PHP Util::strlen方法代码示例

/**
 * A very simple function to determine if an email address is "valid" for Elkarte.
 * A valid email for ElkArte is something that resebles an email (filter_var) and
 * is less than 255 characters (for database limits)
 *
 * @param string $value - The string to evaluate as valid email
 * @return bool|string - The email if valid, false if not a valid email
 */
function isValidEmail($value)
{
    $value = trim($value);
    if (filter_var($value, FILTER_VALIDATE_EMAIL) && Util::strlen($value) < 255) {
        return $value;
    } else {
        return false;
    }
}

/**
 * Recent topic list:
 *  [board] Subject by Poster Date
 *
 * @param int $num_recent
 * @param int[]|null $exclude_boards
 * @param bool|null $include_boards
 * @param string $output_method = 'echo'
 */
function ssi_recentTopics($num_recent = 8, $exclude_boards = null, $include_boards = null, $output_method = 'echo')
{
    global $settings, $scripturl, $txt, $user_info, $modSettings;
    $db = database();
    if ($exclude_boards === null && !empty($modSettings['recycle_enable']) && $modSettings['recycle_board'] > 0) {
        $exclude_boards = array($modSettings['recycle_board']);
    } else {
        $exclude_boards = empty($exclude_boards) ? array() : (is_array($exclude_boards) ? $exclude_boards : array($exclude_boards));
    }
    // Only some boards?.
    if (is_array($include_boards) || (int) $include_boards === $include_boards) {
        $include_boards = is_array($include_boards) ? $include_boards : array($include_boards);
    } elseif ($include_boards != null) {
        $output_method = $include_boards;
        $include_boards = array();
    }
    require_once SUBSDIR . '/MessageIndex.subs.php';
    $icon_sources = MessageTopicIcons();
    // Find all the posts in distinct topics. Newer ones will have higher IDs.
    $request = $db->query('', '
		SELECT
			t.id_topic, b.id_board, b.name AS board_name
		FROM {db_prefix}topics AS t
			INNER JOIN {db_prefix}messages AS ml ON (ml.id_msg = t.id_last_msg)
			LEFT JOIN {db_prefix}boards AS b ON (b.id_board = t.id_board)
		WHERE t.id_last_msg >= {int:min_message_id}' . (empty($exclude_boards) ? '' : '
			AND b.id_board NOT IN ({array_int:exclude_boards})') . '' . (empty($include_boards) ? '' : '
			AND b.id_board IN ({array_int:include_boards})') . '
			AND {query_wanna_see_board}' . ($modSettings['postmod_active'] ? '
			AND t.approved = {int:is_approved}
			AND ml.approved = {int:is_approved}' : '') . '
		ORDER BY t.id_last_msg DESC
		LIMIT ' . $num_recent, array('include_boards' => empty($include_boards) ? '' : $include_boards, 'exclude_boards' => empty($exclude_boards) ? '' : $exclude_boards, 'min_message_id' => $modSettings['maxMsgID'] - 35 * min($num_recent, 5), 'is_approved' => 1));
    $topics = array();
    while ($row = $db->fetch_assoc($request)) {
        $topics[$row['id_topic']] = $row;
    }
    $db->free_result($request);
    // Did we find anything? If not, bail.
    if (empty($topics)) {
        return array();
    }
    // Find all the posts in distinct topics. Newer ones will have higher IDs.
    $request = $db->query('substring', '
		SELECT
			mf.poster_time, mf.subject, ml.id_topic, mf.id_member, ml.id_msg, t.num_replies, t.num_views, mg.online_color,
			IFNULL(mem.real_name, mf.poster_name) AS poster_name, ' . ($user_info['is_guest'] ? '1 AS is_read, 0 AS new_from' : '
			IFNULL(lt.id_msg, IFNULL(lmr.id_msg, 0)) >= ml.id_msg_modified AS is_read,
			IFNULL(lt.id_msg, IFNULL(lmr.id_msg, -1)) + 1 AS new_from') . ', SUBSTRING(mf.body, 1, 384) AS body, mf.smileys_enabled, mf.icon
		FROM {db_prefix}topics AS t
			INNER JOIN {db_prefix}messages AS ml ON (ml.id_msg = t.id_last_msg)
			INNER JOIN {db_prefix}messages AS mf ON (mf.id_msg = t.id_last_msg)
			LEFT JOIN {db_prefix}members AS mem ON (mem.id_member = mf.id_member)' . (!$user_info['is_guest'] ? '
			LEFT JOIN {db_prefix}log_topics AS lt ON (lt.id_topic = t.id_topic AND lt.id_member = {int:current_member})
			LEFT JOIN {db_prefix}log_mark_read AS lmr ON (lmr.id_board = t.id_board AND lmr.id_member = {int:current_member})' : '') . '
			LEFT JOIN {db_prefix}membergroups AS mg ON (mg.id_group = mem.id_group)
		WHERE t.id_topic IN ({array_int:topic_list})', array('current_member' => $user_info['id'], 'topic_list' => array_keys($topics)));
    $posts = array();
    while ($row = $db->fetch_assoc($request)) {
        $row['body'] = strip_tags(strtr(parse_bbc($row['body'], $row['smileys_enabled'], $row['id_msg']), array('<br />' => '&#10;')));
        if (Util::strlen($row['body']) > 128) {
            $row['body'] = Util::substr($row['body'], 0, 128) . '...';
        }
        // Censor the subject.
        censorText($row['subject']);
        censorText($row['body']);
        if (!empty($modSettings['messageIconChecks_enable']) && !isset($icon_sources[$row['icon']])) {
            $icon_sources[$row['icon']] = file_exists($settings['theme_dir'] . '/images/post/' . $row['icon'] . '.png') ? 'images_url' : 'default_images_url';
        }
        // Build the array.
        $posts[] = array('board' => array('id' => $topics[$row['id_topic']]['id_board'], 'name' => $topics[$row['id_topic']]['board_name'], 'href' => $scripturl . '?board=' . $topics[$row['id_topic']]['id_board'] . '.0', 'link' => '<a href="' . $scripturl . '?board=' . $topics[$row['id_topic']]['id_board'] . '.0">' . $topics[$row['id_topic']]['board_name'] . '</a>'), 'topic' => $row['id_topic'], 'poster' => array('id' => $row['id_member'], 'name' => $row['poster_name'], 'href' => empty($row['id_member']) ? '' : $scripturl . '?action=profile;u=' . $row['id_member'], 'link' => empty($row['id_member']) ? $row['poster_name'] : '<a href="' . $scripturl . '?action=profile;u=' . $row['id_member'] . '">' . $row['poster_name'] . '</a>'), 'subject' => $row['subject'], 'replies' => $row['num_replies'], 'views' => $row['num_views'], 'short_subject' => Util::shorten_text($row['subject'], 25), 'preview' => $row['body'], 'time' => standardTime($row['poster_time']), 'html_time' => htmlTime($row['poster_time']), 'timestamp' => forum_time(true, $row['poster_time']), 'href' => $scripturl . '?topic=' . $row['id_topic'] . '.msg' . $row['id_msg'] . ';topicseen#new', 'link' => '<a href="' . $scripturl . '?topic=' . $row['id_topic'] . '.msg' . $row['id_msg'] . '#new" rel="nofollow">' . $row['subject'] . '</a>', 'new' => !empty($row['is_read']), 'is_new' => empty($row['is_read']), 'new_from' => $row['new_from'], 'icon' => '<img src="' . $settings[$icon_sources[$row['icon']]] . '/post/' . $row['icon'] . '.png" style="vertical-align: middle;" alt="' . $row['icon'] . '" />');
    }
    $db->free_result($request);
    // Just return it.
    if ($output_method != 'echo' || empty($posts)) {
        return $posts;
    }
    echo '
		<table class="ssi_table">';
    foreach ($posts as $post) {
        echo '
			<tr>
				<td class="righttext top">
					[', $post['board']['link'], ']
				</td>
				<td class="top">
					<a href="', $post['href'], '">', $post['subject'], '</a>
					', $txt['by'], ' ', $post['poster']['link'], '
					', !$post['is_new'] ? '' : '<a href="' . $scripturl . '?topic=' . $post['topic'] . '.msg' . $post['new_from'] . ';topicseen#new" rel="nofollow"><span class="new_posts">' . $txt['new'] . '</span></a>', '
				</td>
				<td class="righttext">
//.........这里部分代码省略.........

