php-phpbb/phpBB/search.php

<?php
/**
*
* This file is part of the phpBB Forum Software package.
*
* @copyright (c) phpBB Limited <https://www.phpbb.com>
* @license GNU General Public License, version 2 (GPL-2.0)
*
* For full copyright and license information, please see
* the docs/CREDITS.txt file.
*
*/

/**
* @ignore
*/
define('IN_PHPBB', true);
$phpbb_root_path = (defined('PHPBB_ROOT_PATH')) ? PHPBB_ROOT_PATH : './';
$phpEx = substr(strrchr(__FILE__, '.'), 1);
include($phpbb_root_path . 'common.' . $phpEx);

// Start session management
$user->session_begin();
$auth->acl($user->data);
$user->setup('search');

// Define initial vars
$mode			= $request->variable('mode', '');
$search_id		= $request->variable('search_id', '');
$start			= max($request->variable('start', 0), 0);
$post_id		= $request->variable('p', 0);
$topic_id		= $request->variable('t', 0);
$view			= $request->variable('view', '');

$submit			= $request->variable('submit', false);
$keywords		= $request->variable('keywords', '', true);
$add_keywords	= $request->variable('add_keywords', '', true);
$author			= $request->variable('author', '', true);
$author_id		= $request->variable('author_id', 0);
$show_results	= ($topic_id) ? 'posts' : $request->variable('sr', 'posts');
$show_results	= ($show_results == 'posts') ? 'posts' : 'topics';
$search_terms	= $request->variable('terms', 'all');
$search_fields	= $request->variable('sf', 'all');
$search_child	= $request->variable('sc', true);

$sort_days		= $request->variable('st', 0);
$sort_key		= $request->variable('sk', 't');
$sort_dir		= $request->variable('sd', 'd');

$return_chars	= $request->variable('ch', ($topic_id) ? -1 : 300);
$search_forum	= $request->variable('fid', array(0));

// We put login boxes for the case if search_id is newposts, egosearch or unreadposts
// because a guest should be able to log in even if guests search is not permitted

switch ($search_id)
{
	// Egosearch is an author search
	case 'egosearch':
		$author_id = $user->data['user_id'];
		if ($user->data['user_id'] == ANONYMOUS)
		{
			login_box('', $user->lang['LOGIN_EXPLAIN_EGOSEARCH']);
		}
	break;

	// Search for unread posts needs to be allowed and user to be logged in if topics tracking for guests is disabled
	case 'unreadposts':
		if (!$config['load_unreads_search'])
		{
			$template->assign_var('S_NO_SEARCH', true);
			trigger_error('NO_SEARCH_UNREADS');
		}
		else if (!$config['load_anon_lastread'] && !$user->data['is_registered'])
		{
			login_box('', $user->lang['LOGIN_EXPLAIN_UNREADSEARCH']);
		}
	break;

	// The "new posts" search uses user_lastvisit which is user based, so it should require user to log in.
	case 'newposts':
		if ($user->data['user_id'] == ANONYMOUS)
		{
			login_box('', $user->lang['LOGIN_EXPLAIN_NEWPOSTS']);
		}
	break;

	default:
		// There's nothing to do here for now ;)
	break;
}

// Is user able to search? Has search been disabled?
if (!$auth->acl_get('u_search') || !$auth->acl_getf_global('f_search') || !$config['load_search'])
{
	$template->assign_var('S_NO_SEARCH', true);
	trigger_error('NO_SEARCH');
}

// Check search load limit
if ($user->load && $config['limit_search_load'] && ($user->load > doubleval($config['limit_search_load'])))
{
	$template->assign_var('S_NO_SEARCH', true);
	trigger_error('NO_SEARCH_LOAD');
}

// It is applicable if the configuration setting is non-zero, and the user cannot
// ignore the flood setting, and the search is a keyword search.
$interval = ($user->data['user_id'] == ANONYMOUS) ? $config['search_anonymous_interval'] : $config['search_interval'];
if ($interval && !in_array($search_id, array('unreadposts', 'unanswered', 'active_topics', 'egosearch')) && !$auth->acl_get('u_ignoreflood'))
{
	if ($user->data['user_last_search'] > time() - $interval)
	{
		$template->assign_var('S_NO_SEARCH', true);
		trigger_error($user->lang('NO_SEARCH_TIME', (int) ($user->data['user_last_search'] + $interval - time())));
	}
}

// Define some vars
$limit_days		= array(0 => $user->lang['ALL_RESULTS'], 1 => $user->lang['1_DAY'], 7 => $user->lang['7_DAYS'], 14 => $user->lang['2_WEEKS'], 30 => $user->lang['1_MONTH'], 90 => $user->lang['3_MONTHS'], 180 => $user->lang['6_MONTHS'], 365 => $user->lang['1_YEAR']);
$sort_by_text	= array('a' => $user->lang['SORT_AUTHOR'], 't' => $user->lang['SORT_TIME'], 'f' => $user->lang['SORT_FORUM'], 'i' => $user->lang['SORT_TOPIC_TITLE'], 's' => $user->lang['SORT_POST_SUBJECT']);

$s_limit_days = $s_sort_key = $s_sort_dir = $u_sort_param = '';
gen_sort_selects($limit_days, $sort_by_text, $sort_days, $sort_key, $sort_dir, $s_limit_days, $s_sort_key, $s_sort_dir, $u_sort_param);

/* @var $phpbb_content_visibility \phpbb\content_visibility */
$phpbb_content_visibility = $phpbb_container->get('content.visibility');

/* @var $pagination \phpbb\pagination */
$pagination = $phpbb_container->get('pagination');

/**
* This event allows you to alter the above parameters, such as keywords and submit
*
* @event core.search_modify_submit_parameters
* @var	string	keywords	The search keywords
* @var	string	author		Specifies the author match, when ANONYMOUS is also a search-match
* @var	int		author_id	ID of the author to search by
* @var	string	search_id	Predefined search type name
* @var	bool	submit		Whether or not the form has been submitted
* @since 3.1.10-RC1
*/
$vars = array(
	'keywords',
	'author',
	'author_id',
	'search_id',
	'submit',
);
extract($phpbb_dispatcher->trigger_event('core.search_modify_submit_parameters', compact($vars)));

if ($keywords || $author || $author_id || $search_id || $submit)
{
	// clear arrays
	$id_ary = array();

	// If we are looking for authors get their ids
	$author_id_ary = array();
	$sql_author_match = '';
	if ($author_id)
	{
		$author_id_ary[] = $author_id;
	}
	else if ($author)
	{
		if ((strpos($author, '*') !== false) && (utf8_strlen(str_replace(array('*', '%'), '', $author)) < $config['min_search_author_chars']))
		{
			trigger_error($user->lang('TOO_FEW_AUTHOR_CHARS', (int) $config['min_search_author_chars']));
		}

		$sql_where = (strpos($author, '*') !== false) ? ' username_clean ' . $db->sql_like_expression(str_replace('*', $db->get_any_char(), utf8_clean_string($author))) : " username_clean = '" . $db->sql_escape(utf8_clean_string($author)) . "'";

		$sql = 'SELECT user_id
			FROM ' . USERS_TABLE . "
			WHERE $sql_where
				AND user_type <> " . USER_IGNORE;
		$result = $db->sql_query_limit($sql, 100);

		while ($row = $db->sql_fetchrow($result))
		{
			$author_id_ary[] = (int) $row['user_id'];
		}
		$db->sql_freeresult($result);

		$sql_where = (strpos($author, '*') !== false) ? ' post_username ' . $db->sql_like_expression(str_replace('*', $db->get_any_char(), utf8_clean_string($author))) : " post_username = '" . $db->sql_escape(utf8_clean_string($author)) . "'";

		$sql = 'SELECT 1 as guest_post
			FROM ' . POSTS_TABLE . "
			WHERE $sql_where
				AND poster_id = " . ANONYMOUS;
		$result = $db->sql_query_limit($sql, 1);
		$found_guest_post = $db->sql_fetchfield('guest_post');
		$db->sql_freeresult($result);

		if ($found_guest_post)
		{
			$author_id_ary[] = ANONYMOUS;
			$sql_author_match = (strpos($author, '*') !== false) ? ' ' . $db->sql_like_expression(str_replace('*', $db->get_any_char(), utf8_clean_string($author))) : " = '" . $db->sql_escape(utf8_clean_string($author)) . "'";
		}

		if (!count($author_id_ary))
		{
			trigger_error('NO_SEARCH_RESULTS');
		}
	}

	// if we search in an existing search result just add the additional keywords. But we need to use "all search terms"-mode
	// so we can keep the old keywords in their old mode, but add the new ones as required words
	if ($add_keywords)
	{
		if ($search_terms == 'all')
		{
			$keywords .= ' ' . $add_keywords;
		}
		else
		{
			$search_terms = 'all';
			$keywords = implode(' |', explode(' ', preg_replace('#\s+#u', ' ', $keywords))) . ' ' .$add_keywords;
		}
	}

