public static function getInstance($servidor = 'localhost', $usuario = 'root', $clave = 'tecnicoweb', $bd = 'pface') { if (is_null(self::$_singleton)) { self::$_singleton = new DataBase($servidor, $usuario, $clave, $bd); } return self::$_singleton; }
public static function getInstance() { // doesn't exists? create a new one if (is_null(self::$_singleton)) { self::$_singleton = new DataBase(); } // return instance return self::$_singleton; }
public static function getInstance($db_name) { if (is_null(self::$_singleton)) { self::$_singleton = new DataBase($db_name); } return self::$_singleton; }