PHP中把stdClass Object转array的几个方法

//PHP stdClass Object转array 
function object_array($array) { 
    if(is_object($array)) { 
        $array = (array)$array; 
     } if(is_array($array)) { 
         foreach($array as $key=>$value) { 
             $array[$key] = object_array($value); 
             } 
     } 
     return $array; 
}

$array = json_decode(json_encode(simplexml_load_string($xmlString)),TRUE);

 function object2array_pre(&$object) {
        if (is_object($object)) {
            $arr = (array)($object);
        } else {
            $arr = &$object;
        }
        if (is_array($arr)) {
            foreach($arr as $varName => $varValue){
                $arr[$varName] = $this->object2array($varValue);
            }
        }
        return $arr;
    }

function object2array(&$object) {
             $object =  json_decode( json_encode( $object),true);
             return  $object;
    }