Merge branch 'develop' of https://github.com/phpbb/phpbb3 into ticket/10411-2

* 'develop' of https://github.com/phpbb/phpbb3: (497 commits) [ticket/10986] message.id fallback to SERVER_NAME or phpbb.generated [ticket/11358] Changed the name of post parameter. [ticket/11358] Changed the action parameter value to represent the link. [ticket/11358] Enabled link making all users default for a group. [ticket/11358] Removed redundant code and referred proper variable. [ticket/11358] Success message even without selecting a user. [ticket/11355] Referred proper variable when validating selection. [ticket/11355] Wrong error message when no user is selected. [ticket/10896] Add missing email validation lost in develop merge [ticket/7262] Add note about set_config() not updating is_dynamic. [ticket/7262] Add $is_dynamic example to set_config() and set_config_count(). [ticket/7262] Backport set_config() and set_config_count() docs from develop. [ticket/11122] Move rxu to 'Former Contributors' section. [ticket/11122] Add EXreaction to docs/AUTHORS. [ticket/11298] Fix typo in language key; EXTENSIONS -> EXTENSION [ticket/11361] Make sure that array passed to strtr() has the proper format. [ticket/11342] Fix "unexpected token" syntax error [ticket/11179] remove extra & in function call [ticket/11179] correct start parameter in sphinx search [ticket/11179] correct start parameter in native author search ... Conflicts: phpBB/config/services.yml phpBB/includes/functions_user.php phpBB/install/schemas/firebird_schema.sql phpBB/install/schemas/mssql_schema.sql phpBB/install/schemas/mysql_40_schema.sql phpBB/install/schemas/mysql_41_schema.sql phpBB/install/schemas/oracle_schema.sql phpBB/install/schemas/postgres_schema.sql phpBB/install/schemas/sqlite_schema.sql
author: Joas Schilling <nickvergessen@gmx.de> 2013-02-25 21:03:34 +0100
committer: Joas Schilling <nickvergessen@gmx.de> 2013-02-25 21:03:34 +0100
commit: 8c6a1e50f502385c2d75920dd4914928d8311b80 (patch)
tree: 57a8e6af9ec0077323054aa93151e0a9c048dfb4 /phpBB/includes
parent: 1d7b082a6fa05d5760ef15ef8bf78cd3a1d204cf (diff)
parent: 9b38c4579e80a9013b6ecad71fce38e930b67838 (diff)
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87 files changed, 6005 insertions, 2290 deletions
diff --git a/phpBB/includes/acp/acp_board.php b/phpBB/includes/acp/acp_board.php
index 322e1c55d8..960cc89db5 100644
--- a/phpBB/includes/acp/acp_board.php
+++ b/phpBB/includes/acp/acp_board.php
@@ -413,8 +413,8 @@ class acp_board
 						'board_email_form'		=> array('lang' => 'BOARD_EMAIL_FORM',		'validate' => 'bool',	'type' => 'radio:enabled_disabled', 'explain' => true),
 						'email_function_name'	=> array('lang' => 'EMAIL_FUNCTION_NAME',	'validate' => 'string',	'type' => 'text:20:50', 'explain' => true),
 						'email_package_size'	=> array('lang' => 'EMAIL_PACKAGE_SIZE',	'validate' => 'int:0',	'type' => 'text:5:5', 'explain' => true),
-						'board_contact'			=> array('lang' => 'CONTACT_EMAIL',			'validate' => 'string',	'type' => 'text:25:100', 'explain' => true),
-						'board_email'			=> array('lang' => 'ADMIN_EMAIL',			'validate' => 'string',	'type' => 'text:25:100', 'explain' => true),
+						'board_contact'			=> array('lang' => 'CONTACT_EMAIL',			'validate' => 'email',	'type' => 'text:25:100', 'explain' => true),
+						'board_email'			=> array('lang' => 'ADMIN_EMAIL',			'validate' => 'email',	'type' => 'text:25:100', 'explain' => true),
 						'board_email_sig'		=> array('lang' => 'EMAIL_SIG',				'validate' => 'string',	'type' => 'textarea:5:30', 'explain' => true),
 						'board_hide_emails'		=> array('lang' => 'BOARD_HIDE_EMAILS',		'validate' => 'bool',	'type' => 'radio:yes_no', 'explain' => true),
 
diff --git a/phpBB/includes/acp/acp_extensions.php b/phpBB/includes/acp/acp_extensions.php
index a0bcf62ecc..24211196bd 100644
--- a/phpBB/includes/acp/acp_extensions.php
+++ b/phpBB/includes/acp/acp_extensions.php
@@ -37,7 +37,7 @@ class acp_extensions
 		$this->template = $template;
 		$this->user = $user;
 
-		$user->add_lang(array('install', 'acp/extensions'));
+		$user->add_lang(array('install', 'acp/extensions', 'migrator'));
 
 		$this->page_title = 'ACP_EXTENSIONS';
 
@@ -103,11 +103,18 @@ class acp_extensions
 					trigger_error($user->lang['EXTENSION_NOT_AVAILABLE'] . adm_back_link($this->u_action));
 				}
 
-				if ($phpbb_extension_manager->enable_step($ext_name))
+				try
 				{
-					$template->assign_var('S_NEXT_STEP', true);
+					if ($phpbb_extension_manager->enable_step($ext_name))
+					{
+						$template->assign_var('S_NEXT_STEP', true);
 
-					meta_refresh(0, $this->u_action . '&amp;action=enable&amp;ext_name=' . urlencode($ext_name));
+						meta_refresh(0, $this->u_action . '&amp;action=enable&amp;ext_name=' . urlencode($ext_name));
+					}
+				}
+				catch (phpbb_db_migration_exception $e)
+				{
+					$template->assign_var('MIGRATOR_ERROR', $e->getLocalisedMessage($user));
 				}
 
 				$this->tpl_name = 'acp_ext_enable';
@@ -156,11 +163,18 @@ class acp_extensions
 			break;
 
 			case 'purge':
-				if ($phpbb_extension_manager->purge_step($ext_name))
+				try
 				{
-					$template->assign_var('S_NEXT_STEP', true);
+					if ($phpbb_extension_manager->purge_step($ext_name))
+					{
+						$template->assign_var('S_NEXT_STEP', true);
 
-					meta_refresh(0, $this->u_action . '&amp;action=purge&amp;ext_name=' . urlencode($ext_name));
+						meta_refresh(0, $this->u_action . '&amp;action=purge&amp;ext_name=' . urlencode($ext_name));
+					}
+				}
+				catch (phpbb_db_migration_exception $e)
+				{
+					$template->assign_var('MIGRATOR_ERROR', $e->getLocalisedMessage($user));
 				}
 
 				$this->tpl_name = 'acp_ext_purge';
diff --git a/phpBB/includes/acp/acp_forums.php b/phpBB/includes/acp/acp_forums.php
index c6dbf5eb9c..7e8d5d8388 100644
--- a/phpBB/includes/acp/acp_forums.php
+++ b/phpBB/includes/acp/acp_forums.php
@@ -206,7 +206,7 @@ class acp_forums
 							($action != 'edit' || empty($forum_id) || ($auth->acl_get('a_fauth') && $auth->acl_get('a_authusers') && $auth->acl_get('a_authgroups') && $auth->acl_get('a_mauth'))))
 						{
 							copy_forum_permissions($forum_perm_from, $forum_data['forum_id'], ($action == 'edit') ? true : false);
-							cache_moderators();
+							phpbb_cache_moderators($db, $cache, $auth);
 							$copied_permissions = true;
 						}
 /* Commented out because of questionable UI workflow - re-visit for 3.0.7
@@ -266,7 +266,7 @@ class acp_forums
 					add_log('admin', 'LOG_FORUM_' . strtoupper($action), $row['forum_name'], $move_forum_name);
 					$cache->destroy('sql', FORUMS_TABLE);
 				}
-				
+
 				if ($request->is_ajax())
 				{
 					$json_response = new phpbb_json_response;
@@ -768,7 +768,7 @@ class acp_forums
 				if (!empty($forum_perm_from) && $forum_perm_from != $forum_id)
 				{
 					copy_forum_permissions($forum_perm_from, $forum_id, true);
-					cache_moderators();
+					phpbb_cache_moderators($db, $cache, $auth);
 					$auth->acl_clear_prefetch();
 					$cache->destroy('sql', FORUMS_TABLE);
 
diff --git a/phpBB/includes/acp/acp_groups.php b/phpBB/includes/acp/acp_groups.php
index 46b5a0fa4a..805fc28520 100644
--- a/phpBB/includes/acp/acp_groups.php
+++ b/phpBB/includes/acp/acp_groups.php
@@ -128,13 +128,34 @@ class acp_groups
 				{
 					trigger_error($user->lang['NO_GROUP'] . adm_back_link($this->u_action), E_USER_WARNING);
 				}
+				else if (empty($mark_ary))
+				{
+					trigger_error($user->lang['NO_USERS'] . adm_back_link($this->u_action . '&amp;action=list&amp;g=' . $group_id), E_USER_WARNING);
+				}
 
 				if (confirm_box(true))
 				{
 					$group_name = ($group_row['group_type'] == GROUP_SPECIAL) ? $user->lang['G_' . $group_row['group_name']] : $group_row['group_name'];
+					group_user_attributes('default', $group_id, $mark_ary, false, $group_name, $group_row);	
+					trigger_error($user->lang['GROUP_DEFS_UPDATED'] . adm_back_link($this->u_action . '&amp;action=list&amp;g=' . $group_id));
+				}
+				else
+				{
+					confirm_box(false, $user->lang['CONFIRM_OPERATION'], build_hidden_fields(array(
+						'mark'		=> $mark_ary,
+						'g'			=> $group_id,
+						'i'			=> $id,
+						'mode'		=> $mode,
+						'action'	=> $action))
+					);
+				}
 
-					if (!sizeof($mark_ary))
+				break;
+			case 'set_default_on_all':
+					if (confirm_box(true))
 					{
+						$group_name = ($group_row['group_type'] == GROUP_SPECIAL) ? $user->lang['G_' . $group_row['group_name']] : $group_row['group_name'];
+							
 						$start = 0;
 
 						do
@@ -165,28 +186,25 @@ class acp_groups
 							$db->sql_freeresult($result);
 						}
 						while ($start);
+							
+						trigger_error($user->lang['GROUP_DEFS_UPDATED'] . adm_back_link($this->u_action . '&amp;action=list&amp;g=' . $group_id));
 					}
 					else
 					{
-						group_user_attributes('default', $group_id, $mark_ary, false, $group_name, $group_row);
+						confirm_box(false, $user->lang['CONFIRM_OPERATION'], build_hidden_fields(array(
+							'mark'		=> $mark_ary,
+							'g'			=> $group_id,
+							'i'			=> $id,
+							'mode'		=> $mode,
+							'action'	=> $action))
+						);
 					}
-
-					trigger_error($user->lang['GROUP_DEFS_UPDATED'] . adm_back_link($this->u_action . '&amp;action=list&amp;g=' . $group_id));
-				}
-				else
-				{
-					confirm_box(false, $user->lang['CONFIRM_OPERATION'], build_hidden_fields(array(
-						'mark'		=> $mark_ary,
-						'g'			=> $group_id,
-						'i'			=> $id,
-						'mode'		=> $mode,
-						'action'	=> $action))
-					);
-				}
-
 			break;
-
 			case 'deleteusers':
+				if (empty($mark_ary))
+				{
+					trigger_error($user->lang['NO_USERS'] . adm_back_link($this->u_action . '&amp;action=list&amp;g=' . $group_id), E_USER_WARNING);
+				}
 			case 'delete':
 				if (!$group_id)
 				{
@@ -441,7 +459,7 @@ class acp_groups
 
 						foreach ($test_variables as $test => $type)
 						{
-							if (isset($submit_ary[$test]) && ($action == 'add' || $group_row['group_' . $test] != $submit_ary[$test] || in_array($test, $set_attributes)))
+							if (isset($submit_ary[$test]) && ($action == 'add' || $group_row['group_' . $test] != $submit_ary[$test] || isset($group_attributes['group_avatar']) && strpos($test, 'avatar') === 0 || in_array($test, $set_attributes)))
 							{
 								settype($submit_ary[$test], $type);
 								$group_attributes['group_' . $test] = $group_row['group_' . $test] = $submit_ary[$test];
@@ -700,7 +718,7 @@ class acp_groups
 					'U_ACTION'			=> $this->u_action . "&amp;g=$group_id",
 					'U_BACK'			=> $this->u_action,
 					'U_FIND_USERNAME'	=> append_sid("{$phpbb_root_path}memberlist.$phpEx", 'mode=searchuser&amp;form=list&amp;field=usernames'),
-					'U_DEFAULT_ALL'		=> "{$this->u_action}&amp;action=default&amp;g=$group_id",
+					'U_DEFAULT_ALL'		=> "{$this->u_action}&amp;action=set_default_on_all&amp;g=$group_id",
 				));
 
 				// Grab the members
diff --git a/phpBB/includes/acp/acp_main.php b/phpBB/includes/acp/acp_main.php
index d419bc3b99..c44bc1b8a6 100644
--- a/phpBB/includes/acp/acp_main.php
+++ b/phpBB/includes/acp/acp_main.php
@@ -24,7 +24,7 @@ class acp_main
 
 	function main($id, $mode)
 	{
-		global $config, $db, $user, $auth, $template, $request;
+		global $config, $db, $cache, $user, $auth, $template, $request;
 		global $phpbb_root_path, $phpbb_admin_path, $phpEx;
 
 		// Show restore permissions notice
@@ -129,7 +129,7 @@ class acp_main
 						set_config('record_online_users', 1, true);
 						set_config('record_online_date', time(), true);
 						add_log('admin', 'LOG_RESET_ONLINE');
-						
+
 						if ($request->is_ajax())
 						{
 							trigger_error('RESET_ONLINE_SUCCESS');
@@ -184,7 +184,7 @@ class acp_main
 						update_last_username();
 
 						add_log('admin', 'LOG_RESYNC_STATS');
-						
+
 						if ($request->is_ajax())
 						{
 							trigger_error('RESYNC_STATS_SUCCESS');
@@ -251,7 +251,7 @@ class acp_main
 						}
 
 						add_log('admin', 'LOG_RESYNC_POSTCOUNTS');
-						
+
 						if ($request->is_ajax())
 						{
 							trigger_error('RESYNC_POSTCOUNTS_SUCCESS');
@@ -266,7 +266,7 @@ class acp_main
 
 						set_config('board_startdate', time() - 1);
 						add_log('admin', 'LOG_RESET_DATE');
-						
+
 						if ($request->is_ajax())
 						{
 							trigger_error('RESET_DATE_SUCCESS');
@@ -346,7 +346,7 @@ class acp_main
 						}
 
 						add_log('admin', 'LOG_RESYNC_POST_MARKING');
-						
+
 						if ($request->is_ajax())
 						{
 							trigger_error('RESYNC_POST_MARKING_SUCCESS');
@@ -359,10 +359,10 @@ class acp_main
 
 						// Clear permissions
 						$auth->acl_clear_prefetch();
-						cache_moderators();
+						phpbb_cache_moderators($db, $cache, $auth);
 
 						add_log('admin', 'LOG_PURGE_CACHE');
-						
+
 						if ($request->is_ajax())
 						{
 							trigger_error('PURGE_CACHE_SUCCESS');
@@ -413,7 +413,7 @@ class acp_main
 						$db->sql_query($sql);
 
 						add_log('admin', 'LOG_PURGE_SESSIONS');
-						
+
 						if ($request->is_ajax())
 						{
 							trigger_error('PURGE_SESSIONS_SUCCESS');
diff --git a/phpBB/includes/acp/acp_modules.php b/phpBB/includes/acp/acp_modules.php
index 8528dc91c4..52a82004e8 100644
--- a/phpBB/includes/acp/acp_modules.php
+++ b/phpBB/includes/acp/acp_modules.php
@@ -740,15 +740,15 @@ class acp_modules
 	*/
 	function remove_cache_file()
 	{
-		global $cache;
+		global $phpbb_container;
 
 		// Sanitise for future path use, it's escaped as appropriate for queries
 		$p_class = str_replace(array('.', '/', '\\'), '', basename($this->module_class));
 
-		$cache->destroy('_modules_' . $p_class);
+		$phpbb_container->get('cache.driver')->destroy('_modules_' . $p_class);
 
 		// Additionally remove sql cache
-		$cache->destroy('sql', MODULES_TABLE);
+		$phpbb_container->get('cache.driver')->destroy('sql', MODULES_TABLE);
 	}
 
 	/**
diff --git a/phpBB/includes/acp/acp_permissions.php b/phpBB/includes/acp/acp_permissions.php
index dd071074de..a64765f4f5 100644
--- a/phpBB/includes/acp/acp_permissions.php
+++ b/phpBB/includes/acp/acp_permissions.php
@@ -656,7 +656,7 @@ class acp_permissions
 	*/
 	function set_permissions($mode, $permission_type, &$auth_admin, &$user_id, &$group_id)
 	{
-		global $user, $auth;
+		global $db, $cache, $user, $auth;
 		global $request;
 
 		$psubmit = request_var('psubmit', array(0 => array(0 => 0)));
@@ -726,13 +726,13 @@ class acp_permissions
 		// Do we need to recache the moderator lists?
 		if ($permission_type == 'm_')
 		{
-			cache_moderators();
+			phpbb_cache_moderators($db, $cache, $auth);
 		}
 
 		// Remove users who are now moderators or admins from everyones foes list
 		if ($permission_type == 'm_' || $permission_type == 'a_')
 		{
-			update_foes($group_id, $user_id);
+			phpbb_update_foes($db, $auth, $group_id, $user_id);
 		}
 
 		$this->log_action($mode, 'add', $permission_type, $ug_type, $ug_id, $forum_id);
@@ -745,7 +745,7 @@ class acp_permissions
 	*/
 	function set_all_permissions($mode, $permission_type, &$auth_admin, &$user_id, &$group_id)
 	{
-		global $user, $auth;
+		global $db, $cache, $user, $auth;
 		global $request;
 
 		// User or group to be set?
@@ -794,13 +794,13 @@ class acp_permissions
 		// Do we need to recache the moderator lists?
 		if ($permission_type == 'm_')
 		{
-			cache_moderators();
+			phpbb_cache_moderators($db, $cache, $auth);
 		}
 
 		// Remove users who are now moderators or admins from everyones foes list
 		if ($permission_type == 'm_' || $permission_type == 'a_')
 		{
-			update_foes($group_id, $user_id);
+			phpbb_update_foes($db, $auth, $group_id, $user_id);
 		}
 
 		$this->log_action($mode, 'add', $permission_type, $ug_type, $ug_ids, $forum_ids);
@@ -858,7 +858,7 @@ class acp_permissions
 	*/
 	function remove_permissions($mode, $permission_type, &$auth_admin, &$user_id, &$group_id, &$forum_id)
 	{
-		global $user, $db, $auth;
+		global $user, $db, $cache, $auth;
 
 		// User or group to be set?
 		$ug_type = (sizeof($user_id)) ? 'user' : 'group';
@@ -874,7 +874,7 @@ class acp_permissions
 		// Do we need to recache the moderator lists?
 		if ($permission_type == 'm_')
 		{
-			cache_moderators();
+			phpbb_cache_moderators($db, $cache, $auth);
 		}
 
 		$this->log_action($mode, 'del', $permission_type, $ug_type, (($ug_type == 'user') ? $user_id : $group_id), (sizeof($forum_id) ? $forum_id : array(0 => 0)));
@@ -952,12 +952,7 @@ class acp_permissions
 
 		if ($user_id != $user->data['user_id'])
 		{
-			$sql = 'SELECT user_id, username, user_permissions, user_type
-				FROM ' . USERS_TABLE . '
-				WHERE user_id = ' . $user_id;
-			$result = $db->sql_query($sql);
-			$userdata = $db->sql_fetchrow($result);
-			$db->sql_freeresult($result);
+			$userdata = $auth->obtain_user_data($user_id);
 		}
 		else
 		{
@@ -1172,7 +1167,7 @@ class acp_permissions
 	*/
 	function copy_forum_permissions()
 	{
-		global $auth, $cache, $template, $user;
+		global $db, $auth, $cache, $template, $user;
 
 		$user->add_lang('acp/forums');
 
@@ -1187,7 +1182,7 @@ class acp_permissions
 			{
 				if (copy_forum_permissions($src, $dest))
 				{
-					cache_moderators();
+					phpbb_cache_moderators($db, $cache, $auth);
 
 					$auth->acl_clear_prefetch();
 					$cache->destroy('sql', FORUMS_TABLE);
diff --git a/phpBB/includes/acp/acp_ranks.php b/phpBB/includes/acp/acp_ranks.php
index d9ed5b17f1..6b06d03f52 100644
--- a/phpBB/includes/acp/acp_ranks.php
+++ b/phpBB/includes/acp/acp_ranks.php
@@ -71,7 +71,7 @@ class acp_ranks
 					'rank_min'			=> $min_posts,
 					'rank_image'		=> htmlspecialchars_decode($rank_image)
 				);
-				
+
 				if ($rank_id)
 				{
 					$sql = 'UPDATE ' . RANKS_TABLE . ' SET ' . $db->sql_build_array('UPDATE', $sql_ary) . " WHERE rank_id = $rank_id";
@@ -122,7 +122,7 @@ class acp_ranks
 					$cache->destroy('_ranks');
 
 					add_log('admin', 'LOG_RANK_REMOVED', $rank_title);
-					
+
 					if ($request->is_ajax())
 					{
 						$json_response = new phpbb_json_response;
@@ -151,7 +151,7 @@ class acp_ranks
 			case 'add':
 
 				$data = $ranks = $existing_imgs = array();
-				
+
 				$sql = 'SELECT *
 					FROM ' . RANKS_TABLE . '
 					ORDER BY rank_min ASC, rank_special ASC';
@@ -209,17 +209,17 @@ class acp_ranks
 
 					'RANK_TITLE'		=> (isset($ranks['rank_title'])) ? $ranks['rank_title'] : '',
 					'S_FILENAME_LIST'	=> $filename_list,
-					'RANK_IMAGE'		=> ($edit_img) ? $phpbb_root_path . $config['ranks_path'] . '/' . $edit_img : $phpbb_admin_path . 'images/spacer.gif',
+					'RANK_IMAGE'		=> ($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)
 				);
-						
+
 
 				return;
 
 			break;
 		}
-	
+
 		$template->assign_vars(array(
 			'U_ACTION'		=> $this->u_action)
 		);
@@ -241,7 +241,7 @@ class acp_ranks
 
 				'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'])
-			);	
+			);
 		}
 		$db->sql_freeresult($result);
 
diff --git a/phpBB/includes/acp/acp_styles.php b/phpBB/includes/acp/acp_styles.php
index db77825ae7..266495972b 100644
--- a/phpBB/includes/acp/acp_styles.php
+++ b/phpBB/includes/acp/acp_styles.php
@@ -137,11 +137,13 @@ class acp_styles
 	*/
 	protected function action_cache()
 	{
+		global $db, $cache, $auth;
+
 		$this->cache->purge();
 
 		// Clear permissions
 		$this->auth->acl_clear_prefetch();
-		cache_moderators();
+		phpbb_cache_moderators($db, $cache, $auth);
 
 		add_log('admin', 'LOG_PURGE_CACHE');
 
diff --git a/phpBB/includes/acp/info/acp_extensions.php b/phpBB/includes/acp/info/acp_extensions.php
index f5953fb1dd..174b365af0 100644
--- a/phpBB/includes/acp/info/acp_extensions.php
+++ b/phpBB/includes/acp/info/acp_extensions.php
@@ -16,10 +16,10 @@ class acp_extensions_info
 	{
 		return array(
 			'filename'	=> 'acp_extensions',
-			'title'		=> 'ACP_EXTENSIONS',
+			'title'		=> 'ACP_EXTENSION_MANAGEMENT',
 			'version'	=> '1.0.0',
 			'modes'		=> array(
-				'main'		=> array('title' => 'ACP_EXTENSIONS', 'auth' => 'acl_a_extensions', 'cat' => array('ACP_GENERAL_TASKS')),
+				'main'		=> array('title' => 'ACP_EXTENSIONS', 'auth' => 'acl_a_extensions', 'cat' => array('ACP_EXTENSION_MANAGEMENT')),
 			),
 		);
 	}
diff --git a/phpBB/includes/acp/info/acp_language.php b/phpBB/includes/acp/info/acp_language.php
index 85dfb119ea..7f33a22fa6 100644
--- a/phpBB/includes/acp/info/acp_language.php
+++ b/phpBB/includes/acp/info/acp_language.php
@@ -19,7 +19,7 @@ class acp_language_info
 			'title'		=> 'ACP_LANGUAGE',
 			'version'	=> '1.0.0',
 			'modes'		=> array(
-				'lang_packs'		=> array('title' => 'ACP_LANGUAGE_PACKS', 'auth' => 'acl_a_language', 'cat' => array('ACP_GENERAL_TASKS')),
+				'lang_packs'		=> array('title' => 'ACP_LANGUAGE_PACKS', 'auth' => 'acl_a_language', 'cat' => array('ACP_LANGUAGE')),
 			),
 		);
 	}
diff --git a/phpBB/includes/auth/auth.php b/phpBB/includes/auth/auth.php
index e3bccaf47b..2535247571 100644
--- a/phpBB/includes/auth/auth.php
+++ b/phpBB/includes/auth/auth.php
@@ -103,6 +103,26 @@ class phpbb_auth
 	}
 
 	/**
+	* Retrieves data wanted by acl function from the database for the
+	* specified user.
+	*
+	* @param int $user_id User ID
+	* @return array User attributes
+	*/
+	public function obtain_user_data($user_id)
+	{
+		global $db;
+
+		$sql = 'SELECT user_id, username, user_permissions, user_type
+			FROM ' . USERS_TABLE . '
+			WHERE user_id = ' . $user_id;
+		$result = $db->sql_query($sql);
+		$user_data = $db->sql_fetchrow($result);
+		$db->sql_freeresult($result);
+		return $user_data;
+	}
+
+	/**
 	* Fill ACL array with relevant bitstrings from user_permissions column
 	* @access private
 	*/
@@ -191,7 +211,7 @@ class phpbb_auth
 
 	/**
 	* Get forums with the specified permission setting
-	* if the option is prefixed with !, then the result becomes nagated
+	* if the option is prefixed with !, then the result becomes negated
 	*
 	* @param bool $clean set to true if only values needs to be returned which are set/unset
 	*/
diff --git a/phpBB/includes/bbcode.php b/phpBB/includes/bbcode.php
index b9ffa8091c..e8681420d4 100644
--- a/phpBB/includes/bbcode.php
+++ b/phpBB/includes/bbcode.php
@@ -134,7 +134,7 @@ class bbcode
 
 			$style_resource_locator = new phpbb_style_resource_locator();
 			$style_path_provider = new phpbb_style_extension_path_provider($phpbb_extension_manager, new phpbb_style_path_provider());
-			$template = new phpbb_template($phpbb_root_path, $phpEx, $config, $user, $style_resource_locator, new phpbb_template_context());
+			$template = new phpbb_template($phpbb_root_path, $phpEx, $config, $user, $style_resource_locator, new phpbb_template_context(), $phpbb_extension_manager);
 			$style = new phpbb_style($phpbb_root_path, $phpEx, $config, $user, $style_resource_locator, $style_path_provider, $template);
 			$style->set_style();
 			$template->set_filenames(array('bbcode.html' => 'bbcode.html'));
diff --git a/phpBB/includes/cache/driver/file.php b/phpBB/includes/cache/driver/file.php
index 691abe0438..85decbe3e8 100644
--- a/phpBB/includes/cache/driver/file.php
+++ b/phpBB/includes/cache/driver/file.php
@@ -367,12 +367,10 @@ class phpbb_cache_driver_file extends phpbb_cache_driver_base
 	}
 
 	/**
-	* Save sql query
+	* {@inheritDoc}
 	*/
-	function sql_save($query, $query_result, $ttl)
+	function sql_save(phpbb_db_driver $db, $query, $query_result, $ttl)
 	{
-		global $db;
-
 		// Remove extra spaces and tabs
 		$query = preg_replace('/[\n\r\s\t]+/', ' ', $query);
 
diff --git a/phpBB/includes/cache/driver/interface.php b/phpBB/includes/cache/driver/interface.php
index d403bbcd71..53f684d1c8 100644
--- a/phpBB/includes/cache/driver/interface.php
+++ b/phpBB/includes/cache/driver/interface.php
@@ -85,6 +85,7 @@ interface phpbb_cache_driver_interface
 	* result to persistent storage. In other words, there is no need
 	* to call save() afterwards.
 	*
+	* @param phpbb_db_driver $db	Database connection
 	* @param string $query			SQL query, should be used for generating storage key
 	* @param mixed $query_result	The result from dbal::sql_query, to be passed to
 	* 								dbal::sql_fetchrow to get all rows and store them
@@ -95,7 +96,7 @@ interface phpbb_cache_driver_interface
 	* 								representing the query should be returned. Otherwise
 	* 								the original $query_result should be returned.
 	*/
-	public function sql_save($query, $query_result, $ttl);
+	public function sql_save(phpbb_db_driver $db, $query, $query_result, $ttl);
 
 	/**
 	* Check if result for a given SQL query exists in cache.
diff --git a/phpBB/includes/cache/driver/memory.php b/phpBB/includes/cache/driver/memory.php
index c39f9f7850..f77a1df316 100644
--- a/phpBB/includes/cache/driver/memory.php
+++ b/phpBB/includes/cache/driver/memory.php
@@ -283,12 +283,10 @@ abstract class phpbb_cache_driver_memory extends phpbb_cache_driver_base
 	}
 
 	/**
-	* Save sql query
+	* {@inheritDoc}
 	*/
-	function sql_save($query, $query_result, $ttl)
+	function sql_save(phpbb_db_driver $db, $query, $query_result, $ttl)
 	{
-		global $db;
-
 		// Remove extra spaces and tabs
 		$query = preg_replace('/[\n\r\s\t]+/', ' ', $query);
 		$hash = md5($query);
diff --git a/phpBB/includes/cache/driver/null.php b/phpBB/includes/cache/driver/null.php
index 687604d14f..2fadc27ba3 100644
--- a/phpBB/includes/cache/driver/null.php
+++ b/phpBB/includes/cache/driver/null.php
@@ -105,9 +105,9 @@ class phpbb_cache_driver_null extends phpbb_cache_driver_base
 	}
 
 	/**
-	* Save sql query
+	* {@inheritDoc}
 	*/
-	function sql_save($query, $query_result, $ttl)
+	function sql_save(phpbb_db_driver $db, $query, $query_result, $ttl)
 	{
 		return $query_result;
 	}
diff --git a/phpBB/includes/cache/service.php b/phpBB/includes/cache/service.php
index e63ec6e33a..69c5e0fdd0 100644
--- a/phpBB/includes/cache/service.php
+++ b/phpBB/includes/cache/service.php
@@ -21,16 +21,57 @@ if (!defined('IN_PHPBB'))
 */
 class phpbb_cache_service
 {
-	private $driver;
+	/**
+	* Cache driver.
+	*
+	* @var phpbb_cache_driver_interface
+	*/
+	protected $driver;
+
+	/**
+	* The config.
+	*
+	* @var phpbb_config
+	*/
+	protected $config;
+
+	/**
+	* Database connection.
+	*
+	* @var phpbb_db_driver
+	*/
+	protected $db;
+
+	/**
+	* Root path.
+	*
+	* @var string
+	*/
+	protected $phpbb_root_path;
+
+	/**
+	* PHP extension.
+	*
+	* @var string
+	*/
+	protected $php_ext;
 
 	/**
 	* Creates a cache service around a cache driver
 	*
 	* @param phpbb_cache_driver_interface $driver The cache driver
+	* @param phpbb_config $config The config
+	* @param phpbb_db_driver $db Database connection
+	* @param string $phpbb_root_path Root path
+	* @param string $php_ext PHP extension
 	*/
-	public function __construct(phpbb_cache_driver_interface $driver = null)
+	public function __construct(phpbb_cache_driver_interface $driver, phpbb_config $config, phpbb_db_driver $db, $phpbb_root_path, $php_ext)
 	{
 		$this->set_driver($driver);
+		$this->config = $config;
+		$this->db = $db;
+		$this->phpbb_root_path = $phpbb_root_path;
+		$this->php_ext = $php_ext;
 	}
 
 	/**
@@ -64,21 +105,19 @@ class phpbb_cache_service
 	*/
 	function obtain_word_list()
 	{
-		global $db;
-
 		if (($censors = $this->driver->get('_word_censors')) === false)
 		{
 			$sql = 'SELECT word, replacement
 				FROM ' . WORDS_TABLE;
-			$result = $db->sql_query($sql);
+			$result = $this->db->sql_query($sql);
 
 			$censors = array();
-			while ($row = $db->sql_fetchrow($result))
+			while ($row = $this->db->sql_fetchrow($result))
 			{
 				$censors['match'][] = get_censor_preg_expression($row['word']);
 				$censors['replace'][] = $row['replacement'];
 			}
-			$db->sql_freeresult($result);
+			$this->db->sql_freeresult($result);
 
 			$this->driver->put('_word_censors', $censors);
 		}
@@ -93,23 +132,21 @@ class phpbb_cache_service
 	{
 		if (($icons = $this->driver->get('_icons')) === false)
 		{
-			global $db;
-
 			// Topic icons
 			$sql = 'SELECT *
 				FROM ' . ICONS_TABLE . '
 				ORDER BY icons_order';
-			$result = $db->sql_query($sql);
+			$result = $this->db->sql_query($sql);
 
 			$icons = array();
-			while ($row = $db->sql_fetchrow($result))
+			while ($row = $this->db->sql_fetchrow($result))
 			{
 				$icons[$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']]['display'] = (bool) $row['display_on_posting'];
 			}
-			$db->sql_freeresult($result);
+			$this->db->sql_freeresult($result);
 
 			$this->driver->put('_icons', $icons);
 		}
@@ -124,15 +161,13 @@ class phpbb_cache_service
 	{
 		if (($ranks = $this->driver->get('_ranks')) === false)
 		{
-			global $db;
-
 			$sql = 'SELECT *
 				FROM ' . RANKS_TABLE . '
 				ORDER BY rank_min DESC';
-			$result = $db->sql_query($sql);
+			$result = $this->db->sql_query($sql);
 
 			$ranks = array();
-			while ($row = $db->sql_fetchrow($result))
+			while ($row = $this->db->sql_fetchrow($result))
 			{
 				if ($row['rank_special'])
 				{
@@ -150,7 +185,7 @@ class phpbb_cache_service
 					);
 				}
 			}
-			$db->sql_freeresult($result);
+			$this->db->sql_freeresult($result);
 
 			$this->driver->put('_ranks', $ranks);
 		}
@@ -169,8 +204,6 @@ class phpbb_cache_service
 	{
 		if (($extensions = $this->driver->get('_extensions')) === false)
 		{
-			global $db;
-
 			$extensions = array(
 				'_allowed_post'	=> array(),
 				'_allowed_pm'	=> array(),
@@ -181,9 +214,9 @@ class phpbb_cache_service
 				FROM ' . EXTENSIONS_TABLE . ' e, ' . EXTENSION_GROUPS_TABLE . ' g
 				WHERE e.group_id = g.group_id
 					AND (g.allow_group = 1 OR g.allow_in_pm = 1)';
-			$result = $db->sql_query($sql);
+			$result = $this->db->sql_query($sql);
 
-			while ($row = $db->sql_fetchrow($result))
+			while ($row = $this->db->sql_fetchrow($result))
 			{
 				$extension = strtolower(trim($row['extension']));
 
@@ -210,7 +243,7 @@ class phpbb_cache_service
 					$extensions['_allowed_pm'][$extension] = 0;
 				}
 			}
-			$db->sql_freeresult($result);
+			$this->db->sql_freeresult($result);
 
 			$this->driver->put('_extensions', $extensions);
 		}
@@ -275,9 +308,7 @@ class phpbb_cache_service
 	{
 		if (($bots = $this->driver->get('_bots')) === false)
 		{
-			global $db;
-
-			switch ($db->sql_layer)
+			switch ($this->db->sql_layer)
 			{
 				case 'mssql':
 				case 'mssql_odbc':
@@ -303,14 +334,14 @@ class phpbb_cache_service
 					ORDER BY LENGTH(bot_agent) DESC';
 				break;
 			}
-			$result = $db->sql_query($sql);
+			$result = $this->db->sql_query($sql);
 
 			$bots = array();
-			while ($row = $db->sql_fetchrow($result))
+			while ($row = $this->db->sql_fetchrow($result))
 			{
 				$bots[] = $row;
 			}
-			$db->sql_freeresult($result);
+			$this->db->sql_freeresult($result);
 
 			$this->driver->put('_bots', $bots);
 		}
@@ -323,8 +354,6 @@ class phpbb_cache_service
 	*/
 	function obtain_cfg_items($style)
 	{
-		global $config, $phpbb_root_path;
-
 		$parsed_array = $this->driver->get('_cfg_' . $style['style_path']);
 
 		if ($parsed_array === false)
@@ -332,14 +361,14 @@ class phpbb_cache_service
 			$parsed_array = array();
 		}
 
-		$filename = $phpbb_root_path . 'styles/' . $style['style_path'] . '/style.cfg';
+		$filename = $this->phpbb_root_path . 'styles/' . $style['style_path'] . '/style.cfg';
 
 		if (!file_exists($filename))
 		{
 			return $parsed_array;
 		}
 
-		if (!isset($parsed_array['filetime']) || (($config['load_tplcompile'] && @filemtime($filename) > $parsed_array['filetime'])))
+		if (!isset($parsed_array['filetime']) || (($this->config['load_tplcompile'] && @filemtime($filename) > $parsed_array['filetime'])))
 		{
 			// Re-parse cfg file
 			$parsed_array = parse_cfg_file($filename);
@@ -358,54 +387,20 @@ class phpbb_cache_service
 	{
 		if (($usernames = $this->driver->get('_disallowed_usernames')) === false)
 		{
-			global $db;
-
 			$sql = 'SELECT disallow_username
 				FROM ' . DISALLOW_TABLE;
-			$result = $db->sql_query($sql);
+			$result = $this->db->sql_query($sql);
 
 			$usernames = array();
-			while ($row = $db->sql_fetchrow($result))
+			while ($row = $this->db->sql_fetchrow($result))
 			{
 				$usernames[] = str_replace('%', '.*?', preg_quote(utf8_clean_string($row['disallow_username']), '#'));
 			}
-			$db->sql_freeresult($result);
+			$this->db->sql_freeresult($result);
 
 			$this->driver->put('_disallowed_usernames', $usernames);
 		}
 
 		return $usernames;
 	}
-
-	/**
-	* Obtain hooks...
-	*/
-	function obtain_hooks()
-	{
-		global $phpbb_root_path, $phpEx;
-
-		if (($hook_files = $this->driver->get('_hooks')) === false)
-		{
-			$hook_files = array();
-
-			// Now search for hooks...
-			$dh = @opendir($phpbb_root_path . 'includes/hooks/');
-
-			if ($dh)
-			{
-				while (($file = readdir($dh)) !== false)
-				{
-					if (strpos($file, 'hook_') === 0 && substr($file, -(strlen($phpEx) + 1)) === '.' . $phpEx)
-					{
-						$hook_files[] = substr($file, 0, -(strlen($phpEx) + 1));
-					}
-				}
-				closedir($dh);
-			}
-
-			$this->driver->put('_hooks', $hook_files);
-		}
-
-		return $hook_files;
-	}
 }
diff --git a/phpBB/includes/captcha/captcha_non_gd.php b/phpBB/includes/captcha/captcha_non_gd.php
index c2b97423e6..bb5067cafa 100644
--- a/phpBB/includes/captcha/captcha_non_gd.php
+++ b/phpBB/includes/captcha/captcha_non_gd.php
@@ -118,7 +118,7 @@ class captcha
 		$new_line = '';
 
 		$end = strlen($scanline) - ceil($width/2);
-		for ($i = floor($width/2); $i < $end; $i++)
+		for ($i = (int) floor($width / 2); $i < $end; $i++)
 		{
 			$pixel = ord($scanline{$i});
 
diff --git a/phpBB/includes/config/db.php b/phpBB/includes/config/db.php
index 45f9f1cb21..b18369a479 100644
--- a/phpBB/includes/config/db.php
+++ b/phpBB/includes/config/db.php
@@ -29,7 +29,7 @@ class phpbb_config_db extends phpbb_config
 
 	/**
 	* Database connection
-	* @var dbal
+	* @var phpbb_db_driver
 	*/
 	protected $db;
 
@@ -42,11 +42,11 @@ class phpbb_config_db extends phpbb_config
 	/**
 	* Creates a configuration container with a default set of values
 	*
-	* @param dbal                         $db    Database connection
+	* @param phpbb_db_driver              $db    Database connection
 	* @param phpbb_cache_driver_interface $cache Cache instance
 	* @param string                       $table Configuration table name
 	*/
-	public function __construct(dbal $db, phpbb_cache_driver_interface $cache, $table)
+	public function __construct(phpbb_db_driver $db, phpbb_cache_driver_interface $cache, $table)
 	{
 		$this->db = $db;
 		$this->cache = $cache;
diff --git a/phpBB/includes/constants.php b/phpBB/includes/constants.php
index 640616a49d..44562a6ee3 100644
--- a/phpBB/includes/constants.php
+++ b/phpBB/includes/constants.php
@@ -237,6 +237,7 @@ define('ICONS_TABLE',				$table_prefix . 'icons');
 define('LANG_TABLE',				$table_prefix . 'lang');
 define('LOG_TABLE',					$table_prefix . 'log');
 define('LOGIN_ATTEMPT_TABLE',		$table_prefix . 'login_attempts');
+define('MIGRATIONS_TABLE',			$table_prefix . 'migrations');
 define('MODERATOR_CACHE_TABLE',		$table_prefix . 'moderator_cache');
 define('MODULES_TABLE',				$table_prefix . 'modules');
 define('POLL_OPTIONS_TABLE',		$table_prefix . 'poll_options');
diff --git a/phpBB/includes/cron/task/core/prune_all_forums.php b/phpBB/includes/cron/task/core/prune_all_forums.php
index ee0b5f7626..2c5d38cec0 100644
--- a/phpBB/includes/cron/task/core/prune_all_forums.php
+++ b/phpBB/includes/cron/task/core/prune_all_forums.php
@@ -37,9 +37,9 @@ class phpbb_cron_task_core_prune_all_forums extends phpbb_cron_task_base
 	* @param string $phpbb_root_path The root path
 	* @param string $php_ext The PHP extension
 	* @param phpbb_config $config The config
-	* @param dbal $db The db connection
+	* @param phpbb_db_driver $db The db connection
 	*/
-	public function __construct($phpbb_root_path, $php_ext, phpbb_config $config, dbal $db)
+	public function __construct($phpbb_root_path, $php_ext, phpbb_config $config, phpbb_db_driver $db)
 	{
 		$this->phpbb_root_path = $phpbb_root_path;
 		$this->php_ext = $php_ext;
diff --git a/phpBB/includes/cron/task/core/prune_forum.php b/phpBB/includes/cron/task/core/prune_forum.php
index fa7a761d88..e3c497f072 100644
--- a/phpBB/includes/cron/task/core/prune_forum.php
+++ b/phpBB/includes/cron/task/core/prune_forum.php
@@ -47,9 +47,9 @@ class phpbb_cron_task_core_prune_forum extends phpbb_cron_task_base implements p
 	* @param string $phpbb_root_path The root path
 	* @param string $php_ext The PHP extension
 	* @param phpbb_config $config The config
-	* @param dbal $db The db connection
+	* @param phpbb_db_driver $db The db connection
 	*/
-	public function __construct($phpbb_root_path, $php_ext, phpbb_config $config, dbal $db)
+	public function __construct($phpbb_root_path, $php_ext, phpbb_config $config, phpbb_db_driver $db)
 	{
 		$this->phpbb_root_path = $phpbb_root_path;
 		$this->php_ext = $php_ext;
diff --git a/phpBB/includes/cron/task/core/tidy_search.php b/phpBB/includes/cron/task/core/tidy_search.php
index fdbe31346e..3ec25aa021 100644
--- a/phpBB/includes/cron/task/core/tidy_search.php
+++ b/phpBB/includes/cron/task/core/tidy_search.php
@@ -38,10 +38,10 @@ class phpbb_cron_task_core_tidy_search extends phpbb_cron_task_base
 	* @param string $php_ext The PHP extension
 	* @param phpbb_auth $auth The auth
 	* @param phpbb_config $config The config
-	* @param dbal $db The db connection
+	* @param phpbb_db_driver $db The db connection
 	* @param phpbb_user $user The user
 	*/
-	public function __construct($phpbb_root_path, $php_ext, phpbb_auth $auth, phpbb_config $config, dbal $db, phpbb_user $user)
+	public function __construct($phpbb_root_path, $php_ext, phpbb_auth $auth, phpbb_config $config, phpbb_db_driver $db, phpbb_user $user)
 	{
 		$this->phpbb_root_path = $phpbb_root_path;
 		$this->php_ext = $php_ext;
diff --git a/phpBB/includes/datetime.php b/phpBB/includes/datetime.php
index b3462ddf67..3c6d4971b9 100644
--- a/phpBB/includes/datetime.php
+++ b/phpBB/includes/datetime.php
@@ -143,7 +143,7 @@ class phpbb_datetime extends DateTime
 				'is_short'		=> strpos($format, self::RELATIVE_WRAPPER) !== false,
 				'format_short'	=> substr($format, 0, strpos($format, self::RELATIVE_WRAPPER)) . self::RELATIVE_WRAPPER . self::RELATIVE_WRAPPER . substr(strrchr($format, self::RELATIVE_WRAPPER), 1),
 				'format_long'	=> str_replace(self::RELATIVE_WRAPPER, '', $format),
-				'lang'			=> $user->lang['datetime'],
+				'lang'			=> array_filter($user->lang['datetime'], 'is_string'),
 			);
 
 			// Short representation of month in format? Some languages use different terms for the long and short format of May
diff --git a/phpBB/includes/db/db_tools.php b/phpBB/includes/db/db_tools.php
index 6df3aac9ce..983cdc18ea 100644
--- a/phpBB/includes/db/db_tools.php
+++ b/phpBB/includes/db/db_tools.php
@@ -300,10 +300,10 @@ class phpbb_db_tools
 	/**
 	* Constructor. Set DB Object and set {@link $return_statements return_statements}.
 	*
-	* @param phpbb_dbal	$db					DBAL object
+	* @param phpbb_db_driver	$db					Database connection
 	* @param bool		$return_statements	True if only statements should be returned and no SQL being executed
 	*/
-	function phpbb_db_tools(&$db, $return_statements = false)
+	function phpbb_db_tools(phpbb_db_driver $db, $return_statements = false)
 	{
 		$this->db = $db;
 		$this->return_statements = $return_statements;
@@ -346,6 +346,17 @@ class phpbb_db_tools
 	}
 
 	/**
+	* 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)
@@ -674,6 +685,8 @@ class phpbb_db_tools
 	* 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
@@ -1817,6 +1830,22 @@ class phpbb_db_tools
 
 			case 'mssql':
 			case 'mssqlnative':
+				// remove default cosntraints first
+				// http://msdn.microsoft.com/en-us/library/aa175912%28v=sql.80%29.aspx
+				$statements[] = "DECLARE @drop_default_name VARCHAR(100), @cmd VARCHAR(1000)
+					SET @drop_default_name =
+						(SELECT so.name FROM sysobjects so
+						JOIN sysconstraints sc ON so.id = sc.constid
+						WHERE object_name(so.parent_obj) = '{$table_name}'
+							AND so.xtype = 'D'
+							AND sc.colid = (SELECT colid FROM syscolumns
+								WHERE id = object_id('{$table_name}')
+									AND name = '{$column_name}'))
+					IF @drop_default_name <> ''
+					BEGIN
+						SET @cmd = 'ALTER TABLE [{$table_name}] DROP CONSTRAINT [' + @drop_default_name + ']'
+						EXEC(@cmd)
+					END";
 				$statements[] = 'ALTER TABLE [' . $table_name . '] DROP COLUMN [' . $column_name . ']';
 			break;
 
diff --git a/phpBB/includes/db/dbal.php b/phpBB/includes/db/driver/driver.php
index ef1dd7d14d..8dda94bc2c 100644
--- a/phpBB/includes/db/dbal.php
+++ b/phpBB/includes/db/driver/driver.php
@@ -19,7 +19,7 @@ if (!defined('IN_PHPBB'))
 * Database Abstraction Layer
 * @package dbal
 */
-class dbal
+class phpbb_db_driver
 {
 	var $db_connect_id;
 	var $query_result;
@@ -72,17 +72,17 @@ class dbal
 	/**
 	* Constructor
 	*/
-	function dbal()
+	function __construct()
 	{
 		$this->num_queries = array(
-			'cached'		=> 0,
-			'normal'		=> 0,
-			'total'			=> 0,
+			'cached'	=> 0,
+			'normal'	=> 0,
+			'total'		=> 0,
 		);
 
 		// Fill default sql layer based on the class being called.
 		// This can be changed by the specified layer itself later if needed.
-		$this->sql_layer = substr(get_class($this), 5);
+		$this->sql_layer = substr(get_class($this), strlen('phpbb_db_driver_'));
 
 		// Do not change this please! This variable is used to easy the use of it - and is hardcoded.
 		$this->any_char = chr(0) . '%';
@@ -206,7 +206,7 @@ class dbal
 			$query_id = $this->query_result;
 		}
 
-		if ($cache->sql_exists($query_id))
+		if ($cache && $cache->sql_exists($query_id))
 		{
 			return $cache->sql_rowseek($rownum, $query_id);
 		}
@@ -256,7 +256,7 @@ class dbal
 				$this->sql_rowseek($rownum, $query_id);
 			}
 
