PHP Referrer & Display Help

[A.J. Angel]

Hello,

I am currently using the following code below to display two different codes depending on referrers. It came to my attention that if the page is visited from a direct url or a bookmark for example, the include is not working. It only works if the page is visited from "somewhere".

As such, I wish to ask if someone may be able to "fix" the code. Basically, I wish to display the first code if the visitor comes from domain.com otherwise, the include is displayed no matter where else they come from. Thank you in advance.

PHP Code:

      if(isset($_SERVER['HTTP_REFERER'])) {
          $referrer = $_SERVER['HTTP_REFERER'];
          if(stristr($referrer, 'domain.com')) {
               echo '<INSERT CODE>';
          } else {
               include $_SERVER['DOCUMENT_ROOT'].("/path/to/file.html");
          }
     }