I tried to run a script that redirects the user based on referrer url in PHP and Javascript, and neither work. Here is my code:

url = "*****URL*****";
if (document.referrer = url) { }
else {window.location = "*****OTHERURL*****"}

PHP:

$referrer = $_SERVER['HTTP_REFERER'];
$referrer = strtolower($referrer);
$referrer = explode ("/", $referrer);
$referrer = $referrer[2];

$targetref = "*****URL*****";
if ($referrer = $targetref) {
} else {
header( 'Location: *****OTHERURL*****' ) ;
}


I debugged it and i am sure it's right. Do i have to enable something in cpanel?