PHP Gurus, Please Help with my script.

Hi. I have made a simple PHP script to check for banned IPs and redirect the banned ones to a certain URL, then redirect the other non banned IPs to a different URL. What I am now trying to do is make the script be able to randomly redirect the non banned ones to one of 5 or so URLs that I have.

For example. I have a number of different affiliate offers for a free credit report and I want to send each non banned IPs to a randomly chosen URL so each affiliate offer will get some traffic and hopefully some sales.

Below is the code I have already written. If someone could help show me how to make it do the random URL thing, I would appreciate it.

<?php 
$banned_ip = array(); 
$banned_ip[] = '204.96.148.3'; 
$banned_ip[] = '205.162.217.141'; 
foreach($banned_ip as $banned) 
{  
    $ip = $_SERVER['REMOTE_ADDR']; 
    if($ip == $banned)
    {  
        header("location: http://you-are-banned.com"); 
        die();//abort the script on redirect. just in case.
    }
}  
//if we got this far, their IP is obviously not banned
//this is where I would like it to have numerous URLs to randomly send each visitor to one of them
header("location: http://www.freecreditreport1.com"); 
?>

Code (markup):

 

// after checking banned domains
$urls = array();
$urls[0] = "http://www...."; //url goes here
$urls[1] = "...."; // url goes here
...

$total = count($urls);
$url = $urls[rand($total-1)];
header("Location: ".$url);

PHP:

 

do it in the same way with an array
add this at the final
$affiliates = array("url1", "url2", "etc");
$max = sizeof($affiliates);
$random = rand(0, $max);
header("location: $affiliates[$random]");