here.php

<?php
print "What is your private key?: ";
$input = fopen ("php://stdin","r");
$key = trim(fgets($input));
print "What part are we doing? (1 or 2): ";
$input = fopen ("php://stdin","r");
$part = trim(fgets($input));
$i = 1;
while(true){
        $hash = md5($key.$i);
        $truncatedHash = substr($hash, 0, ($part == 1 ? -27 : -26));

        if(str_replace(($part == 1 ? 00000 : 000000), "", $truncatedHash) == "")
                die(print "Found: ".$i."\n");

        $i++;
}