5 files changed, 131 insertions, 226 deletions
diff --git a/phpBB/includes/acp/acp_attachments.php b/phpBB/includes/acp/acp_attachments.php
index 94e3660de8..feeccbe853 100644
--- a/phpBB/includes/acp/acp_attachments.php
+++ b/phpBB/includes/acp/acp_attachments.php
@@ -610,7 +610,6 @@ class acp_attachments
 				$cat_lang = array(
 					ATTACHMENT_CATEGORY_NONE		=> $user->lang['NO_FILE_CAT'],
 					ATTACHMENT_CATEGORY_IMAGE		=> $user->lang['CAT_IMAGES'],
-					ATTACHMENT_CATEGORY_FLASH		=> $user->lang['CAT_FLASH_FILES'],
 				);
 
 				$group_id = $request->variable('g', 0);
@@ -1385,7 +1384,6 @@ class acp_attachments
 		$types = array(
 			ATTACHMENT_CATEGORY_NONE		=> $user->lang['NO_FILE_CAT'],
 			ATTACHMENT_CATEGORY_IMAGE		=> $user->lang['CAT_IMAGES'],
-			ATTACHMENT_CATEGORY_FLASH		=> $user->lang['CAT_FLASH_FILES'],
 		);
 
 		if ($group_id)
diff --git a/phpBB/includes/acp/acp_bbcodes.php b/phpBB/includes/acp/acp_bbcodes.php
index 1f7374a07f..b59f9e3a39 100644
--- a/phpBB/includes/acp/acp_bbcodes.php
+++ b/phpBB/includes/acp/acp_bbcodes.php
@@ -451,144 +451,7 @@ class acp_bbcodes
 	function build_regexp(&$bbcode_match, &$bbcode_tpl)
 	{
 		$bbcode_match = trim($bbcode_match);
-		$bbcode_tpl = trim($bbcode_tpl);
-
-		// Allow unicode characters for URL|LOCAL_URL|RELATIVE_URL|INTTEXT tokens
-		$utf8 = preg_match('/(URL|LOCAL_URL|RELATIVE_URL|INTTEXT)/', $bbcode_match);
-
-		$fp_match = preg_quote($bbcode_match, '!');
-		$fp_replace = preg_replace('#^\[(.*?)\]#', '[$1:$uid]', $bbcode_match);
-		$fp_replace = preg_replace('#\[/(.*?)\]$#', '[/$1:$uid]', $fp_replace);
-
-		$sp_match = preg_quote($bbcode_match, '!');
-		$sp_match = preg_replace('#^\\\\\[(.*?)\\\\\]#', '\[$1:$uid\]', $sp_match);
-		$sp_match = preg_replace('#\\\\\[/(.*?)\\\\\]$#', '\[/$1:$uid\]', $sp_match);
-		$sp_replace = $bbcode_tpl;
-
-		// @todo Make sure to change this too if something changed in message parsing
-		$tokens = array(
-			'URL'	 => array(
-				'!(?:(' . str_replace(array('!', '\#'), array('\!', '#'), get_preg_expression('url')) . ')|(' . str_replace(array('!', '\#'), array('\!', '#'), get_preg_expression('www_url')) . '))!ie'	=>	"\$this->bbcode_specialchars(('\$1') ? '\$1' : 'http://\$2')"
-			),
-			'LOCAL_URL'	 => array(
-				'!(' . str_replace(array('!', '\#'), array('\!', '#'), get_preg_expression('relative_url')) . ')!e'	=>	"\$this->bbcode_specialchars('$1')"
-			),
-			'RELATIVE_URL'	=> array(
-				'!(' . str_replace(array('!', '\#'), array('\!', '#'), get_preg_expression('relative_url')) . ')!e'	=>	"\$this->bbcode_specialchars('$1')"
-			),
-			'EMAIL' => array(
-				'!(' . get_preg_expression('email') . ')!ie'	=>	"\$this->bbcode_specialchars('$1')"
-			),
-			'TEXT' => array(
-				'!(.*?)!es'	 =>	"str_replace(array(\"\\r\\n\", '\\\"', '\\'', '(', ')'), array(\"\\n\", '\"', '&#39;', '&#40;', '&#41;'), trim('\$1'))"
-			),
-			'SIMPLETEXT' => array(
-				'!([a-zA-Z0-9-+.,_ ]+)!'	 =>	"$1"
-			),
-			'INTTEXT' => array(
-				'!([\p{L}\p{N}\-+,_. ]+)!u'	 =>	"$1"
-			),
-			'IDENTIFIER' => array(
-				'!([a-zA-Z0-9-_]+)!'	 =>	"$1"
-			),
-			'COLOR' => array(
-				'!([a-z]+|#[0-9abcdef]+)!i'	=>	'$1'
-			),
-			'NUMBER' => array(
-				'!([0-9]+)!'	=>	'$1'
-			)
-		);
-
-		$sp_tokens = array(
