if URL = "Entire Directory"?

I'm sort of new to PHP; here's my question:
Is there a way I can say "if $variable == "entiredir.."?

Here's a small piece of my code to better explain:

<?php $theuri = $_SERVER['REQUEST_URI'];
	if ( ($theuri =="/gr/gamecube..") or ($theuri =="/gr/gc.php") ) {
	$itemis = "gc"; }

	else {
	$itemis = ""; }

?>

PHP:

Notice the part that says "/gr/gamecube..". I want this to mean that ALL files beyond this URL will apply the same function. So, pages with /gr/gamecube/weee.php, /gr/gamecube/beyond/yay.php, gr/gamecube/beyond/beyond/ooo.php would ALL apply the same function.

Is this possible with PHP, and if so, how? It'd be much more convienant than listing every single page...

 

This should work:

<?php 

	$theuri = $_SERVER['REQUEST_URI'];

	if ( eregi('/gr/gamecube', $theuri) || eregi('/gr/gc.php', $theuri))
		$itemis = "gc"; 

	else
		$itemis = "";

?>

PHP:

-the mole

 

Thanks a lot! Works perfectly