	// Which forums should not be searched? Author searches are also carried out in unindexed forums
	if (empty($keywords) && count($author_id_ary))
	{
		$ex_fid_ary = array_keys($auth->acl_getf('!f_read', true));
	}
	else
	{
		$ex_fid_ary = array_unique(array_merge(array_keys($auth->acl_getf('!f_read', true)), array_keys($auth->acl_getf('!f_search', true))));
	}

	$not_in_fid = (count($ex_fid_ary)) ? 'WHERE ' . $db->sql_in_set('f.forum_id', $ex_fid_ary, true) . " OR (f.forum_password <> '' AND fa.user_id <> " . (int) $user->data['user_id'] . ')' : "";

	$sql = 'SELECT f.forum_id, f.forum_name, f.parent_id, f.forum_type, f.right_id, f.forum_password, f.forum_flags, fa.user_id
		FROM ' . FORUMS_TABLE . ' f
		LEFT JOIN ' . FORUMS_ACCESS_TABLE . " fa ON (fa.forum_id = f.forum_id
			AND fa.session_id = '" . $db->sql_escape($user->session_id) . "')
		$not_in_fid
		ORDER BY f.left_id";
	$result = $db->sql_query($sql);

	$right_id = 0;
	$reset_search_forum = true;
	while ($row = $db->sql_fetchrow($result))
	{
		if ($row['forum_password'] && $row['user_id'] != $user->data['user_id'])
		{
			$ex_fid_ary[] = (int) $row['forum_id'];
			continue;
		}

		// Exclude forums from active topics
		if (!($row['forum_flags'] & FORUM_FLAG_ACTIVE_TOPICS) && ($search_id == 'active_topics'))
		{
			$ex_fid_ary[] = (int) $row['forum_id'];
			continue;
		}

		if (count($search_forum))
		{
			if ($search_child)
			{
				if (in_array($row['forum_id'], $search_forum) && $row['right_id'] > $right_id)
				{
					$right_id = (int) $row['right_id'];
				}
				else if ($row['right_id'] < $right_id)
				{
					continue;
				}
			}

			if (!in_array($row['forum_id'], $search_forum))
			{
				$ex_fid_ary[] = (int) $row['forum_id'];
				$reset_search_forum = false;
			}
		}
	}
	$db->sql_freeresult($result);

	// find out in which forums the user is allowed to view posts
	$m_approve_posts_fid_sql = $phpbb_content_visibility->get_global_visibility_sql('post', $ex_fid_ary, 'p.');
	$m_approve_topics_fid_sql = $phpbb_content_visibility->get_global_visibility_sql('topic', $ex_fid_ary, 't.');

	if ($reset_search_forum)
	{
		$search_forum = array();
	}

	// Select which method we'll use to obtain the post_id or topic_id information
	$search_type = $config['search_type'];

	if (!class_exists($search_type))
	{
		trigger_error('NO_SUCH_SEARCH_MODULE');
	}
	// We do some additional checks in the module to ensure it can actually be utilised
	$error = false;
	$search = new $search_type($error, $phpbb_root_path, $phpEx, $auth, $config, $db, $user, $phpbb_dispatcher);

	if ($error)
	{
		trigger_error($error);
	}

	// let the search module split up the keywords
	if ($keywords)
	{
		$correct_query = $search->split_keywords($keywords, $search_terms);
		$common_words = $search->get_common_words();
		if (!$correct_query || (!$search->get_search_query() && !count($author_id_ary) && !$search_id))
		{
			$ignored = (count($common_words)) ? sprintf($user->lang['IGNORED_TERMS_EXPLAIN'], implode(' ', $common_words)) . '<br />' : '';
			$word_length = $search->get_word_length();
			if ($word_length)
			{
				trigger_error($ignored . $user->lang('NO_KEYWORDS', $user->lang('CHARACTERS', (int) $word_length['min']), $user->lang('CHARACTERS', (int) $word_length['max'])));
			}
			else
			{
				trigger_error($ignored);
			}
		}
	}

	if (!$keywords && count($author_id_ary))
	{
		// if it is an author search we want to show topics by default
		$show_results = ($topic_id) ? 'posts' : $request->variable('sr', ($search_id == 'egosearch') ? 'topics' : 'posts');
		$show_results = ($show_results == 'posts') ? 'posts' : 'topics';
	}

	// define some variables needed for retrieving post_id/topic_id information
	$sort_by_sql = array('a' => 'u.username_clean', 't' => (($show_results == 'posts') ? 'p.post_time' : 't.topic_last_post_time'), 'f' => 'f.forum_id', 'i' => 't.topic_title', 's' => (($show_results == 'posts') ? 'p.post_subject' : 't.topic_title'));

	/**
	* Event to modify the SQL parameters before pre-made searches
	*
	* @event core.search_modify_param_before
	* @var	string	keywords		String of the specified keywords
	* @var	array	sort_by_sql		Array of SQL sorting instructions
	* @var	array	ex_fid_ary		Array of excluded forum ids
	* @var	array	author_id_ary	Array of exclusive author ids
	* @var	string	search_id		The id of the search request
	* @var	array	id_ary			Array of post or topic ids for search result
	* @var	string	show_results	'posts' or 'topics' type of ids
	* @since 3.1.3-RC1
	* @changed 3.1.10-RC1 Added id_ary, show_results
	*/
	$vars = array(
		'keywords',
		'sort_by_sql',
		'ex_fid_ary',
		'author_id_ary',
		'search_id',
		'id_ary',
		'show_results',
	);
	extract($phpbb_dispatcher->trigger_event('core.search_modify_param_before', compact($vars)));

	// pre-made searches
	$sql = $field = $l_search_title = '';
	if ($search_id)
	{
		switch ($search_id)
		{
			// Oh holy Bob, bring us some activity...
			case 'active_topics':
				$l_search_title = $user->lang['SEARCH_ACTIVE_TOPICS'];
				$show_results = 'topics';
				$sort_key = 't';
				$sort_dir = 'd';
				$sort_days = $request->variable('st', 7);
				$sort_by_sql['t'] = 't.topic_last_post_time';

				gen_sort_selects($limit_days, $sort_by_text, $sort_days, $sort_key, $sort_dir, $s_limit_days, $s_sort_key, $s_sort_dir, $u_sort_param);
				$s_sort_key = $s_sort_dir = '';

				$last_post_time_sql = ($sort_days) ? ' AND t.topic_last_post_time > ' . (time() - ($sort_days * 24 * 3600)) : '';

				$sql = 'SELECT t.topic_last_post_time, t.topic_id
					FROM ' . TOPICS_TABLE . " t
					WHERE t.topic_moved_id = 0
						$last_post_time_sql
						AND " . $m_approve_topics_fid_sql . '
						' . ((count($ex_fid_ary)) ? ' AND ' . $db->sql_in_set('t.forum_id', $ex_fid_ary, true) : '') . '
					ORDER BY t.topic_last_post_time DESC';
				$field = 'topic_id';
			break;

			case 'unanswered':
				$l_search_title = $user->lang['SEARCH_UNANSWERED'];
				$show_results = $request->variable('sr', 'topics');
				$show_results = ($show_results == 'posts') ? 'posts' : 'topics';
				$sort_by_sql['t'] = ($show_results == 'posts') ? 'p.post_time' : 't.topic_last_post_time';
				$sort_by_sql['s'] = ($show_results == 'posts') ? 'p.post_subject' : 't.topic_title';
				$sql_sort = 'ORDER BY ' . $sort_by_sql[$sort_key] . (($sort_dir == 'a') ? ' ASC' : ' DESC');