-			'URL'	 => '(?i)((?:' . str_replace(array('!', '\#'), array('\!', '#'), get_preg_expression('url')) . ')|(?:' . str_replace(array('!', '\#'), array('\!', '#'), get_preg_expression('www_url')) . '))(?-i)',
-			'LOCAL_URL'	 => '(?i)(' . str_replace(array('!', '\#'), array('\!', '#'), get_preg_expression('relative_url')) . ')(?-i)',
-			'RELATIVE_URL'	 => '(?i)(' . str_replace(array('!', '\#'), array('\!', '#'), get_preg_expression('relative_url')) . ')(?-i)',
-			'EMAIL' => '(' . get_preg_expression('email') . ')',
-			'TEXT' => '(.*?)',
-			'SIMPLETEXT' => '([a-zA-Z0-9-+.,_ ]+)',
-			'INTTEXT' => '([\p{L}\p{N}\-+,_. ]+)',
-			'IDENTIFIER' => '([a-zA-Z0-9-_]+)',
-			'COLOR' => '([a-zA-Z]+|#[0-9abcdefABCDEF]+)',
-			'NUMBER' => '([0-9]+)',
-		);
-
-		$pad = 0;
-		$modifiers = 'i';
-		$modifiers .= ($utf8) ? 'u' : '';
-
-		if (preg_match_all('/\{(' . implode('|', array_keys($tokens)) . ')[0-9]*\}/i', $bbcode_match, $m))
-		{
-			foreach ($m[0] as $n => $token)
-			{
-				$token_type = $m[1][$n];
-
-				reset($tokens[strtoupper($token_type)]);
-				list($match, $replace) = each($tokens[strtoupper($token_type)]);
-
-				// Pad backreference numbers from tokens
-				if (preg_match_all('/(?<!\\\\)\$([0-9]+)/', $replace, $repad))
-				{
-					$repad = $pad + count(array_unique($repad[0]));
-					$replace = preg_replace_callback('/(?<!\\\\)\$([0-9]+)/', function ($match) use ($pad) {
-						return '${' . ($match[1] + $pad) . '}';
-					}, $replace);
-					$pad = $repad;
-				}
-
-				// Obtain pattern modifiers to use and alter the regex accordingly
-				$regex = preg_replace('/!(.*)!([a-z]*)/', '$1', $match);
-				$regex_modifiers = preg_replace('/!(.*)!([a-z]*)/', '$2', $match);
-
-				for ($i = 0, $size = strlen($regex_modifiers); $i < $size; ++$i)
-				{
-					if (strpos($modifiers, $regex_modifiers[$i]) === false)
-					{
-						$modifiers .= $regex_modifiers[$i];
-
-						if ($regex_modifiers[$i] == 'e')
-						{
-							$fp_replace = "'" . str_replace("'", "\\'", $fp_replace) . "'";
-						}
-					}
-
-					if ($regex_modifiers[$i] == 'e')
-					{
-						$replace = "'.$replace.'";
-					}
-				}
-
-				$fp_match = str_replace(preg_quote($token, '!'), $regex, $fp_match);
-				$fp_replace = str_replace($token, $replace, $fp_replace);
-
-				$sp_match = str_replace(preg_quote($token, '!'), $sp_tokens[$token_type], $sp_match);
-
-				// Prepend the board url to local relative links
-				$replace_prepend = ($token_type === 'LOCAL_URL') ? generate_board_url() . '/' : '';
-
-				$sp_replace = str_replace($token, $replace_prepend . '${' . ($n + 1) . '}', $sp_replace);
-			}
-
-			$fp_match = '!' . $fp_match . '!' . $modifiers;
-			$sp_match = '!' . $sp_match . '!s' . (($utf8) ? 'u' : '');
-
-			if (strpos($fp_match, 'e') !== false)
-			{
-				$fp_replace = str_replace("'.'", '', $fp_replace);
-				$fp_replace = str_replace(".''.", '.', $fp_replace);
-			}
-		}
-		else
-		{
-			// No replacement is present, no need for a second-pass pattern replacement
-			// A simple str_replace will suffice
-			$fp_match = '!' . $fp_match . '!' . $modifiers;
-			$sp_match = $fp_replace;
-			$sp_replace = '';
-		}
-
-		// Lowercase tags
 		$bbcode_tag = preg_replace('/.*?\[([a-z0-9_-]+).*/i', '$1', $bbcode_match);
-		$bbcode_search = preg_replace('/.*?\[([a-z0-9_-]+).*/i', '$1', $bbcode_match);
 
