HTTP_REFERER will only tell me the originating site of the click. e.g.
if there is a link www.notmysite1.com/click.php on a website www.notmysite2.com that when clicked 302 redirects through www.notmysite3.com/click302.php to get to me (www.mysite.com)
then how do I find out the web address of www.notmysite3.com? Right now, http_referer only tells me www.notmysite2.com
If there is a 302 redirect inbetween a click and my site, how do I recognise it?