				$sort_join = ($sort_key == 'f') ? FORUMS_TABLE . ' f, ' : '';
				$sql_sort = ($sort_key == 'f') ? ' AND f.forum_id = p.forum_id ' . $sql_sort : $sql_sort;

				if ($sort_days)
				{
					$last_post_time = 'AND p.post_time > ' . (time() - ($sort_days * 24 * 3600));
				}
				else
				{
					$last_post_time = '';
				}

				if ($sort_key == 'a')
				{
					$sort_join = USERS_TABLE . ' u, ';
					$sql_sort = ' AND u.user_id = p.poster_id ' . $sql_sort;
				}
				if ($show_results == 'posts')
				{
					$sql = "SELECT p.post_id
						FROM $sort_join" . POSTS_TABLE . ' p, ' . TOPICS_TABLE . " t
						WHERE t.topic_posts_approved = 1
							AND p.topic_id = t.topic_id
							$last_post_time
							AND $m_approve_posts_fid_sql
							" . ((count($ex_fid_ary)) ? ' AND ' . $db->sql_in_set('p.forum_id', $ex_fid_ary, true) : '') . "
							$sql_sort";
					$field = 'post_id';
				}
				else
				{
					$sql = 'SELECT DISTINCT ' . $sort_by_sql[$sort_key] . ", p.topic_id
						FROM $sort_join" . POSTS_TABLE . ' p, ' . TOPICS_TABLE . " t
						WHERE t.topic_posts_approved = 1
							AND t.topic_moved_id = 0
							AND p.topic_id = t.topic_id
							$last_post_time
							AND $m_approve_topics_fid_sql
							" . ((count($ex_fid_ary)) ? ' AND ' . $db->sql_in_set('p.forum_id', $ex_fid_ary, true) : '') . "
						$sql_sort";
					$field = 'topic_id';
				}
			break;

			case 'unreadposts':
				$l_search_title = $user->lang['SEARCH_UNREAD'];
				// force sorting
				$show_results = 'topics';
				$sort_key = 't';
				$sort_by_sql['t'] = 't.topic_last_post_time';
				$sql_sort = 'ORDER BY ' . $sort_by_sql[$sort_key] . (($sort_dir == 'a') ? ' ASC' : ' DESC');

				$sql_where = 'AND t.topic_moved_id = 0
					AND ' . $m_approve_topics_fid_sql . '
					' . ((count($ex_fid_ary)) ? 'AND ' . $db->sql_in_set('t.forum_id', $ex_fid_ary, true) : '');

				gen_sort_selects($limit_days, $sort_by_text, $sort_days, $sort_key, $sort_dir, $s_limit_days, $s_sort_key, $s_sort_dir, $u_sort_param);
				$s_sort_key = $s_sort_dir = $u_sort_param = $s_limit_days = '';

				$template->assign_var('U_MARK_ALL_READ', ($user->data['is_registered'] || $config['load_anon_lastread']) ? append_sid("{$phpbb_root_path}index.$phpEx", 'hash=' . generate_link_hash('global') . '&amp;mark=forums&amp;mark_time=' . time()) : '');
			break;

			case 'newposts':
				$l_search_title = $user->lang['SEARCH_NEW'];
				// force sorting
				$show_results = ($request->variable('sr', 'topics') == 'posts') ? 'posts' : 'topics';
				$sort_key = 't';
				$sort_dir = 'd';
				$sort_by_sql['t'] = ($show_results == 'posts') ? 'p.post_time' : 't.topic_last_post_time';
				$sql_sort = 'ORDER BY ' . $sort_by_sql[$sort_key] . (($sort_dir == 'a') ? ' ASC' : ' DESC');

				gen_sort_selects($limit_days, $sort_by_text, $sort_days, $sort_key, $sort_dir, $s_limit_days, $s_sort_key, $s_sort_dir, $u_sort_param);
				$s_sort_key = $s_sort_dir = $u_sort_param = $s_limit_days = '';

				if ($show_results == 'posts')
				{
					$sql = 'SELECT p.post_id
						FROM ' . POSTS_TABLE . ' p
						WHERE p.post_time > ' . $user->data['user_lastvisit'] . '
							AND ' . $m_approve_posts_fid_sql . '
							' . ((count($ex_fid_ary)) ? ' AND ' . $db->sql_in_set('p.forum_id', $ex_fid_ary, true) : '') . "
						$sql_sort";
					$field = 'post_id';
				}
				else
				{
					$sql = 'SELECT t.topic_id
						FROM ' . TOPICS_TABLE . ' t
						WHERE t.topic_last_post_time > ' . $user->data['user_lastvisit'] . '
							AND t.topic_moved_id = 0
							AND ' . $m_approve_topics_fid_sql . '
							' . ((count($ex_fid_ary)) ? 'AND ' . $db->sql_in_set('t.forum_id', $ex_fid_ary, true) : '') . "
						$sql_sort";
/*
		[Fix] queued replies missing from "view new posts" (Bug #42705 - Patch by Paul)
		- Creates temporary table, query is far from optimized

					$sql = 'SELECT t.topic_id
						FROM ' . TOPICS_TABLE . ' t, ' . POSTS_TABLE . ' p
						WHERE p.post_time > ' . $user->data['user_lastvisit'] . '
							AND t.topic_id = p.topic_id
							AND t.topic_moved_id = 0
							AND ' . $m_approve_topics_fid_sql . "
						GROUP BY t.topic_id
						$sql_sort";
*/
					$field = 'topic_id';
				}
			break;

			case 'egosearch':
				$l_search_title = $user->lang['SEARCH_SELF'];
			break;
		}
	}

	/**
	* Event to modify data after pre-made searches
	*
	* @event core.search_modify_param_after
	* @var	string	l_search_title	The title of the search page
	* @var	string	search_id		Predefined search type name
	* @var	string	show_results	Display topics or posts
	* @var	string	sql				SQL query corresponding to the pre-made search id
	* @since 3.1.7-RC1
	*/
	$vars = array(
		'l_search_title',
		'search_id',
		'show_results',
		'sql',
	);
	extract($phpbb_dispatcher->trigger_event('core.search_modify_param_after', compact($vars)));

	// show_results should not change after this
	$per_page = ($show_results == 'posts') ? $config['posts_per_page'] : $config['topics_per_page'];
	$total_match_count = 0;

	// Set limit for the $total_match_count to reduce server load
	$total_matches_limit = 1000;
	$found_more_search_matches = false;

	if ($search_id)
	{
		if ($sql)
		{
			// Only return up to $total_matches_limit+1 ids (the last one will be removed later)
			$result = $db->sql_query_limit($sql, $total_matches_limit + 1);

			while ($row = $db->sql_fetchrow($result))
			{
				$id_ary[] = (int) $row[$field];
			}
			$db->sql_freeresult($result);
		}
		else if ($search_id == 'unreadposts')
		{
			// Only return up to $total_matches_limit+1 ids (the last one will be removed later)
			$id_ary = array_keys(get_unread_topics($user->data['user_id'], $sql_where, $sql_sort, $total_matches_limit + 1));
		}
		else
		{
			$search_id = '';
		}

		$total_match_count = count($id_ary);
		if ($total_match_count)
		{
			// Limit the number to $total_matches_limit for pre-made searches
			if ($total_match_count > $total_matches_limit)
			{
				$found_more_search_matches = true;
				$total_match_count = $total_matches_limit;
			}

			// Make sure $start is set to the last page if it exceeds the amount
			$start = $pagination->validate_start($start, $per_page, $total_match_count);

			$id_ary = array_slice($id_ary, $start, $per_page);
		}
		else
		{
			// Set $start to 0 if no matches were found
			$start = 0;
		}
	}

	// make sure that some arrays are always in the same order
	sort($ex_fid_ary);
	sort($author_id_ary);

	if ($search->get_search_query())
	{
		$total_match_count = $search->keyword_search($show_results, $search_fields, $search_terms, $sort_by_sql, $sort_key, $sort_dir, $sort_days, $ex_fid_ary, $m_approve_posts_fid_sql, $topic_id, $author_id_ary, $sql_author_match, $id_ary, $start, $per_page);
	}
	else if (count($author_id_ary))
	{
		$firstpost_only = ($search_fields === 'firstpost' || $search_fields == 'titleonly') ? true : false;
		$total_match_count = $search->author_search($show_results, $firstpost_only, $sort_by_sql, $sort_key, $sort_dir, $sort_days, $ex_fid_ary, $m_approve_posts_fid_sql, $topic_id, $author_id_ary, $sql_author_match, $id_ary, $start, $per_page);
	}

