()
+	{
+		$this->parser->enablePlugin('Censor');
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function enable_magic_url()
+	{
+		$this->parser->enablePlugin('Autoemail');
+		$this->parser->enablePlugin('Autolink');
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function enable_smilies()
+	{
+		$this->parser->enablePlugin('Emoticons');
+		$this->parser->enablePlugin('Emoji');
+	}
+
+	/**
+	* {@inheritdoc}
+	*
+	* This will convert the log entries found in s9e\TextFormatter's logger into phpBB error
+	* messages
+	*/
+	public function get_errors()
+	{
+		$errors = array();
+		foreach ($this->parser->getLogger()->getLogs() as $entry)
+		{
+			list(, $msg, $context) = $entry;
+
+			if ($msg === 'Tag limit exceeded')
+			{
+				if ($context['tagName'] === 'E')
+				{
+					$errors[] = array('TOO_MANY_SMILIES', $context['tagLimit']);
+				}
+				else if ($context['tagName'] === 'URL')
+				{
+					$errors[] = array('TOO_MANY_URLS', $context['tagLimit']);
+				}
+			}
+			else if ($msg === 'MAX_FONT_SIZE_EXCEEDED')
+			{
+				$errors[] = array($msg, $context['max_size']);
+			}
+			else if (preg_match('/^MAX_(?:FLASH|IMG)_(HEIGHT|WIDTH)_EXCEEDED$/D', $msg, $m))
+			{
+				$errors[] = array($msg, $context['max_' . strtolower($m[1])]);
+			}
+			else if ($msg === 'Tag is disabled' && $this->is_a_bbcode($context['tag']))
+			{
+				$name = strtolower($context['tag']->getName());
+				$errors[] = array('UNAUTHORISED_BBCODE', '[' . $name . ']');
+			}
+			else if ($msg === 'UNABLE_GET_IMAGE_SIZE')
+			{
+				$errors[] = array($msg);
+			}
+		}
+
+		// Deduplicate error messages. array_unique() only works on strings so we have to serialize
+		if (!empty($errors))
+		{
+			$errors = array_map('unserialize', array_unique(array_map('serialize', $errors)));
+		}
+
+		return $errors;
+	}
+
+	/**
+	* Return the instance of s9e\TextFormatter\Parser used by this object
+	*
+	* @return \s9e\TextFormatter\Parser
+	*/
+	public function get_parser()
+	{
+		return $this->parser;
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function set_var($name, $value)
+	{
+		if ($name === 'max_smilies')
+		{
+			$this->parser->setTagLimit('E', $value ?: PHP_INT_MAX);
+		}
+		else if ($name === 'max_urls')
+		{
+			$this->parser->setTagLimit('URL', $value ?: PHP_INT_MAX);
+		}
+		else
+		{
+			$this->parser->registeredVars[$name] = $value;
+		}
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function set_vars(array $vars)
+	{
+		foreach ($vars as $name => $value)
+		{
+			$this->set_var($name, $value);
+		}
+	}
+
+	/**
+	* Filter a flash object's height
+	*
+	* @see bbcode_firstpass::bbcode_flash()
+	*
+	* @param  string  $height
+	* @param  integer $max_height
+	* @param  Logger  $logger
+	* @return mixed              Original value if valid, FALSE otherwise
+	*/
+	static public function filter_flash_height($height, $max_height, Logger $logger)
+	{
+		if ($max_height && $height > $max_height)
+		{
+			$logger->err('MAX_FLASH_HEIGHT_EXCEEDED', array('max_height' => $max_height));
+
+			return false;
+		}
+
+		return $height;
+	}
+
+	/**
+	* Filter a flash object's width
+	*
+	* @see bbcode_firstpass::bbcode_flash()
+	*
+	* @param  string  $width
+	* @param  integer $max_width
+	* @param  Logger  $logger
+	* @return mixed              Original value if valid, FALSE otherwise
+	*/
+	static public function filter_flash_width($width, $max_width, Logger $logger)
+	{
+		if ($max_width && $width > $max_width)
+		{
+			$logger->err('MAX_FLASH_WIDTH_EXCEEDED', array('max_width' => $max_width));
+
+			return false;
+		}
+
+		return $width;
+	}
+
+	/**
+	* Filter the value used in a [size] BBCode
+	*
+	* @see bbcode_firstpass::bbcode_size()
+	*
+	* @param  string  $size     Original size
+	* @param  integer $max_size Maximum allowed size
+	* @param  Logger  $logger
+	* @return mixed             Original value if valid, FALSE otherwise
+	*/
+	static public function filter_font_size($size, $max_size, Logger $logger)
+	{
+		if ($max_size && $size > $max_size)
+		{
+			$logger->err('MAX_FONT_SIZE_EXCEEDED', array('max_size' => $max_size));
+
+			return false;
+		}
+
+		if ($size < 1 || !is_numeric($size))
+		{
+			return false;
+		}
+
+		return $size;
+	}
+
+	/**
+	* Filter an image's URL to enforce restrictions on its dimensions
+	*
+	* @see bbcode_firstpass::bbcode_img()
+	*
+	* @param  string  $url        Original URL
+	* @param  array   $url_config Config used by the URL filter
+	* @param  Logger  $logger
+	* @param  integer $max_height Maximum height allowed
+	* @param  integer $max_width  Maximum width allowed
+	* @return string|bool         Original value if valid, FALSE otherwise
+	*/
+	static public function filter_img_url($url, array $url_config, Logger $logger, $max_height, $max_width)
+	{
+		// Validate the URL
+		$url = UrlFilter::filter($url, $url_config, $logger);
+		if ($url === false)
+		{
+			return false;
+		}
+
+		if ($max_height || $max_width)
+		{
+			$imagesize = new \FastImageSize\FastImageSize();
+			$size_info = $imagesize->getImageSize($url);
+			if ($size_info === false)
+			{
+				$logger->err('UNABLE_GET_IMAGE_SIZE');
+				return false;
+			}
+
+			if ($max_height && $max_height < $size_info['height'])
+			{
+				$logger->err('MAX_IMG_HEIGHT_EXCEEDED', array('max_height' => $max_height));
+				return false;
+			}
+
+			if ($max_width && $max_width < $size_info['width'])
+			{
+				$logger->err('MAX_IMG_WIDTH_EXCEEDED', array('max_width' => $max_width));
+				return false;
+			}
+		}
+
+		return $url;
+	}
+
+	/**
+	* Test whether given tag consumes text that looks like BBCode-styled markup
+	*
+	* @param  Tag  $tag Original tag
+	* @return bool
+	*/
+	protected function is_a_bbcode(Tag $tag)
+	{
+		if ($tag->getLen() < 3)
+		{
+			return false;
+		}
+		$markup = substr($this->parser->getText(), $tag->getPos(), $tag->getLen());
+
+		return (bool) preg_match('(^\\[\\w++.*?\\]$)s', $markup);
+	}
+}
diff --git a/phpBB/phpbb/textformatter/s9e/quote_helper.php b/phpBB/phpbb/textformatter/s9e/quote_helper.php
new file mode 100644
index 0000000000..3011ec88dc
--- /dev/null
+++ b/phpBB/phpbb/textformatter/s9e/quote_helper.php
@@ -0,0 +1,87 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\textformatter\s9e;
+
+class quote_helper
+{
+	/**
+	* @var string Base URL for a post link, uses {POST_ID} as placeholder
+	*/
+	protected $post_url;
+
+	/**
+	* @var string Base URL for a private message link, uses {MSG_ID} as placeholder
+	*/
+	protected $msg_url;
+
+	/**
+	* @var string Base URL for a profile link, uses {USER_ID} as placeholder
+	*/
+	protected $profile_url;
+
+	/**
+	* @var \phpbb\user
+	*/
+	protected $user;
+
+	/**
+	* Constructor
+	*
+	* @param \phpbb\user $user
+	* @param string $root_path
+	* @param string $php_ext
+	*/
+	public function __construct(\phpbb\user $user, $root_path, $php_ext)
+	{
+		$this->post_url = append_sid($root_path . 'viewtopic.' . $php_ext, 'p={POST_ID}#p{POST_ID}', false);
+		$this->msg_url = append_sid($root_path . 'ucp.' . $php_ext, 'i=pm&mode=view&p={MSG_ID}', false);
+		$this->profile_url = append_sid($root_path . 'memberlist.' . $php_ext, 'mode=viewprofile&u={USER_ID}', false);
+		$this->user = $user;
+	}
+
+	/**
+	* Inject dynamic metadata into QUOTE tags in given XML
+	*
+	* @param  string $xml Original XML
+	* @return string      Modified XML
+	*/
+	public function inject_metadata($xml)
+	{
+		return \s9e\TextFormatter\Utils::replaceAttributes(
+			$xml,
+			'QUOTE',
+			function ($attributes)
+			{
+				if (isset($attributes['post_id']))
+				{
+					$attributes['post_url'] = str_replace('{POST_ID}', $attributes['post_id'], $this->post_url);
+				}
+				if (isset($attributes['msg_id']))
+				{
+					$attributes['msg_url'] = str_replace('{MSG_ID}', $attributes['msg_id'], $this->msg_url);
+				}
+				if (isset($attributes['time']))
+				{
+					$attributes['date'] = $this->user->format_date($attributes['time']);
+				}
+				if (isset($attributes['user_id']))
+				{
+					$attributes['profile_url'] = str_replace('{USER_ID}', $attributes['user_id'], $this->profile_url);
+				}
+
+				return $attributes;
+			}
+		);
+	}
+}
diff --git a/phpBB/phpbb/textformatter/s9e/renderer.php b/phpBB/phpbb/textformatter/s9e/renderer.php
new file mode 100644
index 0000000000..6fcd2b0a98
--- /dev/null
+++ b/phpBB/phpbb/textformatter/s9e/renderer.php
@@ -0,0 +1,313 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\textformatter\s9e;
+
+/**
+* s9e\TextFormatter\Renderer adapter
+*/
+class renderer implements \phpbb\textformatter\renderer_interface
+{
+	/**
+	* @var \s9e\TextFormatter\Plugins\Censor\Helper
+	*/
+	protected $censor;
+
+	/**
+	* @var \phpbb\event\dispatcher_interface
+	*/
+	protected $dispatcher;
+
+	/**
+	* @var quote_helper
+	*/
+	protected $quote_helper;
+
+	/**
+	* @var \s9e\TextFormatter\Renderer
+	*/
+	protected $renderer;
+
+	/**
+	* @var bool Status of the viewcensors option
+	*/
+	protected $viewcensors = false;
+
+	/**
+	* @var bool Status of the viewflash option
+	*/
+	protected $viewflash = false;
+
+	/**
+	* @var bool Status of the viewimg option
+	*/
+	protected $viewimg = false;
+
+	/**
+	* @var bool Status of the viewsmilies option
+	*/
+	protected $viewsmilies = false;
+
+	/**
+	* Constructor
+	*
+	* @param \phpbb\cache\driver\driver_interface $cache
+	* @param string $cache_dir Path to the cache dir
+	* @param string $key Cache key
+	* @param factory $factory
+	* @param \phpbb\event\dispatcher_interface $dispatcher
+	*/
+	public function __construct(\phpbb\cache\driver\driver_interface $cache, $cache_dir, $key, factory $factory, \phpbb\event\dispatcher_interface $dispatcher)
+	{
+		$renderer_data = $cache->get($key);
+		if ($renderer_data)
+		{
+			$class = $renderer_data['class'];
+			if (!class_exists($class, false))
+			{
+				// Try to load the renderer class from its cache file
+				$cache_file = $cache_dir . $class . '.php';
+
+				if (file_exists($cache_file))
+				{
+					include($cache_file);
+				}
+			}
+			if (class_exists($class, false))
+			{
+				$renderer = new $class;
+			}
+			if (isset($renderer_data['censor']))
+			{
+				$censor = $renderer_data['censor'];
+			}
+		}
+		if (!isset($renderer))
+		{
+			$objects  = $factory->regenerate();
+			$renderer = $objects['renderer'];
+		}
+
+		if (isset($censor))
+		{
+			$this->censor = $censor;
+		}
+		$this->dispatcher = $dispatcher;
+		$this->renderer = $renderer;
+		$renderer = $this;
+
+		/**
+		* Configure the renderer service
+		*
+		* @event core.text_formatter_s9e_renderer_setup
+		* @var \phpbb\textformatter\s9e\renderer renderer This renderer service
+		* @since 3.2.0-a1
+		*/
+		$vars = array('renderer');
+		extract($dispatcher->trigger_event('core.text_formatter_s9e_renderer_setup', compact($vars)));
+	}
+
+	/**
+	* Configure the quote_helper object used to display extended information in quotes
+	*
+	* @param  quote_helper $quote_helper
+	*/
+	public function configure_quote_helper(quote_helper $quote_helper)
+	{
+		$this->quote_helper = $quote_helper;
+	}
+
+	/**
+	* Automatically set the smilies path based on config
+	*
+	* @param  \phpbb\config\config $config
+	* @param  \phpbb\path_helper   $path_helper
+	* @return null
+	*/
+	public function configure_smilies_path(\phpbb\config\config $config, \phpbb\path_helper $path_helper)
+	{
+		/**
+		* @see smiley_text()
+		*/