-			if (!is_object($query_id) && $cache->sql_exists($query_id))
+			if ($cache && !is_object($query_id) && $cache->sql_exists($query_id))
 			{
 				return $cache->sql_fetchfield($query_id, $field);
 			}
@@ -822,7 +822,7 @@ class dbal
 	*/
 	function sql_report($mode, $query = '')
 	{
-		global $cache, $starttime, $phpbb_root_path, $user;
+		global $cache, $starttime, $phpbb_root_path, $phpbb_admin_path, $user;
 		global $request;
 
 		if (is_object($request) && !$request->variable('explain', false))
@@ -852,7 +852,7 @@ class dbal
 					<head>
 						<meta charset="utf-8">
 						<title>SQL Report</title>
-						<link href="' . $phpbb_root_path . 'adm/style/admin.css" rel="stylesheet" type="text/css" media="screen" />
+						<link href="' . htmlspecialchars($phpbb_admin_path) . 'style/admin.css" rel="stylesheet" type="text/css" media="screen" />
 					</head>
 					<body id="errorpage">
 					<div id="wrap">
@@ -1042,8 +1042,3 @@ class dbal
 		return $rows_total;
 	}
 }
-
-/**
-* This variable holds the class name to use later
-*/
-$sql_db = (!empty($dbms)) ? 'dbal_' . basename($dbms) : 'dbal';
diff --git a/phpBB/includes/db/firebird.php b/phpBB/includes/db/driver/firebird.php
index 5728eb901c..787c28b812 100644
--- a/phpBB/includes/db/firebird.php
+++ b/phpBB/includes/db/driver/firebird.php
@@ -15,14 +15,12 @@ if (!defined('IN_PHPBB'))
 	exit;
 }
 
-include_once($phpbb_root_path . 'includes/db/dbal.' . $phpEx);
-
 /**
 * Firebird/Interbase Database Abstraction Layer
 * Minimum Requirement is Firebird 2.1
 * @package dbal
 */
-class dbal_firebird extends dbal
+class phpbb_db_driver_firebird extends phpbb_db_driver
 {
 	var $last_query_text = '';
 	var $service_handle = false;
@@ -156,7 +154,7 @@ class dbal_firebird extends dbal
 			}
 
 			$this->last_query_text = $query;
-			$this->query_result = ($cache_ttl) ? $cache->sql_load($query) : false;
+			$this->query_result = ($cache && $cache_ttl) ? $cache->sql_load($query) : false;
 			$this->sql_add_num_queries($this->query_result);
 
 			if ($this->query_result === false)
@@ -269,10 +267,10 @@ class dbal_firebird extends dbal
 					}
 				}
 
-				if ($cache_ttl)
+				if ($cache && $cache_ttl)
 				{
 					$this->open_queries[(int) $this->query_result] = $this->query_result;
-					$this->query_result = $cache->sql_save($query, $this->query_result, $cache_ttl);
+					$this->query_result = $cache->sql_save($this, $query, $this->query_result, $cache_ttl);
 				}
 				else if (strpos($query, 'SELECT') === 0 && $this->query_result)
 				{
@@ -332,7 +330,7 @@ class dbal_firebird extends dbal
 			$query_id = $this->query_result;
 		}
 
-		if ($cache->sql_exists($query_id))
+		if ($cache && $cache->sql_exists($query_id))
 		{
 			return $cache->sql_fetchrow($query_id);
 		}
@@ -398,7 +396,7 @@ class dbal_firebird extends dbal
 			$query_id = $this->query_result;
 		}
 
-		if ($cache->sql_exists($query_id))
+		if ($cache && $cache->sql_exists($query_id))
 		{
 			return $cache->sql_freeresult($query_id);
 		}
diff --git a/phpBB/includes/db/mssql.php b/phpBB/includes/db/driver/mssql.php
index 1ec8517308..89c2c2351b 100644
--- a/phpBB/includes/db/mssql.php
+++ b/phpBB/includes/db/driver/mssql.php
@@ -15,20 +15,26 @@ if (!defined('IN_PHPBB'))
 	exit;
 }
 
-include_once($phpbb_root_path . 'includes/db/dbal.' . $phpEx);
-
 /**
 * MSSQL Database Abstraction Layer
 * Minimum Requirement is MSSQL 2000+
 * @package dbal
 */
-class dbal_mssql extends dbal
+class phpbb_db_driver_mssql extends phpbb_db_driver
 {
+	var $connect_error = '';
+
 	/**
 	* Connect to server
 	*/
 	function sql_connect($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;
@@ -144,7 +150,7 @@ class dbal_mssql extends dbal
 				$this->sql_report('start', $query);
 			}
 
-			$this->query_result = ($cache_ttl) ? $cache->sql_load($query) : false;
+			$this->query_result = ($cache && $cache_ttl) ? $cache->sql_load($query) : false;
 			$this->sql_add_num_queries($this->query_result);
 
 			if ($this->query_result === false)
@@ -159,10 +165,10 @@ class dbal_mssql extends dbal
 					$this->sql_report('stop', $query);
 				}
 
-				if ($cache_ttl)
+				if ($cache && $cache_ttl)
 				{
 					$this->open_queries[(int) $this->query_result] = $this->query_result;
-					$this->query_result = $cache->sql_save($query, $this->query_result, $cache_ttl);
+					$this->query_result = $cache->sql_save($this, $query, $this->query_result, $cache_ttl);
 				}
 				else if (strpos($query, 'SELECT') === 0 && $this->query_result)
 				{
@@ -234,7 +240,7 @@ class dbal_mssql extends dbal
 			$query_id = $this->query_result;
 		}
 
-		if ($cache->sql_exists($query_id))
+		if ($cache && $cache->sql_exists($query_id))
 		{
 			return $cache->sql_fetchrow($query_id);
 		}
@@ -271,7 +277,7 @@ class dbal_mssql extends dbal
 			$query_id = $this->query_result;
 		}
 
-		if ($cache->sql_exists($query_id))
+		if ($cache && $cache->sql_exists($query_id))
 		{
 			return $cache->sql_rowseek($rownum, $query_id);
 		}
@@ -310,7 +316,7 @@ class dbal_mssql extends dbal
 			$query_id = $this->query_result;
 		}
 
-		if ($cache->sql_exists($query_id))
+		if ($cache && $cache->sql_exists($query_id))
 		{
 			return $cache->sql_freeresult($query_id);
 		}
@@ -355,34 +361,44 @@ class dbal_mssql extends dbal
 	*/
 	function _sql_error()
 	{
-		$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)
+		if (function_exists('mssql_get_last_message'))
 		{
-			$row = @mssql_fetch_assoc($result_id);
-			$error['code'] = $row['code'];
-			@mssql_free_result($result_id);
-		}
+			$error = array(
+				'message'	=> @mssql_get_last_message(),
+				'code'		=> '',
+			);
 
-		// 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']))
+			// Get error code number
+			$result_id = @mssql_query('SELECT @@ERROR as code', $this->db_connect_id);
+			if ($result_id)
 			{
-				$error['message'] .= '<br />' . $row['message'];
+				$row = @mssql_fetch_assoc($result_id);
+				$error['code'] = $row['code'];
+				@mssql_free_result($result_id);
 			}
-			@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;
diff --git a/phpBB/includes/db/mssql_odbc.php b/phpBB/includes/db/driver/mssql_odbc.php
index 7c1ffbc808..f7834443eb 100644
--- a/phpBB/includes/db/mssql_odbc.php
+++ b/phpBB/includes/db/driver/mssql_odbc.php
@@ -15,8 +15,6 @@ if (!defined('IN_PHPBB'))
 	exit;
 }
 
-include_once($phpbb_root_path . 'includes/db/dbal.' . $phpEx);
-
 /**
 * Unified ODBC functions
 * Unified ODBC functions support any database having ODBC driver, for example Adabas D, IBM DB2, iODBC, Solid, Sybase SQL Anywhere...
@@ -28,9 +26,10 @@ include_once($phpbb_root_path . 'includes/db/dbal.' . $phpEx);
 *
 * @package dbal
 */
-class dbal_mssql_odbc extends dbal
+class phpbb_db_driver_mssql_odbc extends phpbb_db_driver
 {
 	var $last_query_text = '';
+	var $connect_error = '';
 
 	/**
 	* Connect to server
@@ -67,7 +66,24 @@ class dbal_mssql_odbc extends dbal
 			@ini_set('odbc.defaultlrl', $max_size);
 		}
 
-		$this->db_connect_id = ($this->persistency) ? @odbc_pconnect($this->server, $this->user, $sqlpassword) : @odbc_connect($this->server, $this->user, $sqlpassword);
+		if ($this->persistency)
+		{
+			if (!function_exists('odbc_pconnect'))
+			{
+				$this->connect_error = 'odbc_pconnect function does not exist, is odbc extension installed?';
+				return $this->sql_error('');
+			}
+			$this->db_connect_id = @odbc_pconnect($this->server, $this->user, $sqlpassword);
+		}
+		else
+		{
+			if (!function_exists('odbc_connect'))
+			{
+				$this->connect_error = 'odbc_connect function does not exist, is odbc extension installed?';
+				return $this->sql_error('');
+			}
+			$this->db_connect_id = @odbc_connect($this->server, $this->user, $sqlpassword);
+		}
 
 		return ($this->db_connect_id) ? $this->db_connect_id : $this->sql_error('');
 	}
@@ -163,7 +179,7 @@ class dbal_mssql_odbc extends dbal
 			}
 
 			$this->last_query_text = $query;
-			$this->query_result = ($cache_ttl) ? $cache->sql_load($query) : false;
+			$this->query_result = ($cache && $cache_ttl) ? $cache->sql_load($query) : false;
 			$this->sql_add_num_queries($this->query_result);
 
 			if ($this->query_result === false)
@@ -178,10 +194,10 @@ class dbal_mssql_odbc extends dbal
 					$this->sql_report('stop', $query);
 				}
 
-				if ($cache_ttl)
+				if ($cache && $cache_ttl)
 				{
 					$this->open_queries[(int) $this->query_result] = $this->query_result;
-					$this->query_result = $cache->sql_save($query, $this->query_result, $cache_ttl);
+					$this->query_result = $cache->sql_save($this, $query, $this->query_result, $cache_ttl);
 				}
 				else if (strpos($query, 'SELECT') === 0 && $this->query_result)
 				{
@@ -254,7 +270,7 @@ class dbal_mssql_odbc extends dbal
 			$query_id = $this->query_result;
 		}
 
-		if ($cache->sql_exists($query_id))
+		if ($cache && $cache->sql_exists($query_id))
 		{
 			return $cache->sql_fetchrow($query_id);
 		}
@@ -295,7 +311,7 @@ class dbal_mssql_odbc extends dbal
 			$query_id = $this->query_result;
 		}
 
-		if ($cache->sql_exists($query_id))
+		if ($cache && $cache->sql_exists($query_id))
 		{
 			return $cache->sql_freeresult($query_id);
 		}
@@ -349,10 +365,22 @@ class dbal_mssql_odbc extends dbal
 	*/
 	function _sql_error()
 	{
-		return array(
-			'message'	=> @odbc_errormsg(),
-			'code'		=> @odbc_error()
-		);
+		if (function_exists('odbc_errormsg'))
+		{
+			$error = array(
+				'message'	=> @odbc_errormsg(),
+				'code'		=> @odbc_error(),
+			);
+		}
+		else
+		{
+			$error = array(
+				'message'	=> $this->connect_error,
+				'code'		=> '',
+			);
+		}
+
+		return $error;
 	}
 
 	/**
diff --git a/phpBB/includes/db/mssqlnative.php b/phpBB/includes/db/driver/mssqlnative.php
index e9191fae8a..656cbd2437 100644
--- a/phpBB/includes/db/mssqlnative.php
+++ b/phpBB/includes/db/driver/mssqlnative.php
@@ -19,8 +19,6 @@ if (!defined('IN_PHPBB'))
 	exit;
 }
 
-include_once($phpbb_root_path . 'includes/db/dbal.' . $phpEx);
-
 /**
  * Prior to version 1.1 the SQL Server Native PHP driver didn't support sqlsrv_num_rows, or cursor based seeking so we recall all rows into an array
  * and maintain our own cursor index into that array.
@@ -193,21 +191,23 @@ class result_mssqlnative
 /**
 * @package dbal
 */
-class dbal_mssqlnative extends dbal
+class phpbb_db_driver_mssqlnative extends phpbb_db_driver
 {
 	var $m_insert_id = NULL;
 	var $last_query_text = '';
 	var $query_options = array();
+	var $connect_error = '';
 
 	/**
 	* Connect to server
 	*/
 	function sql_connect($sqlserver, $sqluser, $sqlpassword, $database, $port = false, $persistency = false, $new_link = false)
 	{
-		# Test for driver support, to avoid suppressed fatal error
+		// Test for driver support, to avoid suppressed fatal error
 		if (!function_exists('sqlsrv_connect'))
 		{
-			trigger_error('Native MS SQL Server driver for PHP is missing or needs to be updated. Version 1.1 or later is required to install phpBB3. You can download the driver from: http://www.microsoft.com/sqlserver/2005/en/us/PHP-Driver.aspx\n', E_USER_ERROR);
+			$this->connect_error = 'Native MS SQL Server driver for PHP is missing or needs to be updated. Version 1.1 or later is required to install phpBB3. You can download the driver from: http://www.microsoft.com/sqlserver/2005/en/us/PHP-Driver.aspx';
+			return $this->sql_error('');
 		}
 
 		//set up connection variables
@@ -317,7 +317,7 @@ class dbal_mssqlnative extends dbal
 			}
 
 			$this->last_query_text = $query;
-			$this->query_result = ($cache_ttl) ? $cache->sql_load($query) : false;
+			$this->query_result = ($cache && $cache_ttl) ? $cache->sql_load($query) : false;
 			$this->sql_add_num_queries($this->query_result);
 
 			if ($this->query_result === false)
@@ -337,7 +337,7 @@ class dbal_mssqlnative extends dbal
 				if ($cache_ttl)
 				{
 					$this->open_queries[(int) $this->query_result] = $this->query_result;
-					$this->query_result = $cache->sql_save($query, $this->query_result, $cache_ttl);
+					$this->query_result = $cache->sql_save($this, $query, $this->query_result, $cache_ttl);
 				}
 				else if (strpos($query, 'SELECT') === 0 && $this->query_result)
 				{
@@ -521,31 +521,43 @@ class dbal_mssqlnative extends dbal
 	*/
 	function _sql_error()
 	{
-		$errors = @sqlsrv_errors(SQLSRV_ERR_ERRORS);
-		$error_message = '';
-		$code = 0;
-
-		if ($errors != null)
+		if (function_exists('sqlsrv_errors'))
 		{
-			foreach ($errors as $error)
+			$errors = @sqlsrv_errors(SQLSRV_ERR_ERRORS);
+			$error_message = '';
+			$code = 0;
+
+			if ($errors != null)
 			{
-				$error_message .= "SQLSTATE: ".$error[ 'SQLSTATE']."\n";
-				$error_message .= "code: ".$error[ 'code']."\n";
-				$code = $error['code'];
-				$error_message .= "message: ".$error[ 'message']."\n";
+				foreach ($errors as $error)
+				{
+					$error_message .= "SQLSTATE: " . $error[ 'SQLSTATE'] . "\n";
+					$error_message .= "code: " . $error[ 'code'] . "\n";
+					$code = $error['code'];
+					$error_message .= "message: " . $error[ 'message'] . "\n";
+				}
+				$this->last_error_result = $error_message;
+				$error = $this->last_error_result;
 			}
-			$this->last_error_result = $error_message;
-			$error = $this->last_error_result;
+			else
+			{
+				$error = (isset($this->last_error_result) && $this->last_error_result) ? $this->last_error_result : array();
+			}
+
+			$error = array(
+				'message'	=> $error,
+				'code'		=> $code,
+			);
 		}
 		else
 		{
-			$error = (isset($this->last_error_result) && $this->last_error_result) ? $this->last_error_result : array();
+			$error = array(
+				'message'	=> $this->connect_error,
+				'code'		=> '',
+			);
 		}
 
-		return array(
-			'message'	=> $error,
-			'code'		=> $code,
-		);
+		return $error;
 	}
 
 	/**
diff --git a/phpBB/includes/db/mysql.php b/phpBB/includes/db/driver/mysql.php
index f685ab055c..9de7283a42 100644
--- a/phpBB/includes/db/mysql.php
+++ b/phpBB/includes/db/driver/mysql.php
@@ -15,8 +15,6 @@ if (!defined('IN_PHPBB'))
 	exit;
 }
 
-include_once($phpbb_root_path . 'includes/db/dbal.' . $phpEx);
-
 /**
 * MySQL4 Database Abstraction Layer
 * Compatible with:
@@ -26,9 +24,10 @@ include_once($phpbb_root_path . 'includes/db/dbal.' . $phpEx);
 * MySQL 5.0+
 * @package dbal
 */
-class dbal_mysql extends dbal
+class phpbb_db_driver_mysql extends phpbb_db_driver
 {
 	var $multi_insert = true;
+	var $connect_error = '';
 
 	/**
 	* Connect to server
@@ -43,7 +42,24 @@ class dbal_mysql extends dbal
 
 		$this->sql_layer = 'mysql4';
 
-		$this->db_connect_id = ($this->persistency) ? @mysql_pconnect($this->server, $this->user, $sqlpassword) : @mysql_connect($this->server, $this->user, $sqlpassword, $new_link);
+		if ($this->persistency)
+		{
+			if (!function_exists('mysql_pconnect'))
+			{
+				$this->connect_error = 'mysql_pconnect function does not exist, is mysql extension installed?';
+				return $this->sql_error('');
+			}
+			$this->db_connect_id = @mysql_pconnect($this->server, $this->user, $sqlpassword);
+		}
+		else
+		{
+			if (!function_exists('mysql_connect'))
+			{
+				$this->connect_error = 'mysql_connect function does not exist, is mysql extension installed?';
+				return $this->sql_error('');
+			}
+			$this->db_connect_id = @mysql_connect($this->server, $this->user, $sqlpassword, $new_link);
+		}
 
 		if ($this->db_connect_id && $this->dbname != '')
 		{
@@ -172,7 +188,7 @@ class dbal_mysql extends dbal
 				$this->sql_report('start', $query);
 			}
 
-			$this->query_result = ($cache_ttl) ? $cache->sql_load($query) : false;
+			$this->query_result = ($cache && $cache_ttl) ? $cache->sql_load($query) : false;
 			$this->sql_add_num_queries($this->query_result);
 
 			if ($this->query_result === false)
@@ -187,10 +203,10 @@ class dbal_mysql extends dbal
 					$this->sql_report('stop', $query);
 				}
 
-				if ($cache_ttl)
+				if ($cache && $cache_ttl)
 				{
 					$this->open_queries[(int) $this->query_result] = $this->query_result;
-					$this->query_result = $cache->sql_save($query, $this->query_result, $cache_ttl);
+					$this->query_result = $cache->sql_save($this, $query, $this->query_result, $cache_ttl);
 				}
 				else if (strpos($query, 'SELECT') === 0 && $this->query_result)
 				{
@@ -249,7 +265,7 @@ class dbal_mysql extends dbal
 			$query_id = $this->query_result;
 		}
 
-		if ($cache->sql_exists($query_id))
+		if ($cache && $cache->sql_exists($query_id))
 		{
 			return $cache->sql_fetchrow($query_id);
 		}
@@ -270,7 +286,7 @@ class dbal_mysql extends dbal
 			$query_id = $this->query_result;
 		}
 
-		if ($cache->sql_exists($query_id))
+		if ($cache && $cache->sql_exists($query_id))
 		{
 			return $cache->sql_rowseek($rownum, $query_id);
 		}
@@ -298,7 +314,7 @@ class dbal_mysql extends dbal
 			$query_id = $this->query_result;
 		}
 
-		if ($cache->sql_exists($query_id))
+		if ($cache && $cache->sql_exists($query_id))
 		{
 			return $cache->sql_freeresult($query_id);
 		}
@@ -426,18 +442,29 @@ class dbal_mysql extends dbal
 	*/
 	function _sql_error()
 	{
-		if (!$this->db_connect_id)
+		if ($this->db_connect_id)
+		{
+			$error = array(
+				'message'	=> @mysql_error($this->db_connect_id),
+				'code'		=> @mysql_errno($this->db_connect_id),
+			);
+		}
+		else if (function_exists('mysql_error'))
 		{
-			return array(
+			$error = array(
 				'message'	=> @mysql_error(),
-				'code'		=> @mysql_errno()
+				'code'		=> @mysql_errno(),
+			);
+		}
+		else
+		{
+			$error = array(
+				'message'	=> $this->connect_error,
+				'code'		=> '',
 			);
 		}
 
-		return array(
-			'message'	=> @mysql_error($this->db_connect_id),
-			'code'		=> @mysql_errno($this->db_connect_id)
-		);
+		return $error;
 	}
 
 	/**
diff --git a/phpBB/includes/db/mysqli.php b/phpBB/includes/db/driver/mysqli.php
index 6d81b8bc3e..7448bf1670 100644
--- a/phpBB/includes/db/mysqli.php
+++ b/phpBB/includes/db/driver/mysqli.php
@@ -15,23 +15,28 @@ if (!defined('IN_PHPBB'))
 	exit;
 }
 
-include_once($phpbb_root_path . 'includes/db/dbal.' . $phpEx);
-
 /**
 * MySQLi Database Abstraction Layer
 * mysqli-extension has to be compiled with:
 * MySQL 4.1+ or MySQL 5.0+
 * @package dbal
 */
-class dbal_mysqli extends dbal
+class phpbb_db_driver_mysqli extends phpbb_db_driver
 {
 	var $multi_insert = true;
+	var $connect_error = '';
 
 	/**
 	* Connect to server
 	*/
 	function sql_connect($sqlserver, $sqluser, $sqlpassword, $database, $port = false, $persistency = false , $new_link = false)
 	{
+		if (!function_exists('mysqli_connect'))
+		{
+			$this->connect_error = 'mysqli_connect function does not exist, is mysqli extension installed?';
+			return $this->sql_error('');
+		}
+
 		// Mysqli extension supports persistent connection since PHP 5.3.0
 		$this->persistency = (version_compare(PHP_VERSION, '5.3.0', '>=')) ? $persistency : false;
 		$this->user = $sqluser;
@@ -179,7 +184,7 @@ class dbal_mysqli extends dbal
 				$this->sql_report('start', $query);
 			}
 
-			$this->query_result = ($cache_ttl) ? $cache->sql_load($query) : false;
+			$this->query_result = ($cache && $cache_ttl) ? $cache->sql_load($query) : false;
 			$this->sql_add_num_queries($this->query_result);
 
 			if ($this->query_result === false)
@@ -194,9 +199,9 @@ class dbal_mysqli extends dbal
 					$this->sql_report('stop', $query);
 				}
 
-				if ($cache_ttl)
+				if ($cache && $cache_ttl)
 				{
-					$this->query_result = $cache->sql_save($query, $this->query_result, $cache_ttl);
+					$this->query_result = $cache->sql_save($this, $query, $this->query_result, $cache_ttl);
 				}
 			}
 			else if (defined('DEBUG'))
@@ -251,7 +256,7 @@ class dbal_mysqli extends dbal
 			$query_id = $this->query_result;
 		}
 
-		if (!is_object($query_id) && $cache->sql_exists($query_id))
+		if ($cache && !is_object($query_id) && $cache->sql_exists($query_id))
 		{
 			return $cache->sql_fetchrow($query_id);
 		}
@@ -278,7 +283,7 @@ class dbal_mysqli extends dbal
 			$query_id = $this->query_result;
 		}
 
-		if (!is_object($query_id) && $cache->sql_exists($query_id))
+		if ($cache && !is_object($query_id) && $cache->sql_exists($query_id))
 		{
 			return $cache->sql_rowseek($rownum, $query_id);
 		}
@@ -306,7 +311,7 @@ class dbal_mysqli extends dbal
 			$query_id = $this->query_result;
 		}
 
-		if (!is_object($query_id) && $cache->sql_exists($query_id))
+		if ($cache && !is_object($query_id) && $cache->sql_exists($query_id))
 		{
 			return $cache->sql_freeresult($query_id);
 		}
@@ -423,18 +428,29 @@ class dbal_mysqli extends dbal
 	*/
 	function _sql_error()
 	{
-		if (!$this->db_connect_id)
+		if ($this->db_connect_id)
 		{
-			return array(
+			$error = array(
+				'message'	=> @mysqli_error($this->db_connect_id),
+				'code'		=> @mysqli_errno($this->db_connect_id)
+			);
+		}
+		else if (function_exists('mysqli_connect_error'))
+		{
+			$error = array(
 				'message'	=> @mysqli_connect_error(),
-				'code'		=> @mysqli_connect_errno()
+				'code'		=> @mysqli_connect_errno(),
+			);
+		}
+		else
+		{
+			$error = array(
+				'message'	=> $this->connect_error,
+				'code'		=> '',
 			);
 		}
 
-		return array(
-			'message'	=> @mysqli_error($this->db_connect_id),
-			'code'		=> @mysqli_errno($this->db_connect_id)
-		);
+		return $error;
 	}
 
 	/**
diff --git a/phpBB/includes/db/oracle.php b/phpBB/includes/db/driver/oracle.php
index 6d9339b2d8..e21e07055d 100644
--- a/phpBB/includes/db/oracle.php
+++ b/phpBB/includes/db/driver/oracle.php
@@ -15,15 +15,14 @@ if (!defined('IN_PHPBB'))
 	exit;
 }
 
-include_once($phpbb_root_path . 'includes/db/dbal.' . $phpEx);
-
 /**
 * Oracle Database Abstraction Layer
 * @package dbal
 */
-class dbal_oracle extends dbal
+class phpbb_db_driver_oracle extends phpbb_db_driver
 {
 	var $last_query_text = '';
+	var $connect_error = '';
 
 	/**
 	* Connect to server
@@ -47,7 +46,33 @@ class dbal_oracle extends dbal
 			$connect = $sqlserver . (($port) ? ':' . $port : '') . '/' . $database;
 		}
 
-		$this->db_connect_id = ($new_link) ? @ocinlogon($this->user, $sqlpassword, $connect, 'UTF8') : (($this->persistency) ? @ociplogon($this->user, $sqlpassword, $connect, 'UTF8') : @ocilogon($this->user, $sqlpassword, $connect, 'UTF8'));
+		if ($new_link)
+		{
+			if (!function_exists('ocinlogon'))
+			{
+				$this->connect_error = 'ocinlogon function does not exist, is oci extension installed?';
+				return $this->sql_error('');
+			}
+			$this->db_connect_id = @ocinlogon($this->user, $sqlpassword, $connect, 'UTF8');
+		}
+		else if ($this->persistency)
+		{
+			if (!function_exists('ociplogon'))
+			{
+				$this->connect_error = 'ociplogon function does not exist, is oci extension installed?';
+				return $this->sql_error('');
+			}
+			$this->db_connect_id = @ociplogon($this->user, $sqlpassword, $connect, 'UTF8');
+		}
+		else
+		{
+			if (!function_exists('ocilogon'))
+			{
+				$this->connect_error = 'ocilogon function does not exist, is oci extension installed?';
+				return $this->sql_error('');
+			}
+			$this->db_connect_id = @ocilogon($this->user, $sqlpassword, $connect, 'UTF8');
+		}
 
 		return ($this->db_connect_id) ? $this->db_connect_id : $this->sql_error('');
 	}
@@ -242,7 +267,7 @@ class dbal_oracle extends dbal
 			}
 
 			$this->last_query_text = $query;
-			$this->query_result = ($cache_ttl) ? $cache->sql_load($query) : false;
+			$this->query_result = ($cache && $cache_ttl) ? $cache->sql_load($query) : false;
 			$this->sql_add_num_queries($this->query_result);
 
 			if ($this->query_result === false)
@@ -418,10 +443,10 @@ class dbal_oracle extends dbal
 					$this->sql_report('stop', $query);
 				}
 
-				if ($cache_ttl)
+				if ($cache && $cache_ttl)
 				{
 					$this->open_queries[(int) $this->query_result] = $this->query_result;
-					$this->query_result = $cache->sql_save($query, $this->query_result, $cache_ttl);
+					$this->query_result = $cache->sql_save($this, $query, $this->query_result, $cache_ttl);
 				}
 				else if (strpos($query, 'SELECT') === 0 && $this->query_result)
 				{
@@ -473,7 +498,7 @@ class dbal_oracle extends dbal
 			$query_id = $this->query_result;
 		}
 
-		if ($cache->sql_exists($query_id))
+		if ($cache && $cache->sql_exists($query_id))
 		{
 			return $cache->sql_fetchrow($query_id);
 		}
@@ -525,7 +550,7 @@ class dbal_oracle extends dbal
 			$query_id = $this->query_result;
 		}
 
-		if ($cache->sql_exists($query_id))
+		if ($cache && $cache->sql_exists($query_id))
 		{
 			return $cache->sql_rowseek($rownum, $query_id);
 		}
@@ -594,7 +619,7 @@ class dbal_oracle extends dbal
 			$query_id = $this->query_result;
 		}
 
-		if ($cache->sql_exists($query_id))
+		if ($cache && $cache->sql_exists($query_id))
 		{
 			return $cache->sql_freeresult($query_id);
 		}
@@ -646,17 +671,27 @@ class dbal_oracle extends dbal
 	*/
 	function _sql_error()
 	{
-		$error = @ocierror();
-		$error = (!$error) ? @ocierror($this->query_result) : $error;
-		$error = (!$error) ? @ocierror($this->db_connect_id) : $error;
-
-		if ($error)
+		if (function_exists('ocierror'))
 		{
-			$this->last_error_result = $error;
+			$error = @ocierror();
+			$error = (!$error) ? @ocierror($this->query_result) : $error;
+			$error = (!$error) ? @ocierror($this->db_connect_id) : $error;
+
+			if ($error)
+			{
+				$this->last_error_result = $error;
+			}
+			else
+			{
+				$error = (isset($this->last_error_result) && $this->last_error_result) ? $this->last_error_result : array();
+			}
 		}
 		else
 		{
-			$error = (isset($this->last_error_result) && $this->last_error_result) ? $this->last_error_result : array();
+			$error = array(
+				'message'	=> $this->connect_error,
+				'code'		=> '',
+			);
 		}
 
 		return $error;
diff --git a/phpBB/includes/db/postgres.php b/phpBB/includes/db/driver/postgres.php
index 8dfbfc3b60..14854d179d 100644
--- a/phpBB/includes/db/postgres.php
+++ b/phpBB/includes/db/driver/postgres.php
@@ -15,19 +15,12 @@ if (!defined('IN_PHPBB'))
 	exit;
 }
 
-include_once($phpbb_root_path . 'includes/db/dbal.' . $phpEx);
-
-if (!class_exists('phpbb_error_collector'))
-{
-	include($phpbb_root_path . 'includes/error_collector.' . $phpEx);
-}
-
 /**
 * PostgreSQL Database Abstraction Layer
 * Minimum Requirement is Version 7.3+
 * @package dbal
 */
-class dbal_postgres extends dbal
+class phpbb_db_driver_postgres extends phpbb_db_driver
 {
 	var $last_query_text = '';
 	var $connect_error = '';
@@ -200,7 +193,7 @@ class dbal_postgres extends dbal
 			}
 
 			$this->last_query_text = $query;
-			$this->query_result = ($cache_ttl) ? $cache->sql_load($query) : false;
+			$this->query_result = ($cache && $cache_ttl) ? $cache->sql_load($query) : false;
 			$this->sql_add_num_queries($this->query_result);
 
 			if ($this->query_result === false)
@@ -215,10 +208,10 @@ class dbal_postgres extends dbal
 					$this->sql_report('stop', $query);
 				}
 
-				if ($cache_ttl)
+				if ($cache && $cache_ttl)
 				{
 					$this->open_queries[(int) $this->query_result] = $this->query_result;
-					$this->query_result = $cache->sql_save($query, $this->query_result, $cache_ttl);
+					$this->query_result = $cache->sql_save($this, $query, $this->query_result, $cache_ttl);
 				}
 				else if (strpos($query, 'SELECT') === 0 && $this->query_result)
 				{
@@ -285,7 +278,7 @@ class dbal_postgres extends dbal
 			$query_id = $this->query_result;
 		}
 
-		if ($cache->sql_exists($query_id))
+		if ($cache && $cache->sql_exists($query_id))
 		{
 			return $cache->sql_fetchrow($query_id);
 		}
@@ -306,7 +299,7 @@ class dbal_postgres extends dbal
 			$query_id = $this->query_result;
 		}
 
-		if ($cache->sql_exists($query_id))
+		if ($cache && $cache->sql_exists($query_id))
 		{
 			return $cache->sql_rowseek($rownum, $query_id);
 		}
@@ -355,7 +348,7 @@ class dbal_postgres extends dbal
 			$query_id = $this->query_result;
 		}
 
-		if ($cache->sql_exists($query_id))
+		if ($cache && $cache->sql_exists($query_id))
 		{
 			return $cache->sql_freeresult($query_id);
 		}
diff --git a/phpBB/includes/db/sqlite.php b/phpBB/includes/db/driver/sqlite.php
index 5fc89ced18..7188f0daa2 100644
--- a/phpBB/includes/db/sqlite.php
+++ b/phpBB/includes/db/driver/sqlite.php
@@ -15,15 +15,15 @@ if (!defined('IN_PHPBB'))
 	exit;
 }
 
-include_once($phpbb_root_path . 'includes/db/dbal.' . $phpEx);
-
 /**
 * Sqlite Database Abstraction Layer
 * Minimum Requirement: 2.8.2+
 * @package dbal
 */
-class dbal_sqlite extends dbal
+class phpbb_db_driver_sqlite extends phpbb_db_driver
 {
+	var $connect_error = '';
+
 	/**
 	* Connect to server
 	*/
@@ -35,7 +35,24 @@ class dbal_sqlite extends dbal
 		$this->dbname = $database;
 
 		$error = '';
-		$this->db_connect_id = ($this->persistency) ? @sqlite_popen($this->server, 0666, $error) : @sqlite_open($this->server, 0666, $error);
+		if ($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)
 		{
@@ -117,7 +134,7 @@ class dbal_sqlite extends dbal
 				$this->sql_report('start', $query);
 			}
 
-			$this->query_result = ($cache_ttl) ? $cache->sql_load($query) : false;
+			$this->query_result = ($cache && $cache_ttl) ? $cache->sql_load($query) : false;
 			$this->sql_add_num_queries($this->query_result);
 
 			if ($this->query_result === false)
@@ -132,10 +149,10 @@ class dbal_sqlite extends dbal
 					$this->sql_report('stop', $query);
 				}
 
-				if ($cache_ttl)
+				if ($cache && $cache_ttl)
 				{
 					$this->open_queries[(int) $this->query_result] = $this->query_result;
-					$this->query_result = $cache->sql_save($query, $this->query_result, $cache_ttl);
+					$this->query_result = $cache->sql_save($this, $query, $this->query_result, $cache_ttl);
 				}
 				else if (strpos($query, 'SELECT') === 0 && $this->query_result)
 				{
@@ -193,7 +210,7 @@ class dbal_sqlite extends dbal
 			$query_id = $this->query_result;
 		}
 
-		if ($cache->sql_exists($query_id))
+		if ($cache && $cache->sql_exists($query_id))
 		{
 			return $cache->sql_fetchrow($query_id);
 		}
@@ -214,7 +231,7 @@ class dbal_sqlite extends dbal
 			$query_id = $this->query_result;
 		}
 
-		if ($cache->sql_exists($query_id))
+		if ($cache && $cache->sql_exists($query_id))
 		{
 			return $cache->sql_rowseek($rownum, $query_id);
 		}
@@ -242,7 +259,7 @@ class dbal_sqlite extends dbal
 			$query_id = $this->query_result;
 		}
 
-		if ($cache->sql_exists($query_id))
+		if ($cache && $cache->sql_exists($query_id))
 		{
 			return $cache->sql_freeresult($query_id);
 		}
@@ -280,10 +297,22 @@ class dbal_sqlite extends dbal
 	*/
 	function _sql_error()
 	{
-		return array(
-			'message'	=> @sqlite_error_string(@sqlite_last_error($this->db_connect_id)),
-			'code'		=> @sqlite_last_error($this->db_connect_id)
-		);
+		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;
 	}
 