	/**
	* Event to search otherwise than by keywords or author
	*
	* @event core.search_backend_search_after
	* @var	string		show_results				'posts' or 'topics' type of ids
	* @var	string		search_fields				The data fields to search in
	* @var	string		search_terms				Is either 'all' (use query as entered, words without prefix should default to "have to be in field") or 'any' (ignore search query parts and just return all posts that contain any of the specified words)
	* @var	array		sort_by_sql					Array of SQL sorting instructions
	* @var	string		sort_key					The sort key
	* @var	string		sort_dir					The sort direction
	* @var	int			sort_days					Limit the age of results
	* @var	array		ex_fid_ary					Array of excluded forum ids
	* @var	string		m_approve_posts_fid_sql		Specifies which types of posts the user can view in which forums
	* @var	int			topic_id					is set to 0 or a topic id, if it is not 0 then only posts in this topic should be searched
	* @var	array		author_id_ary				Array of exclusive author ids
	* @var	string		sql_author_match			Specifies the author match, when ANONYMOUS is also a search-match
	* @var	array		id_ary						Array of post or topic ids for search result
	* @var	int			start						The starting id of the results
	* @var	int			per_page					Number of ids each page is supposed to contain
	* @var	int			total_match_count			The total number of search matches
	* @since 3.1.10-RC1
	*/
	$vars = array(
		'show_results',
		'search_fields',
		'search_terms',
		'sort_by_sql',
		'sort_key',
		'sort_dir',
		'sort_days',
		'ex_fid_ary',
		'm_approve_posts_fid_sql',
		'topic_id',
		'author_id_ary',
		'sql_author_match',
		'id_ary',
		'start',
		'per_page',
		'total_match_count',
	);
	extract($phpbb_dispatcher->trigger_event('core.search_backend_search_after', compact($vars)));

	$sql_where = '';

	if (count($id_ary))
	{
		$sql_where .= $db->sql_in_set(($show_results == 'posts') ? 'p.post_id' : 't.topic_id', $id_ary);
		$sql_where .= (count($ex_fid_ary)) ? ' AND (' . $db->sql_in_set('f.forum_id', $ex_fid_ary, true) . ' OR f.forum_id IS NULL)' : '';
		$sql_where .= ' AND ' . (($show_results == 'posts') ? $m_approve_posts_fid_sql : $m_approve_topics_fid_sql);
	}

	if ($show_results == 'posts')
	{
		include($phpbb_root_path . 'includes/functions_posting.' . $phpEx);
	}
	else
	{
		include($phpbb_root_path . 'includes/functions_display.' . $phpEx);
	}

	$user->add_lang('viewtopic');

	// Grab icons
	$icons = $cache->obtain_icons();

	// define some vars for urls
	// A single wildcard will make the search results look ugly
	$hilit = phpbb_clean_search_string(str_replace(array('+', '-', '|', '(', ')', '&quot;'), ' ', $keywords));
	$hilit = str_replace(' ', '|', $hilit);

	$u_hilit = urlencode(htmlspecialchars_decode(str_replace('|', ' ', $hilit)));
	$u_show_results = '&amp;sr=' . $show_results;
	$u_search_forum = implode('&amp;fid%5B%5D=', $search_forum);

	$u_search = append_sid("{$phpbb_root_path}search.$phpEx", $u_sort_param . $u_show_results);
	$u_search .= ($search_id) ? '&amp;search_id=' . $search_id : '';
	$u_search .= ($u_hilit) ? '&amp;keywords=' . urlencode(htmlspecialchars_decode($keywords)) : '';
	$u_search .= ($search_terms != 'all') ? '&amp;terms=' . $search_terms : '';
	$u_search .= ($topic_id) ? '&amp;t=' . $topic_id : '';
	$u_search .= ($author) ? '&amp;author=' . urlencode(htmlspecialchars_decode($author)) : '';
	$u_search .= ($author_id) ? '&amp;author_id=' . $author_id : '';
	$u_search .= ($u_search_forum) ? '&amp;fid%5B%5D=' . $u_search_forum : '';
	$u_search .= (!$search_child) ? '&amp;sc=0' : '';
	$u_search .= ($search_fields != 'all') ? '&amp;sf=' . $search_fields : '';
	$u_search .= ($return_chars != 300) ? '&amp;ch=' . $return_chars : '';

	/**
	* Event to add or modify search URL parameters
	*
	* @event core.search_modify_url_parameters
	* @var	string	u_search		Search URL parameters string
	* @var	string	search_id		Predefined search type name
	* @var	string	show_results	String indicating the show results mode
	* @var	string	sql_where		The SQL WHERE string used by search to get topic data
	* @var	int		total_match_count	The total number of search matches
	* @var	array	ex_fid_ary		Array of excluded forum ids
	* @since 3.1.7-RC1
	* @changed 3.1.10-RC1 Added show_results, sql_where, total_match_count
	* @changed 3.1.11-RC1 Added ex_fid_ary
	*/
	$vars = array(
		'u_search',
		'search_id',
		'show_results',
		'sql_where',
		'total_match_count',
		'ex_fid_ary',
	);
	extract($phpbb_dispatcher->trigger_event('core.search_modify_url_parameters', compact($vars)));

	if ($sql_where)
	{
		if ($show_results == 'posts')
		{
			// @todo Joining this query to the one below?
			$sql = 'SELECT zebra_id, friend, foe
				FROM ' . ZEBRA_TABLE . '
				WHERE user_id = ' . $user->data['user_id'];
			$result = $db->sql_query($sql);

			$zebra = array();
			while ($row = $db->sql_fetchrow($result))
			{
				$zebra[($row['friend']) ? 'friend' : 'foe'][] = $row['zebra_id'];
			}
			$db->sql_freeresult($result);

			$sql_array = array(
				'SELECT'	=> 'p.*, f.forum_id, f.forum_name, t.*, u.username, u.username_clean, u.user_sig, u.user_sig_bbcode_uid, u.user_colour',
				'FROM'		=> array(
					POSTS_TABLE		=> 'p',
				),
				'LEFT_JOIN' => array(
					array(
						'FROM'	=> array(TOPICS_TABLE => 't'),
						'ON'	=> 'p.topic_id = t.topic_id',
					),
					array(
						'FROM'	=> array(FORUMS_TABLE => 'f'),
						'ON'	=> 'p.forum_id = f.forum_id',
					),
					array(
						'FROM'	=> array(USERS_TABLE => 'u'),
						'ON'	=> 'p.poster_id = u.user_id',
					),
				),
				'WHERE'	=> $sql_where,
				'ORDER_BY' => $sort_by_sql[$sort_key] . ' ' . (($sort_dir == 'd') ? 'DESC' : 'ASC'),
			);

			/**
			* Event to modify the SQL query before the posts data is retrieved
			*
			* @event core.search_get_posts_data
			* @var	array	sql_array		The SQL array
			* @var	array	zebra			Array of zebra data for the current user
			* @var	int		total_match_count	The total number of search matches
			* @var	string	keywords		String of the specified keywords
			* @var	array	sort_by_sql		Array of SQL sorting instructions
			* @var	string	s_sort_dir		The sort direction
			* @var	string	s_sort_key		The sort key
			* @var	string	s_limit_days	Limit the age of results
			* @var	array	ex_fid_ary		Array of excluded forum ids
			* @var	array	author_id_ary	Array of exclusive author ids
			* @var	string	search_fields	The data fields to search in
			* @var	int		search_id		The id of the search request
			* @var	int		start			The starting id of the results
			* @since 3.1.0-b3
			*/
			$vars = array(
				'sql_array',
				'zebra',
				'total_match_count',
				'keywords',
				'sort_by_sql',
				's_sort_dir',
				's_sort_key',
				's_limit_days',
				'ex_fid_ary',
				'author_id_ary',
				'search_fields',
				'search_id',
				'start',
			);
			extract($phpbb_dispatcher->trigger_event('core.search_get_posts_data', compact($vars)));