+		$root_path = (defined('PHPBB_USE_BOARD_URL_PATH') && PHPBB_USE_BOARD_URL_PATH) ? generate_board_url() . '/' : $path_helper->get_web_root_path();
+
+		$this->set_smilies_path($root_path . $config['smilies_path']);
+	}
+
+	/**
+	* Configure this renderer as per the user's settings
+	*
+	* Should set the locale as well as the viewcensor/viewflash/viewimg/viewsmilies options.
+	*
+	* @param  \phpbb\user          $user
+	* @param  \phpbb\config\config $config
+	* @param  \phpbb\auth\auth     $auth
+	* @return null
+	*/
+	public function configure_user(\phpbb\user $user, \phpbb\config\config $config, \phpbb\auth\auth $auth)
+	{
+		$censor = $user->optionget('viewcensors') || !$config['allow_nocensors'] || !$auth->acl_get('u_chgcensors');
+
+		$this->set_viewcensors($censor);
+		$this->set_viewflash($user->optionget('viewflash'));
+		$this->set_viewimg($user->optionget('viewimg'));
+		$this->set_viewsmilies($user->optionget('viewsmilies'));
+
+		// Set the stylesheet parameters
+		foreach (array_keys($this->renderer->getParameters()) as $param_name)
+		{
+			if (strpos($param_name, 'L_') === 0)
+			{
+				// L_FOO is set to $user->lang('FOO')
+				$this->renderer->setParameter($param_name, $user->lang(substr($param_name, 2)));
+			}
+		}
+
+		// Set this user's style id and other parameters
+		$this->renderer->setParameters(array(
+			'S_IS_BOT'          => $user->data['is_bot'],
+			'S_REGISTERED_USER' => $user->data['is_registered'],
+			'S_USER_LOGGED_IN'  => ($user->data['user_id'] != ANONYMOUS),
+			'STYLE_ID'          => $user->style['style_id'],
+		));
+	}
+
+	/**
+	* Return the instance of s9e\TextFormatter\Renderer used by this object
+	*
+	* @return \s9e\TextFormatter\Renderer
+	*/
+	public function get_renderer()
+	{
+		return $this->renderer;
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function get_viewcensors()
+	{
+		return $this->viewcensors;
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function get_viewflash()
+	{
+		return $this->viewflash;
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function get_viewimg()
+	{
+		return $this->viewimg;
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function get_viewsmilies()
+	{
+		return $this->viewsmilies;
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function render($xml)
+	{
+		if (isset($this->quote_helper))
+		{
+			$xml = $this->quote_helper->inject_metadata($xml);
+		}
+
+		$renderer = $this;
+
+		/**
+		* Modify a parsed text before it is rendered
+		*
+		* @event core.text_formatter_s9e_render_before
+		* @var \phpbb\textformatter\s9e\renderer renderer This renderer service
+		* @var string xml The parsed text, in its XML form
+		* @since 3.2.0-a1
+		*/
+		$vars = array('renderer', 'xml');
+		extract($this->dispatcher->trigger_event('core.text_formatter_s9e_render_before', compact($vars)));
+
+		$html = $this->renderer->render($xml);
+		if (isset($this->censor) && $this->viewcensors)
+		{
+			$html = $this->censor->censorHtml($html, true);
+		}
+
+		/**
+		* Modify a rendered text
+		*
+		* @event core.text_formatter_s9e_render_after
+		* @var string html The rendered text's HTML
+		* @var \phpbb\textformatter\s9e\renderer renderer This renderer service
+		* @since 3.2.0-a1
+		*/
+		$vars = array('html', 'renderer');
+		extract($this->dispatcher->trigger_event('core.text_formatter_s9e_render_after', compact($vars)));
+
+		return $html;
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function set_smilies_path($path)
+	{
+		$this->renderer->setParameter('T_SMILIES_PATH', $path);
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function set_viewcensors($value)
+	{
+		$this->viewcensors = $value;
+		$this->renderer->setParameter('S_VIEWCENSORS', $value);
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function set_viewflash($value)
+	{
+		$this->viewflash = $value;
+		$this->renderer->setParameter('S_VIEWFLASH', $value);
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function set_viewimg($value)
+	{
+		$this->viewimg = $value;
+		$this->renderer->setParameter('S_VIEWIMG', $value);
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function set_viewsmilies($value)
+	{
+		$this->viewsmilies = $value;
+		$this->renderer->setParameter('S_VIEWSMILIES', $value);
+	}
+}
diff --git a/phpBB/phpbb/textformatter/s9e/utils.php b/phpBB/phpbb/textformatter/s9e/utils.php
new file mode 100644
index 0000000000..a9a6d4b892
--- /dev/null
+++ b/phpBB/phpbb/textformatter/s9e/utils.php
@@ -0,0 +1,152 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\textformatter\s9e;
+
+/**
+* Text manipulation utilities
+*/
+class utils implements \phpbb\textformatter\utils_interface
+{
+	/**
+	* Replace BBCodes and other formatting elements with whitespace
+	*
+	* NOTE: preserves smilies as text
+	*
+	* @param  string $xml Parsed text
+	* @return string      Plain text
+	*/
+	public function clean_formatting($xml)
+	{
+		// Insert a space before <s> and <e> then remove formatting
+		$xml = preg_replace('#<[es]>#', ' $0', $xml);
+
+		return \s9e\TextFormatter\Utils::removeFormatting($xml);
+	}
+
+	/**
+	* Format given string to be used as an attribute value
+	*
+	* Will return the string as-is if it can be used in a BBCode without quotes. Otherwise,
+	* it will use either single- or double- quotes depending on whichever requires less escaping.
+	* Quotes and backslashes are escaped with backslashes where necessary
+	*
+	* @param  string $str Original string
+	* @return string      Same string if possible, escaped string within quotes otherwise
+	*/
+	protected function format_attribute_value($str)
+	{
+		if (!preg_match('/[ "\'\\\\\\]]/', $str))
+		{
+			// Return as-is if it contains none of: space, ' " \ or ]
+			return $str;
+		}
+		$singleQuoted = "'" . addcslashes($str, "\\'") . "'";
+		$doubleQuoted = '"' . addcslashes($str, '\\"') . '"';
+
+		return (strlen($singleQuoted) < strlen($doubleQuoted)) ? $singleQuoted : $doubleQuoted;
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function generate_quote($text, array $attributes = array())
+	{
+		$text = trim($text);
+		$quote = '[quote';
+		if (isset($attributes['author']))
+		{
+			// Add the author as the BBCode's default attribute
+			$quote .= '=' . $this->format_attribute_value($attributes['author']);
+			unset($attributes['author']);
+		}
+
+		if (isset($attributes['user_id']) && $attributes['user_id'] == ANONYMOUS)
+		{
+			unset($attributes['user_id']);
+		}
+
+		ksort($attributes);
+		foreach ($attributes as $name => $value)
+		{
+			$quote .= ' ' . $name . '=' . $this->format_attribute_value($value);
+		}
+		$quote .= ']';
+		$newline = (strlen($quote . $text . '[/quote]') > 80 || strpos($text, "\n") !== false) ? "\n" : '';
+		$quote .= $newline . $text . $newline . '[/quote]';
+
+		return $quote;
+	}
+
+	/**
+	* Get a list of quote authors, limited to the outermost quotes
+	*
+	* @param  string   $xml Parsed text
+	* @return string[]      List of authors
+	*/
+	public function get_outermost_quote_authors($xml)
+	{
+		$authors = array();
+		if (strpos($xml, '<QUOTE ') === false)
+		{
+			return $authors;
+		}
+
+		$dom = new \DOMDocument;
+		$dom->loadXML($xml);
+		$xpath = new \DOMXPath($dom);
+		foreach ($xpath->query('//QUOTE[not(ancestor::QUOTE)]/@author') as $author)
+		{
+			$authors[] = $author->textContent;
+		}
+
+		return $authors;
+	}
+
+	/**
+	* Remove given BBCode and its content, at given nesting depth
+	*
+	* @param  string  $xml         Parsed text
+	* @param  string  $bbcode_name BBCode's name
+	* @param  integer $depth       Minimum nesting depth (number of parents of the same name)
+	* @return string               Parsed text
+	*/
+	public function remove_bbcode($xml, $bbcode_name, $depth = 0)
+	{
+		return \s9e\TextFormatter\Utils::removeTag($xml, strtoupper($bbcode_name), $depth);
+	}
+
+	/**
+	* Return a parsed text to its original form
+	*
+	* @param  string $xml Parsed text
+	* @return string      Original plain text
+	*/
+	public function unparse($xml)
+	{
+		return \s9e\TextFormatter\Unparser::unparse($xml);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function is_empty($text)
+	{
+		if ($text === null || $text === '')
+		{
+			return true;
+		}
+
+		return trim($this->unparse($text)) === '';
+	}
+}
diff --git a/phpBB/phpbb/textformatter/utils_interface.php b/phpBB/phpbb/textformatter/utils_interface.php
new file mode 100644
index 0000000000..4b7392976a
--- /dev/null
+++ b/phpBB/phpbb/textformatter/utils_interface.php
@@ -0,0 +1,79 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\textformatter;
+
+/**
+* Used to manipulate a parsed text
+*/
+interface utils_interface
+{
+	/**
+	* Replace BBCodes and other formatting elements with whitespace
+	*
+	* NOTE: preserves smilies as text
+	*
+	* @param  string $text Parsed text
+	* @return string       Plain text
+	*/
+	public function clean_formatting($text);
+
+	/**
+	* Create a quote block for given text
+	*
+	* Possible attributes:
+	*   - author:  author's name (usually a username)
+	*   - post_id: post_id of the post being quoted
+	*   - user_id: user_id of the user being quoted
+	*   - time:    timestamp of the original message
+	*
+	* @param  string $text       Quote's text
+	* @param  array  $attributes Quote's attributes
+	* @return string             Quote block to be used in a new post/text
+	*/
+	public function generate_quote($text, array $attributes = array());
+
+	/**
+	* Get a list of quote authors, limited to the outermost quotes
+	*
+	* @param  string   $text Parsed text
+	* @return string[]       List of authors
+	*/
+	public function get_outermost_quote_authors($text);
+
+	/**
+	* Remove given BBCode and its content, at given nesting depth
+	*
+	* @param  string  $text        Parsed text
+	* @param  string  $bbcode_name BBCode's name
+	* @param  integer $depth       Minimum nesting depth (number of parents of the same name)
+	* @return string               Parsed text
+	*/
+	public function remove_bbcode($text, $bbcode_name, $depth = 0);
+
+	/**
+	 * Return a parsed text to its original form
+	 *
+	 * @param  string $text Parsed text
+	 * @return string       Original plain text
+	 */
+	public function unparse($text);
+
+	/**
+	 * Return whether or not a parsed text represent an empty text.
+	 *
+	 * @param  string $text Parsed text
+	 * @return bool         Tue if the original text is empty
+	 */
+	public function is_empty($text);
+}
diff --git a/phpBB/phpbb/textreparser/base.php b/phpBB/phpbb/textreparser/base.php
new file mode 100644
index 0000000000..2ee6ea2cb3
--- /dev/null
+++ b/phpBB/phpbb/textreparser/base.php
@@ -0,0 +1,269 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\textreparser;
+
+abstract class base implements reparser_interface
+{
+	/**
+	 * @var string The reparser name
+	 */
+	protected $name;
+
+	/**
+	* @var bool Whether to save changes to the database
+	*/
+	protected $save_changes = true;
+
+	/**
+	* {@inheritdoc}
+	*/
+	abstract public function get_max_id();
+
+	/**
+	* Return all records in given range
+	*
+	* @param  integer $min_id Lower bound
+	* @param  integer $max_id Upper bound
+	* @return array           Array of records
+	*/
+	abstract protected function get_records_by_range($min_id, $max_id);
+
+	/**
+	* {@inheritdoc}
+	*/
+	abstract protected function save_record(array $record);
+
+	/**
+	* Add fields to given record, if applicable
+	*
+	* The enable_* fields are not always saved to the database. Sometimes we need to guess their
