To download the .php source file for the script, click the download button:

download

To use the script just include it in your files and call the getPageRank() function, passing the URL as the parameter. This function will return a value from 0 to 10 (the page rank) or -1 on failure. You should check this value before outputting the pagerank. Unfortunately, some IPs may be banned by Google, therefore the server running this code may not be allowed to query the Google servers. In this case the pagerank returned will always be -1.

Here is an example:

<?php

  // content of somefile.php

  include('pagerank.php');

  $pr = getPageRank('http://www.pagerankcode.com');

  echo 'pagerankcode.com has PR '.$pr;

?>


The following is the code-highlighted script that can be downloaded via the above link.


Google PageRank PHP source script

<?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;
}

?>