static function getInstance($set, $mtg) { if (self::$inst == null) { self::$inst = new headers($set, $mtg); } return self::$inst; }
static function getInstance($db, $set, $my, $mtg, $users) { if (self::$inst == null) { self::$inst = new headers($db, $set, $my, $mtg, $users); } return self::$inst; }