 	/**
diff --git a/phpBB/includes/db/migration/exception.php b/phpBB/includes/db/migration/exception.php
new file mode 100644
index 0000000000..e84330dd71
--- /dev/null
+++ b/phpBB/includes/db/migration/exception.php
@@ -0,0 +1,79 @@
+<?php
+/**
+*
+* @package db
+* @copyright (c) 2012 phpBB Group
+* @license http://opensource.org/licenses/gpl-license.php GNU Public License v2
+*
+*/
+
+/**
+* @ignore
+*/
+if (!defined('IN_PHPBB'))
+{
+	exit;
+}
+
+/**
+* The migrator is responsible for applying new migrations in the correct order.
+*
+* @package db
+*/
+class phpbb_db_migration_exception extends \Exception
+{
+	/**
+	* Extra parameters sent to exception to aid in debugging
+	* @var array
+	*/
+	protected $parameters;
+
+	/**
+	* Throw an exception.
+	*
+	* First argument is the error message.
+	* Additional arguments will be output with the error message.
+	*/
+	public function __construct()
+	{
+		$parameters = func_get_args();
+		$message = array_shift($parameters);
+		parent::__construct($message);
+
+		$this->parameters = $parameters;
+	}
+
+	/**
+	* Output the error as a string
+	*
+	* @return string
+	*/
+	public function __toString()
+	{
+		return $this->message . ': ' . var_export($this->parameters, true);
+	}
+
+	/**
+	* Get the parameters
+	*
+	* @return array
+	*/
+	public function getParameters()
+	{
+		return $this->parameters;
+	}
+
+	/**
+	* Get localised message (with $user->lang()) 
+	* 
+	* @param phpbb_user $user
+	* @return string
+	*/
+	public function getLocalisedMessage(phpbb_user $user)
+	{
+		$parameters = $this->getParameters();
+		array_unshift($parameters, $this->getMessage());
+
+		return call_user_func_array(array($user, 'lang'), $parameters);
+	}
+}
diff --git a/phpBB/includes/db/migration/migration.php b/phpBB/includes/db/migration/migration.php
new file mode 100644
index 0000000000..5f14a6953c
--- /dev/null
+++ b/phpBB/includes/db/migration/migration.php
@@ -0,0 +1,190 @@
+<?php
+/**
+*
+* @package db
+* @copyright (c) 2011 phpBB Group
+* @license http://opensource.org/licenses/gpl-license.php GNU Public License v2
+*
+*/
+
+/**
+* @ignore
+*/
+if (!defined('IN_PHPBB'))
+{
+	exit;
+}
+
+/**
+* Abstract base class for database migrations
+*
+* Each migration consists of a set of schema and data changes to be implemented
+* in a subclass. This class provides various utility methods to simplify editing
+* a phpBB.
+*
+* @package db
+*/
+abstract class phpbb_db_migration
+{
+	/** @var phpbb_config */
+	protected $config;
+
+	/** @var phpbb_db_driver */
+	protected $db;
+
+	/** @var phpbb_db_tools */
+	protected $db_tools;
+
+	/** @var string */
+	protected $table_prefix;
+
+	/** @var string */
+	protected $phpbb_root_path;
+
+	/** @var string */
+	protected $php_ext;
+
+	/** @var array Errors, if any occured */
+	protected $errors;
+
+	/** @var array List of queries executed through $this->sql_query() */
+	protected $queries = array();
+
+	/**
+	* Constructor
+	*
+	* @param phpbb_config $config
+	* @param phpbb_db_driver $db
+	* @param phpbb_db_tools $db_tools
+	* @param string $phpbb_root_path
+	* @param string $php_ext
+	* @param string $table_prefix
+	*/
+	public function __construct(phpbb_config $config, phpbb_db_driver $db, phpbb_db_tools $db_tools, $phpbb_root_path, $php_ext, $table_prefix)
+	{
+		$this->config = $config;
+		$this->db = $db;
+		$this->db_tools = $db_tools;
+		$this->table_prefix = $table_prefix;
+
+		$this->phpbb_root_path = $phpbb_root_path;
+		$this->php_ext = $php_ext;
+
+		$this->errors = array();
+	}
+
+	/**
+	* Defines other migrations to be applied first
+	*
+	* @return array An array of migration class names
+	*/
+	static public function depends_on()
+	{
+		return array();
+	}
+
+	/**
+	* 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()
+	{
+		return false;
+	}
+
+	/**
+	* 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()
+	{
+		return array();
+	}
+
+	/**
+	* 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()
+	{
+		return array();
+	}
+
+	/**
+	* Updates data by returning a list of instructions to be executed
+	*
+	* @return array Array of data update instructions
+	*/
+	public function update_data()
+	{
+		return array();
+	}
+
+	/**
+	* 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()
+	{
+		return array();
+	}
+
+	/**
+	* Wrapper for running queries to generate user feedback on updates
+	*
+	* @param string $sql SQL query to run on the database
+	* @return mixed Query result from db->sql_query()
+	*/
+	protected function sql_query($sql)
+	{
+		$this->queries[] = $sql;
+
+		$this->db->sql_return_on_error(true);
+
+		if ($sql === 'begin')
+		{
+			$result = $this->db->sql_transaction('begin');
+		}
+		else if ($sql === 'commit')
+		{
+			$result = $this->db->sql_transaction('commit');
+		}
+		else
+		{
+			$result = $this->db->sql_query($sql);
+			if ($this->db->sql_error_triggered)
+			{
+				$this->errors[] = array(
+					'sql'	=> $this->db->sql_error_sql,
+					'code'	=> $this->db->sql_error_returned,
+				);
+			}
+		}
+
+		$this->db->sql_return_on_error(false);
+
+		return $result;
+	}
+
+	/**
+	* Get the list of queries run
+	*
+	* @return array
+	*/
+	public function get_queries()
+	{
+		return $this->queries;
+	}
+}
diff --git a/phpBB/includes/db/migration/tool/config.php b/phpBB/includes/db/migration/tool/config.php
new file mode 100644
index 0000000000..458a25fb66
--- /dev/null
+++ b/phpBB/includes/db/migration/tool/config.php
@@ -0,0 +1,150 @@
+<?php
+/**
+*
+* @package migration
+* @copyright (c) 2012 phpBB Group
+* @license http://opensource.org/licenses/gpl-license.php GNU Public License v2
+*
+*/
+
+/**
+* Migration config tool
+*
+* @package db
+*/
+class phpbb_db_migration_tool_config implements phpbb_db_migration_tool_interface
+{
+	/** @var phpbb_config */
+	protected $config;
+
+	/**
+	* Constructor
+	*
+	* @param phpbb_config $config
+	*/
+	public function __construct(phpbb_config $config)
+	{
+		$this->config = $config;
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function get_name()
+	{
+		return 'config';
+	}
+
+	/**
+	* Add a config setting.
+	*
+	* @param string $config_name The name of the config setting
+	* 	you would like to add
+	* @param mixed $config_value The value of the config setting
+	* @param bool $is_dynamic True if it is dynamic (changes very often)
+	* 	and should not be stored in the cache, false if not.
+	* @return null
+	*/
+	public function add($config_name, $config_value, $is_dynamic = false)
+	{
+		if (isset($this->config[$config_name]))
+		{
+			throw new phpbb_db_migration_exception('CONFIG_ALREADY_EXIST', $config_name);
+		}
+
+		$this->config->set($config_name, $config_value, !$is_dynamic);
+	}
+
+	/**
+	* Update an existing config setting.
+	*
+	* @param string $config_name The name of the config setting you would
+	* 	like to update
+	* @param mixed $config_value The value of the config setting
+	* @return null
+	*/
+	public function update($config_name, $config_value)
+	{
+		if (!isset($this->config[$config_name]))
+		{
+			throw new phpbb_db_migration_exception('CONFIG_NOT_EXIST', $config_name);
+		}
+
+		$this->config->set($config_name, $config_value);
+	}
+
+	/**
+	* Update a config setting if the first argument equal to the
+	* current config value
+	*
+	* @param string $compare If equal to the current config value, will be
+	* 	updated to the new config value, otherwise not
+	* @param string $config_name The name of the config setting you would
+	* 	like to update
+	* @param mixed $config_value The value of the config setting
+	* @return null
+	*/
+	public function update_if_equals($compare, $config_name, $config_value)
+	{
+		if (!isset($this->config[$config_name]))
+		{
+			throw new phpbb_db_migration_exception('CONFIG_NOT_EXIST', $config_name);
+		}
+
+		$this->config->set_atomic($config_name, $compare, $config_value);
+	}
+
+	/**
+	* Remove an existing config setting.
+	*
+	* @param string $config_name The name of the config setting you would
+	* 	like to remove
+	* @return null
+	*/
+	public function remove($config_name)
+	{
+		if (!isset($this->config[$config_name]))
+		{
+			throw new phpbb_db_migration_exception('CONFIG_NOT_EXIST', $config_name);
+		}
+
+		$this->config->delete($config_name);
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function reverse()
+	{
+		$arguments = func_get_args();
+		$original_call = array_shift($arguments);
+
+		$call = false;
+		switch ($original_call)
+		{
+			case 'add':
+				$call = 'remove';
+			break;
+
+			case 'remove':
+				$call = 'add';
+			break;
+
+			case 'update_if_equals':
+				$call = 'update_if_equals';
+
+				// Set to the original value if the current value is what we compared to originally
+				$arguments = array(
+					$arguments[2],
+					$arguments[1],
+					$arguments[0],
+				);
+			break;
+		}
+
+		if ($call)
+		{
+			return call_user_func_array(array(&$this, $call), $arguments);
+		}
+	}
+}
diff --git a/phpBB/includes/db/migration/tool/interface.php b/phpBB/includes/db/migration/tool/interface.php
new file mode 100644
index 0000000000..ced53b2023
--- /dev/null
+++ b/phpBB/includes/db/migration/tool/interface.php
@@ -0,0 +1,33 @@
+<?php
+/**
+*
+* @package migration
+* @copyright (c) 2012 phpBB Group
+* @license http://opensource.org/licenses/gpl-license.php GNU Public License v2
+*
+*/
+
+/**
+* Migration tool interface
+*
+* @package db
+*/
+interface phpbb_db_migration_tool_interface
+{
+	/**
+	* Retrieve a short name used for commands in migrations.
+	*
+	* @return string short name
+	*/
+	public function get_name();
+
+	/**
+	* Reverse an original install action
+	*
+	* First argument is the original call to the class (e.g. add, remove)
+	* After the first argument, send the original arguments to the function in the original call
+	*
+	* @return null
+	*/
+	public function reverse();
+}
diff --git a/phpBB/includes/db/migration/tool/module.php b/phpBB/includes/db/migration/tool/module.php
new file mode 100644
index 0000000000..4d7fae2bb0
--- /dev/null
+++ b/phpBB/includes/db/migration/tool/module.php
@@ -0,0 +1,513 @@
+<?php
+/**
+*
+* @package migration
+* @copyright (c) 2012 phpBB Group
+* @license http://opensource.org/licenses/gpl-license.php GNU Public License v2
+*
+*/
+
+/**
+* Migration module management tool
+*
+* @package db
+*/
+class phpbb_db_migration_tool_module implements phpbb_db_migration_tool_interface
+{
+	/** @var phpbb_cache_service */
+	protected $cache;
+
+	/** @var dbal */
+	protected $db;
+
+	/** @var phpbb_user */
+	protected $user;
+
+	/** @var string */
+	protected $phpbb_root_path;
+
+	/** @var string */
+	protected $php_ext;
+
+	/** @var string */
+	protected $modules_table;
+
+	/**
+	* Constructor
+	*
+	* @param phpbb_db_driver $db
+	* @param mixed $cache
+	* @param phpbb_user $user
+	* @param string $phpbb_root_path
+	* @param string $php_ext
+	* @param string $modules_table
+	*/
+	public function __construct(phpbb_db_driver $db, phpbb_cache_service $cache, phpbb_user $user, $phpbb_root_path, $php_ext, $modules_table)
+	{
+		$this->db = $db;
+		$this->cache = $cache;
+		$this->user = $user;
+		$this->phpbb_root_path = $phpbb_root_path;
+		$this->php_ext = $php_ext;
+		$this->modules_table = $modules_table;
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function get_name()
+	{
+		return 'module';
+	}
+
+	/**
+	* Module Exists
+	*
+	* Check if a module exists
+	*
+	* @param string $class The module class(acp|mcp|ucp)
+	* @param int|string|bool $parent The parent module_id|module_langname (0 for no parent).
+	*		Use false to ignore the parent check and check class wide.
+	* @param int|string $module The module_id|module_langname you would like to
+	* 		check for to see if it exists
+	* @return bool true/false if module exists
+	*/
+	public function exists($class, $parent, $module)
+	{
+		// the main root directory should return true
+		if (!$module)
+		{
+			return true;
+		}
+
+		$parent_sql = '';
+		if ($parent !== false)
+		{
+			// Allows '' to be sent as 0
+			$parent = $parent ?: 0;
+
+			if (!is_numeric($parent))
+			{
+				$sql = 'SELECT module_id
+					FROM ' . $this->modules_table . "
+					WHERE module_langname = '" . $this->db->sql_escape($parent) . "'
+						AND module_class = '" . $this->db->sql_escape($class) . "'";
+				$result = $this->db->sql_query($sql);
+				$module_id = $this->db->sql_fetchfield('module_id');
+				$this->db->sql_freeresult($result);
+
+				if (!$module_id)
+				{
+					return false;
+				}
+
+				$parent_sql = 'AND parent_id = ' . (int) $module_id;
+			}
+			else
+			{
+				$parent_sql = 'AND parent_id = ' . (int) $parent;
+			}
+		}
+
+		$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)
+		{
+			return true;
+		}
+
+		return false;
+	}
+
+	/**
+	* Module Add
+	*
+	* Add a new module
+	*
+	* @param string $class The module class(acp|mcp|ucp)
+	* @param int|string $parent The parent module_id|module_langname (0 for no parent)
+	* @param array $data an array of the data on the new module.
+	* 	This can be setup in two different ways.
+	*	1. The "manual" way.  For inserting a category or one at a time.
+	*		It will be merged with the base array shown a bit below,
+	*			but at the least requires 'module_langname' to be sent, and,
+	*			if you want to create a module (instead of just a category) you must
+	*			send module_basename and module_mode.
+	*		array(
+	*			'module_enabled'	=> 1,
+	*			'module_display'	=> 1,
+	*	   		'module_basename'	=> '',
+	*			'module_class'		=> $class,
+	*	   		'parent_id'			=> (int) $parent,
+	*			'module_langname'	=> '',
+	*	   		'module_mode'		=> '',
+	*	   		'module_auth'		=> '',
+	*		)
+	*	2. The "automatic" way.  For inserting multiple at a time based on the
+	*			specs in the info file for the module(s).  For this to work the
+	*			modules must be correctly setup in the info file.
+	*		An example follows (this would insert the settings, log, and flag
+	*			modes from the includes/acp/info/acp_asacp.php file):
+	* 		array(
+	* 			'module_basename'	=> 'asacp',
+	* 			'modes'				=> array('settings', 'log', 'flag'),
+	* 		)
+	* 		Optionally you may not send 'modes' and it will insert all of the
+	* 			modules in that info file.
+	* @param string|bool $include_path If you would like to use a custom include
+	* 	path, specify that here
+	* @return null
+	*/
+	public function add($class, $parent = 0, $data = array(), $include_path = false)
+	{
+		// Allows '' to be sent as 0
+		$parent = $parent ?: 0;
+
+		// allow sending the name as a string in $data to create a category
+		if (!is_array($data))
+		{
+			$data = array('module_langname' => $data);
+		}
+
+		if (!isset($data['module_langname']))
+		{
+			// The "automatic" way
+			$basename = (isset($data['module_basename'])) ? $data['module_basename'] : '';
+			$basename = str_replace(array('/', '\\'), '', $basename);
+			$class = str_replace(array('/', '\\'), '', $class);
+
+			$include_path = ($include_path === false) ? $this->phpbb_root_path . 'includes/' : $include_path;
+			$info_file = "$class/info/$basename.{$this->php_ext}";
+
+			// The manual and automatic ways both failed...
+			if (!file_exists($include_path . $info_file))
+			{
+				throw new phpbb_db_migration_exception('MODULE_INFO_FILE_NOT_EXIST', $class, $info_file);
+			}
+
+			$classname = "{$basename}_info";
+
+			if (!class_exists($classname))
+			{
+				include($include_path . $info_file);
+			}
+
+			$info = new $classname;
+			$module = $info->module();
+			unset($info);
+
+			$result = '';
+			foreach ($module['modes'] as $mode => $module_info)
+			{
+				if (!isset($data['modes']) || in_array($mode, $data['modes']))
+				{
+					$new_module = array(
+						'module_basename'	=> $basename,
+						'module_langname'	=> $module_info['title'],
+						'module_mode'		=> $mode,
+						'module_auth'		=> $module_info['auth'],
+						'module_display'	=> (isset($module_info['display'])) ? $module_info['display'] : true,
+						'before'			=> (isset($module_info['before'])) ? $module_info['before'] : false,
+						'after'				=> (isset($module_info['after'])) ? $module_info['after'] : false,
+					);
+
+					// Run the "manual" way with the data we've collected.
+					$this->add($class, $parent, $new_module);
+				}
+			}
+
+			return;
+		}
+
+		// The "manual" way
+		$module_log_name = ((isset($this->user->lang[$data['module_langname']])) ? $this->user->lang[$data['module_langname']] : $data['module_langname']);
+		add_log('admin', 'LOG_MODULE_ADD', $module_log_name);
+
+		if (!is_numeric($parent))
+		{
+			$sql = 'SELECT module_id
+				FROM ' . $this->modules_table . "
+				WHERE module_langname = '" . $this->db->sql_escape($parent) . "'
+					AND module_class = '" . $this->db->sql_escape($class) . "'";
+			$result = $this->db->sql_query($sql);
+			$module_id = $this->db->sql_fetchfield('module_id');
+			$this->db->sql_freeresult($result);
+
+			if (!$module_id)
+			{
+				throw new phpbb_db_migration_exception('MODULE_NOT_EXIST', $parent);
+			}
+
+			$parent = $data['parent_id'] = $module_id;
+		}
+		else if (!$this->exists($class, false, $parent))
+		{
+			throw new phpbb_db_migration_exception('MODULE_NOT_EXIST', $parent);
+		}
+
+		if ($this->exists($class, $parent, $data['module_langname']))
+		{
+			throw new phpbb_db_migration_exception('MODULE_ALREADY_EXIST', $data['module_langname']);
+		}
+
+		if (!class_exists('acp_modules'))
+		{
+			include($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', $result);
+		}
+		else
+		{
+			// Success
+
+			// Move the module if requested above/below an existing one
+			if (isset($data['before']) && $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');
+
+				$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);
+
+				$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
+					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');
+
+				$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);
+
+				$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);
+			}
+		}
+
+		// Clear the Modules Cache
+		$this->cache->destroy("_modules_$class");
+	}
+
+	/**
+	* Module Remove
+	*
+	* Remove a module
+	*
+	* @param string $class The module class(acp|mcp|ucp)
+	* @param int|string|bool $parent The parent module_id|module_langname(0 for no parent).
+	* 	Use false to ignore the parent check and check class wide.
+	* @param int|string $module The module id|module_langname
+	* @param string|bool $include_path If you would like to use a custom include path,
+	* 	specify that here
+	* @return null
+	*/
+	public function remove($class, $parent = 0, $module = '', $include_path = false)
+	{
+		// Imitation of module_add's "automatic" and "manual" method so the uninstaller works from the same set of instructions for umil_auto
+		if (is_array($module))
+		{
+			if (isset($module['module_langname']))
+			{
+				// Manual Method
+				return $this->remove($class, $parent, $module['module_langname'], $include_path);
+			}
+
+			// Failed.
+			if (!isset($module['module_basename']))
+			{
+				throw new phpbb_db_migration_exception('MODULE_NOT_EXIST');
+			}
+
+			// Automatic method
+			$basename = str_replace(array('/', '\\'), '', $module['module_basename']);
+			$class = str_replace(array('/', '\\'), '', $class);
+
+			$include_path = ($include_path === false) ? $this->phpbb_root_path . 'includes/' : $include_path;
+			$info_file = "$class/info/$basename.{$this->php_ext}";
+
+			if (!file_exists($include_path . $info_file))
+			{
+				throw new phpbb_db_migration_exception('MODULE_NOT_EXIST', $info_file);
+			}
+
+			$classname = "{$basename}_info";
+
+			if (!class_exists($classname))
+			{
+				include($include_path . $info_file);
+			}
+
+			$info = new $classname;
+			$module_info = $info->module();
+			unset($info);
+
+			foreach ($module_info['modes'] as $mode => $info)
+			{
+				if (!isset($module['modes']) || in_array($mode, $module['modes']))
+				{
+					$this->remove($class, $parent, $info['title']) . '<br />';
+				}
+			}
+		}
+		else
+		{
+			if (!$this->exists($class, $parent, $module))
+			{
+				throw new phpbb_db_migration_exception('MODULE_NOT_EXIST', ((isset($this->user->lang[$module])) ? $this->user->lang[$module] : $module));
+			}
+
+			$parent_sql = '';
+			if ($parent !== false)
+			{
+				// Allows '' to be sent as 0
+				$parent = ($parent) ?: 0;
+
+				if (!is_numeric($parent))
+				{
+					$sql = 'SELECT module_id
+						FROM ' . $this->modules_table . "
+						WHERE module_langname = '" . $this->db->sql_escape($parent) . "'
+							AND module_class = '" . $this->db->sql_escape($class) . "'";
+					$result = $this->db->sql_query($sql);
+					$module_id = $this->db->sql_fetchfield('module_id');
+					$this->db->sql_freeresult($result);
+
+					// we know it exists from the module_exists check
+					$parent_sql = 'AND parent_id = ' . (int) $module_id;
+				}
+				else
+				{
+					$parent_sql = 'AND parent_id = ' . (int) $parent;
+				}
+			}
+
+			$module_ids = array();
+			if (!is_numeric($module))
+			{
+				$sql = 'SELECT module_id
+					FROM ' . $this->modules_table . "
+					WHERE module_langname = '" . $this->db->sql_escape($module) . "'
+						AND module_class = '" . $this->db->sql_escape($class) . "'
+						$parent_sql";
+				$result = $this->db->sql_query($sql);
+				while ($module_id = $this->db->sql_fetchfield('module_id'))
+				{
+					$module_ids[] = (int) $module_id;
+				}
+				$this->db->sql_freeresult($result);
+
+				$module_name = $module;
+			}
+			else
+			{
+				$module = (int) $module;
+				$sql = 'SELECT module_langname
+					FROM ' . $this->modules_table . "
+					WHERE module_id = $module
+						AND module_class = '" . $this->db->sql_escape($class) . "'
+						$parent_sql";
+				$result = $this->db->sql_query($sql);
+				$module_name = $this->db->sql_fetchfield('module_id');
+				$this->db->sql_freeresult($result);
+
+				$module_ids[] = $module;
+			}
+
+			if (!class_exists('acp_modules'))
+			{
+				include($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))
+				{
+					throw new phpbb_db_migration_exception('MODULE_NOT_REMOVABLE', $module_id, $result);
+				}
+			}
+
+			$this->cache->destroy("_modules_$class");
+		}
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function reverse()
+	{
+		$arguments = func_get_args();
+		$original_call = array_shift($arguments);
+
+		$call = false;
+		switch ($original_call)
+		{
+			case 'add':
+				$call = 'remove';
+			break;
+
+			case 'remove':
+				$call = 'add';
+			break;
+		}
+
+		if ($call)
+		{
+			return call_user_func_array(array(&$this, $call), $arguments);
+		}
+	}
+}
diff --git a/phpBB/includes/db/migration/tool/permission.php b/phpBB/includes/db/migration/tool/permission.php
new file mode 100644
index 0000000000..4231fbe1dd
--- /dev/null
+++ b/phpBB/includes/db/migration/tool/permission.php
@@ -0,0 +1,622 @@
+<?php
+/**
+*
+* @package migration
+* @copyright (c) 2012 phpBB Group
+* @license http://opensource.org/licenses/gpl-license.php GNU Public License v2
+*
+*/
+
+/**
+* Migration permission management tool
+*
+* @package db
+*/
+class phpbb_db_migration_tool_permission implements phpbb_db_migration_tool_interface
+{
+	/** @var phpbb_auth */
+	protected $auth;
+
+	/** @var phpbb_cache_service */
+	protected $cache;
+
+	/** @var dbal */
+	protected $db;
+
+	/** @var string */
+	protected $phpbb_root_path;
+
+	/** @var string */
+	protected $php_ext;
+
+	/**
+	* Constructor
+	*
+	* @param phpbb_db_driver $db
+	* @param mixed $cache
+	* @param phpbb_auth $auth
+	* @param string $phpbb_root_path
+	* @param string $php_ext
+	*/
+	public function __construct(phpbb_db_driver $db, phpbb_cache_service $cache, phpbb_auth $auth, $phpbb_root_path, $php_ext)
+	{
+		$this->db = $db;
+		$this->cache = $cache;
+		$this->auth = $auth;
+		$this->phpbb_root_path = $phpbb_root_path;
+		$this->php_ext = $php_ext;
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function get_name()
+	{
+		return 'permission';
+	}
+
+	/**
+	* Permission Exists
+	*
+	* Check if a permission (auth) setting exists
+	*
+	* @param string $auth_option The name of the permission (auth) option
+	* @param bool $global True for checking a global permission setting,
+	* 	False for a local permission setting
+	* @return bool true if it exists, false if not
+	*/
+	public function exists($auth_option, $global = true)
+	{
+		if ($global)
+		{
+			$type_sql = ' AND is_global = 1';
+		}
+		else
+		{
+			$type_sql = ' AND is_local = 1';
+		}
+
+		$sql = 'SELECT auth_option_id
+			FROM ' . ACL_OPTIONS_TABLE . "
+			WHERE auth_option = '" . $this->db->sql_escape($auth_option) . "'"
+				. $type_sql;
+		$result = $this->db->sql_query($sql);
+
+		$row = $this->db->sql_fetchrow($result);
+		$this->db->sql_freeresult($result);
+
+		if ($row)
+		{
+			return true;
+		}
+
+		return false;
+	}
+
+	/**
+	* Permission Add
+	*
+	* Add a permission (auth) option
+	*
+	* @param string $auth_option The name of the permission (auth) option
+	* @param bool $global True for checking a global permission setting,
+	* 	False for a local permission setting
+	* @return null
+	*/
+	public function add($auth_option, $global = true, $copy_from = false)
+	{
+		if ($this->exists($auth_option, $global))
+		{
+			throw new phpbb_db_migration_exception('PERMISSION_ALREADY_EXIST', $auth_option);
+		}
+
+		// We've added permissions, so set to true to notify the user.
+		$this->permissions_added = true;
+
+		if (!class_exists('auth_admin'))
+		{
+			include($this->phpbb_root_path . 'includes/acp/auth.' . $this->php_ext);
+		}
+		$auth_admin = new auth_admin();
+
+		// We have to add a check to see if the !$global (if global, local, and if local, global) permission already exists.  If it does, acl_add_option currently has a bug which would break the ACL system, so we are having a work-around here.
+		if ($this->exists($auth_option, !$global))
+		{
+			$sql_ary = array(
+				'is_global'	=> 1,
+				'is_local'	=> 1,
+			);
+			$sql = 'UPDATE ' . ACL_OPTIONS_TABLE . '
+				SET ' . $this->db->sql_build_array('UPDATE', $sql_ary) . "
+				WHERE auth_option = '" . $this->db->sql_escape($auth_option) . "'";
+			$this->db->sql_query($sql);
+		}
+		else
+		{
+			if ($global)
+			{
+				$auth_admin->acl_add_option(array('global' => array($auth_option)));
+			}
+			else
+			{
+				$auth_admin->acl_add_option(array('local' => array($auth_option)));
+			}
+		}
+
+		// The permission has been added, now we can copy it if needed
+		if ($copy_from && isset($auth_admin->acl_options['id'][$copy_from]))
+		{
+			$old_id = $auth_admin->acl_options['id'][$copy_from];
+			$new_id = $auth_admin->acl_options['id'][$auth_option];
+
+			$tables = array(ACL_GROUPS_TABLE, ACL_ROLES_DATA_TABLE, ACL_USERS_TABLE);
+
+			foreach ($tables as $table)
+			{
+				$sql = 'SELECT *
+					FROM ' . $table . '
+					WHERE auth_option_id = ' . $old_id;
+				$result = $this->db->sql_query($sql);
+
+				$sql_ary = array();
+				while ($row = $this->db->sql_fetchrow($result))
+				{
+					$row['auth_option_id'] = $new_id;
+					$sql_ary[] = $row;
+				}
+				$this->db->sql_freeresult($result);
+
+				if (!empty($sql_ary))
+				{
+					$this->db->sql_multi_insert($table, $sql_ary);
+				}
+			}
+
+			$auth_admin->acl_clear_prefetch();
+		}
+	}
+
+	/**
+	* Permission Remove
+	*
+	* Remove a permission (auth) option
+	*
+	* @param string $auth_option The name of the permission (auth) option
+	* @param bool $global True for checking a global permission setting,
+	* 	False for a local permission setting
+	* @return null
+	*/
+	public function remove($auth_option, $global = true)
+	{
+		if (!$this->exists($auth_option, $global))
+		{
+			throw new phpbb_db_migration_exception('PERMISSION_NOT_EXIST', $auth_option);
+		}
+
+		if ($global)
+		{
+			$type_sql = ' AND is_global = 1';
+		}
+		else
+		{
+			$type_sql = ' AND is_local = 1';
+		}
+		$sql = 'SELECT auth_option_id, is_global, is_local
+			FROM ' . ACL_OPTIONS_TABLE . "
+			WHERE auth_option = '" . $this->db->sql_escape($auth_option) . "'" .
+				$type_sql;
+		$result = $this->db->sql_query($sql);
+		$row = $this->db->sql_fetchrow($result);
+		$this->db->sql_freeresult($result);
+
+		$id = (int) $row['auth_option_id'];
+
+		// If it is a local and global permission, do not remove the row! :P
+		if ($row['is_global'] && $row['is_local'])
+		{
+			$sql = 'UPDATE ' . ACL_OPTIONS_TABLE . '
+				SET ' . (($global) ? 'is_global = 0' : 'is_local = 0') . '
+				WHERE auth_option_id = ' . $id;
+			$this->db->sql_query($sql);
+		}
+		else
+		{
+			// Delete time
+			$tables = array(ACL_GROUPS_TABLE, ACL_ROLES_DATA_TABLE, ACL_USERS_TABLE, ACL_OPTIONS_TABLE);
+			foreach ($tables as $table)
+			{
+				$this->db->sql_query('DELETE FROM ' . $table . '
+					WHERE auth_option_id = ' . $id);
+			}
+		}
+
+		// Purge the auth cache
+		$this->cache->destroy('_acl_options');
+		$this->auth->acl_clear_prefetch();
+	}
+
+	/**
+	* Add a new permission role
+	*
+	* @param string $role_name The new role name
+	* @param sting $role_type The type (u_, m_, a_)
+	* @return null
+	*/
+	public function role_add($role_name, $role_type, $role_description = '')
+	{
+		$sql = 'SELECT role_id
+			FROM ' . ACL_ROLES_TABLE . "
+			WHERE role_name = '" . $this->db->sql_escape($role_name) . "'";
+		$this->db->sql_query($sql);
+		$role_id = (int) $this->db->sql_fetchfield('role_id');
+
+		if ($role_id)
+		{
+			return;
+		}
+
+		$sql = 'SELECT MAX(role_order) AS max_role_order
+			FROM ' . ACL_ROLES_TABLE . "
+			WHERE role_type = '" . $this->db->sql_escape($role_type) . "'";
+		$this->db->sql_query($sql);
+		$role_order = (int) $this->db->sql_fetchfield('max_role_order');
+		$role_order = (!$role_order) ? 1 : $role_order + 1;
+
+		$sql_ary = array(
+			'role_name'			=> $role_name,
+			'role_description'	=> $role_description,
+			'role_type'			=> $role_type,
+			'role_order'		=> $role_order,
+		);
+
+		$sql = 'INSERT INTO ' . ACL_ROLES_TABLE . ' ' . $this->db->sql_build_array('INSERT', $sql_ary);
+		$this->db->sql_query($sql);
+	}
+
+	/**
+	* Update the name on a permission role
+	*
+	* @param string $old_role_name The old role name
+	* @param string $new_role_name The new role name
+	* @return null
+	*/
+	public function role_update($old_role_name, $new_role_name)
+	{
+		$sql = 'SELECT role_id
+			FROM ' . ACL_ROLES_TABLE . "
+			WHERE role_name = '" . $this->db->sql_escape($old_role_name) . "'";
+		$this->db->sql_query($sql);
+		$role_id = (int) $this->db->sql_fetchfield('role_id');
+
+		if (!$role_id)
+		{
+			throw new phpbb_db_migration_exception('ROLE_NOT_EXIST', $old_role_name);
+		}
+
+		$sql = 'UPDATE ' . ACL_ROLES_TABLE . "
+			SET role_name = '" . $this->db->sql_escape($new_role_name) . "'
+			WHERE role_name = '" . $this->db->sql_escape($old_role_name) . "'";
+		$this->db->sql_query($sql);
+	}
+
+	/**
+	* Remove a permission role
+	*
+	* @param string $role_name The role name to remove
+	* @return null
+	*/
+	public function role_remove($role_name)
+	{
+		$sql = 'SELECT role_id
+			FROM ' . ACL_ROLES_TABLE . "
+			WHERE role_name = '" . $this->db->sql_escape($role_name) . "'";
+		$this->db->sql_query($sql);
+		$role_id = (int) $this->db->sql_fetchfield('role_id');
+
+		if (!$role_id)
+		{
+			throw new phpbb_db_migration_exception('ROLE_NOT_EXIST', $role_name);
+		}
+
+		$sql = 'DELETE FROM ' . ACL_ROLES_DATA_TABLE . '
+			WHERE role_id = ' . $role_id;
+		$this->db->sql_query($sql);
+
+		$sql = 'DELETE FROM ' . ACL_ROLES_TABLE . '
+			WHERE role_id = ' . $role_id;
+		$this->db->sql_query($sql);
+
+		$this->auth->acl_clear_prefetch();
+	}
+
+	/**
+	* Permission Set
+	*
+	* Allows you to set permissions for a certain group/role
+	*
+	* @param string $name The name of the role/group
+	* @param string|array $auth_option The auth_option or array of
+	* 	auth_options you would like to set
+	* @param string $type The type (role|group)
+	* @param bool $has_permission True if you want to give them permission,
+	* 	false if you want to deny them permission
+	* @return null
+	*/
+	public function permission_set($name, $auth_option, $type = 'role', $has_permission = true)
+	{
+		if (!is_array($auth_option))
+		{
+			$auth_option = array($auth_option);
+		}
+
+		$new_auth = array();
+		$sql = 'SELECT auth_option_id
+			FROM ' . ACL_OPTIONS_TABLE . '
+			WHERE ' . $this->db->sql_in_set('auth_option', $auth_option);
+		$result = $this->db->sql_query($sql);
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			$new_auth[] = (int) $row['auth_option_id'];
+		}
+		$this->db->sql_freeresult($result);
+
+		if (empty($new_auth))
+		{
+			return;
+		}
+
+		$current_auth = array();
+
+		$type = (string) $type; // Prevent PHP bug.
+
+		switch ($type)
+		{
+			case 'role':
+				$sql = 'SELECT role_id
+					FROM ' . ACL_ROLES_TABLE . "
+					WHERE role_name = '" . $this->db->sql_escape($name) . "'";
+				$this->db->sql_query($sql);
+				$role_id = (int) $this->db->sql_fetchfield('role_id');
+
+				if (!$role_id)
+				{
+					throw new phpbb_db_migration_exception('ROLE_NOT_EXIST', $name);
+				}
+
+				$sql = 'SELECT auth_option_id, auth_setting
+					FROM ' . ACL_ROLES_DATA_TABLE . '
+					WHERE role_id = ' . $role_id;
+				$result = $this->db->sql_query($sql);
+				while ($row = $this->db->sql_fetchrow($result))
+				{
+					$current_auth[$row['auth_option_id']] = $row['auth_setting'];
+				}
+				$this->db->sql_freeresult($result);
+			break;
+
+			case 'group':
+				$sql = 'SELECT group_id
+					FROM ' . GROUPS_TABLE . "
+					WHERE group_name = '" . $this->db->sql_escape($name) . "'";
+				$this->db->sql_query($sql);
+				$group_id = (int) $this->db->sql_fetchfield('group_id');
+
+				if (!$group_id)
+				{
+					throw new phpbb_db_migration_exception('GROUP_NOT_EXIST', $name);
+				}
+
+				// If the group has a role set for them we will add the requested permissions to that role.
+				$sql = 'SELECT auth_role_id
+					FROM ' . ACL_GROUPS_TABLE . '
+					WHERE group_id = ' . $group_id . '
+						AND auth_role_id <> 0
+						AND forum_id = 0';
+				$this->db->sql_query($sql);
+				$role_id = (int) $this->db->sql_fetchfield('auth_role_id');
+				if ($role_id)
+				{
+					$sql = 'SELECT role_name
+						FROM ' . ACL_ROLES_TABLE . '
+						WHERE role_id = ' . $role_id;
+					$this->db->sql_query($sql);
+					$role_name = $this->db->sql_fetchfield('role_name');
+
+					return $this->set($role_name, $auth_option, 'role', $has_permission);
+				}
+
+				$sql = 'SELECT auth_option_id, auth_setting
+					FROM ' . ACL_GROUPS_TABLE . '
+					WHERE group_id = ' . $group_id;
+				$result = $this->db->sql_query($sql);
+				while ($row = $this->db->sql_fetchrow($result))
+				{
+					$current_auth[$row['auth_option_id']] = $row['auth_setting'];
+				}
+				$this->db->sql_freeresult($result);
+			break;
+		}
+
+		$sql_ary = array();
+		switch ($type)
+		{
+			case 'role':
+				foreach ($new_auth as $auth_option_id)
+				{
+					if (!isset($current_auth[$auth_option_id]))
+					{
+						$sql_ary[] = array(
+							'role_id'			=> $role_id,
+							'auth_option_id'	=> $auth_option_id,
+							'auth_setting'		=> $has_permission,
+						);
+					}
+				}
+
+				$this->db->sql_multi_insert(ACL_ROLES_DATA_TABLE, $sql_ary);
+			break;
+
+			case 'group':
+				foreach ($new_auth as $auth_option_id)
+				{
+					if (!isset($current_auth[$auth_option_id]))
+					{
+						$sql_ary[] = array(
+							'group_id'			=> $group_id,
+							'auth_option_id'	=> $auth_option_id,
+							'auth_setting'		=> $has_permission,
+						);
+					}
+				}
+
+				$this->db->sql_multi_insert(ACL_GROUPS_TABLE, $sql_ary);
+			break;
+		}
+
+		$this->auth->acl_clear_prefetch();
+	}
+
+	/**
+	* Permission Unset
+	*
+	* Allows you to unset (remove) permissions for a certain group/role
+	*
+	* @param string $name The name of the role/group
+	* @param string|array $auth_option The auth_option or array of
+	* 	auth_options you would like to set
+	* @param string $type The type (role|group)
+	* @return null
+	*/
+	public function permission_unset($name, $auth_option, $type = 'role')
+	{
+		if (!is_array($auth_option))
+		{
+			$auth_option = array($auth_option);
+		}
+
+		$to_remove = array();
+		$sql = 'SELECT auth_option_id
+			FROM ' . ACL_OPTIONS_TABLE . '
+			WHERE ' . $this->db->sql_in_set('auth_option', $auth_option);
+		$result = $this->db->sql_query($sql);
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			$to_remove[] = (int) $row['auth_option_id'];
+		}
+		$this->db->sql_freeresult($result);
+
+		if (empty($to_remove))
+		{
+			return;
+		}
+
+		$type = (string) $type; // Prevent PHP bug.
+
+		switch ($type)
+		{
+			case 'role':
+				$sql = 'SELECT role_id
+					FROM ' . ACL_ROLES_TABLE . "
+					WHERE role_name = '" . $this->db->sql_escape($name) . "'";
+				$this->db->sql_query($sql);
+				$role_id = (int) $this->db->sql_fetchfield('role_id');
+
+				if (!$role_id)
+				{
+					throw new phpbb_db_migration_exception('ROLE_NOT_EXIST', $name);
+				}
+
+				$sql = 'DELETE FROM ' . ACL_ROLES_DATA_TABLE . '
+					WHERE ' . $this->db->sql_in_set('auth_option_id', $to_remove);
+				$this->db->sql_query($sql);
+			break;
+
+			case 'group':
+				$sql = 'SELECT group_id
+					FROM ' . GROUPS_TABLE . "
+					WHERE group_name = '" . $this->db->sql_escape($name) . "'";
+				$this->db->sql_query($sql);
+				$group_id = (int) $this->db->sql_fetchfield('group_id');
+
+				if (!$group_id)
+				{
+					throw new phpbb_db_migration_exception('GROUP_NOT_EXIST', $name);
+				}
+
+				// If the group has a role set for them we will remove the requested permissions from that role.
+				$sql = 'SELECT auth_role_id
+					FROM ' . ACL_GROUPS_TABLE . '
+					WHERE group_id = ' . $group_id . '
+						AND auth_role_id <> 0';
+				$this->db->sql_query($sql);
+				$role_id = (int) $this->db->sql_fetchfield('auth_role_id');
+				if ($role_id)
+				{
+					$sql = 'SELECT role_name
+						FROM ' . ACL_ROLES_TABLE . '
+						WHERE role_id = ' . $role_id;
+					$this->db->sql_query($sql);
+					$role_name = $this->db->sql_fetchfield('role_name');
+
+					return $this->permission_unset($role_name, $auth_option, 'role');
+				}
+
+				$sql = 'DELETE FROM ' . ACL_GROUPS_TABLE . '
+					WHERE ' . $this->db->sql_in_set('auth_option_id', $to_remove);
+				$this->db->sql_query($sql);
+			break;
+		}
+
+		$this->auth->acl_clear_prefetch();
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
+	public function reverse()
+	{
+		$arguments = func_get_args();
+		$original_call = array_shift($arguments);
+
+		$call = false;
+		switch ($original_call)
+		{
+			case 'add':
+				$call = 'remove';
+			break;
+
+			case 'remove':
+				$call = 'add';
+			break;
+
+			case 'permission_set':
+				$call = 'permission_unset';
+			break;
+
+			case 'permission_unset':
+				$call = 'permission_set';
+			break;
+
+			case 'role_add':
+				$call = 'role_remove';
+			break;
+
+			case 'role_remove':
+				$call = 'role_add';
+			break;
+
+			case 'role_update':
+				// Set to the original value if the current value is what we compared to originally
+				$arguments = array(
+					$arguments[1],
+					$arguments[0],
+				);
+			break;
+		}
+
+		if ($call)
+		{
+			return call_user_func_array(array(&$this, $call), $arguments);
+		}
+	}
+}
diff --git a/phpBB/includes/db/migrator.php b/phpBB/includes/db/migrator.php
new file mode 100644
index 0000000000..41d996b1e3
--- /dev/null
+++ b/phpBB/includes/db/migrator.php
@@ -0,0 +1,764 @@
+<?php
+/**
+*
+* @package db
+* @copyright (c) 2011 phpBB Group
+* @license http://opensource.org/licenses/gpl-license.php GNU Public License
+*
+*/
+
+/**
+* @ignore
+*/
+if (!defined('IN_PHPBB'))
+{
+	exit;
+}
+
+/**
+* The migrator is responsible for applying new migrations in the correct order.
+*
+* @package db
+*/
+class phpbb_db_migrator
+{
+	/** @var phpbb_config */
+	protected $config;
+
+	/** @var phpbb_db_driver */
+	protected $db;
+
+	/** @var phpbb_db_tools */
+	protected $db_tools;
+
+	/** @var string */
+	protected $table_prefix;
+
+	/** @var string */
+	protected $phpbb_root_path;
+
+	/** @var string */
+	protected $php_ext;
+
+	/** @var string */
+	protected $migrations_table;
+
+	/**
+	* State of all migrations
+	*
+	* (SELECT * FROM migrations table)
+	*
+	* @var array
+	*/
+	protected $migration_state = array();
+
+	/**
+	* Array of all migrations available to be run
+	*
+	* @var array
+	*/
+	protected $migrations = array();
+
+	/**
+	* 'name' and 'class' of the last migration run
+	*
+	* @var array
+	*/
+	public $last_run_migration = false;
+
+	/**
+	* Constructor of the database migrator
+	*/
+	public function __construct(phpbb_config $config, phpbb_db_driver $db, phpbb_db_tools $db_tools, $migrations_table, $phpbb_root_path, $php_ext, $table_prefix, $tools)
+	{
+		$this->config = $config;
+		$this->db = $db;
+		$this->db_tools = $db_tools;
+
+		$this->migrations_table = $migrations_table;
+
+		$this->phpbb_root_path = $phpbb_root_path;
+		$this->php_ext = $php_ext;
+
+		$this->table_prefix = $table_prefix;
+
+		foreach ($tools as $tool)
+		{
+			$this->tools[$tool->get_name()] = $tool;
+		}
+
+		$this->load_migration_state();
+	}
+
+	/**
+	* Loads all migrations and their application state from the database.
+	*
+	* @return null
+	*/
+	public function load_migration_state()
+	{
+		$this->migration_state = array();
+
+		$sql = "SELECT *
+			FROM " . $this->migrations_table;
+		$result = $this->db->sql_query($sql);
+
+		while ($migration = $this->db->sql_fetchrow($result))
+		{
+			$this->migration_state[$migration['migration_name']] = $migration;
+
+			$this->migration_state[$migration['migration_name']]['migration_depends_on'] = unserialize($migration['migration_depends_on']);
+		}
+
+		$this->db->sql_freeresult($result);
+	}
+
+	/**
+	* Sets the list of available migration class names to the given array.
+	*
+	* @param array $class_names An array of migration class names
+	* @return null
+	*/
+	public function set_migrations($class_names)
+	{
+		$this->migrations = $class_names;
+	}
+
+	/**
+	* This function adds all migrations in a specified directory to the migrations table
+	*
+	* THIS SHOULD NOT GENERALLY BE USED! THIS IS FOR THE PHPBB INSTALLER.
+	* THIS WILL THROW ERRORS IF MIGRATIONS ALREADY EXIST IN THE TABLE, DO NOT CALL MORE THAN ONCE!
+	*
+	* @param string $path Path to migration data files
+	* @param bool $recursive Set to true to also load data files from subdirectories
+	* @return null
+	*/
+	public function populate_migrations_from_directory($path, $recursive = true)
+	{
+		$existing_migrations = $this->migrations;
+
+		$this->migrations = array();
+		$this->load_migrations($path, true, $recursive);
+
+		foreach ($this->migrations as $name)
+		{
+			if ($this->migration_state($name) === false)
+			{
+				$state = array(
+					'migration_depends_on'	=> $name::depends_on(),
+					'migration_schema_done' => true,
+					'migration_data_done'	=> true,
+					'migration_data_state'	=> '',
+					'migration_start_time'	=> time(),
+					'migration_end_time'	=> time(),
+				);
+				$this->insert_migration($name, $state);
+			}
+		}
+
+		$this->migrations = $existing_migrations;
+	}
+
+	/**
+	* Load migration data files from a directory
+	*
+	* Migration data files loaded with this function MUST contain
+	* 	ONLY ONE class in them (or an exception will be thrown).
+	*
+	* @param string $path Path to migration data files
+	* @param bool $check_fulfillable If TRUE (default), we will check
+	* 	if all of the migrations are fulfillable after loading them.
+	* 	If FALSE, we will not check. You SHOULD check at least once
+	* 	to prevent errors (if including multiple directories, check
+	* 	with the last call to prevent throwing errors unnecessarily).
+	* @param bool $recursive Set to true to also load data files from subdirectories
+	* @return array Array of migration names
+	*/
+	public function load_migrations($path, $check_fulfillable = true, $recursive = true)
+	{
+		if (!is_dir($path))
+		{
+			throw new phpbb_db_migration_exception('DIRECTORY INVALID', $path);
+		}
+
+		$handle = opendir($path);
+		while (($file = readdir($handle)) !== false)
+		{
+			if ($file == '.' || $file == '..')
+			{
+				continue;
+			}
+
+			// Recursion through subdirectories
+			if (is_dir($path . $file) && $recursive)
+			{
+				$this->load_migrations($path . $file . '/', $check_fulfillable, $recursive);
+			}
+
+			if (strpos($file, '_') !== 0 && strrpos($file, '.' . $this->php_ext) === (strlen($file) - strlen($this->php_ext) - 1))
+			{
+				// We try to find what class existed by comparing the classes declared before and after including the file.
+				$declared_classes = get_declared_classes();
+
+				include ($path . $file);
+
+				$added_classes = array_diff(get_declared_classes(), $declared_classes);
+
+				if (
+					// If two classes have been added and phpbb_db_migration is one of them, we've only added one real migration
+					!(sizeof($added_classes) == 2 && in_array('phpbb_db_migration', $added_classes)) &&
+					// Otherwise there should only be one class added
+					sizeof($added_classes) != 1
+				)
+				{
+					throw new phpbb_db_migration_exception('MIGRATION DATA FILE INVALID', $path . $file);
+				}
+
+				$name = array_pop($added_classes);
+
+				if (!in_array($name, $this->migrations))
+				{
+					$this->migrations[] = $name;
+				}
+			}
+		}
+
+		if ($check_fulfillable)
+		{
+			foreach ($this->migrations as $name)
+			{
+				$unfulfillable = $this->unfulfillable($name);
+				if ($unfulfillable !== false)
+				{
+					throw new phpbb_db_migration_exception('MIGRATION_NOT_FULFILLABLE', $name, $unfulfillable);
+				}
+			}
+		}
+
+		return $this->migrations;
+	}
+
+	/**
+	* Runs a single update step from the next migration to be applied.
+	*
+	* The update step can either be a schema or a (partial) data update. To
+	* check if update() needs to be called again use the finished() method.
+	*
+	* @return null
+	*/
+	public function update()
+	{
+		foreach ($this->migrations as $name)
+		{
+			if (!isset($this->migration_state[$name]) ||
+				!$this->migration_state[$name]['migration_schema_done'] ||
+				!$this->migration_state[$name]['migration_data_done'])
+			{
+				if (!$this->try_apply($name))
+				{
+					continue;
+				}
+				else
+				{
+					return;
+				}
+			}
+		}
+	}
+
+	/**
+	* Attempts to apply a step of the given migration or one of its dependencies
+	*
+	* @param	string	The class name of the migration
+	* @return	bool	Whether any update step was successfully run
+	*/
+	protected function try_apply($name)
+	{
+		if (!class_exists($name))
+		{
+			return false;
+		}
+
+		$migration = $this->get_migration($name);
+
+		$state = (isset($this->migration_state[$name])) ?
+			$this->migration_state[$name] :
+			array(
+				'migration_depends_on'	=> $migration->depends_on(),
+				'migration_schema_done' => false,
+				'migration_data_done'	=> false,
+				'migration_data_state'	=> '',
+				'migration_start_time'	=> 0,
+				'migration_end_time'	=> 0,
+			);
+
+		foreach ($state['migration_depends_on'] as $depend)
+		{
+			if (!isset($this->migration_state[$depend]) ||
+				!$this->migration_state[$depend]['migration_schema_done'] ||
+				!$this->migration_state[$depend]['migration_data_done'])
+			{
+				return $this->try_apply($depend);
+			}
+		}
+
+		$this->last_run_migration = array(
+			'name'	=> $name,
+			'class'	=> $migration,
+		);
+
+		if ($migration->effectively_installed())
+		{
+			$state = array(
+				'migration_depends_on'	=> $migration->depends_on(),
+				'migration_schema_done' => true,
+				'migration_data_done'	=> true,
+				'migration_data_state'	=> '',
+				'migration_start_time'	=> 0,
+				'migration_end_time'	=> 0,
+			);
+		}
+		else
+		{
+			if (!isset($this->migration_state[$name]))
+			{
+				$state['migration_start_time'] = time();
+				$this->insert_migration($name, $state);
+			}
+		}
+
+		if (!$state['migration_schema_done'])
+		{
+			$this->apply_schema_changes($migration->update_schema());
+			$state['migration_schema_done'] = true;
+		}
+		else if (!$state['migration_data_done'])
+		{
+			try
+			{
+				$result = $this->process_data_step($migration->update_data(), $state['migration_data_state']);
+
+				$state['migration_data_state'] = ($result === true) ? '' : $result;
+				$state['migration_data_done'] = ($result === true);
+				$state['migration_end_time'] = ($result === true) ? time() : 0;
+			}
+			catch (phpbb_db_migration_exception $e)
+			{
+				// Revert the schema changes
+				$this->revert($name);
+
+				// Rethrow exception
+				throw $e;
+			}
+		}
+
+		$insert = $state;
+		$insert['migration_depends_on'] = serialize($state['migration_depends_on']);
+		$sql = 'UPDATE ' . $this->migrations_table . '
+			SET ' . $this->db->sql_build_array('UPDATE', $insert) . "
+			WHERE migration_name = '" . $this->db->sql_escape($name) . "'";
+		$this->db->sql_query($sql);
+
+		$this->migration_state[$name] = $state;
+
+		return true;
+	}
+
+	/**
+	* Runs a single revert step from the last migration installed
+	*
+	* YOU MUST ADD/SET ALL MIGRATIONS THAT COULD BE DEPENDENT ON THE MIGRATION TO REVERT TO BEFORE CALLING THIS METHOD!
+	* The revert step can either be a schema or a (partial) data revert. To
+	* check if revert() needs to be called again use the migration_state() method.
+	*
+	* @param string $migration String migration name to revert (including any that depend on this migration)
+	* @return null
+	*/
+	public function revert($migration)
+	{
+		if (!isset($this->migration_state[$migration]))
+		{
+			// Not installed
+			return;
+		}
+
+		foreach ($this->migration_state as $name => $state)
+		{
+			if (!empty($state['migration_depends_on']) && in_array($migration, $state['migration_depends_on']))
+			{
+				$this->revert($name);
+			}
+		}
+
+		$this->try_revert($migration);
+	}
+
+	/**
+	* Attempts to revert a step of the given migration or one of its dependencies
+	*
+	* @param	string	The class name of the migration
+	* @return	bool	Whether any update step was successfully run
+	*/
+	protected function try_revert($name)
+	{
+		if (!class_exists($name))
+		{
+			return false;
+		}
+
+		$migration = $this->get_migration($name);
+
+		$state = $this->migration_state[$name];
+
+		$this->last_run_migration = array(
+			'name'	=> $name,
+			'class'	=> $migration,
+		);
+
+		if ($state['migration_data_done'])
+		{
+			if ($state['migration_data_state'] !== 'revert_data')
+			{
+				$result = $this->process_data_step($migration->update_data(), $state['migration_data_state'], true);
+
+				$state['migration_data_state'] = ($result === true) ? 'revert_data' : $result;
+			}
+			else
+			{
+				$result = $this->process_data_step($migration->revert_data(), $state['migration_data_state'], false);
+
+				$state['migration_data_state'] = ($result === true) ? '' : $result;
+				$state['migration_data_done'] = ($result === true) ? false : true;
+			}
+
+			$insert = $state;
+			$insert['migration_depends_on'] = serialize($state['migration_depends_on']);
+			$sql = 'UPDATE ' . $this->migrations_table . '
+				SET ' . $this->db->sql_build_array('UPDATE', $insert) . "
+				WHERE migration_name = '" . $this->db->sql_escape($name) . "'";
+			$this->db->sql_query($sql);
+
+			$this->migration_state[$name] = $state;
+		}
+		else
+		{
+			$this->apply_schema_changes($migration->revert_schema());
+
+			$sql = 'DELETE FROM ' . $this->migrations_table . "
+				WHERE migration_name = '" . $this->db->sql_escape($name) . "'";
+			$this->db->sql_query($sql);
+
+			unset($this->migration_state[$name]);
+		}
+
+		return true;
+	}
+
+	/**
+	* Apply schema changes from a migration
+	*
+	* Just calls db_tools->perform_schema_changes
+	*
+	* @param array $schema_changes from migration
+	*/
+	protected function apply_schema_changes($schema_changes)
+	{
+		$this->db_tools->perform_schema_changes($schema_changes);
+	}
+
+	/**
+	* Process the data step of the migration
+	*
+	* @param array $steps The steps to run
+	* @param bool|string $state Current state of the migration
+	* @param bool $revert true to revert a data step
+	* @return bool|string migration state. True if completed, serialized array if not finished
+	*/
+	protected function process_data_step($steps, $state, $revert = false)
+	{
+		$state = ($state) ? unserialize($state) : false;
+
+		foreach ($steps as $step_identifier => $step)
+		{
+			$last_result = false;
+			if ($state)
+			{
+				// Continue until we reach the step that matches the last step called
+				if ($state['step'] != $step_identifier)
+				{
+					continue;
+				}
+
+				// We send the result from last time to the callable function
+				$last_result = $state['result'];
+
+				// Set state to false since we reached the point we were at
+				$state = false;
+			}
+
+			try
+			{
+				// Result will be null or true if everything completed correctly
+				$result = $this->run_step($step, $last_result, $revert);
+				if ($result !== null && $result !== true)
+				{
+					return serialize(array(
+						'result'	=> $result,
+						'step'		=> $step_identifier,
+					));
+				}
+			}
+			catch (phpbb_db_migration_exception $e)
+			{
+				// We should try rolling back here
+				foreach ($steps as $reverse_step_identifier => $reverse_step)
+				{
+					// If we've reached the current step we can break because we reversed everything that was run
+					if ($reverse_step_identifier == $step_identifier)
+					{
+						break;
+					}
+
+					// Reverse the step that was run
+					$result = $this->run_step($reverse_step, false, !$revert);
+				}
+
+				// rethrow the exception
+				throw $e;
+			}
+		}
+
+		return true;
+	}
+
+	/**
+	* Run a single step
+	*
+	* An exception should be thrown if an error occurs
+	*
+	* @param mixed $step Data step from migration
+	* @param mixed $last_result Result to pass to the callable (only for 'custom' method)
+	* @param bool $reverse False to install, True to attempt uninstallation by reversing the call
+	* @return null
+	*/
+	protected function run_step($step, $last_result = false, $reverse = false)
+	{
+		$callable_and_parameters = $this->get_callable_from_step($step, $last_result, $reverse);
+
+		if ($callable_and_parameters === false)
+		{
+			return;
+		}
+
+		$callable = $callable_and_parameters[0];
+		$parameters = $callable_and_parameters[1];
+
+		return call_user_func_array($callable, $parameters);
+	}
+
+	/**
+	* Get a callable statement from a data step
+	*
+	* @param array $step Data step from migration
+	* @param mixed $last_result Result to pass to the callable (only for 'custom' method)
+	* @param bool $reverse False to install, True to attempt uninstallation by reversing the call
+	* @return array Array with parameters for call_user_func_array(), 0 is the callable, 1 is parameters
+	*/
+	protected function get_callable_from_step(array $step, $last_result = false, $reverse = false)
+	{
+		$type = $step[0];
+		$parameters = $step[1];
+
+		$parts = explode('.', $type);
+
+		$class = $parts[0];
+		$method = false;
+
+		if (isset($parts[1]))
+		{
+			$method = $parts[1];
+		}
+
+		switch ($class)
+		{
+			case 'if':
+				if (!isset($parameters[0]))
+				{
+					throw new phpbb_db_migration_exception('MIGRATION_INVALID_DATA_MISSING_CONDITION', $step);
+				}
+
+				if (!isset($parameters[1]))
+				{
+					throw new phpbb_db_migration_exception('MIGRATION_INVALID_DATA_MISSING_STEP', $step);
+				}
+
+				$condition = $parameters[0];
+
+				if (!$condition)
+				{
+					return false;
+				}
+
+				$step = $parameters[1];
+
+				return $this->get_callable_from_step($step);
+			break;
+			case 'custom':
+				if (!is_callable($parameters[0]))
+				{
+					throw new phpbb_db_migration_exception('MIGRATION_INVALID_DATA_CUSTOM_NOT_CALLABLE', $step);
+				}
+
+				return array(
+					$parameters[0],
+					array($last_result),
+				);
+			break;
+
+			default:
+				if (!$method)
+				{
+					throw new phpbb_db_migration_exception('MIGRATION_INVALID_DATA_UNKNOWN_TYPE', $step);
+				}
+
+				if (!isset($this->tools[$class]))
+				{
+					throw new phpbb_db_migration_exception('MIGRATION_INVALID_DATA_UNDEFINED_TOOL', $step);
+				}
+
+				if (!method_exists(get_class($this->tools[$class]), $method))
+				{
+					throw new phpbb_db_migration_exception('MIGRATION_INVALID_DATA_UNDEFINED_METHOD', $step);
+				}
+
+				// Attempt to reverse operations
+				if ($reverse)
+				{
+					array_unshift($parameters, $method);
+
+					return array(
+						array($this->tools[$class], 'reverse'),
+						$parameters,
+					);
+				}
+
+				return array(
+					array($this->tools[$class], $method),
+					$parameters,
+				);
+			break;
+		}
+	}
+
+	/**
+	* Insert migration row into the database
+	*
+	* @param string $name Name of the migration
+	* @param array $state
+	* @return null
+	*/
+	protected function insert_migration($name, $state)
+	{
+		$migration_row = $state;
+		$migration_row['migration_name'] = $name;
+		$migration_row['migration_depends_on'] = serialize($state['migration_depends_on']);
+
+		$sql = 'INSERT INTO ' . $this->migrations_table . '
+			' . $this->db->sql_build_array('INSERT', $migration_row);
+		$this->db->sql_query($sql);
+
+		$this->migration_state[$name] = $state;
+	}
+
+	/**
+	* Checks if a migration's dependencies can even theoretically be satisfied.
+	*
+	* @param string	$name The class name of the migration
+	* @return bool|string False if fulfillable, string of missing migration name if unfulfillable
+	*/
+	public function unfulfillable($name)
+	{
+		if (isset($this->migration_state[$name]))
+		{
+			return false;
+		}
+
+		if (!class_exists($name))
+		{
+			return $name;
+		}
+
+		$migration = $this->get_migration($name);
+		$depends = $migration->depends_on();
+
+		foreach ($depends as $depend)
+		{
+			$unfulfillable = $this->unfulfillable($depend);
+			if ($unfulfillable !== false)
+			{
+				return $unfulfillable;
+			}
+		}
+
+		return false;
+	}
+
+	/**
+	* Checks whether all available, fulfillable migrations have been applied.
+	*
+	* @return bool Whether the migrations have been applied
+	*/
+	public function finished()
+	{
+		foreach ($this->migrations as $name)
+		{
+			if (!isset($this->migration_state[$name]))
+			{
+				// skip unfulfillable migrations, but fulfillables mean we
+				// are not finished yet
+				if ($this->unfulfillable($name) !== false)
+				{
+					continue;
+				}
+				return false;
+			}
+
+			$migration = $this->migration_state[$name];
+
+			if (!$migration['migration_schema_done'] || !$migration['migration_data_done'])
+			{
+				return false;
+			}
+		}
+
+		return true;
+	}
+
+	/**
+	* Gets a migration state (whether it is installed and to what extent)
+	*
+	* @param string $migration String migration name to check if it is installed
+	* @return bool|array False if the migration has not at all been installed, array
+	*/
+	public function migration_state($migration)
+	{
+		if (!isset($this->migration_state[$migration]))
+		{
+			return false;
+		}
+
+		return $this->migration_state[$migration];
+	}
+
+	/**
+	* Helper to get a migration
+	*
+	* @param string $name Name of the migration
+	* @return phpbb_db_migration
+	*/
+	protected function get_migration($name)
+	{
+		return new $name($this->config, $this->db, $this->db_tools, $this->phpbb_root_path, $this->php_ext, $this->table_prefix);
+	}
+}
diff --git a/phpBB/includes/di/extension/config.php b/phpBB/includes/di/extension/config.php
index fb5ca90070..6c272a6588 100644
--- a/phpBB/includes/di/extension/config.php
+++ b/phpBB/includes/di/extension/config.php
@@ -42,9 +42,10 @@ class phpbb_di_extension_config extends Extension
 	{
 		require($this->config_file);
 
+		$container->setParameter('core.adm_relative_path', (isset($phpbb_adm_relative_path) ? $phpbb_adm_relative_path : 'adm/'));
 		$container->setParameter('core.table_prefix', $table_prefix);
-		$container->setParameter('cache.driver.class', $this->fix_acm_type($acm_type));
-		$container->setParameter('dbal.driver.class', 'dbal_'.$dbms);
+		$container->setParameter('cache.driver.class', $this->convert_30_acm_type($acm_type));
+		$container->setParameter('dbal.driver.class', phpbb_convert_30_dbms_to_31($dbms));
 		$container->setParameter('dbal.dbhost', $dbhost);
 		$container->setParameter('dbal.dbuser', $dbuser);
 		$container->setParameter('dbal.dbpasswd', $dbpasswd);
@@ -66,12 +67,12 @@ class phpbb_di_extension_config extends Extension
 	}
 
