Trying to get user IP, referrer data in PHP- Why doesn't this code work?

Question

The following code:

<?php
    // Get referrer:
    $ref=@$HTTP_REFERER; 
    echo "<b>Referrer of this page  = $ref </b><br>";

    // Get IP:
    $ip=@$REMOTE_ADDR; 
    echo "<b>IP Address= $ip</b><br>";
?>

Returns:

Referrer of this page =
IP Address=

Why wouldn't this work? Thanks-

Answer 1

$HTTP_REFERER and $REMOTE_ADDR are not defined because register_globals is turned off.

Use $_SERVER['HTTP_REFERER'] and $_SERVER['REMOTE_ADDR'] instead. Do not turn on register_globals.

Answer 2

Try using:

$_SERVER['HTTP_REFERER']

And

$_SERVER['REMOTE_ADDR']