21 files changed, 292 insertions, 153 deletions
diff --git a/phpBB/includes/acp/acp_attachments.php b/phpBB/includes/acp/acp_attachments.php
index 59057a0447..2372c1f73c 100644
--- a/phpBB/includes/acp/acp_attachments.php
+++ b/phpBB/includes/acp/acp_attachments.php
@@ -1301,7 +1301,6 @@ class acp_attachments
 	/**
 	* Check accuracy of attachment statistics.
 	*
-	* @param $resync bool	Resync stats if they're incorrect.
 	* @return bool|string	Returns false if stats are correct or error message
 	*	otherwise.
 	*/
diff --git a/phpBB/includes/acp/acp_ban.php b/phpBB/includes/acp/acp_ban.php
index 7cc6741e23..361ef2666c 100644
--- a/phpBB/includes/acp/acp_ban.php
+++ b/phpBB/includes/acp/acp_ban.php
@@ -176,8 +176,6 @@ class acp_ban
 		$result = $db->sql_query($sql);
 
 		$banned_options = $excluded_options = array();
-		$ban_length = $ban_reasons = $ban_give_reasons = array();
-
 		while ($row = $db->sql_fetchrow($result))
 		{
 			$option = '<option value="' . $row['ban_id'] . '">' . $row[$field] . '</option>';
@@ -196,60 +194,31 @@ class acp_ban
 			if ($time_length == 0)
 			{
 				// Banned permanently
-				$ban_length[$row['ban_id']] = $user->lang['PERMANENT'];
+				$ban_length = $user->lang['PERMANENT'];
 			}
 			else if (isset($ban_end_text[$time_length]))
 			{
 				// Banned for a given duration
-				$ban_length[$row['ban_id']] = sprintf($user->lang['BANNED_UNTIL_DURATION'], $ban_end_text[$time_length], $user->format_date($row['ban_end'], false, true));
+				$ban_length = $user->lang('BANNED_UNTIL_DURATION', $ban_end_text[$time_length], $user->format_date($row['ban_end'], false, true));
 			}
 			else
 			{
 				// Banned until given date
-				$ban_length[$row['ban_id']] = sprintf($user->lang['BANNED_UNTIL_DATE'], $user->format_date($row['ban_end'], false, true));
+				$ban_length = $user->lang('BANNED_UNTIL_DATE', $user->format_date($row['ban_end'], false, true));
 			}
 
-			$ban_reasons[$row['ban_id']] = $row['ban_reason'];
-			$ban_give_reasons[$row['ban_id']] = $row['ban_give_reason'];
+			$template->assign_block_vars('bans', array(
+				'BAN_ID'		=> (int) $row['ban_id'],
+				'LENGTH'		=> $ban_length,
+				'A_LENGTH'		=> addslashes($ban_length),
+				'REASON'		=> $row['ban_reason'],
+				'A_REASON'		=> addslashes($row['ban_reason']),
+				'GIVE_REASON'	=> $row['ban_give_reason'],
+				'A_GIVE_REASON'	=> addslashes($row['ban_give_reason']),
+			));
 		}
 		$db->sql_freeresult($result);
 
-		if (sizeof($ban_length))
-		{
-			foreach ($ban_length as $ban_id => $length)
-			{
-				$template->assign_block_vars('ban_length', array(
-					'BAN_ID'	=> (int) $ban_id,
-					'LENGTH'	=> $length,
-					'A_LENGTH'	=> addslashes($length),
-				));
-			}
-		}
-
-		if (sizeof($ban_reasons))
-		{
-			foreach ($ban_reasons as $ban_id => $reason)
-			{
-				$template->assign_block_vars('ban_reason', array(
-					'BAN_ID'	=> $ban_id,
-					'REASON'	=> $reason,
-					'A_REASON'	=> addslashes($reason),
-				));
-			}
-		}
-
-		if (sizeof($ban_give_reasons))
-		{
-			foreach ($ban_give_reasons as $ban_id => $reason)
-			{
-				$template->assign_block_vars('ban_give_reason', array(
-					'BAN_ID'	=> $ban_id,
-					'REASON'	=> $reason,
-					'A_REASON'	=> addslashes($reason),
-				));
-			}
-		}
-
 		$options = '';
 		if ($excluded_options)
 		{
diff --git a/phpBB/includes/acp/acp_board.php b/phpBB/includes/acp/acp_board.php
index 1811748c2f..f2707f15ca 100644
--- a/phpBB/includes/acp/acp_board.php
+++ b/phpBB/includes/acp/acp_board.php
@@ -925,7 +925,7 @@ class acp_board
 		{
 			$user->timezone = new DateTimeZone($config['board_timezone']);
 		}
-		catch (Exception $e)
+		catch (\Exception $e)
 		{
 			// If the board timezone is invalid, we just use the users timezone.
 		}
diff --git a/phpBB/includes/acp/acp_extensions.php b/phpBB/includes/acp/acp_extensions.php
index aba9caaece..9bdd8eb458 100644
--- a/phpBB/includes/acp/acp_extensions.php
+++ b/phpBB/includes/acp/acp_extensions.php
@@ -137,6 +137,12 @@ class acp_extensions
 					trigger_error($user->lang['EXTENSION_NOT_AVAILABLE'] . adm_back_link($this->u_action), E_USER_WARNING);
 				}
 
+				$extension = $phpbb_extension_manager->get_extension($ext_name);
+				if (!$extension->is_enableable())
+				{
+					trigger_error($user->lang['EXTENSION_NOT_ENABLEABLE'] . adm_back_link($this->u_action), E_USER_WARNING);
+				}
+
 				if ($phpbb_extension_manager->is_enabled($ext_name))
 				{
 					redirect($this->u_action);
@@ -162,6 +168,12 @@ class acp_extensions
 					trigger_error($user->lang['EXTENSION_NOT_AVAILABLE'] . adm_back_link($this->u_action), E_USER_WARNING);
 				}
 
