Hashing algoriths for Page Rank

pagerank.php

<?php
// Function d checks
function d($a, $b) {
        //$c = intval(8E7, 16);//80000000
        $c = 2147483648;
        $a = $a & 0xffffffff;
        if ($c & $a) {
                $a >>= 1;
                $a &= ~$c;
                $a = $a | 1073741824;
                $a >>= $b - 1;
        }
        else  $a >>= $b;
        return $a;
}

// function g checks
function g($a, $b, $c) {
        $a -= $b;
        $a -= $c;
        $a ^= d($c, 13);
        $b -= $c;
        $b -= $a;
        $b ^= $a << 8;
        $c -= $a;
        $c -= $b;
        $c ^= d($b, 13);
        $a -= $b;
        $a -= $c;
        $a ^= d($c, 12);
        $b -= $c;
        $b -= $a;
        $b ^= $a << 16;
        $c -= $a;
        $c -= $b;
        $c ^= d($b, 5);
        $a -= $b;
        $a -= $c;
        $a ^= d($c, 3);
        $b -= $c;
        $b -= $a;
        $b ^= $a << 10;
        $c -= $a;
        $c -= $b;
        $c ^= d($b, 15);

        $a = $a & 0xffffffff;
        $b = $b & 0xffffffff;
        $c = $c & 0xffffffff;

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

function a($a) {
        $length = count($a);
        $b = 2654435769;
        $c = 2654435769;
        $d = 3862272608;
        $e = 0;
        $h = array();
        for ($f = $length; $f >= 12;) {
                $b += $a[$e + 0] + ($a[$e + 1] << 8) + ($a[$e + 2] << 16) + ($a[$e + 3] << 24);
                $c += $a[$e + 4] + ($a[$e + 5] << 8) + ($a[$e + 6] << 16) + ($a[$e + 7] << 24);
                $d += $a[$e + 8] + ($a[$e + 9] << 8) + ($a[$e + 10] << 16) + ($a[$e + 11] << 24);
                $h = g($b, $c, $d);
                $b = $h[0];
                $c = $h[1];
                $d = $h[2];
                $e += 12;
                $f -= 12;
        }
        $d += $length;
        switch ($f) {
                case 11:
                    $d += $a[$e + 10] << 24;
                case 10:
                    $d += $a[$e + 9] << 16;
                case 9:
                    $d += $a[$e + 8] << 8;
                case 8:
                    $c += $a[$e + 7] << 24;
                case 7:
                    $c += $a[$e + 6] << 16;
                case 6:
                    $c += $a[$e + 5] << 8;
                case 5:
                    $c += $a[$e + 4];
                case 4:
                    $b += $a[$e + 3] << 24;
                case 3:
                    $b += $a[$e + 2] << 16;
                case 2:
                    $b += $a[$e + 1] << 8;
                case 1:
                    $b += $a[$e];
        }
        $h = g($b, $c, $d);
        return $h[2] < 0 ? ((4294967296 + $h[2]) & 0xffffffff) : $h[2];
}

//function b checks
function b($a) {
        $b = array();
        for ($i = 0; $i < strlen($a); $i++)
                $b[$i] = ord($a[$i]);
        return $b;
}

function makehash ($f) {
        $g = b("info:" . $f);
        return a($g);
}
function googlePageRank($f) {
    return "http://toolbarqueries.google.com/tbr?client=navclient-auto&ch=6" . makehash($f) . "&features=Rank&q=info:" . $f;
//        d = new XMLHttpRequest;
//    d.open("GET", f, !1);
//    d.send(null);
//    return d.responseText.substr(9, 2).replace(/\s$/, "")
}
$_GET['url'] = "www.rentjungle.com";
$url = googlePageRank($_GET['url']);
?>

<a href="<?php echo $url?>"><?php echo $url?></a>