 		if (!preg_match('/^[a-zA-Z0-9_-]+$/', $bbcode_tag))
 		{
@@ -596,25 +459,13 @@ class acp_bbcodes
 			trigger_error($user->lang['BBCODE_INVALID'] . adm_back_link($this->u_action), E_USER_WARNING);
 		}
 
-		$fp_match = preg_replace_callback('#\[/?' . $bbcode_search . '#i', function ($match) {
-			return strtolower($match[0]);
-		}, $fp_match);
-		$fp_replace = preg_replace_callback('#\[/?' . $bbcode_search . '#i', function ($match) {
-			return strtolower($match[0]);
-		}, $fp_replace);
-		$sp_match = preg_replace_callback('#\[/?' . $bbcode_search . '#i', function ($match) {
-			return strtolower($match[0]);
-		}, $sp_match);
-		$sp_replace = preg_replace_callback('#\[/?' . $bbcode_search . '#i', function ($match) {
-			return strtolower($match[0]);
-		}, $sp_replace);
-
 		return array(
 			'bbcode_tag'				=> $bbcode_tag,
-			'first_pass_match'			=> $fp_match,
-			'first_pass_replace'		=> $fp_replace,
-			'second_pass_match'			=> $sp_match,
-			'second_pass_replace'		=> $sp_replace
+			'first_pass_match'			=> '/(?!)/',
+			'first_pass_replace'		=> '',
+			// Use a non-matching, valid regexp to effectively disable this BBCode
+			'second_pass_match'			=> '/(?!)/',
+			'second_pass_replace'		=> ''
 		);
 	}
 }
diff --git a/phpBB/includes/acp/acp_board.php b/phpBB/includes/acp/acp_board.php
index e348c769bd..083bd5adac 100644
--- a/phpBB/includes/acp/acp_board.php
+++ b/phpBB/includes/acp/acp_board.php
@@ -85,34 +85,25 @@ class acp_board
 				$display_vars = array(
 					'title'	=> 'ACP_BOARD_FEATURES',
 					'vars'	=> array(
-						'legend1'				=> 'ACP_BOARD_FEATURES',
-						'allow_privmsg'			=> array('lang' => 'BOARD_PM',				'validate' => 'bool',	'type' => 'radio:yes_no', 'explain' => true),
-						'allow_topic_notify'	=> array('lang' => 'ALLOW_TOPIC_NOTIFY',	'validate' => 'bool',	'type' => 'radio:yes_no', 'explain' => false),
-						'allow_forum_notify'	=> array('lang' => 'ALLOW_FORUM_NOTIFY',	'validate' => 'bool',	'type' => 'radio:yes_no', 'explain' => false),
-						'allow_namechange'		=> array('lang' => 'ALLOW_NAME_CHANGE',		'validate' => 'bool',	'type' => 'radio:yes_no', 'explain' => false),
-						'allow_attachments'		=> array('lang' => 'ALLOW_ATTACHMENTS',		'validate' => 'bool',	'type' => 'radio:yes_no', 'explain' => false),
-						'allow_pm_attach'		=> array('lang' => 'ALLOW_PM_ATTACHMENTS',	'validate' => 'bool',	'type' => 'radio:yes_no', 'explain' => false),
-						'allow_pm_report'		=> array('lang' => 'ALLOW_PM_REPORT',		'validate' => 'bool',	'type' => 'radio:yes_no', 'explain' => true),
-						'allow_bbcode'			=> array('lang' => 'ALLOW_BBCODE',			'validate' => 'bool',	'type' => 'radio:yes_no', 'explain' => false),
-						'allow_smilies'			=> array('lang' => 'ALLOW_SMILIES',			'validate' => 'bool',	'type' => 'radio:yes_no', 'explain' => false),
-						'allow_sig'				=> array('lang' => 'ALLOW_SIG',				'validate' => 'bool',	'type' => 'radio:yes_no', 'explain' => false),
+						'legend1'						=> 'ACP_BOARD_FEATURES',
+						'allow_privmsg'					=> array('lang' => 'BOARD_PM',						'validate' => 'bool',	'type' => 'radio:yes_no', 'explain' => true),
+						'allow_topic_notify'			=> array('lang' => 'ALLOW_TOPIC_NOTIFY',			'validate' => 'bool',	'type' => 'radio:yes_no', 'explain' => false),
+						'allow_forum_notify'			=> array('lang' => 'ALLOW_FORUM_NOTIFY',			'validate' => 'bool',	'type' => 'radio:yes_no', 'explain' => false),