/**
 * Makes sure the calendar post is valid.
 *
 * @package Calendar
 */
function validateEventPost()
{
    global $modSettings;
    if (!isset($_POST['deleteevent'])) {
        // No month?  No year?
        if (!isset($_POST['month'])) {
            fatal_lang_error('event_month_missing', false);
        }
        if (!isset($_POST['year'])) {
            fatal_lang_error('event_year_missing', false);
        }
        // Check the month and year...
        if ($_POST['month'] < 1 || $_POST['month'] > 12) {
            fatal_lang_error('invalid_month', false);
        }
        if ($_POST['year'] < $modSettings['cal_minyear'] || $_POST['year'] > $modSettings['cal_maxyear']) {
            fatal_lang_error('invalid_year', false);
        }
    }
    // Make sure they're allowed to post...
    isAllowedTo('calendar_post');
    if (isset($_POST['span'])) {
        // Make sure it's turned on and not some fool trying to trick it.
        if (empty($modSettings['cal_allowspan'])) {
            fatal_lang_error('no_span', false);
        }
        if ($_POST['span'] < 1 || $_POST['span'] > $modSettings['cal_maxspan']) {
            fatal_lang_error('invalid_days_numb', false);
        }
    }
    // There is no need to validate the following values if we are just deleting the event.
    if (!isset($_POST['deleteevent'])) {
        // No day?
        if (!isset($_POST['day'])) {
            fatal_lang_error('event_day_missing', false);
        }
        if (!isset($_POST['evtitle']) && !isset($_POST['subject'])) {
            fatal_lang_error('event_title_missing', false);
        } elseif (!isset($_POST['evtitle'])) {
            $_POST['evtitle'] = $_POST['subject'];
        }
        // Bad day?
        if (!checkdate($_POST['month'], $_POST['day'], $_POST['year'])) {
            fatal_lang_error('invalid_date', false);
        }
        // No title?
        if (Util::htmltrim($_POST['evtitle']) === '') {
            fatal_lang_error('no_event_title', false);
        }
        if (Util::strlen($_POST['evtitle']) > 100) {
            $_POST['evtitle'] = Util::substr($_POST['evtitle'], 0, 100);
        }
        $_POST['evtitle'] = str_replace(';', '', $_POST['evtitle']);
    }
}

//.........这里部分代码省略.........
		LIMIT 2', array('msg_list' => $splitMessages, 'id_topic' => $split1_ID_TOPIC));
    while ($row = $db->fetch_assoc($request)) {
        // As before get the right first and last message dependant on approved state...
        if (empty($split2_first_msg) || $row['myid_first_msg'] < $split2_first_msg) {
            $split2_first_msg = $row['myid_first_msg'];
        }
        if (empty($split2_last_msg) || $row['approved']) {
            $split2_last_msg = $row['myid_last_msg'];
        }
        // Then do the counts again...
        if ($row['approved']) {
            $split2_approved = true;
            $split2_replies = $row['message_count'] - 1;
            $split2_unapprovedposts = 0;
        } else {
            // Should this one be approved??
            if ($split2_first_msg == $row['myid_first_msg']) {
                $split2_approved = false;
            }
            if (!isset($split2_replies)) {
                $split2_replies = 0;
            } elseif (!$split2_approved) {
                $split2_replies++;
            }
            $split2_unapprovedposts = $row['message_count'];
        }
    }
    $db->free_result($request);
    $split2_firstMem = getMsgMemberID($split2_first_msg);
    $split2_lastMem = getMsgMemberID($split2_last_msg);
    // No database changes yet, so let's double check to see if everything makes at least a little sense.
    if ($split1_first_msg <= 0 || $split1_last_msg <= 0 || $split2_first_msg <= 0 || $split2_last_msg <= 0 || $split1_replies < 0 || $split2_replies < 0 || $split1_unapprovedposts < 0 || $split2_unapprovedposts < 0 || !isset($split1_approved) || !isset($split2_approved)) {
        fatal_lang_error('cant_find_messages');
    }
    // You cannot split off the first message of a topic.
    if ($split1_first_msg > $split2_first_msg) {
        fatal_lang_error('split_first_post', false);
    }
    // We're off to insert the new topic!  Use 0 for now to avoid UNIQUE errors.
    $db->insert('', '{db_prefix}topics', array('id_board' => 'int', 'id_member_started' => 'int', 'id_member_updated' => 'int', 'id_first_msg' => 'int', 'id_last_msg' => 'int', 'num_replies' => 'int', 'unapproved_posts' => 'int', 'approved' => 'int', 'is_sticky' => 'int'), array((int) $id_board, $split2_firstMem, $split2_lastMem, 0, 0, $split2_replies, $split2_unapprovedposts, (int) $split2_approved, 0), array('id_topic'));
    $split2_ID_TOPIC = $db->insert_id('{db_prefix}topics', 'id_topic');
    if ($split2_ID_TOPIC <= 0) {
        fatal_lang_error('cant_insert_topic');
    }
    // Move the messages over to the other topic.
    $new_subject = strtr(Util::htmltrim(Util::htmlspecialchars($new_subject)), array("\r" => '', "\n" => '', "\t" => ''));
    // Check the subject length.
    if (Util::strlen($new_subject) > 100) {
        $new_subject = Util::substr($new_subject, 0, 100);
    }
    // Valid subject?
    if ($new_subject != '') {
        $db->query('', '
			UPDATE {db_prefix}messages
			SET
				id_topic = {int:id_topic},
				subject = CASE WHEN id_msg = {int:split_first_msg} THEN {string:new_subject} ELSE {string:new_subject_replies} END
			WHERE id_msg IN ({array_int:split_msgs})', array('split_msgs' => $splitMessages, 'id_topic' => $split2_ID_TOPIC, 'new_subject' => $new_subject, 'split_first_msg' => $split2_first_msg, 'new_subject_replies' => $txt['response_prefix'] . $new_subject));
        // Cache the new topics subject... we can do it now as all the subjects are the same!
        updateStats('subject', $split2_ID_TOPIC, $new_subject);
    }
    // Any associated reported posts better follow...
    require_once SUBSDIR . '/Topic.subs.php';
    updateSplitTopics(array('splitMessages' => $splitMessages, 'split2_ID_TOPIC' => $split2_ID_TOPIC, 'split1_replies' => $split1_replies, 'split1_first_msg' => $split1_first_msg, 'split1_last_msg' => $split1_last_msg, 'split1_firstMem' => $split1_firstMem, 'split1_lastMem' => $split1_lastMem, 'split1_unapprovedposts' => $split1_unapprovedposts, 'split1_ID_TOPIC' => $split1_ID_TOPIC, 'split2_first_msg' => $split2_first_msg, 'split2_last_msg' => $split2_last_msg, 'split2_ID_TOPIC' => $split2_ID_TOPIC, 'split2_approved' => $split2_approved), $id_board);
    require_once SUBSDIR . '/FollowUps.subs.php';
    // Let's see if we can create a stronger bridge between the two topics
    // @todo not sure what message from the oldest topic I should link to the new one, so I'll go with the first
    linkMessages($split1_first_msg, $split2_ID_TOPIC);
    // Copy log topic entries.
    // @todo This should really be chunked.
    $request = $db->query('', '
		SELECT id_member, id_msg, unwatched
		FROM {db_prefix}log_topics
		WHERE id_topic = {int:id_topic}', array('id_topic' => (int) $split1_ID_TOPIC));
    if ($db->num_rows($request) > 0) {
        $replaceEntries = array();
        while ($row = $db->fetch_assoc($request)) {
            $replaceEntries[] = array($row['id_member'], $split2_ID_TOPIC, $row['id_msg'], $row['unwatched']);
        }
        require_once SUBSDIR . '/Topic.subs.php';
        markTopicsRead($replaceEntries, false);
        unset($replaceEntries);
    }
    $db->free_result($request);
    // Housekeeping.
    updateTopicStats();
    updateLastMessages($id_board);
    logAction('split', array('topic' => $split1_ID_TOPIC, 'new_topic' => $split2_ID_TOPIC, 'board' => $id_board));
    // Notify people that this topic has been split?
    require_once SUBSDIR . '/Notification.subs.php';
    sendNotifications($split1_ID_TOPIC, 'split');
    // If there's a search index that needs updating, update it...
    require_once SUBSDIR . '/Search.subs.php';
    $searchAPI = findSearchAPI();
    if (is_callable(array($searchAPI, 'topicSplit'))) {
        $searchAPI->topicSplit($split2_ID_TOPIC, $splitMessages);
    }
    // Return the ID of the newly created topic.
    return $split2_ID_TOPIC;
}