+				$extension = $phpbb_extension_manager->get_extension($ext_name);
+				if (!$extension->is_enableable())
+				{
+					trigger_error($user->lang['EXTENSION_NOT_ENABLEABLE'] . adm_back_link($this->u_action), E_USER_WARNING);
+				}
+
 				if ($phpbb_extension_manager->is_enabled($ext_name))
 				{
 					redirect($this->u_action);
diff --git a/phpBB/includes/acp/acp_main.php b/phpBB/includes/acp/acp_main.php
index 0d0d49774c..2a28226d6c 100644
--- a/phpBB/includes/acp/acp_main.php
+++ b/phpBB/includes/acp/acp_main.php
@@ -26,7 +26,7 @@ class acp_main
 	function main($id, $mode)
 	{
 		global $config, $db, $cache, $user, $auth, $template, $request;
-		global $phpbb_root_path, $phpbb_admin_path, $phpEx, $phpbb_container;
+		global $phpbb_root_path, $phpbb_admin_path, $phpEx, $phpbb_container, $phpbb_dispatcher;
 
 		// Show restore permissions notice
 		if ($user->data['user_perm_from'] && $auth->acl_get('a_switchperm'))
@@ -445,6 +445,14 @@ class acp_main
 			));
 		}
 
+		/**
+		* Notice admin
+		*
+		* @event core.acp_main_notice
+		* @since 3.1.0-RC3
+		*/
+		$phpbb_dispatcher->dispatch('core.acp_main_notice');
+
 		// Get forum statistics
 		$total_posts = $config['num_posts'];
 		$total_topics = $config['num_topics'];
diff --git a/phpBB/includes/acp/acp_modules.php b/phpBB/includes/acp/acp_modules.php
index 5932f4cddd..ea6b388328 100644
--- a/phpBB/includes/acp/acp_modules.php
+++ b/phpBB/includes/acp/acp_modules.php
@@ -766,7 +766,8 @@ class acp_modules
 	/**
 	* Update/Add module
 	*
-	* @param bool $run_inline if set to true errors will be returned and no logs being written
+	* @param array	&$module_data	The module data
+	* @param bool	$run_inline 	if set to true errors will be returned and no logs being written
 	*/
 	function update_module_data(&$module_data, $run_inline = false)
 	{
diff --git a/phpBB/includes/acp/acp_ranks.php b/phpBB/includes/acp/acp_ranks.php
index fdbd0e0a1d..5885de57ec 100644
--- a/phpBB/includes/acp/acp_ranks.php
+++ b/phpBB/includes/acp/acp_ranks.php
@@ -25,7 +25,7 @@ class acp_ranks
 
 	function main($id, $mode)
 	{
-		global $db, $user, $auth, $template, $cache, $request;
+		global $db, $user, $auth, $template, $cache, $request, $phpbb_dispatcher;
 		global $config, $phpbb_root_path, $phpbb_admin_path, $phpEx;
 
 		$user->add_lang('acp/posting');
@@ -73,6 +73,17 @@ class acp_ranks
 					'rank_image'		=> htmlspecialchars_decode($rank_image)
 				);
 
+				/**
+				* Modify the SQL array when saving a rank
+				*
+				* @event core.acp_ranks_save_modify_sql_ary
+				* @var	int		rank_id		The ID of the rank (if available)
+				* @var	array	sql_ary		Array with the rank's data
+				* @since 3.1.0-RC3
+				*/
+				$vars = array('rank_id', 'sql_ary');
+				extract($phpbb_dispatcher->trigger_event('core.acp_ranks_save_modify_sql_ary', compact($vars)));
+
 				if ($rank_id)
 				{
 					$sql = 'UPDATE ' . RANKS_TABLE . ' SET ' . $db->sql_build_array('UPDATE', $sql_ary) . " WHERE rank_id = $rank_id";
@@ -202,7 +213,7 @@ class acp_ranks
 				$filename_list = '<option value=""' . (($edit_img == '') ? ' selected="selected"' : '') . '>----------</option>' . $filename_list;
 				unset($existing_imgs, $imglist);
 
-				$template->assign_vars(array(
+				$tpl_ary = array(
 					'S_EDIT'			=> true,
 					'U_BACK'			=> $this->u_action,
 					'RANKS_PATH'		=> $phpbb_root_path . $config['ranks_path'],
@@ -212,9 +223,21 @@ class acp_ranks
 					'S_FILENAME_LIST'	=> $filename_list,
 					'RANK_IMAGE'		=> ($edit_img) ? $phpbb_root_path . $config['ranks_path'] . '/' . $edit_img : htmlspecialchars($phpbb_admin_path) . 'images/spacer.gif',
 					'S_SPECIAL_RANK'	=> (isset($ranks['rank_special']) && $ranks['rank_special']) ? true : false,
-					'MIN_POSTS'			=> (isset($ranks['rank_min']) && !$ranks['rank_special']) ? $ranks['rank_min'] : 0)
+					'MIN_POSTS'			=> (isset($ranks['rank_min']) && !$ranks['rank_special']) ? $ranks['rank_min'] : 0,
 				);
 
+				/**
+				* Modify the template output array for editing/adding ranks
+				*
+				* @event core.acp_ranks_edit_modify_tpl_ary
+				* @var	array	ranks		Array with the rank's data
+				* @var	array	tpl_ary		Array with the rank's template data
+				* @since 3.1.0-RC3
+				*/
+				$vars = array('ranks', 'tpl_ary');
+				extract($phpbb_dispatcher->trigger_event('core.acp_ranks_edit_modify_tpl_ary', compact($vars)));
+
+				$template->assign_vars($tpl_ary);
 				return;
 
 			break;
@@ -231,7 +254,7 @@ class acp_ranks
 
 		while ($row = $db->sql_fetchrow($result))
 		{
-			$template->assign_block_vars('ranks', array(
+			$rank_row = array(
 				'S_RANK_IMAGE'		=> ($row['rank_image']) ? true : false,
 				'S_SPECIAL_RANK'	=> ($row['rank_special']) ? true : false,
 
