Demo:
http://blogtai.tk/odau.php
if (isset($_SERVER['HTTP_REFERER']) && $ref=@parse_url($_SERVER['HTTP_REFERER'])){
if (isset($ref['host']))$_SESSION['http_referer']=$ref['host'];}
//tuoitreit.vn forum wapmaster
if($_SESSION['http_referer']){
echo'<b> Link</b> ...
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