			$sql = $db->sql_build_query('SELECT', $sql_array);
		}
		else
		{
			$sql_from = TOPICS_TABLE . ' t
				LEFT JOIN ' . FORUMS_TABLE . ' f ON (f.forum_id = t.forum_id)
				' . (($sort_key == 'a') ? ' LEFT JOIN ' . USERS_TABLE . ' u ON (u.user_id = t.topic_poster) ' : '');
			$sql_select = 't.*, f.forum_id, f.forum_name';

			if ($user->data['is_registered'])
			{
				if ($config['load_db_track'] && $author_id !== $user->data['user_id'])
				{
					$sql_from .= ' LEFT JOIN ' . TOPICS_POSTED_TABLE . ' tp ON (tp.user_id = ' . $user->data['user_id'] . '
						AND t.topic_id = tp.topic_id)';
					$sql_select .= ', tp.topic_posted';
				}

				if ($config['load_db_lastread'])
				{
					$sql_from .= ' LEFT JOIN ' . TOPICS_TRACK_TABLE . ' tt ON (tt.user_id = ' . $user->data['user_id'] . '
							AND t.topic_id = tt.topic_id)
						LEFT JOIN ' . FORUMS_TRACK_TABLE . ' ft ON (ft.user_id = ' . $user->data['user_id'] . '
							AND ft.forum_id = f.forum_id)';
					$sql_select .= ', tt.mark_time, ft.mark_time as f_mark_time';
				}
			}

			if ($config['load_anon_lastread'] || ($user->data['is_registered'] && !$config['load_db_lastread']))
			{
				$tracking_topics = $request->variable($config['cookie_name'] . '_track', '', true, \phpbb\request\request_interface::COOKIE);
				$tracking_topics = ($tracking_topics) ? tracking_unserialize($tracking_topics) : array();
			}

			$sql_order_by = $sort_by_sql[$sort_key] . ' ' . (($sort_dir == 'd') ? 'DESC' : 'ASC');

			/**
			* Event to modify the SQL query before the topic data is retrieved
			*
			* @event core.search_get_topic_data
			* @var	string	sql_select		The SQL SELECT string used by search to get topic data
			* @var	string	sql_from		The SQL FROM string used by search to get topic data
			* @var	string	sql_where		The SQL WHERE string used by search to get topic data
			* @var	int		total_match_count	The total number of search matches
			* @var	array	sort_by_sql		Array of SQL sorting instructions
			* @var	string	sort_dir		The sorting direction
			* @var	string	sort_key		The sorting key
			* @var	string	sql_order_by	The SQL ORDER BY string used by search to get topic data
			* @since 3.1.0-a1
			* @changed 3.1.0-RC5 Added total_match_count
			* @changed 3.1.7-RC1 Added sort_by_sql, sort_dir, sort_key, sql_order_by
			*/
			$vars = array(
				'sql_select',
				'sql_from',
				'sql_where',
				'total_match_count',
				'sort_by_sql',
				'sort_dir',
				'sort_key',
				'sql_order_by',
			);
			extract($phpbb_dispatcher->trigger_event('core.search_get_topic_data', compact($vars)));

			$sql = "SELECT $sql_select
				FROM $sql_from
				WHERE $sql_where
				ORDER BY $sql_order_by";
		}
		$result = $db->sql_query($sql);
		$result_topic_id = 0;

		$rowset = $attachments = $topic_tracking_info = array();

		if ($show_results == 'topics')
		{
			$forums = $rowset = $shadow_topic_list = array();
			while ($row = $db->sql_fetchrow($result))
			{
				$row['forum_id'] = (int) $row['forum_id'];
				$row['topic_id'] = (int) $row['topic_id'];

				if ($row['topic_status'] == ITEM_MOVED)
				{
					$shadow_topic_list[$row['topic_moved_id']] = $row['topic_id'];
				}

				$rowset[$row['topic_id']] = $row;

				if (!isset($forums[$row['forum_id']]) && $user->data['is_registered'] && $config['load_db_lastread'])
				{
					$forums[$row['forum_id']]['mark_time'] = $row['f_mark_time'];
				}
				$forums[$row['forum_id']]['topic_list'][] = $row['topic_id'];
				$forums[$row['forum_id']]['rowset'][$row['topic_id']] = &$rowset[$row['topic_id']];
			}
			$db->sql_freeresult($result);

			// If we have some shadow topics, update the rowset to reflect their topic information
			if (count($shadow_topic_list))
			{
				$sql = 'SELECT *
					FROM ' . TOPICS_TABLE . '
					WHERE ' . $db->sql_in_set('topic_id', array_keys($shadow_topic_list));
				$result = $db->sql_query($sql);

				while ($row = $db->sql_fetchrow($result))
				{
					$orig_topic_id = $shadow_topic_list[$row['topic_id']];

					// We want to retain some values
					$row = array_merge($row, array(
						'topic_moved_id'	=> $rowset[$orig_topic_id]['topic_moved_id'],
						'topic_status'		=> $rowset[$orig_topic_id]['topic_status'],
						'forum_name'		=> $rowset[$orig_topic_id]['forum_name'])
					);

					$rowset[$orig_topic_id] = $row;
				}
				$db->sql_freeresult($result);
			}
			unset($shadow_topic_list);

			foreach ($forums as $forum_id => $forum)
			{
				if ($user->data['is_registered'] && $config['load_db_lastread'])
				{
					$topic_tracking_info[$forum_id] = get_topic_tracking($forum_id, $forum['topic_list'], $forum['rowset'], array($forum_id => $forum['mark_time']));
				}
				else if ($config['load_anon_lastread'] || $user->data['is_registered'])
				{
					$topic_tracking_info[$forum_id] = get_complete_topic_tracking($forum_id, $forum['topic_list']);

					if (!$user->data['is_registered'])
					{
						$user->data['user_lastmark'] = (isset($tracking_topics['l'])) ? (int) (base_convert($tracking_topics['l'], 36, 10) + $config['board_startdate']) : 0;
					}
				}
			}
			unset($forums);
		}
		else
		{
			$text_only_message = '';
			$attach_list = array();

			while ($row = $db->sql_fetchrow($result))
			{
				/**
				* Modify the row of a post result before the post_text is trimmed
				*
				* @event core.search_modify_post_row
				* @var	string	hilit					String to highlight
				* @var	array	row						Array with the post data
				* @var	string	u_hilit					Highlight string to be injected into URL
				* @var	string	view					Search results view mode
				* @var	array	zebra					Array with zebra data for the current user
				* @since 3.2.2-RC1
				*/
				$vars = array(
					'hilit',
					'row',
					'u_hilit',
					'view',
					'zebra',
				);
				extract($phpbb_dispatcher->trigger_event('core.search_modify_post_row', compact($vars)));

				// We pre-process some variables here for later usage
				$row['post_text'] = censor_text($row['post_text']);

				$text_only_message = $row['post_text'];
				// make list items visible as such
				if ($row['bbcode_uid'])
				{
					$text_only_message = str_replace('[*:' . $row['bbcode_uid'] . ']', '&sdot;&nbsp;', $text_only_message);
					// no BBCode in text only message
					strip_bbcode($text_only_message, $row['bbcode_uid']);
				}

				if ($return_chars == -1 || utf8_strlen($text_only_message) < ($return_chars + 3))
				{
					$row['display_text_only'] = false;

					// Does this post have an attachment? If so, add it to the list
					if ($row['post_attachment'] && $config['allow_attachments'])
					{
						$attach_list[$row['forum_id']][] = $row['post_id'];
					}
				}
				else
				{
					$row['post_text'] = $text_only_message;
					$row['display_text_only'] = true;
				}

				$rowset[] = $row;
			}
			$db->sql_freeresult($result);

			unset($text_only_message);

			// Pull attachment data
			if (count($attach_list))
			{
				$use_attach_list = $attach_list;
				$attach_list = array();

				foreach ($use_attach_list as $forum_id => $_list)
				{
					if ($auth->acl_get('u_download') && $auth->acl_get('f_download', $forum_id))
					{
						$attach_list = array_merge($attach_list, $_list);
					}
				}
			}

			if (count($attach_list))
			{
				$sql = 'SELECT *
					FROM ' . ATTACHMENTS_TABLE . '
					WHERE ' . $db->sql_in_set('post_msg_id', $attach_list) . '
						AND in_message = 0
					ORDER BY filetime DESC, post_msg_id ASC';
				$result = $db->sql_query($sql);

				while ($row = $db->sql_fetchrow($result))
				{
					$attachments[$row['post_msg_id']][] = $row;
				}
				$db->sql_freeresult($result);
			}
		}

		if ($hilit)
		{
			// Remove bad highlights
			$hilit_array = array_filter(explode('|', $hilit), 'strlen');
			foreach ($hilit_array as $key => $value)
			{
				$hilit_array[$key] = phpbb_clean_search_string($value);
				$hilit_array[$key] = str_replace('\*', '\w*?', preg_quote($hilit_array[$key], '#'));
				$hilit_array[$key] = preg_replace('#(^|\s)\\\\w\*\?(\s|$)#', '$1\w+?$2', $hilit_array[$key]);
			}
			$hilit = implode('|', $hilit_array);
		}

