// at showthread.php, add dynamic keywords from first post
    if ($mybb->settings['cur_file'] == 'showthread.php' && MAX_DESCRIPTION_LEN > 0)
    {$degisken=0;
        // get first post
        $query = $db->query("SELECT subject FROM ".TABLE_PREFIX."posts WHERE tid = '{$mybb->input[tid]}' ORDER BY pid ASC LIMIT 1");
        $row = $db->fetch_array($query);
        if ($row['subject'] != "" && $degisken!=1) {
            $baslik = seo_clean_baslik($row['subject']);
            $baslik2="$baslik"; 
            $anahtarlar="$baslik"; 
            $virgulluanahtar=str_replace(' ',', ',trim($anahtarlar)); 
            $istediginanahtarlar=$baslik2.", ".$virgulluanahtar; 
            $meta_tag = "\r\n" . '<meta name="keywords" content="'. $istediginanahtarlar .'" />' . "\r\n";
            $page = preg_replace('#<meta(.+?) />#', "\\0{$meta_tag}", $page);$degisken=1;
        }
    }