 	/**
-	* Convert old (3.0) values to 3.1 class names
+	* Convert 3.0 ACM type to 3.1 cache driver class name
 	*
-	* @param style $acm_type ACM type
-	* @return ACM type class
+	* @param string $acm_type ACM type
+	* @return cache driver class
 	*/
-	protected function fix_acm_type($acm_type)
+	protected function convert_30_acm_type($acm_type)
 	{
 		if (preg_match('#^[a-z]+$#', $acm_type))
 		{
diff --git a/phpBB/includes/di/service_collection.php b/phpBB/includes/di/service_collection.php
index 60323c8dba..880cb46d4d 100644
--- a/phpBB/includes/di/service_collection.php
+++ b/phpBB/includes/di/service_collection.php
@@ -43,7 +43,7 @@ class phpbb_di_service_collection extends ArrayObject
 	public function add($name)
 	{
 		$task = $this->container->get($name);
-		$task->set_name($name);
+
 		$this->offsetSet($name, $task);
 	}
 }
diff --git a/phpBB/includes/extension/base.php b/phpBB/includes/extension/base.php
index 9d076eb6c5..d51589d719 100644
--- a/phpBB/includes/extension/base.php
+++ b/phpBB/includes/extension/base.php
@@ -15,6 +15,8 @@ if (!defined('IN_PHPBB'))
 	exit;
 }
 
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
 /**
 * A base class for extensions without custom enable/disable/purge code.
 *
@@ -22,6 +24,19 @@ if (!defined('IN_PHPBB'))
 */
 class phpbb_extension_base implements phpbb_extension_interface
 {
+	/** @var ContainerInterface */
+	protected $container;
+
+	/**
+	* Constructor
+	*
+	* @param ContainerInterface $container Container object
+	*/
+	public function __construct(ContainerInterface $container)
+	{
+		$this->container = $container;
+	}
+
 	/**
 	* Single enable step that does nothing
 	*
diff --git a/phpBB/includes/extension/interface.php b/phpBB/includes/extension/interface.php
index 74ecb9b762..7b36a12bf6 100644
--- a/phpBB/includes/extension/interface.php
+++ b/phpBB/includes/extension/interface.php
@@ -45,7 +45,9 @@ interface phpbb_extension_interface
 	*
 	* @param	mixed	$old_state	The return value of the previous call
 	*								of this method, or false on the first call
-	* @return null
+	* @return	mixed				Returns false after last step, otherwise
+	*								temporary state which is passed as an
+	*								argument to the next step
 	*/
 	public function disable_step($old_state);
 
diff --git a/phpBB/includes/extension/manager.php b/phpBB/includes/extension/manager.php
index bfd4edde93..21a9ec1370 100644
--- a/phpBB/includes/extension/manager.php
+++ b/phpBB/includes/extension/manager.php
@@ -15,6 +15,8 @@ if (!defined('IN_PHPBB'))
 	exit;
 }
 
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
 /**
 * The extension manager provides means to activate/deactivate extensions.
 *
@@ -22,8 +24,12 @@ if (!defined('IN_PHPBB'))
 */
 class phpbb_extension_manager
 {
+	/** @var ContainerInterface */
+	protected $container;
+
 	protected $db;
 	protected $config;
+	protected $migrator;
 	protected $cache;
 	protected $php_ext;
 	protected $extensions;
@@ -34,7 +40,8 @@ class phpbb_extension_manager
 	/**
 	* Creates a manager and loads information from database
 	*
-	* @param dbal $db A database connection
+	* @param ContainerInterface $container A container
+	* @param phpbb_db_driver $db A database connection
 	* @param phpbb_config $config phpbb_config
 	* @param string $extension_table The name of the table holding extensions
 	* @param string $phpbb_root_path Path to the phpbb includes directory.
@@ -42,11 +49,13 @@ class phpbb_extension_manager
 	* @param phpbb_cache_driver_interface $cache A cache instance or null
 	* @param string $cache_name The name of the cache variable, defaults to _ext
 	*/
-	public function __construct(dbal $db, phpbb_config $config, $extension_table, $phpbb_root_path, $php_ext = '.php', phpbb_cache_driver_interface $cache = null, $cache_name = '_ext')
+	public function __construct(ContainerInterface $container, phpbb_db_driver $db, phpbb_config $config, phpbb_db_migrator $migrator, $extension_table, $phpbb_root_path, $php_ext = '.php', phpbb_cache_driver_interface $cache = null, $cache_name = '_ext')
 	{
+		$this->container = $container;
 		$this->phpbb_root_path = $phpbb_root_path;
 		$this->db = $db;
 		$this->config = $config;
+		$this->migrator = $migrator;
 		$this->cache = $cache;
 		$this->php_ext = $php_ext;
 		$this->extension_table = $extension_table;
@@ -126,11 +135,11 @@ class phpbb_extension_manager
 
 		if (class_exists($extension_class_name))
 		{
-			return new $extension_class_name;
+			return new $extension_class_name($this->container);
 		}
 		else
 		{
-			return new phpbb_extension_base;
+			return new phpbb_extension_base($this->container);
 		}
 	}
 
@@ -166,6 +175,12 @@ class phpbb_extension_manager
 
 		$old_state = (isset($this->extensions[$name]['ext_state'])) ? unserialize($this->extensions[$name]['ext_state']) : false;
 
+		// Returns false if not completed
+		if (!$this->handle_migrations($name, 'enable'))
+		{
+			return true;
+		}
+
 		$extension = $this->get_extension($name);
 		$state = $extension->enable_step($old_state);
 
@@ -317,6 +332,12 @@ class phpbb_extension_manager
 
 		$old_state = unserialize($this->extensions[$name]['ext_state']);
 
+		// Returns false if not completed
+		if (!$this->handle_migrations($name, 'purge'))
+		{
+			return true;
+		}
+
 		$extension = $this->get_extension($name);
 		$state = $extension->purge_step($old_state);
 
@@ -384,7 +405,7 @@ class phpbb_extension_manager
 		}
 
 		$iterator = new RecursiveIteratorIterator(
-			new RecursiveDirectoryIterator($this->phpbb_root_path . 'ext/'),
+			new RecursiveDirectoryIterator($this->phpbb_root_path . 'ext/', FilesystemIterator::NEW_CURRENT_AND_KEY | FilesystemIterator::FOLLOW_SYMLINKS),
 			RecursiveIteratorIterator::SELF_FIRST);
 		foreach ($iterator as $file_info)
 		{
@@ -490,4 +511,58 @@ class phpbb_extension_manager
 	{
 		return new phpbb_extension_finder($this, $this->phpbb_root_path, $this->cache, $this->php_ext, $this->cache_name . '_finder');
 	}
+
+	/**
+	* Handle installing/reverting migrations
+	*
+	* @param string $extension_name Name of the extension
+	* @param string $mode enable or purge
+	* @return bool True if completed, False if not completed
+	*/
+	protected function handle_migrations($extension_name, $mode)
+	{
+		$migrations_path = $this->phpbb_root_path . $this->get_extension_path($extension_name) . 'migrations/';
+		if (!file_exists($migrations_path) || !is_dir($migrations_path))
+		{
+			return true;
+		}
+
+		$migrations = $this->migrator->load_migrations($migrations_path);
+
+		// What is a safe limit of execution time? Half the max execution time should be safe.
+		$safe_time_limit = (ini_get('max_execution_time') / 2);
+		$start_time = time();
+
+		if ($mode == 'enable')
+		{
+			while (!$this->migrator->finished())
+			{
+				$this->migrator->update();
+
+				// Are we approaching the time limit? If so we want to pause the update and continue after refreshing
+				if ((time() - $start_time) >= $safe_time_limit)
+				{
+					return false;
+				}
+			}
+		}
+		else if ($mode == 'purge')
+		{
+			foreach ($migrations as $migration)
+			{
+				while ($this->migrator->migration_state($migration) !== false)
+				{
+					$this->migrator->revert($migration);
+
+					// Are we approaching the time limit? If so we want to pause the update and continue after refreshing
+					if ((time() - $start_time) >= $safe_time_limit)
+					{
+						return false;
+					}
+				}
+			}
+		}
+
+		return true;
+	}
 }
diff --git a/phpBB/includes/extension/metadata_manager.php b/phpBB/includes/extension/metadata_manager.php
index ea85bd3c4e..36b0f8b184 100644
--- a/phpBB/includes/extension/metadata_manager.php
+++ b/phpBB/includes/extension/metadata_manager.php
@@ -34,12 +34,12 @@ class phpbb_extension_metadata_manager
 	/**
 	* Creates the metadata manager
 	*
-	* @param dbal $db A database connection
+	* @param phpbb_db_driver $db A database connection
 	* @param string $extension_manager An instance of the phpbb extension manager
 	* @param string $phpbb_root_path Path to the phpbb includes directory.
 	* @param string $phpEx php file extension
 	*/
-	public function __construct($ext_name, dbal $db, phpbb_extension_manager $extension_manager, $phpbb_root_path, $phpEx = '.php', phpbb_template $template, phpbb_config $config)
+	public function __construct($ext_name, phpbb_db_driver $db, phpbb_extension_manager $extension_manager, $phpbb_root_path, $phpEx = '.php', phpbb_template $template, phpbb_config $config)
 	{
 		$this->phpbb_root_path = $phpbb_root_path;
 		$this->db = $db;
diff --git a/phpBB/includes/functions.php b/phpBB/includes/functions.php
index ebe9a9918d..d9af268f80 100644
--- a/phpBB/includes/functions.php
+++ b/phpBB/includes/functions.php
@@ -97,7 +97,18 @@ function request_var($var_name, $default, $multibyte = false, $cookie = false, $
 }
 
 /**
-* Set config value. Creates missing config entry.
+* Sets a configuration option's value.
+*
+* Please note that this function does not update the is_dynamic value for
+* an already existing config option.
+*
+* @param string $config_name   The configuration option's name
+* @param string $config_value  New configuration value
+* @param bool   $is_dynamic    Whether this variable should be cached (false) or
+*                              if it changes too frequently (true) to be
+*                              efficiently cached.
+*
+* @return null
 *
 * @deprecated
 */
@@ -119,7 +130,15 @@ function set_config($config_name, $config_value, $is_dynamic = false, phpbb_conf
 }
 
 /**
-* Set dynamic config value with arithmetic operation.
+* Increments an integer config value directly in the database.
+*
+* @param string $config_name   The configuration option's name
+* @param int    $increment     Amount to increment by
+* @param bool   $is_dynamic    Whether this variable should be cached (false) or
+*                              if it changes too frequently (true) to be
+*                              efficiently cached.
+*
+* @return null
 *
 * @deprecated
 */
@@ -4894,12 +4913,107 @@ function phpbb_http_login($param)
 }
 
 /**
+* Escapes and quotes a string for use as an HTML/XML attribute value.
+*
+* This is a port of Python xml.sax.saxutils quoteattr.
+*
+* The function will attempt to choose a quote character in such a way as to
+* avoid escaping quotes in the string. If this is not possible the string will
+* be wrapped in double quotes and double quotes will be escaped.
+*
+* @param string $data The string to be escaped
+* @param array $entities Associative array of additional entities to be escaped
+* @return string Escaped and quoted string
+*/
+function phpbb_quoteattr($data, $entities = null)
+{
+	$data = str_replace('&', '&amp;', $data);
+	$data = str_replace('>', '&gt;', $data);
+	$data = str_replace('<', '&lt;', $data);
+
+	$data = str_replace("\n", '&#10;', $data);
+	$data = str_replace("\r", '&#13;', $data);
+	$data = str_replace("\t", '&#9;', $data);
+
+	if (!empty($entities))
+	{
+		$data = str_replace(array_keys($entities), array_values($entities), $data);
+	}
+
+	if (strpos($data, '"') !== false)
+	{
+		if (strpos($data, "'") !== false)
+		{
+			$data = '"' . str_replace('"', '&quot;', $data) . '"';
+		}
+		else
+		{
+			$data = "'" . $data . "'";
+		}
+	}
+	else
+	{
+		$data = '"' . $data . '"';
+	}
+
+	return $data;
+}
+
+/**
+* Converts query string (GET) parameters in request into hidden fields.
+*
+* Useful for forwarding GET parameters when submitting forms with GET method.
+*
+* It is possible to omit some of the GET parameters, which is useful if
+* they are specified in the form being submitted.
+*
+* sid is always omitted.
+*
+* @param phpbb_request $request Request object
+* @param array $exclude A list of variable names that should not be forwarded
+* @return string HTML with hidden fields
+*/
+function phpbb_build_hidden_fields_for_query_params($request, $exclude = null)
+{
+	$names = $request->variable_names(phpbb_request_interface::GET);
+	$hidden = '';
+	foreach ($names as $name)
+	{
+		// Sessions are dealt with elsewhere, omit sid always
+		if ($name == 'sid')
+		{
+			continue;
+		}
+
+		// Omit any additional parameters requested
+		if (!empty($exclude) && in_array($name, $exclude))
+		{
+			continue;
+		}
+
+		$escaped_name = phpbb_quoteattr($name);
+
+		// Note: we might retrieve the variable from POST or cookies
+		// here. To avoid exposing cookies, skip variables that are
+		// overwritten somewhere other than GET entirely.
+		$value = $request->variable($name, '', true);
+		$get_value = $request->variable($name, '', true, phpbb_request_interface::GET);
+		if ($value === $get_value)
+		{
+			$escaped_value = phpbb_quoteattr($value);
+			$hidden .= "<input type='hidden' name=$escaped_name value=$escaped_value />";
+		}
+	}
+	return $hidden;
+}
+
+/**
 * Generate page header
 */
 function page_header($page_title = '', $display_online_list = true, $item_id = 0, $item = 'forum')
 {
 	global $db, $config, $template, $SID, $_SID, $_EXTRA_URL, $user, $auth, $phpEx, $phpbb_root_path;
-	global $phpbb_dispatcher;
+	global $phpbb_dispatcher, $request;
 
 	if (defined('HEADER_INC'))
 	{
@@ -5088,6 +5202,8 @@ function page_header($page_title = '', $display_online_list = true, $item_id = 0
 		$timezone_name = $user->lang['timezones'][$timezone_name];
 	}
 
+	$hidden_fields_for_jumpbox = phpbb_build_hidden_fields_for_query_params($request, array('f'));
+
 	// The following assigns all _common_ variables that may be used at any point in a template.
 	$template->assign_vars(array(
 		'SITENAME'						=> $config['sitename'],
@@ -5102,6 +5218,7 @@ function page_header($page_title = '', $display_online_list = true, $item_id = 0
 		'RECORD_USERS'					=> $l_online_record,
 		'PRIVATE_MESSAGE_INFO'			=> $l_privmsgs_text,
 		'PRIVATE_MESSAGE_INFO_UNREAD'	=> $l_privmsgs_text_unread,
+		'HIDDEN_FIELDS_FOR_JUMPBOX'	=> $hidden_fields_for_jumpbox,
 
 		'S_USER_NEW_PRIVMSG'			=> $user->data['user_new_privmsg'],
 		'S_USER_UNREAD_PRIVMSG'			=> $user->data['user_unread_privmsg'],
@@ -5241,7 +5358,7 @@ function page_header($page_title = '', $display_online_list = true, $item_id = 0
 function page_footer($run_cron = true, $display_template = true, $exit_handler = true)
 {
 	global $db, $config, $template, $user, $auth, $cache, $starttime, $phpbb_root_path, $phpEx;
-	global $request, $phpbb_dispatcher;
+	global $request, $phpbb_dispatcher, $phpbb_admin_path;
 
 	// A listener can set this variable to `true` when it overrides this function
 	$page_footer_override = false;
@@ -5297,7 +5414,7 @@ function page_footer($run_cron = true, $display_template = true, $exit_handler =
 		'TRANSLATION_INFO'		=> (!empty($user->lang['TRANSLATION_INFO'])) ? $user->lang['TRANSLATION_INFO'] : '',
 		'CREDIT_LINE'			=> $user->lang('POWERED_BY', '<a href="https://www.phpbb.com/">phpBB</a>&reg; Forum Software &copy; phpBB Group'),
 
-		'U_ACP' => ($auth->acl_get('a_') && !empty($user->data['is_registered'])) ? append_sid("{$phpbb_root_path}adm/index.$phpEx", false, true, $user->session_id) : '')
+		'U_ACP' => ($auth->acl_get('a_') && !empty($user->data['is_registered'])) ? append_sid("{$phpbb_admin_path}index.$phpEx", false, true, $user->session_id) : '')
 	);
 
 	// Call cron-type script
@@ -5452,6 +5569,52 @@ function phpbb_to_numeric($input)
 }
 
 /**
+* Convert either 3.0 dbms or 3.1 db driver class name to 3.1 db driver class name.
+*
+* If $dbms is a valid 3.1 db driver class name, returns it unchanged.
+* Otherwise prepends phpbb_db_driver_ to the dbms to convert a 3.0 dbms
+* to 3.1 db driver class name.
+*
+* @param string $dbms dbms parameter
+* @return db driver class
+*/
+function phpbb_convert_30_dbms_to_31($dbms)
+{
+	// Note: this check is done first because mysqli extension
+	// supplies a mysqli class, and class_exists($dbms) would return
+	// true for mysqli class.
+	// However, per the docblock any valid 3.1 driver name should be
+	// recognized by this function, and have priority over 3.0 dbms.
+	if (class_exists('phpbb_db_driver_' . $dbms))
+	{
+		return 'phpbb_db_driver_' . $dbms;
+	}
+
+	if (class_exists($dbms))
+	{
+		// Additionally we could check that $dbms extends phpbb_db_driver.
+		// http://php.net/manual/en/class.reflectionclass.php
+		// Beware of possible performance issues:
+		// http://stackoverflow.com/questions/294582/php-5-reflection-api-performance
+		// We could check for interface implementation in all paths or
+		// only when we do not prepend phpbb_db_driver_.
+
+		/*
+		$reflection = new \ReflectionClass($dbms);
+
+		if ($reflection->isSubclassOf('phpbb_db_driver'))
+		{
+			return $dbms;
+		}
+		*/
+
+		return $dbms;
+	}
+
+	throw new \RuntimeException("You have specified an invalid dbms driver: $dbms");
+}
+
+/**
 * Create a Symfony Request object from phpbb_request object
 *
 * @param phpbb_request $request Request object
diff --git a/phpBB/includes/functions_acp.php b/phpBB/includes/functions_acp.php
index 2f3fd7bac0..d6bd9e35dd 100644
--- a/phpBB/includes/functions_acp.php
+++ b/phpBB/includes/functions_acp.php
@@ -82,16 +82,16 @@ function adm_page_header($page_title)
 		'T_RANKS_PATH'			=> "{$phpbb_root_path}{$config['ranks_path']}/",
 		'T_UPLOAD_PATH'			=> "{$phpbb_root_path}{$config['upload_path']}/",
 
-		'ICON_MOVE_UP'				=> '<img src="' . $phpbb_admin_path . 'images/icon_up.gif" alt="' . $user->lang['MOVE_UP'] . '" title="' . $user->lang['MOVE_UP'] . '" />',
-		'ICON_MOVE_UP_DISABLED'		=> '<img src="' . $phpbb_admin_path . 'images/icon_up_disabled.gif" alt="' . $user->lang['MOVE_UP'] . '" title="' . $user->lang['MOVE_UP'] . '" />',
-		'ICON_MOVE_DOWN'			=> '<img src="' . $phpbb_admin_path . 'images/icon_down.gif" alt="' . $user->lang['MOVE_DOWN'] . '" title="' . $user->lang['MOVE_DOWN'] . '" />',
-		'ICON_MOVE_DOWN_DISABLED'	=> '<img src="' . $phpbb_admin_path . 'images/icon_down_disabled.gif" alt="' . $user->lang['MOVE_DOWN'] . '" title="' . $user->lang['MOVE_DOWN'] . '" />',
-		'ICON_EDIT'					=> '<img src="' . $phpbb_admin_path . 'images/icon_edit.gif" alt="' . $user->lang['EDIT'] . '" title="' . $user->lang['EDIT'] . '" />',
-		'ICON_EDIT_DISABLED'		=> '<img src="' . $phpbb_admin_path . 'images/icon_edit_disabled.gif" alt="' . $user->lang['EDIT'] . '" title="' . $user->lang['EDIT'] . '" />',
-		'ICON_DELETE'				=> '<img src="' . $phpbb_admin_path . 'images/icon_delete.gif" alt="' . $user->lang['DELETE'] . '" title="' . $user->lang['DELETE'] . '" />',
-		'ICON_DELETE_DISABLED'		=> '<img src="' . $phpbb_admin_path . 'images/icon_delete_disabled.gif" alt="' . $user->lang['DELETE'] . '" title="' . $user->lang['DELETE'] . '" />',
-		'ICON_SYNC'					=> '<img src="' . $phpbb_admin_path . 'images/icon_sync.gif" alt="' . $user->lang['RESYNC'] . '" title="' . $user->lang['RESYNC'] . '" />',
-		'ICON_SYNC_DISABLED'		=> '<img src="' . $phpbb_admin_path . 'images/icon_sync_disabled.gif" alt="' . $user->lang['RESYNC'] . '" title="' . $user->lang['RESYNC'] . '" />',
+		'ICON_MOVE_UP'				=> '<img src="' . htmlspecialchars($phpbb_admin_path) . 'images/icon_up.gif" alt="' . $user->lang['MOVE_UP'] . '" title="' . $user->lang['MOVE_UP'] . '" />',
+		'ICON_MOVE_UP_DISABLED'		=> '<img src="' . htmlspecialchars($phpbb_admin_path) . 'images/icon_up_disabled.gif" alt="' . $user->lang['MOVE_UP'] . '" title="' . $user->lang['MOVE_UP'] . '" />',
+		'ICON_MOVE_DOWN'			=> '<img src="' . htmlspecialchars($phpbb_admin_path) . 'images/icon_down.gif" alt="' . $user->lang['MOVE_DOWN'] . '" title="' . $user->lang['MOVE_DOWN'] . '" />',
+		'ICON_MOVE_DOWN_DISABLED'	=> '<img src="' . htmlspecialchars($phpbb_admin_path) . 'images/icon_down_disabled.gif" alt="' . $user->lang['MOVE_DOWN'] . '" title="' . $user->lang['MOVE_DOWN'] . '" />',
+		'ICON_EDIT'					=> '<img src="' . htmlspecialchars($phpbb_admin_path) . 'images/icon_edit.gif" alt="' . $user->lang['EDIT'] . '" title="' . $user->lang['EDIT'] . '" />',
+		'ICON_EDIT_DISABLED'		=> '<img src="' . htmlspecialchars($phpbb_admin_path) . 'images/icon_edit_disabled.gif" alt="' . $user->lang['EDIT'] . '" title="' . $user->lang['EDIT'] . '" />',
+		'ICON_DELETE'				=> '<img src="' . htmlspecialchars($phpbb_admin_path) . 'images/icon_delete.gif" alt="' . $user->lang['DELETE'] . '" title="' . $user->lang['DELETE'] . '" />',
+		'ICON_DELETE_DISABLED'		=> '<img src="' . htmlspecialchars($phpbb_admin_path) . 'images/icon_delete_disabled.gif" alt="' . $user->lang['DELETE'] . '" title="' . $user->lang['DELETE'] . '" />',
+		'ICON_SYNC'					=> '<img src="' . htmlspecialchars($phpbb_admin_path) . 'images/icon_sync.gif" alt="' . $user->lang['RESYNC'] . '" title="' . $user->lang['RESYNC'] . '" />',
+		'ICON_SYNC_DISABLED'		=> '<img src="' . htmlspecialchars($phpbb_admin_path) . 'images/icon_sync_disabled.gif" alt="' . $user->lang['RESYNC'] . '" title="' . $user->lang['RESYNC'] . '" />',
 
 		'S_USER_LANG'			=> $user->lang['USER_LANG'],
 		'S_CONTENT_DIRECTION'	=> $user->lang['DIRECTION'],
@@ -443,6 +443,13 @@ function validate_config_vars($config_vars, &$cfg_array, &$error)
 				}
 			break;
 
+			case 'email':
+				if (!preg_match('/^' . get_preg_expression('email') . '$/i', $cfg_array[$config_name]))
+				{
+					$error[] = $user->lang['EMAIL_INVALID_EMAIL'];
+				}
+			break;
+
 			// Absolute path
 			case 'script_path':
 				if (!$cfg_array[$config_name])
diff --git a/phpBB/includes/functions_admin.php b/phpBB/includes/functions_admin.php
index 15930f9a2c..5529f2af46 100644
--- a/phpBB/includes/functions_admin.php
+++ b/phpBB/includes/functions_admin.php
@@ -2292,13 +2292,17 @@ function auto_prune($forum_id, $prune_mode, $prune_flags, $prune_days, $prune_fr
 }
 
 /**
-* Cache moderators, called whenever permissions are changed via admin_permissions. Changes of username
-* and group names must be carried through for the moderators table
+* Cache moderators. Called whenever permissions are changed
+* via admin_permissions. Changes of usernames and group names
+* must be carried through for the moderators table.
+*
+* @param phpbb_db_driver $db Database connection
+* @param phpbb_cache_driver_interface Cache driver
+* @param phpbb_auth $auth Authentication object
+* @return null
 */
-function cache_moderators()
+function phpbb_cache_moderators($db, $cache, $auth)
 {
-	global $db, $cache, $auth, $phpbb_root_path, $phpEx;
-
 	// Remove cached sql results
 	$cache->destroy('sql', MODERATOR_CACHE_TABLE);
 
@@ -2469,6 +2473,20 @@ function cache_moderators()
 }
 
 /**
+* Cache moderators. Called whenever permissions are changed
+* via admin_permissions. Changes of usernames and group names
+* must be carried through for the moderators table.
+*
+* @deprecated 3.1
+* @return null
+*/
+function cache_moderators()
+{
+	global $db, $cache, $auth;
+	return phpbb_cache_moderators($db, $cache, $auth);
+}
+
+/**
 * View log
 * If $log_count is set to false, we will skip counting all entries in the database.
 */
@@ -2740,12 +2758,16 @@ function view_log($mode, &$log, &$log_count, $limit = 0, $offset = 0, $forum_id
 }
 
 /**
-* Update foes - remove moderators and administrators from foe lists...
+* Removes moderators and administrators from foe lists.
+*
+* @param phpbb_db_driver $db Database connection
+* @param phpbb_auth $auth Authentication object
+* @param array|bool $group_id If an array, remove all members of this group from foe lists, or false to ignore
+* @param array|bool $user_id If an array, remove this user from foe lists, or false to ignore
+* @return null
 */
-function update_foes($group_id = false, $user_id = false)
+function phpbb_update_foes($db, $auth, $group_id = false, $user_id = false)
 {
-	global $db, $auth;
-
 	// update foes for some user
 	if (is_array($user_id) && sizeof($user_id))
 	{
@@ -2855,6 +2877,20 @@ function update_foes($group_id = false, $user_id = false)
 }
 
 /**
+* Removes moderators and administrators from foe lists.
+*
+* @deprecated 3.1
+* @param array|bool $group_id If an array, remove all members of this group from foe lists, or false to ignore
+* @param array|bool $user_id If an array, remove this user from foe lists, or false to ignore
+* @return null
+*/
+function update_foes($group_id = false, $user_id = false)
+{
+	global $db, $auth;
+	return phpbb_update_foes($db, $auth, $group_id, $user_id);
+}
+
+/**
 * Lists inactive users
 */
 function view_inactive_users(&$users, &$user_count, $limit = 0, $offset = 0, $limit_days = 0, $sort_by = 'user_inactive_time DESC')
diff --git a/phpBB/includes/functions_container.php b/phpBB/includes/functions_container.php
index 8014574443..a3ed21c35b 100644
--- a/phpBB/includes/functions_container.php
+++ b/phpBB/includes/functions_container.php
@@ -105,6 +105,15 @@ function phpbb_create_compiled_container(array $extensions, array $passes, $phpb
 	return $container;
 }
 
+/**
+* Create a compiled and dumped ContainerBuilder object
+*
+* @param array $extensions Array of Container extension objects
+* @param array $passes Array of Compiler Pass objects
+* @param string $phpbb_root_path Root path
+* @param string $php_ext PHP Extension
+* @return ContainerBuilder object (compiled)
+*/
 function phpbb_create_dumped_container(array $extensions, array $passes, $phpbb_root_path, $php_ext)
 {
 	// Check for our cached container; if it exists, use it
@@ -129,12 +138,60 @@ function phpbb_create_dumped_container(array $extensions, array $passes, $phpbb_
 	return $container;
 }
 
+/**
+* Create an environment-specific ContainerBuilder object
+*
+* If debug is enabled, the container is re-compiled every time.
+* This ensures that the latest changes will always be reflected
+* during development.
+*
+* Otherwise it will get the existing dumped container and use
+* that one instead.
+*
+* @param array $extensions Array of Container extension objects
+* @param array $passes Array of Compiler Pass objects
+* @param string $phpbb_root_path Root path
+* @param string $php_ext PHP Extension
+* @return ContainerBuilder object (compiled)
+*/
 function phpbb_create_dumped_container_unless_debug(array $extensions, array $passes, $phpbb_root_path, $php_ext)
 {
 	$container_factory = defined('DEBUG') ? 'phpbb_create_compiled_container' : 'phpbb_create_dumped_container';
 	return $container_factory($extensions, $passes, $phpbb_root_path, $php_ext);
 }
 
+/**
+* Create a default ContainerBuilder object
+*
+* Contains the default configuration of the phpBB container.
+*
+* @param array $extensions Array of Container extension objects
+* @param array $passes Array of Compiler Pass objects
+* @return ContainerBuilder object (compiled)
+*/
+function phpbb_create_default_container($phpbb_root_path, $php_ext)
+{
+	return phpbb_create_dumped_container_unless_debug(
+		array(
+			new phpbb_di_extension_config($phpbb_root_path . 'config.' . $php_ext),
+			new phpbb_di_extension_core($phpbb_root_path),
+		),
+		array(
+			new phpbb_di_pass_collection_pass(),
+			new phpbb_di_pass_kernel_pass(),
+		),
+		$phpbb_root_path,
+		$php_ext
+	);
+}
+
+/**
+* Get the filename under which the dumped container will be stored.
+*
+* @param string $phpbb_root_path Root path
+* @param string $php_ext PHP Extension
+* @return Path for dumped container
+*/
 function phpbb_container_filename($phpbb_root_path, $php_ext)
 {
 	$filename = str_replace(array('/', '.'), array('slash', 'dot'), $phpbb_root_path);
diff --git a/phpBB/includes/functions_database_helper.php b/phpBB/includes/functions_database_helper.php
new file mode 100644
index 0000000000..1b508e6a02
--- /dev/null
+++ b/phpBB/includes/functions_database_helper.php
@@ -0,0 +1,206 @@
+<?php
+/**
+*
+* @package phpBB3
+* @copyright (c) 2012 phpBB Group
+* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
+*
+*/
+
+/**
+* @ignore
+*/
+if (!defined('IN_PHPBB'))
+{
+	exit;
+}
+
+/**
+* Updates rows in given table from a set of values to a new value.
+* If this results in rows violating uniqueness constraints, the duplicate
+* rows are eliminated.
+*
+* The only supported table is bookmarks.
+*
+* @param phpbb_db_driver $db Database object
+* @param string $table Table on which to perform the update
+* @param string $column Column whose values to change
+* @param array $from_values An array of values that should be changed
+* @param int $to_value The new value
+* @return null
+*/
+function phpbb_update_rows_avoiding_duplicates(phpbb_db_driver $db, $table, $column, $from_values, $to_value)
+{
+	$sql = "SELECT $column, user_id
+		FROM $table
+		WHERE " . $db->sql_in_set($column, $from_values);
+	$result = $db->sql_query($sql);
+
+	$old_user_ids = array();
+	while ($row = $db->sql_fetchrow($result))
+	{
+		$old_user_ids[$row[$column]][] = (int) $row['user_id'];
+	}
+	$db->sql_freeresult($result);
+
+	$sql = "SELECT $column, user_id
+		FROM $table
+		WHERE $column = " . (int) $to_value;
+	$result = $db->sql_query($sql);
+
+	$new_user_ids = array();
+	while ($row = $db->sql_fetchrow($result))
+	{
+		$new_user_ids[$row[$column]][] = (int) $row['user_id'];
+	}
+	$db->sql_freeresult($result);
+
+	$queries = array();
+	foreach ($from_values as $from_value)
+	{
+		if (!isset($old_user_ids[$from_value]))
+		{
+			continue;
+		}
+		if (empty($new_user_ids))
+		{
+			$sql = "UPDATE $table
+				SET $column = " . (int) $to_value . "
+				WHERE $column = '" . $db->sql_escape($from_value) . "'";
+			$queries[] = $sql;
+		}
+		else
+		{
+			$different_user_ids = array_diff($old_user_ids[$from_value], $new_user_ids[$to_value]);
+			if (!empty($different_user_ids))
+			{
+				$sql = "UPDATE $table
+					SET $column = " . (int) $to_value . "
+					WHERE $column = '" . $db->sql_escape($from_value) . "'
+					AND " . $db->sql_in_set('user_id', $different_user_ids);
+				$queries[] = $sql;
+			}
+		}
+	}
+
+	if (!empty($queries))
+	{
+		$db->sql_transaction('begin');
+
+		foreach ($queries as $sql)
+		{
+			$db->sql_query($sql);
+		}
+
+		$sql = "DELETE FROM $table
+			WHERE " . $db->sql_in_set($column, $from_values);
+		$db->sql_query($sql);
+
+		$db->sql_transaction('commit');
+	}
+}
+
+/**
+* Updates rows in given table from a set of values to a new value.
+* If this results in rows violating uniqueness constraints, the duplicate
+* rows are merged respecting notify_status (0 takes precedence over 1).
+*
+* The only supported table is topics_watch.
+*
+* @param phpbb_db_driver $db Database object
+* @param string $table Table on which to perform the update
+* @param string $column Column whose values to change
+* @param array $from_values An array of values that should be changed
+* @param int $to_value The new value
+* @return null
+*/
+function phpbb_update_rows_avoiding_duplicates_notify_status(phpbb_db_driver $db, $table, $column, $from_values, $to_value)
+{
+	$sql = "SELECT $column, user_id, notify_status
+		FROM $table
+		WHERE " . $db->sql_in_set($column, $from_values);
+	$result = $db->sql_query($sql);
+
+	$old_user_ids = array();
+	while ($row = $db->sql_fetchrow($result))
+	{
+		$old_user_ids[(int) $row['notify_status']][$row[$column]][] = (int) $row['user_id'];
+	}
+	$db->sql_freeresult($result);
+
+	$sql = "SELECT $column, user_id
+		FROM $table
+		WHERE $column = " . (int) $to_value;
+	$result = $db->sql_query($sql);
+
+	$new_user_ids = array();
+	while ($row = $db->sql_fetchrow($result))
+	{
+		$new_user_ids[$row[$column]][] = (int) $row['user_id'];
+	}
+	$db->sql_freeresult($result);
+
+	$queries = array();
+	$extra_updates = array(
+		0 => 'notify_status = 0',
+		1 => '',
+	);
+	foreach ($from_values as $from_value)
+	{
+		foreach ($extra_updates as $notify_status => $extra_update)
+		{
+			if (!isset($old_user_ids[$notify_status][$from_value]))
+			{
+				continue;
+			}
+			if (empty($new_user_ids))
+			{
+				$sql = "UPDATE $table
+					SET $column = " . (int) $to_value . "
+					WHERE $column = '" . $db->sql_escape($from_value) . "'";
+				$queries[] = $sql;
+			}
+			else
+			{
+				$different_user_ids = array_diff($old_user_ids[$notify_status][$from_value], $new_user_ids[$to_value]);
+				if (!empty($different_user_ids))
+				{
+					$sql = "UPDATE $table
+						SET $column = " . (int) $to_value . "
+						WHERE $column = '" . $db->sql_escape($from_value) . "'
+						AND " . $db->sql_in_set('user_id', $different_user_ids);
+					$queries[] = $sql;
+				}
+
+				if ($extra_update)
+				{
+					$same_user_ids = array_diff($old_user_ids[$notify_status][$from_value], $different_user_ids);
+					if (!empty($same_user_ids))
+					{
+						$sql = "UPDATE $table
+							SET $extra_update
+							WHERE $column = '" . (int) $to_value . "'
+							AND " . $db->sql_in_set('user_id', $same_user_ids);
+						$queries[] = $sql;
+					}
+				}
+			}
+		}
+	}
+
+	if (!empty($queries))
+	{
+		$db->sql_transaction('begin');
+
+		foreach ($queries as $sql)
+		{
+			$db->sql_query($sql);
+		}
+
+		$sql = "DELETE FROM $table
+			WHERE " . $db->sql_in_set($column, $from_values);
+		$db->sql_query($sql);
+
+		$db->sql_transaction('commit');
+	}
+}
diff --git a/phpBB/includes/functions_display.php b/phpBB/includes/functions_display.php
index 73129803ee..cd4c901b58 100644
--- a/phpBB/includes/functions_display.php
+++ b/phpBB/includes/functions_display.php
@@ -61,6 +61,20 @@ function display_forums($root_data = '', $display_moderators = true, $return_mod
 		{
 			markread('all', false, false, request_var('mark_time', 0));
 
+			if ($request->is_ajax())
+			{
+				// Tell the ajax script what language vars and URL need to be replaced
+				$data = array(
+					'NO_UNREAD_POSTS'	=> $user->lang['NO_UNREAD_POSTS'],
+					'UNREAD_POSTS'		=> $user->lang['UNREAD_POSTS'],
+					'U_MARK_FORUMS'		=> ($user->data['is_registered'] || $config['load_anon_lastread']) ? append_sid("{$phpbb_root_path}index.$phpEx", 'hash=' . generate_link_hash('global') . '&mark=forums&mark_time=' . time()) : '',
+					'MESSAGE_TITLE'		=> $user->lang['INFORMATION'],
+					'MESSAGE_TEXT'		=> $user->lang['FORUMS_MARKED']
+				);
+				$json_response = new phpbb_json_response();
+				$json_response->send($data);
+			}
+
 			trigger_error(
 				$user->lang['FORUMS_MARKED'] . '<br /><br />' .
 				sprintf($user->lang['RETURN_INDEX'], '<a href="' . $redirect . '">', '</a>')
@@ -313,6 +327,20 @@ function display_forums($root_data = '', $display_moderators = true, $return_mod
 			$message = sprintf($user->lang['RETURN_FORUM'], '<a href="' . $redirect . '">', '</a>');
 			meta_refresh(3, $redirect);
 
+			if ($request->is_ajax())
+			{
+				// Tell the ajax script what language vars and URL need to be replaced
+				$data = array(
+					'NO_UNREAD_POSTS'	=> $user->lang['NO_UNREAD_POSTS'],
+					'UNREAD_POSTS'		=> $user->lang['UNREAD_POSTS'],
+					'U_MARK_FORUMS'		=> ($user->data['is_registered'] || $config['load_anon_lastread']) ? append_sid("{$phpbb_root_path}viewforum.$phpEx", 'hash=' . generate_link_hash('global') . '&f=' . $root_data['forum_id'] . '&mark=forums&mark_time=' . time()) : '',
+					'MESSAGE_TITLE'		=> $user->lang['INFORMATION'],
+					'MESSAGE_TEXT'		=> $user->lang['FORUMS_MARKED']
+				);
+				$json_response = new phpbb_json_response();
+				$json_response->send($data);
+			}
+
 			trigger_error($user->lang['FORUMS_MARKED'] . '<br /><br />' . $message);
 		}
 		else
diff --git a/phpBB/includes/functions_download.php b/phpBB/includes/functions_download.php
index fc6f1cc762..9ae647d806 100644
--- a/phpBB/includes/functions_download.php
+++ b/phpBB/includes/functions_download.php
@@ -596,7 +596,7 @@ function phpbb_parse_range_request($request_array, $filesize)
 /**
 * Increments the download count of all provided attachments
 *
-* @param dbal $db The database object
+* @param phpbb_db_driver $db The database object
 * @param array|int $ids The attach_id of each attachment
 *
 * @return null
@@ -617,7 +617,7 @@ function phpbb_increment_downloads($db, $ids)
 /**
 * Handles authentication when downloading attachments from a post or topic
 *
-* @param dbal $db The database object
+* @param phpbb_db_driver $db The database object
 * @param phpbb_auth $auth The authentication object
 * @param int $topic_id The id of the topic that we are downloading from
 *
@@ -651,7 +651,7 @@ function phpbb_download_handle_forum_auth($db, $auth, $topic_id)
 /**
 * Handles authentication when downloading attachments from PMs
 *
-* @param dbal $db The database object
+* @param phpbb_db_driver $db The database object
 * @param phpbb_auth $auth The authentication object
 * @param int $user_id The user id
 * @param int $msg_id The id of the PM that we are downloading from
@@ -678,7 +678,7 @@ function phpbb_download_handle_pm_auth($db, $auth, $user_id, $msg_id)
 /**
 * Checks whether a user can download from a particular PM
 *
-* @param dbal $db The database object
+* @param phpbb_db_driver $db The database object
 * @param int $user_id The user id
 * @param int $msg_id The id of the PM that we are downloading from
 *
diff --git a/phpBB/includes/functions_install.php b/phpBB/includes/functions_install.php
index ab6b3ea009..8978e3fadd 100644
--- a/phpBB/includes/functions_install.php
+++ b/phpBB/includes/functions_install.php
@@ -28,16 +28,18 @@ function get_available_dbms($dbms = false, $return_unavailable = false, $only_20
 			'SCHEMA'		=> 'firebird',
 			'MODULE'		=> 'interbase',
 			'DELIM'			=> ';;',
-			'DRIVER'		=> 'firebird',
+			'DRIVER'		=> 'phpbb_db_driver_firebird',
 			'AVAILABLE'		=> true,
 			'2.0.x'			=> false,
 		),
+		// Note: php 5.5 alpha 2 deprecated mysql.
+		// Keep mysqli before mysql in this list.
 		'mysqli'	=> array(
 			'LABEL'			=> 'MySQL with MySQLi Extension',
 			'SCHEMA'		=> 'mysql_41',
 			'MODULE'		=> 'mysqli',
 			'DELIM'			=> ';',
-			'DRIVER'		=> 'mysqli',
+			'DRIVER'		=> 'phpbb_db_driver_mysqli',
 			'AVAILABLE'		=> true,
 			'2.0.x'			=> true,
 		),
@@ -46,7 +48,7 @@ function get_available_dbms($dbms = false, $return_unavailable = false, $only_20
 			'SCHEMA'		=> 'mysql',
 			'MODULE'		=> 'mysql',
 			'DELIM'			=> ';',
-			'DRIVER'		=> 'mysql',
+			'DRIVER'		=> 'phpbb_db_driver_mysql',
 			'AVAILABLE'		=> true,
 			'2.0.x'			=> true,
 		),
@@ -55,7 +57,7 @@ function get_available_dbms($dbms = false, $return_unavailable = false, $only_20
 			'SCHEMA'		=> 'mssql',
 			'MODULE'		=> 'mssql',
 			'DELIM'			=> 'GO',
-			'DRIVER'		=> 'mssql',
+			'DRIVER'		=> 'phpbb_db_driver_mssql',
 			'AVAILABLE'		=> true,
 			'2.0.x'			=> true,
 		),
@@ -64,7 +66,7 @@ function get_available_dbms($dbms = false, $return_unavailable = false, $only_20
 			'SCHEMA'		=> 'mssql',
 			'MODULE'		=> 'odbc',
 			'DELIM'			=> 'GO',
-			'DRIVER'		=> 'mssql_odbc',
+			'DRIVER'		=> 'phpbb_db_driver_mssql_odbc',
 			'AVAILABLE'		=> true,
 			'2.0.x'			=> true,
 		),
@@ -73,7 +75,7 @@ function get_available_dbms($dbms = false, $return_unavailable = false, $only_20
 			'SCHEMA'		=> 'mssql',
 			'MODULE'		=> 'sqlsrv',
 			'DELIM'			=> 'GO',
-			'DRIVER'		=> 'mssqlnative',
+			'DRIVER'		=> 'phpbb_db_driver_mssqlnative',
 			'AVAILABLE'		=> true,
 			'2.0.x'			=> false,
 		),
@@ -82,7 +84,7 @@ function get_available_dbms($dbms = false, $return_unavailable = false, $only_20
 			'SCHEMA'		=> 'oracle',
 			'MODULE'		=> 'oci8',
 			'DELIM'			=> '/',
-			'DRIVER'		=> 'oracle',
+			'DRIVER'		=> 'phpbb_db_driver_oracle',
 			'AVAILABLE'		=> true,
 			'2.0.x'			=> false,
 		),
@@ -91,7 +93,7 @@ function get_available_dbms($dbms = false, $return_unavailable = false, $only_20
 			'SCHEMA'		=> 'postgres',
 			'MODULE'		=> 'pgsql',
 			'DELIM'			=> ';',
-			'DRIVER'		=> 'postgres',
+			'DRIVER'		=> 'phpbb_db_driver_postgres',
 			'AVAILABLE'		=> true,
 			'2.0.x'			=> true,
 		),
@@ -100,7 +102,7 @@ function get_available_dbms($dbms = false, $return_unavailable = false, $only_20
 			'SCHEMA'		=> 'sqlite',
 			'MODULE'		=> 'sqlite',
 			'DELIM'			=> ';',
-			'DRIVER'		=> 'sqlite',
+			'DRIVER'		=> 'phpbb_db_driver_sqlite',
 			'AVAILABLE'		=> true,
 			'2.0.x'			=> false,
 		),
@@ -205,26 +207,19 @@ function connect_check_db($error_connect, &$error, $dbms_details, $table_prefix,
 
 	$dbms = $dbms_details['DRIVER'];
 
-	if ($load_dbal)
-	{
-		// Include the DB layer
-		include($phpbb_root_path . 'includes/db/' . $dbms . '.' . $phpEx);
-	}
-
 	// Instantiate it and set return on error true
-	$sql_db = 'dbal_' . $dbms;
-	$db = new $sql_db();
+	$db = new $dbms();
 	$db->sql_return_on_error(true);
 
 	// Check that we actually have a database name before going any further.....
-	if ($dbms_details['DRIVER'] != 'sqlite' && $dbms_details['DRIVER'] != 'oracle' && $dbname === '')
+	if ($dbms_details['DRIVER'] != 'phpbb_db_driver_sqlite' && $dbms_details['DRIVER'] != 'phpbb_db_driver_oracle' && $dbname === '')
 	{
 		$error[] = $lang['INST_ERR_DB_NO_NAME'];
 		return false;
 	}
 
 	// Make sure we don't have a daft user who thinks having the SQLite database in the forum directory is a good idea
-	if ($dbms_details['DRIVER'] == 'sqlite' && stripos(phpbb_realpath($dbhost), phpbb_realpath('../')) === 0)
+	if ($dbms_details['DRIVER'] == 'phpbb_db_driver_sqlite' && stripos(phpbb_realpath($dbhost), phpbb_realpath('../')) === 0)
 	{
 		$error[] = $lang['INST_ERR_DB_FORUM_PATH'];
 		return false;
@@ -233,8 +228,8 @@ function connect_check_db($error_connect, &$error, $dbms_details, $table_prefix,
 	// Check the prefix length to ensure that index names are not too long and does not contain invalid characters
 	switch ($dbms_details['DRIVER'])
 	{
-		case 'mysql':
-		case 'mysqli':
+		case 'phpbb_db_driver_mysql':
+		case 'phpbb_db_driver_mysqli':
 			if (strspn($table_prefix, '-./\\') !== 0)
 			{
 				$error[] = $lang['INST_ERR_PREFIX_INVALID'];
@@ -243,22 +238,22 @@ function connect_check_db($error_connect, &$error, $dbms_details, $table_prefix,
 
 		// no break;
 
-		case 'postgres':
+		case 'phpbb_db_driver_postgres':
 			$prefix_length = 36;
 		break;
 
-		case 'mssql':
-		case 'mssql_odbc':
-		case 'mssqlnative':
+		case 'phpbb_db_driver_mssql':
+		case 'phpbb_db_driver_mssql_odbc':
+		case 'phpbb_db_driver_mssqlnative':
 			$prefix_length = 90;
 		break;
 
-		case 'sqlite':
+		case 'phpbb_db_driver_sqlite':
 			$prefix_length = 200;
 		break;
 
-		case 'firebird':
-		case 'oracle':
+		case 'phpbb_db_driver_firebird':
+		case 'phpbb_db_driver_oracle':
 			$prefix_length = 6;
 		break;
 	}
@@ -296,21 +291,21 @@ function connect_check_db($error_connect, &$error, $dbms_details, $table_prefix,
 		// Make sure that the user has selected a sensible DBAL for the DBMS actually installed
 		switch ($dbms_details['DRIVER'])
 		{
-			case 'mysqli':
+			case 'phpbb_db_driver_mysqli':
 				if (version_compare(mysqli_get_server_info($db->db_connect_id), '4.1.3', '<'))
 				{
 					$error[] = $lang['INST_ERR_DB_NO_MYSQLI'];
 				}
 			break;
 
-			case 'sqlite':
+			case 'phpbb_db_driver_sqlite':
 				if (version_compare(sqlite_libversion(), '2.8.2', '<'))
 				{
 					$error[] = $lang['INST_ERR_DB_NO_SQLITE'];
 				}
 			break;
 
-			case 'firebird':
+			case 'phpbb_db_driver_firebird':
 				// check the version of FB, use some hackery if we can't get access to the server info
 				if ($db->service_handle !== false && function_exists('ibase_server_info'))
 				{
@@ -391,7 +386,7 @@ function connect_check_db($error_connect, &$error, $dbms_details, $table_prefix,
 				}
 			break;
 
-			case 'oracle':
+			case 'phpbb_db_driver_oracle':
 				if ($unicode_check)
 				{
 					$sql = "SELECT *
@@ -413,7 +408,7 @@ function connect_check_db($error_connect, &$error, $dbms_details, $table_prefix,
 				}
 			break;
 
-			case 'postgres':
+			case 'phpbb_db_driver_postgres':
 				if ($unicode_check)
 				{
 					$sql = "SHOW server_encoding;";
@@ -515,6 +510,9 @@ function phpbb_create_config_file_data($data, $dbms, $debug = false, $debug_test
 		'dbuser'		=> $data['dbuser'],
 		'dbpasswd'		=> htmlspecialchars_decode($data['dbpasswd']),
 		'table_prefix'	=> $data['table_prefix'],
+
+		'adm_relative_path'	=> 'adm/',
+
 		'acm_type'		=> 'phpbb_cache_driver_file',
 	);
 
diff --git a/phpBB/includes/functions_messenger.php b/phpBB/includes/functions_messenger.php
index a18aeddabd..821f0d970d 100644
--- a/phpBB/includes/functions_messenger.php
+++ b/phpBB/includes/functions_messenger.php
@@ -210,7 +210,7 @@ class messenger
 		{
 			$style_resource_locator = new phpbb_style_resource_locator();
 			$style_path_provider = new phpbb_style_extension_path_provider($phpbb_extension_manager, new phpbb_style_path_provider());
-			$tpl = new phpbb_template($phpbb_root_path, $phpEx, $config, $user, $style_resource_locator, new phpbb_template_context());
+			$tpl = new phpbb_template($phpbb_root_path, $phpEx, $config, $user, $style_resource_locator, new phpbb_template_context(), $phpbb_extension_manager);
 			$style = new phpbb_style($phpbb_root_path, $phpEx, $config, $user, $style_resource_locator, $style_path_provider, $tpl);
 
