Simple encryption in PHP

Question

I\'m building a with-source system which I am giving out on the \'net for providing adoptable virtual pets. The system will be owned mainly by kids. Since I want it to be us

Answer 1

Why not just give each user a long, random ID and then store all the details about their pet on the server? Best practice is not to store anything in the URL, encrypted or not. All you should need is a session ID.