What are Session variables ?

Was wondering is there any DETAILED info on this site to help a person understand "session variables". Also, on a form...do I need to make a "hidden" field to input a username into the database when the form is submitted? Any information about this topic would be much appreciated!

There is lots of information throughout the web about sesison variables. WebAssist does not have a detailed tutorial dedicated to this subject.

Try a google search. I found quite a few including:
Introduction-to-Maintaining-the-State-of-Applications-with-PHP-Sessions/
and
php-session-explained-105657.html
and
733.htm

Thank you!

I use a session variable to store the username when a person logs into the site... what I'm not sure how to do is automatically set that session variable from a cookie (as in, "keep me signed in" check box at the log-in screen that would set a cookie to auto set the session variable each time a page on the site is opened...

Is there any info on how to use the Cookie Toolkit for this purpose?

I should mention that I've tried the following:

Set a cookie called "auto_log" based on the checkbox state... if checked onSubmit, the cookie "auto_log" is set to the value of the username (which is also the value used in the session variable).
There is a server-side behavior to set the session variable "MM_Username" to the value of cookie "auto_log" before page load.

I thought this might work, but it does not.

You should use the SecurityAssist product from webassist. It will create the login page with the auto login feature as well as create a forgot password functionality and the registration page and update profile page all from within one wizard.