<?php
  define('GOOGLE_MAGIC', 0xE6359A60);
  function _zeroFill($a, $b){
       $z = hexdec(80000000);
       if ($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[$k + 0] + ($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){
       for($i = 0;$i < strlen($string);$i++)
         $result[$i] = ord($string{$i});
       return $result;
}
  function getPageRank($url){
       $pagerank = -1;
       $ch = "6"._GoogleCH(_strord("info:" . $url));
       $fp = fsockopen("www.google.com", 80, $errno, $errstr, 30);
       if($fp){
         $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, $out);
         while (!feof($fp)){
           $data = fgets($fp, 128);
           $pos = strpos($data, "Rank_");
           if($pos === false){
           }else
             $pagerank = substr($data, $pos + 9);
         }
         fclose($fp);
       }
       return $pagerank;
}
?>