/**
* 对象转关联数组
* @author
* @param object $obj
* @return array
*/
function object_to_array($obj){
$_arr = is_object($obj) ? get_object_vars($obj) : $obj;
foreach ($_arr as $key => $val){
$val = (is_array($val) || is_object($val)) ? $this->object_to_array($val) : $val;
$arr[$key] = $val;
}
return $arr;
}