+	* original value based on the text content or possibly other fields
+	*
+	* @param  array $record Original record
+	* @return array         Complete record
+	*/
+	protected function add_missing_fields(array $record)
+	{
+		if (!isset($record['enable_bbcode'], $record['enable_smilies'], $record['enable_magic_url']))
+		{
+			if (isset($record['options']))
+			{
+				$record += array(
+					'enable_bbcode'    => (bool) ($record['options'] & OPTION_FLAG_BBCODE),
+					'enable_smilies'   => (bool) ($record['options'] & OPTION_FLAG_SMILIES),
+					'enable_magic_url' => (bool) ($record['options'] & OPTION_FLAG_LINKS),
+				);
+			}
+			else
+			{
+				$record += array(
+					'enable_bbcode'    => $this->guess_bbcodes($record),
+					'enable_smilies'   => $this->guess_smilies($record),
+					'enable_magic_url' => $this->guess_magic_url($record),
+				);
+			}
+		}
+
+		// Those BBCodes are disabled based on context and user permissions and that value is never
+		// stored in the database. Here we test whether they were used in the original text.
+		$bbcodes = array('flash', 'img', 'quote', 'url');
+		foreach ($bbcodes as $bbcode)
+		{
+			$field_name = 'enable_' . $bbcode . '_bbcode';
+			$record[$field_name] = $this->guess_bbcode($record, $bbcode);
+		}
+
+		// Magic URLs are tied to the URL BBCode, that's why if magic URLs are enabled we make sure
+		// that the URL BBCode is also enabled
+		if ($record['enable_magic_url'])
+		{
+			$record['enable_url_bbcode'] = true;
+		}
+
+		return $record;
+	}
+
+	/**
+	 * Returns the name of the reparser
+	 *
+	 * @return string Name of reparser
+	 */
+	public function get_name()
+	{
+		return $this->name;
+	}
+
+	/**
+	 * Sets the name of the reparser
+	 *
+	 * @param string $name The reparser name
+	 */
+	public function set_name($name)
+	{
+		$this->name = $name;
+	}
+
+	/**
+	* Disable saving changes to the database
+	*/
+	public function disable_save()
+	{
+		$this->save_changes = false;
+	}
+
+	/**
+	* Enable saving changes to the database
+	*/
+	public function enable_save()
+	{
+		$this->save_changes = true;
+	}
+
+	/**
+	* Guess whether given BBCode is in use in given record
+	*
+	* @param  array  $record
+	* @param  string $bbcode
+	* @return bool
+	*/
+	protected function guess_bbcode(array $record, $bbcode)
+	{
+		if (!empty($record['bbcode_uid']))
+		{
+			// Look for the closing tag, e.g. [/url]
+			$match = '[/' . $bbcode . ':' . $record['bbcode_uid'];
+			if (strpos($record['text'], $match) !== false)
+			{
+				return true;
+			}
+		}
+
+		if (substr($record['text'], 0, 2) === '<r')
+		{
+			// Look for the closing tag inside of a e element, in an element of the same name, e.g.
+			// <e>[/url]</e></URL>
+			$match = '<e>[/' . $bbcode . ']</e></' . $bbcode . '>';
+			if (stripos($record['text'], $match) !== false)
+			{
+				return true;
+			}
+		}
+
+		return false;
+	}
+
+	/**
+	* Guess whether any BBCode is in use in given record
+	*
+	* @param  array $record
+	* @return bool
+	*/
+	protected function guess_bbcodes(array $record)
+	{
+		if (!empty($record['bbcode_uid']))
+		{
+			// Test whether the bbcode_uid is in use
+			$match = ':' . $record['bbcode_uid'];
+			if (strpos($record['text'], $match) !== false)
+			{
+				return true;
+			}
+		}
+
+		if (substr($record['text'], 0, 2) === '<r')
+		{
+			// Look for a closing tag inside of an e element
+			return (bool) preg_match('(<e>\\[/\\w+\\]</e>)', $match);
+		}
+
+		return false;
+	}
+
+	/**
+	* Guess whether magic URLs are in use in given record
+	*
+	* @param  array $record
+	* @return bool
+	*/
+	protected function guess_magic_url(array $record)
+	{
+		// Look for <!-- m --> or for a URL tag that's not immediately followed by <s>
+		return (strpos($record['text'], '<!-- m -->') !== false || preg_match('(<URL [^>]++>(?!<s>))', $record['text']));
+	}
+
+	/**
+	* Guess whether smilies are in use in given record
+	*
+	* @param  array $record
+	* @return bool
+	*/
+	protected function guess_smilies(array $record)
+	{
+		return (strpos($record['text'], '<!-- s') !== false || strpos($record['text'], '<E>') !== false);
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function reparse_range($min_id, $max_id)
+	{
+		foreach ($this->get_records_by_range($min_id, $max_id) as $record)
+		{
+			$this->reparse_record($record);
+		}
+	}
+
+	/**
+	* Reparse given record
+	*
+	* @param array $record Associative array containing the record's data
+	*/
+	protected function reparse_record(array $record)
+	{
+		$record = $this->add_missing_fields($record);
+		$flags = ($record['enable_bbcode']) ? OPTION_FLAG_BBCODE : 0;
+		$flags |= ($record['enable_smilies']) ? OPTION_FLAG_SMILIES : 0;
+		$flags |= ($record['enable_magic_url']) ? OPTION_FLAG_LINKS : 0;
+		$unparsed = array_merge(
+			$record,
+			generate_text_for_edit($record['text'], $record['bbcode_uid'], $flags)
+		);
+
+		// generate_text_for_edit() and decode_message() actually return the text as HTML. It has to
+		// be decoded to plain text before it can be reparsed
+		$text = html_entity_decode($unparsed['text'], ENT_QUOTES, 'UTF-8');
+		$bitfield = $flags = null;
+		generate_text_for_storage(
+			$text,
+			$unparsed['bbcode_uid'],
+			$bitfield,
+			$flags,
+			$unparsed['enable_bbcode'],
+			$unparsed['enable_magic_url'],
+			$unparsed['enable_smilies'],
+			$unparsed['enable_img_bbcode'],
+			$unparsed['enable_flash_bbcode'],
+			$unparsed['enable_quote_bbcode'],
+			$unparsed['enable_url_bbcode'],
+			'text_reparser.' . $this->get_name()
+		);
+
+		// Save the new text if it has changed and it's not a dry run
+		if ($text !== $record['text'] && $this->save_changes)
+		{
+			$record['text'] = $text;
+			$this->save_record($record);
+		}
+	}
+}
diff --git a/phpBB/phpbb/textreparser/manager.php b/phpBB/phpbb/textreparser/manager.php
new file mode 100644
index 0000000000..7ca65d708d
--- /dev/null
+++ b/phpBB/phpbb/textreparser/manager.php
@@ -0,0 +1,148 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\textreparser;
+
+class manager
+{
+	/**
+	 * @var \phpbb\config\config
+	 */
+	protected $config;
+
+	/**
+	 * @var \phpbb\config\db_text
+	 */
+	protected $config_text;
+
+	/**
+	 * @var \phpbb\di\service_collection
+	 */
+	protected $reparsers;
+
+	/**
+	 * @var array
+	 */
+	protected $resume_data;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\config\config			$config
+	 * @param \phpbb\config\db_text			$config_text
+	 * @param \phpbb\di\service_collection	$reparsers
+	 */
+	public function __construct(\phpbb\config\config $config, \phpbb\config\db_text $config_text, \phpbb\di\service_collection $reparsers)
+	{
+		$this->config = $config;
+		$this->config_text = $config_text;
+		$this->reparsers = $reparsers;
+	}
+
+	/**
+	 * Loads resume data from the database
+	 *
+	 * @param string	$name	Name of the reparser to which the resume data belongs
+	 *
+	 * @return array
+	 */
+	public function get_resume_data($name)
+	{
+		if ($this->resume_data === null)
+		{
+			$resume_data = $this->config_text->get('reparser_resume');
+			$this->resume_data = !empty($resume_data) ? unserialize($resume_data) : array();
+		}
+
+		return isset($this->resume_data[$name]) ? $this->resume_data[$name] : array();
+	}
+
+	/**
+	 * Updates the resume data in the database
+	 *
+	 * @param string	$name		Name of the reparser to which the resume data belongs
+	 * @param int		$min		Lowest record ID
+	 * @param int		$current	Current record ID
+	 * @param int		$size		Number of records to process at a time
+	 * @param bool		$update_db	True if the resume data should be written to the database, false if not. (default: true)
+	 */
+	public function update_resume_data($name, $min, $current, $size, $update_db = true)
+	{
+		// Prevent overwriting the old, stored array
+		if ($this->resume_data === null)
+		{
+			$this->get_resume_data('');
+		}
+
+		$this->resume_data[$name] = array(
+			'range-min'		=> $min,
+			'range-max'		=> $current,
+			'range-size'	=> $size,
+		);
+
+		if ($update_db)
+		{
+			$this->config_text->set('reparser_resume', serialize($this->resume_data));
+		}
+	}
+
+	/**
+	 * Sets the interval for a text_reparser cron task
+	 *
+	 * @param string	$name		Name of the reparser to schedule
+	 * @param int		$interval	Interval in seconds, 0 to disable the cron task
+	 */
+	public function schedule($name, $interval)
+	{
+		if (isset($this->reparsers[$name]) && isset($this->config[$name . '_cron_interval']))
+		{
+			$this->config->set($name . '_cron_interval', $interval);
+		}
+	}
+
+	/**
+	 * Sets the interval for all text_reparser cron tasks
+	 *
+	 * @param int	$interval	Interval in seconds, 0 to disable the cron task
+	 */
+	public function schedule_all($interval)
+	{
+		// This way we don't construct every registered reparser
+		$reparser_array = array_keys($this->reparsers->getArrayCopy());
+
+		foreach ($reparser_array as $reparser)
+		{
+			$this->schedule($reparser, $interval);
+		}
+	}
+
+	/**
+	 * Finds a reparser by name.
+	 *
+	 * If there is no reparser with the specified name, null is returned.
+	 *
+	 * @param string $name Name of the reparser to look up.
+	 * @return string A reparser service name, or null.
+	 */
+	public function find_reparser($name)
+	{
+		foreach ($this->reparsers as $service => $reparser)
+		{
+			if ($reparser->get_name() == $name)
+			{
+				return $service;
+			}
+		}
+		return null;
+	}
+}
diff --git a/phpBB/phpbb/textreparser/plugins/contact_admin_info.php b/phpBB/phpbb/textreparser/plugins/contact_admin_info.php
new file mode 100644
index 0000000000..8910f2256b
--- /dev/null
+++ b/phpBB/phpbb/textreparser/plugins/contact_admin_info.php
@@ -0,0 +1,69 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\textreparser\plugins;
+
+class contact_admin_info extends \phpbb\textreparser\base
+{
+	/**
+	* @var \phpbb\config\db_text
+	*/
+	protected $config_text;
+
+	/**
+	* Constructor
+	*
+	* @param \phpbb\config\db_text $config_text
+	*/
+	public function __construct(\phpbb\config\db_text $config_text)
+	{
+		$this->config_text = $config_text;
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function get_max_id()
+	{
+		return 1;
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	protected function get_records_by_range($min_id, $max_id)
+	{
+		$values = $this->config_text->get_array(array(
+			'contact_admin_info',
+			'contact_admin_info_uid',
+			'contact_admin_info_flags',
+		));
+
+		return array(array(
+			'id'               => 1,
+			'text'             => $values['contact_admin_info'],
+			'bbcode_uid'       => $values['contact_admin_info_uid'],
+			'enable_bbcode'    => $values['contact_admin_info_flags'] & OPTION_FLAG_BBCODE,
+			'enable_magic_url' => $values['contact_admin_info_flags'] & OPTION_FLAG_LINKS,
+			'enable_smilies'   => $values['contact_admin_info_flags'] & OPTION_FLAG_SMILIES,
+		));
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	protected function save_record(array $record)
+	{
+		$this->config_text->set('contact_admin_info', $record['text']);
+	}
+}
diff --git a/phpBB/phpbb/textreparser/plugins/forum_description.php b/phpBB/phpbb/textreparser/plugins/forum_description.php
new file mode 100644
index 0000000000..b0f5a42452
--- /dev/null
+++ b/phpBB/phpbb/textreparser/plugins/forum_description.php
@@ -0,0 +1,30 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\textreparser\plugins;
+
+class forum_description extends \phpbb\textreparser\row_based_plugin
