session_id simple question

[redbrad0]

I have never had the need to use the users session id, but now I am in need and I know this will be a quick and basic question.

 

If I write the session_id onto the webpage, the number changes all the time (when cookies are disabled). Shouldn't this number always stay the same?

 

echo session_id();

[GingerRobot]

The user must provide the session ID. There is no way for the server to track the user. Normally, the session ID is set in a cookie. If you're really against this, you can set PHP to pass the ID around in the URL or in hidden fields. This is not without its own set of problems, however.