root/redir.php

<?php</span>
<span class="code-lang">$root_path = './';
require($root_path . 'include/config.php');
$userdata = session_pagestart($user_ip);
init_userprefs($userdata);

$url = '';</span>
<span class="code-lang">
foreach( $_GET AS $var => $val ) {
    $url .= "&$var=$val";
}

$i = strpos($url, "&url=");</span>
<span class="code-lang">
if ( $i !== false ) {
    $url = substr($url, $i + 5);
}

if (substr($url, 0, 4) == "www.") {
    $url = "http://" . $url;
}

if ( strpos($url, '?') !== false ) {
    $args = explode('?', $url);
    $_url = $args[0] . '?';
    unset($args[0]);

    if ( strpos($url, '&') !== false ) {
        $args = explode('&',$args[1]);
    }

    $new_args = '';

    foreach ( $args AS $_null => $arg ) {
        list($key, $val) = explode('=',$arg);

        $new_args .= ( $new_args ? '&' : '' ) . $key . '=' . urlencode($val);
    }

    $url = $_url . $new_args;
}

if (strstr(urldecode($url), "\n") || strstr(urldecode($url), "\r")) {
    trigger_error('Tried to redirect to potentially insecure url.');
}
header ("Location: " . $url);
?>