+{
+	/**
+	* {@inheritdoc}
+	*/
+	public function get_columns()
+	{
+		return array(
+			'id'         => 'forum_id',
+			'text'       => 'forum_desc',
+			'bbcode_uid' => 'forum_desc_uid',
+			'options'    => 'forum_desc_options',
+		);
+	}
+}
diff --git a/phpBB/phpbb/textreparser/plugins/forum_rules.php b/phpBB/phpbb/textreparser/plugins/forum_rules.php
new file mode 100644
index 0000000000..d131d00707
--- /dev/null
+++ b/phpBB/phpbb/textreparser/plugins/forum_rules.php
@@ -0,0 +1,30 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\textreparser\plugins;
+
+class forum_rules extends \phpbb\textreparser\row_based_plugin
+{
+	/**
+	* {@inheritdoc}
+	*/
+	public function get_columns()
+	{
+		return array(
+			'id'         => 'forum_id',
+			'text'       => 'forum_rules',
+			'bbcode_uid' => 'forum_rules_uid',
+			'options'    => 'forum_rules_options',
+		);
+	}
+}
diff --git a/phpBB/phpbb/textreparser/plugins/group_description.php b/phpBB/phpbb/textreparser/plugins/group_description.php
new file mode 100644
index 0000000000..2c45c00474
--- /dev/null
+++ b/phpBB/phpbb/textreparser/plugins/group_description.php
@@ -0,0 +1,30 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\textreparser\plugins;
+
+class group_description extends \phpbb\textreparser\row_based_plugin
+{
+	/**
+	* {@inheritdoc}
+	*/
+	public function get_columns()
+	{
+		return array(
+			'id'         => 'group_id',
+			'text'       => 'group_desc',
+			'bbcode_uid' => 'group_desc_uid',
+			'options'    => 'group_desc_options',
+		);
+	}
+}
diff --git a/phpBB/phpbb/textreparser/plugins/pm_text.php b/phpBB/phpbb/textreparser/plugins/pm_text.php
new file mode 100644
index 0000000000..867da624ee
--- /dev/null
+++ b/phpBB/phpbb/textreparser/plugins/pm_text.php
@@ -0,0 +1,32 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\textreparser\plugins;
+
+class pm_text extends \phpbb\textreparser\row_based_plugin
+{
+	/**
+	* {@inheritdoc}
+	*/
+	public function get_columns()
+	{
+		return array(
+			'id'               => 'msg_id',
+			'enable_bbcode'    => 'enable_bbcode',
+			'enable_smilies'   => 'enable_smilies',
+			'enable_magic_url' => 'enable_magic_url',
+			'text'             => 'message_text',
+			'bbcode_uid'       => 'bbcode_uid',
+		);
+	}
+}
diff --git a/phpBB/phpbb/textreparser/plugins/poll_option.php b/phpBB/phpbb/textreparser/plugins/poll_option.php
new file mode 100644
index 0000000000..44cacfae62
--- /dev/null
+++ b/phpBB/phpbb/textreparser/plugins/poll_option.php
@@ -0,0 +1,74 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\textreparser\plugins;
+
+class poll_option extends \phpbb\textreparser\base
+{
+	/**
+	* @var \phpbb\db\driver\driver_interface
+	*/
+	protected $db;
+
+	/**
+	* Constructor
+	*
+	* @param \phpbb\db\driver\driver_interface $db Database connection
+	*/
+	public function __construct(\phpbb\db\driver\driver_interface $db)
+	{
+		$this->db = $db;
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function get_max_id()
+	{
+		$sql = 'SELECT MAX(topic_id) AS max_id FROM ' . POLL_OPTIONS_TABLE;
+		$result = $this->db->sql_query($sql);
+		$max_id = (int) $this->db->sql_fetchfield('max_id');
+		$this->db->sql_freeresult($result);
+
+		return $max_id;
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	protected function get_records_by_range($min_id, $max_id)
+	{
+		$sql = 'SELECT o.topic_id, o.poll_option_id, o.poll_option_text AS text, p.enable_bbcode, p.enable_smilies, p.enable_magic_url, p.bbcode_uid
+			FROM ' . POLL_OPTIONS_TABLE . ' o, ' . TOPICS_TABLE . ' t, ' . POSTS_TABLE . ' p
+			WHERE o.topic_id BETWEEN ' . $min_id . ' AND ' . $max_id .'
+				AND t.topic_id = o.topic_id
+				AND p.post_id = t.topic_first_post_id';
+		$result = $this->db->sql_query($sql);
+		$records = $this->db->sql_fetchrowset($result);
+		$this->db->sql_freeresult($result);
+
+		return $records;
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	protected function save_record(array $record)
+	{
+		$sql = 'UPDATE ' . POLL_OPTIONS_TABLE . "
+			SET poll_option_text = '" . $this->db->sql_escape($record['text']) . "'
+			WHERE topic_id = " . $record['topic_id'] . '
+				AND poll_option_id = ' . $record['poll_option_id'];
+		$this->db->sql_query($sql);
+	}
+}
diff --git a/phpBB/phpbb/textreparser/plugins/poll_title.php b/phpBB/phpbb/textreparser/plugins/poll_title.php
new file mode 100644
index 0000000000..5ca8bb063b
--- /dev/null
+++ b/phpBB/phpbb/textreparser/plugins/poll_title.php
@@ -0,0 +1,42 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\textreparser\plugins;
+
+class poll_title extends \phpbb\textreparser\row_based_plugin
+{
+	/**
+	* {@inheritdoc}
+	*/
+	public function get_columns()
+	{
+		return array(
+			'id'   => 'topic_id',
+			'text' => 'poll_title',
+		);
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	protected function get_records_by_range_query($min_id, $max_id)
+	{
+		$sql = 'SELECT t.topic_id AS id, t.poll_title AS text, p.enable_bbcode, p.enable_smilies, p.enable_magic_url, p.bbcode_uid
+			FROM ' . TOPICS_TABLE . ' t, ' . POSTS_TABLE . ' p
+			WHERE t.topic_id BETWEEN ' . $min_id . ' AND ' . $max_id .'
+				AND t.poll_start > 0
+				AND p.post_id = t.topic_first_post_id';
+
+		return $sql;
+	}
+}
diff --git a/phpBB/phpbb/textreparser/plugins/post_text.php b/phpBB/phpbb/textreparser/plugins/post_text.php
new file mode 100644
index 0000000000..1c98e86067
--- /dev/null
+++ b/phpBB/phpbb/textreparser/plugins/post_text.php
@@ -0,0 +1,32 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\textreparser\plugins;
+
+class post_text extends \phpbb\textreparser\row_based_plugin
+{
+	/**
+	* {@inheritdoc}
+	*/
+	public function get_columns()
+	{
+		return array(
+			'id'               => 'post_id',
+			'enable_bbcode'    => 'enable_bbcode',
+			'enable_smilies'   => 'enable_smilies',
+			'enable_magic_url' => 'enable_magic_url',
+			'text'             => 'post_text',
+			'bbcode_uid'       => 'bbcode_uid',
+		);
+	}
+}
diff --git a/phpBB/phpbb/textreparser/plugins/user_signature.php b/phpBB/phpbb/textreparser/plugins/user_signature.php
new file mode 100644
index 0000000000..647d3a7b14
--- /dev/null
+++ b/phpBB/phpbb/textreparser/plugins/user_signature.php
@@ -0,0 +1,65 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\textreparser\plugins;
+
+class user_signature extends \phpbb\textreparser\row_based_plugin
+{
+	/**
+	* @var array Bit numbers used for user options
+	* @see \phpbb\user
+	*/
+	protected $keyoptions;
+
+	/**
+	* {@inheritdoc}
+	*/
+	protected function add_missing_fields(array $row)
+	{
+		if (!isset($this->keyoptions))
+		{
+			$this->save_keyoptions();
+		}
+
+		$options = $row['user_options'];
+		$row += array(
+			'enable_bbcode'    => phpbb_optionget($this->keyoptions['sig_bbcode'], $options),
+			'enable_smilies'   => phpbb_optionget($this->keyoptions['sig_smilies'], $options),
+			'enable_magic_url' => phpbb_optionget($this->keyoptions['sig_links'], $options),
+		);
+
+		return parent::add_missing_fields($row);
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function get_columns()
+	{
+		return array(
+			'id'           => 'user_id',
+			'text'         => 'user_sig',
+			'bbcode_uid'   => 'user_sig_bbcode_uid',
+			'user_options' => 'user_options',
+		);
+	}
+
+	/**
+	* Save the keyoptions var from \phpbb\user
+	*/
+	protected function save_keyoptions()
+	{
+		$class_vars = get_class_vars('phpbb\\user');
+		$this->keyoptions = $class_vars['keyoptions'];
+	}
+}
diff --git a/phpBB/phpbb/textreparser/reparser_interface.php b/phpBB/phpbb/textreparser/reparser_interface.php
new file mode 100644
index 0000000000..912de10058
--- /dev/null
+++ b/phpBB/phpbb/textreparser/reparser_interface.php
@@ -0,0 +1,46 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\textreparser;
+
+interface reparser_interface
+{
+	/**
+	* Return the highest ID for all existing records
+	*
+	* @return integer
+	*/
+	public function get_max_id();
+
+	/**
+	 * Returns the name of the reparser
+	 *
+	 * @return string Name of reparser
+	 */
+	public function get_name();
+
+	/**
+	 * Sets the name of the reparser
+	 *
+	 * @param string $name The reparser name
+	 */
+	public function set_name($name);
+
+	/**
+	* Reparse all records in given range
+	*
+	* @param integer $min_id Lower bound
+	* @param integer $max_id Upper bound
+	*/
+	public function reparse_range($min_id, $max_id);
+}
diff --git a/phpBB/phpbb/textreparser/row_based_plugin.php b/phpBB/phpbb/textreparser/row_based_plugin.php
new file mode 100644
index 0000000000..2d32104493
--- /dev/null
+++ b/phpBB/phpbb/textreparser/row_based_plugin.php
@@ -0,0 +1,117 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\textreparser;
+
+abstract class row_based_plugin extends base
+{
+	/**
+	* @var \phpbb\db\driver\driver_interface
+	*/
+	protected $db;
+
+	/**
+	 * @var string
+	 */
+	protected $table;
+
+	/**
+	* Constructor
+	*
+	* @param \phpbb\db\driver\driver_interface $db Database connection
+	* @param string $table
+	*/
+	public function __construct(\phpbb\db\driver\driver_interface $db, $table)
+	{
+		$this->db = $db;
+		$this->table = $table;
+	}
+
+	/**
+	* Return the name of the column that correspond to each field
+	*
+	* @return array
+	*/
+	abstract public function get_columns();
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function get_max_id()
+	{
+		$columns = $this->get_columns();
+
+		$sql = 'SELECT MAX(' . $columns['id'] . ') AS max_id FROM ' . $this->table;
+		$result = $this->db->sql_query($sql);
+		$max_id = (int) $this->db->sql_fetchfield('max_id');
+		$this->db->sql_freeresult($result);
+
+		return $max_id;
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	protected function get_records_by_range($min_id, $max_id)
+	{
+		$sql = $this->get_records_by_range_query($min_id, $max_id);
+		$result = $this->db->sql_query($sql);
+		$records = $this->db->sql_fetchrowset($result);
+		$this->db->sql_freeresult($result);
+
+		return $records;
+	}
+
+	/**
+	* Generate the query that retrieves all records for given range
+	*
+	* @param  integer $min_id Lower bound
+	* @param  integer $max_id Upper bound
+	* @return string          SQL query
+	*/
+	protected function get_records_by_range_query($min_id, $max_id)
+	{
+		$columns = $this->get_columns();
+		$fields  = array();
+		foreach ($columns as $field_name => $column_name)
+		{
+			if ($column_name === $field_name)
+			{
+				$fields[] = $column_name;
+			}
+			else
+			{
+				$fields[] = $column_name . ' AS ' . $field_name;
+			}
+		}
+
+		$sql = 'SELECT ' . implode(', ', $fields) . '
+			FROM ' . $this->table . '
+			WHERE ' . $columns['id'] . ' BETWEEN ' . $min_id . ' AND ' . $max_id;
+
+		return $sql;
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	protected function save_record(array $record)
+	{
+		$columns = $this->get_columns();
+
+		$sql = 'UPDATE ' . $this->table . '
+			SET ' . $columns['text'] . " = '" . $this->db->sql_escape($record['text']) . "'
+			WHERE " . $columns['id'] . ' = ' . $record['id'];
+		$this->db->sql_query($sql);
+	}
+}
diff --git a/phpBB/phpbb/tree/nestedset.php b/phpBB/phpbb/tree/nestedset.php
index 8490c7c299..eadd2b3273 100644
--- a/phpBB/phpbb/tree/nestedset.php
+++ b/phpBB/phpbb/tree/nestedset.php
@@ -391,7 +391,6 @@ abstract class nestedset implements \phpbb\tree\tree_interface
 			throw new \OutOfBoundsException($this->message_prefix . 'INVALID_PARENT');
 		}
 
