http_referrer in php 4.4

[davelr45]

I cant seem to get the http_referer variable to work in my scripts and I thinks its because

I'm using php 4.4, I am trying to determine if a page is being accessed from PayPal and I need it to tell me if thats where they were referred from (selling on-demand video through PayPal) so I can set a variable to expire after 24 hours and has to work around returning to that page from a bookmark or link.

 

Is there a way to find out where the user was referred from using something different from http_referrer or can it be done in php 4.4???