		/**
		* Modify the rowset data
		*
		* @event core.search_modify_rowset
		* @var	array	attachments				Array with posts attachments data
		* @var	string	hilit					String to highlight
		* @var	array	rowset					Array with the search results data
		* @var	string	show_results			String indicating the show results mode
		* @var	array	topic_tracking_info		Array with the topics tracking data
		* @var	string	u_hilit					Highlight string to be injected into URL
		* @var	string	view					Search results view mode
		* @var	array	zebra					Array with zebra data for the current user
		* @since 3.1.0-b4
		* @changed 3.1.0-b5 Added var show_results
		*/
		$vars = array(
			'attachments',
			'hilit',
			'rowset',
			'show_results',
			'topic_tracking_info',
			'u_hilit',
			'view',
			'zebra',
		);
		extract($phpbb_dispatcher->trigger_event('core.search_modify_rowset', compact($vars)));

		foreach ($rowset as $row)
		{
			$forum_id = $row['forum_id'];
			$result_topic_id = $row['topic_id'];
			$topic_title = censor_text($row['topic_title']);
			$replies = $phpbb_content_visibility->get_count('topic_posts', $row, $forum_id) - 1;

			$view_topic_url_params = "f=$forum_id&amp;t=$result_topic_id" . (($u_hilit) ? "&amp;hilit=$u_hilit" : '');
			$view_topic_url = append_sid("{$phpbb_root_path}viewtopic.$phpEx", $view_topic_url_params);

			if ($show_results == 'topics')
			{
				if ($config['load_db_track'] && $author_id === $user->data['user_id'])
				{
					$row['topic_posted'] = 1;
				}

				$folder_img = $folder_alt = $topic_type = '';
				topic_status($row, $replies, (isset($topic_tracking_info[$forum_id][$row['topic_id']]) && $row['topic_last_post_time'] > $topic_tracking_info[$forum_id][$row['topic_id']]) ? true : false, $folder_img, $folder_alt, $topic_type);

				$unread_topic = (isset($topic_tracking_info[$forum_id][$row['topic_id']]) && $row['topic_last_post_time'] > $topic_tracking_info[$forum_id][$row['topic_id']]) ? true : false;

				$topic_unapproved = (($row['topic_visibility'] == ITEM_UNAPPROVED || $row['topic_visibility'] == ITEM_REAPPROVE) && $auth->acl_get('m_approve', $forum_id)) ? true : false;
				$posts_unapproved = ($row['topic_visibility'] == ITEM_APPROVED && $row['topic_posts_unapproved'] && $auth->acl_get('m_approve', $forum_id)) ? true : false;
				$topic_deleted = $row['topic_visibility'] == ITEM_DELETED;
				$u_mcp_queue = ($topic_unapproved || $posts_unapproved) ? append_sid("{$phpbb_root_path}mcp.$phpEx", 'i=queue&amp;mode=' . (($topic_unapproved) ? 'approve_details' : 'unapproved_posts') . "&amp;t=$result_topic_id", true, $user->session_id) : '';
				$u_mcp_queue = (!$u_mcp_queue && $topic_deleted) ? append_sid("{$phpbb_root_path}mcp.$phpEx", "i=queue&amp;mode=deleted_topics&amp;t=$result_topic_id", true, $user->session_id) : $u_mcp_queue;

				$row['topic_title'] = preg_replace('#(?!<.*)(?<!\w)(' . $hilit . ')(?!\w|[^<>]*(?:</s(?:cript|tyle))?>)#isu', '<span class="posthilit">$1</span>', $row['topic_title']);

				$tpl_ary = array(
					'TOPIC_AUTHOR'				=> get_username_string('username', $row['topic_poster'], $row['topic_first_poster_name'], $row['topic_first_poster_colour']),
					'TOPIC_AUTHOR_COLOUR'		=> get_username_string('colour', $row['topic_poster'], $row['topic_first_poster_name'], $row['topic_first_poster_colour']),
					'TOPIC_AUTHOR_FULL'			=> get_username_string('full', $row['topic_poster'], $row['topic_first_poster_name'], $row['topic_first_poster_colour']),
					'FIRST_POST_TIME'			=> $user->format_date($row['topic_time']),
					'LAST_POST_SUBJECT'			=> $row['topic_last_post_subject'],
					'LAST_POST_TIME'			=> $user->format_date($row['topic_last_post_time']),
					'LAST_VIEW_TIME'			=> $user->format_date($row['topic_last_view_time']),
					'LAST_POST_AUTHOR'			=> get_username_string('username', $row['topic_last_poster_id'], $row['topic_last_poster_name'], $row['topic_last_poster_colour']),
					'LAST_POST_AUTHOR_COLOUR'	=> get_username_string('colour', $row['topic_last_poster_id'], $row['topic_last_poster_name'], $row['topic_last_poster_colour']),
					'LAST_POST_AUTHOR_FULL'		=> get_username_string('full', $row['topic_last_poster_id'], $row['topic_last_poster_name'], $row['topic_last_poster_colour']),

					'TOPIC_TYPE'		=> $topic_type,

					'TOPIC_IMG_STYLE'		=> $folder_img,
					'TOPIC_FOLDER_IMG'		=> $user->img($folder_img, $folder_alt),
					'TOPIC_FOLDER_IMG_ALT'	=> $user->lang[$folder_alt],

					'TOPIC_ICON_IMG'		=> (!empty($icons[$row['icon_id']])) ? $icons[$row['icon_id']]['img'] : '',
					'TOPIC_ICON_IMG_WIDTH'	=> (!empty($icons[$row['icon_id']])) ? $icons[$row['icon_id']]['width'] : '',
					'TOPIC_ICON_IMG_HEIGHT'	=> (!empty($icons[$row['icon_id']])) ? $icons[$row['icon_id']]['height'] : '',
					'ATTACH_ICON_IMG'		=> ($auth->acl_get('u_download') && $auth->acl_get('f_download', $forum_id) && $row['topic_attachment']) ? $user->img('icon_topic_attach', $user->lang['TOTAL_ATTACHMENTS']) : '',
					'UNAPPROVED_IMG'		=> ($topic_unapproved || $posts_unapproved) ? $user->img('icon_topic_unapproved', ($topic_unapproved) ? 'TOPIC_UNAPPROVED' : 'POSTS_UNAPPROVED') : '',

					'S_TOPIC_TYPE'			=> $row['topic_type'],
					'S_USER_POSTED'			=> (!empty($row['topic_posted'])) ? true : false,
					'S_UNREAD_TOPIC'		=> $unread_topic,

					'S_TOPIC_REPORTED'		=> (!empty($row['topic_reported']) && $auth->acl_get('m_report', $forum_id)) ? true : false,
					'S_TOPIC_UNAPPROVED'	=> $topic_unapproved,
					'S_POSTS_UNAPPROVED'	=> $posts_unapproved,
					'S_TOPIC_DELETED'		=> $topic_deleted,
					'S_HAS_POLL'			=> ($row['poll_start']) ? true : false,

					'U_LAST_POST'			=> append_sid("{$phpbb_root_path}viewtopic.$phpEx", $view_topic_url_params . '&amp;p=' . $row['topic_last_post_id']) . '#p' . $row['topic_last_post_id'],
					'U_LAST_POST_AUTHOR'	=> get_username_string('profile', $row['topic_last_poster_id'], $row['topic_last_poster_name'], $row['topic_last_poster_colour']),
					'U_TOPIC_AUTHOR'		=> get_username_string('profile', $row['topic_poster'], $row['topic_first_poster_name'], $row['topic_first_poster_colour']),
					'U_NEWEST_POST'			=> append_sid("{$phpbb_root_path}viewtopic.$phpEx", $view_topic_url_params . '&amp;view=unread') . '#unread',
					'U_MCP_REPORT'			=> append_sid("{$phpbb_root_path}mcp.$phpEx", 'i=reports&amp;mode=reports&amp;t=' . $result_topic_id, true, $user->session_id),
					'U_MCP_QUEUE'			=> $u_mcp_queue,
				);
			}
			else
			{
				if ((isset($zebra['foe']) && in_array($row['poster_id'], $zebra['foe'])) && (!$view || $view != 'show' || $post_id != $row['post_id']))
				{
					$template->assign_block_vars('searchresults', array(
						'S_IGNORE_POST' => true,