+						'allow_namechange'				=> array('lang' => 'ALLOW_NAME_CHANGE',				'validate' => 'bool',	'type' => 'radio:yes_no', 'explain' => false),
+						'allow_attachments'				=> array('lang' => 'ALLOW_ATTACHMENTS',				'validate' => 'bool',	'type' => 'radio:yes_no', 'explain' => false),
+						'allow_pm_attach'				=> array('lang' => 'ALLOW_PM_ATTACHMENTS',			'validate' => 'bool',	'type' => 'radio:yes_no', 'explain' => false),
+						'allow_pm_report'				=> array('lang' => 'ALLOW_PM_REPORT',				'validate' => 'bool',	'type' => 'radio:yes_no', 'explain' => true),
+						'allow_bbcode'					=> array('lang' => 'ALLOW_BBCODE',					'validate' => 'bool',	'type' => 'radio:yes_no', 'explain' => false),
+						'allow_smilies'					=> array('lang' => 'ALLOW_SMILIES',					'validate' => 'bool',	'type' => 'radio:yes_no', 'explain' => false),
+						'allow_sig'						=> array('lang' => 'ALLOW_SIG',						'validate' => 'bool',	'type' => 'radio:yes_no', 'explain' => false),
 						'allow_board_notifications'		=> array('lang' => 'ALLOW_BOARD_NOTIFICATIONS',		'validate' => 'bool',	'type' => 'radio:yes_no', 'explain' => false),
-						'allow_nocensors'		=> array('lang' => 'ALLOW_NO_CENSORS',		'validate' => 'bool',	'type' => 'radio:yes_no', 'explain' => true),
-						'allow_bookmarks'		=> array('lang' => 'ALLOW_BOOKMARKS',		'validate' => 'bool',	'type' => 'radio:yes_no', 'explain' => true),
-						'allow_birthdays'		=> array('lang' => 'ALLOW_BIRTHDAYS',		'validate' => 'bool',	'type' => 'radio:yes_no', 'explain' => true),
-						'display_last_subject'	=> array('lang' => 'DISPLAY_LAST_SUBJECT',		'validate' => 'bool',	'type' => 'radio:yes_no', 'explain' => true),
-						'allow_quick_reply'		=> array('lang' => 'ALLOW_QUICK_REPLY',		'validate' => 'bool',	'type' => 'custom', 'method' => 'quick_reply', 'explain' => true),
-
-						'legend2'				=> 'ACP_LOAD_SETTINGS',
-						'load_birthdays'		=> array('lang' => 'YES_BIRTHDAYS',			'validate' => 'bool',	'type' => 'radio:yes_no', 'explain' => true),
-						'load_moderators'		=> array('lang' => 'YES_MODERATORS',		'validate' => 'bool',	'type' => 'radio:yes_no', 'explain' => false),
-						'load_jumpbox'			=> array('lang' => 'YES_JUMPBOX',			'validate' => 'bool',	'type' => 'radio:yes_no', 'explain' => false),
-						'load_cpf_memberlist'	=> array('lang' => 'LOAD_CPF_MEMBERLIST',	'validate' => 'bool',	'type' => 'radio:yes_no', 'explain' => false),
-						'load_cpf_pm'			=> array('lang' => 'LOAD_CPF_PM',			'validate' => 'bool',	'type' => 'radio:yes_no', 'explain'	=> false),
-						'load_cpf_viewprofile'	=> array('lang' => 'LOAD_CPF_VIEWPROFILE',	'validate' => 'bool',	'type' => 'radio:yes_no', 'explain' => false),
-						'load_cpf_viewtopic'	=> array('lang' => 'LOAD_CPF_VIEWTOPIC',	'validate' => 'bool',	'type' => 'radio:yes_no', 'explain' => false),
+						'allow_nocensors'				=> array('lang' => 'ALLOW_NO_CENSORS',				'validate' => 'bool',	'type' => 'radio:yes_no', 'explain' => true),
+						'allow_bookmarks'				=> array('lang' => 'ALLOW_BOOKMARKS',				'validate' => 'bool',	'type' => 'radio:yes_no', 'explain' => true),
+						'allow_birthdays'				=> array('lang' => 'ALLOW_BIRTHDAYS',				'validate' => 'bool',	'type' => 'radio:yes_no', 'explain' => true),
+						'display_last_subject'			=> array('lang' => 'DISPLAY_LAST_SUBJECT',			'validate' => 'bool',	'type' => 'radio:yes_no', 'explain' => true),
+						'allow_quick_reply'				=> array('lang' => 'ALLOW_QUICK_REPLY',				'validate' => 'bool',	'type' => 'custom', 'method' => 'quick_reply', 'explain' => true),
 