@@ -240,8 +263,21 @@ class acp_ranks
 				'MIN_POSTS'			=> $row['rank_min'],
 
 				'U_EDIT'			=> $this->u_action . '&amp;action=edit&amp;id=' . $row['rank_id'],
-				'U_DELETE'			=> $this->u_action . '&amp;action=delete&amp;id=' . $row['rank_id'])
+				'U_DELETE'			=> $this->u_action . '&amp;action=delete&amp;id=' . $row['rank_id'],
 			);
+
+			/**
+			* Modify the template output array for each listed rank
+			*
+			* @event core.acp_ranks_list_modify_rank_row
+			* @var	array	row			Array with the rank's data
+			* @var	array	rank_row	Array with the rank's template data
+			* @since 3.1.0-RC3
+			*/
+			$vars = array('row', 'rank_row');
+			extract($phpbb_dispatcher->trigger_event('core.acp_ranks_list_modify_rank_row', compact($vars)));
+
+			$template->assign_block_vars('ranks', $rank_row);
 		}
 		$db->sql_freeresult($result);
 
diff --git a/phpBB/includes/acp/acp_styles.php b/phpBB/includes/acp/acp_styles.php
index 4cc93e5670..2a02e3e845 100644
--- a/phpBB/includes/acp/acp_styles.php
+++ b/phpBB/includes/acp/acp_styles.php
@@ -804,7 +804,7 @@ class acp_styles
 	*
 	* @param array $styles Styles list, passed as reference
 	* @param string $name Name of parent style
-	* @param string $level Styles tree level
+	* @param int $level Styles tree level
 	*/
 	protected function show_available_child_styles(&$styles, $name, $level)
 	{
@@ -888,7 +888,7 @@ class acp_styles
 	* Show item in styles list
 	*
 	* @param array $style style row
-	* @param array $level style inheritance level
+	* @param int $level style inheritance level
 	*/
 	protected function list_style(&$style, $level)
 	{
diff --git a/phpBB/includes/diff/diff.php b/phpBB/includes/diff/diff.php
index dd0fbcee02..d307880c4b 100644
--- a/phpBB/includes/diff/diff.php
+++ b/phpBB/includes/diff/diff.php
@@ -46,8 +46,9 @@ class diff
 	/**
 	* Computes diffs between sequences of strings.
 	*
-	* @param array $from_lines  An array of strings. Typically these are lines from a file.
-	* @param array $to_lines    An array of strings.
+	* @param array	&$from_content	An array of strings. Typically these are lines from a file.
+	* @param array	&$to_content	An array of strings.
+	* @param bool	$preserve_cr	If true, \r is replaced by a new line in the diff output
 	*/
 	function diff(&$from_content, &$to_content, $preserve_cr = true)
 	{
@@ -491,9 +492,11 @@ class diff3 extends diff
 	/**
 	* Computes diff between 3 sequences of strings.
 	*
-	* @param array $orig    The original lines to use.
-	* @param array $final1  The first version to compare to.
-	* @param array $final2  The second version to compare to.
+	* @param array &$orig		The original lines to use.
+	* @param array &$final1		The first version to compare to.
+	* @param array &$final2		The second version to compare to.
+	* @param bool $preserve_cr	If true, \r\n and bare \r are replaced by a new line
+	*							in the diff output
 	*/
 	function diff3(&$orig, &$final1, &$final2, $preserve_cr = true)
 	{
diff --git a/phpBB/includes/functions.php b/phpBB/includes/functions.php
index 8b9969aced..4318b20b97 100644
--- a/phpBB/includes/functions.php
+++ b/phpBB/includes/functions.php
@@ -1031,7 +1031,7 @@ function phpbb_get_timezone_identifiers($selected_timezone)
 			$validate_timezone = new DateTimeZone($selected_timezone);
 			$timezones[] = $selected_timezone;
 		}
-		catch (Exception $e)
+		catch (\Exception $e)
 		{
 		}
 	}
@@ -1067,7 +1067,7 @@ function phpbb_timezone_select($user, $default = '', $truncate = false)
 			$offset_string = phpbb_format_timezone_offset($offset);
 			$timezones['GMT' . $offset_string . ' - ' . $timezone] = array(
 				'tz'		=> $timezone,
-				'offest'	=> 'GMT' . $offset_string,
+				'offset'	=> 'GMT' . $offset_string,
 				'current'	=> $current_time,
 			);
 			if ($timezone === $default)
@@ -1084,14 +1084,14 @@ function phpbb_timezone_select($user, $default = '', $truncate = false)
 
 	foreach ($timezones as $timezone)
 	{
-		if ($opt_group != $timezone['offest'])
+		if ($opt_group != $timezone['offset'])
 		{
 			$tz_select .= ($opt_group) ? '</optgroup>' : '';
-			$tz_select .= '<optgroup label="' . $timezone['offest'] . ' - ' . $timezone['current'] . '">';
-			$opt_group = $timezone['offest'];
+			$tz_select .= '<optgroup label="' . $timezone['offset'] . ' - ' . $timezone['current'] . '">';
+			$opt_group = $timezone['offset'];
 
-			$selected = ($default_offset == $timezone['offest']) ? ' selected="selected"' : '';
-			$tz_dates .= '<option value="' . $timezone['offest'] . ' - ' . $timezone['current'] . '"' . $selected . '>' . $timezone['offest'] . ' - ' . $timezone['current'] . '</option>';
+			$selected = ($default_offset == $timezone['offset']) ? ' selected="selected"' : '';
+			$tz_dates .= '<option value="' . $timezone['offset'] . ' - ' . $timezone['current'] . '"' . $selected . '>' . $timezone['offset'] . ' - ' . $timezone['current'] . '</option>';
 		}
 
 		$label = $timezone['tz'];
@@ -1099,7 +1099,7 @@ function phpbb_timezone_select($user, $default = '', $truncate = false)
 		{
 			$label = $user->lang['timezones'][$label];
 		}
-		$title = $timezone['offest'] . ' - ' . $label;
+		$title = $timezone['offset'] . ' - ' . $label;
 
 		if ($truncate)
 		{
@@ -2210,7 +2210,7 @@ function generate_board_url($without_script_path = false)
 */
 function redirect($url, $return = false, $disable_cd_check = false)
 {
-	global $db, $cache, $config, $user, $phpbb_root_path, $phpbb_filesystem, $phpbb_path_helper, $phpEx;
+	global $db, $cache, $config, $user, $phpbb_root_path, $phpbb_filesystem, $phpbb_path_helper, $phpEx, $phpbb_dispatcher;
 