//.........这里部分代码省略.........
    $memory_limit = memoryReturnBytes(ini_get('memory_limit')) / 4;
    $current_used_memory = 0;
    $db_backup = '';
    $output_function = 'un_compressed';
    @ob_end_clean();
    // Start saving the output... (don't do it otherwise for memory reasons.)
    if (isset($_REQUEST['compress']) && function_exists('gzencode')) {
        $output_function = 'gzencode';
        // Send faked headers so it will just save the compressed output as a gzip.
        header('Content-Type: application/x-gzip');
        header('Accept-Ranges: bytes');
        header('Content-Encoding: none');
        // Gecko browsers... don't like this. (Mozilla, Firefox, etc.)
        if (!isBrowser('gecko')) {
            header('Content-Transfer-Encoding: binary');
        }
        // The file extension will include .gz...
        $extension = '.sql.gz';
    } else {
        // Get rid of the gzipping alreading being done.
        if (!empty($modSettings['enableCompressedOutput'])) {
            @ob_end_clean();
        } elseif (ob_get_length() != 0) {
            ob_clean();
        }
        // Tell the client to save this file, even though it's text.
        header('Content-Type: ' . (isBrowser('ie') || isBrowser('opera') ? 'application/octetstream' : 'application/octet-stream'));
        header('Content-Encoding: none');
        // This time the extension should just be .sql.
        $extension = '.sql';
    }
    // This should turn off the session URL parser.
    $scripturl = '';
    // Send the proper headers to let them download this file.
    header('Content-Disposition: attachment; filename="' . $db_name . '-' . (empty($_REQUEST['struct']) ? 'data' : (empty($_REQUEST['data']) ? 'structure' : 'complete')) . '_' . strftime('%Y-%m-%d') . $extension . '"');
    header('Cache-Control: private');
    header('Connection: close');
    // This makes things simpler when using it so very very often.
    $crlf = "\r\n";
    // SQL Dump Header.
    $db_chunks = '-- ==========================================================' . $crlf . '--' . $crlf . '-- Database dump of tables in `' . $db_name . '`' . $crlf . '-- ' . standardTime(time(), false) . $crlf . '--' . $crlf . '-- ==========================================================' . $crlf . $crlf;
    // Get all tables in the database....for our installation
    $real_prefix = preg_match('~^(`?)(.+?)\\1\\.(.*?)$~', $db_prefix, $match) === 1 ? $match[3] : $db_prefix;
    $tables = $database->db_list_tables(false, $real_prefix . '%');
    // Dump each table.
    foreach ($tables as $tableName) {
        // Are we dumping the structures?
        if (isset($_REQUEST['struct'])) {
            $db_chunks .= $crlf . '--' . $crlf . '-- Table structure for table `' . $tableName . '`' . $crlf . '--' . $crlf . $crlf . $database->db_table_sql($tableName) . ';' . $crlf;
        } else {
            // This is needed to speedup things later
            $database->db_table_sql($tableName);
        }
        // How about the data?
        if (!isset($_REQUEST['data']) || substr($tableName, -10) == 'log_errors') {
            continue;
        }
        $first_round = true;
        $close_table = false;
        // Are there any rows in this table?
        while ($get_rows = $database->insert_sql($tableName, $first_round)) {
            if (empty($get_rows)) {
                break;
            }
            // Time is what we need here!
            if (function_exists('apache_reset_timeout')) {
                @apache_reset_timeout();
            } elseif (!empty($time_limit) && $start_time + $time_limit - 20 > time()) {
                $start_time = time();
                @set_time_limit(150);
            }
            // for the first pass, start the output with a custom line...
            if ($first_round) {
                $db_chunks .= $crlf . '--' . $crlf . '-- Dumping data in `' . $tableName . '`' . $crlf . '--' . $crlf . $crlf;
                $first_round = false;
            }
            $db_chunks .= $get_rows;
            $current_used_memory += Util::strlen($db_chunks);
            $db_backup .= $db_chunks;
            unset($db_chunks);
            $db_chunks = '';
            if ($current_used_memory > $memory_limit) {
                echo $output_function($db_backup);
                $current_used_memory = 0;
                // This is probably redundant
                unset($db_backup);
                $db_backup = '';
            }
            $close_table = true;
        }
        // No rows to get - skip it.
        if ($close_table) {
            $db_backup .= '-- --------------------------------------------------------' . $crlf;
        }
    }
    // write the last line
    $db_backup .= $crlf . '-- Done' . $crlf;
    echo $output_function($db_backup);
    exit;
}

