public static function getInstance()
{
if (!self::$_instance) {
self::$_instance = new self();
}
return self::$_instance;
}
public function __invoke() { $function = $this->_object; $arguments = func_get_args(); return Db::getInstance()->runInTransaction(function () use($function, $arguments) { return call_user_func_array($function, $arguments); }); }