						'L_IGNORE_POST' => sprintf($user->lang['POST_BY_FOE'], $row['username'], "<a href=\"$u_search&amp;start=$start&amp;p=" . $row['post_id'] . '&amp;view=show#p' . $row['post_id'] . '">', '</a>'))
					);

					continue;
				}

				// Replace naughty words such as farty pants
				$row['post_subject'] = censor_text($row['post_subject']);

				if ($row['display_text_only'])
				{
					// now find context for the searched words
					$row['post_text'] = get_context($row['post_text'], array_filter(explode('|', $hilit), 'strlen'), $return_chars);
					$row['post_text'] = bbcode_nl2br($row['post_text']);
				}
				else
				{
					$parse_flags = ($row['bbcode_bitfield'] ? OPTION_FLAG_BBCODE : 0) | OPTION_FLAG_SMILIES;
					$row['post_text'] = generate_text_for_display($row['post_text'], $row['bbcode_uid'], $row['bbcode_bitfield'], $parse_flags, false);

					if (!empty($attachments[$row['post_id']]))
					{
						parse_attachments($forum_id, $row['post_text'], $attachments[$row['post_id']], $update_count);

						// we only display inline attachments
						unset($attachments[$row['post_id']]);
					}
				}

				if ($hilit)
				{
					// post highlighting
					$row['post_text'] = preg_replace('#(?!<.*)(?<!\w)(' . $hilit . ')(?!\w|[^<>]*(?:</s(?:cript|tyle))?>)#isu', '<span class="posthilit">$1</span>', $row['post_text']);
					$row['post_subject'] = preg_replace('#(?!<.*)(?<!\w)(' . $hilit . ')(?!\w|[^<>]*(?:</s(?:cript|tyle))?>)#isu', '<span class="posthilit">$1</span>', $row['post_subject']);
				}

				$tpl_ary = array(
					'POST_AUTHOR_FULL'		=> get_username_string('full', $row['poster_id'], $row['username'], $row['user_colour'], $row['post_username']),
					'POST_AUTHOR_COLOUR'	=> get_username_string('colour', $row['poster_id'], $row['username'], $row['user_colour'], $row['post_username']),
					'POST_AUTHOR'			=> get_username_string('username', $row['poster_id'], $row['username'], $row['user_colour'], $row['post_username']),
					'U_POST_AUTHOR'			=> get_username_string('profile', $row['poster_id'], $row['username'], $row['user_colour'], $row['post_username']),

					'POST_SUBJECT'		=> $row['post_subject'],
					'POST_DATE'			=> (!empty($row['post_time'])) ? $user->format_date($row['post_time']) : '',
					'MESSAGE'			=> $row['post_text']
				);
			}

			$tpl_ary = array_merge($tpl_ary, array(
				'FORUM_ID'			=> $forum_id,
				'TOPIC_ID'			=> $result_topic_id,
				'POST_ID'			=> ($show_results == 'posts') ? $row['post_id'] : false,

				'FORUM_TITLE'		=> $row['forum_name'],
				'TOPIC_TITLE'		=> $topic_title,
				'TOPIC_REPLIES'		=> $replies,
				'TOPIC_VIEWS'		=> $row['topic_views'],

				'U_VIEW_TOPIC'		=> $view_topic_url,
				'U_VIEW_FORUM'		=> append_sid("{$phpbb_root_path}viewforum.$phpEx", 'f=' . $forum_id),
				'U_VIEW_POST'		=> (!empty($row['post_id'])) ? append_sid("{$phpbb_root_path}viewtopic.$phpEx", "f=$forum_id&amp;t=" . $row['topic_id'] . '&amp;p=' . $row['post_id'] . (($u_hilit) ? '&amp;hilit=' . $u_hilit : '')) . '#p' . $row['post_id'] : '',
			));

			/**
			* Modify the topic data before it is assigned to the template
			*
			* @event core.search_modify_tpl_ary
			* @var	array	row				Array with topic data
			* @var	array	tpl_ary			Template block array with topic data
			* @var	string	show_results	Display topics or posts
			* @var	string	topic_title		Cleaned topic title
			* @var	int		replies			The number of topic replies
			* @var	string	view_topic_url	The URL to the topic
			* @var	string	folder_img		The folder image of the topic
			* @var	string	folder_alt		The alt attribute of the topic folder img
			* @var	int		topic_type		The topic type
			* @var	bool	unread_topic	Whether the topic has unread posts
			* @var	bool	topic_unapproved	Whether the topic is unapproved
			* @var	int		posts_unapproved	The number of unapproved posts
			* @var	bool	topic_deleted	Whether the topic has been deleted
			* @var	string	u_mcp_queue		The URL to the corresponding MCP queue page
			* @var	array	zebra			The zebra data of the current user
			* @var	array	attachments		All the attachments of the search results
			* @since 3.1.0-a1
			* @changed 3.1.0-b3 Added vars show_results, topic_title, replies,
			*		view_topic_url, folder_img, folder_alt, topic_type, unread_topic,
			*		topic_unapproved, posts_unapproved, topic_deleted, u_mcp_queue,
			*		zebra, attachments
			*/
			$vars = array(
				'row',
				'tpl_ary',
				'show_results',
				'topic_title',
				'replies',
				'view_topic_url',
				'folder_img',
				'folder_alt',
				'topic_type',
				'unread_topic',
				'topic_unapproved',
				'posts_unapproved',
				'topic_deleted',
				'u_mcp_queue',
				'zebra',
				'attachments',
			);
			extract($phpbb_dispatcher->trigger_event('core.search_modify_tpl_ary', compact($vars)));

			$template->assign_block_vars('searchresults', $tpl_ary);

			if ($show_results == 'topics')
			{
				$pagination->generate_template_pagination($view_topic_url, 'searchresults.pagination', 'start', $replies + 1, $config['posts_per_page'], 1, true, true);
			}
		}

		if ($topic_id && ($topic_id == $result_topic_id))
		{
			$template->assign_vars(array(
				'SEARCH_TOPIC'		=> $topic_title,
				'L_RETURN_TO_TOPIC'	=> $user->lang('RETURN_TO', $topic_title),
				'U_SEARCH_TOPIC'	=> $view_topic_url
			));
		}
	}
	unset($rowset);

	// Output header
	if ($found_more_search_matches)
	{
		$l_search_matches = $user->lang('FOUND_MORE_SEARCH_MATCHES', (int) $total_match_count);
	}
	else
	{
		$l_search_matches = $user->lang('FOUND_SEARCH_MATCHES', (int) $total_match_count);
	}

	// Check if search backend supports phrase search or not
	$phrase_search_disabled = '';
	if (strpos(html_entity_decode($keywords), '"') !== false && method_exists($search, 'supports_phrase_search'))
	{
		$phrase_search_disabled = $search->supports_phrase_search() ? false : true;
	}

	$pagination->generate_template_pagination($u_search, 'pagination', 'start', $total_match_count, $per_page, $start);

	$template->assign_vars(array(
		'SEARCH_TITLE'		=> $l_search_title,
		'SEARCH_MATCHES'	=> $l_search_matches,
		'SEARCH_WORDS'		=> $keywords,
		'SEARCHED_QUERY'	=> $search->get_search_query(),
		'IGNORED_WORDS'		=> (!empty($common_words)) ? implode(' ', $common_words) : '',

		'PHRASE_SEARCH_DISABLED'		=> $phrase_search_disabled,

		'TOTAL_MATCHES'		=> $total_match_count,
		'SEARCH_IN_RESULTS'	=> ($search_id) ? false : true,

		'S_SELECT_SORT_DIR'		=> $s_sort_dir,
		'S_SELECT_SORT_KEY'		=> $s_sort_key,
		'S_SELECT_SORT_DAYS'	=> $s_limit_days,
		'S_SEARCH_ACTION'		=> $u_search,
		'S_SHOW_TOPICS'			=> ($show_results == 'posts') ? false : true,