 /**
  * Fulltext_Search::prepareIndexes()
  *
  * Do we have to do some work with the words we are searching for to prepare them?
  *
  * @param string $word
  * @param mixed[] $wordsSearch
  * @param string[] $wordsExclude
  * @param boolean $isExcluded
  */
 public function prepareIndexes($word, &$wordsSearch, &$wordsExclude, $isExcluded)
 {
     global $modSettings;
     $subwords = text2words($word, null, false);
     if (empty($modSettings['search_force_index'])) {
         // A boolean capable search engine and not forced to only use an index, we may use a non indexed search
         // this is harder on the server so we are restrictive here
         if (count($subwords) > 1 && preg_match('~[.:@$]~', $word)) {
             // Using special characters that a full index would ignore and the remaining words are
             // short which would also be ignored
             if (Util::strlen(current($subwords)) < $this->min_word_length && Util::strlen(next($subwords)) < $this->min_word_length) {
                 $wordsSearch['words'][] = trim($word, '/*- ');
                 $wordsSearch['complex_words'][] = count($subwords) === 1 ? $word : '"' . $word . '"';
             }
         } elseif (Util::strlen(trim($word, '/*- ')) < $this->min_word_length) {
             // Short words have feelings too
             $wordsSearch['words'][] = trim($word, '/*- ');
             $wordsSearch['complex_words'][] = count($subwords) === 1 ? $word : '"' . $word . '"';
         }
     }
     $fulltextWord = count($subwords) === 1 ? $word : '"' . $word . '"';
     $wordsSearch['indexed_words'][] = $fulltextWord;
     if ($isExcluded) {
         $wordsExclude[] = $fulltextWord;
     }
 }

//.........这里部分代码省略.........
                    $txt['profile_error_signature_max_font_size'] = sprintf($txt['profile_error_signature_max_font_size'], $limit_broke);
                    return 'signature_max_font_size';
                }
            }
        }
        // The difficult one - image sizes! Don't error on this - just fix it.
        if (!empty($sig_limits[5]) || !empty($sig_limits[6])) {
            // Get all BBC tags...
            preg_match_all('~\\[img(\\s+width=([\\d]+))?(\\s+height=([\\d]+))?(\\s+width=([\\d]+))?\\s*\\](?:<br />)*([^<">]+?)(?:<br />)*\\[/img\\]~i', $unparsed_signature, $matches);
            // ... and all HTML ones.
            preg_match_all('~<img\\s+src=(?:")?((?:http://|ftp://|https://|ftps://).+?)(?:")?(?:\\s+alt=(?:")?(.*?)(?:")?)?(?:\\s?/)?>~i', $unparsed_signature, $matches2, PREG_PATTERN_ORDER);
            // And stick the HTML in the BBC.
            if (!empty($matches2)) {
                foreach ($matches2[0] as $ind => $dummy) {
                    $matches[0][] = $matches2[0][$ind];
                    $matches[1][] = '';
                    $matches[2][] = '';
                    $matches[3][] = '';
                    $matches[4][] = '';
                    $matches[5][] = '';
                    $matches[6][] = '';
                    $matches[7][] = $matches2[1][$ind];
                }
            }
            $replaces = array();
            // Try to find all the images!
            if (!empty($matches)) {
                foreach ($matches[0] as $key => $image) {
                    $width = -1;
                    $height = -1;
                    // Does it have predefined restraints? Width first.
                    if ($matches[6][$key]) {
                        $matches[2][$key] = $matches[6][$key];
                    }
                    if ($matches[2][$key] && $sig_limits[5] && $matches[2][$key] > $sig_limits[5]) {
                        $width = $sig_limits[5];
                        $matches[4][$key] = $matches[4][$key] * ($width / $matches[2][$key]);
                    } elseif ($matches[2][$key]) {
                        $width = $matches[2][$key];
                    }
                    // ... and height.
                    if ($matches[4][$key] && $sig_limits[6] && $matches[4][$key] > $sig_limits[6]) {
                        $height = $sig_limits[6];
                        if ($width != -1) {
                            $width = $width * ($height / $matches[4][$key]);
                        }
                    } elseif ($matches[4][$key]) {
                        $height = $matches[4][$key];
                    }
                    // If the dimensions are still not fixed - we need to check the actual image.
                    if ($width == -1 && $sig_limits[5] || $height == -1 && $sig_limits[6]) {
                        require_once SUBSDIR . '/Attachments.subs.php';
                        $sizes = url_image_size($matches[7][$key]);
                        if (is_array($sizes)) {
                            // Too wide?
                            if ($sizes[0] > $sig_limits[5] && $sig_limits[5]) {
                                $width = $sig_limits[5];
                                $sizes[1] = $sizes[1] * ($width / $sizes[0]);
                            }
                            // Too high?
                            if ($sizes[1] > $sig_limits[6] && $sig_limits[6]) {
                                $height = $sig_limits[6];
                                if ($width == -1) {
                                    $width = $sizes[0];
                                }
                                $width = $width * ($height / $sizes[1]);
                            } elseif ($width != -1) {
                                $height = $sizes[1];
                            }
                        }
                    }
                    // Did we come up with some changes? If so remake the string.
                    if ($width != -1 || $height != -1) {
                        $replaces[$image] = '[img' . ($width != -1 ? ' width=' . round($width) : '') . ($height != -1 ? ' height=' . round($height) : '') . ']' . $matches[7][$key] . '[/img]';
                    }
                }
                if (!empty($replaces)) {
                    $value = str_replace(array_keys($replaces), array_values($replaces), $value);
                }
            }
        }
        // Any disabled BBC?
        $disabledSigBBC = implode('|', $disabledTags);
        if (!empty($disabledSigBBC)) {
            if (preg_match('~\\[(' . $disabledSigBBC . '[ =\\]/])~i', $unparsed_signature, $matches) !== false && isset($matches[1])) {
                $disabledTags = array_unique($disabledTags);
                $txt['profile_error_signature_disabled_bbc'] = sprintf($txt['profile_error_signature_disabled_bbc'], implode(', ', $disabledTags));
                return 'signature_disabled_bbc';
            }
        }
    }
    preparsecode($value);
    // Too long?
    if (!allowedTo('admin_forum') && !empty($sig_limits[1]) && Util::strlen(str_replace('<br />', "\n", $value)) > $sig_limits[1]) {
        $_POST['signature'] = trim(htmlspecialchars(str_replace('<br />', "\n", $value), ENT_QUOTES, 'UTF-8'));
        $txt['profile_error_signature_max_length'] = sprintf($txt['profile_error_signature_max_length'], $sig_limits[1]);
        return 'signature_max_length';
    }
    return true;
}

