<?php

//PageRank Lookup v1.1 by HM2K (update: 31/01/07)
//based on an alogoritham found here: http://pagerank.gamesaga.net/
#$url='http://skovpen.org/';
//settings - host and user agent
$googlehost[]='toolbarqueries.google.com';
#$googlehost[]='64.233.161.99';
#$googlehost[]='64.233.167.99';
#$googlehost[]='64.233.179.99';
#$googlehost[]='64.233.185.99';
#$googlehost[]='66.102.9.99';
#$googlehost[]='66.102.11.99';
#$googlehost[]='66.249.93.99';
#$googlehost[]='72.14.207.99';
#$googlehost[]='216.239.59.99';

$googleua='Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.0.6) Gecko/20060728 Firefox/1.5';

//convert a string to a 32-bit integer

function StrToNum($Str, $Check, $Magic) {
  $Int32Unit = 4294967296;  // 2^32

  $length = strlen($Str);
  for ($i = 0; $i < $length; $i++) {
      $Check *= $Magic;
      //If the float is beyond the boundaries of integer (usually +/- 2.15e+9 = 2^31),
      //  the result of converting to integer is undefined
      //  refer to http://www.php.net/manual/en/language.types.integer.php
      if ($Check >= $Int32Unit) {
          $Check = ($Check - $Int32Unit * (int) ($Check / $Int32Unit));
          //if the check less than -2^31
          $Check = ($Check < -2147483648) ? ($Check + $Int32Unit) : $Check;
      }
      $Check += ord($Str{$i});
  }
  return $Check;
}

//genearate a hash for a url

function HashURL($String) {
  $Check1 = StrToNum($String, 0x1505, 0x21);
  $Check2 = StrToNum($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);
}

//genearate a checksum for the hash string

function CheckHash($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;
}

//return the pagerank checksum hash

function getch($url) { return CheckHash(HashURL($url)); }

//return the pagerank figure

function getpr($url,$ghost){
 global $googlehost,$googleua;
 $ch = getch($url);
 $fp = fsockopen($googlehost[$ghost], 80, $errno, $errstr, 30);
 if ($fp) {

//vvvvvvvvvvvvvvvvvvvvvvvv СЮДА ОБРАТИТЬ ОСОБОЕ ВНИМАНИЕ!!!!

 $url=rawurlencode($url);

//^^^^^^^^^^^^^^^^^^^^^^^^ СЮДА ОБРАТИТЬ ОСОБОЕ ВНИМАНИЕ!!!!

   $out = "GET /search?client=navclient-auto&ch=$ch&features=Rank&q=info:$url HTTP/1.1\r\n";
   $out .= "User-Agent: $googleua\r\n";
   $out .= "Host: $googlehost\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{
       $pr=substr($data, $pos + 9);
       $pr=trim($pr);
       $pr=str_replace("\n",'',$pr);
       return $pr;
     }
   }
   fclose($fp);
 }
}

//generate the graphical pagerank

function pagerank($url) {
 global $googlehost;

 if (!preg_match('/^(http:\/\/)?([^\/]+)/i', $url)) { $url='http://'.$url; }
$pagerank='';
 for($i=0;$i<count($googlehost);$i++){
   $pr=getpr($url,$i);
   $pagerank.="{$googlehost[$i]}: $pr<BR>";
 }
 return $pagerank;
}

if (isset($_REQUEST['url'])) print $_REQUEST['url'];
echo '<BR>
<form action="" method="post">
<input name="url" size=50 type="text" value="">
<input type="submit" name="Submit" value="Get Pagerank"></form>

<BR>';

if (isset($_REQUEST['url'])) { echo pagerank($_REQUEST['url']); }
?>