php将对象转化为数组

    private function objectToArray($obj)
    {
        $_arr = is_object($obj) ? get_object_vars($obj) : $obj;
        $arr =array();
        foreach ($_arr as $key => $val) {
            $val = (is_array($val) || is_object($val)) ? $this->objectToArray($val) : $val;
            $arr[$key] = $val;
        }
        return $arr;
    }