detecting the domain in the address bar

[barrax]

ive been trying to detect whether or not someone is viewing my php page from the correct domain (i.e. not within someone elses frameset) so i tried:

<?php
$myurl = $HTTP_SERVER_VARS['HTTP_REFERER']; 
echo "myurl=$myurl";
?>

but its not echoing any result for myurl.
This worked when i tried it on apache/win2k/php4 machine at work but not on my remote apache/linux/php4 server🙁

Can anyone help me plz?

[jonathen]

Check this out: http://www.faqts.com/knowledge_base/view.phtml/aid/31

[mogster]

The http referer is an unstable companion to rely on.

Often it is empty, because it is only filled if you click on a link, not if you type the url directly in the browser/go by bookmark.

In addition, there is an option in most browsers to turn the referral off altogether, as a matter of protecting privacy.

Too many unknown constants, I'm afraid.
I tried to make the referer a part of authentication once. Result?
A lot of complaints 😃

knutm :-)