if($act != 'guest')
$sql = 'AND `sex` = ' . ($act == 'male' ? 'm' : 'f')
$req = mysql_query("SELECT * FROM `" . ($act == 'guest' ? 'cms_guests' : 'users') . "` WHERE `lastdate` > '$onltime' $sql ORDER BY " . ($act == 'guest' ? "`movings` DESC" : "`name` ASC") . " LIMIT $start,$kmess");как-то так