PHP对象转数组

 $param = json_encode($param);
 $param = json_decode($param, true); 

function object_to_array($obj) {
    $arr = (array)$obj;
    foreach ($arr as $k => $v) {
        if (gettype($v) == 'resource') {
            return;
        }
        if (gettype($v) == 'object' || gettype($v) == 'array') {
            $arr[$k] = (array)object_to_array($v);
        }
    }
 
    return $arr;
}