outside referrer redirect

[zzz]

I have a few pages that set cookie with page ID. I need to be able to load appropriate page for users that have this page cookie. I only want to do it for users that arrive to my site from elsewhere, i.e. referrer is not some page under my domain.

What's the best way to do this?

Shall I check and if cookie exists do META tag redirect to that page?

if ($_COOKIE["pageID"] != '' && ???REFERRER ....) {
   echo '
   <META 
   http-equiv="refresh" content="0;
   URL=http://www.mydomain.com/pageID= '.$_COOKIE["pageID"] .'">';
}

Something similar to how Craigslist.com opens their locations.

[ixalmida]

I'm assuming the conventional $_SERVER['HTTP_REFERRER'] won't work for you or you could just grab the domain.

Another thought is to check the referring link. This would work only if you are using relative links in your own site and all of your referring pages are limited to a particular folder. In my site, for example, all of the links for any admin function is the function name itself. Anything else would be from outside my site.

Example:

if($_COOKIE["pageID"] != '' && $_SERVER['REQUEST_URI'] != "thispage.php")

[zzz]

Yes, I tried $_SERVER['HTTP_REFERRER'] but I get it only from internal links for some strange reason. I tried to google for my domain name and then click on the link from google results but when I got to the page where I echoed referrer I could not see it. However when I clicked through from another page of mine I could get the referrer value...