 			$this->tpl_msg[$template_lang . $template_file] = $tpl;
@@ -231,7 +231,7 @@ class messenger
 				}
 			}
 
-			$style->set_custom_style($template_lang . '_email', array($template_path, $fallback_template_path), '');
+			$style->set_custom_style($template_lang . '_email', array($template_path, $fallback_template_path), array(), '');
 
 			$tpl->set_filenames(array(
 				'body'		=> $template_file . '.txt',
@@ -393,6 +393,28 @@ class messenger
 	}
 
 	/**
+	* Generates a valid message id to be used in emails
+	*
+	* @return string message id
+	*/
+	function generate_message_id()
+	{
+		global $config;
+
+		$domain = 'phpbb.generated';
+		if ($config['server_name'])
+		{
+			$domain = $config['server_name'];
+		}
+		else if (!empty($_SERVER['SERVER_NAME']))
+		{
+			$domain = $_SERVER['SERVER_NAME'];
+		}
+
+		return md5(unique_id(time())) . '@' . $domain;
+	}
+
+	/**
 	* Return email header
 	*/
 	function build_header($to, $cc, $bcc)
@@ -418,7 +440,7 @@ class messenger
 		$headers[] = 'Return-Path: <' . $config['board_email'] . '>';
 		$headers[] = 'Sender: <' . $config['board_email'] . '>';
 		$headers[] = 'MIME-Version: 1.0';
-		$headers[] = 'Message-ID: <' . md5(unique_id(time())) . '@' . $config['server_name'] . '>';
+		$headers[] = 'Message-ID: <' . $this->generate_message_id() . '>';
 		$headers[] = 'Date: ' . date('r', time());
 		$headers[] = 'Content-Type: text/plain; charset=UTF-8'; // format=flowed
 		$headers[] = 'Content-Transfer-Encoding: 8bit'; // 7bit
diff --git a/phpBB/includes/functions_posting.php b/phpBB/includes/functions_posting.php
index 171cf988ce..8aea27a9ef 100644
--- a/phpBB/includes/functions_posting.php
+++ b/phpBB/includes/functions_posting.php
@@ -1695,8 +1695,9 @@ function submit_post($mode, $subject, $username, $topic_type, &$poll, &$data, $u
 	// The variable name should be $post_approved, because it indicates if the post is approved or not
 	$post_approval = 1;
 
-	// Check the permissions for post approval. Moderators are not affected.
-	if (!$auth->acl_get('f_noapprove', $data['forum_id']) && !$auth->acl_get('m_approve', $data['forum_id']))
+	// Check the permissions for post approval.
+	// Moderators must go through post approval like ordinary users.
+	if (!$auth->acl_get('f_noapprove', $data['forum_id']))
 	{
 		// Post not approved, but in queue
 		$post_approval = 0;
diff --git a/phpBB/includes/functions_upload.php b/phpBB/includes/functions_upload.php
index b467aa93d1..4f31a85e83 100644
--- a/phpBB/includes/functions_upload.php
+++ b/phpBB/includes/functions_upload.php
@@ -70,7 +70,7 @@ class filespec
 			$this->mimetype = 'application/octetstream';
 		}
 
-		$this->extension = strtolower($this->get_extension($this->realname));
+		$this->extension = strtolower(self::get_extension($this->realname));
 
 		// Try to get real filesize from temporary folder (not always working) ;)
 		$this->filesize = (@filesize($this->filename)) ? @filesize($this->filename) : $this->filesize;
@@ -187,8 +187,11 @@ class filespec
 
 	/**
 	* Get file extension
+	*
+	* @param string Filename that needs to be checked
+	* @return string Extension of the supplied filename
 	*/
-	function get_extension($filename)
+	static public function get_extension($filename)
 	{
 		if (strpos($filename, '.') === false)
 		{
@@ -369,7 +372,7 @@ class filespec
 				}
 
 				// Check image type
-				$types = $this->upload->image_types();
+				$types = fileupload::image_types();
 
 				if (!isset($types[$this->image_info[2]]) || !in_array($this->extension, $types[$this->image_info[2]]))
 				{
@@ -1019,9 +1022,11 @@ class fileupload
 	}
 
 	/**
-	* Return image type/extension mapping
+	* Get image type/extension mapping
+	*
+	* @return array Array containing the image types and their extensions
 	*/
-	function image_types()
+	static public function image_types()
 	{
 		return array(
 			IMAGETYPE_GIF		=> array('gif'),
diff --git a/phpBB/includes/functions_user.php b/phpBB/includes/functions_user.php
index 33b62fe8b8..379abe4d42 100644
--- a/phpBB/includes/functions_user.php
+++ b/phpBB/includes/functions_user.php
@@ -2676,12 +2676,12 @@ function group_create(&$group_id, $type, $name, $desc, $group_attributes, $allow
 			}
 			$db->sql_freeresult($result);
 
-			if (isset($sql_ary['group_avatar']) && !$sql_ary['group_avatar'])
+			if (isset($sql_ary['group_avatar']))
 			{
 				remove_default_avatar($group_id, $user_ary);
 			}
 
-			if (isset($sql_ary['group_rank']) && !$sql_ary['group_rank'])
+			if (isset($sql_ary['group_rank']))
 			{
 				remove_default_rank($group_id, $user_ary);
 			}
@@ -2845,7 +2845,7 @@ function avatar_remove_db($avatar_name)
 */
 function group_delete($group_id, $group_name = false)
 {
-	global $db, $user, $phpbb_root_path, $phpEx, $phpbb_dispatcher, $phpbb_container;
+	global $db, $cache, $auth, $user, $phpbb_root_path, $phpEx, $phpbb_dispatcher, $phpbb_container;
 
 	if (!$group_name)
 	{
@@ -2917,12 +2917,12 @@ function group_delete($group_id, $group_name = false)
 	extract($phpbb_dispatcher->trigger_event('core.delete_group_after', compact($vars)));
 
 	// Re-cache moderators
-	if (!function_exists('cache_moderators'))
+	if (!function_exists('phpbb_cache_moderators'))
 	{
 		include($phpbb_root_path . 'includes/functions_admin.' . $phpEx);
 	}
 
-	cache_moderators();
+	phpbb_cache_moderators($db, $cache, $auth);
 
 	add_log('admin', 'LOG_GROUP_DELETE', $group_name);
 
@@ -3212,8 +3212,8 @@ function remove_default_avatar($group_id, $user_ids)
 			user_avatar_width = 0,
 			user_avatar_height = 0
 		WHERE group_id = " . (int) $group_id . "
-		AND user_avatar = '" . $db->sql_escape($row['group_avatar']) . "'
-		AND " . $db->sql_in_set('user_id', $user_ids);
+			AND user_avatar = '" . $db->sql_escape($row['group_avatar']) . "'
+			AND " . $db->sql_in_set('user_id', $user_ids);
 
 	$db->sql_query($sql);
 }
@@ -3250,9 +3250,9 @@ function remove_default_rank($group_id, $user_ids)
 	$sql = 'UPDATE ' . USERS_TABLE . '
 		SET user_rank = 0
 		WHERE group_id = ' . (int)$group_id . '
-		AND user_rank <> 0
-		AND user_rank = ' . (int)$row['group_rank'] . '
-		AND ' . $db->sql_in_set('user_id', $user_ids);
+			AND user_rank <> 0
+			AND user_rank = ' . (int)$row['group_rank'] . '
+			AND ' . $db->sql_in_set('user_id', $user_ids);
 	$db->sql_query($sql);
 }
 
@@ -3281,7 +3281,8 @@ function group_user_attributes($action, $group_id, $user_id_ary = false, $userna
 		case 'demote':
 		case 'promote':
 
-			$sql = 'SELECT user_id FROM ' . USER_GROUP_TABLE . "
+			$sql = 'SELECT user_id
+				FROM ' . USER_GROUP_TABLE . "
 				WHERE group_id = $group_id
 					AND user_pending = 1
 					AND " . $db->sql_in_set('user_id', $user_id_ary);
@@ -3379,7 +3380,8 @@ function group_user_attributes($action, $group_id, $user_id_ary = false, $userna
 				return 'NO_USERS';
 			}
 
-			$sql = 'SELECT user_id, group_id FROM ' . USERS_TABLE . '
+			$sql = 'SELECT user_id, group_id
+				FROM ' . USERS_TABLE . '
 				WHERE ' . $db->sql_in_set('user_id', $user_id_ary, false, true);
 			$result = $db->sql_query($sql);
 
@@ -3467,7 +3469,7 @@ function group_validate_groupname($group_id, $group_name)
 */
 function group_set_user_default($group_id, $user_id_ary, $group_attributes = false, $update_listing = false)
 {
-	global $cache, $db, $phpbb_dispatcher;
+	global $phpbb_container, $db, $phpbb_dispatcher;
 
 	if (empty($user_id_ary))
 	{
@@ -3513,45 +3515,69 @@ function group_set_user_default($group_id, $user_id_ary, $group_attributes = fal
 		}
 	}
 
-	// Before we update the user attributes, we will make a list of those having now the group avatar assigned
-	if (isset($sql_ary['user_avatar']))
+	$updated_sql_ary = $sql_ary;
+
+	// Before we update the user attributes, we will update the rank for users that don't have a custom rank
+	if (isset($sql_ary['user_rank']))
 	{
-		// Ok, get the original avatar data from users having an uploaded one (we need to remove these from the filesystem)
-		$sql = 'SELECT user_id, group_id, user_avatar
-			FROM ' . USERS_TABLE . '
-			WHERE ' . $db->sql_in_set('user_id', $user_id_ary) . '
-				AND user_avatar_type = ' . AVATAR_UPLOAD;
-		$result = $db->sql_query($sql);
+		$sql = 'UPDATE ' . USERS_TABLE . '
+			SET ' . $db->sql_build_array('UPDATE', array('user_rank' => $sql_ary['user_rank'])) . '
+			WHERE user_rank = 0
+				AND ' . $db->sql_in_set('user_id', $user_id_ary);
+		$db->sql_query($sql);
+		unset($sql_ary['user_rank']);
+	}
 
-		while ($row = $db->sql_fetchrow($result))
+	// Before we update the user attributes, we will update the avatar for users that don't have a custom avatar
+	$avatar_options = array('user_avatar', 'user_avatar_type', 'user_avatar_height', 'user_avatar_width');
+
+	if (isset($sql_ary['user_avatar']))
+	{
+		$avatar_sql_ary = array();
+		foreach ($avatar_options as $avatar_option)
 		{
-			avatar_delete('user', $row);
-		}
-		$db->sql_freeresult($result);
+			if (isset($sql_ary[$avatar_option]))
+			{
+				$avatar_sql_ary[$avatar_option] = $sql_ary[$avatar_option];
+				}
+			}
+
+		$sql = 'UPDATE ' . USERS_TABLE . '
+			SET ' . $db->sql_build_array('UPDATE', $avatar_sql_ary) . "
+			WHERE user_avatar = ''
+				AND " . $db->sql_in_set('user_id', $user_id_ary);
+		$db->sql_query($sql);
 	}
-	else
+
+	// Remove the avatar options, as we already updated them
+	foreach ($avatar_options as $avatar_option)
 	{
-		unset($sql_ary['user_avatar_type']);
-		unset($sql_ary['user_avatar_height']);
-		unset($sql_ary['user_avatar_width']);
+		unset($sql_ary[$avatar_option]);
 	}
 
-	$sql = 'UPDATE ' . USERS_TABLE . ' SET ' . $db->sql_build_array('UPDATE', $sql_ary) . '
-		WHERE ' . $db->sql_in_set('user_id', $user_id_ary);
-	$db->sql_query($sql);
+	if (!empty($sql_ary))
+	{
+		$sql = 'UPDATE ' . USERS_TABLE . '
+			SET ' . $db->sql_build_array('UPDATE', $sql_ary) . '
+			WHERE ' . $db->sql_in_set('user_id', $user_id_ary);
+		$db->sql_query($sql);
+	}
 
 	if (isset($sql_ary['user_colour']))
 	{
 		// Update any cached colour information for these users
-		$sql = 'UPDATE ' . FORUMS_TABLE . " SET forum_last_poster_colour = '" . $db->sql_escape($sql_ary['user_colour']) . "'
+		$sql = 'UPDATE ' . FORUMS_TABLE . "
+			SET forum_last_poster_colour = '" . $db->sql_escape($sql_ary['user_colour']) . "'
 			WHERE " . $db->sql_in_set('forum_last_poster_id', $user_id_ary);
 		$db->sql_query($sql);
 
-		$sql = 'UPDATE ' . TOPICS_TABLE . " SET topic_first_poster_colour = '" . $db->sql_escape($sql_ary['user_colour']) . "'
+		$sql = 'UPDATE ' . TOPICS_TABLE . "
+			SET topic_first_poster_colour = '" . $db->sql_escape($sql_ary['user_colour']) . "'
 			WHERE " . $db->sql_in_set('topic_poster', $user_id_ary);
 		$db->sql_query($sql);
 
-		$sql = 'UPDATE ' . TOPICS_TABLE . " SET topic_last_poster_colour = '" . $db->sql_escape($sql_ary['user_colour']) . "'
+		$sql = 'UPDATE ' . TOPICS_TABLE . "
+			SET topic_last_poster_colour = '" . $db->sql_escape($sql_ary['user_colour']) . "'
 			WHERE " . $db->sql_in_set('topic_last_poster_id', $user_id_ary);
 		$db->sql_query($sql);
 
@@ -3563,6 +3589,9 @@ function group_set_user_default($group_id, $user_id_ary, $group_attributes = fal
 		}
 	}
 
+	// Make all values available for the event
+	$sql_ary = $updated_sql_ary;
+
 	/**
 	* Event when the default group is set for an array of users
 	*
@@ -3583,7 +3612,7 @@ function group_set_user_default($group_id, $user_id_ary, $group_attributes = fal
 	}
 
 	// Because some tables/caches use usercolour-specific data we need to purge this here.
-	$cache->destroy('sql', MODERATOR_CACHE_TABLE);
+	$phpbb_container->get('cache.driver')->destroy('sql', MODERATOR_CACHE_TABLE);
 }
 
 /**
@@ -3682,7 +3711,7 @@ function group_memberships($group_id_ary = false, $user_id_ary = false, $return_
 */
 function group_update_listings($group_id)
 {
-	global $auth;
+	global $db, $cache, $auth;
 
 	$hold_ary = $auth->acl_group_raw_data($group_id, array('a_', 'm_'));
 
@@ -3724,22 +3753,22 @@ function group_update_listings($group_id)
 
 	if ($mod_permissions)
 	{
-		if (!function_exists('cache_moderators'))
+		if (!function_exists('phpbb_cache_moderators'))
 		{
 			global $phpbb_root_path, $phpEx;
 			include($phpbb_root_path . 'includes/functions_admin.' . $phpEx);
 		}
-		cache_moderators();
+		phpbb_cache_moderators($db, $cache, $auth);
 	}
 
 	if ($mod_permissions || $admin_permissions)
 	{
-		if (!function_exists('update_foes'))
+		if (!function_exists('phpbb_update_foes'))
 		{
 			global $phpbb_root_path, $phpEx;
 			include($phpbb_root_path . 'includes/functions_admin.' . $phpEx);
 		}
-		update_foes(array($group_id));
+		phpbb_update_foes($db, $auth, array($group_id));
 	}
 }
 
diff --git a/phpBB/includes/hook/finder.php b/phpBB/includes/hook/finder.php
new file mode 100644
index 0000000000..065e685514
--- /dev/null
+++ b/phpBB/includes/hook/finder.php
@@ -0,0 +1,84 @@
+<?php
+/**
+*
+* @package extension
+* @copyright (c) 2013 phpBB Group
+* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
+*
+*/
+
+/**
+* @ignore
+*/
+if (!defined('IN_PHPBB'))
+{
+	exit;
+}
+
+/**
+* The hook finder locates installed hooks.
+*
+* @package phpBB3
+*/
+class phpbb_hook_finder
+{
+	protected $phpbb_root_path;
+	protected $cache;
+	protected $php_ext;
+
+	/**
+	* Creates a new finder instance.
+	*
+	* @param string $phpbb_root_path Path to the phpbb root directory
+	* @param string $php_ext php file extension
+	* @param phpbb_cache_driver_interface $cache A cache instance or null
+	*/
+	public function __construct($phpbb_root_path, $php_ext, phpbb_cache_driver_interface $cache = null)
+	{
+		$this->phpbb_root_path = $phpbb_root_path;
+		$this->cache = $cache;
+		$this->php_ext = $php_ext;
+	}
+
+	/**
+	* Finds all hook files.
+	*
+	* @param bool $cache Whether the result should be cached
+	* @return array An array of paths to found hook files
+	*/
+	public function find($cache = true)
+	{
+		if (!defined('DEBUG') && $cache && $this->cache)
+		{
+			$hook_files = $this->cache->get('_hooks');
+			if ($hook_files !== false)
+			{
+				return $hook_files;
+			}
+		}
+
+		$hook_files = array();
+
+		// Now search for hooks...
+		$dh = @opendir($this->phpbb_root_path . 'includes/hooks/');
+
+		if ($dh)
+		{
+			while (($file = readdir($dh)) !== false)
+			{
+				if (strpos($file, 'hook_') === 0 && substr($file, -(strlen($this->php_ext) + 1)) === '.' . $this->php_ext)
+				{
+					$hook_files[] = substr($file, 0, -(strlen($this->php_ext) + 1));
+				}
+			}
+			closedir($dh);
+		}
+
+		if ($cache && $this->cache)
+		{
+			$this->cache->put('_hooks', $hook_files);
+		}
+
+		return $hook_files;
+	}
+}
diff --git a/phpBB/includes/lock/db.php b/phpBB/includes/lock/db.php
index 6e94dd5a85..ccdaed0b28 100644
--- a/phpBB/includes/lock/db.php
+++ b/phpBB/includes/lock/db.php
@@ -48,7 +48,7 @@ class phpbb_lock_db
 
 	/**
 	* A database connection
-	* @var dbal
+	* @var phpbb_db_driver
 	*/
 	private $db;
 
@@ -59,9 +59,9 @@ class phpbb_lock_db
 	*
 	* @param	string	$config_name	A config variable to be used for locking
 	* @param	array	$config			The phpBB configuration
-	* @param	dbal	$db				A database connection
+	* @param	phpbb_db_driver	$db				A database connection
 	*/
-	public function __construct($config_name, phpbb_config $config, dbal $db)
+	public function __construct($config_name, phpbb_config $config, phpbb_db_driver $db)
 	{
 		$this->config_name = $config_name;
 		$this->config = $config;
diff --git a/phpBB/includes/mcp/mcp_forum.php b/phpBB/includes/mcp/mcp_forum.php
index 4dd5e5856a..0fad9e2a22 100644
--- a/phpBB/includes/mcp/mcp_forum.php
+++ b/phpBB/includes/mcp/mcp_forum.php
@@ -430,13 +430,16 @@ function merge_topics($forum_id, $topic_ids, $to_topic_id)
 		// Message and return links
 		$success_msg = 'POSTS_MERGED_SUCCESS';
 
-		// If the topic no longer exist, we will update the topic watch table.
-		// To not let it error out on users watching both topics, we just return on an error...
-		$db->sql_return_on_error(true);
-		$db->sql_query('UPDATE ' . TOPICS_WATCH_TABLE . ' SET topic_id = ' . (int) $to_topic_id . ' WHERE ' . $db->sql_in_set('topic_id', $topic_ids));
-		$db->sql_return_on_error(false);
+		if (!function_exists('phpbb_update_rows_avoiding_duplicates_notify_status'))
+		{
+			include($phpbb_root_path . 'includes/functions_database_helper.' . $phpEx);
+		}
+
+		// Update the topic watch table.
+		phpbb_update_rows_avoiding_duplicates_notify_status($db, TOPICS_WATCH_TABLE, 'topic_id', $topic_ids, $to_topic_id);
 
-		$db->sql_query('DELETE FROM ' . TOPICS_WATCH_TABLE . ' WHERE ' . $db->sql_in_set('topic_id', $topic_ids));
+		// Update the bookmarks table.
+		phpbb_update_rows_avoiding_duplicates($db, BOOKMARKS_TABLE, 'topic_id', $topic_ids, $to_topic_id);
 
 		// Link to the new topic
 		$return_link .= (($return_link) ? '<br /><br />' : '') . sprintf($user->lang['RETURN_NEW_TOPIC'], '<a href="' . append_sid("{$phpbb_root_path}viewtopic.$phpEx", 'f=' . $to_forum_id . '&amp;t=' . $to_topic_id) . '">', '</a>');
diff --git a/phpBB/includes/mcp/mcp_main.php b/phpBB/includes/mcp/mcp_main.php
index 95ca7c2e1b..c28b466bcf 100644
--- a/phpBB/includes/mcp/mcp_main.php
+++ b/phpBB/includes/mcp/mcp_main.php
@@ -1080,6 +1080,7 @@ function mcp_fork_topic($topic_ids)
 				}
 			}
 
+			// Copy topic subscriptions to new topic
 			$sql = 'SELECT user_id, notify_status
 				FROM ' . TOPICS_WATCH_TABLE . '
 				WHERE topic_id = ' . $topic_id;
@@ -1100,6 +1101,27 @@ function mcp_fork_topic($topic_ids)
 			{
 				$db->sql_multi_insert(TOPICS_WATCH_TABLE, $sql_ary);
 			}
+
+			// Copy bookmarks to new topic
+			$sql = 'SELECT user_id
+				FROM ' . BOOKMARKS_TABLE . '
+				WHERE topic_id = ' . $topic_id;
+			$result = $db->sql_query($sql);
+
+			$sql_ary = array();
+			while ($row = $db->sql_fetchrow($result))
+			{
+				$sql_ary[] = array(
+					'topic_id'		=> (int) $new_topic_id,
+					'user_id'		=> (int) $row['user_id'],
+				);
+			}
+			$db->sql_freeresult($result);
+
+			if (sizeof($sql_ary))
+			{
+				$db->sql_multi_insert(BOOKMARKS_TABLE, $sql_ary);
+			}
 		}
 
 		// Sync new topics, parent forums and board stats
diff --git a/phpBB/includes/mcp/mcp_pm_reports.php b/phpBB/includes/mcp/mcp_pm_reports.php
index be18dba944..86650947c7 100644
--- a/phpBB/includes/mcp/mcp_pm_reports.php
+++ b/phpBB/includes/mcp/mcp_pm_reports.php
@@ -122,6 +122,7 @@ class mcp_pm_reports
 
 				$message = bbcode_nl2br($message);
 				$message = smiley_text($message);
+				$report['report_text'] = make_clickable(bbcode_nl2br($report['report_text']));
 
 				if ($pm_info['message_attachment'] && $auth->acl_get('u_pm_download'))
 				{
diff --git a/phpBB/includes/mcp/mcp_reports.php b/phpBB/includes/mcp/mcp_reports.php
index 3426d62cdb..8da303f6e3 100644
--- a/phpBB/includes/mcp/mcp_reports.php
+++ b/phpBB/includes/mcp/mcp_reports.php
@@ -71,7 +71,7 @@ class mcp_reports
 				// closed reports are accessed by report id
 				$report_id = request_var('r', 0);
 
-				$sql = 'SELECT r.post_id, r.user_id, r.report_id, r.report_closed, report_time, r.report_text, r.reported_post_text, r.reported_post_uid, r.reported_post_bitfield, rr.reason_title, rr.reason_description, u.username, u.username_clean, u.user_colour
+				$sql = 'SELECT r.post_id, r.user_id, r.report_id, r.report_closed, report_time, r.report_text, r.reported_post_text, r.reported_post_uid, r.reported_post_bitfield, r.reported_post_enable_magic_url, r.reported_post_enable_smilies, r.reported_post_enable_bbcode, rr.reason_title, rr.reason_description, u.username, u.username_clean, u.user_colour
 					FROM ' . REPORTS_TABLE . ' r, ' . REPORTS_REASONS_TABLE . ' rr, ' . USERS_TABLE . ' u
 					WHERE ' . (($report_id) ? 'r.report_id = ' . $report_id : "r.post_id = $post_id") . '
 						AND rr.reason_id = r.reason_id
@@ -94,6 +94,10 @@ class mcp_reports
 
 				$post_id = $report['post_id'];
 				$report_id = $report['report_id'];
+				
+				$parse_post_flags = $report['reported_post_enable_bbcode'] ? OPTION_FLAG_BBCODE : 0;
+				$parse_post_flags += $report['reported_post_enable_smilies'] ? OPTION_FLAG_SMILIES : 0;
+				$parse_post_flags += $report['reported_post_enable_magic_url'] ? OPTION_FLAG_LINKS : 0; 
 
 				$post_info = get_post_data(array($post_id), 'm_report', true);
 
@@ -136,18 +140,7 @@ class mcp_reports
 
 				$post_unread = (isset($topic_tracking_info[$post_info['topic_id']]) && $post_info['post_time'] > $topic_tracking_info[$post_info['topic_id']]) ? true : false;
 
-				// Process message, leave it uncensored
-				$message = $post_info['post_text'];
 
-				if ($post_info['bbcode_bitfield'])
-				{
-					include_once($phpbb_root_path . 'includes/bbcode.' . $phpEx);
-					$bbcode = new bbcode($post_info['bbcode_bitfield']);
-					$bbcode->bbcode_second_pass($message, $post_info['bbcode_uid'], $post_info['bbcode_bitfield']);
-				}
-
-				$message = bbcode_nl2br($message);
-				$message = smiley_text($message);
 				$report['report_text'] = make_clickable(bbcode_nl2br($report['report_text']));
 
 				if ($post_info['post_attachment'] && $auth->acl_get('u_download') && $auth->acl_get('f_download', $post_info['forum_id']))
@@ -168,7 +161,7 @@ class mcp_reports
 					if (sizeof($attachments))
 					{
 						$update_count = array();
-						parse_attachments($post_info['forum_id'], $message, $attachments, $update_count);
+						parse_attachments($post_info['forum_id'], $report['reported_post_text'], $attachments, $update_count);
 					}
 
 					// Display not already displayed Attachments for this post, we already parsed them. ;)
@@ -227,7 +220,7 @@ class mcp_reports
 					'REPORTER_NAME'				=> get_username_string('username', $report['user_id'], $report['username'], $report['user_colour']),
 					'U_VIEW_REPORTER_PROFILE'	=> get_username_string('profile', $report['user_id'], $report['username'], $report['user_colour']),
 
-					'POST_PREVIEW'			=> generate_text_for_display($report['reported_post_text'], $report['reported_post_uid'], $report['reported_post_bitfield'], OPTION_FLAG_BBCODE | OPTION_FLAG_SMILIES, false),
+					'POST_PREVIEW'			=> generate_text_for_display($report['reported_post_text'], $report['reported_post_uid'], $report['reported_post_bitfield'], $parse_post_flags, false),
 					'POST_SUBJECT'			=> ($post_info['post_subject']) ? $post_info['post_subject'] : $user->lang['NO_SUBJECT'],
 					'POST_DATE'				=> $user->format_date($post_info['post_time']),
 					'POST_IP'				=> $post_info['poster_ip'],
diff --git a/phpBB/includes/mcp/mcp_topic.php b/phpBB/includes/mcp/mcp_topic.php
index 63ff7bed72..e3dd5a6b57 100644
--- a/phpBB/includes/mcp/mcp_topic.php
+++ b/phpBB/includes/mcp/mcp_topic.php
@@ -521,6 +521,49 @@ function split_topic($action, $topic_id, $to_forum_id, $subject)
 			WHERE post_id = {$post_id_list[0]}";
 		$db->sql_query($sql);
 
+		// Copy topic subscriptions to new topic
+		$sql = 'SELECT user_id, notify_status
+			FROM ' . TOPICS_WATCH_TABLE . '
+			WHERE topic_id = ' . $topic_id;
+		$result = $db->sql_query($sql);
+
+		$sql_ary = array();
+		while ($row = $db->sql_fetchrow($result))
+		{
+			$sql_ary[] = array(
+				'topic_id'		=> (int) $to_topic_id,
+				'user_id'		=> (int) $row['user_id'],
+				'notify_status'	=> (int) $row['notify_status'],
+			);
+		}
+		$db->sql_freeresult($result);
+
+		if (sizeof($sql_ary))
+		{
+			$db->sql_multi_insert(TOPICS_WATCH_TABLE, $sql_ary);
+		}
+
+		// Copy bookmarks to new topic
+		$sql = 'SELECT user_id
+			FROM ' . BOOKMARKS_TABLE . '
+			WHERE topic_id = ' . $topic_id;
+		$result = $db->sql_query($sql);
+
+		$sql_ary = array();
+		while ($row = $db->sql_fetchrow($result))
+		{
+			$sql_ary[] = array(
+				'topic_id'		=> (int) $to_topic_id,
+				'user_id'		=> (int) $row['user_id'],
+			);
+		}
+		$db->sql_freeresult($result);
+
+		if (sizeof($sql_ary))
+		{
+			$db->sql_multi_insert(BOOKMARKS_TABLE, $sql_ary);
+		}
+
 		$success_msg = 'TOPIC_SPLIT_SUCCESS';
 
 		// Update forum statistics
@@ -623,13 +666,16 @@ function merge_posts($topic_id, $to_topic_id)
 		}
 		else
 		{
+			if (!function_exists('phpbb_update_rows_avoiding_duplicates_notify_status'))
+			{
+				include($phpbb_root_path . 'includes/functions_database_helper.' . $phpEx);
+			}
+
 			// If the topic no longer exist, we will update the topic watch table.
-			// To not let it error out on users watching both topics, we just return on an error...
-			$db->sql_return_on_error(true);
-			$db->sql_query('UPDATE ' . TOPICS_WATCH_TABLE . ' SET topic_id = ' . (int) $to_topic_id . ' WHERE topic_id = ' . (int) $topic_id);
-			$db->sql_return_on_error(false);
+			phpbb_update_rows_avoiding_duplicates_notify_status($db, TOPICS_WATCH_TABLE, 'topic_id', $topic_ids, $to_topic_id);
 
-			$db->sql_query('DELETE FROM ' . TOPICS_WATCH_TABLE . ' WHERE topic_id = ' . (int) $topic_id);
+			// If the topic no longer exist, we will update the bookmarks table.
+			phpbb_update_rows_avoiding_duplicates($db, BOOKMARKS_TABLE, 'topic_id', $topic_id, $to_topic_id);
 		}
 
 		// Link to the new topic
diff --git a/phpBB/includes/message_parser.php b/phpBB/includes/message_parser.php
index 1cd2a46fa1..44960dd78d 100644
--- a/phpBB/includes/message_parser.php
+++ b/phpBB/includes/message_parser.php
@@ -702,17 +702,6 @@ class bbcode_firstpass extends bbcode
 	{
 		global $config, $user;
 
-		/**
-		* If you change this code, make sure the cases described within the following reports are still working:
-		* #3572 - [quote="[test]test"]test [ test[/quote] - (correct: parsed)
-		* #14667 - [quote]test[/quote] test ] and [ test [quote]test[/quote] (correct: parsed)
-		* #14770 - [quote="["]test[/quote] (correct: parsed)
-		* [quote="[i]test[/i]"]test[/quote] (correct: parsed)
-		* [quote="[quote]test[/quote]"]test[/quote] (correct: parsed - Username displayed as [quote]test[/quote])
-		* #20735 - [quote]test[/[/b]quote] test [/quote][/quote] test - (correct: quoted: "test[/[/b]quote] test" / non-quoted: "[/quote] test" - also failed if layout distorted)
-		* #40565 - [quote="a"]a[/quote][quote="a]a[/quote] (correct: first quote tag parsed, second quote tag unparsed)
-		*/
-
 		$in = str_replace("\r\n", "\n", str_replace('\"', '"', trim($in)));
 
 		if (!$in)
diff --git a/phpBB/includes/questionnaire/questionnaire.php b/phpBB/includes/questionnaire/questionnaire.php
index 2d29fe978e..6f2727a38c 100644
--- a/phpBB/includes/questionnaire/questionnaire.php
+++ b/phpBB/includes/questionnaire/questionnaire.php
@@ -260,6 +260,8 @@ class phpbb_questionnaire_phpbb_data_provider
 		include("{$phpbb_root_path}config.$phpEx");
 		unset($dbhost, $dbport, $dbname, $dbuser, $dbpasswd); // Just a precaution
 
+		$dbms = phpbb_convert_30_dbms_to_31($dbms);
+
 		// Only send certain config vars
 		$config_vars = array(
 			'active_sessions' => true,
diff --git a/phpBB/includes/search/base.php b/phpBB/includes/search/base.php
index b364dead9a..914cef9167 100644
--- a/phpBB/includes/search/base.php
+++ b/phpBB/includes/search/base.php
@@ -94,7 +94,7 @@ class phpbb_search_base
 	*
 	* @return int SEARCH_RESULT_NOT_IN_CACHE or SEARCH_RESULT_IN_CACHE or SEARCH_RESULT_INCOMPLETE
 	*/
-	function obtain_ids($search_key, &$result_count, &$id_ary, $start, $per_page, $sort_dir)
+	function obtain_ids($search_key, &$result_count, &$id_ary, &$start, $per_page, $sort_dir)
 	{
 		global $cache;
 
@@ -109,6 +109,19 @@ class phpbb_search_base
 			$reverse_ids = ($stored_ids[-2] != $sort_dir) ? true : false;
 			$complete = true;
 
+			// Change start parameter in case out of bounds
+			if ($result_count)
+			{
+				if ($start < 0)
+				{
+					$start = 0;
+				}
+				else if ($start >= $result_count)
+				{
+					$start = floor(($result_count - 1) / $per_page) * $per_page;
+				}
+			}
+
 			// change the start to the actual end of the current request if the sort direction differs
 			// from the dirction in the cache and reverse the ids later
 			if ($reverse_ids)
diff --git a/phpBB/includes/search/fulltext_mysql.php b/phpBB/includes/search/fulltext_mysql.php
index ff2e24aa05..adaf025730 100644
--- a/phpBB/includes/search/fulltext_mysql.php
+++ b/phpBB/includes/search/fulltext_mysql.php
@@ -41,8 +41,8 @@ class phpbb_search_fulltext_mysql extends phpbb_search_base
 	protected $config;
 	
 	/**
-	 * DBAL object
-	 * @var dbal
+	 * Database connection
+	 * @var phpbb_db_driver
 	 */
 	protected $db;
 	
@@ -353,7 +353,7 @@ class phpbb_search_fulltext_mysql extends phpbb_search_base
 	* @param	int			$per_page			number of ids each page is supposed to contain
 	* @return	boolean|int						total number of results
 	*/
-	public function keyword_search($type, $fields, $terms, $sort_by_sql, $sort_key, $sort_dir, $sort_days, $ex_fid_ary, $m_approve_fid_ary, $topic_id, $author_ary, $author_name, &$id_ary, $start, $per_page)
+	public function keyword_search($type, $fields, $terms, $sort_by_sql, $sort_key, $sort_dir, $sort_days, $ex_fid_ary, $m_approve_fid_ary, $topic_id, $author_ary, $author_name, &$id_ary, &$start, $per_page)
 	{
 		// No keywords? No posts
 		if (!$this->search_query)
@@ -375,6 +375,11 @@ class phpbb_search_fulltext_mysql extends phpbb_search_base
 			implode(',', $author_ary)
 		)));
 
+		if ($start < 0)
+		{
+			$start = 0;
+		}
+
 		// try reading the results from cache
 		$result_count = 0;
 		if ($this->obtain_ids($search_key, $result_count, $id_ary, $start, $per_page, $sort_dir) == SEARCH_RESULT_IN_CACHE)
@@ -488,16 +493,11 @@ class phpbb_search_fulltext_mysql extends phpbb_search_base
 
 		$id_ary = array_unique($id_ary);
 
-		if (!sizeof($id_ary))
-		{
-			return false;
-		}
-
 		// if the total result count is not cached yet, retrieve it from the db
 		if (!$result_count)
 		{
-			$sql = 'SELECT FOUND_ROWS() as result_count';
-			$result = $this->db->sql_query($sql);
+			$sql_found_rows = 'SELECT FOUND_ROWS() as result_count';
+			$result = $this->db->sql_query($sql_found_rows);
 			$result_count = (int) $this->db->sql_fetchfield('result_count');
 			$this->db->sql_freeresult($result);
 
@@ -507,6 +507,21 @@ class phpbb_search_fulltext_mysql extends phpbb_search_base
 			}
 		}
 
+		if ($start >= $result_count)
+		{
+			$start = floor(($result_count - 1) / $per_page) * $per_page;
+
+			$result = $this->db->sql_query_limit($sql, $this->config['search_block_size'], $start);
+
+			while ($row = $this->db->sql_fetchrow($result))
+			{
+				$id_ary[] = (int) $row[$field];
+			}
+			$this->db->sql_freeresult($result);
+
+			$id_ary = array_unique($id_ary);
+		}
+
 		// store the ids, from start on then delete anything that isn't on the current page because we only need ids for one page
 		$this->save_ids($search_key, implode(' ', $this->split_words), $author_ary, $result_count, $id_ary, $start, $sort_dir);
 		$id_ary = array_slice($id_ary, 0, (int) $per_page);
@@ -533,7 +548,7 @@ class phpbb_search_fulltext_mysql extends phpbb_search_base
 	* @param	int			$per_page			number of ids each page is supposed to contain
 	* @return	boolean|int						total number of results
 	*/
-	public function author_search($type, $firstpost_only, $sort_by_sql, $sort_key, $sort_dir, $sort_days, $ex_fid_ary, $m_approve_fid_ary, $topic_id, $author_ary, $author_name, &$id_ary, $start, $per_page)
+	public function author_search($type, $firstpost_only, $sort_by_sql, $sort_key, $sort_dir, $sort_days, $ex_fid_ary, $m_approve_fid_ary, $topic_id, $author_ary, $author_name, &$id_ary, &$start, $per_page)
 	{
 		// No author? No posts
 		if (!sizeof($author_ary))
@@ -557,6 +572,11 @@ class phpbb_search_fulltext_mysql extends phpbb_search_base
 			$author_name,
 		)));
 
+		if ($start < 0)
+		{
+			$start = 0;
+		}
+
 		// try reading the results from cache
 		$result_count = 0;
 		if ($this->obtain_ids($search_key, $result_count, $id_ary, $start, $per_page, $sort_dir) == SEARCH_RESULT_IN_CACHE)
@@ -662,8 +682,8 @@ class phpbb_search_fulltext_mysql extends phpbb_search_base
 		// retrieve the total result count if needed
 		if (!$result_count)
 		{
-			$sql = 'SELECT FOUND_ROWS() as result_count';
-			$result = $this->db->sql_query($sql);
+			$sql_found_rows = 'SELECT FOUND_ROWS() as result_count';
+			$result = $this->db->sql_query($sql_found_rows);
 			$result_count = (int) $this->db->sql_fetchfield('result_count');
 			$this->db->sql_freeresult($result);
 
@@ -673,6 +693,20 @@ class phpbb_search_fulltext_mysql extends phpbb_search_base
 			}
 		}
 
+		if ($start >= $result_count)
+		{
+			$start = floor(($result_count - 1) / $per_page) * $per_page;
+
+			$result = $this->db->sql_query_limit($sql, $this->config['search_block_size'], $start);
+			while ($row = $this->db->sql_fetchrow($result))
+			{
+				$id_ary[] = (int) $row[$field];
+			}
+			$this->db->sql_freeresult($result);
+
+			$id_ary = array_unique($id_ary);
+		}
+
 		if (sizeof($id_ary))
 		{
 			$this->save_ids($search_key, '', $author_ary, $result_count, $id_ary, $start, $sort_dir);
diff --git a/phpBB/includes/search/fulltext_native.php b/phpBB/includes/search/fulltext_native.php
index 4623326fc7..c9f33054fc 100644
--- a/phpBB/includes/search/fulltext_native.php
+++ b/phpBB/includes/search/fulltext_native.php
@@ -85,8 +85,8 @@ class phpbb_search_fulltext_native extends phpbb_search_base
 	protected $config;
 
 	/**
-	 * DBAL object
-	 * @var dbal
+	 * Database connection
+	 * @var phpbb_db_driver
 	 */
 	protected $db;
 
@@ -516,7 +516,7 @@ class phpbb_search_fulltext_native extends phpbb_search_base
 	* @param	int			$per_page			number of ids each page is supposed to contain
 	* @return	boolean|int						total number of results
 	*/
-	public function keyword_search($type, $fields, $terms, $sort_by_sql, $sort_key, $sort_dir, $sort_days, $ex_fid_ary, $m_approve_fid_ary, $topic_id, $author_ary, $author_name, &$id_ary, $start, $per_page)
+	public function keyword_search($type, $fields, $terms, $sort_by_sql, $sort_key, $sort_dir, $sort_days, $ex_fid_ary, $m_approve_fid_ary, $topic_id, $author_ary, $author_name, &$id_ary, &$start, $per_page)
 	{
 		// No keywords? No posts.
 		if (empty($this->search_query))
@@ -855,10 +855,6 @@ class phpbb_search_fulltext_native extends phpbb_search_base
 		}
 		$this->db->sql_freeresult($result);
 
-		if (!sizeof($id_ary))
-		{
-			return false;
-		}
 
 		// if we use mysql and the total result count is not cached yet, retrieve it from the db
 		if (!$total_results && $is_mysql)
@@ -867,14 +863,14 @@ class phpbb_search_fulltext_native extends phpbb_search_base
 			$sql_array_copy = $sql_array;
 			$sql_array_copy['SELECT'] = 'SQL_CALC_FOUND_ROWS p.post_id ';
 
-			$sql = $this->db->sql_build_query('SELECT', $sql_array_copy);
+			$sql_calc = $this->db->sql_build_query('SELECT', $sql_array_copy);
 			unset($sql_array_copy);
 
-			$this->db->sql_query($sql);
+			$this->db->sql_query($sql_calc);
 			$this->db->sql_freeresult($result);
 
-			$sql = 'SELECT FOUND_ROWS() as total_results';
-			$result = $this->db->sql_query($sql);
+			$sql_count = 'SELECT FOUND_ROWS() as total_results';
+			$result = $this->db->sql_query($sql_count);
 			$total_results = (int) $this->db->sql_fetchfield('total_results');
 			$this->db->sql_freeresult($result);
 
@@ -884,6 +880,20 @@ class phpbb_search_fulltext_native extends phpbb_search_base
 			}
 		}
 
+		if ($start >= $total_results)
+		{
+			$start = floor(($total_results - 1) / $per_page) * $per_page;
+
+			$result = $this->db->sql_query_limit($sql, $this->config['search_block_size'], $start);
+
+			while ($row = $this->db->sql_fetchrow($result))
+			{
+				$id_ary[] = (int) $row[(($type == 'posts') ? 'post_id' : 'topic_id')];
+			}
+			$this->db->sql_freeresult($result);
+
+		}
+
 		// store the ids, from start on then delete anything that isn't on the current page because we only need ids for one page
 		$this->save_ids($search_key, $this->search_query, $author_ary, $total_results, $id_ary, $start, $sort_dir);
 		$id_ary = array_slice($id_ary, 0, (int) $per_page);
@@ -910,7 +920,7 @@ class phpbb_search_fulltext_native extends phpbb_search_base
 	* @param	int			$per_page			number of ids each page is supposed to contain
 	* @return	boolean|int						total number of results
 	*/
-	public function author_search($type, $firstpost_only, $sort_by_sql, $sort_key, $sort_dir, $sort_days, $ex_fid_ary, $m_approve_fid_ary, $topic_id, $author_ary, $author_name, &$id_ary, $start, $per_page)
+	public function author_search($type, $firstpost_only, $sort_by_sql, $sort_key, $sort_dir, $sort_days, $ex_fid_ary, $m_approve_fid_ary, $topic_id, $author_ary, $author_name, &$id_ary, &$start, $per_page)
 	{
 		// No author? No posts
 		if (!sizeof($author_ary))
@@ -1096,13 +1106,13 @@ class phpbb_search_fulltext_native extends phpbb_search_base
 		if (!$total_results && $is_mysql)
 		{
 			// Count rows for the executed queries. Replace $select within $sql with SQL_CALC_FOUND_ROWS, and run it.
-			$sql = str_replace('SELECT ' . $select, 'SELECT DISTINCT SQL_CALC_FOUND_ROWS p.post_id', $sql);
+			$sql_calc = str_replace('SELECT ' . $select, 'SELECT DISTINCT SQL_CALC_FOUND_ROWS p.post_id', $sql);
 
-			$this->db->sql_query($sql);
+			$this->db->sql_query($sql_calc);
 			$this->db->sql_freeresult($result);
 
-			$sql = 'SELECT FOUND_ROWS() as total_results';
-			$result = $this->db->sql_query($sql);
+			$sql_count = 'SELECT FOUND_ROWS() as total_results';
+			$result = $this->db->sql_query($sql_count);
 			$total_results = (int) $this->db->sql_fetchfield('total_results');
 			$this->db->sql_freeresult($result);
 
@@ -1112,6 +1122,19 @@ class phpbb_search_fulltext_native extends phpbb_search_base
 			}
 		}
 
+		if ($start >= $total_results)
+		{
+			$start = floor(($total_results - 1) / $per_page) * $per_page;
+
+			$result = $this->db->sql_query_limit($sql, $this->config['search_block_size'], $start);
+
+			while ($row = $this->db->sql_fetchrow($result))
+			{
+				$id_ary[] = (int) $row[$field];
+			}
+			$this->db->sql_freeresult($result);
+		}
+
 		if (sizeof($id_ary))
 		{
 			$this->save_ids($search_key, '', $author_ary, $total_results, $id_ary, $start, $sort_dir);
diff --git a/phpBB/includes/search/fulltext_postgres.php b/phpBB/includes/search/fulltext_postgres.php
index 2880610655..eeb628b18f 100644
--- a/phpBB/includes/search/fulltext_postgres.php
+++ b/phpBB/includes/search/fulltext_postgres.php
@@ -66,8 +66,8 @@ class phpbb_search_fulltext_postgres extends phpbb_search_base
 	protected $config;
 
 	/**
-	 * DBAL object
-	 * @var dbal
+	 * Database connection
+	 * @var phpbb_db_driver
 	 */
 	protected $db;
 
@@ -343,7 +343,7 @@ class phpbb_search_fulltext_postgres extends phpbb_search_base
 	* @param	int			$per_page			number of ids each page is supposed to contain
 	* @return	boolean|int						total number of results
 	*/
-	public function keyword_search($type, $fields, $terms, $sort_by_sql, $sort_key, $sort_dir, $sort_days, $ex_fid_ary, $m_approve_fid_ary, $topic_id, $author_ary, $author_name, &$id_ary, $start, $per_page)
+	public function keyword_search($type, $fields, $terms, $sort_by_sql, $sort_key, $sort_dir, $sort_days, $ex_fid_ary, $m_approve_fid_ary, $topic_id, $author_ary, $author_name, &$id_ary, &$start, $per_page)
 	{
 		// No keywords? No posts
 		if (!$this->search_query)
@@ -371,6 +371,11 @@ class phpbb_search_fulltext_postgres extends phpbb_search_base
 			implode(',', $author_ary)
 		)));
 
+		if ($start < 0)
+		{
+			$start = 0;
+		}
+
 		// try reading the results from cache
 		$result_count = 0;
 		if ($this->obtain_ids($search_key, $result_count, $id_ary, $start, $per_page, $sort_dir) == SEARCH_RESULT_IN_CACHE)
@@ -476,10 +481,14 @@ class phpbb_search_fulltext_postgres extends phpbb_search_base
 			$tmp_sql_match[] = "to_tsvector ('" . $this->db->sql_escape($this->config['fulltext_postgres_ts_name']) . "', " . $sql_match_column . ") @@ to_tsquery ('" . $this->db->sql_escape($this->config['fulltext_postgres_ts_name']) . "', '" . $this->db->sql_escape($this->tsearch_query) . "')";
 		}
 
+		$this->db->sql_transaction('begin');
+
+		$sql_from = "FROM $sql_from$sql_sort_table" . POSTS_TABLE . " p";
+		$sql_where = "WHERE (" . implode(' OR ', $tmp_sql_match) . ")
+			$sql_where_options";
 		$sql = "SELECT $sql_select
-			FROM $sql_from$sql_sort_table" . POSTS_TABLE . " p
-			WHERE (" . implode(' OR ', $tmp_sql_match) . ")
-			$sql_where_options
+			$sql_from
+			$sql_where
 			ORDER BY $sql_sort";
 		$result = $this->db->sql_query_limit($sql, $this->config['search_block_size'], $start);
 
@@ -491,15 +500,15 @@ class phpbb_search_fulltext_postgres extends phpbb_search_base
 
 		$id_ary = array_unique($id_ary);
 
-		if (!sizeof($id_ary))
-		{
-			return false;
-		}
-
 		// if the total result count is not cached yet, retrieve it from the db
 		if (!$result_count)
 		{
-			$result_count = sizeof ($id_ary);
+			$sql_count = "SELECT COUNT(*) as result_count
+				$sql_from
+				$sql_where";
+			$result = $this->db->sql_query($sql_count);
+			$result_count = (int) $this->db->sql_fetchfield('result_count');
+			$this->db->sql_freeresult($result);
 
 			if (!$result_count)
 			{
@@ -507,6 +516,23 @@ class phpbb_search_fulltext_postgres extends phpbb_search_base
 			}
 		}
 