 	$failover_flag = false;
 
@@ -2219,11 +2219,6 @@ function redirect($url, $return = false, $disable_cd_check = false)
 		$user->add_lang('common');
 	}
 
-	if (!$return)
-	{
-		garbage_collection();
-	}
-
 	// Make sure no &amp;'s are in, this will break the redirect
 	$url = str_replace('&amp;', '&', $url);
 
@@ -2298,10 +2293,26 @@ function redirect($url, $return = false, $disable_cd_check = false)
 		trigger_error('INSECURE_REDIRECT', E_USER_ERROR);
 	}
 
+	/**
+	* Execute code and/or overwrite redirect()
+	*
+	* @event core.functions.redirect
+	* @var	string	url					The url
+	* @var	bool	return				If true, do not redirect but return the sanitized URL.
+	* @var	bool	disable_cd_check	If true, redirect() will redirect to an external domain. If false, the redirect point to the boards url if it does not match the current domain.
+	* @since 3.1.0-RC3
+	*/
+	$vars = array('url', 'return', 'disable_cd_check');
+	extract($phpbb_dispatcher->trigger_event('core.functions.redirect', compact($vars)));
+
 	if ($return)
 	{
 		return $url;
 	}
+	else
+	{
+		garbage_collection();
+	}
 
 	// Redirect via an HTML form for PITA webservers
 	if (@preg_match('#Microsoft|WebSTAR|Xitami#', getenv('SERVER_SOFTWARE')))
diff --git a/phpBB/includes/functions_acp.php b/phpBB/includes/functions_acp.php
index 8453da6e6e..ad5a359710 100644
--- a/phpBB/includes/functions_acp.php
+++ b/phpBB/includes/functions_acp.php
@@ -240,7 +240,6 @@ function build_cfg_template($tpl_type, $key, &$new, $config_key, $vars)
 		case 'range':
 		case 'search':
 		case 'tel':
-		case 'url':
 		case 'week':
 			$size = (int) $tpl_type[1];
 			$maxlength = (int) $tpl_type[2];
diff --git a/phpBB/includes/functions_display.php b/phpBB/includes/functions_display.php
index 68b1356297..62f218cf60 100644
--- a/phpBB/includes/functions_display.php
+++ b/phpBB/includes/functions_display.php
@@ -1063,7 +1063,8 @@ function display_reasons($reason_id = 0)
 function display_user_activity(&$userdata)
 {
 	global $auth, $template, $db, $user;
-	global $phpbb_root_path, $phpEx, $phpbb_container;
+	global $phpbb_root_path, $phpEx;
+	global $phpbb_container, $phpbb_dispatcher;
 
 	// Do not display user activity for users having more than 5000 posts...
 	if ($userdata['user_posts'] > 5000)
@@ -1134,6 +1135,18 @@ function display_user_activity(&$userdata)
 		}
 	}
 
+	/**
+	* Alter list of forums and topics to display as active
+	*
+	* @event core.display_user_activity_modify_actives
+	* @var	array	userdata						User's data
+	* @var	array	active_f_row					List of active forums
+	* @var	array	active_t_row					List of active posts
+	* @since 3.1.0-RC3
+	*/
+	$vars = array('userdata', 'active_f_row', 'active_t_row');
+	extract($phpbb_dispatcher->trigger_event('core.display_user_activity_modify_actives', compact($vars)));
+
 	$userdata['active_t_row'] = $active_t_row;
 	$userdata['active_f_row'] = $active_f_row;
 
@@ -1413,7 +1426,7 @@ function get_user_rank($user_rank, $user_posts, &$rank_title, &$rank_img, &$rank
 * @param string $param_key Either topic_id or post_id
 * @param string $param_val The value of the topic or post id
 * @param string $phpbb_root_path The root path of the phpBB installation
-* @param string $phpEx The PHP extension
+* @param string $phpEx The PHP file extension
 *
 * @return array Array containing the link and the type of compression
 */
diff --git a/phpBB/includes/functions_install.php b/phpBB/includes/functions_install.php
index 06f49e4b50..28cc603bdb 100644
--- a/phpBB/includes/functions_install.php
+++ b/phpBB/includes/functions_install.php
@@ -266,7 +266,7 @@ function connect_check_db($error_connect, &$error, $dbms_details, $table_prefix,
 	if (is_array($db->sql_connect($dbhost, $dbuser, $dbpasswd, $dbname, $dbport, false, true)))
 	{
 		$db_error = $db->sql_error();
-		$error[] = $lang['INST_ERR_DB_CONNECT'] . '<br />' . (($db_error['message']) ? $db_error['message'] : $lang['INST_ERR_DB_NO_ERROR']);
+		$error[] = $lang['INST_ERR_DB_CONNECT'] . '<br />' . (($db_error['message']) ? utf8_convert_message($db_error['message']) : $lang['INST_ERR_DB_NO_ERROR']);
 	}
 	else
 	{
@@ -449,6 +449,7 @@ function phpbb_create_config_file_data($data, $dbms, $debug = false, $debug_cont
 	}
 
 	$config_data .= "\n@define('PHPBB_INSTALLED', true);\n";
+	$config_data .= "// @define('PHPBB_DISPLAY_LOAD_TIME', true);\n";
 
 	if ($debug)
 	{
diff --git a/phpBB/includes/functions_module.php b/phpBB/includes/functions_module.php
index 86439ea03f..397e6401ff 100644
--- a/phpBB/includes/functions_module.php
+++ b/phpBB/includes/functions_module.php
@@ -541,7 +541,9 @@ class p_master
 	*
 	* This method loads a given module, passing it the relevant id and mode.
 	*
-	* @param string $mode mode, as passed through to the module
+	* @param string|false $mode mode, as passed through to the module
+	* @param string|false $module_url If supplied, we use this module url
+	* @param bool $execute_module If true, at the end we execute the main method for the new instance
 	*/
 	function load_active($mode = false, $module_url = false, $execute_module = true)
 	{
@@ -1040,19 +1042,45 @@ class p_master
 	*/
 	function add_mod_info($module_class)
 	{
-		global $user, $phpEx;
-
-		global $phpbb_extension_manager;
+		global $config, $user, $phpEx, $phpbb_extension_manager;
 