    /**
     * Used to edit the body or subject of a message inline
     * called from action=jsmodify from script and topic js
     */
    public function action_jsmodify()
    {
        global $modSettings, $board, $topic;
        global $user_info, $context;
        $db = database();
        // We have to have a topic!
        if (empty($topic)) {
            obExit(false);
        }
        checkSession('get');
        require_once SUBSDIR . '/Post.subs.php';
        // Assume the first message if no message ID was given.
        $request = $db->query('', '
			SELECT
				t.locked, t.num_replies, t.id_member_started, t.id_first_msg,
				m.id_msg, m.id_member, m.poster_time, m.subject, m.smileys_enabled, m.body, m.icon,
				m.modified_time, m.modified_name, m.approved
			FROM {db_prefix}messages AS m
				INNER JOIN {db_prefix}topics AS t ON (t.id_topic = {int:current_topic})
			WHERE m.id_msg = {raw:id_msg}
				AND m.id_topic = {int:current_topic}' . (allowedTo('modify_any') || allowedTo('approve_posts') ? '' : (!$modSettings['postmod_active'] ? '
				AND (m.id_member != {int:guest_id} AND m.id_member = {int:current_member})' : '
				AND (m.approved = {int:is_approved} OR (m.id_member != {int:guest_id} AND m.id_member = {int:current_member}))')), array('current_member' => $user_info['id'], 'current_topic' => $topic, 'id_msg' => empty($_REQUEST['msg']) ? 't.id_first_msg' : (int) $_REQUEST['msg'], 'is_approved' => 1, 'guest_id' => 0));
        if ($db->num_rows($request) == 0) {
            fatal_lang_error('no_board', false);
        }
        $row = $db->fetch_assoc($request);
        $db->free_result($request);
        // Change either body or subject requires permissions to modify messages.
        if (isset($_POST['message']) || isset($_POST['subject']) || isset($_REQUEST['icon'])) {
            if (!empty($row['locked'])) {
                isAllowedTo('moderate_board');
            }
            if ($row['id_member'] == $user_info['id'] && !allowedTo('modify_any')) {
                if ((!$modSettings['postmod_active'] || $row['approved']) && !empty($modSettings['edit_disable_time']) && $row['poster_time'] + ($modSettings['edit_disable_time'] + 5) * 60 < time()) {
                    fatal_lang_error('modify_post_time_passed', false);
                } elseif ($row['id_member_started'] == $user_info['id'] && !allowedTo('modify_own')) {
                    isAllowedTo('modify_replies');
                } else {
                    isAllowedTo('modify_own');
                }
            } elseif ($row['id_member_started'] == $user_info['id'] && !allowedTo('modify_any')) {
                isAllowedTo('modify_replies');
            } else {
                isAllowedTo('modify_any');
            }
            // Only log this action if it wasn't your message.
            $moderationAction = $row['id_member'] != $user_info['id'];
        }
        $post_errors = Error_Context::context('post', 1);
        if (isset($_POST['subject']) && Util::htmltrim(Util::htmlspecialchars($_POST['subject'])) !== '') {
            $_POST['subject'] = strtr(Util::htmlspecialchars($_POST['subject']), array("\r" => '', "\n" => '', "\t" => ''));
            // Maximum number of characters.
            if (Util::strlen($_POST['subject']) > 100) {
                $_POST['subject'] = Util::substr($_POST['subject'], 0, 100);
            }
        } elseif (isset($_POST['subject'])) {
            $post_errors->addError('no_subject');
            unset($_POST['subject']);
        }
        if (isset($_POST['message'])) {
            if (Util::htmltrim(Util::htmlspecialchars($_POST['message'])) === '') {
                $post_errors->addError('no_message');
                unset($_POST['message']);
            } elseif (!empty($modSettings['max_messageLength']) && Util::strlen($_POST['message']) > $modSettings['max_messageLength']) {
                $post_errors->addError(array('long_message', array($modSettings['max_messageLength'])));
                unset($_POST['message']);
            } else {
                $_POST['message'] = Util::htmlspecialchars($_POST['message'], ENT_QUOTES);
                preparsecode($_POST['message']);
                if (Util::htmltrim(strip_tags(parse_bbc($_POST['message'], false), '<img>')) === '') {
                    $post_errors->addError('no_message');
                    unset($_POST['message']);
                }
            }
        }
        if (isset($_POST['lock'])) {
            if (!allowedTo(array('lock_any', 'lock_own')) || !allowedTo('lock_any') && $user_info['id'] != $row['id_member']) {
                unset($_POST['lock']);
            } elseif (!allowedTo('lock_any')) {
                if ($row['locked'] == 1) {
                    unset($_POST['lock']);
                } else {
                    $_POST['lock'] = empty($_POST['lock']) ? 0 : 2;
                }
            } elseif (!empty($row['locked']) && !empty($_POST['lock']) || $_POST['lock'] == $row['locked']) {
                unset($_POST['lock']);
            } else {
                $_POST['lock'] = empty($_POST['lock']) ? 0 : 1;
            }
        }
        if (isset($_POST['sticky']) && !allowedTo('make_sticky')) {
            unset($_POST['sticky']);
        }
        if (!$post_errors->hasErrors()) {
            $msgOptions = array('id' => $row['id_msg'], 'subject' => isset($_POST['subject']) ? $_POST['subject'] : null, 'body' => isset($_POST['message']) ? $_POST['message'] : null, 'icon' => isset($_REQUEST['icon']) ? preg_replace('~[\\./\\\\*\':"<>]~', '', $_REQUEST['icon']) : null);
//.........这里部分代码省略.........