+		$this->db->sql_transaction('commit');
+
+		if ($start >= $result_count)
+		{
+			$start = floor(($result_count - 1) / $per_page) * $per_page;
+
+			$result = $this->db->sql_query_limit($sql, $this->config['search_block_size'], $start);
+
+			while ($row = $this->db->sql_fetchrow($result))
+			{
+				$id_ary[] = $row[$field];
+			}
+			$this->db->sql_freeresult($result);
+
+			$id_ary = array_unique($id_ary);
+		}
+
 		// store the ids, from start on then delete anything that isn't on the current page because we only need ids for one page
 		$this->save_ids($search_key, implode(' ', $this->split_words), $author_ary, $result_count, $id_ary, $start, $sort_dir);
 		$id_ary = array_slice($id_ary, 0, (int) $per_page);
@@ -533,7 +559,7 @@ class phpbb_search_fulltext_postgres extends phpbb_search_base
 	* @param	int			$per_page			number of ids each page is supposed to contain
 	* @return	boolean|int						total number of results
 	*/
-	public function author_search($type, $firstpost_only, $sort_by_sql, $sort_key, $sort_dir, $sort_days, $ex_fid_ary, $m_approve_fid_ary, $topic_id, $author_ary, $author_name, &$id_ary, $start, $per_page)
+	public function author_search($type, $firstpost_only, $sort_by_sql, $sort_key, $sort_dir, $sort_days, $ex_fid_ary, $m_approve_fid_ary, $topic_id, $author_ary, $author_name, &$id_ary, &$start, $per_page)
 	{
 		// No author? No posts
 		if (!sizeof($author_ary))
@@ -557,6 +583,11 @@ class phpbb_search_fulltext_postgres extends phpbb_search_base
 			$author_name,
 		)));
 
+		if ($start < 0)
+		{
+			$start = 0;
+		}
+
 		// try reading the results from cache
 		$result_count = 0;
 		if ($this->obtain_ids($search_key, $result_count, $id_ary, $start, $per_page, $sort_dir) == SEARCH_RESULT_IN_CACHE)
@@ -647,6 +678,8 @@ class phpbb_search_fulltext_postgres extends phpbb_search_base
 			$field = 'topic_id';
 		}
 
+		$this->db->sql_transaction('begin');
+
 		// Only read one block of posts from the db and then cache it
 		$result = $this->db->sql_query_limit($sql, $this->config['search_block_size'], $start);
 
@@ -659,7 +692,35 @@ class phpbb_search_fulltext_postgres extends phpbb_search_base
 		// retrieve the total result count if needed
 		if (!$result_count)
 		{
-			$result_count = sizeof ($id_ary);
+			if ($type == 'posts')
+			{
+				$sql_count = "SELECT COUNT(*) as result_count
+					FROM " . $sql_sort_table . POSTS_TABLE . ' p' . (($firstpost_only) ? ', ' . TOPICS_TABLE . ' t ' : ' ') . "
+					WHERE $sql_author
+						$sql_topic_id
+						$sql_firstpost
+						$m_approve_fid_sql
+						$sql_fora
+						$sql_sort_join
+						$sql_time";
+			}
+			else
+			{
+				$sql_count = "SELECT COUNT(*) as result_count
+					FROM " . $sql_sort_table . TOPICS_TABLE . ' t, ' . POSTS_TABLE . " p
+					WHERE $sql_author
+						$sql_topic_id
+						$sql_firstpost
+						$m_approve_fid_sql
+						$sql_fora
+						AND t.topic_id = p.topic_id
+						$sql_sort_join
+						$sql_time
+					GROUP BY t.topic_id, $sort_by_sql[$sort_key]";
+			}
+
+			$result = $this->db->sql_query($sql_count);
+			$result_count = (int) $this->db->sql_fetchfield('result_count');
 
 			if (!$result_count)
 			{
@@ -667,6 +728,22 @@ class phpbb_search_fulltext_postgres extends phpbb_search_base
 			}
 		}
 
+		$this->db->sql_transaction('commit');
+
+		if ($start >= $result_count)
+		{
+			$start = floor(($result_count - 1) / $per_page) * $per_page;
+
+			$result = $this->db->sql_query_limit($sql, $this->config['search_block_size'], $start);
+			while ($row = $this->db->sql_fetchrow($result))
+			{
+				$id_ary[] = (int) $row[$field];
+			}
+			$this->db->sql_freeresult($result);
+
+			$id_ary = array_unique($id_ary);
+		}
+
 		if (sizeof($id_ary))
 		{
 			$this->save_ids($search_key, '', $author_ary, $result_count, $id_ary, $start, $sort_dir);
diff --git a/phpBB/includes/search/fulltext_sphinx.php b/phpBB/includes/search/fulltext_sphinx.php
index dd5634b623..48445d0794 100644
--- a/phpBB/includes/search/fulltext_sphinx.php
+++ b/phpBB/includes/search/fulltext_sphinx.php
@@ -84,8 +84,8 @@ class phpbb_search_fulltext_sphinx
 	protected $config;
 
 	/**
-	 * DBAL object
-	 * @var dbal
+	 * Database connection
+	 * @var phpbb_db_driver
 	 */
 	protected $db;
 
@@ -454,7 +454,7 @@ class phpbb_search_fulltext_sphinx
 	* @param	int			$per_page			number of ids each page is supposed to contain
 	* @return	boolean|int						total number of results
 	*/
-	public function keyword_search($type, $fields, $terms, $sort_by_sql, $sort_key, $sort_dir, $sort_days, $ex_fid_ary, $m_approve_fid_ary, $topic_id, $author_ary, $author_name, &$id_ary, $start, $per_page)
+	public function keyword_search($type, $fields, $terms, $sort_by_sql, $sort_key, $sort_dir, $sort_days, $ex_fid_ary, $m_approve_fid_ary, $topic_id, $author_ary, $author_name, &$id_ary, &$start, $per_page)
 	{
 		// No keywords? No posts.
 		if (!strlen($this->search_query) && !sizeof($author_ary))
@@ -609,6 +609,25 @@ class phpbb_search_fulltext_sphinx
 			}
 		}
 
+		$result_count = $result['total_found'];
+
+		if ($start >= $result_count)
+		{
+			$start = floor(($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);
+
+			// Could be connection to localhost:9312 failed (errno=111,
+			// msg=Connection refused) during rotate, retry if so
+			$retries = SPHINX_CONNECT_RETRIES;
+			while (!$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);
+			}
+		}
+
 		$id_ary = array();
 		if (isset($result['matches']))
 		{
@@ -629,8 +648,6 @@ class phpbb_search_fulltext_sphinx
 			return false;
 		}
 
-		$result_count = $result['total_found'];
-
 		$id_ary = array_slice($id_ary, 0, (int) $per_page);
 
 		return $result_count;
@@ -875,11 +892,11 @@ class phpbb_search_fulltext_sphinx
 		</dl>
 		<dl>
 			<dt><label for="fulltext_sphinx_indexer_mem_limit">' . $this->user->lang['FULLTEXT_SPHINX_INDEXER_MEM_LIMIT'] . $this->user->lang['COLON'] . '</label><br /><span>' . $this->user->lang['FULLTEXT_SPHINX_INDEXER_MEM_LIMIT_EXPLAIN'] . '</span></dt>
-			<dd><input id="fulltext_sphinx_indexer_mem_limit" type="text" size="4" maxlength="10" name="config[fulltext_sphinx_indexer_mem_limit]" value="' . $this->config['fulltext_sphinx_indexer_mem_limit'] . '" />' . $this->user->lang['MIB'] . '</dd>
+			<dd><input id="fulltext_sphinx_indexer_mem_limit" type="text" size="4" maxlength="10" name="config[fulltext_sphinx_indexer_mem_limit]" value="' . $this->config['fulltext_sphinx_indexer_mem_limit'] . '" /> ' . $this->user->lang['MIB'] . '</dd>
 		</dl>
 		<dl>
-			<dt><label for="fulltext_sphinx_config_file">' . $this->user->lang['FULLTEXT_SPHINX_CONFIG_FILE'] . $this->user->lang['COLON'] . '</label><br /><span>' . $this->user->lang['FULLTEXT_SPHINX_CONFIG_FILE_EXPLAIN'] . '</dt>
-			<dd>' . (($this->config_generate()) ? '<textarea readonly="readonly" rows="6">' . $this->config_file_data . '</textarea>' : $this->config_file_data) . '</dd>
+			<dt><label for="fulltext_sphinx_config_file">' . $this->user->lang['FULLTEXT_SPHINX_CONFIG_FILE'] . $this->user->lang['COLON'] . '</label><br /><span>' . $this->user->lang['FULLTEXT_SPHINX_CONFIG_FILE_EXPLAIN'] . '</span></dt>
+			<dd>' . (($this->config_generate()) ? '<textarea readonly="readonly" rows="6" id="sphinx_config_data">' . htmlspecialchars($this->config_file_data) . '</textarea>' : $this->config_file_data) . '</dd>
 		<dl>
 		';
 
diff --git a/phpBB/includes/session.php b/phpBB/includes/session.php
index ee8a4094c7..6bc71da0c1 100644
--- a/phpBB/includes/session.php
+++ b/phpBB/includes/session.php
@@ -346,7 +346,7 @@ class phpbb_session
 		$session_id = $request->variable('sid', '');
 		if (defined('NEED_SID') && (empty($session_id) || $this->session_id !== $session_id))
 		{
-			send_status_line(401, 'Not authorized');
+			send_status_line(401, 'Unauthorized');
 			redirect(append_sid("{$phpbb_root_path}index.$phpEx"));
 		}
 
