Print variables coming from a form not controled by me...

Any idea of how to get information from a form (not a form controlled by me, through GET method, i.e. info coming with the URL, like this http://www.xxx.com/xxx.cgi?result=1&age=23&name=john) and print it through php v.3? I don't know how to get the info (coming from an outside form) and pass it throught the php3 variables...... Thanks, marc