How I can get HTTP_REFERER in PHP4?

Anon

I would like to know how I can get HTTP_REFERER in PHP4. In PHP3 it was stored in $HTTP_REFERER. But it seems different in PHP4.
Thanks for your help in advance!

Anon

Thanks for your comment.
I checked phpinfo to see if I could see HTTP_REFERER. I didn't see it. This server has PHP Version 4.0.4.
I tested in another server. This PHP Version 4.0.3pl1. There I found both HTTP_REFERER and HTTP_SERVER_VARS["HTTP_REFERER"].
Both PHP are comiled similar options.
Is there anything I have to change my httpd.conf or php.ini?

Anon

Did you try getenv("HTTP_REFERER") ?

Anon

Thanks! Finally it worked!
I still don't know why HTTP_SERVER_VARS["HTTP_REFERER"] didn't work on this server.
But I am happy this is working now. And I appreicate for your help.