Posted by Dave on 06/13/05 17:33

Good Man (heyho@letsgo.com) decided we needed to hear...
<snip>
> My question is: is $_SERVER['HTTP_REFERRER'] reliable? Essentially, a
> place my clients have advertised with have said '80 people clicked your ad
> this month' while our own stats show that only 15 people clicked it.
>
> Is my method of tracking good/reliable enough to call them liars, or is my
> method not too dependable?

Not really a PHP question, but anyways no, HTTP_REFERRER is not that
reliable. It *should* be filled in, but e.g. some ISP caches (such as
AOLs) block it and some personal firewalls (Norton is one IIRC) also
block it - you can configure Norton to send it to certain sites but
its off by default.
--
Dave <dave@REMOVEbundook.com>
(Remove REMOVE for email address)

[Back to original message]