-						'legend3'					=> 'ACP_SUBMIT_CHANGES',
+						'legend2'							=> 'ACP_SUBMIT_CHANGES',
 					)
 				);
 			break;
diff --git a/phpBB/includes/acp/acp_extensions.php b/phpBB/includes/acp/acp_extensions.php
index a1cb2108e7..2929de3c4f 100644
--- a/phpBB/includes/acp/acp_extensions.php
+++ b/phpBB/includes/acp/acp_extensions.php
@@ -38,7 +38,7 @@ class acp_extensions
 	private $phpbb_container;
 	private $php_ini;
 
-	function main()
+	function main($id, $mode)
 	{
 		// Start the page
 		global $config, $user, $template, $request, $phpbb_extension_manager, $phpbb_root_path, $phpbb_log, $phpbb_dispatcher, $phpbb_container;
@@ -182,13 +182,19 @@ class acp_extensions
 					redirect($this->u_action);
 				}
 
-				$this->tpl_name = 'acp_ext_enable';
-
-				$this->template->assign_vars(array(
-					'PRE'				=> true,
-					'L_CONFIRM_MESSAGE'	=> $this->user->lang('EXTENSION_ENABLE_CONFIRM', $md_manager->get_metadata('display-name')),
-					'U_ENABLE'			=> $this->u_action . '&amp;action=enable&amp;ext_name=' . urlencode($ext_name) . '&amp;hash=' . generate_link_hash('enable.' . $ext_name),
-				));
+				if (confirm_box(true))
+				{
+					redirect($this->u_action . '&amp;action=enable&amp;ext_name=' . urlencode($ext_name) . '&amp;hash=' . generate_link_hash('enable.' . $ext_name));
+				}
+				else
+				{
+					confirm_box(false, $this->user->lang('EXTENSION_ENABLE_CONFIRM', $md_manager->get_metadata('display-name')), build_hidden_fields(array(
+						'i'			=> $id,
+						'mode'		=> $mode,
+						'action'	=> 'enable_pre',
+						'ext_name'	=> $ext_name,
+					)));
+				}
 			break;
 
 			case 'enable':
@@ -215,9 +221,8 @@ class acp_extensions
 						// 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)
 						{
-							$this->template->assign_var('S_NEXT_STEP', true);
-
 							meta_refresh(0, $this->u_action . '&amp;action=enable&amp;ext_name=' . urlencode($ext_name) . '&amp;hash=' . generate_link_hash('enable.' . $ext_name));
+							trigger_error('EXTENSION_ENABLE_IN_PROGRESS', E_USER_NOTICE);
 						}
 					}
 
@@ -233,14 +238,22 @@ class acp_extensions
 				}
 				catch (\phpbb\db\migration\exception $e)
 				{
-					$this->template->assign_var('MIGRATOR_ERROR', $e->getLocalisedMessage($this->user));
+					trigger_error($this->user->lang('MIGRATION_EXCEPTION_ERROR', $e->getLocalisedMessage($this->user)), E_USER_WARNING);
 				}
 
