Pass values through a PHP form emailer

This may be an obvious simple problem, but not to me, a student of PHP.

I have a very basic PHP script that emails forms submitted to it.
It has a success page/URL feature.
I'd like to learn how to modify this script to pass certain vales onto the
success page.

I've passed values between web pages before using JavaScript methods like:
http://javascript.internet.com/forms/passing-values.html

So the URL to my destination page may be in this format:
http://www.test.com/passing-values-source2.htm?firstname=Amanda&lastname=Wilson&age=77

any suggestions?


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