public static function delete($filename, $type)
{
//获取ACCESS_TOKEN
$accessToken = AccessToken::getAccessToken();
$queryUrl = 'https://api.weixin.qq.com/cgi-bin/material/del_material?access_token=' . $accessToken;
$data = array();
$data['media'] = Curl::addFile($filename);
return Curl::callWebServer($queryUrl, $data, 'POST', 1, 0);
}