Chocolate cookies
Create a web page which ask user name and save it into a cookie, next retreive it and display it with a welcome message!
http://php.net/manual/en/features.cookies.php
Try to found the cookie you save into your browser internals.
Try to redo Level 1 but now by using a PHP session instead of a cookie!
http://php.net/manual/en/session.examples.basic.php
The session create a cookie, what this one look like?