 /**
  * This function offers up a download of an event in iCal 2.0 format.
  *
  * follows the conventions in RFC5546 http://tools.ietf.org/html/rfc5546
  * sets events as all day events since we don't have hourly events
  * will honor and set multi day events
  * sets a sequence number if the event has been modified.
  * Accessed by action=calendar;sa=ical
  *
  * @todo .... allow for week or month export files as well?
  */
 public function action_ical()
 {
     global $forum_version, $modSettings, $webmaster_email, $mbname;
     // What do you think you export?
     isAllowedTo('calendar_view');
     // You can't export if the calendar export feature is off.
     if (empty($modSettings['cal_export'])) {
         fatal_lang_error('calendar_export_off', false);
     }
     // Goes without saying that this is required.
     if (!isset($_REQUEST['eventid'])) {
         fatal_lang_error('no_access', false);
     }
     // This is kinda wanted.
     require_once SUBSDIR . '/Calendar.subs.php';
     // Load up the event in question and check it exists.
     $event = getEventProperties($_REQUEST['eventid']);
     if ($event === false) {
         fatal_lang_error('no_access', false);
     }
     // Check the title isn't too long - iCal requires some formatting if so.
     $title = str_split($event['title'], 30);
     foreach ($title as $id => $line) {
         if ($id != 0) {
             $title[$id] = ' ' . $title[$id];
         }
         $title[$id] .= "\n";
     }
     // Format the dates.
     $datestamp = date('Ymd\\THis\\Z', time());
     $datestart = $event['year'] . ($event['month'] < 10 ? '0' . $event['month'] : $event['month']) . ($event['day'] < 10 ? '0' . $event['day'] : $event['day']);
     // Do we have a event that spans several days?
     if ($event['span'] > 1) {
         $dateend = strtotime($event['year'] . '-' . ($event['month'] < 10 ? '0' . $event['month'] : $event['month']) . '-' . ($event['day'] < 10 ? '0' . $event['day'] : $event['day']));
         $dateend += ($event['span'] - 1) * 86400;
         $dateend = date('Ymd', $dateend);
     }
     // This is what we will be sending later
     $filecontents = '';
     $filecontents .= 'BEGIN:VCALENDAR' . "\n";
     $filecontents .= 'METHOD:PUBLISH' . "\n";
     $filecontents .= 'PRODID:-//ElkArteCommunity//ElkArte ' . (empty($forum_version) ? 2.0 : strtr($forum_version, array('ElkArte ' => ''))) . '//EN' . "\n";
     $filecontents .= 'VERSION:2.0' . "\n";
     $filecontents .= 'BEGIN:VEVENT' . "\n";
     $filecontents .= 'ORGANIZER;CN="' . $event['realname'] . '":MAILTO:' . $webmaster_email . "\n";
     $filecontents .= 'DTSTAMP:' . $datestamp . "\n";
     $filecontents .= 'DTSTART;VALUE=DATE:' . $datestart . "\n";
     // more than one day
     if ($event['span'] > 1) {
         $filecontents .= 'DTEND;VALUE=DATE:' . $dateend . "\n";
     }
     // event has changed? advance the sequence for this UID
     if ($event['sequence'] > 0) {
         $filecontents .= 'SEQUENCE:' . $event['sequence'] . "\n";
     }
     $filecontents .= 'SUMMARY:' . implode('', $title);
     $filecontents .= 'UID:' . $event['eventid'] . '@' . str_replace(' ', '-', $mbname) . "\n";
     $filecontents .= 'END:VEVENT' . "\n";
     $filecontents .= 'END:VCALENDAR';
     // Send some standard headers.
     @ob_end_clean();
     if (!empty($modSettings['enableCompressedOutput'])) {
         ob_start('ob_gzhandler');
     } else {
         ob_start();
     }
     // Send the file headers
     header('Pragma: ');
     header('Cache-Control: no-cache');
     if (!isBrowser('gecko')) {
         header('Content-Transfer-Encoding: binary');
     }
     header('Expires: ' . gmdate('D, d M Y H:i:s', time() + 525600 * 60) . ' GMT');
     header('Last-Modified: ' . gmdate('D, d M Y H:i:s', time()) . 'GMT');
     header('Accept-Ranges: bytes');
     header('Connection: close');
     header('Content-Disposition: attachment; filename="' . $event['title'] . '.ics"');
     if (empty($modSettings['enableCompressedOutput'])) {
         header('Content-Length: ' . Util::strlen($filecontents));
     }
     // This is a calendar item!
     header('Content-Type: text/calendar');
     // Chuck out the card.
     echo $filecontents;
     // Off we pop - lovely!
     obExit(false);
 }

/**
 * Saves a PM draft in the user_drafts table
 *
 * - The core draft feature must be enabled, as well as the pm draft option
 * - Determines if this is a new or and update to an existing pm draft
 *
 * @package Drafts
 * @param mixed[] $recipientList
 */
function savePMDraft($recipientList)
{
    global $context, $user_info, $modSettings;
    // Ajax calling
    if (!isset($context['drafts_pm_save'])) {
        $context['drafts_pm_save'] = !empty($modSettings['drafts_enabled']) && !empty($modSettings['drafts_pm_enabled']) && allowedTo('pm_draft');
    }
    // PM survey says ... can you stay or must you go
    if (empty($context['drafts_pm_save']) || !isset($_POST['save_draft']) || !isset($_POST['id_pm_draft'])) {
        return false;
    }
    // Read in what was sent
    $id_pm_draft = empty($_POST['id_pm_draft']) ? 0 : (int) $_POST['id_pm_draft'];
    $draft_info = loadDraft($id_pm_draft, 1);
    $post_errors = Error_Context::context('pm', 1);
    // 5 seconds is the same limit we have for posting
    if (isset($_REQUEST['xml']) && !empty($draft_info['poster_time']) && time() < $draft_info['poster_time'] + 5) {
        // Send something back to the javascript caller
        if (!empty($id_pm_draft)) {
            loadTemplate('Xml');
            $context['sub_template'] = 'xml_draft';
            $context['id_draft'] = $id_pm_draft;
            $context['draft_saved_on'] = $draft_info['poster_time'];
            obExit();
        }
        return true;
    }
    // Determine who this is being sent to
    if (isset($_REQUEST['xml'])) {
        $recipientList['to'] = isset($_POST['recipient_to']) ? explode(',', $_POST['recipient_to']) : array();
        $recipientList['bcc'] = isset($_POST['recipient_bcc']) ? explode(',', $_POST['recipient_bcc']) : array();
    } elseif (!empty($draft_info['to_list']) && empty($recipientList)) {
        $recipientList = unserialize($draft_info['to_list']);
    }
    // Prepare the data
    $draft = array('id_pm_draft' => $id_pm_draft, 'reply_id' => empty($_POST['replied_to']) ? 0 : (int) $_POST['replied_to'], 'body' => Util::htmlspecialchars($_POST['message'], ENT_QUOTES), 'subject' => strtr(Util::htmlspecialchars($_POST['subject']), array("\r" => '', "\n" => '', "\t" => '')), 'id_member' => $user_info['id']);
    // message and subject always need a bit more work
    preparsecode($draft['body']);
    if (Util::strlen($draft['subject']) > 100) {
        $draft['subject'] = Util::substr($draft['subject'], 0, 100);
    }
    // Modifying an existing PM draft?
    if (!empty($id_pm_draft) && !empty($draft_info)) {
        modify_pm_draft($draft, $recipientList);
        // some items to return to the form
        $context['draft_saved'] = true;
        $context['id_pm_draft'] = $id_pm_draft;
    } else {
        $id_pm_draft = create_pm_draft($draft, $recipientList);
        // Everything go as expected, if not toss back an error
        if (!empty($id_pm_draft)) {
            $context['draft_saved'] = true;
            $context['id_pm_draft'] = $id_pm_draft;
        } else {
            $post_errors->addError('draft_not_saved');
        }
    }
    // if we were called from the autosave function, send something back
    if (!empty($id_pm_draft) && isset($_REQUEST['xml']) && !$post_errors->hasError('session_timeout')) {
        loadTemplate('Xml');
        $context['sub_template'] = 'xml_draft';
        $context['id_draft'] = $id_pm_draft;
        $context['draft_saved_on'] = time();
        obExit();
    }
    return;
}

