Dedirect to refferer page

I'm looking for a way to redirect a user to the page they previously came from when they select a link. So far I haven't turned up much in what I'm looking for, only redirecting based upon if they came from a specific domain. Can anyone help me out?

 

something like this:

<?php if($_SERVER['HTTP_REFERER']) echo "<a href='{$_SERVER['HTTP_REFERER']}'>Go back</a>"; ?>

Code (markup):

 

Thanks, I'll give it a shot and let you know how it goes.