how do you pass session variables?

Quick question... I'm working on a site and I can't use cookies so I was wondering how do I pass session variables from page to page without them? For example, I have one page that has $counter and I want that value to be pass to each page and count how many pages a user goes to before leaving. Are there several ways of doing this whitout cookies, without cramming the URL full of stuff, without using a database, or a flat file? I know that in the php.ini I have the session.save_handler = files so that php will produce it's own file per session but I thought the session variables where stored in this file when you run session_register(). Below is what I have tried. I have tried this: First page: session_start(); $count = isset($count) ? $count + 1 : 0; session_register("count"); Second page: session_start(); session_register("count"); $count = $count + 1; Third page same as second etc... Thanks for any help! Jay Paulson