How would i reverse this system so i get the original IP?

PHP Code:

<?php
//original ip without modifications
$ip = "192.168.1.1";

echo sprintf ('%u', ip2long ($ip));

?>

This script produces the numbers: 3232235777

Well, just use long2ip().

PHP Code:

<?php
//original ip without modifications
$ip = "192.168.1.1";
$longIp=ip2long ($ip);
echo long2ip($longIp); //should output 192.168.1.1
?>