diff --git a/phpBB/includes/sphinxapi.php b/phpBB/includes/sphinxapi.php
index bd83b1d2e0..6c3b66710c 100644
--- a/phpBB/includes/sphinxapi.php
+++ b/phpBB/includes/sphinxapi.php
@@ -1,1712 +1,1712 @@
-<?php
-
-//
-// $Id: sphinxapi.php 3087 2012-01-30 23:07:35Z shodan $
-//
-
-//
-// Copyright (c) 2001-2012, Andrew Aksyonoff
-// Copyright (c) 2008-2012, Sphinx Technologies Inc
-// All rights reserved
-//
-// This program is free software; you can redistribute it and/or modify
-// it under the terms of the GNU General Public License. You should have
-// received a copy of the GPL license along with this program; if you
-// did not, you can find it at http://www.gnu.org/
-//
-
-/////////////////////////////////////////////////////////////////////////////
-// PHP version of Sphinx searchd client (PHP API)
-/////////////////////////////////////////////////////////////////////////////
-
-/// known searchd commands
-define ( "SEARCHD_COMMAND_SEARCH",		0 );
-define ( "SEARCHD_COMMAND_EXCERPT",		1 );
-define ( "SEARCHD_COMMAND_UPDATE",		2 );
-define ( "SEARCHD_COMMAND_KEYWORDS",	3 );
-define ( "SEARCHD_COMMAND_PERSIST",		4 );
-define ( "SEARCHD_COMMAND_STATUS",		5 );
-define ( "SEARCHD_COMMAND_FLUSHATTRS",	7 );
-
-/// current client-side command implementation versions
-define ( "VER_COMMAND_SEARCH",		0x119 );
-define ( "VER_COMMAND_EXCERPT",		0x104 );
-define ( "VER_COMMAND_UPDATE",		0x102 );
-define ( "VER_COMMAND_KEYWORDS",	0x100 );
-define ( "VER_COMMAND_STATUS",		0x100 );
-define ( "VER_COMMAND_QUERY",		0x100 );
-define ( "VER_COMMAND_FLUSHATTRS",	0x100 );
-
-/// known searchd status codes
-define ( "SEARCHD_OK",				0 );
-define ( "SEARCHD_ERROR",			1 );
-define ( "SEARCHD_RETRY",			2 );
-define ( "SEARCHD_WARNING",			3 );
-
-/// known match modes
-define ( "SPH_MATCH_ALL",			0 );
-define ( "SPH_MATCH_ANY",			1 );
-define ( "SPH_MATCH_PHRASE",		2 );
-define ( "SPH_MATCH_BOOLEAN",		3 );
-define ( "SPH_MATCH_EXTENDED",		4 );
-define ( "SPH_MATCH_FULLSCAN",		5 );
-define ( "SPH_MATCH_EXTENDED2",		6 );	// extended engine V2 (TEMPORARY, WILL BE REMOVED)
-
-/// known ranking modes (ext2 only)
-define ( "SPH_RANK_PROXIMITY_BM25",	0 );	///< default mode, phrase proximity major factor and BM25 minor one
-define ( "SPH_RANK_BM25",			1 );	///< statistical mode, BM25 ranking only (faster but worse quality)
-define ( "SPH_RANK_NONE",			2 );	///< no ranking, all matches get a weight of 1
-define ( "SPH_RANK_WORDCOUNT",		3 );	///< simple word-count weighting, rank is a weighted sum of per-field keyword occurence counts
-define ( "SPH_RANK_PROXIMITY",		4 );
-define ( "SPH_RANK_MATCHANY",		5 );
-define ( "SPH_RANK_FIELDMASK",		6 );
-define ( "SPH_RANK_SPH04",			7 );
-define ( "SPH_RANK_EXPR",			8 );
-define ( "SPH_RANK_TOTAL",			9 );
-
-/// known sort modes
-define ( "SPH_SORT_RELEVANCE",		0 );
-define ( "SPH_SORT_ATTR_DESC",		1 );
-define ( "SPH_SORT_ATTR_ASC",		2 );
-define ( "SPH_SORT_TIME_SEGMENTS", 	3 );
-define ( "SPH_SORT_EXTENDED", 		4 );
-define ( "SPH_SORT_EXPR", 			5 );
-
-/// known filter types
-define ( "SPH_FILTER_VALUES",		0 );
-define ( "SPH_FILTER_RANGE",		1 );
-define ( "SPH_FILTER_FLOATRANGE",	2 );
-
-/// known attribute types
-define ( "SPH_ATTR_INTEGER",		1 );
-define ( "SPH_ATTR_TIMESTAMP",		2 );
-define ( "SPH_ATTR_ORDINAL",		3 );
-define ( "SPH_ATTR_BOOL",			4 );
-define ( "SPH_ATTR_FLOAT",			5 );
-define ( "SPH_ATTR_BIGINT",			6 );
-define ( "SPH_ATTR_STRING",			7 );
-define ( "SPH_ATTR_MULTI",			0x40000001 );
-define ( "SPH_ATTR_MULTI64",			0x40000002 );
-
-/// known grouping functions
-define ( "SPH_GROUPBY_DAY",			0 );
-define ( "SPH_GROUPBY_WEEK",		1 );
-define ( "SPH_GROUPBY_MONTH",		2 );
-define ( "SPH_GROUPBY_YEAR",		3 );
-define ( "SPH_GROUPBY_ATTR",		4 );
-define ( "SPH_GROUPBY_ATTRPAIR",	5 );
-
-// important properties of PHP's integers:
-//  - always signed (one bit short of PHP_INT_SIZE)
-//  - conversion from string to int is saturated
-//  - float is double
-//  - div converts arguments to floats
-//  - mod converts arguments to ints
-
-// the packing code below works as follows:
-//  - when we got an int, just pack it
-//    if performance is a problem, this is the branch users should aim for
-//
-//  - otherwise, we got a number in string form
-//    this might be due to different reasons, but we assume that this is
-//    because it didn't fit into PHP int
-//
-//  - factor the string into high and low ints for packing
-//    - if we have bcmath, then it is used
-//    - if we don't, we have to do it manually (this is the fun part)
-//
-//    - x64 branch does factoring using ints
-//    - x32 (ab)uses floats, since we can't fit unsigned 32-bit number into an int
-//
-// unpacking routines are pretty much the same.
-//  - return ints if we can
-//  - otherwise format number into a string
-
-/// pack 64-bit signed
-function sphPackI64 ( $v )
-{
-	assert ( is_numeric($v) );
-	
-	// x64
-	if ( PHP_INT_SIZE>=8 )
-	{
-		$v = (int)$v;
-		return pack ( "NN", $v>>32, $v&0xFFFFFFFF );
-	}
-
-	// x32, int
-	if ( is_int($v) )
-		return pack ( "NN", $v < 0 ? -1 : 0, $v );
-
-	// x32, bcmath	
-	if ( function_exists("bcmul") )
-	{
-		if ( bccomp ( $v, 0 ) == -1 )
-			$v = bcadd ( "18446744073709551616", $v );
-		$h = bcdiv ( $v, "4294967296", 0 );
-		$l = bcmod ( $v, "4294967296" );
-		return pack ( "NN", (float)$h, (float)$l ); // conversion to float is intentional; int would lose 31st bit
-	}
-
-	// x32, no-bcmath
-	$p = max(0, strlen($v) - 13);
-	$lo = abs((float)substr($v, $p));
-	$hi = abs((float)substr($v, 0, $p));
-
-	$m = $lo + $hi*1316134912.0; // (10 ^ 13) % (1 << 32) = 1316134912
-	$q = floor($m/4294967296.0);
-	$l = $m - ($q*4294967296.0);
-	$h = $hi*2328.0 + $q; // (10 ^ 13) / (1 << 32) = 2328
-
-	if ( $v<0 )
-	{
-		if ( $l==0 )
-			$h = 4294967296.0 - $h;
-		else
-		{
-			$h = 4294967295.0 - $h;
-			$l = 4294967296.0 - $l;
-		}
-	}
-	return pack ( "NN", $h, $l );
-}
-
-/// pack 64-bit unsigned
-function sphPackU64 ( $v )
-{
-	assert ( is_numeric($v) );
-	
-	// x64
-	if ( PHP_INT_SIZE>=8 )
-	{
-		assert ( $v>=0 );
-		
-		// x64, int
-		if ( is_int($v) )
-			return pack ( "NN", $v>>32, $v&0xFFFFFFFF );
-						  
-		// x64, bcmath
-		if ( function_exists("bcmul") )
-		{
-			$h = bcdiv ( $v, 4294967296, 0 );
-			$l = bcmod ( $v, 4294967296 );
-			return pack ( "NN", $h, $l );
-		}
-		
-		// x64, no-bcmath
-		$p = max ( 0, strlen($v) - 13 );
-		$lo = (int)substr ( $v, $p );
-		$hi = (int)substr ( $v, 0, $p );
-	
-		$m = $lo + $hi*1316134912;
-		$l = $m % 4294967296;
-		$h = $hi*2328 + (int)($m/4294967296);
-
-		return pack ( "NN", $h, $l );
-	}
-
-	// x32, int
-	if ( is_int($v) )
-		return pack ( "NN", 0, $v );
-	
-	// x32, bcmath
-	if ( function_exists("bcmul") )
-	{
-		$h = bcdiv ( $v, "4294967296", 0 );
-		$l = bcmod ( $v, "4294967296" );
-		return pack ( "NN", (float)$h, (float)$l ); // conversion to float is intentional; int would lose 31st bit
-	}
-
-	// x32, no-bcmath
-	$p = max(0, strlen($v) - 13);
-	$lo = (float)substr($v, $p);
-	$hi = (float)substr($v, 0, $p);
-	
-	$m = $lo + $hi*1316134912.0;
-	$q = floor($m / 4294967296.0);
-	$l = $m - ($q * 4294967296.0);
-	$h = $hi*2328.0 + $q;
-
-	return pack ( "NN", $h, $l );
-}
-
-// unpack 64-bit unsigned
-function sphUnpackU64 ( $v )
-{
-	list ( $hi, $lo ) = array_values ( unpack ( "N*N*", $v ) );
-
-	if ( PHP_INT_SIZE>=8 )
-	{
-		if ( $hi<0 ) $hi += (1<<32); // because php 5.2.2 to 5.2.5 is totally fucked up again
-		if ( $lo<0 ) $lo += (1<<32);
-
-		// x64, int
-		if ( $hi<=2147483647 )
-			return ($hi<<32) + $lo;
-
-		// x64, bcmath
-		if ( function_exists("bcmul") )
-			return bcadd ( $lo, bcmul ( $hi, "4294967296" ) );
-
-		// x64, no-bcmath
-		$C = 100000;
-		$h = ((int)($hi / $C) << 32) + (int)($lo / $C);
-		$l = (($hi % $C) << 32) + ($lo % $C);
-		if ( $l>$C )
-		{
-			$h += (int)($l / $C);
-			$l  = $l % $C;
-		}
-
-		if ( $h==0 )
-			return $l;
-		return sprintf ( "%d%05d", $h, $l );
-	}
-
-	// x32, int
-	if ( $hi==0 )
-	{
-		if ( $lo>0 )
-			return $lo;
-		return sprintf ( "%u", $lo );
-	}
-
-	$hi = sprintf ( "%u", $hi );
-	$lo = sprintf ( "%u", $lo );
-
-	// x32, bcmath
-	if ( function_exists("bcmul") )
-		return bcadd ( $lo, bcmul ( $hi, "4294967296" ) );
-	
-	// x32, no-bcmath
-	$hi = (float)$hi;
-	$lo = (float)$lo;
-	
-	$q = floor($hi/10000000.0);
-	$r = $hi - $q*10000000.0;
-	$m = $lo + $r*4967296.0;
-	$mq = floor($m/10000000.0);
-	$l = $m - $mq*10000000.0;
-	$h = $q*4294967296.0 + $r*429.0 + $mq;
-
-	$h = sprintf ( "%.0f", $h );
-	$l = sprintf ( "%07.0f", $l );
-	if ( $h=="0" )
-		return sprintf( "%.0f", (float)$l );
-	return $h . $l;
-}
-
-// unpack 64-bit signed
-function sphUnpackI64 ( $v )
-{
-	list ( $hi, $lo ) = array_values ( unpack ( "N*N*", $v ) );
-
-	// x64
-	if ( PHP_INT_SIZE>=8 )
-	{
-		if ( $hi<0 ) $hi += (1<<32); // because php 5.2.2 to 5.2.5 is totally fucked up again
-		if ( $lo<0 ) $lo += (1<<32);
-
-		return ($hi<<32) + $lo;
-	}
-
-	// x32, int
-	if ( $hi==0 )
-	{
-		if ( $lo>0 )
-			return $lo;
-		return sprintf ( "%u", $lo );
-	}
-	// x32, int
-	elseif ( $hi==-1 )
-	{
-		if ( $lo<0 )
-			return $lo;
-		return sprintf ( "%.0f", $lo - 4294967296.0 );
-	}
-	
-	$neg = "";
-	$c = 0;
-	if ( $hi<0 )
-	{
-		$hi = ~$hi;
-		$lo = ~$lo;
-		$c = 1;
-		$neg = "-";
-	}	
-
-	$hi = sprintf ( "%u", $hi );
-	$lo = sprintf ( "%u", $lo );
-
-	// x32, bcmath
-	if ( function_exists("bcmul") )
-		return $neg . bcadd ( bcadd ( $lo, bcmul ( $hi, "4294967296" ) ), $c );
-
-	// x32, no-bcmath
-	$hi = (float)$hi;
-	$lo = (float)$lo;
-	
-	$q = floor($hi/10000000.0);
-	$r = $hi - $q*10000000.0;
-	$m = $lo + $r*4967296.0;
-	$mq = floor($m/10000000.0);
-	$l = $m - $mq*10000000.0 + $c;
-	$h = $q*4294967296.0 + $r*429.0 + $mq;
-	if ( $l==10000000 )
-	{
-		$l = 0;
-		$h += 1;
-	}
-
-	$h = sprintf ( "%.0f", $h );
-	$l = sprintf ( "%07.0f", $l );
-	if ( $h=="0" )
-		return $neg . sprintf( "%.0f", (float)$l );
-	return $neg . $h . $l;
-}
-
-
-function sphFixUint ( $value )
-{
-	if ( PHP_INT_SIZE>=8 )
-	{
-		// x64 route, workaround broken unpack() in 5.2.2+
-		if ( $value<0 ) $value += (1<<32);
-		return $value;
-	}
-	else
-	{
-		// x32 route, workaround php signed/unsigned braindamage
-		return sprintf ( "%u", $value );
-	}
-}
-
-
-/// sphinx searchd client class
-class SphinxClient
-{
-	var $_host;			///< searchd host (default is "localhost")
-	var $_port;			///< searchd port (default is 9312)
-	var $_offset;		///< how many records to seek from result-set start (default is 0)
-	var $_limit;		///< how many records to return from result-set starting at offset (default is 20)
-	var $_mode;			///< query matching mode (default is SPH_MATCH_ALL)
-	var $_weights;		///< per-field weights (default is 1 for all fields)
-	var $_sort;			///< match sorting mode (default is SPH_SORT_RELEVANCE)
-	var $_sortby;		///< attribute to sort by (defualt is "")
-	var $_min_id;		///< min ID to match (default is 0, which means no limit)
-	var $_max_id;		///< max ID to match (default is 0, which means no limit)
-	var $_filters;		///< search filters
-	var $_groupby;		///< group-by attribute name
-	var $_groupfunc;	///< group-by function (to pre-process group-by attribute value with)
-	var $_groupsort;	///< group-by sorting clause (to sort groups in result set with)
-	var $_groupdistinct;///< group-by count-distinct attribute
-	var $_maxmatches;	///< max matches to retrieve
-	var $_cutoff;		///< cutoff to stop searching at (default is 0)
-	var $_retrycount;	///< distributed retries count
-	var $_retrydelay;	///< distributed retries delay
-	var $_anchor;		///< geographical anchor point
-	var $_indexweights;	///< per-index weights
-	var $_ranker;		///< ranking mode (default is SPH_RANK_PROXIMITY_BM25)
-	var $_rankexpr;		///< ranking mode expression (for SPH_RANK_EXPR)
-	var $_maxquerytime;	///< max query time, milliseconds (default is 0, do not limit)
-	var $_fieldweights;	///< per-field-name weights
-	var $_overrides;	///< per-query attribute values overrides
-	var $_select;		///< select-list (attributes or expressions, with optional aliases)
-
-	var $_error;		///< last error message
-	var $_warning;		///< last warning message
-	var $_connerror;		///< connection error vs remote error flag
-
-	var $_reqs;			///< requests array for multi-query
-	var $_mbenc;		///< stored mbstring encoding
-	var $_arrayresult;	///< whether $result["matches"] should be a hash or an array
-	var $_timeout;		///< connect timeout
-
-	/////////////////////////////////////////////////////////////////////////////
-	// common stuff
-	/////////////////////////////////////////////////////////////////////////////
-
-	/// create a new client object and fill defaults
-	function SphinxClient ()
-	{
-		// per-client-object settings
-		$this->_host		= "localhost";
-		$this->_port		= 9312;
-		$this->_path		= false;
-		$this->_socket		= false;
-
-		// per-query settings
-		$this->_offset		= 0;
-		$this->_limit		= 20;
-		$this->_mode		= SPH_MATCH_ALL;
-		$this->_weights		= array ();
-		$this->_sort		= SPH_SORT_RELEVANCE;
-		$this->_sortby		= "";
-		$this->_min_id		= 0;
-		$this->_max_id		= 0;
-		$this->_filters		= array ();
-		$this->_groupby		= "";
-		$this->_groupfunc	= SPH_GROUPBY_DAY;
-		$this->_groupsort	= "@group desc";
-		$this->_groupdistinct= "";
-		$this->_maxmatches	= 1000;
-		$this->_cutoff		= 0;
-		$this->_retrycount	= 0;
-		$this->_retrydelay	= 0;
-		$this->_anchor		= array ();
-		$this->_indexweights= array ();
-		$this->_ranker		= SPH_RANK_PROXIMITY_BM25;
-		$this->_rankexpr	= "";
-		$this->_maxquerytime= 0;
-		$this->_fieldweights= array();
-		$this->_overrides 	= array();
-		$this->_select		= "*";
-
-		$this->_error		= ""; // per-reply fields (for single-query case)
-		$this->_warning		= "";
-		$this->_connerror	= false;
-
-		$this->_reqs		= array ();	// requests storage (for multi-query case)
-		$this->_mbenc		= "";
-		$this->_arrayresult	= false;
-		$this->_timeout		= 0;
-	}
-
-	function __destruct()
-	{
-		if ( $this->_socket !== false )
-			fclose ( $this->_socket );
-	}
-
-	/// get last error message (string)
-	function GetLastError ()
-	{
-		return $this->_error;
-	}
-
-	/// get last warning message (string)
-	function GetLastWarning ()
-	{
-		return $this->_warning;
-	}
-
-	/// get last error flag (to tell network connection errors from searchd errors or broken responses)
-	function IsConnectError()
-	{
-		return $this->_connerror;
-	}
-
-	/// set searchd host name (string) and port (integer)
-	function SetServer ( $host, $port = 0 )
-	{
-		assert ( is_string($host) );
-		if ( $host[0] == '/')
-		{
-			$this->_path = 'unix://' . $host;
-			return;
-		}
-		if ( substr ( $host, 0, 7 )=="unix://" )
-		{
-			$this->_path = $host;
-			return;
-		}
-				
-		assert ( is_int($port) );
-		$this->_host = $host;
-		$this->_port = $port;
-		$this->_path = '';
-
-	}
-
-	/// set server connection timeout (0 to remove)
-	function SetConnectTimeout ( $timeout )
-	{
-		assert ( is_numeric($timeout) );
-		$this->_timeout = $timeout;
-	}
-
-
-	function _Send ( $handle, $data, $length )
-	{
-		if ( feof($handle) || fwrite ( $handle, $data, $length ) !== $length )
-		{
-			$this->_error = 'connection unexpectedly closed (timed out?)';
-			$this->_connerror = true;
-			return false;
-		}
-		return true;
-	}
-
-	/////////////////////////////////////////////////////////////////////////////
-
-	/// enter mbstring workaround mode
-	function _MBPush ()
-	{
-		$this->_mbenc = "";
-		if ( ini_get ( "mbstring.func_overload" ) & 2 )
-		{
-			$this->_mbenc = mb_internal_encoding();
-			mb_internal_encoding ( "latin1" );
-		}
-    }
-
-	/// leave mbstring workaround mode
-	function _MBPop ()
-	{
-		if ( $this->_mbenc )
-			mb_internal_encoding ( $this->_mbenc );
-	}
-
-	/// connect to searchd server
-	function _Connect ()
-	{
-		if ( $this->_socket!==false )
-		{
-			// we are in persistent connection mode, so we have a socket
-			// however, need to check whether it's still alive
-			if ( !@feof ( $this->_socket ) )
-				return $this->_socket;
-
-			// force reopen
-			$this->_socket = false;
-		}
-
-		$errno = 0;
-		$errstr = "";
-		$this->_connerror = false;
-
-		if ( $this->_path )
-		{
-			$host = $this->_path;
-			$port = 0;
-		}
-		else
-		{
-			$host = $this->_host;
-			$port = $this->_port;
-		}
-
-		if ( $this->_timeout<=0 )
-			$fp = @fsockopen ( $host, $port, $errno, $errstr );
-		else
-			$fp = @fsockopen ( $host, $port, $errno, $errstr, $this->_timeout );
-		
-		if ( !$fp )
-		{
-			if ( $this->_path )
-				$location = $this->_path;
-			else
-				$location = "{$this->_host}:{$this->_port}";
-			
-			$errstr = trim ( $errstr );
-			$this->_error = "connection to $location failed (errno=$errno, msg=$errstr)";
-			$this->_connerror = true;
-			return false;
-		}
-
-		// send my version
-		// this is a subtle part. we must do it before (!) reading back from searchd.
-		// because otherwise under some conditions (reported on FreeBSD for instance)
-		// TCP stack could throttle write-write-read pattern because of Nagle.
-		if ( !$this->_Send ( $fp, pack ( "N", 1 ), 4 ) )
-		{
-			fclose ( $fp );
-			$this->_error = "failed to send client protocol version";
-			return false;
-		}
-
-		// check version
-		list(,$v) = unpack ( "N*", fread ( $fp, 4 ) );
-		$v = (int)$v;
-		if ( $v<1 )
-		{
-			fclose ( $fp );
-			$this->_error = "expected searchd protocol version 1+, got version '$v'";
-			return false;
-		}
-
-		return $fp;
-	}
-
-	/// get and check response packet from searchd server
-	function _GetResponse ( $fp, $client_ver )
-	{
-		$response = "";
-		$len = 0;
-
-		$header = fread ( $fp, 8 );
-		if ( strlen($header)==8 )
-		{
-			list ( $status, $ver, $len ) = array_values ( unpack ( "n2a/Nb", $header ) );
-			$left = $len;
-			while ( $left>0 && !feof($fp) )
-			{
-				$chunk = fread ( $fp, min ( 8192, $left ) );
-				if ( $chunk )
-				{
-					$response .= $chunk;
-					$left -= strlen($chunk);
-				}
-			}
-		}
-		if ( $this->_socket === false )
-			fclose ( $fp );
-
-		// check response
-		$read = strlen ( $response );
-		if ( !$response || $read!=$len )
-		{
-			$this->_error = $len
-				? "failed to read searchd response (status=$status, ver=$ver, len=$len, read=$read)"
-				: "received zero-sized searchd response";
-			return false;
-		}
-
-		// check status
-		if ( $status==SEARCHD_WARNING )
-		{
-			list(,$wlen) = unpack ( "N*", substr ( $response, 0, 4 ) );
-			$this->_warning = substr ( $response, 4, $wlen );
-			return substr ( $response, 4+$wlen );
-		}
-		if ( $status==SEARCHD_ERROR )
-		{
-			$this->_error = "searchd error: " . substr ( $response, 4 );
-			return false;
-		}
-		if ( $status==SEARCHD_RETRY )
-		{
-			$this->_error = "temporary searchd error: " . substr ( $response, 4 );
-			return false;
-		}
-		if ( $status!=SEARCHD_OK )
-		{
-			$this->_error = "unknown status code '$status'";
-			return false;
-		}
-
-		// check version
-		if ( $ver<$client_ver )
-		{
-			$this->_warning = sprintf ( "searchd command v.%d.%d older than client's v.%d.%d, some options might not work",
-				$ver>>8, $ver&0xff, $client_ver>>8, $client_ver&0xff );
-		}
-
-		return $response;
-	}
-
-	/////////////////////////////////////////////////////////////////////////////
-	// searching
-	/////////////////////////////////////////////////////////////////////////////
-
-	/// set offset and count into result set,
-	/// and optionally set max-matches and cutoff limits
-	function SetLimits ( $offset, $limit, $max=0, $cutoff=0 )
-	{
-		assert ( is_int($offset) );
-		assert ( is_int($limit) );
-		assert ( $offset>=0 );
-		assert ( $limit>0 );
-		assert ( $max>=0 );
-		$this->_offset = $offset;
-		$this->_limit = $limit;
-		if ( $max>0 )
-			$this->_maxmatches = $max;
-		if ( $cutoff>0 )
-			$this->_cutoff = $cutoff;
-	}
-
-	/// set maximum query time, in milliseconds, per-index
-	/// integer, 0 means "do not limit"
-	function SetMaxQueryTime ( $max )
-	{
-		assert ( is_int($max) );
-		assert ( $max>=0 );
-		$this->_maxquerytime = $max;
-	}
-
-	/// set matching mode
-	function SetMatchMode ( $mode )
-	{
-		assert ( $mode==SPH_MATCH_ALL
-			|| $mode==SPH_MATCH_ANY
-			|| $mode==SPH_MATCH_PHRASE
-			|| $mode==SPH_MATCH_BOOLEAN
-			|| $mode==SPH_MATCH_EXTENDED
-			|| $mode==SPH_MATCH_FULLSCAN
-			|| $mode==SPH_MATCH_EXTENDED2 );
-		$this->_mode = $mode;
-	}
-
-	/// set ranking mode
-	function SetRankingMode ( $ranker, $rankexpr="" )
-	{
-		assert ( $ranker>=0 && $ranker<SPH_RANK_TOTAL );
-		assert ( is_string($rankexpr) );
-		$this->_ranker = $ranker;
-		$this->_rankexpr = $rankexpr;
-	}
-
-	/// set matches sorting mode
-	function SetSortMode ( $mode, $sortby="" )
-	{
-		assert (
-			$mode==SPH_SORT_RELEVANCE ||
-			$mode==SPH_SORT_ATTR_DESC ||
-			$mode==SPH_SORT_ATTR_ASC ||
-			$mode==SPH_SORT_TIME_SEGMENTS ||
-			$mode==SPH_SORT_EXTENDED ||
-			$mode==SPH_SORT_EXPR );
-		assert ( is_string($sortby) );
-		assert ( $mode==SPH_SORT_RELEVANCE || strlen($sortby)>0 );
-
-		$this->_sort = $mode;
-		$this->_sortby = $sortby;
-	}
-
-	/// bind per-field weights by order
-	/// DEPRECATED; use SetFieldWeights() instead
-	function SetWeights ( $weights )
-	{
-		assert ( is_array($weights) );
-		foreach ( $weights as $weight )
-			assert ( is_int($weight) );
-
-		$this->_weights = $weights;
-	}
-
-	/// bind per-field weights by name
-	function SetFieldWeights ( $weights )
-	{
-		assert ( is_array($weights) );
-		foreach ( $weights as $name=>$weight )
-		{
-			assert ( is_string($name) );
-			assert ( is_int($weight) );
-		}
-		$this->_fieldweights = $weights;
-	}
-
-	/// bind per-index weights by name
-	function SetIndexWeights ( $weights )
-	{
-		assert ( is_array($weights) );
-		foreach ( $weights as $index=>$weight )
-		{
-			assert ( is_string($index) );
-			assert ( is_int($weight) );
-		}
-		$this->_indexweights = $weights;
-	}
-
-	/// set IDs range to match
-	/// only match records if document ID is beetwen $min and $max (inclusive)
-	function SetIDRange ( $min, $max )
-	{
-		assert ( is_numeric($min) );
-		assert ( is_numeric($max) );
-		assert ( $min<=$max );
-		$this->_min_id = $min;
-		$this->_max_id = $max;
-	}
-
-	/// set values set filter
-	/// only match records where $attribute value is in given set
-	function SetFilter ( $attribute, $values, $exclude=false )
-	{
-		assert ( is_string($attribute) );
-		assert ( is_array($values) );
-		assert ( count($values) );
-
-		if ( is_array($values) && count($values) )
-		{
-			foreach ( $values as $value )
-				assert ( is_numeric($value) );
-
-			$this->_filters[] = array ( "type"=>SPH_FILTER_VALUES, "attr"=>$attribute, "exclude"=>$exclude, "values"=>$values );
-		}
-	}
-
-	/// set range filter
-	/// only match records if $attribute value is beetwen $min and $max (inclusive)
-	function SetFilterRange ( $attribute, $min, $max, $exclude=false )
-	{
-		assert ( is_string($attribute) );
-		assert ( is_numeric($min) );
-		assert ( is_numeric($max) );
-		assert ( $min<=$max );
-
-		$this->_filters[] = array ( "type"=>SPH_FILTER_RANGE, "attr"=>$attribute, "exclude"=>$exclude, "min"=>$min, "max"=>$max );
-	}
-
-	/// set float range filter
-	/// only match records if $attribute value is beetwen $min and $max (inclusive)
-	function SetFilterFloatRange ( $attribute, $min, $max, $exclude=false )
-	{
-		assert ( is_string($attribute) );
-		assert ( is_float($min) );
-		assert ( is_float($max) );
-		assert ( $min<=$max );
-
-		$this->_filters[] = array ( "type"=>SPH_FILTER_FLOATRANGE, "attr"=>$attribute, "exclude"=>$exclude, "min"=>$min, "max"=>$max );
-	}
-
-	/// setup anchor point for geosphere distance calculations
-	/// required to use @geodist in filters and sorting
-	/// latitude and longitude must be in radians
-	function SetGeoAnchor ( $attrlat, $attrlong, $lat, $long )
-	{
-		assert ( is_string($attrlat) );
-		assert ( is_string($attrlong) );
-		assert ( is_float($lat) );
-		assert ( is_float($long) );
-
-		$this->_anchor = array ( "attrlat"=>$attrlat, "attrlong"=>$attrlong, "lat"=>$lat, "long"=>$long );
-	}
-
-	/// set grouping attribute and function
-	function SetGroupBy ( $attribute, $func, $groupsort="@group desc" )
-	{
-		assert ( is_string($attribute) );
-		assert ( is_string($groupsort) );
-		assert ( $func==SPH_GROUPBY_DAY
-			|| $func==SPH_GROUPBY_WEEK
-			|| $func==SPH_GROUPBY_MONTH
-			|| $func==SPH_GROUPBY_YEAR
-			|| $func==SPH_GROUPBY_ATTR
-			|| $func==SPH_GROUPBY_ATTRPAIR );
-
-		$this->_groupby = $attribute;
-		$this->_groupfunc = $func;
-		$this->_groupsort = $groupsort;
-	}
-
-	/// set count-distinct attribute for group-by queries
-	function SetGroupDistinct ( $attribute )
-	{
-		assert ( is_string($attribute) );
-		$this->_groupdistinct = $attribute;
-	}
-
-	/// set distributed retries count and delay
-	function SetRetries ( $count, $delay=0 )
-	{
-		assert ( is_int($count) && $count>=0 );
-		assert ( is_int($delay) && $delay>=0 );
-		$this->_retrycount = $count;
-		$this->_retrydelay = $delay;
-	}
-
-	/// set result set format (hash or array; hash by default)
-	/// PHP specific; needed for group-by-MVA result sets that may contain duplicate IDs
-	function SetArrayResult ( $arrayresult )
-	{
-		assert ( is_bool($arrayresult) );
-		$this->_arrayresult = $arrayresult;
-	}
-
-	/// set attribute values override
-	/// there can be only one override per attribute
-	/// $values must be a hash that maps document IDs to attribute values
-	function SetOverride ( $attrname, $attrtype, $values )
-	{
-		assert ( is_string ( $attrname ) );
-		assert ( in_array ( $attrtype, array ( SPH_ATTR_INTEGER, SPH_ATTR_TIMESTAMP, SPH_ATTR_BOOL, SPH_ATTR_FLOAT, SPH_ATTR_BIGINT ) ) );
-		assert ( is_array ( $values ) );
-
-		$this->_overrides[$attrname] = array ( "attr"=>$attrname, "type"=>$attrtype, "values"=>$values );
-	}
-
-	/// set select-list (attributes or expressions), SQL-like syntax
-	function SetSelect ( $select )
-	{
-		assert ( is_string ( $select ) );
-		$this->_select = $select;
-	}
-
-	//////////////////////////////////////////////////////////////////////////////
-
-	/// clear all filters (for multi-queries)
-	function ResetFilters ()
-	{
-		$this->_filters = array();
-		$this->_anchor = array();
-	}
-
-	/// clear groupby settings (for multi-queries)
-	function ResetGroupBy ()
-	{
-		$this->_groupby		= "";
-		$this->_groupfunc	= SPH_GROUPBY_DAY;
-		$this->_groupsort	= "@group desc";
-		$this->_groupdistinct= "";
-	}
-
-	/// clear all attribute value overrides (for multi-queries)
-	function ResetOverrides ()
-    {
-    	$this->_overrides = array ();
-    }
-
-	//////////////////////////////////////////////////////////////////////////////
-
-	/// connect to searchd server, run given search query through given indexes,
-	/// and return the search results
-	function Query ( $query, $index="*", $comment="" )
-	{
-		assert ( empty($this->_reqs) );
-
-		$this->AddQuery ( $query, $index, $comment );
-		$results = $this->RunQueries ();
-		$this->_reqs = array (); // just in case it failed too early
-
-		if ( !is_array($results) )
-			return false; // probably network error; error message should be already filled
-
-		$this->_error = $results[0]["error"];
-		$this->_warning = $results[0]["warning"];
-		if ( $results[0]["status"]==SEARCHD_ERROR )
-			return false;
-		else
-			return $results[0];
-	}
-
-	/// helper to pack floats in network byte order
-	function _PackFloat ( $f )
-	{
-		$t1 = pack ( "f", $f ); // machine order
-		list(,$t2) = unpack ( "L*", $t1 ); // int in machine order
-		return pack ( "N", $t2 );
-	}
-
-	/// add query to multi-query batch
-	/// returns index into results array from RunQueries() call
-	function AddQuery ( $query, $index="*", $comment="" )
-	{
-		// mbstring workaround
-		$this->_MBPush ();
-
-		// build request
-		$req = pack ( "NNNN", $this->_offset, $this->_limit, $this->_mode, $this->_ranker );
-		if ( $this->_ranker==SPH_RANK_EXPR )
-			$req .= pack ( "N", strlen($this->_rankexpr) ) . $this->_rankexpr;
-		$req .= pack ( "N", $this->_sort ); // (deprecated) sort mode
-		$req .= pack ( "N", strlen($this->_sortby) ) . $this->_sortby;
-		$req .= pack ( "N", strlen($query) ) . $query; // query itself
-		$req .= pack ( "N", count($this->_weights) ); // weights
-		foreach ( $this->_weights as $weight )
-			$req .= pack ( "N", (int)$weight );
-		$req .= pack ( "N", strlen($index) ) . $index; // indexes
-		$req .= pack ( "N", 1 ); // id64 range marker
-		$req .= sphPackU64 ( $this->_min_id ) . sphPackU64 ( $this->_max_id ); // id64 range
-
-		// filters
-		$req .= pack ( "N", count($this->_filters) );
-		foreach ( $this->_filters as $filter )
-		{
-			$req .= pack ( "N", strlen($filter["attr"]) ) . $filter["attr"];
-			$req .= pack ( "N", $filter["type"] );
-			switch ( $filter["type"] )
-			{
-				case SPH_FILTER_VALUES:
-					$req .= pack ( "N", count($filter["values"]) );
-					foreach ( $filter["values"] as $value )
-						$req .= sphPackI64 ( $value );
-					break;
-
-				case SPH_FILTER_RANGE:
-					$req .= sphPackI64 ( $filter["min"] ) . sphPackI64 ( $filter["max"] );
-					break;
-
-				case SPH_FILTER_FLOATRANGE:
-					$req .= $this->_PackFloat ( $filter["min"] ) . $this->_PackFloat ( $filter["max"] );
-					break;
-
-				default:
-					assert ( 0 && "internal error: unhandled filter type" );
-			}
-			$req .= pack ( "N", $filter["exclude"] );
-		}
-
-		// group-by clause, max-matches count, group-sort clause, cutoff count
-		$req .= pack ( "NN", $this->_groupfunc, strlen($this->_groupby) ) . $this->_groupby;
-		$req .= pack ( "N", $this->_maxmatches );
-		$req .= pack ( "N", strlen($this->_groupsort) ) . $this->_groupsort;
-		$req .= pack ( "NNN", $this->_cutoff, $this->_retrycount, $this->_retrydelay );
-		$req .= pack ( "N", strlen($this->_groupdistinct) ) . $this->_groupdistinct;
-
-		// anchor point
-		if ( empty($this->_anchor) )
-		{
-			$req .= pack ( "N", 0 );
-		} else
-		{
-			$a =& $this->_anchor;
-			$req .= pack ( "N", 1 );
-			$req .= pack ( "N", strlen($a["attrlat"]) ) . $a["attrlat"];
-			$req .= pack ( "N", strlen($a["attrlong"]) ) . $a["attrlong"];
-			$req .= $this->_PackFloat ( $a["lat"] ) . $this->_PackFloat ( $a["long"] );
-		}
-
-		// per-index weights
-		$req .= pack ( "N", count($this->_indexweights) );
-		foreach ( $this->_indexweights as $idx=>$weight )
-			$req .= pack ( "N", strlen($idx) ) . $idx . pack ( "N", $weight );
-
-		// max query time
-		$req .= pack ( "N", $this->_maxquerytime );
-
-		// per-field weights
-		$req .= pack ( "N", count($this->_fieldweights) );
-		foreach ( $this->_fieldweights as $field=>$weight )
-			$req .= pack ( "N", strlen($field) ) . $field . pack ( "N", $weight );
-
-		// comment
-		$req .= pack ( "N", strlen($comment) ) . $comment;
-
-		// attribute overrides
-		$req .= pack ( "N", count($this->_overrides) );
-		foreach ( $this->_overrides as $key => $entry )
-		{
-			$req .= pack ( "N", strlen($entry["attr"]) ) . $entry["attr"];
-			$req .= pack ( "NN", $entry["type"], count($entry["values"]) );
-			foreach ( $entry["values"] as $id=>$val )
-			{
-				assert ( is_numeric($id) );
-				assert ( is_numeric($val) );
-
-				$req .= sphPackU64 ( $id );
-				switch ( $entry["type"] )
-				{
-					case SPH_ATTR_FLOAT:	$req .= $this->_PackFloat ( $val ); break;
-					case SPH_ATTR_BIGINT:	$req .= sphPackI64 ( $val ); break;
-					default:				$req .= pack ( "N", $val ); break;
-				}
-			}
-		}
-
-		// select-list
-		$req .= pack ( "N", strlen($this->_select) ) . $this->_select;
-
-		// mbstring workaround
-		$this->_MBPop ();
-
-		// store request to requests array
-		$this->_reqs[] = $req;
-		return count($this->_reqs)-1;
-	}
-
-	/// connect to searchd, run queries batch, and return an array of result sets
-	function RunQueries ()
-	{
-		if ( empty($this->_reqs) )
-		{
-			$this->_error = "no queries defined, issue AddQuery() first";
-			return false;
-		}
-
-		// mbstring workaround
-		$this->_MBPush ();
-
-		if (!( $fp = $this->_Connect() ))
-		{
-			$this->_MBPop ();
-			return false;
-		}
-
-		// send query, get response
-		$nreqs = count($this->_reqs);
-		$req = join ( "", $this->_reqs );
-		$len = 8+strlen($req);
-		$req = pack ( "nnNNN", SEARCHD_COMMAND_SEARCH, VER_COMMAND_SEARCH, $len, 0, $nreqs ) . $req; // add header
-
-		if ( !( $this->_Send ( $fp, $req, $len+8 ) ) ||
-			 !( $response = $this->_GetResponse ( $fp, VER_COMMAND_SEARCH ) ) )
-		{
-			$this->_MBPop ();
-			return false;
-		}
-
-		// query sent ok; we can reset reqs now
-		$this->_reqs = array ();
-
-		// parse and return response
-		return $this->_ParseSearchResponse ( $response, $nreqs );
-	}
-
-	/// parse and return search query (or queries) response
-	function _ParseSearchResponse ( $response, $nreqs )
-	{
-		$p = 0; // current position
-		$max = strlen($response); // max position for checks, to protect against broken responses
-
-		$results = array ();
-		for ( $ires=0; $ires<$nreqs && $p<$max; $ires++ )
-		{
-			$results[] = array();
-			$result =& $results[$ires];
-
-			$result["error"] = "";
-			$result["warning"] = "";
-
-			// extract status
-			list(,$status) = unpack ( "N*", substr ( $response, $p, 4 ) ); $p += 4;
-			$result["status"] = $status;
-			if ( $status!=SEARCHD_OK )
-			{
-				list(,$len) = unpack ( "N*", substr ( $response, $p, 4 ) ); $p += 4;
-				$message = substr ( $response, $p, $len ); $p += $len;
-
-				if ( $status==SEARCHD_WARNING )
-				{
-					$result["warning"] = $message;
-				} else
-				{
-					$result["error"] = $message;
-					continue;
-				}
-			}
-
-			// read schema
-			$fields = array ();
-			$attrs = array ();
-
-			list(,$nfields) = unpack ( "N*", substr ( $response, $p, 4 ) ); $p += 4;
-			while ( $nfields-->0 && $p<$max )
-			{
-				list(,$len) = unpack ( "N*", substr ( $response, $p, 4 ) ); $p += 4;
-				$fields[] = substr ( $response, $p, $len ); $p += $len;
-			}
-			$result["fields"] = $fields;
-
-			list(,$nattrs) = unpack ( "N*", substr ( $response, $p, 4 ) ); $p += 4;
-			while ( $nattrs-->0 && $p<$max  )
-			{
-				list(,$len) = unpack ( "N*", substr ( $response, $p, 4 ) ); $p += 4;
-				$attr = substr ( $response, $p, $len ); $p += $len;
-				list(,$type) = unpack ( "N*", substr ( $response, $p, 4 ) ); $p += 4;
-				$attrs[$attr] = $type;
-			}
-			$result["attrs"] = $attrs;
-
-			// read match count
-			list(,$count) = unpack ( "N*", substr ( $response, $p, 4 ) ); $p += 4;
-			list(,$id64) = unpack ( "N*", substr ( $response, $p, 4 ) ); $p += 4;
-
-			// read matches
-			$idx = -1;
-			while ( $count-->0 && $p<$max )
-			{
-				// index into result array
-				$idx++;
-
-				// parse document id and weight
-				if ( $id64 )
-				{
-					$doc = sphUnpackU64 ( substr ( $response, $p, 8 ) ); $p += 8;
-					list(,$weight) = unpack ( "N*", substr ( $response, $p, 4 ) ); $p += 4;
-				}
-				else
-				{
-					list ( $doc, $weight ) = array_values ( unpack ( "N*N*",
-						substr ( $response, $p, 8 ) ) );
-					$p += 8;
-					$doc = sphFixUint($doc);
-				}
-				$weight = sprintf ( "%u", $weight );
-
-				// create match entry
-				if ( $this->_arrayresult )
-					$result["matches"][$idx] = array ( "id"=>$doc, "weight"=>$weight );
-				else
-					$result["matches"][$doc]["weight"] = $weight;
-
-				// parse and create attributes
-				$attrvals = array ();
-				foreach ( $attrs as $attr=>$type )
-				{
-					// handle 64bit ints
-					if ( $type==SPH_ATTR_BIGINT )
-					{
-						$attrvals[$attr] = sphUnpackI64 ( substr ( $response, $p, 8 ) ); $p += 8;
-						continue;
-					}
-
-					// handle floats
-					if ( $type==SPH_ATTR_FLOAT )
-					{
-						list(,$uval) = unpack ( "N*", substr ( $response, $p, 4 ) ); $p += 4;
-						list(,$fval) = unpack ( "f*", pack ( "L", $uval ) ); 
-						$attrvals[$attr] = $fval;
-						continue;
-					}
-
-					// handle everything else as unsigned ints
-					list(,$val) = unpack ( "N*", substr ( $response, $p, 4 ) ); $p += 4;
-					if ( $type==SPH_ATTR_MULTI )
-					{
-						$attrvals[$attr] = array ();
-						$nvalues = $val;
-						while ( $nvalues-->0 && $p<$max )
-						{
-							list(,$val) = unpack ( "N*", substr ( $response, $p, 4 ) ); $p += 4;
-							$attrvals[$attr][] = sphFixUint($val);
-						}
-					} else if ( $type==SPH_ATTR_MULTI64 )
-					{
-						$attrvals[$attr] = array ();
-						$nvalues = $val;
-						while ( $nvalues>0 && $p<$max )
-						{
-							$attrvals[$attr][] = sphUnpackU64 ( substr ( $response, $p, 8 ) ); $p += 8;
-							$nvalues -= 2;
-						}
-					} else if ( $type==SPH_ATTR_STRING )
-					{
-						$attrvals[$attr] = substr ( $response, $p, $val );
-						$p += $val;						
-					} else
-					{
-						$attrvals[$attr] = sphFixUint($val);
-					}
-				}
-
-				if ( $this->_arrayresult )
-					$result["matches"][$idx]["attrs"] = $attrvals;
-				else
-					$result["matches"][$doc]["attrs"] = $attrvals;
-			}
-
-			list ( $total, $total_found, $msecs, $words ) =
-				array_values ( unpack ( "N*N*N*N*", substr ( $response, $p, 16 ) ) );
-			$result["total"] = sprintf ( "%u", $total );
-			$result["total_found"] = sprintf ( "%u", $total_found );
-			$result["time"] = sprintf ( "%.3f", $msecs/1000 );
-			$p += 16;
-
-			while ( $words-->0 && $p<$max )
-			{
-				list(,$len) = unpack ( "N*", substr ( $response, $p, 4 ) ); $p += 4;
-				$word = substr ( $response, $p, $len ); $p += $len;
-				list ( $docs, $hits ) = array_values ( unpack ( "N*N*", substr ( $response, $p, 8 ) ) ); $p += 8;
-				$result["words"][$word] = array (
-					"docs"=>sprintf ( "%u", $docs ),
-					"hits"=>sprintf ( "%u", $hits ) );
-			}
-		}
-
-		$this->_MBPop ();
-		return $results;
-	}
-
-	/////////////////////////////////////////////////////////////////////////////
-	// excerpts generation
-	/////////////////////////////////////////////////////////////////////////////
-
-	/// connect to searchd server, and generate exceprts (snippets)
-	/// of given documents for given query. returns false on failure,
-	/// an array of snippets on success
-	function BuildExcerpts ( $docs, $index, $words, $opts=array() )
-	{
-		assert ( is_array($docs) );
-		assert ( is_string($index) );
-		assert ( is_string($words) );
-		assert ( is_array($opts) );
-
-		$this->_MBPush ();
-
-		if (!( $fp = $this->_Connect() ))
-		{
-			$this->_MBPop();
-			return false;
-		}
-
-		/////////////////
-		// fixup options
-		/////////////////
-
-		if ( !isset($opts["before_match"]) )		$opts["before_match"] = "<b>";
-		if ( !isset($opts["after_match"]) )			$opts["after_match"] = "</b>";
-		if ( !isset($opts["chunk_separator"]) )		$opts["chunk_separator"] = " ... ";
-		if ( !isset($opts["limit"]) )				$opts["limit"] = 256;
-		if ( !isset($opts["limit_passages"]) )		$opts["limit_passages"] = 0;
-		if ( !isset($opts["limit_words"]) )			$opts["limit_words"] = 0;
-		if ( !isset($opts["around"]) )				$opts["around"] = 5;
-		if ( !isset($opts["exact_phrase"]) )		$opts["exact_phrase"] = false;
-		if ( !isset($opts["single_passage"]) )		$opts["single_passage"] = false;
-		if ( !isset($opts["use_boundaries"]) )		$opts["use_boundaries"] = false;
-		if ( !isset($opts["weight_order"]) )		$opts["weight_order"] = false;
-		if ( !isset($opts["query_mode"]) )			$opts["query_mode"] = false;
-		if ( !isset($opts["force_all_words"]) )		$opts["force_all_words"] = false;
-		if ( !isset($opts["start_passage_id"]) )	$opts["start_passage_id"] = 1;
-		if ( !isset($opts["load_files"]) )			$opts["load_files"] = false;
-		if ( !isset($opts["html_strip_mode"]) )		$opts["html_strip_mode"] = "index";
-		if ( !isset($opts["allow_empty"]) )			$opts["allow_empty"] = false;
-		if ( !isset($opts["passage_boundary"]) )	$opts["passage_boundary"] = "none";
-		if ( !isset($opts["emit_zones"]) )			$opts["emit_zones"] = false;
-		if ( !isset($opts["load_files_scattered"]) )		$opts["load_files_scattered"] = false;
-		
-
-		/////////////////
-		// build request
-		/////////////////
-
-		// v.1.2 req
-		$flags = 1; // remove spaces
-		if ( $opts["exact_phrase"] )	$flags |= 2;
-		if ( $opts["single_passage"] )	$flags |= 4;
-		if ( $opts["use_boundaries"] )	$flags |= 8;
-		if ( $opts["weight_order"] )	$flags |= 16;
-		if ( $opts["query_mode"] )		$flags |= 32;
-		if ( $opts["force_all_words"] )	$flags |= 64;
-		if ( $opts["load_files"] )		$flags |= 128;
-		if ( $opts["allow_empty"] )		$flags |= 256;
-		if ( $opts["emit_zones"] )		$flags |= 512;
-		if ( $opts["load_files_scattered"] )	$flags |= 1024;
-		$req = pack ( "NN", 0, $flags ); // mode=0, flags=$flags
-		$req .= pack ( "N", strlen($index) ) . $index; // req index
-		$req .= pack ( "N", strlen($words) ) . $words; // req words
-
-		// options
-		$req .= pack ( "N", strlen($opts["before_match"]) ) . $opts["before_match"];
-		$req .= pack ( "N", strlen($opts["after_match"]) ) . $opts["after_match"];
-		$req .= pack ( "N", strlen($opts["chunk_separator"]) ) . $opts["chunk_separator"];
-		$req .= pack ( "NN", (int)$opts["limit"], (int)$opts["around"] );
-		$req .= pack ( "NNN", (int)$opts["limit_passages"], (int)$opts["limit_words"], (int)$opts["start_passage_id"] ); // v.1.2
-		$req .= pack ( "N", strlen($opts["html_strip_mode"]) ) . $opts["html_strip_mode"];
-		$req .= pack ( "N", strlen($opts["passage_boundary"]) ) . $opts["passage_boundary"];
-
-		// documents
-		$req .= pack ( "N", count($docs) );
-		foreach ( $docs as $doc )
-		{
-			assert ( is_string($doc) );
-			$req .= pack ( "N", strlen($doc) ) . $doc;
-		}
-
-		////////////////////////////
-		// send query, get response
-		////////////////////////////
-
-		$len = strlen($req);
-		$req = pack ( "nnN", SEARCHD_COMMAND_EXCERPT, VER_COMMAND_EXCERPT, $len ) . $req; // add header
-		if ( !( $this->_Send ( $fp, $req, $len+8 ) ) ||
-			 !( $response = $this->_GetResponse ( $fp, VER_COMMAND_EXCERPT ) ) )
-		{
-			$this->_MBPop ();
-			return false;
-		}
-
-		//////////////////
-		// parse response
-		//////////////////
-
-		$pos = 0;
-		$res = array ();
-		$rlen = strlen($response);
-		for ( $i=0; $i<count($docs); $i++ )
-		{
-			list(,$len) = unpack ( "N*", substr ( $response, $pos, 4 ) );
-			$pos += 4;
-
-			if ( $pos+$len > $rlen )
-			{
-				$this->_error = "incomplete reply";
-				$this->_MBPop ();
-				return false;
-			}
-			$res[] = $len ? substr ( $response, $pos, $len ) : "";
-			$pos += $len;
-		}
-
-		$this->_MBPop ();
-		return $res;
-	}
-
-
-	/////////////////////////////////////////////////////////////////////////////
-	// keyword generation
-	/////////////////////////////////////////////////////////////////////////////
-
-	/// connect to searchd server, and generate keyword list for a given query
-	/// returns false on failure,
-	/// an array of words on success
-	function BuildKeywords ( $query, $index, $hits )
-	{
-		assert ( is_string($query) );
-		assert ( is_string($index) );
-		assert ( is_bool($hits) );
-
-		$this->_MBPush ();
-
-		if (!( $fp = $this->_Connect() ))
-		{
-			$this->_MBPop();
-			return false;
-		}
-
-		/////////////////
-		// build request
-		/////////////////
-
-		// v.1.0 req
-		$req  = pack ( "N", strlen($query) ) . $query; // req query
-		$req .= pack ( "N", strlen($index) ) . $index; // req index
-		$req .= pack ( "N", (int)$hits );
-
-		////////////////////////////
-		// send query, get response
-		////////////////////////////
-
-		$len = strlen($req);
-		$req = pack ( "nnN", SEARCHD_COMMAND_KEYWORDS, VER_COMMAND_KEYWORDS, $len ) . $req; // add header
-		if ( !( $this->_Send ( $fp, $req, $len+8 ) ) ||
-			 !( $response = $this->_GetResponse ( $fp, VER_COMMAND_KEYWORDS ) ) )
-		{
-			$this->_MBPop ();
-			return false;
-		}
-
-		//////////////////
-		// parse response
-		//////////////////
-
-		$pos = 0;
-		$res = array ();
-		$rlen = strlen($response);
-		list(,$nwords) = unpack ( "N*", substr ( $response, $pos, 4 ) );
-		$pos += 4;
-		for ( $i=0; $i<$nwords; $i++ )
-		{
-			list(,$len) = unpack ( "N*", substr ( $response, $pos, 4 ) );	$pos += 4;
-			$tokenized = $len ? substr ( $response, $pos, $len ) : "";
-			$pos += $len;
-
-			list(,$len) = unpack ( "N*", substr ( $response, $pos, 4 ) );	$pos += 4;
-			$normalized = $len ? substr ( $response, $pos, $len ) : "";
-			$pos += $len;
-
-			$res[] = array ( "tokenized"=>$tokenized, "normalized"=>$normalized );
-
-			if ( $hits )
-			{
-				list($ndocs,$nhits) = array_values ( unpack ( "N*N*", substr ( $response, $pos, 8 ) ) );
-				$pos += 8;
-				$res [$i]["docs"] = $ndocs;
-				$res [$i]["hits"] = $nhits;
-			}
-
-			if ( $pos > $rlen )
-			{
-				$this->_error = "incomplete reply";
-				$this->_MBPop ();
-				return false;
-			}
-		}
-
-		$this->_MBPop ();
-		return $res;
-	}
-
-	function EscapeString ( $string )
-	{
-		$from = array ( '\\', '(',')','|','-','!','@','~','"','&', '/', '^', '$', '=' );
-		$to   = array ( '\\\\', '\(','\)','\|','\-','\!','\@','\~','\"', '\&', '\/', '\^', '\$', '\=' );
-
-		return str_replace ( $from, $to, $string );
-	}
-
-	/////////////////////////////////////////////////////////////////////////////
-	// attribute updates
-	/////////////////////////////////////////////////////////////////////////////
-
-	/// batch update given attributes in given rows in given indexes
-	/// returns amount of updated documents (0 or more) on success, or -1 on failure
-	function UpdateAttributes ( $index, $attrs, $values, $mva=false )
-	{
-		// verify everything
-		assert ( is_string($index) );
-		assert ( is_bool($mva) );
-
-		assert ( is_array($attrs) );
-		foreach ( $attrs as $attr )
-			assert ( is_string($attr) );
-
-		assert ( is_array($values) );
-		foreach ( $values as $id=>$entry )
-		{
-			assert ( is_numeric($id) );
-			assert ( is_array($entry) );
-			assert ( count($entry)==count($attrs) );
-			foreach ( $entry as $v )
-			{
-				if ( $mva )
-				{
-					assert ( is_array($v) );
-					foreach ( $v as $vv )
-						assert ( is_int($vv) );
-				} else
-					assert ( is_int($v) );
-			}
-		}
-
-		// build request
-		$this->_MBPush ();
-		$req = pack ( "N", strlen($index) ) . $index;
-
-		$req .= pack ( "N", count($attrs) );
-		foreach ( $attrs as $attr )
-		{
-			$req .= pack ( "N", strlen($attr) ) . $attr;
-			$req .= pack ( "N", $mva ? 1 : 0 );
-		}
-
-		$req .= pack ( "N", count($values) );
-		foreach ( $values as $id=>$entry )
-		{
-			$req .= sphPackU64 ( $id );
-			foreach ( $entry as $v )
-			{
-				$req .= pack ( "N", $mva ? count($v) : $v );
-				if ( $mva )
-					foreach ( $v as $vv )
-						$req .= pack ( "N", $vv );
-			}
-		}
-
-		// connect, send query, get response
-		if (!( $fp = $this->_Connect() ))
-		{
-			$this->_MBPop ();
-			return -1;
-		}
-
-		$len = strlen($req);
-		$req = pack ( "nnN", SEARCHD_COMMAND_UPDATE, VER_COMMAND_UPDATE, $len ) . $req; // add header
-		if ( !$this->_Send ( $fp, $req, $len+8 ) )
-		{
-			$this->_MBPop ();
-			return -1;
-		}
-
-		if (!( $response = $this->_GetResponse ( $fp, VER_COMMAND_UPDATE ) ))
-		{
-			$this->_MBPop ();
-			return -1;
-		}
-
-		// parse response
-		list(,$updated) = unpack ( "N*", substr ( $response, 0, 4 ) );
-		$this->_MBPop ();
-		return $updated;
-	}
-
-	/////////////////////////////////////////////////////////////////////////////
-	// persistent connections
-	/////////////////////////////////////////////////////////////////////////////
-
-	function Open()
-	{
-		if ( $this->_socket !== false )
-		{
-			$this->_error = 'already connected';
-			return false;
-		}
-		if ( !$fp = $this->_Connect() )
-			return false;
-
-		// command, command version = 0, body length = 4, body = 1
-		$req = pack ( "nnNN", SEARCHD_COMMAND_PERSIST, 0, 4, 1 );
-		if ( !$this->_Send ( $fp, $req, 12 ) )
-			return false;
-
-		$this->_socket = $fp;
-		return true;
-	}
-
-	function Close()
-	{
-		if ( $this->_socket === false )
-		{
-			$this->_error = 'not connected';
-			return false;
-		}
-
-		fclose ( $this->_socket );
-		$this->_socket = false;
-		
-		return true;
-	}
-
-	//////////////////////////////////////////////////////////////////////////
-	// status
-	//////////////////////////////////////////////////////////////////////////
-
-	function Status ()
-	{
-		$this->_MBPush ();
-		if (!( $fp = $this->_Connect() ))
-		{
-			$this->_MBPop();
-			return false;
-		}
-
-		$req = pack ( "nnNN", SEARCHD_COMMAND_STATUS, VER_COMMAND_STATUS, 4, 1 ); // len=4, body=1
-		if ( !( $this->_Send ( $fp, $req, 12 ) ) ||
-			 !( $response = $this->_GetResponse ( $fp, VER_COMMAND_STATUS ) ) )
-		{
-			$this->_MBPop ();
-			return false;
-		}
-
-		$res = substr ( $response, 4 ); // just ignore length, error handling, etc
-		$p = 0;
-		list ( $rows, $cols ) = array_values ( unpack ( "N*N*", substr ( $response, $p, 8 ) ) ); $p += 8;
-
-		$res = array();
-		for ( $i=0; $i<$rows; $i++ )
-			for ( $j=0; $j<$cols; $j++ )
-		{
-			list(,$len) = unpack ( "N*", substr ( $response, $p, 4 ) ); $p += 4;
-			$res[$i][] = substr ( $response, $p, $len ); $p += $len;
-		}
-
-		$this->_MBPop ();
-		return $res;
-	}
-
-	//////////////////////////////////////////////////////////////////////////
-	// flush
-	//////////////////////////////////////////////////////////////////////////
-
-	function FlushAttributes ()
-	{
-		$this->_MBPush ();
-		if (!( $fp = $this->_Connect() ))
-		{
-			$this->_MBPop();
-			return -1;
-		}
-
-		$req = pack ( "nnN", SEARCHD_COMMAND_FLUSHATTRS, VER_COMMAND_FLUSHATTRS, 0 ); // len=0
-		if ( !( $this->_Send ( $fp, $req, 8 ) ) ||
-			 !( $response = $this->_GetResponse ( $fp, VER_COMMAND_FLUSHATTRS ) ) )
-		{
-			$this->_MBPop ();
-			return -1;
-		}
-
-		$tag = -1;
-		if ( strlen($response)==4 )
-			list(,$tag) = unpack ( "N*", $response );
-		else
-			$this->_error = "unexpected response length";
-
-		$this->_MBPop ();
-		return $tag;
-	}
-}
-
-//
-// $Id: sphinxapi.php 3087 2012-01-30 23:07:35Z shodan $
-//
+<?php
+
+//
+// $Id: sphinxapi.php 3087 2012-01-30 23:07:35Z shodan $
+//
+
+//
+// Copyright (c) 2001-2012, Andrew Aksyonoff
+// Copyright (c) 2008-2012, Sphinx Technologies Inc
+// All rights reserved
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License. You should have
+// received a copy of the GPL license along with this program; if you
+// did not, you can find it at http://www.gnu.org/
+//
+
+/////////////////////////////////////////////////////////////////////////////
+// PHP version of Sphinx searchd client (PHP API)
+/////////////////////////////////////////////////////////////////////////////
+
+/// known searchd commands
+define ( "SEARCHD_COMMAND_SEARCH",		0 );
+define ( "SEARCHD_COMMAND_EXCERPT",		1 );
+define ( "SEARCHD_COMMAND_UPDATE",		2 );
+define ( "SEARCHD_COMMAND_KEYWORDS",	3 );
+define ( "SEARCHD_COMMAND_PERSIST",		4 );
+define ( "SEARCHD_COMMAND_STATUS",		5 );
+define ( "SEARCHD_COMMAND_FLUSHATTRS",	7 );
+
+/// current client-side command implementation versions
+define ( "VER_COMMAND_SEARCH",		0x119 );
+define ( "VER_COMMAND_EXCERPT",		0x104 );
+define ( "VER_COMMAND_UPDATE",		0x102 );
+define ( "VER_COMMAND_KEYWORDS",	0x100 );
+define ( "VER_COMMAND_STATUS",		0x100 );
+define ( "VER_COMMAND_QUERY",		0x100 );
+define ( "VER_COMMAND_FLUSHATTRS",	0x100 );
+
+/// known searchd status codes
+define ( "SEARCHD_OK",				0 );
+define ( "SEARCHD_ERROR",			1 );
+define ( "SEARCHD_RETRY",			2 );
+define ( "SEARCHD_WARNING",			3 );
+
+/// known match modes
+define ( "SPH_MATCH_ALL",			0 );
+define ( "SPH_MATCH_ANY",			1 );
+define ( "SPH_MATCH_PHRASE",		2 );
+define ( "SPH_MATCH_BOOLEAN",		3 );
+define ( "SPH_MATCH_EXTENDED",		4 );
+define ( "SPH_MATCH_FULLSCAN",		5 );
+define ( "SPH_MATCH_EXTENDED2",		6 );	// extended engine V2 (TEMPORARY, WILL BE REMOVED)
+
+/// known ranking modes (ext2 only)
+define ( "SPH_RANK_PROXIMITY_BM25",	0 );	///< default mode, phrase proximity major factor and BM25 minor one
+define ( "SPH_RANK_BM25",			1 );	///< statistical mode, BM25 ranking only (faster but worse quality)
+define ( "SPH_RANK_NONE",			2 );	///< no ranking, all matches get a weight of 1
+define ( "SPH_RANK_WORDCOUNT",		3 );	///< simple word-count weighting, rank is a weighted sum of per-field keyword occurence counts
+define ( "SPH_RANK_PROXIMITY",		4 );
+define ( "SPH_RANK_MATCHANY",		5 );
+define ( "SPH_RANK_FIELDMASK",		6 );
+define ( "SPH_RANK_SPH04",			7 );
+define ( "SPH_RANK_EXPR",			8 );
+define ( "SPH_RANK_TOTAL",			9 );
+
+/// known sort modes
+define ( "SPH_SORT_RELEVANCE",		0 );
+define ( "SPH_SORT_ATTR_DESC",		1 );
+define ( "SPH_SORT_ATTR_ASC",		2 );
+define ( "SPH_SORT_TIME_SEGMENTS", 	3 );
+define ( "SPH_SORT_EXTENDED", 		4 );
+define ( "SPH_SORT_EXPR", 			5 );
+
+/// known filter types
+define ( "SPH_FILTER_VALUES",		0 );
+define ( "SPH_FILTER_RANGE",		1 );
+define ( "SPH_FILTER_FLOATRANGE",	2 );
+
+/// known attribute types
+define ( "SPH_ATTR_INTEGER",		1 );
+define ( "SPH_ATTR_TIMESTAMP",		2 );
+define ( "SPH_ATTR_ORDINAL",		3 );
+define ( "SPH_ATTR_BOOL",			4 );
+define ( "SPH_ATTR_FLOAT",			5 );
+define ( "SPH_ATTR_BIGINT",			6 );
+define ( "SPH_ATTR_STRING",			7 );
+define ( "SPH_ATTR_MULTI",			0x40000001 );
+define ( "SPH_ATTR_MULTI64",			0x40000002 );
+
+/// known grouping functions
+define ( "SPH_GROUPBY_DAY",			0 );
+define ( "SPH_GROUPBY_WEEK",		1 );
+define ( "SPH_GROUPBY_MONTH",		2 );
+define ( "SPH_GROUPBY_YEAR",		3 );
+define ( "SPH_GROUPBY_ATTR",		4 );
+define ( "SPH_GROUPBY_ATTRPAIR",	5 );
+
+// important properties of PHP's integers:
+//  - always signed (one bit short of PHP_INT_SIZE)
+//  - conversion from string to int is saturated
+//  - float is double
+//  - div converts arguments to floats
+//  - mod converts arguments to ints
+
+// the packing code below works as follows:
+//  - when we got an int, just pack it
+//    if performance is a problem, this is the branch users should aim for
+//
+//  - otherwise, we got a number in string form
+//    this might be due to different reasons, but we assume that this is
+//    because it didn't fit into PHP int
+//
+//  - factor the string into high and low ints for packing
+//    - if we have bcmath, then it is used
+//    - if we don't, we have to do it manually (this is the fun part)
+//
+//    - x64 branch does factoring using ints
+//    - x32 (ab)uses floats, since we can't fit unsigned 32-bit number into an int
+//
+// unpacking routines are pretty much the same.
+//  - return ints if we can
+//  - otherwise format number into a string
+
+/// pack 64-bit signed
+function sphPackI64 ( $v )
+{
+	assert ( is_numeric($v) );
+	
+	// x64
+	if ( PHP_INT_SIZE>=8 )
+	{
+		$v = (int)$v;
+		return pack ( "NN", $v>>32, $v&0xFFFFFFFF );
+	}
+
+	// x32, int
+	if ( is_int($v) )
+		return pack ( "NN", $v < 0 ? -1 : 0, $v );
+
+	// x32, bcmath	
+	if ( function_exists("bcmul") )
+	{
+		if ( bccomp ( $v, 0 ) == -1 )
+			$v = bcadd ( "18446744073709551616", $v );
+		$h = bcdiv ( $v, "4294967296", 0 );
+		$l = bcmod ( $v, "4294967296" );
+		return pack ( "NN", (float)$h, (float)$l ); // conversion to float is intentional; int would lose 31st bit
+	}
+
+	// x32, no-bcmath
+	$p = max(0, strlen($v) - 13);
+	$lo = abs((float)substr($v, $p));
+	$hi = abs((float)substr($v, 0, $p));
+
+	$m = $lo + $hi*1316134912.0; // (10 ^ 13) % (1 << 32) = 1316134912
+	$q = floor($m/4294967296.0);
+	$l = $m - ($q*4294967296.0);
+	$h = $hi*2328.0 + $q; // (10 ^ 13) / (1 << 32) = 2328
+
+	if ( $v<0 )
+	{
+		if ( $l==0 )
+			$h = 4294967296.0 - $h;
+		else
+		{
+			$h = 4294967295.0 - $h;
+			$l = 4294967296.0 - $l;
+		}
+	}
+	return pack ( "NN", $h, $l );
+}
+
+/// pack 64-bit unsigned
+function sphPackU64 ( $v )
+{
+	assert ( is_numeric($v) );
+	
+	// x64
+	if ( PHP_INT_SIZE>=8 )
+	{
+		assert ( $v>=0 );
+		
+		// x64, int
+		if ( is_int($v) )
+			return pack ( "NN", $v>>32, $v&0xFFFFFFFF );
+						  
+		// x64, bcmath
+		if ( function_exists("bcmul") )
+		{
+			$h = bcdiv ( $v, 4294967296, 0 );
+			$l = bcmod ( $v, 4294967296 );
+			return pack ( "NN", $h, $l );
+		}
+		
+		// x64, no-bcmath
+		$p = max ( 0, strlen($v) - 13 );
+		$lo = (int)substr ( $v, $p );
+		$hi = (int)substr ( $v, 0, $p );
+	
+		$m = $lo + $hi*1316134912;
+		$l = $m % 4294967296;
+		$h = $hi*2328 + (int)($m/4294967296);
+
+		return pack ( "NN", $h, $l );
+	}
+
+	// x32, int
+	if ( is_int($v) )
+		return pack ( "NN", 0, $v );
+	
+	// x32, bcmath
+	if ( function_exists("bcmul") )
+	{
+		$h = bcdiv ( $v, "4294967296", 0 );
+		$l = bcmod ( $v, "4294967296" );
+		return pack ( "NN", (float)$h, (float)$l ); // conversion to float is intentional; int would lose 31st bit
+	}
+
+	// x32, no-bcmath
+	$p = max(0, strlen($v) - 13);
+	$lo = (float)substr($v, $p);
+	$hi = (float)substr($v, 0, $p);
+	
+	$m = $lo + $hi*1316134912.0;
+	$q = floor($m / 4294967296.0);
+	$l = $m - ($q * 4294967296.0);
+	$h = $hi*2328.0 + $q;
+
+	return pack ( "NN", $h, $l );
+}
+
+// unpack 64-bit unsigned
+function sphUnpackU64 ( $v )
+{
+	list ( $hi, $lo ) = array_values ( unpack ( "N*N*", $v ) );
+
+	if ( PHP_INT_SIZE>=8 )
+	{
+		if ( $hi<0 ) $hi += (1<<32); // because php 5.2.2 to 5.2.5 is totally fucked up again
+		if ( $lo<0 ) $lo += (1<<32);
+
+		// x64, int
+		if ( $hi<=2147483647 )
+			return ($hi<<32) + $lo;
+
+		// x64, bcmath
+		if ( function_exists("bcmul") )
+			return bcadd ( $lo, bcmul ( $hi, "4294967296" ) );
+
+		// x64, no-bcmath
+		$C = 100000;
+		$h = ((int)($hi / $C) << 32) + (int)($lo / $C);
+		$l = (($hi % $C) << 32) + ($lo % $C);
+		if ( $l>$C )
+		{
+			$h += (int)($l / $C);
+			$l  = $l % $C;
+		}
+
+		if ( $h==0 )
+			return $l;
+		return sprintf ( "%d%05d", $h, $l );
+	}
+
+	// x32, int
+	if ( $hi==0 )
+	{
+		if ( $lo>0 )
+			return $lo;
+		return sprintf ( "%u", $lo );
+	}
+
+	$hi = sprintf ( "%u", $hi );
+	$lo = sprintf ( "%u", $lo );
+
+	// x32, bcmath
+	if ( function_exists("bcmul") )
+		return bcadd ( $lo, bcmul ( $hi, "4294967296" ) );
+	
+	// x32, no-bcmath
+	$hi = (float)$hi;
+	$lo = (float)$lo;
+	
+	$q = floor($hi/10000000.0);
+	$r = $hi - $q*10000000.0;
+	$m = $lo + $r*4967296.0;
+	$mq = floor($m/10000000.0);
+	$l = $m - $mq*10000000.0;
+	$h = $q*4294967296.0 + $r*429.0 + $mq;
+
+	$h = sprintf ( "%.0f", $h );
+	$l = sprintf ( "%07.0f", $l );
+	if ( $h=="0" )
+		return sprintf( "%.0f", (float)$l );
+	return $h . $l;
+}
+
+// unpack 64-bit signed
+function sphUnpackI64 ( $v )
+{
+	list ( $hi, $lo ) = array_values ( unpack ( "N*N*", $v ) );
+
+	// x64
+	if ( PHP_INT_SIZE>=8 )
+	{
+		if ( $hi<0 ) $hi += (1<<32); // because php 5.2.2 to 5.2.5 is totally fucked up again
+		if ( $lo<0 ) $lo += (1<<32);
+
+		return ($hi<<32) + $lo;
+	}
+
+	// x32, int
+	if ( $hi==0 )
+	{
+		if ( $lo>0 )
+			return $lo;
+		return sprintf ( "%u", $lo );
+	}
+	// x32, int
+	elseif ( $hi==-1 )
+	{
+		if ( $lo<0 )
+			return $lo;
+		return sprintf ( "%.0f", $lo - 4294967296.0 );
+	}
+	
+	$neg = "";
+	$c = 0;
+	if ( $hi<0 )
+	{
+		$hi = ~$hi;
+		$lo = ~$lo;
+		$c = 1;
+		$neg = "-";
+	}	
+
+	$hi = sprintf ( "%u", $hi );
+	$lo = sprintf ( "%u", $lo );
+
+	// x32, bcmath
+	if ( function_exists("bcmul") )
+		return $neg . bcadd ( bcadd ( $lo, bcmul ( $hi, "4294967296" ) ), $c );
+
+	// x32, no-bcmath
+	$hi = (float)$hi;
+	$lo = (float)$lo;
+	
+	$q = floor($hi/10000000.0);
+	$r = $hi - $q*10000000.0;
+	$m = $lo + $r*4967296.0;
+	$mq = floor($m/10000000.0);
+	$l = $m - $mq*10000000.0 + $c;
+	$h = $q*4294967296.0 + $r*429.0 + $mq;
+	if ( $l==10000000 )
+	{
+		$l = 0;
+		$h += 1;
+	}
+
+	$h = sprintf ( "%.0f", $h );
+	$l = sprintf ( "%07.0f", $l );
+	if ( $h=="0" )
+		return $neg . sprintf( "%.0f", (float)$l );
+	return $neg . $h . $l;
+}
+
+
+function sphFixUint ( $value )
+{
+	if ( PHP_INT_SIZE>=8 )
+	{
+		// x64 route, workaround broken unpack() in 5.2.2+
+		if ( $value<0 ) $value += (1<<32);
+		return $value;
+	}
+	else
+	{
+		// x32 route, workaround php signed/unsigned braindamage
+		return sprintf ( "%u", $value );
+	}
+}
+
+
+/// sphinx searchd client class
+class SphinxClient
+{
+	var $_host;			///< searchd host (default is "localhost")
+	var $_port;			///< searchd port (default is 9312)
+	var $_offset;		///< how many records to seek from result-set start (default is 0)
+	var $_limit;		///< how many records to return from result-set starting at offset (default is 20)
+	var $_mode;			///< query matching mode (default is SPH_MATCH_ALL)
+	var $_weights;		///< per-field weights (default is 1 for all fields)
+	var $_sort;			///< match sorting mode (default is SPH_SORT_RELEVANCE)
+	var $_sortby;		///< attribute to sort by (defualt is "")
+	var $_min_id;		///< min ID to match (default is 0, which means no limit)
+	var $_max_id;		///< max ID to match (default is 0, which means no limit)
+	var $_filters;		///< search filters
+	var $_groupby;		///< group-by attribute name
+	var $_groupfunc;	///< group-by function (to pre-process group-by attribute value with)
+	var $_groupsort;	///< group-by sorting clause (to sort groups in result set with)
+	var $_groupdistinct;///< group-by count-distinct attribute
+	var $_maxmatches;	///< max matches to retrieve
+	var $_cutoff;		///< cutoff to stop searching at (default is 0)
+	var $_retrycount;	///< distributed retries count
+	var $_retrydelay;	///< distributed retries delay
+	var $_anchor;		///< geographical anchor point
+	var $_indexweights;	///< per-index weights
+	var $_ranker;		///< ranking mode (default is SPH_RANK_PROXIMITY_BM25)
+	var $_rankexpr;		///< ranking mode expression (for SPH_RANK_EXPR)
+	var $_maxquerytime;	///< max query time, milliseconds (default is 0, do not limit)
+	var $_fieldweights;	///< per-field-name weights
+	var $_overrides;	///< per-query attribute values overrides
+	var $_select;		///< select-list (attributes or expressions, with optional aliases)
+
+	var $_error;		///< last error message
+	var $_warning;		///< last warning message
+	var $_connerror;		///< connection error vs remote error flag
+
+	var $_reqs;			///< requests array for multi-query
+	var $_mbenc;		///< stored mbstring encoding
+	var $_arrayresult;	///< whether $result["matches"] should be a hash or an array
+	var $_timeout;		///< connect timeout
+
+	/////////////////////////////////////////////////////////////////////////////
+	// common stuff
+	/////////////////////////////////////////////////////////////////////////////
+
+	/// create a new client object and fill defaults
+	function SphinxClient ()
+	{
+		// per-client-object settings
+		$this->_host		= "localhost";
+		$this->_port		= 9312;
+		$this->_path		= false;
+		$this->_socket		= false;
+
+		// per-query settings
+		$this->_offset		= 0;
+		$this->_limit		= 20;
+		$this->_mode		= SPH_MATCH_ALL;
+		$this->_weights		= array ();
+		$this->_sort		= SPH_SORT_RELEVANCE;
+		$this->_sortby		= "";
+		$this->_min_id		= 0;
+		$this->_max_id		= 0;
+		$this->_filters		= array ();
+		$this->_groupby		= "";
+		$this->_groupfunc	= SPH_GROUPBY_DAY;
+		$this->_groupsort	= "@group desc";
+		$this->_groupdistinct= "";
+		$this->_maxmatches	= 1000;
+		$this->_cutoff		= 0;
+		$this->_retrycount	= 0;
+		$this->_retrydelay	= 0;
+		$this->_anchor		= array ();
+		$this->_indexweights= array ();
+		$this->_ranker		= SPH_RANK_PROXIMITY_BM25;
+		$this->_rankexpr	= "";
+		$this->_maxquerytime= 0;
+		$this->_fieldweights= array();
+		$this->_overrides 	= array();
+		$this->_select		= "*";
+
+		$this->_error		= ""; // per-reply fields (for single-query case)
+		$this->_warning		= "";
+		$this->_connerror	= false;
+
+		$this->_reqs		= array ();	// requests storage (for multi-query case)
+		$this->_mbenc		= "";
+		$this->_arrayresult	= false;
+		$this->_timeout		= 0;
+	}
+
+	function __destruct()
+	{
+		if ( $this->_socket !== false )
+			fclose ( $this->_socket );
+	}
+
+	/// get last error message (string)
+	function GetLastError ()
+	{
+		return $this->_error;
+	}
+
+	/// get last warning message (string)
+	function GetLastWarning ()
+	{
+		return $this->_warning;
+	}
+
+	/// get last error flag (to tell network connection errors from searchd errors or broken responses)
+	function IsConnectError()
+	{
+		return $this->_connerror;
+	}
+
+	/// set searchd host name (string) and port (integer)
+	function SetServer ( $host, $port = 0 )
+	{
+		assert ( is_string($host) );
+		if ( $host[0] == '/')
+		{
+			$this->_path = 'unix://' . $host;
+			return;
+		}
+		if ( substr ( $host, 0, 7 )=="unix://" )
+		{
+			$this->_path = $host;
+			return;
+		}
+				
+		assert ( is_int($port) );
+		$this->_host = $host;
+		$this->_port = $port;
+		$this->_path = '';
+
+	}
+
+	/// set server connection timeout (0 to remove)
+	function SetConnectTimeout ( $timeout )
+	{
+		assert ( is_numeric($timeout) );
+		$this->_timeout = $timeout;
+	}
+
+
+	function _Send ( $handle, $data, $length )
+	{
+		if ( feof($handle) || fwrite ( $handle, $data, $length ) !== $length )
+		{
+			$this->_error = 'connection unexpectedly closed (timed out?)';
+			$this->_connerror = true;
+			return false;
+		}
+		return true;
+	}
+
+	/////////////////////////////////////////////////////////////////////////////
+
+	/// enter mbstring workaround mode
+	function _MBPush ()
+	{
+		$this->_mbenc = "";
+		if ( ini_get ( "mbstring.func_overload" ) & 2 )
+		{
+			$this->_mbenc = mb_internal_encoding();
+			mb_internal_encoding ( "latin1" );
+		}
+    }
+
+	/// leave mbstring workaround mode
+	function _MBPop ()
+	{
+		if ( $this->_mbenc )
+			mb_internal_encoding ( $this->_mbenc );
+	}
+
+	/// connect to searchd server
+	function _Connect ()
+	{
+		if ( $this->_socket!==false )
+		{
+			// we are in persistent connection mode, so we have a socket
+			// however, need to check whether it's still alive
+			if ( !@feof ( $this->_socket ) )
+				return $this->_socket;
+
+			// force reopen
+			$this->_socket = false;
+		}
+
+		$errno = 0;
+		$errstr = "";
+		$this->_connerror = false;
+
+		if ( $this->_path )
+		{
+			$host = $this->_path;
+			$port = 0;
+		}
+		else
+		{
+			$host = $this->_host;
+			$port = $this->_port;
+		}
+
+		if ( $this->_timeout<=0 )
+			$fp = @fsockopen ( $host, $port, $errno, $errstr );
+		else
+			$fp = @fsockopen ( $host, $port, $errno, $errstr, $this->_timeout );
+		
+		if ( !$fp )
+		{
+			if ( $this->_path )
+				$location = $this->_path;
+			else
+				$location = "{$this->_host}:{$this->_port}";
+			
+			$errstr = trim ( $errstr );
+			$this->_error = "connection to $location failed (errno=$errno, msg=$errstr)";
+			$this->_connerror = true;
+			return false;
+		}
+
+		// send my version
+		// this is a subtle part. we must do it before (!) reading back from searchd.
+		// because otherwise under some conditions (reported on FreeBSD for instance)
+		// TCP stack could throttle write-write-read pattern because of Nagle.
+		if ( !$this->_Send ( $fp, pack ( "N", 1 ), 4 ) )
+		{
+			fclose ( $fp );
+			$this->_error = "failed to send client protocol version";
+			return false;
+		}
+
+		// check version
+		list(,$v) = unpack ( "N*", fread ( $fp, 4 ) );
+		$v = (int)$v;
+		if ( $v<1 )
+		{
+			fclose ( $fp );
+			$this->_error = "expected searchd protocol version 1+, got version '$v'";
+			return false;
+		}
+
+		return $fp;
+	}
+
+	/// get and check response packet from searchd server
+	function _GetResponse ( $fp, $client_ver )
+	{
+		$response = "";
+		$len = 0;
+
+		$header = fread ( $fp, 8 );
+		if ( strlen($header)==8 )
+		{
+			list ( $status, $ver, $len ) = array_values ( unpack ( "n2a/Nb", $header ) );
+			$left = $len;
+			while ( $left>0 && !feof($fp) )
+			{
+				$chunk = fread ( $fp, min ( 8192, $left ) );
+				if ( $chunk )
+				{
+					$response .= $chunk;
+					$left -= strlen($chunk);
+				}
+			}
+		}
+		if ( $this->_socket === false )
+			fclose ( $fp );
+
+		// check response
+		$read = strlen ( $response );
+		if ( !$response || $read!=$len )
+		{
+			$this->_error = $len
+				? "failed to read searchd response (status=$status, ver=$ver, len=$len, read=$read)"
+				: "received zero-sized searchd response";
+			return false;
+		}
+
+		// check status
+		if ( $status==SEARCHD_WARNING )
+		{
+			list(,$wlen) = unpack ( "N*", substr ( $response, 0, 4 ) );
+			$this->_warning = substr ( $response, 4, $wlen );
+			return substr ( $response, 4+$wlen );
+		}
+		if ( $status==SEARCHD_ERROR )
+		{
+			$this->_error = "searchd error: " . substr ( $response, 4 );
+			return false;
+		}
+		if ( $status==SEARCHD_RETRY )
+		{
+			$this->_error = "temporary searchd error: " . substr ( $response, 4 );
+			return false;
+		}
+		if ( $status!=SEARCHD_OK )
+		{
+			$this->_error = "unknown status code '$status'";
+			return false;
+		}
+
+		// check version
+		if ( $ver<$client_ver )
+		{
+			$this->_warning = sprintf ( "searchd command v.%d.%d older than client's v.%d.%d, some options might not work",
+				$ver>>8, $ver&0xff, $client_ver>>8, $client_ver&0xff );
+		}
+
+		return $response;
+	}
+
+	/////////////////////////////////////////////////////////////////////////////
+	// searching
+	/////////////////////////////////////////////////////////////////////////////
+
+	/// set offset and count into result set,
+	/// and optionally set max-matches and cutoff limits
+	function SetLimits ( $offset, $limit, $max=0, $cutoff=0 )
+	{
+		assert ( is_int($offset) );
+		assert ( is_int($limit) );
+		assert ( $offset>=0 );
+		assert ( $limit>0 );
+		assert ( $max>=0 );
+		$this->_offset = $offset;
+		$this->_limit = $limit;
+		if ( $max>0 )
+			$this->_maxmatches = $max;
+		if ( $cutoff>0 )
+			$this->_cutoff = $cutoff;
+	}
+
+	/// set maximum query time, in milliseconds, per-index
+	/// integer, 0 means "do not limit"
+	function SetMaxQueryTime ( $max )
+	{
+		assert ( is_int($max) );
+		assert ( $max>=0 );
+		$this->_maxquerytime = $max;
+	}
+
+	/// set matching mode
+	function SetMatchMode ( $mode )
+	{
+		assert ( $mode==SPH_MATCH_ALL
+			|| $mode==SPH_MATCH_ANY
+			|| $mode==SPH_MATCH_PHRASE
+			|| $mode==SPH_MATCH_BOOLEAN
+			|| $mode==SPH_MATCH_EXTENDED
+			|| $mode==SPH_MATCH_FULLSCAN
+			|| $mode==SPH_MATCH_EXTENDED2 );
+		$this->_mode = $mode;
+	}
+
+	/// set ranking mode
+	function SetRankingMode ( $ranker, $rankexpr="" )
+	{
+		assert ( $ranker>=0 && $ranker<SPH_RANK_TOTAL );
+		assert ( is_string($rankexpr) );
+		$this->_ranker = $ranker;
+		$this->_rankexpr = $rankexpr;
+	}
+
+	/// set matches sorting mode
+	function SetSortMode ( $mode, $sortby="" )
+	{
+		assert (
+			$mode==SPH_SORT_RELEVANCE ||
+			$mode==SPH_SORT_ATTR_DESC ||
+			$mode==SPH_SORT_ATTR_ASC ||
+			$mode==SPH_SORT_TIME_SEGMENTS ||
+			$mode==SPH_SORT_EXTENDED ||
+			$mode==SPH_SORT_EXPR );
+		assert ( is_string($sortby) );
+		assert ( $mode==SPH_SORT_RELEVANCE || strlen($sortby)>0 );
+
+		$this->_sort = $mode;
+		$this->_sortby = $sortby;
+	}
+
+	/// bind per-field weights by order
+	/// DEPRECATED; use SetFieldWeights() instead
+	function SetWeights ( $weights )
+	{
+		assert ( is_array($weights) );
+		foreach ( $weights as $weight )
+			assert ( is_int($weight) );
+
+		$this->_weights = $weights;
+	}
+
+	/// bind per-field weights by name
+	function SetFieldWeights ( $weights )
+	{
+		assert ( is_array($weights) );
+		foreach ( $weights as $name=>$weight )
+		{
+			assert ( is_string($name) );
+			assert ( is_int($weight) );
+		}
+		$this->_fieldweights = $weights;
+	}
+
+	/// bind per-index weights by name
+	function SetIndexWeights ( $weights )
+	{
+		assert ( is_array($weights) );
+		foreach ( $weights as $index=>$weight )
+		{
+			assert ( is_string($index) );
+			assert ( is_int($weight) );
+		}
+		$this->_indexweights = $weights;
+	}
+
+	/// set IDs range to match
+	/// only match records if document ID is beetwen $min and $max (inclusive)
+	function SetIDRange ( $min, $max )
+	{
+		assert ( is_numeric($min) );
+		assert ( is_numeric($max) );
+		assert ( $min<=$max );
+		$this->_min_id = $min;
+		$this->_max_id = $max;
+	}
+
+	/// set values set filter
+	/// only match records where $attribute value is in given set
+	function SetFilter ( $attribute, $values, $exclude=false )
+	{
+		assert ( is_string($attribute) );
+		assert ( is_array($values) );
+		assert ( count($values) );
+
+		if ( is_array($values) && count($values) )
+		{
+			foreach ( $values as $value )
+				assert ( is_numeric($value) );
+
+			$this->_filters[] = array ( "type"=>SPH_FILTER_VALUES, "attr"=>$attribute, "exclude"=>$exclude, "values"=>$values );
+		}
+	}
+
+	/// set range filter
+	/// only match records if $attribute value is beetwen $min and $max (inclusive)
+	function SetFilterRange ( $attribute, $min, $max, $exclude=false )
+	{
+		assert ( is_string($attribute) );
+		assert ( is_numeric($min) );
+		assert ( is_numeric($max) );
+		assert ( $min<=$max );
+
+		$this->_filters[] = array ( "type"=>SPH_FILTER_RANGE, "attr"=>$attribute, "exclude"=>$exclude, "min"=>$min, "max"=>$max );
+	}
+
+	/// set float range filter
+	/// only match records if $attribute value is beetwen $min and $max (inclusive)
+	function SetFilterFloatRange ( $attribute, $min, $max, $exclude=false )
+	{
+		assert ( is_string($attribute) );
+		assert ( is_float($min) );
+		assert ( is_float($max) );
+		assert ( $min<=$max );
+
+		$this->_filters[] = array ( "type"=>SPH_FILTER_FLOATRANGE, "attr"=>$attribute, "exclude"=>$exclude, "min"=>$min, "max"=>$max );
+	}
+
+	/// setup anchor point for geosphere distance calculations
+	/// required to use @geodist in filters and sorting
+	/// latitude and longitude must be in radians
+	function SetGeoAnchor ( $attrlat, $attrlong, $lat, $long )
+	{
+		assert ( is_string($attrlat) );
+		assert ( is_string($attrlong) );
+		assert ( is_float($lat) );
+		assert ( is_float($long) );
+
+		$this->_anchor = array ( "attrlat"=>$attrlat, "attrlong"=>$attrlong, "lat"=>$lat, "long"=>$long );
+	}
+
+	/// set grouping attribute and function
+	function SetGroupBy ( $attribute, $func, $groupsort="@group desc" )
+	{
+		assert ( is_string($attribute) );
+		assert ( is_string($groupsort) );
+		assert ( $func==SPH_GROUPBY_DAY
+			|| $func==SPH_GROUPBY_WEEK
+			|| $func==SPH_GROUPBY_MONTH
+			|| $func==SPH_GROUPBY_YEAR
+			|| $func==SPH_GROUPBY_ATTR
+			|| $func==SPH_GROUPBY_ATTRPAIR );
+
+		$this->_groupby = $attribute;
+		$this->_groupfunc = $func;
+		$this->_groupsort = $groupsort;
+	}
+
+	/// set count-distinct attribute for group-by queries
+	function SetGroupDistinct ( $attribute )
+	{
+		assert ( is_string($attribute) );
+		$this->_groupdistinct = $attribute;
+	}
+
+	/// set distributed retries count and delay
+	function SetRetries ( $count, $delay=0 )
+	{
+		assert ( is_int($count) && $count>=0 );
+		assert ( is_int($delay) && $delay>=0 );
+		$this->_retrycount = $count;
+		$this->_retrydelay = $delay;
+	}
+
+	/// set result set format (hash or array; hash by default)
+	/// PHP specific; needed for group-by-MVA result sets that may contain duplicate IDs
+	function SetArrayResult ( $arrayresult )
+	{
+		assert ( is_bool($arrayresult) );
+		$this->_arrayresult = $arrayresult;
+	}
+
+	/// set attribute values override
+	/// there can be only one override per attribute
+	/// $values must be a hash that maps document IDs to attribute values
+	function SetOverride ( $attrname, $attrtype, $values )
+	{
+		assert ( is_string ( $attrname ) );
+		assert ( in_array ( $attrtype, array ( SPH_ATTR_INTEGER, SPH_ATTR_TIMESTAMP, SPH_ATTR_BOOL, SPH_ATTR_FLOAT, SPH_ATTR_BIGINT ) ) );
+		assert ( is_array ( $values ) );
+
+		$this->_overrides[$attrname] = array ( "attr"=>$attrname, "type"=>$attrtype, "values"=>$values );
+	}
+
+	/// set select-list (attributes or expressions), SQL-like syntax
+	function SetSelect ( $select )
+	{
+		assert ( is_string ( $select ) );
+		$this->_select = $select;
+	}
+
+	//////////////////////////////////////////////////////////////////////////////
+
+	/// clear all filters (for multi-queries)
+	function ResetFilters ()
+	{
+		$this->_filters = array();
+		$this->_anchor = array();
+	}
+
+	/// clear groupby settings (for multi-queries)
+	function ResetGroupBy ()
+	{
+		$this->_groupby		= "";
+		$this->_groupfunc	= SPH_GROUPBY_DAY;
+		$this->_groupsort	= "@group desc";
+		$this->_groupdistinct= "";
+	}
+
+	/// clear all attribute value overrides (for multi-queries)
+	function ResetOverrides ()
+    {
+    	$this->_overrides = array ();
+    }
+
+	//////////////////////////////////////////////////////////////////////////////
+
+	/// connect to searchd server, run given search query through given indexes,
+	/// and return the search results
+	function Query ( $query, $index="*", $comment="" )
+	{
+		assert ( empty($this->_reqs) );
+
+		$this->AddQuery ( $query, $index, $comment );
+		$results = $this->RunQueries ();
+		$this->_reqs = array (); // just in case it failed too early
+
+		if ( !is_array($results) )
+			return false; // probably network error; error message should be already filled
+
+		$this->_error = $results[0]["error"];
+		$this->_warning = $results[0]["warning"];
+		if ( $results[0]["status"]==SEARCHD_ERROR )
+			return false;
+		else
+			return $results[0];
+	}
+
+	/// helper to pack floats in network byte order
+	function _PackFloat ( $f )
+	{
+		$t1 = pack ( "f", $f ); // machine order
+		list(,$t2) = unpack ( "L*", $t1 ); // int in machine order
+		return pack ( "N", $t2 );
+	}
+
+	/// add query to multi-query batch
+	/// returns index into results array from RunQueries() call
+	function AddQuery ( $query, $index="*", $comment="" )
+	{
+		// mbstring workaround
+		$this->_MBPush ();
+
+		// build request
+		$req = pack ( "NNNN", $this->_offset, $this->_limit, $this->_mode, $this->_ranker );
+		if ( $this->_ranker==SPH_RANK_EXPR )
+			$req .= pack ( "N", strlen($this->_rankexpr) ) . $this->_rankexpr;
+		$req .= pack ( "N", $this->_sort ); // (deprecated) sort mode
+		$req .= pack ( "N", strlen($this->_sortby) ) . $this->_sortby;
+		$req .= pack ( "N", strlen($query) ) . $query; // query itself
+		$req .= pack ( "N", count($this->_weights) ); // weights
+		foreach ( $this->_weights as $weight )
+			$req .= pack ( "N", (int)$weight );
+		$req .= pack ( "N", strlen($index) ) . $index; // indexes
+		$req .= pack ( "N", 1 ); // id64 range marker
+		$req .= sphPackU64 ( $this->_min_id ) . sphPackU64 ( $this->_max_id ); // id64 range
+
+		// filters
+		$req .= pack ( "N", count($this->_filters) );
+		foreach ( $this->_filters as $filter )
+		{
+			$req .= pack ( "N", strlen($filter["attr"]) ) . $filter["attr"];
+			$req .= pack ( "N", $filter["type"] );
+			switch ( $filter["type"] )
+			{
+				case SPH_FILTER_VALUES:
+					$req .= pack ( "N", count($filter["values"]) );
+					foreach ( $filter["values"] as $value )
+						$req .= sphPackI64 ( $value );
+					break;
+
+				case SPH_FILTER_RANGE:
+					$req .= sphPackI64 ( $filter["min"] ) . sphPackI64 ( $filter["max"] );
+					break;
+
+				case SPH_FILTER_FLOATRANGE:
+					$req .= $this->_PackFloat ( $filter["min"] ) . $this->_PackFloat ( $filter["max"] );
+					break;
+
+				default:
+					assert ( 0 && "internal error: unhandled filter type" );
+			}
+			$req .= pack ( "N", $filter["exclude"] );
+		}
+
+		// group-by clause, max-matches count, group-sort clause, cutoff count
+		$req .= pack ( "NN", $this->_groupfunc, strlen($this->_groupby) ) . $this->_groupby;
+		$req .= pack ( "N", $this->_maxmatches );
+		$req .= pack ( "N", strlen($this->_groupsort) ) . $this->_groupsort;
+		$req .= pack ( "NNN", $this->_cutoff, $this->_retrycount, $this->_retrydelay );
+		$req .= pack ( "N", strlen($this->_groupdistinct) ) . $this->_groupdistinct;
+
+		// anchor point
+		if ( empty($this->_anchor) )
+		{
+			$req .= pack ( "N", 0 );
+		} else
+		{
+			$a =& $this->_anchor;
+			$req .= pack ( "N", 1 );
+			$req .= pack ( "N", strlen($a["attrlat"]) ) . $a["attrlat"];
+			$req .= pack ( "N", strlen($a["attrlong"]) ) . $a["attrlong"];
+			$req .= $this->_PackFloat ( $a["lat"] ) . $this->_PackFloat ( $a["long"] );
+		}
+
+		// per-index weights
+		$req .= pack ( "N", count($this->_indexweights) );
+		foreach ( $this->_indexweights as $idx=>$weight )
+			$req .= pack ( "N", strlen($idx) ) . $idx . pack ( "N", $weight );
+
+		// max query time
+		$req .= pack ( "N", $this->_maxquerytime );
+
+		// per-field weights
+		$req .= pack ( "N", count($this->_fieldweights) );
+		foreach ( $this->_fieldweights as $field=>$weight )
+			$req .= pack ( "N", strlen($field) ) . $field . pack ( "N", $weight );
+
+		// comment
+		$req .= pack ( "N", strlen($comment) ) . $comment;
+
+		// attribute overrides
+		$req .= pack ( "N", count($this->_overrides) );
+		foreach ( $this->_overrides as $key => $entry )
+		{
+			$req .= pack ( "N", strlen($entry["attr"]) ) . $entry["attr"];
+			$req .= pack ( "NN", $entry["type"], count($entry["values"]) );
+			foreach ( $entry["values"] as $id=>$val )
+			{
+				assert ( is_numeric($id) );
+				assert ( is_numeric($val) );
+
+				$req .= sphPackU64 ( $id );
+				switch ( $entry["type"] )
+				{
+					case SPH_ATTR_FLOAT:	$req .= $this->_PackFloat ( $val ); break;
+					case SPH_ATTR_BIGINT:	$req .= sphPackI64 ( $val ); break;
+					default:				$req .= pack ( "N", $val ); break;
+				}
+			}
+		}
+
+		// select-list
+		$req .= pack ( "N", strlen($this->_select) ) . $this->_select;
+
+		// mbstring workaround
+		$this->_MBPop ();
+
+		// store request to requests array
+		$this->_reqs[] = $req;
+		return count($this->_reqs)-1;
+	}
+
+	/// connect to searchd, run queries batch, and return an array of result sets
+	function RunQueries ()
+	{
+		if ( empty($this->_reqs) )
+		{
+			$this->_error = "no queries defined, issue AddQuery() first";
+			return false;
+		}
+
+		// mbstring workaround
+		$this->_MBPush ();
+
+		if (!( $fp = $this->_Connect() ))
+		{
+			$this->_MBPop ();
+			return false;
+		}
+
+		// send query, get response
+		$nreqs = count($this->_reqs);
+		$req = join ( "", $this->_reqs );
+		$len = 8+strlen($req);
+		$req = pack ( "nnNNN", SEARCHD_COMMAND_SEARCH, VER_COMMAND_SEARCH, $len, 0, $nreqs ) . $req; // add header
+
+		if ( !( $this->_Send ( $fp, $req, $len+8 ) ) ||
+			 !( $response = $this->_GetResponse ( $fp, VER_COMMAND_SEARCH ) ) )
+		{
+			$this->_MBPop ();
+			return false;
+		}
+
+		// query sent ok; we can reset reqs now
+		$this->_reqs = array ();
+
+		// parse and return response
+		return $this->_ParseSearchResponse ( $response, $nreqs );
+	}
+
+	/// parse and return search query (or queries) response
+	function _ParseSearchResponse ( $response, $nreqs )
+	{
+		$p = 0; // current position
+		$max = strlen($response); // max position for checks, to protect against broken responses
+
+		$results = array ();
+		for ( $ires=0; $ires<$nreqs && $p<$max; $ires++ )
+		{
+			$results[] = array();
+			$result =& $results[$ires];
+
+			$result["error"] = "";
+			$result["warning"] = "";
+
+			// extract status
+			list(,$status) = unpack ( "N*", substr ( $response, $p, 4 ) ); $p += 4;
+			$result["status"] = $status;
+			if ( $status!=SEARCHD_OK )
+			{
+				list(,$len) = unpack ( "N*", substr ( $response, $p, 4 ) ); $p += 4;
+				$message = substr ( $response, $p, $len ); $p += $len;
+
+				if ( $status==SEARCHD_WARNING )
+				{
+					$result["warning"] = $message;
+				} else
+				{
+					$result["error"] = $message;
+					continue;
+				}
+			}
+
+			// read schema
+			$fields = array ();
+			$attrs = array ();
+
+			list(,$nfields) = unpack ( "N*", substr ( $response, $p, 4 ) ); $p += 4;
+			while ( $nfields-->0 && $p<$max )
+			{
+				list(,$len) = unpack ( "N*", substr ( $response, $p, 4 ) ); $p += 4;
+				$fields[] = substr ( $response, $p, $len ); $p += $len;
+			}
+			$result["fields"] = $fields;
+
+			list(,$nattrs) = unpack ( "N*", substr ( $response, $p, 4 ) ); $p += 4;
+			while ( $nattrs-->0 && $p<$max  )
+			{
+				list(,$len) = unpack ( "N*", substr ( $response, $p, 4 ) ); $p += 4;
+				$attr = substr ( $response, $p, $len ); $p += $len;
+				list(,$type) = unpack ( "N*", substr ( $response, $p, 4 ) ); $p += 4;
+				$attrs[$attr] = $type;
+			}
+			$result["attrs"] = $attrs;
+
+			// read match count
+			list(,$count) = unpack ( "N*", substr ( $response, $p, 4 ) ); $p += 4;
+			list(,$id64) = unpack ( "N*", substr ( $response, $p, 4 ) ); $p += 4;
+
+			// read matches
+			$idx = -1;
+			while ( $count-->0 && $p<$max )
+			{
+				// index into result array
+				$idx++;
+
+				// parse document id and weight
+				if ( $id64 )
+				{
+					$doc = sphUnpackU64 ( substr ( $response, $p, 8 ) ); $p += 8;
+					list(,$weight) = unpack ( "N*", substr ( $response, $p, 4 ) ); $p += 4;
+				}
+				else
+				{
+					list ( $doc, $weight ) = array_values ( unpack ( "N*N*",
+						substr ( $response, $p, 8 ) ) );
+					$p += 8;
+					$doc = sphFixUint($doc);
+				}
+				$weight = sprintf ( "%u", $weight );
+
+				// create match entry
+				if ( $this->_arrayresult )
+					$result["matches"][$idx] = array ( "id"=>$doc, "weight"=>$weight );
+				else
+					$result["matches"][$doc]["weight"] = $weight;
+
+				// parse and create attributes
+				$attrvals = array ();
+				foreach ( $attrs as $attr=>$type )
+				{
+					// handle 64bit ints
+					if ( $type==SPH_ATTR_BIGINT )
+					{
+						$attrvals[$attr] = sphUnpackI64 ( substr ( $response, $p, 8 ) ); $p += 8;
+						continue;
+					}
+
+					// handle floats
+					if ( $type==SPH_ATTR_FLOAT )
+					{
+						list(,$uval) = unpack ( "N*", substr ( $response, $p, 4 ) ); $p += 4;
+						list(,$fval) = unpack ( "f*", pack ( "L", $uval ) ); 
+						$attrvals[$attr] = $fval;
+						continue;
+					}
+
+					// handle everything else as unsigned ints
+					list(,$val) = unpack ( "N*", substr ( $response, $p, 4 ) ); $p += 4;
+					if ( $type==SPH_ATTR_MULTI )
+					{
+						$attrvals[$attr] = array ();
+						$nvalues = $val;
+						while ( $nvalues-->0 && $p<$max )
+						{
+							list(,$val) = unpack ( "N*", substr ( $response, $p, 4 ) ); $p += 4;
+							$attrvals[$attr][] = sphFixUint($val);
+						}
+					} else if ( $type==SPH_ATTR_MULTI64 )
+					{
+						$attrvals[$attr] = array ();
+						$nvalues = $val;
+						while ( $nvalues>0 && $p<$max )
+						{
+							$attrvals[$attr][] = sphUnpackU64 ( substr ( $response, $p, 8 ) ); $p += 8;
+							$nvalues -= 2;
+						}
+					} else if ( $type==SPH_ATTR_STRING )
+					{
+						$attrvals[$attr] = substr ( $response, $p, $val );
+						$p += $val;						
+					} else
+					{
+						$attrvals[$attr] = sphFixUint($val);
+					}
+				}
+
+				if ( $this->_arrayresult )
+					$result["matches"][$idx]["attrs"] = $attrvals;
+				else
+					$result["matches"][$doc]["attrs"] = $attrvals;
+			}
+
+			list ( $total, $total_found, $msecs, $words ) =
+				array_values ( unpack ( "N*N*N*N*", substr ( $response, $p, 16 ) ) );
+			$result["total"] = sprintf ( "%u", $total );
+			$result["total_found"] = sprintf ( "%u", $total_found );
+			$result["time"] = sprintf ( "%.3f", $msecs/1000 );
+			$p += 16;
+
+			while ( $words-->0 && $p<$max )
+			{
+				list(,$len) = unpack ( "N*", substr ( $response, $p, 4 ) ); $p += 4;
+				$word = substr ( $response, $p, $len ); $p += $len;
+				list ( $docs, $hits ) = array_values ( unpack ( "N*N*", substr ( $response, $p, 8 ) ) ); $p += 8;
+				$result["words"][$word] = array (
+					"docs"=>sprintf ( "%u", $docs ),
+					"hits"=>sprintf ( "%u", $hits ) );
+			}
+		}
+
+		$this->_MBPop ();
+		return $results;
+	}
+
+	/////////////////////////////////////////////////////////////////////////////
+	// excerpts generation
+	/////////////////////////////////////////////////////////////////////////////
+
+	/// connect to searchd server, and generate exceprts (snippets)
+	/// of given documents for given query. returns false on failure,
+	/// an array of snippets on success
+	function BuildExcerpts ( $docs, $index, $words, $opts=array() )
+	{
+		assert ( is_array($docs) );
+		assert ( is_string($index) );
+		assert ( is_string($words) );
+		assert ( is_array($opts) );
+
+		$this->_MBPush ();
+
+		if (!( $fp = $this->_Connect() ))
+		{
+			$this->_MBPop();
+			return false;
+		}
+
+		/////////////////
+		// fixup options
+		/////////////////
+
+		if ( !isset($opts["before_match"]) )		$opts["before_match"] = "<b>";
+		if ( !isset($opts["after_match"]) )			$opts["after_match"] = "</b>";
+		if ( !isset($opts["chunk_separator"]) )		$opts["chunk_separator"] = " ... ";
+		if ( !isset($opts["limit"]) )				$opts["limit"] = 256;
+		if ( !isset($opts["limit_passages"]) )		$opts["limit_passages"] = 0;
+		if ( !isset($opts["limit_words"]) )			$opts["limit_words"] = 0;
+		if ( !isset($opts["around"]) )				$opts["around"] = 5;
+		if ( !isset($opts["exact_phrase"]) )		$opts["exact_phrase"] = false;
+		if ( !isset($opts["single_passage"]) )		$opts["single_passage"] = false;
+		if ( !isset($opts["use_boundaries"]) )		$opts["use_boundaries"] = false;
+		if ( !isset($opts["weight_order"]) )		$opts["weight_order"] = false;
+		if ( !isset($opts["query_mode"]) )			$opts["query_mode"] = false;
+		if ( !isset($opts["force_all_words"]) )		$opts["force_all_words"] = false;
+		if ( !isset($opts["start_passage_id"]) )	$opts["start_passage_id"] = 1;
+		if ( !isset($opts["load_files"]) )			$opts["load_files"] = false;
+		if ( !isset($opts["html_strip_mode"]) )		$opts["html_strip_mode"] = "index";
+		if ( !isset($opts["allow_empty"]) )			$opts["allow_empty"] = false;
+		if ( !isset($opts["passage_boundary"]) )	$opts["passage_boundary"] = "none";
+		if ( !isset($opts["emit_zones"]) )			$opts["emit_zones"] = false;
+		if ( !isset($opts["load_files_scattered"]) )		$opts["load_files_scattered"] = false;
+		
+
+		/////////////////
+		// build request
+		/////////////////
+
+		// v.1.2 req
+		$flags = 1; // remove spaces
+		if ( $opts["exact_phrase"] )	$flags |= 2;
+		if ( $opts["single_passage"] )	$flags |= 4;
+		if ( $opts["use_boundaries"] )	$flags |= 8;
+		if ( $opts["weight_order"] )	$flags |= 16;
+		if ( $opts["query_mode"] )		$flags |= 32;
+		if ( $opts["force_all_words"] )	$flags |= 64;
+		if ( $opts["load_files"] )		$flags |= 128;
+		if ( $opts["allow_empty"] )		$flags |= 256;
+		if ( $opts["emit_zones"] )		$flags |= 512;
+		if ( $opts["load_files_scattered"] )	$flags |= 1024;
+		$req = pack ( "NN", 0, $flags ); // mode=0, flags=$flags
+		$req .= pack ( "N", strlen($index) ) . $index; // req index
+		$req .= pack ( "N", strlen($words) ) . $words; // req words
+
+		// options
+		$req .= pack ( "N", strlen($opts["before_match"]) ) . $opts["before_match"];
+		$req .= pack ( "N", strlen($opts["after_match"]) ) . $opts["after_match"];
+		$req .= pack ( "N", strlen($opts["chunk_separator"]) ) . $opts["chunk_separator"];
+		$req .= pack ( "NN", (int)$opts["limit"], (int)$opts["around"] );
+		$req .= pack ( "NNN", (int)$opts["limit_passages"], (int)$opts["limit_words"], (int)$opts["start_passage_id"] ); // v.1.2
+		$req .= pack ( "N", strlen($opts["html_strip_mode"]) ) . $opts["html_strip_mode"];
+		$req .= pack ( "N", strlen($opts["passage_boundary"]) ) . $opts["passage_boundary"];
+
+		// documents
+		$req .= pack ( "N", count($docs) );
+		foreach ( $docs as $doc )
+		{
+			assert ( is_string($doc) );
+			$req .= pack ( "N", strlen($doc) ) . $doc;
+		}
+
+		////////////////////////////
+		// send query, get response
+		////////////////////////////
+
+		$len = strlen($req);
+		$req = pack ( "nnN", SEARCHD_COMMAND_EXCERPT, VER_COMMAND_EXCERPT, $len ) . $req; // add header
+		if ( !( $this->_Send ( $fp, $req, $len+8 ) ) ||
+			 !( $response = $this->_GetResponse ( $fp, VER_COMMAND_EXCERPT ) ) )
+		{
+			$this->_MBPop ();
+			return false;
+		}
+
+		//////////////////
+		// parse response
+		//////////////////
+
+		$pos = 0;
+		$res = array ();
+		$rlen = strlen($response);
+		for ( $i=0; $i<count($docs); $i++ )
+		{
+			list(,$len) = unpack ( "N*", substr ( $response, $pos, 4 ) );
+			$pos += 4;
+
+			if ( $pos+$len > $rlen )
+			{
+				$this->_error = "incomplete reply";
+				$this->_MBPop ();
+				return false;
+			}
+			$res[] = $len ? substr ( $response, $pos, $len ) : "";
+			$pos += $len;
+		}
+
+		$this->_MBPop ();
+		return $res;
+	}
+
+
+	/////////////////////////////////////////////////////////////////////////////
+	// keyword generation
+	/////////////////////////////////////////////////////////////////////////////
+
+	/// connect to searchd server, and generate keyword list for a given query
+	/// returns false on failure,
+	/// an array of words on success
+	function BuildKeywords ( $query, $index, $hits )
+	{
+		assert ( is_string($query) );
+		assert ( is_string($index) );
+		assert ( is_bool($hits) );
+
+		$this->_MBPush ();
+
+		if (!( $fp = $this->_Connect() ))
+		{
+			$this->_MBPop();
+			return false;
+		}
+
+		/////////////////
+		// build request
+		/////////////////
+
+		// v.1.0 req
+		$req  = pack ( "N", strlen($query) ) . $query; // req query
+		$req .= pack ( "N", strlen($index) ) . $index; // req index
+		$req .= pack ( "N", (int)$hits );
+
+		////////////////////////////
+		// send query, get response
+		////////////////////////////
+
+		$len = strlen($req);
+		$req = pack ( "nnN", SEARCHD_COMMAND_KEYWORDS, VER_COMMAND_KEYWORDS, $len ) . $req; // add header
+		if ( !( $this->_Send ( $fp, $req, $len+8 ) ) ||
+			 !( $response = $this->_GetResponse ( $fp, VER_COMMAND_KEYWORDS ) ) )
+		{
+			$this->_MBPop ();
+			return false;
+		}
+
+		//////////////////
+		// parse response
+		//////////////////
+
+		$pos = 0;
+		$res = array ();
+		$rlen = strlen($response);
+		list(,$nwords) = unpack ( "N*", substr ( $response, $pos, 4 ) );
+		$pos += 4;
+		for ( $i=0; $i<$nwords; $i++ )
+		{
+			list(,$len) = unpack ( "N*", substr ( $response, $pos, 4 ) );	$pos += 4;
+			$tokenized = $len ? substr ( $response, $pos, $len ) : "";
+			$pos += $len;
+
+			list(,$len) = unpack ( "N*", substr ( $response, $pos, 4 ) );	$pos += 4;
+			$normalized = $len ? substr ( $response, $pos, $len ) : "";
+			$pos += $len;
+
+			$res[] = array ( "tokenized"=>$tokenized, "normalized"=>$normalized );
+
+			if ( $hits )
+			{
+				list($ndocs,$nhits) = array_values ( unpack ( "N*N*", substr ( $response, $pos, 8 ) ) );
+				$pos += 8;
+				$res [$i]["docs"] = $ndocs;
+				$res [$i]["hits"] = $nhits;
+			}
+
+			if ( $pos > $rlen )
+			{
+				$this->_error = "incomplete reply";
+				$this->_MBPop ();
+				return false;
+			}
+		}
+
+		$this->_MBPop ();
+		return $res;
+	}
+
+	function EscapeString ( $string )
+	{
+		$from = array ( '\\', '(',')','|','-','!','@','~','"','&', '/', '^', '$', '=' );
+		$to   = array ( '\\\\', '\(','\)','\|','\-','\!','\@','\~','\"', '\&', '\/', '\^', '\$', '\=' );
+
+		return str_replace ( $from, $to, $string );
+	}
+
+	/////////////////////////////////////////////////////////////////////////////
+	// attribute updates
+	/////////////////////////////////////////////////////////////////////////////
+
+	/// batch update given attributes in given rows in given indexes
+	/// returns amount of updated documents (0 or more) on success, or -1 on failure
+	function UpdateAttributes ( $index, $attrs, $values, $mva=false )
+	{
+		// verify everything
+		assert ( is_string($index) );
+		assert ( is_bool($mva) );
+
+		assert ( is_array($attrs) );
+		foreach ( $attrs as $attr )
+			assert ( is_string($attr) );
+
+		assert ( is_array($values) );
+		foreach ( $values as $id=>$entry )
+		{
+			assert ( is_numeric($id) );
+			assert ( is_array($entry) );
+			assert ( count($entry)==count($attrs) );
+			foreach ( $entry as $v )
+			{
+				if ( $mva )
+				{
+					assert ( is_array($v) );
+					foreach ( $v as $vv )
+						assert ( is_int($vv) );
+				} else
+					assert ( is_int($v) );
+			}
+		}
+
+		// build request
+		$this->_MBPush ();
+		$req = pack ( "N", strlen($index) ) . $index;
+
+		$req .= pack ( "N", count($attrs) );
+		foreach ( $attrs as $attr )
+		{
+			$req .= pack ( "N", strlen($attr) ) . $attr;
+			$req .= pack ( "N", $mva ? 1 : 0 );
+		}
+
+		$req .= pack ( "N", count($values) );
+		foreach ( $values as $id=>$entry )
+		{
+			$req .= sphPackU64 ( $id );
+			foreach ( $entry as $v )
+			{
+				$req .= pack ( "N", $mva ? count($v) : $v );
+				if ( $mva )
+					foreach ( $v as $vv )
+						$req .= pack ( "N", $vv );
+			}
+		}
+
+		// connect, send query, get response
+		if (!( $fp = $this->_Connect() ))
+		{
+			$this->_MBPop ();
+			return -1;
+		}
+
+		$len = strlen($req);
+		$req = pack ( "nnN", SEARCHD_COMMAND_UPDATE, VER_COMMAND_UPDATE, $len ) . $req; // add header
+		if ( !$this->_Send ( $fp, $req, $len+8 ) )
+		{
+			$this->_MBPop ();
+			return -1;
+		}
+
+		if (!( $response = $this->_GetResponse ( $fp, VER_COMMAND_UPDATE ) ))
+		{
+			$this->_MBPop ();
+			return -1;
+		}
+
+		// parse response
+		list(,$updated) = unpack ( "N*", substr ( $response, 0, 4 ) );
+		$this->_MBPop ();
+		return $updated;
+	}
+
+	/////////////////////////////////////////////////////////////////////////////
+	// persistent connections
+	/////////////////////////////////////////////////////////////////////////////
+
+	function Open()
+	{
+		if ( $this->_socket !== false )
+		{
+			$this->_error = 'already connected';
+			return false;
+		}
+		if ( !$fp = $this->_Connect() )
+			return false;
+
+		// command, command version = 0, body length = 4, body = 1
+		$req = pack ( "nnNN", SEARCHD_COMMAND_PERSIST, 0, 4, 1 );
+		if ( !$this->_Send ( $fp, $req, 12 ) )
+			return false;
+
+		$this->_socket = $fp;
+		return true;
+	}
+
+	function Close()
+	{
+		if ( $this->_socket === false )
+		{
+			$this->_error = 'not connected';
+			return false;
+		}
+
+		fclose ( $this->_socket );
+		$this->_socket = false;
+		
+		return true;
+	}
+
+	//////////////////////////////////////////////////////////////////////////
+	// status
+	//////////////////////////////////////////////////////////////////////////
+
+	function Status ()
+	{
+		$this->_MBPush ();
+		if (!( $fp = $this->_Connect() ))
+		{
+			$this->_MBPop();
+			return false;
+		}
+
+		$req = pack ( "nnNN", SEARCHD_COMMAND_STATUS, VER_COMMAND_STATUS, 4, 1 ); // len=4, body=1
+		if ( !( $this->_Send ( $fp, $req, 12 ) ) ||
+			 !( $response = $this->_GetResponse ( $fp, VER_COMMAND_STATUS ) ) )
+		{
+			$this->_MBPop ();
+			return false;
+		}
+
+		$res = substr ( $response, 4 ); // just ignore length, error handling, etc
+		$p = 0;
+		list ( $rows, $cols ) = array_values ( unpack ( "N*N*", substr ( $response, $p, 8 ) ) ); $p += 8;
+
+		$res = array();
+		for ( $i=0; $i<$rows; $i++ )
+			for ( $j=0; $j<$cols; $j++ )
+		{
+			list(,$len) = unpack ( "N*", substr ( $response, $p, 4 ) ); $p += 4;
+			$res[$i][] = substr ( $response, $p, $len ); $p += $len;
+		}
+
+		$this->_MBPop ();
+		return $res;
+	}
+
+	//////////////////////////////////////////////////////////////////////////
+	// flush
+	//////////////////////////////////////////////////////////////////////////
+
+	function FlushAttributes ()
+	{
+		$this->_MBPush ();
+		if (!( $fp = $this->_Connect() ))
+		{
+			$this->_MBPop();
+			return -1;
+		}
+
+		$req = pack ( "nnN", SEARCHD_COMMAND_FLUSHATTRS, VER_COMMAND_FLUSHATTRS, 0 ); // len=0
+		if ( !( $this->_Send ( $fp, $req, 8 ) ) ||
+			 !( $response = $this->_GetResponse ( $fp, VER_COMMAND_FLUSHATTRS ) ) )
+		{
+			$this->_MBPop ();
+			return -1;
+		}
+
+		$tag = -1;
+		if ( strlen($response)==4 )
+			list(,$tag) = unpack ( "N*", $response );
+		else
+			$this->_error = "unexpected response length";
+
+		$this->_MBPop ();
+		return $tag;
+	}
+}
+
+//
+// $Id: sphinxapi.php 3087 2012-01-30 23:07:35Z shodan $
+//
diff --git a/phpBB/includes/style/style.php b/phpBB/includes/style/style.php
index effd496fb9..4703c3a219 100644
--- a/phpBB/includes/style/style.php
+++ b/phpBB/includes/style/style.php
@@ -91,16 +91,22 @@ class phpbb_style
 	{
 		$style_path = $this->user->style['style_path'];
 		$style_dirs = ($this->user->style['style_parent_id']) ? array_reverse(explode('/', $this->user->style['style_parent_tree'])) : array();
-		$paths = array($this->get_style_path($style_path));
+
+		$names = array($style_path);
 		foreach ($style_dirs as $dir)
 		{
-			$paths[] = $this->get_style_path($dir);
+			$names[] = $dir;
 		}
+		// Add 'all' path, used as last fallback path by events and extensions
+		//$names[] = 'all';
 