 /**
  * This function handles adding, deleting and editing labels on messages.
  */
 public function action_manlabels()
 {
     global $txt, $context, $user_info, $scripturl;
     require_once SUBSDIR . '/PersonalMessage.subs.php';
     // Build the link tree elements...
     $context['linktree'][] = array('url' => $scripturl . '?action=pm;sa=manlabels', 'name' => $txt['pm_manage_labels']);
     // Some things for the template
     $context['page_title'] = $txt['pm_manage_labels'];
     $context['sub_template'] = 'labels';
     // Add all existing labels to the array to save, slashing them as necessary...
     $the_labels = array();
     foreach ($context['labels'] as $label) {
         if ($label['id'] != -1) {
             $the_labels[$label['id']] = $label['name'];
         }
     }
     // Submitting changes?
     if (isset($_POST['add']) || isset($_POST['delete']) || isset($_POST['save'])) {
         checkSession('post');
         // This will be for updating messages.
         $message_changes = array();
         $new_labels = array();
         $rule_changes = array();
         // Will most likely need this.
         loadRules();
         // Adding a new label?
         if (isset($_POST['add'])) {
             $_POST['label'] = strtr(Util::htmlspecialchars(trim($_POST['label'])), array(',' => ','));
             if (Util::strlen($_POST['label']) > 30) {
                 $_POST['label'] = Util::substr($_POST['label'], 0, 30);
             }
             if ($_POST['label'] != '') {
                 $the_labels[] = $_POST['label'];
             }
         } elseif (isset($_POST['delete'], $_POST['delete_label'])) {
             $i = 0;
             foreach ($the_labels as $id => $name) {
                 if (isset($_POST['delete_label'][$id])) {
                     unset($the_labels[$id]);
                     $message_changes[$id] = true;
                 } else {
                     $new_labels[$id] = $i++;
                 }
             }
         } elseif (isset($_POST['save']) && !empty($_POST['label_name'])) {
             $i = 0;
             foreach ($the_labels as $id => $name) {
                 if ($id == -1) {
                     continue;
                 } elseif (isset($_POST['label_name'][$id])) {
                     // Prepare the label name
                     $_POST['label_name'][$id] = trim(strtr(Util::htmlspecialchars($_POST['label_name'][$id]), array(',' => ',')));
                     // Has to fit in the database as well
                     if (Util::strlen($_POST['label_name'][$id]) > 30) {
                         $_POST['label_name'][$id] = Util::substr($_POST['label_name'][$id], 0, 30);
                     }
                     if ($_POST['label_name'][$id] != '') {
                         $the_labels[(int) $id] = $_POST['label_name'][$id];
                         $new_labels[$id] = $i++;
                     } else {
                         unset($the_labels[(int) $id]);
                         $message_changes[(int) $id] = true;
                     }
                 } else {
                     $new_labels[$id] = $i++;
                 }
             }
         }
         // Save the label status.
         updateMemberData($user_info['id'], array('message_labels' => implode(',', $the_labels)));
         // Update all the messages currently with any label changes in them!
         if (!empty($message_changes)) {
             $searchArray = array_keys($message_changes);
             if (!empty($new_labels)) {
                 for ($i = max($searchArray) + 1, $n = max(array_keys($new_labels)); $i <= $n; $i++) {
                     $searchArray[] = $i;
                 }
             }
             updateLabelsToPM($searchArray, $new_labels, $user_info['id']);
             // Now do the same the rules - check through each rule.
             foreach ($context['rules'] as $k => $rule) {
                 // Each action...
                 foreach ($rule['actions'] as $k2 => $action) {
                     if ($action['t'] != 'lab' || !in_array($action['v'], $searchArray)) {
                         continue;
                     }
                     $rule_changes[] = $rule['id'];
                     // If we're here we have a label which is either changed or gone...
                     if (isset($new_labels[$action['v']])) {
                         $context['rules'][$k]['actions'][$k2]['v'] = $new_labels[$action['v']];
                     } else {
                         unset($context['rules'][$k]['actions'][$k2]);
                     }
                 }
             }
         }
         // If we have rules to change do so now.
//.........这里部分代码省略.........

 /**
  * Breaks a string up so its no more than width characters long
  *
  * - Will break at word boundaries
  * - If no natural space is found will break mid-word
  *
  * @param string $string
  * @param int $width
  * @param string $break
  */
 private function _utf8_wordwrap($string, $width = 75, $break = "\n")
 {
     $lines = array();
     while (!empty($string)) {
         // Get the next #width characters before a break (space, tab etc)
         if (preg_match('~^(.{1,' . $width . '})(?:\\s|$)~', $string, $matches)) {
             // Add the #width to the output and set up for the next pass
             $lines[] = $matches[1];
             $string = Util::substr($string, Util::strlen($matches[0]));
         } else {
             $lines[] = Util::substr($string, 0, $width);
             $string = Util::substr($string, $width);
         }
     }
     // Join it all the shortened sections up on our break characters
     return implode($break, $lines);
 }

 /**
  * Combine files in to <200k chunks and make closure compiler requests
  *
  * What it does:
  * - Loads as many files as it can in to a single post request while
  * keeping the post size within the limits accepted by the service
  * - Will do multiple requests until done, combining the results
  * - Returns the compressed string or the original if an error occurs
  */
 private function _closure_js_code_chunks()
 {
     $fetch_data = '';
     $combine_files = array_values($this->_combine_files);
     for ($i = 0, $filecount = count($combine_files); $i < $filecount; $i++) {
         // New post request, start off empty
         $post_len = 0;
         $post_data = '';
         $post_data_raw = '';
         // Combine data in to chunks of < 200k to minimize http posts
         while ($i < $filecount) {
             // Get the details for this file
             $file = $combine_files[$i];
             // Skip over minimized ones
             if ($file['minimized'] === true) {
                 $i++;
                 continue;
             }
             // Prepare the data for posting
             $data = urlencode($file['content']);
             $data_len = Util::strlen($data);
             // While we can add data to the post and not acceed the post size allowed by the service
             if ($data_len + $post_len < 200000) {
                 $post_data .= $data;
                 $post_data_raw .= $file['content'];
                 $post_len = $data_len + $post_len;
                 $i++;
             } else {
                 $i--;
                 break;
             }
         }
         // Send it off and get the results
         $post_data = '&js_code=' . $post_data;
         $data = fetch_web_data($this->_url, $this->_post_header . $post_data);
         // Use the results or the raw data if an error is detected
         $fetch_data .= $data === false || trim($data) == '' || preg_match('/^Error\\(\\d{1,2}\\):\\s/m', $data) ? $post_data_raw : $data;
     }
     return $fetch_data;
 }