 		$finder = $phpbb_extension_manager->get_finder();
 
-		$lang_files = $finder
+		// We grab the language files from the default, English and user's language.
+		// So we can fall back to the other files like we do when using add_lang()
+		$default_lang_files = $english_lang_files = $user_lang_files = array();
+
+		// Search for board default language if it's not the user language
+		if ($config['default_lang'] != $user->lang_name)
+		{
+			$default_lang_files = $finder
+				->prefix('info_' . strtolower($module_class) . '_')
+				->suffix(".$phpEx")
+				->extension_directory('/language/' . basename($config['default_lang']))
+				->core_path('language/' . basename($config['default_lang']) . '/mods/')
+				->find();
+		}
+
+		// Search for english, if its not the default or user language
+		if ($config['default_lang'] != 'en' && $user->lang_name != 'en')
+		{
+			$english_lang_files = $finder
+				->prefix('info_' . strtolower($module_class) . '_')
+				->suffix(".$phpEx")
+				->extension_directory('/language/en')
+				->core_path('language/en/mods/')
+				->find();
+		}
+
+		// Find files in the user's language
+		$user_lang_files = $finder
 			->prefix('info_' . strtolower($module_class) . '_')
 			->suffix(".$phpEx")
 			->extension_directory('/language/' . $user->lang_name)
 			->core_path('language/' . $user->lang_name . '/mods/')
 			->find();
 
+		$lang_files = array_unique(array_merge($user_lang_files, $english_lang_files, $default_lang_files));
 		foreach ($lang_files as $lang_file => $ext_name)
 		{
 			$user->add_lang_ext($ext_name, $lang_file);
diff --git a/phpBB/includes/functions_posting.php b/phpBB/includes/functions_posting.php
index 0b37af0ee0..fb09bc7057 100644
--- a/phpBB/includes/functions_posting.php
+++ b/phpBB/includes/functions_posting.php
@@ -398,14 +398,15 @@ function posting_gen_topic_types($forum_id, $cur_topic_type = POST_NORMAL)
 * @param string			$local_storage	The path to the local file
 * @param bool			$is_message		Whether it is a PM or not
 * @param \filespec		$local_filedata	A filespec object created for the local file
+* @param \phpbb\mimetype\guesser	$mimetype_guesser	The mimetype guesser object if used
 * @param \phpbb\plupload\plupload	$plupload		The plupload object if one is being used
 *
 * @return object filespec
 */
-function upload_attachment($form_name, $forum_id, $local = false, $local_storage = '', $is_message = false, $local_filedata = false, \phpbb\plupload\plupload $plupload = null)
+function upload_attachment($form_name, $forum_id, $local = false, $local_storage = '', $is_message = false, $local_filedata = false, \phpbb\mimetype\guesser $mimetype_guesser = null, \phpbb\plupload\plupload $plupload = null)
 {
 	global $auth, $user, $config, $db, $cache;
-	global $phpbb_root_path, $phpEx;
+	global $phpbb_root_path, $phpEx, $phpbb_dispatcher;
 
 	$filedata = array(
 		'error'	=> array()
@@ -434,7 +435,7 @@ function upload_attachment($form_name, $forum_id, $local = false, $local_storage
 	$extensions = $cache->obtain_attach_extensions((($is_message) ? false : (int) $forum_id));
 	$upload->set_allowed_extensions(array_keys($extensions['_allowed_']));
 
-	$file = ($local) ? $upload->local_upload($local_storage, $local_filedata) : $upload->form_upload($form_name, $plupload);
+	$file = ($local) ? $upload->local_upload($local_storage, $local_filedata, $mimetype_guesser) : $upload->form_upload($form_name, $mimetype_guesser, $plupload);
 
 	if ($file->init_error)
 	{
@@ -506,6 +507,20 @@ function upload_attachment($form_name, $forum_id, $local = false, $local_storage
 	$filedata['real_filename'] = $file->get('uploadname');
 	$filedata['filetime'] = time();
 
+	/**
+	* 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
+	*/
+	$vars = array(
+		'filedata',
+		'is_image',
+	);
+	extract($phpbb_dispatcher->trigger_event('core.modify_uploaded_file', compact($vars)));
+
 	// Check our complete quota
 	if ($config['attachment_quota'])
 	{
@@ -893,7 +908,7 @@ function posting_gen_attachment_entry($attachment_data, &$filename_data, $show_a
 function load_drafts($topic_id = 0, $forum_id = 0, $id = 0, $pm_action = '', $msg_id = 0)
 {
 	global $user, $db, $template, $auth;
-	global $phpbb_root_path, $phpEx;
+	global $phpbb_root_path, $phpbb_dispatcher, $phpEx;
 
 	$topic_ids = $forum_ids = $draft_rows = array();
 
@@ -936,7 +951,7 @@ function load_drafts($topic_id = 0, $forum_id = 0, $id = 0, $pm_action = '', $ms
 	$topic_rows = array();
 	if (sizeof($topic_ids))
 	{
-		$sql = 'SELECT topic_id, forum_id, topic_title
+		$sql = 'SELECT topic_id, forum_id, topic_title, topic_poster
 			FROM ' . TOPICS_TABLE . '
 			WHERE ' . $db->sql_in_set('topic_id', array_unique($topic_ids));
 		$result = $db->sql_query($sql);
@@ -947,6 +962,20 @@ function load_drafts($topic_id = 0, $forum_id = 0, $id = 0, $pm_action = '', $ms
 		}
 		$db->sql_freeresult($result);
 	}
+
+	/**
+	* Drafts found and their topics
+	* Edit $draft_rows in order to add or remove drafts loaded
+	*
+	* @event core.load_drafts_draft_list_result
+	* @var	array	draft_rows			The drafts query result. Includes its forum id and everything about the draft
+	* @var	array	topic_ids			The list of topics got from the topics table
+	* @var	array	topic_rows			The topics that draft_rows references
+	* @since 3.1.0-RC3
+	*/
+	$vars = array('draft_rows', 'topic_ids', 'topic_rows');
+	extract($phpbb_dispatcher->trigger_event('core.load_drafts_draft_list_result', compact($vars)));
+
 	unset($topic_ids);
 
