Google pagerank checker php script

Google ranks ( between 0 to 10 ) every page of your website. Mostly these ranks depends on number of back links to that page. Highly ranked pages will get higher position in the search results.

Google doesn't provide any direct API to retrive pageranks. So we have to submit the given url to toolbarqueries.google.com in order to get the page rank. Following page rank class do the same, just copy and paste this in a php file
 

class PR {


 


  #google toolbar url


  private $base;


 


  #holds current page rank


  public $rank;


 


  function __construct($url){


    $this->rank=false;


    $this->base="http://toolbarqueries.google.com/tbr?client=navclient-auto&ch=";


    $this->get_google_pagerank($url);


  }


 


  private function get_google_pagerank($url) {


    $query=$this->base.$this->check_hash($this->hash_URL($url)). "&features=Rank&q=info:".$url."&num=100&filter=0";


    $data=file_get_contents($query);


    $pos = strpos($data, "Rank_");


    if($pos === false){}


    else{


      $pagerank = substr($data, $pos + 9);


      $this->rank=$pagerank;


    }


  }


 


  private function str_to_num($Str, $Check, $Magic){


    $Int32Unit = 4294967296; // 2^32


    $length = strlen($Str);


    for ($i = 0; $i < $length; $i++) {


      $Check *= $Magic;


      if ($Check >= $Int32Unit) {


        $Check = ($Check - $Int32Unit * (int) ($Check / $Int32Unit));


        $Check = ($Check < -2147483648) ? ($Check + $Int32Unit) : $Check;


      }


      $Check += ord($Str{$i});


    }


    return $Check;


  }


 


  private function hash_URL($String){


    $Check1 = $this->str_to_num($String, 0x1505, 0x21);


    $Check2 = $this->str_to_num($String, 0, 0x1003F);


    $Check1 >>= 2;


    $Check1 = (($Check1 >> 4) & 0x3FFFFC0 ) | ($Check1 & 0x3F);


    $Check1 = (($Check1 >> 4) & 0x3FFC00 ) | ($Check1 & 0x3FF);


    $Check1 = (($Check1 >> 4) & 0x3C000 ) | ($Check1 & 0x3FFF);


    $T1 = (((($Check1 & 0x3C0) << 4) | ($Check1 & 0x3C)) <<2 ) | ($Check2 & 0xF0F );


    $T2 = (((($Check1 & 0xFFFFC000) << 4) | ($Check1 & 0x3C00)) << 0xA) | ($Check2 & 0xF0F0000 );


    return ($T1 | $T2);


  }


 


  private function check_hash($Hashnum){


    $CheckByte = 0;


    $Flag = 0;


    $HashStr = sprintf('%u', $Hashnum) ;


    $length = strlen($HashStr);


    for ($i = $length - 1; $i >= 0; $i --) {


      $Re = $HashStr{$i};


      if (1 === ($Flag % 2)) {


        $Re += $Re;


        $Re = (int)($Re / 10) + ($Re % 10);


      }


      $CheckByte += $Re;


      $Flag ++;


    }


    $CheckByte %= 10;


    if (0 !== $CheckByte) {


      $CheckByte = 10 - $CheckByte;


      if (1 === ($Flag % 2) ) {


        if (1 === ($CheckByte % 2)) {


          $CheckByte += 9;


        }


        $CheckByte >>= 1;


      }


    }


    return '7'.$CheckByte.$HashStr;


  }


}





if(isset($_GET['url'])){


  $url=$_GET['url'];


  $pr = new PR($url);





  if($pr->rank)


    echo "This page rank:".$pr->rank;


  else


    echo "This page doesn't have any GOOGLE PR";


}


 

Save this file in your htdocs as rank.php and access this page in browser like this:
Note:
As this page connects to toolbarqueries.google.com to retrieve results you must have working internet connection to make this script work.