php 写下和读取序列化的cookie

php 写入和读取序列化的cookie
  

      public  function saveConfigToCookie(array    $config){         setcookie("c", urlencode(serialize(($config))), time() + 9999999, "/");    }

      public  function loadCookieConfig() {         $configCookieVal = $_COOKIE['c'];         $configArray = unserialize(urldecode($configCookieVal));         return $configArray;    }