Need a PHP Script written for split testing landing pages

Hello. I need a script written. Basically I sent a person to index.php, and I want someone to be sent to either landing page 1, or landing page 2. I'm already using the code below, however it does this randomly.

<?php
if(rand(0,1) == 0) {
header("Location: http://www.example.com/split1");
} else {
header("Location: http://www.example.com/split2");
}
?>

I want a script where people are sent to different pages EVENLY, not randomly.

Visitor 1 goes to page 1
Visitor 2 goes to page 2
Visitor 3 goes to page 1
Visitor 4 goes to page 2

It should be very easy for me to implement. I pay by paypal, please PM if you can do it, how long it'll take, and $.

Thanks!

 

Hi

I can do this for you PM me how much you will pay and i can start on it now.

 

I can do this for $10 in one hour

 

thanks guys, this job's closed now