[GET] Script For Searching For Aged PR Domains

<?php

define('GMAG', 0xE6359A60);

function nooverflow($a)
{
    while ($a < -2147483648) {
        $a += 2147483648 + 2147483648;
    }

    while ($a > 2147483647) {
        $a -= 2147483648 + 2147483648;
    }

    return $a;
}

function zeroFill($x, $bits)
{
    if ($bits == 0) {
       return $x;
    }

    if ($bits == 32) {
        return 0;
    }

    $y = ($x & 0x7FFFFFFF) >> $bits;

    if (0x80000000 & $x) {
       $y |= (1 << (31 - $bits));
    }

    return $y;
}

function mix($a, $b, $c)
{
    $a = (int) $a;
    $b = (int) $b;
    $c = (int) $c;

    $a -= $b; $a -= $c; $a = nooverflow($a); $a ^= (zeroFill($c, 13));
    $b -= $c; $b -= $a; $b = nooverflow($b); $b ^= ($a << 8);
    $c -= $a; $c -= $b; $c = nooverflow($c); $c ^= (zeroFill($b, 13));
    $a -= $b; $a -= $c; $a = nooverflow($a); $a ^= (zeroFill($c, 12));
    $b -= $c; $b -= $a; $b = nooverflow($b); $b ^= ($a << 16);
    $c -= $a; $c -= $b; $c = nooverflow($c); $c ^= (zeroFill($b, 5));
    $a -= $b; $a -= $c; $a = nooverflow($a); $a ^= (zeroFill($c, 3));
    $b -= $c; $b -= $a; $b = nooverflow($b); $b ^= ($a << 10);
    $c -= $a; $c -= $b; $c = nooverflow($c); $c ^= (zeroFill($b, 15));

    return array($a, $b, $c);
}

function GCH($url, $length = null, $init = GMAG)
{
    if (is_null($length)) {
        $length = sizeof($url);
    }

    $a = $b = 0x9E3779B9;
    $c = $init;
    $k = 0;
    $len = $length;

    while ($len >= 12) {
        $a += ($url[$k + 0] + ($url[$k + 1] << 8) + ($url[$k + 2] << 16) + ($url[$k + 3] << 24));
        $b += ($url[$k + 4] + ($url[$k + 5] << 8) + ($url[$k + 6] << 16) + ($url[$k + 7] << 24));
        $c += ($url[$k + 8] + ($url[$k + 9] << 8) + ($url[$k + 10] << 16) + ($url[$k + 11] << 24));
        $mix = mix($a, $b, $c);
        $a = $mix[0]; $b = $mix[1]; $c = $mix[2];
        $k += 12;
        $len -= 12;
    }

    $c += $length;

    switch ($len) {
        case 11: $c += ($url[$k + 10] << 24);
        case 10: $c += ($url[$k + 9] << 16);
        case 9 : $c += ($url[$k + 8] << 8);
        case 8 : $b += ($url[$k + 7] << 24);
        case 7 : $b += ($url[$k + 6] << 16);
        case 6 : $b += ($url[$k + 5] << 8);
        case 5 : $b += ($url[$k + 4]);
        case 4 : $a += ($url[$k + 3] << 24);
        case 3 : $a += ($url[$k + 2] << 16);
        case 2 : $a += ($url[$k + 1] << 8);
        case 1 : $a += ($url[$k + 0]);
    }

    $mix = mix($a, $b, $c);

    return $mix[2];
}

function strord($string)
{
    $result = null;

    for ($i = 0; $i < strlen($string); $i++) {
        $result[$i] = ord($string{$i});
    }

    return $result;
}

function getPageRank($aUrl)
{
    $url = 'info:'.$aUrl;
    $ch = GCH(strord($url));
    $url = 'info:'.urlencode($aUrl);

    $pr_str = fetch("http://www.google.com/search?client=navclient-auto&ch=6$ch&ie=UTF-8&oe=UTF-8&features=Rank&q=$url");

    return substr($pr_str, strrpos($pr_str, ':') + 1);
}

function fetch($url)
{
    $response = false;

    $curlHandler = curl_init($url);

    curl_setopt($curlHandler, CURLOPT_RETURNTRANSFER, 1);
    $response = curl_exec($curlHandler);
    curl_close($curlHandler);

    return $response;
}

set_time_limit(0);

if ($xml = simplexml_load_file('http://www.name.com/rss/expired_domains.xml.php', 'SimpleXMLElement', LIBXML_NOCDATA)) {

    echo '<table border="1" cellpadding="2" cellspacing="0" align="center">'."\n";
    echo '<tr>
    <th>Domain</th>
    <th>PR</th>
    <th>Expired</th>
    <th>Current price</th>
    <th>Buy link</th>
</tr>'."\n";

    foreach ($xml->xpath('/rss/channel/item') as $item) {
        if (!empty($item->title)) {
            $domain = $item->title;
            $pr = trim(getPageRank($domain));

            if (!empty($pr)) {
                $expireGMTTime = strtotime($item->pubDate);
                $nowGMTTime = gmdate('U', time());

                $daysLeft = ($expireGMTTime - $nowGMTTime) / 86400;

                $price = ((4 <= $daysLeft) ? 29.95 : ((3 <= $daysLeft) ? 24.95 : ((2 <= $daysLeft) ? 19.95 : 9.95)));

                echo "<tr>
    <td>$domain</td>
    <td>$pr</td>
    <td>{$item->pubDate}</td>
    <td>\$$price</td>
    <td><a href=\"{$item->link}\" target=\"_blank\">Buy now</a></td>
</tr>\n";
                flush();
            }
        }
    }

    echo '</table>';
}