Track referrals in PHP

[hurricane_sh]

I use the following code to track referral, it works well when user access a PHP page.
<?php
$referrer = $HTTP_COOKIE_VARS["referrer"];
if( $referrer == "")
{
$referrer = $HTTP_REFERER . date("Y-m-d");;
setcookie("referrer",$referrer, time()+60*60*24*365);
}
?>

When user downloads a file directly, I redirect the file to a php file and try to write the referral information, but get nothing, how can I track the referral for this case? Thanks!

[niceguyeddie]

The redirect causes the referrer to be internal, thus you won't get what you are looking for. You could throw a get onto your redirect code and then pass it to your new page, but it might be easier to watch your server logs

[hurricane_sh]

Originally Posted by niceguyeddie

The redirect causes the referrer to be internal, thus you won't get what you are looking for. You could throw a get onto your redirect code and then pass it to your new page, but it might be easier to watch your server logs

Thanks for your reply, I did the redirecting with htaccess like :
Redirect permanent VocabolySetup.exe http://www.vocaboly.com/download/dow...abolySetup.exe

How can I pass the referral to downfile.php?