[Brainmaster]

PHP Code:

$referers = array ('www.yourforums.com','yourforums.com','aaa.bbb.ccc.ddd'); 

function check_referer($referers){ 
   if (count($referers)){ 
      $found = false; 
      $temp = explode('/',getenv("HTTP_REFERER")); 
      $referer = $temp[2]; 
      for ($x=0; $x < count($referers); $x++){ 
         if (ereg ($referers[$x], $referer)) { 
            $found = true; 
         } 
      } 
      if (!$found){ 
      exit;
      } 
         return $found; 
      } else { 
         return true;
   } 
} 

check_referer($referers); 


In what kind of file must I add this code?