только как этот запрос под комменты обработать
$req = mysql_query("SELECT COUNT(*) FROM `forum`
LEFT JOIN `cms_forum_rdm` ON `forum`.`id` = `cms_forum_rdm`.`topic_id` AND `cms_forum_rdm`.`user_id` = '" . core::$user_id . "'
WHERE `forum`.`type`='t'" . (core::$user_rights >= 7 ? "" : " AND `forum`.`close` != '1'") . "
AND (`cms_forum_rdm`.`topic_id` Is Null
OR `forum`.`time` > `cms_forum_rdm`.`time`)");