Here is my codes. I am working on buy. And I completed most of the functions. When I go to webServer to test it. I got a fatal error.(because I am debugging the code, so I commented all the core code.) As you can see, I can get the buy page correctly. But when I post the request, I got this.(It directly logout.) It's very strange. I don't know why. And I can't see '666666' in my command console. I think it means that the programme doesn't go into "POST" set. I want to know how to solve that. Thanks!