-		$diff = sizeof($move_items) * 2;
 		$sql_exclude_moved_items = $this->db->sql_in_set($this->column_item_id, $move_items, true);
 
 		$this->db->sql_transaction('begin');
@@ -490,7 +489,6 @@ abstract class nestedset implements \phpbb\tree\tree_interface
 			throw new \OutOfBoundsException($this->message_prefix . 'INVALID_PARENT');
 		}
 
-		$diff = sizeof($move_items) * 2;
 		$sql_exclude_moved_items = $this->db->sql_in_set($this->column_item_id, $move_items, true);
 
 		$this->db->sql_transaction('begin');
@@ -535,7 +533,7 @@ abstract class nestedset implements \phpbb\tree\tree_interface
 			$row = $this->db->sql_fetchrow($result);
 			$this->db->sql_freeresult($result);
 
-			$diff = ' + ' . ($row[$this->column_right_id] - (int) $item[$this->column_left_id] + 1);
+			$diff = ' + ' . ((int) $row[$this->column_right_id] - (int) $item[$this->column_left_id] + 1);
 		}
 
 		$sql = 'UPDATE ' . $this->table_name . '
@@ -708,7 +706,7 @@ abstract class nestedset implements \phpbb\tree\tree_interface
 	{
 		$acquired_new_lock = $this->acquire_lock();
 
-		$diff = sizeof($subset_items) * 2;
+		$diff = count($subset_items) * 2;
 		$sql_subset_items = $this->db->sql_in_set($this->column_item_id, $subset_items);
 		$sql_not_subset_items = $this->db->sql_in_set($this->column_item_id, $subset_items, true);
 
@@ -748,7 +746,7 @@ abstract class nestedset implements \phpbb\tree\tree_interface
 	*/
 	protected function prepare_adding_subset(array $subset_items, array $new_parent)
 	{
-		$diff = sizeof($subset_items) * 2;
+		$diff = count($subset_items) * 2;
 		$sql_not_subset_items = $this->db->sql_in_set($this->column_item_id, $subset_items, true);
 
