/**

      * 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;

     }