		'GOTO_PAGE_IMG'		=> $user->img('icon_post_target', 'GOTO_PAGE'),
		'NEWEST_POST_IMG'	=> $user->img('icon_topic_newest', 'VIEW_NEWEST_POST'),
		'REPORTED_IMG'		=> $user->img('icon_topic_reported', 'TOPIC_REPORTED'),
		'UNAPPROVED_IMG'	=> $user->img('icon_topic_unapproved', 'TOPIC_UNAPPROVED'),
		'DELETED_IMG'		=> $user->img('icon_topic_deleted', 'TOPIC_DELETED'),
		'POLL_IMG'			=> $user->img('icon_topic_poll', 'TOPIC_POLL'),
		'LAST_POST_IMG'		=> $user->img('icon_topic_latest', 'VIEW_LATEST_POST'),

		'U_SEARCH_WORDS'	=> $u_search,
	));

	/**
	* Modify the title and/or load data for the search results page
	*
	* @event core.search_results_modify_search_title
	* @var	int		author_id			ID of the author to search by
	* @var	string	l_search_title		The title of the search page
	* @var	string	search_id			Predefined search type name
	* @var	string	show_results		Search results output mode - topics or posts
	* @var	int		start				The starting id of the results
	* @var	int		total_match_count	The count of search results
	* @var	string	keywords			The search keywords
	* @since 3.1.0-RC4
	* @changed 3.1.6-RC1 Added total_match_count and keywords
	*/
	$vars = array(
		'author_id',
		'l_search_title',
		'search_id',
		'show_results',
		'start',
		'total_match_count',
		'keywords',
	);
	extract($phpbb_dispatcher->trigger_event('core.search_results_modify_search_title', compact($vars)));

	page_header(($l_search_title) ? $l_search_title : $user->lang['SEARCH']);

	$template->set_filenames(array(
		'body' => 'search_results.html')
	);
	make_jumpbox(append_sid("{$phpbb_root_path}viewforum.$phpEx"));

	page_footer();
}

// Search forum
$rowset = array();
$s_forums = '';
$sql = 'SELECT f.forum_id, f.forum_name, f.parent_id, f.forum_type, f.left_id, f.right_id, f.forum_password, f.enable_indexing, fa.user_id
	FROM ' . FORUMS_TABLE . ' f
	LEFT JOIN ' . FORUMS_ACCESS_TABLE . " fa ON (fa.forum_id = f.forum_id
		AND fa.session_id = '" . $db->sql_escape($user->session_id) . "')
	ORDER BY f.left_id ASC";
$result = $db->sql_query($sql);

while ($row = $db->sql_fetchrow($result))
{
	$rowset[(int) $row['forum_id']] = $row;
}
$db->sql_freeresult($result);

$right = $cat_right = $padding_inc = 0;
$padding = $forum_list = $holding = '';
$pad_store = array('0' => '');

/**
* Modify the forum select list for advanced search page
*
* @event core.search_modify_forum_select_list
* @var	array	rowset	Array with the forums list data
* @since 3.1.10-RC1
*/
$vars = array('rowset');
extract($phpbb_dispatcher->trigger_event('core.search_modify_forum_select_list', compact($vars)));

foreach ($rowset as $row)
{
	if ($row['forum_type'] == FORUM_CAT && ($row['left_id'] + 1 == $row['right_id']))
	{
		// Non-postable forum with no subforums, don't display
		continue;
	}

	if ($row['forum_type'] == FORUM_POST && ($row['left_id'] + 1 == $row['right_id']) && !$row['enable_indexing'])
	{
		// Postable forum with no subforums and indexing disabled, don't display
		continue;
	}

	if ($row['forum_type'] == FORUM_LINK || ($row['forum_password'] && !$row['user_id']))
	{
		// if this forum is a link or password protected (user has not entered the password yet) then skip to the next branch
		continue;
	}

	if ($row['left_id'] < $right)
	{
		$padding .= '&nbsp; &nbsp;';
		$pad_store[$row['parent_id']] = $padding;
	}
	else if ($row['left_id'] > $right + 1)
	{
		if (isset($pad_store[$row['parent_id']]))
		{
			$padding = $pad_store[$row['parent_id']];
		}
		else
		{
			continue;
		}
	}

	$right = $row['right_id'];

	if ($auth->acl_gets('!f_search', '!f_list', $row['forum_id']))
	{
		// if the user does not have permissions to search or see this forum skip only this forum/category
		continue;
	}

	$selected = (in_array($row['forum_id'], $search_forum)) ? ' selected="selected"' : '';

	if ($row['left_id'] > $cat_right)
	{
		// make sure we don't forget anything
		$s_forums .= $holding;
		$holding = '';
	}

	if ($row['right_id'] - $row['left_id'] > 1)
	{
		$cat_right = max($cat_right, $row['right_id']);

		$holding .= '<option value="' . $row['forum_id'] . '"' . $selected . '>' . $padding . $row['forum_name'] . '</option>';
	}
	else
	{
		$s_forums .= $holding . '<option value="' . $row['forum_id'] . '"' . $selected . '>' . $padding . $row['forum_name'] . '</option>';
		$holding = '';
	}
}

if ($holding)
{
	$s_forums .= $holding;
}

unset($pad_store);
unset($rowset);

if (!$s_forums)
{
	trigger_error('NO_SEARCH');
}

// Number of chars returned
$s_characters = '<option value="-1">' . $user->lang['ALL_AVAILABLE'] . '</option>';
$s_characters .= '<option value="0">0</option>';
$s_characters .= '<option value="25">25</option>';
$s_characters .= '<option value="50">50</option>';

for ($i = 100; $i <= 1000; $i += 100)
{
	$selected = ($i == 300) ? ' selected="selected"' : '';
	$s_characters .= '<option value="' . $i . '"' . $selected . '>' . $i . '</option>';
}

$s_hidden_fields = array('t' => $topic_id);

if ($_SID)
{
	$s_hidden_fields['sid'] = $_SID;
}

if (!empty($_EXTRA_URL))
{
	foreach ($_EXTRA_URL as $url_param)
	{
		$url_param = explode('=', $url_param, 2);
		$s_hidden_fields[$url_param[0]] = $url_param[1];
	}
}

$template->assign_vars(array(
	'S_SEARCH_ACTION'		=> append_sid("{$phpbb_root_path}search.$phpEx", false, true, 0), // We force no ?sid= appending by using 0
	'S_HIDDEN_FIELDS'		=> build_hidden_fields($s_hidden_fields),
	'S_CHARACTER_OPTIONS'	=> $s_characters,
	'S_FORUM_OPTIONS'		=> $s_forums,
	'S_SELECT_SORT_DIR'		=> $s_sort_dir,
	'S_SELECT_SORT_KEY'		=> $s_sort_key,
	'S_SELECT_SORT_DAYS'	=> $s_limit_days,
	'S_IN_SEARCH'			=> true,
));

// only show recent searches to search administrators
if ($auth->acl_get('a_search'))
{
	// Handle large objects differently for Oracle and MSSQL
	switch ($db->get_sql_layer())
	{
		case 'oracle':
			$sql = 'SELECT search_time, search_keywords
				FROM ' . SEARCH_RESULTS_TABLE . '
				WHERE dbms_lob.getlength(search_keywords) > 0
				ORDER BY search_time DESC';
		break;

		case 'mssql_odbc':
		case 'mssqlnative':
			$sql = 'SELECT search_time, search_keywords
				FROM ' . SEARCH_RESULTS_TABLE . '
				WHERE DATALENGTH(search_keywords) > 0
				ORDER BY search_time DESC';
		break;

		default:
			$sql = 'SELECT search_time, search_keywords
				FROM ' . SEARCH_RESULTS_TABLE . '
				WHERE search_keywords <> \'\'
				ORDER BY search_time DESC';
		break;
	}
	$result = $db->sql_query_limit($sql, 5);

	while ($row = $db->sql_fetchrow($result))
	{
		$keywords = $row['search_keywords'];

		$template->assign_block_vars('recentsearch', array(
			'KEYWORDS'	=> $keywords,
			'TIME'		=> $user->format_date($row['search_time']),

			'U_KEYWORDS'	=> append_sid("{$phpbb_root_path}search.$phpEx", 'keywords=' . urlencode(htmlspecialchars_decode($keywords)))
		));
	}
	$db->sql_freeresult($result);
}

// Output the basic page
page_header($user->lang['SEARCH']);

$template->set_filenames(array(
	'body' => 'search_body.html')
);
make_jumpbox(append_sid("{$phpbb_root_path}viewforum.$phpEx"));

page_footer();