 		$set_left_id = $this->db->sql_case($this->column_left_id . ' > ' . (int) $new_parent[$this->column_right_id], $this->column_left_id . ' + ' . $diff, $this->column_left_id);
diff --git a/phpBB/phpbb/user.php b/phpBB/phpbb/user.php
index faedd79703..9817e40edb 100644
--- a/phpBB/phpbb/user.php
+++ b/phpBB/phpbb/user.php
@@ -21,8 +21,11 @@ namespace phpbb;
 */
 class user extends \phpbb\session
 {
-	var $lang = array();
-	var $help = array();
+	/**
+	 * @var \phpbb\language\language
+	 */
+	protected $language;
+
 	var $style = array();
 	var $date_format;
 
@@ -42,35 +45,63 @@ class user extends \phpbb\session
 	var $img_lang;
 	var $img_array = array();
 
+	/** @var bool */
+	protected $is_setup_flag;
+
 	// Able to add new options (up to id 31)
 	var $keyoptions = array('viewimg' => 0, 'viewflash' => 1, 'viewsmilies' => 2, 'viewsigs' => 3, 'viewavatars' => 4, 'viewcensors' => 5, 'attachsig' => 6, 'bbcode' => 8, 'smilies' => 9, 'sig_bbcode' => 15, 'sig_smilies' => 16, 'sig_links' => 17);
 
 	/**
 	* Constructor to set the lang path
-	* @param string $datetime_class Class name of datetime class
+	*
+	* @param \phpbb\language\language	$lang			phpBB's Language loader
+	* @param string						$datetime_class	Class name of datetime class
 	*/
-	function __construct($datetime_class)
+	function __construct(\phpbb\language\language $lang, $datetime_class)
 	{
 		global $phpbb_root_path;
 
 		$this->lang_path = $phpbb_root_path . 'language/';
+		$this->language = $lang;
 		$this->datetime = $datetime_class;
+
+		$this->is_setup_flag = false;
 	}
 
 	/**
-	* Function to set custom language path (able to use directory outside of phpBB)
-	*
-	* @param string $lang_path New language path used.
-	* @access public
-	*/
-	function set_custom_lang_path($lang_path)
+	 * Returns whether user::setup was called
+	 *
+	 * @return bool
+	 */
+	public function is_setup()
 	{
-		$this->lang_path = $lang_path;
+		return $this->is_setup_flag;
+	}
 
-		if (substr($this->lang_path, -1) != '/')
+	/**
+	 * Magic getter for BC compatibility
+	 *
+	 * Implement array access for user::lang.
+	 *
+	 * @param string	$param_name	Name of the BC component the user want to access
+	 *
+	 * @return array	The appropriate array
+	 *
+	 * @deprecated 3.2.0-dev (To be removed: 4.0.0)
+	 */
+	public function __get($param_name)
+	{
+		if ($param_name === 'lang')
 		{
-			$this->lang_path .= '/';
+			return $this->language->get_lang_array();
 		}
+		else if ($param_name === 'help')
+		{
+			$help_array = $this->language->get_lang_array();
+			return $help_array['__help'];
+		}
+
+		return array();
 	}
 
 	/**
@@ -81,6 +112,8 @@ class user extends \phpbb\session
 		global $db, $request, $template, $config, $auth, $phpEx, $phpbb_root_path, $cache;
 		global $phpbb_dispatcher;
 
+		$this->language->set_default_language($config['default_lang']);
+
 		if ($this->data['user_id'] != ANONYMOUS)
 		{
 			$user_lang_name = (file_exists($this->lang_path . $this->data['user_lang'] . "/common.$phpEx")) ? $this->data['user_lang'] : basename($config['default_lang']);
@@ -98,6 +131,7 @@ class user extends \phpbb\session
 			{
 				$lang_override = $request->variable($config['cookie_name'] . '_lang', '', true, \phpbb\request\request_interface::COOKIE);
 			}
+
 			if ($lang_override)
 			{
 				$use_lang = basename($lang_override);
@@ -108,6 +142,7 @@ class user extends \phpbb\session
 			{
 				$user_lang_name = basename($config['default_lang']);
 			}
+
 			$user_date_format = $config['default_dateformat'];
 			$user_timezone = $config['board_timezone'];
 
@@ -154,6 +189,9 @@ class user extends \phpbb\session
 		/**
 		* Event to load language files and modify user data on every page
 		*
+		* Note: To load language file with this event, see description
+		* of lang_set_ext variable.
+		*
 		* @event core.user_setup
 		* @var	array	user_data			Array with user's data row
 		* @var	string	user_lang_name		Basename of the user's langauge
@@ -187,6 +225,8 @@ class user extends \phpbb\session
 		$this->lang_name = $user_lang_name;
 		$this->date_format = $user_date_format;
 
+		$this->language->set_user_language($user_lang_name);
+
 		try
 		{
 			$this->timezone = new \DateTimeZone($user_timezone);
@@ -197,17 +237,6 @@ class user extends \phpbb\session
 			$this->timezone = new \DateTimeZone('UTC');
 		}
 
-		// We include common language file here to not load it every time a custom language file is included
-		$lang = &$this->lang;
-
-		// Do not suppress error if in DEBUG mode
-		$include_result = (defined('DEBUG')) ? (include $this->lang_path . $this->lang_name . "/common.$phpEx") : (@include $this->lang_path . $this->lang_name . "/common.$phpEx");
-
-		if ($include_result === false)
-		{
-			die('Language file ' . $this->lang_path . $this->lang_name . "/common.$phpEx" . " couldn't be opened.");
-		}
-
 		$this->add_lang($lang_set);
 		unset($lang_set);
 
@@ -252,27 +281,43 @@ class user extends \phpbb\session
 			$db->sql_freeresult($result);
 		}
 
-		// User has wrong style
-		if (!$this->style && $style_id == $this->data['user_style'])
+		// Fallback to board's default style
+		if (!$this->style)
 		{
-			$style_id = $this->data['user_style'] = $config['default_style'];
-
-			$sql = 'UPDATE ' . USERS_TABLE . "
-				SET user_style = $style_id
-				WHERE user_id = {$this->data['user_id']}";
-			$db->sql_query($sql);
-
-			$sql = 'SELECT *
-				FROM ' . STYLES_TABLE . " s
-				WHERE s.style_id = $style_id";
-			$result = $db->sql_query($sql, 3600);
-			$this->style = $db->sql_fetchrow($result);
+			// Verify default style exists in the database
+			$sql = 'SELECT style_id
+				FROM ' . STYLES_TABLE . '
+				WHERE style_id = ' . (int) $config['default_style'];
+			$result = $db->sql_query($sql);
+			$style_id = (int) $db->sql_fetchfield('style_id');
 			$db->sql_freeresult($result);
+
+			if ($style_id > 0)
+			{
+				$db->sql_transaction('begin');
+
+				// Update $user row
+				$sql = 'SELECT *
+					FROM ' . STYLES_TABLE . '
+					WHERE style_id = ' . (int) $config['default_style'];
+				$result = $db->sql_query($sql);
+				$this->style = $db->sql_fetchrow($result);
+				$db->sql_freeresult($result);
+
+				// Update user style preference
+				$sql = 'UPDATE ' . USERS_TABLE . '
+					SET user_style = ' . (int) $style_id . '
+					WHERE user_id = ' . (int) $this->data['user_id'];
+				$db->sql_query($sql);
+
+				$db->sql_transaction('commit');
+			}
 		}
 
+		// This should never happen
 		if (!$this->style)
 		{
-			trigger_error('NO_STYLE_DATA', E_USER_ERROR);
+			trigger_error($this->language->lang('NO_STYLE_DATA', $this->data['user_style'], $this->data['user_id']), E_USER_ERROR);
 		}
 
 		// Now parse the cfg file and cache it
@@ -332,7 +377,7 @@ class user extends \phpbb\session
 		}
 
 		// Is board disabled and user not an admin or moderator?
-		if ($config['board_disable'] && !defined('IN_LOGIN') && !defined('SKIP_CHECK_DISABLED') && !$auth->acl_gets('a_', 'm_') && !$auth->acl_getf_global('m_'))
+		if ($config['board_disable'] && !defined('IN_INSTALL') && !defined('IN_LOGIN') && !defined('SKIP_CHECK_DISABLED') && !$auth->acl_gets('a_', 'm_') && !$auth->acl_getf_global('m_'))
 		{
 			if ($this->data['is_bot'])
 			{
@@ -401,6 +446,8 @@ class user extends \phpbb\session
 			}
 		}
 
+		$this->is_setup_flag = true;
+
 		return;
 	}
 
@@ -414,103 +461,13 @@ class user extends \phpbb\session
 	*
 	* If the first parameter is an array, the elements are used as keys and subkeys to get the language entry:
 	* Example: <samp>$user->lang(array('datetime', 'AGO'), 1)</samp> uses $user->lang['datetime']['AGO'] as language entry.
+	*
+	* @deprecated 3.2.0-dev (To be removed 4.0.0)
 	*/
 	function lang()
 	{
 		$args = func_get_args();
-		$key = $args[0];
-
-		if (is_array($key))
-		{
-			$lang = &$this->lang[array_shift($key)];
-
-			foreach ($key as $_key)
-			{
-				$lang = &$lang[$_key];
-			}
-		}
-		else
-		{
-			$lang = &$this->lang[$key];
-		}
-
-		// Return if language string does not exist
-		if (!isset($lang) || (!is_string($lang) && !is_array($lang)))
-		{
-			return $key;
-		}
-
-		// If the language entry is a string, we simply mimic sprintf() behaviour
-		if (is_string($lang))
-		{
-			if (sizeof($args) == 1)
-			{
-				return $lang;
-			}
-
-			// Replace key with language entry and simply pass along...
-			$args[0] = $lang;
-			return call_user_func_array('sprintf', $args);
-		}
-		else if (sizeof($lang) == 0)
-		{
-			// If the language entry is an empty array, we just return the language key
-			return $args[0];
-		}
-
-		// It is an array... now handle different nullar/singular/plural forms
-		$key_found = false;
-
-		// We now get the first number passed and will select the key based upon this number
-		for ($i = 1, $num_args = sizeof($args); $i < $num_args; $i++)
-		{
-			if (is_int($args[$i]) || is_float($args[$i]))
-			{
-				if ($args[$i] == 0 && isset($lang[0]))
-				{
-					// We allow each translation using plural forms to specify a version for the case of 0 things,
-					// so that "0 users" may be displayed as "No users".
-					$key_found = 0;
-					break;
-				}
-				else
-				{
-					$use_plural_form = $this->get_plural_form($args[$i]);
-					if (isset($lang[$use_plural_form]))
-					{
-						// The key we should use exists, so we use it.
-						$key_found = $use_plural_form;
-					}
-					else
-					{
-						// If the key we need to use does not exist, we fall back to the previous one.
-						$numbers = array_keys($lang);
-
-						foreach ($numbers as $num)
-						{
-							if ($num > $use_plural_form)
-							{
-								break;
-							}
-
-							$key_found = $num;
-						}
-					}
-					break;
-				}
-			}
-		}
-
-		// Ok, let's check if the key was found, else use the last entry (because it is mostly the plural form)
-		if ($key_found === false)
-		{
-			$numbers = array_keys($lang);
-			$key_found = end($numbers);
-		}
-
-		// Use the language string we determined and pass it to sprintf()
-		$args[0] = $lang[$key_found];
-		return call_user_func_array('sprintf', $args);
+		return call_user_func_array(array($this->language, 'lang'), $args);
 	}
 