-		// Add 'all' path, used as last fallback path by hooks and extensions
-		$paths[] = $this->get_style_path('all');
+		$paths = array();
+		foreach ($names as $name)
+		{
+			$paths[] = $this->get_style_path($name);
+		}
 
-		return $this->set_custom_style($style_path, $paths);
+		return $this->set_custom_style($style_path, $paths, $names);
 	}
 
 	/**
@@ -110,18 +116,27 @@ class phpbb_style
 	*
 	* @param string $name Name of style, used for cache prefix. Examples: "admin", "prosilver"
 	* @param array or string $paths Array of style paths, relative to current root directory
+	* @param array $names Array of names of templates in inheritance tree order, used by extensions. If empty, $name will be used.
 	* @param string $template_path Path to templates, relative to style directory. False if path should be set to default (templates/).
 	*/
-	public function set_custom_style($name, $paths, $template_path = false)
+	public function set_custom_style($name, $paths, $names = array(), $template_path = false)
 	{
 		if (is_string($paths))
 		{
 			$paths = array($paths);
 		}
 
+		if (empty($names))
+		{
+			$names = array($name);
+		}
+		$this->names = $names;
+
 		$this->provider->set_styles($paths);
 		$this->locator->set_paths($this->provider);
 
+		$this->template->set_style_names($names);
+
 		if ($template_path !== false)
 		{
 			$this->locator->set_template_path($template_path);
diff --git a/phpBB/includes/template/compile.php b/phpBB/includes/template/compile.php
index 22da21820e..fcdaf7abda 100644
--- a/phpBB/includes/template/compile.php
+++ b/phpBB/includes/template/compile.php
@@ -35,16 +35,23 @@ class phpbb_template_compile
 	/**
 	* Constructor.
 	*
-	* @param bool @allow_php Whether PHP code will be allowed in templates (inline PHP code, PHP tag and INCLUDEPHP tag)
+	* @param bool $allow_php Whether PHP code will be allowed in templates (inline PHP code, PHP tag and INCLUDEPHP tag)
+	* @param array $style_names Name of style to which the template being compiled belongs and parents in style tree order
 	* @param phpbb_style_resource_locator $locator Resource locator
 	* @param string $phpbb_root_path Path to phpBB root directory
+	* @param phpbb_extension_manager $extension_manager Extension manager to use for finding template fragments in extensions; if null, template events will not be invoked
+	* @param phpbb_user $user Current user
 	*/
-	public function __construct($allow_php, $locator, $phpbb_root_path)
+	public function __construct($allow_php, $style_names, $locator, $phpbb_root_path, $extension_manager = null, $user = null)
 	{
 		$this->filter_params = array(
 			'allow_php'	=> $allow_php,
+			'style_names'	=> $style_names,
 			'locator'	=> $locator,
-			'phpbb_root_path'	=> $phpbb_root_path
+			'phpbb_root_path'	=> $phpbb_root_path,
+			'extension_manager'	=> $extension_manager,
+			'user'          => $user,
+			'template_compile'	=> $this,
 		);
 	}
 
diff --git a/phpBB/includes/template/filter.php b/phpBB/includes/template/filter.php
index 66d28242a3..f73ad28ba1 100644
--- a/phpBB/includes/template/filter.php
+++ b/phpBB/includes/template/filter.php
@@ -88,6 +88,37 @@ class phpbb_template_filter extends php_user_filter
 	private $phpbb_root_path;
 
 	/**
+	* Name of the style that the template being compiled and/or rendered
+	* belongs to, and its parents, in inheritance tree order.
+	*
+	* Used to invoke style-specific template events.
+	*
+	* @var array
+	*/
+	private $style_names;
+
+	/**
+	* Extension manager.
+	*
+	* @var phpbb_extension_manager
+	*/
+	private $extension_manager;
+
+	/**
+	* Current user
+	*
+	* @var phpbb_user
+	*/
+	private $user;
+
+	/**
+	* Template compiler.
+	*
+	* @var phpbb_template_compile
+	*/
+	private $template_compile;
+
+	/**
 	* Stream filter
 	*
 	* Is invoked for evey chunk of the stream, allowing us
@@ -138,8 +169,10 @@ class phpbb_template_filter extends php_user_filter
 	/**
 	* Initializer, called on creation.
 	*
-	* Get the allow_php option, root directory and locator from params,
+	* Get the allow_php option, style_names, root directory and locator from params,
 	* which are passed to stream_filter_append.
+	*
+	* @return boolean Returns true
 	*/
 	public function onCreate()
 	{
@@ -148,6 +181,13 @@ class phpbb_template_filter extends php_user_filter
 		$this->allow_php = $this->params['allow_php'];
 		$this->locator = $this->params['locator'];
 		$this->phpbb_root_path = $this->params['phpbb_root_path'];
+		$this->style_names = $this->params['style_names'];
+		$this->extension_manager = $this->params['extension_manager'];
+		if (isset($this->params['user']))
+		{
+			$this->user = $this->params['user'];
+		}
+		$this->template_compile = $this->params['template_compile'];
 		return true;
 	}
 
@@ -229,7 +269,9 @@ class phpbb_template_filter extends php_user_filter
 	}
 
 	/**
-	* Callback for replacing matched tokens with PHP code
+	* Callback for replacing matched tokens with compiled template code.
+	*
+	* Compiled template code is an HTML stream with embedded PHP.
 	*
 	* @param array $matches Regular expression matches
 	* @return string compiled template code
@@ -317,6 +359,10 @@ class phpbb_template_filter extends php_user_filter
 				return '<!-- ENDPHP -->';
 			break;
 
+			case 'EVENT':
+				return '<?php ' . $this->compile_tag_event($matches[2]) . '?>';
+			break;
+
 			default:
 				return $matches[0];
 			break;
@@ -836,6 +882,97 @@ class phpbb_template_filter extends php_user_filter
 	}
 
 	/**
+	* Compile EVENT tag.
+	*
+	* $tag_args should be a single string identifying the event.
+	* The event name can contain letters, numbers and underscores only.
+	* If an invalid event name is specified, an E_USER_ERROR will be
+	* triggered.
+	*
+	* Event tags are only functional when the template engine has
+	* an instance of the extension manager. Extension manager would
+	* be called upon to find all extensions listening for the specified
+	* event, and to obtain additional template fragments. All such
+	* template fragments will be compiled and included in the generated
+	* compiled template code for the current template being compiled.
+	*
+	* The above means that whenever an extension is enabled or disabled,
+	* template cache should be cleared in order to update the compiled
+	* template code for the active set of template event listeners.
+	*
+	* This also means that extensions cannot return different template
+	* fragments at different times. Once templates are compiled, changing
+	* such template fragments would have no effect.
+	*
+	* @param string $tag_args EVENT tag arguments, as a string - for EVENT this is the event name
+	* @return string compiled template code
+	*/
+	private function compile_tag_event($tag_args)
+	{
+		if (!preg_match('/^\w+$/', $tag_args))
+		{
+			// The event location is improperly formatted,
+			if ($this->user)
+			{
+				trigger_error($this->user->lang('ERR_TEMPLATE_EVENT_LOCATION', $tag_args), E_USER_ERROR);
+			}
+			else
+			{
+				trigger_error(sprintf('The specified template event location <em>[%s]</em> is improperly formatted.', $tag_args), E_USER_ERROR);
+			}
+		}
+		$location = $tag_args;
+
+		if ($this->extension_manager)
+		{
+			$finder = $this->extension_manager->get_finder();
+
+			$files = $finder
+				->extension_prefix($location)
+				->extension_suffix('.html')
+				->extension_directory("/styles/all/template")
+				->get_files();
+
+			foreach ($this->style_names as $style_name)
+			{
+				$more_files = $finder
+					->extension_prefix($location)
+					->extension_suffix('.html')
+					->extension_directory("/styles/" . $style_name . "/template")
+					->get_files();
+				if (!empty($more_files))
+				{
+					$files = array_merge($files, $more_files);
+					break;
+				}
+			}
+
+			$all_compiled = '';
+			foreach ($files as $file)
+			{
+				$compiled = $this->template_compile->compile_file($file);
+
+				if ($compiled === false)
+				{
+					if ($this->user)
+					{
+						trigger_error($this->user->lang('ERR_TEMPLATE_COMPILATION', phpbb_filter_root_path($file)), E_USER_ERROR);
+					}
+					else
+					{
+						trigger_error(sprintf('The file could not be compiled: %s', phpbb_filter_root_path($file)), E_USER_ERROR);
+					}
+				}
+
+				$all_compiled .= $compiled;
+			}
+			// Need spaces inside php tags as php cannot grok
+			// < ?php? > sans the spaces
+			return ' ?' . '>' . $all_compiled . '<?php ';
+		}
+	}
+
+	/**
 	* parse expression
 	* This is from Smarty
 	*/
diff --git a/phpBB/includes/template/locator.php b/phpBB/includes/template/locator.php
index 42db91efb2..f6fd20bcc2 100644
--- a/phpBB/includes/template/locator.php
+++ b/phpBB/includes/template/locator.php
@@ -39,7 +39,7 @@ interface phpbb_template_locator
 	* Sets the template filenames for handles. $filename_array
 	* should be a hash of handle => filename pairs.
 	*
-	* @param array $filname_array Should be a hash of handle => filename pairs.
+	* @param array $filename_array Should be a hash of handle => filename pairs.
 	*/
 	public function set_filenames(array $filename_array);
 
@@ -66,7 +66,7 @@ interface phpbb_template_locator
 	* returns actually exists, it is faster than get_source_file_for_handle.
 	*
 	* Use get_source_file_for_handle to obtain the actual path that is
-	* guaranteed to exist (which might come from the parent style 
+	* guaranteed to exist (which might come from the parent style
 	* directory if primary style has parent styles).
 	*
 	* This function will trigger an error if the handle was never
diff --git a/phpBB/includes/template/template.php b/phpBB/includes/template/template.php
index 5396ddbfad..bbec768613 100644
--- a/phpBB/includes/template/template.php
+++ b/phpBB/includes/template/template.php
@@ -75,14 +75,32 @@ class phpbb_template
 	private $locator;
 
 	/**
+	* Extension manager.
+	*
+	* @var phpbb_extension_manager
+	*/
+	private $extension_manager;
+
+	/**
+	* Name of the style that the template being compiled and/or rendered
+	* belongs to, and its parents, in inheritance tree order.
+	*
+	* Used to invoke style-specific template events.
+	*
+	* @var array
+	*/
+	private $style_names;
+
+	/**
 	* Constructor.
 	*
 	* @param string $phpbb_root_path phpBB root path
 	* @param user $user current user
 	* @param phpbb_template_locator $locator template locator
 	* @param phpbb_template_context $context template context
+	* @param phpbb_extension_manager $extension_manager extension manager, if null then template events will not be invoked
 	*/
-	public function __construct($phpbb_root_path, $php_ext, $config, $user, phpbb_template_locator $locator, phpbb_template_context $context)
+	public function __construct($phpbb_root_path, $php_ext, $config, $user, phpbb_template_locator $locator, phpbb_template_context $context, phpbb_extension_manager $extension_manager = null)
 	{
 		$this->phpbb_root_path = $phpbb_root_path;
 		$this->php_ext = $php_ext;
@@ -90,12 +108,13 @@ class phpbb_template
 		$this->user = $user;
 		$this->locator = $locator;
 		$this->context = $context;
+		$this->extension_manager = $extension_manager;
 	}
 
 	/**
 	* Sets the template filenames for handles.
 	*
-	* @param array $filname_array Should be a hash of handle => filename pairs.
+	* @param array $filename_array Should be a hash of handle => filename pairs.
 	*/
 	public function set_filenames(array $filename_array)
 	{
@@ -105,6 +124,18 @@ class phpbb_template
 	}
 
 	/**
+	* Sets the style names corresponding to style hierarchy being compiled
+	* and/or rendered.
+	*
+	* @param array $style_names List of style names in inheritance tree order
+	* @return null
+	*/
+	public function set_style_names(array $style_names)
+	{
+		$this->style_names = $style_names;
+	}
+
+	/**
 	* Clears all variables and blocks assigned to this template.
 	*/
 	public function destroy()
@@ -282,7 +313,7 @@ class phpbb_template
 			return new phpbb_template_renderer_include($output_file, $this);
 		}
 
-		$compile = new phpbb_template_compile($this->config['tpl_allow_php'], $this->locator, $this->phpbb_root_path);
+		$compile = new phpbb_template_compile($this->config['tpl_allow_php'], $this->style_names, $this->locator, $this->phpbb_root_path, $this->extension_manager, $this->user);
 
 		if ($compile->compile_file_to_file($source_file, $output_file) !== false)
 		{
diff --git a/phpBB/includes/ucp/info/ucp_profile.php b/phpBB/includes/ucp/info/ucp_profile.php
index 201216e9fd..3581a7f533 100644
--- a/phpBB/includes/ucp/info/ucp_profile.php
+++ b/phpBB/includes/ucp/info/ucp_profile.php
@@ -19,7 +19,7 @@ class ucp_profile_info
 			'title'		=> 'UCP_PROFILE',
 			'version'	=> '1.0.0',
 			'modes'		=> array(
-				'profile_info'	=> array('title' => 'UCP_PROFILE_PROFILE_INFO', 'auth' => '', 'cat' => array('UCP_PROFILE')),
+				'profile_info'	=> array('title' => 'UCP_PROFILE_PROFILE_INFO', 'auth' => 'acl_u_chgprofileinfo', 'cat' => array('UCP_PROFILE')),
 				'signature'		=> array('title' => 'UCP_PROFILE_SIGNATURE', 'auth' => 'acl_u_sig', 'cat' => array('UCP_PROFILE')),
 				'avatar'		=> array('title' => 'UCP_PROFILE_AVATAR', 'auth' => 'cfg_allow_avatar && (cfg_allow_avatar_local || cfg_allow_avatar_remote || cfg_allow_avatar_upload || cfg_allow_avatar_remote_upload)', 'cat' => array('UCP_PROFILE')),
 				'reg_details'	=> array('title' => 'UCP_PROFILE_REG_DETAILS', 'auth' => '', 'cat' => array('UCP_PROFILE')),
diff --git a/phpBB/includes/ucp/ucp_activate.php b/phpBB/includes/ucp/ucp_activate.php
index a0d0baf10f..577761dfde 100644
--- a/phpBB/includes/ucp/ucp_activate.php
+++ b/phpBB/includes/ucp/ucp_activate.php
@@ -50,7 +50,7 @@ class ucp_activate
 			trigger_error('ALREADY_ACTIVATED');
 		}
 
-		if (($user_row['user_inactive_reason'] ==  INACTIVE_MANUAL) || $user_row['user_actkey'] != $key)
+		if ($user_row['user_inactive_reason'] == INACTIVE_MANUAL || $user_row['user_actkey'] !== $key)
 		{
 			trigger_error('WRONG_ACTIVATION');
 		}
diff --git a/phpBB/includes/ucp/ucp_groups.php b/phpBB/includes/ucp/ucp_groups.php
index 9652986cf2..b9a06bc3b4 100644
--- a/phpBB/includes/ucp/ucp_groups.php
+++ b/phpBB/includes/ucp/ucp_groups.php
@@ -25,7 +25,7 @@ class ucp_groups
 
 	function main($id, $mode)
 	{
-		global $config, $phpbb_root_path, $phpEx;
+		global $config, $phpbb_root_path, $phpEx, $phpbb_admin_path;
 		global $db, $user, $auth, $cache, $template;
 		global $request;
 
@@ -438,7 +438,7 @@ class ucp_groups
 					$group_name = $group_row['group_name'];
 					$group_type = $group_row['group_type'];
 
-					$avatar_img = (!empty($group_row['group_avatar'])) ? get_user_avatar($group_row['group_avatar'], $group_row['group_avatar_type'], $group_row['group_avatar_width'], $group_row['group_avatar_height'], 'GROUP_AVATAR') : '<img src="' . $phpbb_root_path . 'adm/images/no_avatar.gif" alt="" />';
+					$avatar_img = (!empty($group_row['group_avatar'])) ? get_user_avatar($group_row['group_avatar'], $group_row['group_avatar_type'], $group_row['group_avatar_width'], $group_row['group_avatar_height'], 'GROUP_AVATAR') : '<img src="' . $phpbb_admin_path . 'images/no_avatar.gif" alt="" />';
 
 					$template->assign_vars(array(
 						'GROUP_NAME'			=> ($group_type == GROUP_SPECIAL) ? $user->lang['G_' . $group_name] : $group_name,
@@ -618,7 +618,7 @@ class ucp_groups
 
 								foreach ($test_variables as $test => $type)
 								{
-									if (isset($submit_ary[$test]) && ($action == 'add' || $group_row['group_' . $test] != $submit_ary[$test]))
+									if (isset($submit_ary[$test]) && ($action == 'add' || $group_row['group_' . $test] != $submit_ary[$test] || isset($group_attributes['group_avatar']) && strpos($test, 'avatar') === 0))
 									{
 										settype($submit_ary[$test], $type);
 										$group_attributes['group_' . $test] = $group_row['group_' . $test] = $submit_ary[$test];
@@ -730,7 +730,7 @@ class ucp_groups
 							'GROUP_CLOSED'		=> $type_closed,
 							'GROUP_HIDDEN'		=> $type_hidden,
 
-							'U_SWATCH'			=> append_sid("{$phpbb_root_path}adm/swatch.$phpEx", 'form=ucp&amp;name=group_colour'),
+							'U_SWATCH'			=> append_sid("{$phpbb_admin_path}swatch.$phpEx", 'form=ucp&amp;name=group_colour'),
 							'S_UCP_ACTION'		=> $this->u_action . "&amp;action=$action&amp;g=$group_id",
 							'L_AVATAR_EXPLAIN'	=> phpbb_avatar_explanation_string(),
 						));
diff --git a/phpBB/includes/ucp/ucp_pm_compose.php b/phpBB/includes/ucp/ucp_pm_compose.php
index 5577e8dab3..c2d12d17c2 100644
--- a/phpBB/includes/ucp/ucp_pm_compose.php
+++ b/phpBB/includes/ucp/ucp_pm_compose.php
@@ -353,7 +353,7 @@ function compose_pm($id, $mode, $action, $user_folders = array())
 		$message_attachment = 0;
 		$message_text = $message_subject = '';
 
-		if ($to_user_id && $action == 'post')
+		if ($to_user_id && $to_user_id != ANONYMOUS && $action == 'post')
 		{
 			$address_list['u'][$to_user_id] = 'to';
 		}
diff --git a/phpBB/includes/ucp/ucp_profile.php b/phpBB/includes/ucp/ucp_profile.php
index 89bf20a30f..e7cea06a45 100644
--- a/phpBB/includes/ucp/ucp_profile.php
+++ b/phpBB/includes/ucp/ucp_profile.php
@@ -251,6 +251,11 @@ class ucp_profile
 			break;
 
 			case 'profile_info':
+				// Do not display profile information panel if not authed to do so
+				if (!$auth->acl_get('u_chgprofileinfo'))
+				{
+					trigger_error('NO_AUTH_PROFILEINFO');
+				}
 
 				include($phpbb_root_path . 'includes/functions_profile_fields.' . $phpEx);
author	Joas Schilling <nickvergessen@gmx.de>	2013-02-25 21:03:34 +0100
committer	Joas Schilling <nickvergessen@gmx.de>	2013-02-25 21:03:34 +0100
commit	8c6a1e50f502385c2d75920dd4914928d8311b80 (patch)
tree	57a8e6af9ec0077323054aa93151e0a9c048dfb4 /phpBB/includes
parent	1d7b082a6fa05d5760ef15ef8bf78cd3a1d204cf (diff)
parent	9b38c4579e80a9013b6ecad71fce38e930b67838 (diff)
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