-				$this->tpl_name = 'acp_ext_enable';
-
-				$this->template->assign_vars(array(
-					'U_RETURN'		=> $this->u_action . '&amp;action=list',
-				));
+				if ($this->request->is_ajax())
+				{
+					$actions = $this->output_actions('enabled', [
+						'DISABLE'	=> $this->u_action . '&amp;action=disable_pre&amp;ext_name=' . urlencode($ext_name),
+					]);
+
+					$json_response = new \phpbb\json_response;
+					$json_response->send(array(
+						'EXT_ENABLE_SUCCESS'	=> true,
+						'ACTIONS'				=> $actions,
+					));
+				}
+				trigger_error($this->user->lang('EXTENSION_ENABLE_SUCCESS') . adm_back_link($this->u_action), E_USER_NOTICE);
 			break;
 
 			case 'disable_pre':
@@ -249,13 +262,19 @@ class acp_extensions
 					redirect($this->u_action);
 				}
 
-				$this->tpl_name = 'acp_ext_disable';
-
-				$this->template->assign_vars(array(
-					'PRE'				=> true,
-					'L_CONFIRM_MESSAGE'	=> $this->user->lang('EXTENSION_DISABLE_CONFIRM', $md_manager->get_metadata('display-name')),
-					'U_DISABLE'			=> $this->u_action . '&amp;action=disable&amp;ext_name=' . urlencode($ext_name) . '&amp;hash=' . generate_link_hash('disable.' . $ext_name),
-				));
+				if (confirm_box(true))
+				{
+					redirect($this->u_action . '&amp;action=disable&amp;ext_name=' . urlencode($ext_name) . '&amp;hash=' . generate_link_hash('disable.' . $ext_name));
+				}
+				else
+				{
+					confirm_box(false, $this->user->lang('EXTENSION_DISABLE_CONFIRM', $md_manager->get_metadata('display-name')), build_hidden_fields(array(
+						'i'			=> $id,
+						'mode'		=> $mode,
+						'action'	=> 'disable_pre',
+						'ext_name'	=> $ext_name,
+					)));
+				}
 			break;
 
 			case 'disable':
@@ -272,15 +291,25 @@ class acp_extensions
 						$this->template->assign_var('S_NEXT_STEP', true);
 
 						meta_refresh(0, $this->u_action . '&amp;action=disable&amp;ext_name=' . urlencode($ext_name) . '&amp;hash=' . generate_link_hash('disable.' . $ext_name));
+						trigger_error('EXTENSION_DISABLE_IN_PROGRESS', E_USER_NOTICE);
 					}
 				}
 				$this->log->add('admin', $this->user->data['user_id'], $this->user->ip, 'LOG_EXT_DISABLE', time(), array($ext_name));
 
-				$this->tpl_name = 'acp_ext_disable';
-
-				$this->template->assign_vars(array(
-					'U_RETURN'	=> $this->u_action . '&amp;action=list',
-				));
+				if ($this->request->is_ajax())
+				{
+					$actions = $this->output_actions('disabled', [
+						'ENABLE'		=> $this->u_action . '&amp;action=enable_pre&amp;ext_name=' . urlencode($ext_name),
+						'DELETE_DATA'	=> $this->u_action . '&amp;action=delete_data_pre&amp;ext_name=' . urlencode($ext_name),
+					]);
+
+					$json_response = new \phpbb\json_response;
+					$json_response->send(array(
+						'EXT_DISABLE_SUCCESS'	=> true,
+						'ACTIONS'				=> $actions,
+					));
+				}
+				trigger_error($this->user->lang('EXTENSION_DISABLE_SUCCESS') . adm_back_link($this->u_action), E_USER_NOTICE);
 			break;
 
 			case 'delete_data_pre':
@@ -288,13 +317,20 @@ class acp_extensions
 				{
 					redirect($this->u_action);
 				}
-				$this->tpl_name = 'acp_ext_delete_data';
 
-				$this->template->assign_vars(array(
-					'PRE'				=> true,
-					'L_CONFIRM_MESSAGE'	=> $this->user->lang('EXTENSION_DELETE_DATA_CONFIRM', $md_manager->get_metadata('display-name')),
-					'U_PURGE'			=> $this->u_action . '&amp;action=delete_data&amp;ext_name=' . urlencode($ext_name) . '&amp;hash=' . generate_link_hash('delete_data.' . $ext_name),
-				));
+				if (confirm_box(true))
+				{
+					redirect($this->u_action . '&amp;action=delete_data&amp;ext_name=' . urlencode($ext_name) . '&amp;hash=' . generate_link_hash('delete_data.' . $ext_name));
+				}
+				else
+				{
+					confirm_box(false, $this->user->lang('EXTENSION_DELETE_DATA_CONFIRM', $md_manager->get_metadata('display-name')), build_hidden_fields(array(
+						'i'			=> $id,
+						'mode'		=> $mode,
+						'action'	=> 'delete_data_pre',
+						'ext_name'	=> $ext_name,
+					)));
+				}
 			break;
 