 	/**
@@ -520,24 +477,22 @@ class user extends \phpbb\session
 	* @param $number        int|float   The number we want to get the plural case for. Float numbers are floored.
 	* @param $force_rule    mixed   False to use the plural rule of the language package
 	*                               or an integer to force a certain plural rule
-	* @return   int     The plural-case we need to use for the number plural-rule combination
+	* @return int|bool     The plural-case we need to use for the number plural-rule combination, false if $force_rule
+	* 					   was invalid.
+	*
+	* @deprecated: 3.2.0-dev (To be removed: 3.3.0)
 	*/
 	function get_plural_form($number, $force_rule = false)
 	{
-		$number = (int) $number;
-
-		// Default to English system
-		$plural_rule = ($force_rule !== false) ? $force_rule : ((isset($this->lang['PLURAL_RULE'])) ? $this->lang['PLURAL_RULE'] : 1);
-
-		return phpbb_get_plural_form($plural_rule, $number);
+		return $this->language->get_plural_form($number, $force_rule);
 	}
 
 	/**
 	* Add Language Items - use_db and use_help are assigned where needed (only use them to force inclusion)
 	*
 	* @param mixed $lang_set specifies the language entries to include
-	* @param bool $use_db internal variable for recursion, do not use
-	* @param bool $use_help internal variable for recursion, do not use
+	* @param bool $use_db internal variable for recursion, do not use	@deprecated 3.2.0-dev (To be removed: 3.3.0)
+	* @param bool $use_help internal variable for recursion, do not use	@deprecated 3.2.0-dev (To be removed: 3.3.0)
 	* @param string $ext_name The extension to load language from, or empty for core files
 	*
 	* Examples:
@@ -548,11 +503,14 @@ class user extends \phpbb\session
 	* $lang_set = 'posting'
 	* $lang_set = array('help' => 'faq', 'db' => array('help:faq', 'posting'))
 	* </code>
+	*
+	* Note: $use_db and $use_help should be removed. The old function was kept for BC purposes,
+	* 		so the BC logic is handled here.
+	*
+	* @deprecated: 3.2.0-dev (To be removed: 3.3.0)
 	*/
 	function add_lang($lang_set, $use_db = false, $use_help = false, $ext_name = '')
 	{
-		global $phpEx;
-
 		if (is_array($lang_set))
 		{
 			foreach ($lang_set as $key => $lang_file)
@@ -563,6 +521,7 @@ class user extends \phpbb\session
 
 				if ($key == 'db')
 				{
+					// This is never used
 					$this->add_lang($lang_file, true, $use_help, $ext_name);
 				}
 				else if ($key == 'help')
@@ -571,7 +530,7 @@ class user extends \phpbb\session
 				}
 				else if (!is_array($lang_file))
 				{
-					$this->set_lang($this->lang, $this->help, $lang_file, $use_db, $use_help, $ext_name);
+					$this->set_lang($lang_file, $use_help, $ext_name);
 				}
 				else
 				{
@@ -582,8 +541,37 @@ class user extends \phpbb\session
 		}
 		else if ($lang_set)
 		{
-			$this->set_lang($this->lang, $this->help, $lang_set, $use_db, $use_help, $ext_name);
+			$this->set_lang($lang_set, $use_help, $ext_name);
+		}
+	}
+
+	/**
+	 * BC function for loading language files
+	 *
+	 * @deprecated 3.2.0-dev (To be removed: 3.3.0)
+	 */
+	private function set_lang($lang_set, $use_help, $ext_name)
+	{
+		if (empty($ext_name))
+		{
+			$ext_name = null;
+		}
+
+		if ($use_help && strpos($lang_set, '/') !== false)
+		{
+			$component = dirname($lang_set) . '/help_' . basename($lang_set);
+
+			if ($component[0] === '/')
+			{
+				$component = substr($component, 1);
+			}
 		}
+		else
+		{
+			$component = (($use_help) ? 'help_' : '') . $lang_set;
+		}
+
+		$this->language->add_lang($component, $ext_name);
 	}
 
 	/**
@@ -593,6 +581,10 @@ class user extends \phpbb\session
 	* @param mixed $lang_set specifies the language entries to include
 	* @param bool $use_db internal variable for recursion, do not use
 	* @param bool $use_help internal variable for recursion, do not use
+	*
+	* Note: $use_db and $use_help should be removed. Kept for BC purposes.
+	*
+	* @deprecated: 3.2.0-dev (To be removed: 3.3.0)
 	*/
 	function add_lang_ext($ext_name, $lang_set, $use_db = false, $use_help = false)
 	{
@@ -605,109 +597,6 @@ class user extends \phpbb\session
 	}
 
 	/**
-	* Set language entry (called by add_lang)
-	* @access private
-	*/
-	function set_lang(&$lang, &$help, $lang_file, $use_db = false, $use_help = false, $ext_name = '')
-	{
-		global $phpbb_root_path, $phpEx;
-
-		// Make sure the language name is set (if the user setup did not happen it is not set)
-		if (!$this->lang_name)
-		{
-			global $config;
-			$this->lang_name = basename($config['default_lang']);
-		}
-
-		// $lang == $this->lang
-		// $help == $this->help
-		// - add appropriate variables here, name them as they are used within the language file...
-		if (!$use_db)
-		{
-			if ($use_help && strpos($lang_file, '/') !== false)
-			{
-				$filename = dirname($lang_file) . '/help_' . basename($lang_file);
-			}
-			else
-			{
-				$filename = (($use_help) ? 'help_' : '') . $lang_file;
-			}
-
-			if ($ext_name)
-			{
-				global $phpbb_extension_manager;
-				$ext_path = $phpbb_extension_manager->get_extension_path($ext_name, true);
-
-				$lang_path = $ext_path . 'language/';
-			}
-			else
-			{
-				$lang_path = $this->lang_path;
-			}
-
-			if (strpos($phpbb_root_path . $filename, $lang_path) === 0)
-			{
-				$language_filename = $phpbb_root_path . $filename;
-			}
-			else
-			{
-				$language_filename = $lang_path . $this->lang_name . '/' . $filename . '.' . $phpEx;
-			}
-
-			// If we are in install, try to use the updated version, when available
-			$install_language_filename = str_replace('language/', 'install/update/new/language/', $language_filename);
-			if (defined('IN_INSTALL') && file_exists($install_language_filename))
-			{
-				$language_filename = $install_language_filename;
-			}
-
-			if (!file_exists($language_filename))
-			{
-				global $config;
-
-				if ($this->lang_name == 'en')
-				{
-					// The user's selected language is missing the file, the board default's language is missing the file, and the file doesn't exist in /en.
-					$language_filename = str_replace($lang_path . 'en', $lang_path . $this->data['user_lang'], $language_filename);
-					trigger_error('Language file ' . $language_filename . ' couldn\'t be opened.', E_USER_ERROR);
-				}
-				else if ($this->lang_name == basename($config['default_lang']))
-				{
-					// Fall back to the English Language
-					$reset_lang_name = $this->lang_name;
-					$this->lang_name = 'en';
-					$this->set_lang($lang, $help, $lang_file, $use_db, $use_help, $ext_name);
-					$this->lang_name = $reset_lang_name;
-				}
-				else if ($this->lang_name == $this->data['user_lang'])
-				{
-					// Fall back to the board default language
-					$reset_lang_name = $this->lang_name;
-					$this->lang_name = basename($config['default_lang']);
-					$this->set_lang($lang, $help, $lang_file, $use_db, $use_help, $ext_name);
-					$this->lang_name = $reset_lang_name;
-				}
-
-				return;
-			}
-
-			// Do not suppress error if in DEBUG mode
-			$include_result = (defined('DEBUG')) ? (include $language_filename) : (@include $language_filename);
-
-			if ($include_result === false)
-			{
-				trigger_error('Language file ' . $language_filename . ' couldn\'t be opened.', E_USER_ERROR);
-			}
-		}
-		else if ($use_db)
-		{
-			// Get Database Language Strings
-			// Put them into $lang if nothing is prefixed, put them into $help if help: is prefixed
-			// For example: help:faq, posting
-		}
-	}
-
-	/**
 	* Format user date
 	*
 	* @param int $gmepoch unix timestamp
@@ -718,6 +607,7 @@ class user extends \phpbb\session
 	*/
 	function format_date($gmepoch, $format = false, $forcedate = false)
 	{
+		global $phpbb_dispatcher;
 		static $utc;
 
 		if (!isset($utc))
@@ -725,10 +615,34 @@ class user extends \phpbb\session
 			$utc = new \DateTimeZone('UTC');
 		}
 
-		$time = new $this->datetime($this, '@' . (int) $gmepoch, $utc);
-		$time->setTimezone($this->timezone);
+		$format_date_override = false;
+		$function_arguments = func_get_args();
+		/**
+		* Execute code and/or override format_date()
+		*
+		* To override the format_date() function generated value
+		* set $format_date_override to new return value
+		*
+		* @event core.user_format_date_override
+		* @var DateTimeZone	utc Is DateTimeZone in UTC
+		* @var array function_arguments is array comprising a function's argument list
+		* @var string format_date_override Shall we return custom format (string) or not (false)
+		* @since 3.2.1-RC1
+		*/
+		$vars = array('utc', 'function_arguments', 'format_date_override');
+		extract($phpbb_dispatcher->trigger_event('core.user_format_date_override', compact($vars)));
 
-		return $time->format($format, $forcedate);
+		if (!$format_date_override)
+		{
+			$time = new $this->datetime($this, '@' . (int) $gmepoch, $utc);
+			$time->setTimezone($this->timezone);
+
+			return $time->format($format, $forcedate);
+		}
+		else
+		{
+			return $format_date_override;
+		}
 	}
 
