<?php
/*
    This code is released unto the public domain
*/
define('GOOGLE_MAGIC', 0xE6359A60);
//unsigned shift right
function zeroFill($a, $b)
{
    $z = hexdec(80000000);
    //echo $z;
	if ($z & $a)
	{
		$a = ($a>>1);
		$a &= (~$z);
		$a |= 0x40000000;
		$a = ($a>>($b-1));
	}
	else
	{
		$a = ($a>>$b);
	}
	return $a;
}

function mix($a,$b,$c) {
  $a -= $b; $a -= $c; $a ^= (zeroFill($c,13));
  $b -= $c; $b -= $a; $b ^= ($a<<8);
  $c -= $a; $c -= $b; $c ^= (zeroFill($b,13));
  $a -= $b; $a -= $c; $a ^= (zeroFill($c,12));
  $b -= $c; $b -= $a; $b ^= ($a<<16);
  $c -= $a; $c -= $b; $c ^= (zeroFill($b,5));
  $a -= $b; $a -= $c; $a ^= (zeroFill($c,3));
  $b -= $c; $b -= $a; $b ^= ($a<<10);
  $c -= $a; $c -= $b; $c ^= (zeroFill($b,15));
  return array($a,$b,$c);
}
function GoogleCH($url, $length=null, $init=GOOGLE_MAGIC) {
    if(is_null($length)) {
        $length = sizeof($url);
    }
    $a = $b = 0x9E3779B9;
    $c = $init;
    $k = 0;
    $len = $length;
    while($len >= 12) {
        $a += ($url +($url<<8) +($url<<16) +($url<<24));
        $b += ($url +($url<<8) +($url<<16) +($url<<24));
        $c += ($url +($url<<8) +($url<<16)+($url<<24));
        $mix = mix($a,$b,$c);
        $a = $mix; $b = $mix; $c = $mix;
        $k += 12;
        $len -= 12;
    }
    $c += $length;
    switch($len)              /* all the case statements fall through */
    {
        case 11: $c+=($url<<24);
        case 10: $c+=($url<<16);
        case 9 : $c+=($url<<8);
          /* the first byte of c is reserved for the length */
        case 8 : $b+=($url<<24);
        case 7 : $b+=($url<<16);
        case 6 : $b+=($url<<8);
        case 5 : $b+=($url);
        case 4 : $a+=($url<<24);
        case 3 : $a+=($url<<16);
        case 2 : $a+=($url<<8);
        case 1 : $a+=($url);
         /* case 0: nothing left to add */
    }
    $mix = mix($a,$b,$c);
    //echo $mix;
    /*-------------------------------------------- report the result */
    return $mix;
}
//converts a string into an array of integers containing the numeric value of the char
function strord($string) {
    for($i=0;$i<strlen($string);$i++) {
        $result = ord($string{$i});
    }
    return $result;
}
// http://www.example.com/ - Checksum: 6540747202
function getPageRank($url)
{
$ch = "6" . GoogleCH(strord("info:" . $url));
$pr_object = curl_init();
curl_setopt($pr_object,CURLOPT_URL,"http://www.google.com/search?client=navclient-auto&ch=". $ch .  "&features=Rank&q=info:" . $url);
print "http://www.google.com/search?client=navclient-auto&ch=". $ch .  "&features=Rank&q=info:" . $url;
curl_setopt($pr_object, CURLOPT_HEADER , 1);
curl_setopt($pr_object, CURLOPT_RETURNTRANSFER,1);
$rank = curl_exec($pr_object);
$pos = strpos($rank, "Rank_");
if($pos === false){} else{
	$pagerank = substr($rank, $pos + 9);
	return($pagerank);
}
}
/*
$fp = fsockopen("www.google.com", 80, $errno, $errstr, 30);
if (!$fp) {
   echo "$errstr ($errno)<br />\n";
} else {
   $out = "GET /search?client=navclient-auto&ch=". $ch .  "&features=Rank&q=info:" . $url . " HTTP/1.1\r\n";
   $out .= "Host: www.google.com\r\n";
   $out .= "Connection: Close\r\n\r\n";
   fwrite($fp, $out);
   //$pagerank = substr(fgets($fp, 128), 4);
   //echo $pagerank;
   while (!feof($fp)) {
	$data = fgets($fp, 128);
	$pos = strpos($data, "Rank_");
	if($pos === false){} else{
		$pagerank = substr($data, $pos + 9);
		echo $pagerank;
	}
   }
   fclose($fp);
}
*/
//echo "ch: 6".$ch;
?>