Thinkphp3.2.3加载外部类并调用类里面的方法 获取token

例如：加载七牛上传类（thinkphp自带的）

$qiniu = new ThinkUploadDriverQiniuQiniuStorage($setting['driverConfig']);
 
echo $qiniu->UploadToken($setting['driverConfig']['secretKey'],$setting['driverConfig']['accessKey']);