使用PHP如何在不同服务器上的脚本之间安全地传递变量

Question

I have a login form on one server, server A. Hosted on another server, server B, I have a script to check the data and return the result. Server B sends the result to server A, but I don't want to pass the result back in the URL or headers with various redirects, because people can spoof a "true/false" to change the result of the login.

eg

I can't use HTTPS/SSL as my web host does not support it for free.

Answer 1

You could set up an ssh tunnel between the servers and have the web server on B listen only on localhost:Bs_tunnel_port, while A connects to its localhost:As_tunnel_port.

Or get that SSL thing going... ;)