//.........这里部分代码省略.........
                while ($row = $db->fetch_assoc($request)) {
                    $context['polls'][] = array('id' => $row['id_poll'], 'topic' => array('id' => $row['id_topic'], 'subject' => $row['subject']), 'question' => $row['question'], 'selected' => $row['id_topic'] == $firstTopic);
                }
                $db->free_result($request);
            }
            if (count($boards) > 1) {
                foreach ($boards_info as $row) {
                    $context['boards'][] = array('id' => $row['id_board'], 'name' => $row['name'], 'selected' => $row['id_board'] == $topic_data[$firstTopic]['board']);
                }
            }
            $context['topics'] = $topic_data;
            foreach ($topic_data as $id => $topic) {
                $context['topics'][$id]['selected'] = $topic['id'] == $firstTopic;
            }
            $context['page_title'] = $txt['merge'];
            $context['sub_template'] = 'merge_extra_options';
            return;
        }
        // Determine target board.
        $target_board = count($boards) > 1 ? (int) $_REQUEST['board'] : $boards[0];
        if (!in_array($target_board, $boards)) {
            fatal_lang_error('no_board');
        }
        // Determine which poll will survive and which polls won't.
        $target_poll = count($polls) > 1 ? (int) $_POST['poll'] : (count($polls) == 1 ? $polls[0] : 0);
        if ($target_poll > 0 && !in_array($target_poll, $polls)) {
            fatal_lang_error('no_access', false);
        }
        $deleted_polls = empty($target_poll) ? $polls : array_diff($polls, array($target_poll));
        // Determine the subject of the newly merged topic - was a custom subject specified?
        if (empty($_POST['subject']) && isset($_POST['custom_subject']) && $_POST['custom_subject'] != '') {
            $target_subject = strtr(Util::htmltrim(Util::htmlspecialchars($_POST['custom_subject'])), array("\r" => '', "\n" => '', "\t" => ''));
            // Keep checking the length.
            if (Util::strlen($target_subject) > 100) {
                $target_subject = Util::substr($target_subject, 0, 100);
            }
            // Nothing left - odd but pick the first topics subject.
            if ($target_subject == '') {
                $target_subject = $topic_data[$firstTopic]['subject'];
            }
        } elseif (!empty($topic_data[(int) $_POST['subject']]['subject'])) {
            $target_subject = $topic_data[(int) $_POST['subject']]['subject'];
        } else {
            $target_subject = $topic_data[$firstTopic]['subject'];
        }
        // Get the first and last message and the number of messages....
        $request = $db->query('', '
			SELECT approved, MIN(id_msg) AS first_msg, MAX(id_msg) AS last_msg, COUNT(*) AS message_count
			FROM {db_prefix}messages
			WHERE id_topic IN ({array_int:topics})
			GROUP BY approved
			ORDER BY approved DESC', array('topics' => $topics));
        $topic_approved = 1;
        $first_msg = 0;
        while ($row = $db->fetch_assoc($request)) {
            // If this is approved, or is fully unapproved.
            if ($row['approved'] || !isset($first_msg)) {
                $first_msg = $row['first_msg'];
                $last_msg = $row['last_msg'];
                if ($row['approved']) {
                    $num_replies = $row['message_count'] - 1;
                    $num_unapproved = 0;
                } else {
                    $topic_approved = 0;
                    $num_replies = 0;
                    $num_unapproved = $row['message_count'];

 /**
  * Truncate a string up to a number of characters while preserving whole words and HTML tags
  *
  * This function is an adaption of the cake php function truncate in utility string.php (MIT)
  *
  * @param string $string text to truncate.
  * @param integer $length length of returned string
  * @param string $ellipsis characters to add at the end of cut string, like ...
  * @param boolean $exact If to account for the $ellipsis length in returned string length
  *
  * @return string Trimmed string.
  */
 public static function shorten_html($string, $length = 384, $ellipsis = '...', $exact = true)
 {
     // If its shorter than the maximum length, while accounting for html tags, simply return
     if (Util::strlen(preg_replace('~<.*?>~', '', $string)) <= $length) {
         return $string;
     }
     // Start off empty
     $total_length = $exact ? Util::strlen($ellipsis) : 0;
     $open_tags = array();
     $truncate = '';
     // Group all html open and closing tags, [1] full tag with <> [2] basic tag name [3] tag content
     preg_match_all('~(<\\/?([\\w+]+)[^>]*>)?([^<>]*)~', $string, $tags, PREG_SET_ORDER);
     // Walk down the stack of tags
     foreach ($tags as $tag) {
         // If this tag has content
         if (!preg_match('/img|br|input|hr|area|base|basefont|col|frame|isindex|link|meta|param/s', $tag[2])) {
             // Opening tag add the closing tag to the top of the stack
             if (preg_match('~<[\\w]+[^>]*>~s', $tag[0])) {
                 array_unshift($open_tags, $tag[2]);
             } elseif (preg_match('~<\\/([\\w]+)[^>]*>~s', $tag[0], $close_tag)) {
                 // Remove its starting tag
                 $pos = array_search($close_tag[1], $open_tags);
                 if ($pos !== false) {
                     array_splice($open_tags, $pos, 1);
                 }
             }
         }
         // Add this (opening or closing) tag to $truncate
         $truncate .= $tag[1];
         // Calculate the length of the actual tag content, accounts for html entities as a single characters
         $content_length = Util::strlen($tag[3]);
         // Have we exceeded the allowed length limit, only add in what we are allowed
         if ($content_length + $total_length > $length) {
             // The number of characters which we can still return
             $remaining = $length - $total_length;
             $truncate .= Util::substr($tag[3], 0, $remaining);
             break;
         } else {
             $truncate .= $tag[3];
             $total_length += $content_length;
         }
         // Are we there yet?
         if ($total_length >= $length) {
             break;
         }
     }
     // Our truncated string up to the last space
     $space_pos = Util::strpos($truncate, ' ', 0, true);
     $space_pos = empty($space_pos) ? $length : $space_pos;
     $truncate_check = Util::substr($truncate, 0, $space_pos);
     // Make sure this would not cause a cut in the middle of a tag
     $lastOpenTag = (int) Util::strpos($truncate_check, '<', 0, true);
     $lastCloseTag = (int) Util::strpos($truncate_check, '>', 0, true);
     if ($lastOpenTag > $lastCloseTag) {
         // Find the last full open tag in our truncated string, its what was being cut
         preg_match_all('~<[\\w]+[^>]*>~s', $truncate, $lastTagMatches);
         $last_tag = array_pop($lastTagMatches[0]);
         // Set the space to just after the last tag
         $space_pos = Util::strpos($truncate, $last_tag, 0, true) + strlen($last_tag);
         $space_pos = empty($space_pos) ? $length : $space_pos;
     }
     // Look at what we are going to cut off the end of our truncated string
     $bits = Util::substr($truncate, $space_pos);
     // Does it cut a tag off, if so we need to know so it can be added back at the cut point
     preg_match_all('~<\\/([a-z]+)>~', $bits, $dropped_tags, PREG_SET_ORDER);
     if (!empty($dropped_tags)) {
         if (!empty($open_tags)) {
             foreach ($dropped_tags as $closing_tag) {
                 if (!in_array($closing_tag[1], $open_tags)) {
                     array_unshift($open_tags, $closing_tag[1]);
                 }
             }
         } else {
             foreach ($dropped_tags as $closing_tag) {
                 $open_tags[] = $closing_tag[1];
             }
         }
     }
     // Cut it
     $truncate = Util::substr($truncate, 0, $space_pos);
     // Dot dot dot
     $truncate .= $ellipsis;
     // Finally close any html tags that were left open
     foreach ($open_tags as $tag) {
         $truncate .= '</' . $tag . '>';
     }
     return $truncate;
 }