 	$template->assign_var('S_SHOW_DRAFTS', true);
@@ -1402,20 +1431,7 @@ function delete_post($forum_id, $topic_id, $post_id, &$data, $is_soft = false, $
 	{
 		if (!$is_soft)
 		{
-			if ($data['post_visibility'] == ITEM_APPROVED)
-			{
-				$phpbb_content_visibility->remove_post_from_statistic($data, $sql_data);
-			}
-			else if ($data['post_visibility'] == ITEM_UNAPPROVED || $data['post_visibility'] == ITEM_REAPPROVE)
-			{
-				$sql_data[FORUMS_TABLE] = (($sql_data[FORUMS_TABLE]) ? $sql_data[FORUMS_TABLE] . ', ' : '') . 'forum_posts_unapproved = forum_posts_unapproved - 1';
-				$sql_data[TOPICS_TABLE] = (($sql_data[TOPICS_TABLE]) ? $sql_data[TOPICS_TABLE] . ', ' : '') . 'topic_posts_unapproved = topic_posts_unapproved - 1';
-			}
-			else if ($data['post_visibility'] == ITEM_DELETED)
-			{
-				$sql_data[FORUMS_TABLE] = (($sql_data[FORUMS_TABLE]) ? $sql_data[FORUMS_TABLE] . ', ' : '') . 'forum_posts_softdeleted = forum_posts_softdeleted - 1';
-				$sql_data[TOPICS_TABLE] = (($sql_data[TOPICS_TABLE]) ? $sql_data[TOPICS_TABLE] . ', ' : '') . 'topic_posts_softdeleted = topic_posts_softdeleted - 1';
-			}
+			$phpbb_content_visibility->remove_post_from_statistic($data, $sql_data);
 		}
 
 		$sql = 'SELECT 1 AS has_attachments
@@ -2373,12 +2389,31 @@ function submit_post($mode, $subject, $username, $topic_type, &$poll, &$data, $u
 	* event is to modify the return URL ($url).
 	*
 	* @event core.submit_post_end
-	* @var	string		url						The "Return to topic" URL
-	* @var	array		data					Array of post data about the
-	*											submitted post
+	* @var	string	mode				Variable containing posting mode value
+	* @var	string	subject				Variable containing post subject value
+	* @var	string	username			Variable containing post author name
+	* @var	int		topic_type			Variable containing topic type value
+	* @var	array	poll				Array with the poll data for the post
+	* @var	array	data				Array with the data for the post
+	* @var	bool	update_message		Flag indicating if the post will be updated
+	* @var	bool	update_search_index	Flag indicating if the search index will be updated
+	* @var	string	url					The "Return to topic" URL
+	*
 	* @since 3.1.0-a3
+	* @change 3.1.0-RC3 Added vars mode, subject, username, topic_type,
+	*		poll, update_message, update_search_index
 	*/
-	$vars = array('url', 'data');
+	$vars = array(
+		'mode',
+		'subject',
+		'username',
+		'topic_type',
+		'poll',
+		'data',
+		'update_message',
+		'update_search_index',
+		'url',
+	);
 	extract($phpbb_dispatcher->trigger_event('core.submit_post_end', compact($vars)));
 
 	return $url;
diff --git a/phpBB/includes/functions_privmsgs.php b/phpBB/includes/functions_privmsgs.php
index e60311f8ab..488f46a398 100644
--- a/phpBB/includes/functions_privmsgs.php
+++ b/phpBB/includes/functions_privmsgs.php
@@ -212,7 +212,7 @@ function get_folder($user_id, $folder_id = false)
 		);
 	}
 
-	if ($folder_id !== false && !isset($folder[$folder_id]))
+	if ($folder_id !== false && $folder_id !== PRIVMSGS_HOLD_BOX && !isset($folder[$folder_id]))
 	{
 		trigger_error('UNKNOWN_FOLDER');
 	}
diff --git a/phpBB/includes/functions_upload.php b/phpBB/includes/functions_upload.php
index 0847c3a550..e973e6ec28 100644
--- a/phpBB/includes/functions_upload.php
+++ b/phpBB/includes/functions_upload.php
@@ -53,10 +53,16 @@ class filespec
 	protected $plupload;
 
 	/**
+	 * phpBB Mimetype guesser
+	 * @var \phpbb\mimetype\guesser
+	 */
+	protected $mimetype_guesser;
+
+	/**
 	* File Class
 	* @access private
 	*/
-	function filespec($upload_ary, $upload_namespace, \phpbb\plupload\plupload $plupload = null)
+	function filespec($upload_ary, $upload_namespace, \phpbb\mimetype\guesser $mimetype_guesser = null, \phpbb\plupload\plupload $plupload = null)
 	{
 		if (!isset($upload_ary))
 		{
@@ -76,7 +82,7 @@ class filespec
 
 		if (!$this->mimetype)
 		{
-			$this->mimetype = 'application/octetstream';
+			$this->mimetype = 'application/octet-stream';
 		}
 
 		$this->extension = strtolower(self::get_extension($this->realname));
@@ -90,6 +96,7 @@ class filespec
 		$this->local = (isset($upload_ary['local_mode'])) ? true : false;
 		$this->upload = $upload_namespace;
 		$this->plupload = $plupload;
+		$this->mimetype_guesser = $mimetype_guesser;
 	}
 
 	/**
@@ -97,6 +104,7 @@ class filespec
 	*
 	* @param real|unique|unique_ext $mode real creates a realname, filtering some characters, lowering every character. Unique creates an unique filename
 	* @param string $prefix Prefix applied to filename
+	* @param string $user_id The user_id is only needed for when cleaning a user's avatar
 	* @access public
 	*/
 	function clean_filename($mode = 'unique', $prefix = '', $user_id = '')
@@ -215,25 +223,19 @@ class filespec
 	}
 
