public static function getInstance() { if (self::$db_singleton == null) { self::$db_singleton = new PDO("mysql:host=" . self::$dbhost . ";dbname=" . self::$dbname . ";charset=utf8", self::$dbuser, self::$dbpass, array(PDO::ATTR_EMULATE_PREPARES => false, PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION)); } return self::$db_singleton; }