link / session var howto question?

[Anon]

How do I pass a session var when a link is clicked?

Ie:

<A HREF="<?echo $PHP_SELF."?mainmodule=register"?>">Register</A>

but register is a session var?

is there a function or a way to do:
Psuedo code

on click of link {
$mainmodule=register;
}

if I pass register in the URL I get stuck with register in the URL and I cannot figureout how to remove it from the URL header.

[juxstapose]

Hi,

If you are traversing through your site with links the session variable will remain on any page. It exists until session_unregistrar('your_var') is called or your session is destroyed.

This is one of the advantages of session variables so you do not have to pass it through the url.

-Mike