 	/**
@@ -816,7 +730,7 @@ class user extends \phpbb\session
 
 		if ($alt)
 		{
-			$alt = $this->lang($alt);
+			$alt = $this->language->lang($alt);
 			$title = ' title="' . $alt . '"';
 		}
 		return '<span class="imageset ' . $img . '"' . $title . '>' . $alt . '</span>';
@@ -877,8 +791,6 @@ class user extends \phpbb\session
 	*/
 	function leave_newly_registered()
 	{
-		global $db;
-
 		if (empty($this->data['user_new']))
 		{
 			return false;
diff --git a/phpBB/phpbb/user_loader.php b/phpBB/phpbb/user_loader.php
index 967d96d73a..9297450f3e 100644
--- a/phpBB/phpbb/user_loader.php
+++ b/phpBB/phpbb/user_loader.php
@@ -64,8 +64,9 @@ class user_loader
 	* Load user helper
 	*
 	* @param array $user_ids
+	* @param array $ignore_types user types to ignore
 	*/
-	public function load_users(array $user_ids)
+	public function load_users(array $user_ids, array $ignore_types = array())
 	{
 		$user_ids[] = ANONYMOUS;
 
@@ -75,11 +76,12 @@ class user_loader
 		// Do not load users we already have in $this->users
 		$user_ids = array_diff($user_ids, array_keys($this->users));
 
-		if (sizeof($user_ids))
+		if (count($user_ids))
 		{
 			$sql = 'SELECT *
 				FROM ' . $this->users_table . '
-				WHERE ' . $this->db->sql_in_set('user_id', $user_ids);
+				WHERE ' . $this->db->sql_in_set('user_id', $user_ids) . '
+					AND ' . $this->db->sql_in_set('user_type', $ignore_types, true, true);
 			$result = $this->db->sql_query($sql);
 
 			while ($row = $this->db->sql_fetchrow($result))
@@ -175,7 +177,7 @@ class user_loader
 	/**
 	* Get avatar
 	*
-	* @param int $user_id User ID of the user you want to retreive the avatar for
+	* @param int $user_id User ID of the user you want to retrieve the avatar for
 	* @param bool $query Should we query the database if this user has not yet been loaded?
 	* 						Typically this should be left as false and you should make sure
 	* 						you load users ahead of time with load_users()
@@ -189,7 +191,14 @@ class user_loader
 			return '';
 		}
 
-		return phpbb_get_avatar(\phpbb\avatar\manager::clean_row($user, 'user'), 'USER_AVATAR', false, $lazy);
+		$row = array(
+			'avatar'		=> $user['user_avatar'],
+			'avatar_type'	=> $user['user_avatar_type'],
+			'avatar_width'	=> $user['user_avatar_width'],
+			'avatar_height'	=> $user['user_avatar_height'],
+		);
+
+		return phpbb_get_avatar($row, 'USER_AVATAR', false, $lazy);
 	}
 
 	/**
diff --git a/phpBB/phpbb/version_helper.php b/phpBB/phpbb/version_helper.php
index 7e5edbf522..a73fbfbfbe 100644
--- a/phpBB/phpbb/version_helper.php
+++ b/phpBB/phpbb/version_helper.php
@@ -13,6 +13,8 @@
 
 namespace phpbb;
 
+use phpbb\exception\version_check_exception;
+
 /**
  * Class to handle version checking and comparison
  */
@@ -58,9 +60,6 @@ class version_helper
 	/** @var \phpbb\file_downloader */
 	protected $file_downloader;
 
-	/** @var \phpbb\user */
-	protected $user;
-
 	protected $version_schema = array(
 		'stable' => array(
 			'current'		=> 'version',
@@ -84,14 +83,12 @@ class version_helper
 	 * @param \phpbb\cache\service $cache
 	 * @param \phpbb\config\config $config
 	 * @param \phpbb\file_downloader $file_downloader
-	 * @param \phpbb\user $user
 	 */
-	public function __construct(\phpbb\cache\service $cache, \phpbb\config\config $config, \phpbb\file_downloader $file_downloader, \phpbb\user $user)
+	public function __construct(\phpbb\cache\service $cache, \phpbb\config\config $config, \phpbb\file_downloader $file_downloader)
 	{
 		$this->cache = $cache;
 		$this->config = $config;
 		$this->file_downloader = $file_downloader;
-		$this->user = $user;
 
 		if (defined('PHPBB_QA'))
 		{
@@ -192,7 +189,7 @@ class version_helper
 	* @param bool $force_update Ignores cached data. Defaults to false.
 	* @param bool $force_cache Force the use of the cache. Override $force_update.
 	* @return string
-	* @throws \RuntimeException
+	* @throws version_check_exception
 	*/
 	public function get_latest_on_current_branch($force_update = false, $force_cache = false)
 	{
@@ -329,7 +326,7 @@ class version_helper
 	* @param bool $force_update Ignores cached data. Defaults to false.
 	* @param bool $force_cache Force the use of the cache. Override $force_update.
 	* @return array
-	* @throws \RuntimeException
+	* @throws version_check_exception
 	*/
 	public function get_suggested_updates($force_update = false, $force_cache = false)
 	{
@@ -350,7 +347,7 @@ class version_helper
 	* @param bool $force_update Ignores cached data. Defaults to false.
 	* @param bool $force_cache Force the use of the cache. Override $force_update.
 	* @return array Version info
-	* @throws \RuntimeException
+	* @throws version_check_exception
 	*/
 	public function get_versions_matching_stability($force_update = false, $force_cache = false)
 	{
@@ -370,7 +367,7 @@ class version_helper
 	* @param bool $force_update Ignores cached data. Defaults to false.
 	* @param bool $force_cache Force the use of the cache. Override $force_update.
 	* @return array Version info, includes stable and unstable data
-	* @throws \RuntimeException
+	* @throws version_check_exception
 	*/
 	public function get_versions($force_update = false, $force_cache = false)
 	{
@@ -380,23 +377,16 @@ class version_helper
 
 		if ($info === false && $force_cache)
 		{
-			throw new \RuntimeException($this->user->lang('VERSIONCHECK_FAIL'));
+			throw new version_check_exception('VERSIONCHECK_FAIL');
 		}
 		else if ($info === false || $force_update)
 		{
-			try {
-				$info = $this->file_downloader->get($this->host, $this->path, $this->file, $this->use_ssl ? 443 : 80);
-			}
-			catch (\phpbb\exception\runtime_exception $exception)
-			{
-				$prepare_parameters = array_merge(array($exception->getMessage()), $exception->get_parameters());
-				throw new \RuntimeException(call_user_func_array(array($this->user, 'lang'), $prepare_parameters));
-			}
+			$info = $this->file_downloader->get($this->host, $this->path, $this->file, $this->use_ssl ? 443 : 80);
 			$error_string = $this->file_downloader->get_error_string();
 
 			if (!empty($error_string))
 			{
-				throw new \RuntimeException($error_string);
+				throw new version_check_exception($error_string);
 			}
 
 			$info = json_decode($info, true);
@@ -413,9 +403,7 @@ class version_helper
 
 			if (empty($info['stable']) && empty($info['unstable']))
 			{
-				$this->user->add_lang('acp/common');
-
-				throw new \RuntimeException($this->user->lang('VERSIONCHECK_FAIL'));
+				throw new version_check_exception('VERSIONCHECK_FAIL');
 			}
 
 			$info['stable'] = (empty($info['stable'])) ? array() : $info['stable'];
@@ -436,6 +424,7 @@ class version_helper
 	 *		and cleaned by this method
 	 *
 	 * @return array Versions info array
+	 * @throws version_check_exception
 	 */
 	public function validate_versions($versions_info)
 	{
@@ -483,7 +472,7 @@ class version_helper
 					if (!isset($this->version_schema[$stability_type][$key]))
 					{
 						unset($version_data[$key]);
-						throw new \RuntimeException($this->user->lang('VERSIONCHECK_INVALID_ENTRY'));
+						throw new version_check_exception('VERSIONCHECK_INVALID_ENTRY');
 					}
 
 					switch ($this->version_schema[$stability_type][$key])
@@ -496,20 +485,20 @@ class version_helper
 							if (!empty($value) && !preg_match('#^' . get_preg_expression('url') . '$#iu', $value) &&
 								!preg_match('#^' . get_preg_expression('www_url') . '$#iu', $value))
 							{
-								throw new \RuntimeException($this->user->lang('VERSIONCHECK_INVALID_URL'));
+								throw new version_check_exception('VERSIONCHECK_INVALID_URL');
 							}
 						break;
 
 						case 'version':
 							if (!empty($value) && !preg_match(get_preg_expression('semantic_version'), $value))
 							{
-								throw new \RuntimeException($this->user->lang('VERSIONCHECK_INVALID_VERSION'));
+								throw new version_check_exception('VERSIONCHECK_INVALID_VERSION');
 							}
 						break;
 
 						default:
 							// Shouldn't be possible to trigger this
-							throw new \RuntimeException($this->user->lang('VERSIONCHECK_INVALID_ENTRY'));
+							throw new version_check_exception('VERSIONCHECK_INVALID_ENTRY');
 					}
 				}
 			}
diff --git a/phpBB/phpbb/viewonline_helper.php b/phpBB/phpbb/viewonline_helper.php
index b722f9d911..89915f2228 100644
--- a/phpBB/phpbb/viewonline_helper.php
+++ b/phpBB/phpbb/viewonline_helper.php
@@ -18,13 +18,13 @@ namespace phpbb;
 */
 class viewonline_helper
 {
-	/** @var \phpbb\filesystem */
+	/** @var \phpbb\filesystem\filesystem_interface */
 	protected $filesystem;
 
 	/**
-	* @param \phpbb\filesystem $filesystem
+	* @param \phpbb\filesystem\filesystem_interface $filesystem	phpBB's filesystem service
 	*/
-	public function __construct(\phpbb\filesystem $filesystem)
+	public function __construct(\phpbb\filesystem\filesystem_interface $filesystem)
 	{
 		$this->filesystem = $filesystem;
 	}
author	Maat <maat-pub@mageia.biz>	2020-05-08 21:52:11 +0200
committer	Maat <maat-pub@mageia.biz>	2020-05-08 21:52:11 +0200
commit	8ea437e30605e0f66b5220bf904a61d7c1d11ddd (patch)
tree	e0db2bb4a012d5b06a633160b19f62f4868ecd28 /phpBB/phpbb
parent	36bc1870f21fac04736a1049c1d5b8e127d729f4 (diff)
parent	2fdd46b36431ae0f58bb2e78e42553168db9a0ff (diff)
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