mynameismud

Hi all, been lurking for a while and tried some coding with limited success. I'm looking to write some code that will display content (from an XML source) depending on whats in the URL/Address Bar. An example of this could be [a href=\"http://www.asite.com/fetch.php?=cars\" target=\"_blank\"]http://www.asite.com/fetch.php?=cars[/a] Does this make any sense? Basically a searchbox on another page would send the user to a page with the url above, the page shown would pull XML source according to the bit following the '?' Can anyone help, i've set up a phpBB board, but this is way beyond me. :(