 	/**
-	* Get mimetype. Utilize mime_content_type if the function exist.
-	* Not used at the moment...
+	* Get mimetype
+	*
+	* @param string $filename Filename that needs to be checked
+	* @return string Mimetype of supplied filename
 	*/
 	function get_mimetype($filename)
 	{
-		$mimetype = '';
-
-		if (function_exists('mime_content_type'))
-		{
-			$mimetype = mime_content_type($filename);
-		}
-
-		// Some browsers choke on a mimetype of application/octet-stream
-		if (!$mimetype || $mimetype == 'application/octet-stream')
+		if ($this->mimetype_guesser !== null)
 		{
-			$mimetype = 'application/octetstream';
+			$this->mimetype = $this->mimetype_guesser->guess($filename);
 		}
 
-		return $mimetype;
+		return $this->mimetype;
 	}
 
 	/**
@@ -276,8 +278,9 @@ class filespec
 	* Move file to destination folder
 	* The phpbb_root_path variable will be applied to the destination path
 	*
-	* @param string $destination_path Destination path, for example $config['avatar_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 $chmod Permission mask for chmodding the file after a successful move. The mode entered here reflects the mode defined by {@link phpbb_chmod()}
 	*
 	* @access public
@@ -372,6 +375,9 @@ class filespec
 		// Try to get real filesize from destination folder
 		$this->filesize = (@filesize($this->destination_file)) ? @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;
@@ -498,6 +504,8 @@ class fileupload
 	* @param int $min_height Minimum image height (only checked for images)
 	* @param int $max_width Maximum image width (only checked for images)
 	* @param int $max_height Maximum image height (only checked for images)
+	* @param bool|array $disallowed_content If enabled, the first 256 bytes of the file must not
+	*										contain any of its values. Defaults to false.
 	*
 	*/
 	function fileupload($error_prefix = '', $allowed_extensions = false, $max_filesize = false, $min_width = false, $min_height = false, $max_width = false, $max_height = false, $disallowed_content = false)
@@ -583,7 +591,7 @@ class fileupload
 	* @return object $file Object "filespec" is returned, all further operations can be done with this object
 	* @access public
 	*/
-	function form_upload($form_name, \phpbb\plupload\plupload $plupload = null)
+	function form_upload($form_name, \phpbb\mimetype\guesser $mimetype_guesser = null, \phpbb\plupload\plupload $plupload = null)
 	{
 		global $user, $request;
 
@@ -599,7 +607,7 @@ class fileupload
 			}
 		}
 
-		$file = new filespec($upload, $this, $plupload);
+		$file = new filespec($upload, $this, $mimetype_guesser, $plupload);
 
 		if ($file->init_error)
 		{
@@ -659,7 +667,7 @@ class fileupload
 	/**
 	* Move file from another location to phpBB
 	*/
-	function local_upload($source_file, $filedata = false)
+	function local_upload($source_file, $filedata = false, \phpbb\mimetype\guesser $mimetype_guesser = null)
 	{
 		global $user, $request;
 
@@ -672,20 +680,6 @@ class fileupload
 		{
 			$upload['name'] = utf8_basename($source_file);
 			$upload['size'] = 0;
-			$mimetype = '';
-
-			if (function_exists('mime_content_type'))
-			{
-				$mimetype = mime_content_type($source_file);
-			}
-
-			// Some browsers choke on a mimetype of application/octet-stream
-			if (!$mimetype || $mimetype == 'application/octet-stream')
-			{
-				$mimetype = 'application/octetstream';
-			}
-
-			$upload['type'] = $mimetype;
 		}
 		else
 		{
@@ -694,7 +688,7 @@ class fileupload
 			$upload['type'] = $filedata['type'];
 		}
 
-		$file = new filespec($upload, $this);
+		$file = new filespec($upload, $this, $mimetype_guesser);
 
 		if ($file->init_error)
 		{
@@ -752,7 +746,7 @@ class fileupload
 	* @return object $file Object "filespec" is returned, all further operations can be done with this object
 	* @access public
 	*/
-	function remote_upload($upload_url)
+	function remote_upload($upload_url, \phpbb\mimetype\guesser $mimetype_guesser = null)
 	{
 		global $user, $phpbb_root_path;
 
@@ -931,7 +925,7 @@ class fileupload
 
 		$upload_ary['tmp_name'] = $filename;
 
-		$file = new filespec($upload_ary, $this);
+		$file = new filespec($upload_ary, $this, $mimetype_guesser);
 		$this->common_checks($file);
 
 		return $file;
diff --git a/phpBB/includes/functions_url_matcher.php b/phpBB/includes/functions_url_matcher.php
index 7e17d1c2d8..b965046aad 100644
--- a/phpBB/includes/functions_url_matcher.php
+++ b/phpBB/includes/functions_url_matcher.php
@@ -29,7 +29,7 @@ if (!defined('IN_PHPBB'))
 * @param \phpbb\extension\manager $manager Extension manager
 * @param RequestContext $context Symfony RequestContext object
 * @param string $root_path Root path
-* @param string $php_ext PHP extension
+* @param string $php_ext PHP file extension
 * @return null
 */
 function phpbb_get_url_matcher(\phpbb\extension\manager $manager, RequestContext $context, $root_path, $php_ext)
@@ -52,7 +52,7 @@ function phpbb_get_url_matcher(\phpbb\extension\manager $manager, RequestContext
 *
 * @param \phpbb\extension\manager $manager Extension manager
 * @param string $root_path Root path
-* @param string $php_ext PHP extension
+* @param string $php_ext PHP file extension
 * @return null
 */
 function phpbb_create_dumped_url_matcher(\phpbb\extension\manager $manager, $root_path, $php_ext)
@@ -88,7 +88,7 @@ function phpbb_create_url_matcher(\phpbb\extension\manager $manager, RequestCont
 *
 * @param RequestContext $context Symfony RequestContext object
 * @param string $root_path Root path
-* @param string $php_ext PHP extension
+* @param string $php_ext PHP file extension
 * @return phpbb_url_matcher
 */
 function phpbb_load_url_matcher(RequestContext $context, $root_path, $php_ext)
@@ -103,7 +103,7 @@ function phpbb_load_url_matcher(RequestContext $context, $root_path, $php_ext)
 * The class is automatically dumped to the cache directory
 *
 * @param string $root_path Root path
-* @param string $php_ext PHP extension
+* @param string $php_ext PHP file extension
 * @return bool True if it exists, false if not
 */
 function phpbb_url_matcher_dumped($root_path, $php_ext)
diff --git a/phpBB/includes/mcp/mcp_front.php b/phpBB/includes/mcp/mcp_front.php
index 04206a6fcd..98773d5b0e 100644
--- a/phpBB/includes/mcp/mcp_front.php
+++ b/phpBB/includes/mcp/mcp_front.php
@@ -178,6 +178,18 @@ function mcp_front_view($id, $mode, $action)
 
