Set up the service requester.

设置服务请求程序。

For now, assume the requester is a PHP view page.

现在，假定请求者是一个php视图页面。

Step 4 must be performed by the service requester.

步骤4必须由服务请求程序执行。

The response template is returned to the requester.

响应模板返回给请求方。

Such logic can't be reconstructed on the requester side.

这样的业务逻辑无法在请求程序端重新建立。