Domain + directory = access granted?

[tgavin]

I'm trying to set up a security script that will only allow another script to be run from a specified domain/directory - and any sub directory.

script can NOT run from mydomain.com
script CAN run from mydomain.com/my_directory
script CAN run from mydomain.com/my_directory/sub_directory

So far I have checking for the domain, but can't figure out how to include directories

$domain = "www.mydomain.com";
$directory = "/my_dir";
rootPath = "/home/site/public_html";
sitePath = $rootPath.$directory

// let's do some security
$server = $_SERVER["SERVER_NAME"];

// check if the user is authorized
if($server != $domain) {
****
****// not authorized
****echo "ERROR! You are not authorized to run this program on the domain $server";
****exit();
}
else {
$siteURL = "http://".$domain.$directory;
} 

Any suggestions would be greatly appreciated!

[phpster]

have a look at $_SERVER['REQUEST_URI']...it may be what you are looking for

[tgavin]

have a look at $_SERVER['REQUEST_URI']...it may be what you are looking for

Thanks for the reply. I think I got it, although it seemed too easy

Anybody, if there is a hole, please point it out to me.
Remember, this is supposed to allow from www.mydomain.com/my_dir/ downward into as many directories deep as the user wants to go.

$domain = "www.mydomain.com";
$directory = "/my_dir";
rootPath = "/home/site/public_html";
$site = $domain.$directory;
sitePath = $rootPath.$directory;

// let's do some security
$server = $_SERVER["SERVER_NAME"].$directory;

// check if the user is authorized
if($server != $site) {

   // not authorized
   echo "ERROR! You are not authorized to run this program on the domain $server";
   exit();
}
else {
$siteURL = "http://".$domain.$directory;
} 

Thanks!