 					'ORDER_BY'	=> 'p.post_time DESC',
 				);
+
+				/**
+				* Alter sql query to get latest reported posts
+				*
+				* @event core.mcp_front_reports_listing_query_before
+				* @var	int		sql_ary						Associative array with the query to be executed
+				* @var	array	forum_list					List of forums that contain the posts
+				* @since 3.1.0-RC3
+				*/
+				$vars = array('sql_ary', 'forum_list');
+				extract($phpbb_dispatcher->trigger_event('core.mcp_front_reports_listing_query_before', compact($vars)));
+
 				$sql = $db->sql_build_query('SELECT', $sql_ary);
 				$result = $db->sql_query_limit($sql, 5);
 
diff --git a/phpBB/includes/message_parser.php b/phpBB/includes/message_parser.php
index da27d8900d..92ace7b585 100644
--- a/phpBB/includes/message_parser.php
+++ b/phpBB/includes/message_parser.php
@@ -1083,6 +1083,12 @@ class parse_message extends bbcode_firstpass
 	protected $plupload;
 
 	/**
+	* The mimetype guesser object used for attachment mimetypes
+	* @var \phpbb\mimetype\guesser
+	*/
+	protected $mimetype_guesser;
+
+	/**
 	* Init - give message here or manually
 	*/
 	function parse_message($message = '')
@@ -1560,7 +1566,7 @@ class parse_message extends bbcode_firstpass
 			{
 				if ($num_attachments < $cfg['max_attachments'] || $auth->acl_gets('m_', 'a_', $forum_id))
 				{
-					$filedata = upload_attachment($form_name, $forum_id, false, '', $is_message, false, $this->plupload);
+					$filedata = upload_attachment($form_name, $forum_id, false, '', $is_message, false, $this->mimetype_guesser, $this->plupload);
 					$error = array_merge($error, $filedata['error']);
 
 					if (!sizeof($error))
@@ -1792,4 +1798,16 @@ class parse_message extends bbcode_firstpass
 	{
 		$this->plupload = $plupload;
 	}
+
+	/**
+	* Setter function for passing the mimetype_guesser object
+	*
+	* @param \phpbb\mimetype\guesser $mimetype_guesser The mimetype_guesser object
+	*
+	* @return null
+	*/
+	public function set_mimetype_guesser(\phpbb\mimetype\guesser $mimetype_guesser)
+	{
+		$this->mimetype_guesser = $mimetype_guesser;
+	}
 }
diff --git a/phpBB/includes/ucp/ucp_prefs.php b/phpBB/includes/ucp/ucp_prefs.php
index df1e722fa4..a8c8920a7d 100644
--- a/phpBB/includes/ucp/ucp_prefs.php
+++ b/phpBB/includes/ucp/ucp_prefs.php
@@ -43,7 +43,7 @@ class ucp_prefs
 					'notifymethod'	=> request_var('notifymethod', $user->data['user_notify_type']),
 					'dateformat'	=> request_var('dateformat', $user->data['user_dateformat'], true),
 					'lang'			=> basename(request_var('lang', $user->data['user_lang'])),
-					'style'			=> request_var('style', (int) $user->data['user_style']),
+					'user_style'		=> request_var('user_style', (int) $user->data['user_style']),
 					'tz'			=> request_var('tz', $user->data['user_timezone']),
 
 					'viewemail'		=> request_var('viewemail', (bool) $user->data['user_allow_viewemail']),
@@ -76,11 +76,11 @@ class ucp_prefs
 				{
 					if ($config['override_user_style'])
 					{
-						$data['style'] = (int) $config['default_style'];
+						$data['user_style'] = (int) $config['default_style'];
 					}
-					else if (!phpbb_style_is_active($data['style']))
+					else if (!phpbb_style_is_active($data['user_style']))
 					{
-						$data['style'] = (int) $user->data['user_style'];
+						$data['user_style'] = (int) $user->data['user_style'];
 					}
 
 					$error = validate_data($data, array(
@@ -107,7 +107,7 @@ class ucp_prefs
 							'user_dateformat'		=> $data['dateformat'],
 							'user_lang'				=> $data['lang'],
 							'user_timezone'			=> $data['tz'],
-							'user_style'			=> $data['style'],
+							'user_style'			=> $data['user_style'],
 						);
 
 						/**
@@ -207,7 +207,7 @@ class ucp_prefs
 					'S_MORE_STYLES'			=> $s_more_styles,
 
 					'S_LANG_OPTIONS'		=> language_select($data['lang']),
-					'S_STYLE_OPTIONS'		=> ($config['override_user_style']) ? '' : style_select($data['style']),
+					'S_STYLE_OPTIONS'		=> ($config['override_user_style']) ? '' : style_select($data['user_style']),
 					'S_TZ_OPTIONS'			=> $timezone_selects['tz_select'],
 					'S_TZ_DATE_OPTIONS'		=> $timezone_selects['tz_dates'],
 					'S_CAN_HIDE_ONLINE'		=> ($auth->acl_get('u_hideonline')) ? true : false,