static function getInstance() { if (!isset(self::$instance)) { $c = __CLASS__; self::$instance = new $c(); } return self::$instance; }
public static function getInstance($key = null, $secret = null, $sessionID = null, $country = null) { if (!isset(self::$instance)) { $c = __CLASS__; self::$instance = new $c($key, $secret, $sessionID, $country); } return self::$instance; }