Website A has a link pointing to Website C

Website B has the same link pointing to Website C



I want to redirect those visitors coming to Website C (my website) who come VIA Website A on to Website D

BUT NOT visitors who come VIA Website B (or any other source really).


Is there a PHP function that would help out here?

You can use $_SERVER['HTTP_REFERRER'] to determine where the user is coming from. There is no guarantee however, that the referrer will be set. I wouldn't rely on it for anything important.

PHP redirection.Have a look at this tips

You could use $_SERVER['HTTP_REFERRER'], but as nullPointer mentioned above, you can't rely on it for something important. Another thing you could do might be to add an interfacing page that has a token. So, point site A to interfacing page (with token) and use that token to determine that they came from site A.

Not sure if that makes any sense

I have used $_SERVER['HTTP_REFERRER'], it works not well, sometime it has a wrong value. or null.

There is not option for redirect in PHP , you have to use header function for this

This can be done relatively easily from the .htaccess file

Originally Posted by dagaul101

This can be done relatively easily from the .htaccess file

Care to elaborate.....?

Originally Posted by TWD

Care to elaborate.....?

Create a file names ".htaccess" in the root directory and add RewriteCond and RewriteRules. Do a search for .htaccess rewrite conditions for full info.I'd recommend that you try this in a lower level directory first!

I'm well aware of using 301 redirects.
But I'm not convinced that .htaccess files can determine the origin of incoming
links. And even if they could, how to set up conditional logic on a page by page basis.

.htaccess (ie mod_rewrite) allows multiple rewrite conditions to rules, and you can combine check on HTTP_REFERRER with check on REQUEST_URI See http://corz.org/serv/tricks/htaccess2.php for a very comprehensive set of examples.