A consistent hashing algorithm implemented in PHP

consistent-hashing.php

<?php
$cont = 0;
foreach ($servers AS $ip)
{
    for ($k = 0; $k < 40; $k++) {
        $ss = "$ip-$k";
        $digest = md5($ss, true);
        for ($h = 0; $h < 4; $h++) {
            $continuum[$cont]['point'] =
                (ord($digest[3+$h*4]) << 24 )
                    | (ord($digest[2+$h*4]) << 16 )
                    | (ord($digest[1+$h*4]) <<  8 )
                    | ord($digest[$h*4]);
            $continuum[$cont]['ip'] = $ip;
            $cont++;
        }
    }
}