/**
* 对象转化为数组
* @param object $obj 对象
* @return array 数组
*/
function object_to_array($obj){
$_arr = is_object($obj) ? get_object_vars($obj) :$obj;
foreach ($_arr as $key=>$val){
$val = (is_array($val) || is_object($val)) ? object_to_array($val):$val;
$arr[$key] = $val;
}
return $arr;
}