Starting a PHP Session

Before you can store user information in your PHP session, you must first start up the session.
Note: The session_start() function must appear BEFORE the < html > tag:
< ?php session_start(); ? >

< html >
< body >

< /body >
< /html >
The code above will register the user's session with the server, allow you to start saving user information, and assign a UID for that user's session.