 			case 'delete_data':
@@ -313,20 +349,29 @@ class acp_extensions
 							$this->template->assign_var('S_NEXT_STEP', true);
 
 							meta_refresh(0, $this->u_action . '&amp;action=delete_data&amp;ext_name=' . urlencode($ext_name) . '&amp;hash=' . generate_link_hash('delete_data.' . $ext_name));
+							trigger_error('EXTENSION_DELETE_DATA_IN_PROGRESS', E_USER_NOTICE);
 						}
 					}
 					$this->log->add('admin', $this->user->data['user_id'], $this->user->ip, 'LOG_EXT_PURGE', time(), array($ext_name));
 				}
 				catch (\phpbb\db\migration\exception $e)
 				{
-					$this->template->assign_var('MIGRATOR_ERROR', $e->getLocalisedMessage($this->user));
+					trigger_error($this->user->lang('MIGRATION_EXCEPTION_ERROR', $e->getLocalisedMessage($this->user)), E_USER_WARNING);
 				}
 
-				$this->tpl_name = 'acp_ext_delete_data';
-
-				$this->template->assign_vars(array(
-					'U_RETURN'	=> $this->u_action . '&amp;action=list',
-				));
+				if ($this->request->is_ajax())
+				{
+					$actions = $this->output_actions('disabled', [
+						'ENABLE'		=> $this->u_action . '&amp;action=enable_pre&amp;ext_name=' . urlencode($ext_name),
+					]);
+
+					$json_response = new \phpbb\json_response;
+					$json_response->send(array(
+						'EXT_DELETE_DATA_SUCCESS'	=> true,
+						'ACTIONS'					=> $actions,
+					));
+				}
+				trigger_error($this->user->lang('EXTENSION_DELETE_DATA_SUCCESS') . adm_back_link($this->u_action), E_USER_NOTICE);
 			break;
 
 			case 'details':
@@ -605,17 +650,37 @@ class acp_extensions
 	*
 	* @param string $block
 	* @param array $actions
+	* @return array List of actions to be performed on the extension
 	*/
 	private function output_actions($block, $actions)
 	{
-		foreach ($actions as $lang => $url)
+		$vars_ary = array();
+		foreach ($actions as $lang => $options)
 		{
-			$this->template->assign_block_vars($block . '.actions', array(
+			$url = $options;
+			if (is_array($options))
+			{
+				$url = $options['url'];
+			}
+
+			$vars = array(
 				'L_ACTION'			=> $this->user->lang('EXTENSION_' . $lang),
 				'L_ACTION_EXPLAIN'	=> (isset($this->user->lang['EXTENSION_' . $lang . '_EXPLAIN'])) ? $this->user->lang('EXTENSION_' . $lang . '_EXPLAIN') : '',
 				'U_ACTION'			=> $url,
-			));
+				'ACTION_AJAX'		=> 'ext_' . strtolower($lang),
+			);
+
+			if (isset($options['color']))
+			{
+				$vars['COLOR'] = $options['color'];
+			}
+
+			$this->template->assign_block_vars($block . '.actions', $vars);
+
+			$vars_ary[] = $vars;
 		}
+
+		return $vars_ary;
 	}
 
 	/**
diff --git a/phpBB/includes/acp/acp_main.php b/phpBB/includes/acp/acp_main.php
index 8f169d15a7..27fac54777 100644
--- a/phpBB/includes/acp/acp_main.php
+++ b/phpBB/includes/acp/acp_main.php
@@ -657,7 +657,7 @@ class acp_main
 		}
 
 		// Warn if install is still present
-		if (file_exists($phpbb_root_path . 'install') && !is_file($phpbb_root_path . 'install'))
+		if (!defined('IN_INSTALL') && !$phpbb_container->getParameter('allow_install_dir') && file_exists($phpbb_root_path . 'install') && !is_file($phpbb_root_path . 'install'))
 		{
 			$template->assign_var('S_REMOVE_INSTALL', true);
 		}