detect domain name used to access site?

[jhanson]

I'm not sure if this is the proper forum for this. If not, I apologize.

If I have two domain names, jhanson.org and jhanson.com, and they both point to the same location, is there any way to detect which one the user used to access the page?

[jason]

Yes, you can look at the HTTP_HOST environment variable.

If you use PHP, both of these lines will show you:

<?
    echo($_ENV["HTTP_HOST"]);
    echo($HTTP_HOST);
?>

--Jason