<!-- this script is provided by https://www.phpfreecode.com coded by: Kerixa Inc. -->
<!-- This Script is from www.phpfreecpde.com, Coded by: Kerixa Inc-->

<form action="" method="post">
	<table align="center" style="width: 359px; height: 81px;border: 2px  dashed #000066;">
		<tr>
			<td  style="background-color: #DDFFFF;width: 57px">URL:</td>
			<td  style="background-color: #DDFFFF;width: 112px">
			<input name="url" type="text" style="width: 289px; height: 23px" value="http://"></td>
		</tr>
		<tr>
			<td  style="width: 57px">&nbsp;</td>
			<td style="width: 112px">
		<input name="Submit1" style="width: 133px; height: 29px;" type="submit" value="Find Page Rank"></td>
		</tr>
	</table>
</form>

<?php
if (isset($_POST['url'])){
	$pgr=new GooglePageRankChecker;
	$url=$_POST['url'];
	$rank = $pgr->getRank($url);
	echo '
		<p style="text-align: center;"><span style="font-size: 20pt;color: #0000FF;	border-style:dotted;border-width: 1px;background-color: #FFFFCC;
		"><a href="'.$url.'">'.$url.'</a></span><br>
		<span style="font-size: 18pt;color: #0000FF;border-style:dotted;border-width: 1px;background-color: #FFFFCC;">&nbsp;&nbsp;The Page Rank is:&nbsp;'.$rank.'&nbsp;&nbsp;</span></p>
	';
}


class GooglePageRankChecker {

  // Track the instance
  private static $instance;

  // Constructor
  function getRank($page) {
    // Create the instance, if one isn't created yet
    if(!isset(self::$instance)) {
      self::$instance = new self();
    }
    // Return the result
    return self::$instance->check($page);
  }

  // Convert string to a number
  function stringToNumber($string,$check,$magic) {
    $int32 = 4294967296;  // 2^32
      $length = strlen($string);
      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 >= $int32) {
              $check = ($check - $int32 * (int) ($check / $int32));
              //if the check less than -2^31
              $check = ($check < -($int32 / 2)) ? ($check + $int32) : $check;
          }
          $check += ord($string{$i});
      }
      return $check;
  }

  // Create a url hash
  function createHash($string) {
    $check1 = $this->stringToNumber($string, 0x1505, 0x21);
      $check2 = $this->stringToNumber($string, 0, 0x1003F);

    $factor = 4;
    $halfFactor = $factor/2;

      $check1 >>= $halfFactor;
      $check1 = (($check1 >> $factor) & 0x3FFFFC0 ) | ($check1 & 0x3F);
      $check1 = (($check1 >> $factor) & 0x3FFC00 ) | ($check1 & 0x3FF);
      $check1 = (($check1 >> $factor) & 0x3C000 ) | ($check1 & 0x3FFF);  

      $calc1 = (((($check1 & 0x3C0) << $factor) | ($check1 & 0x3C)) << $halfFactor ) | ($check2 & 0xF0F );
      $calc2 = (((($check1 & 0xFFFFC000) << $factor) | ($check1 & 0x3C00)) << 0xA) | ($check2 & 0xF0F0000 );

      return ($calc1 | $calc2);
  }

  // Create checksum for hash
  function checkHash($hashNumber)
  {
      $check = 0;
    $flag = 0;

    $hashString = sprintf('%u', $hashNumber) ;
    $length = strlen($hashString);

    for ($i = $length - 1;  $i >= 0;  $i --) {
      $r = $hashString{$i};
      if(1 === ($flag % 2)) {
        $r += $r;
        $r = (int)($r / 10) + ($r % 10);
      }
      $check += $r;
      $flag ++;
    }

    $check %= 10;
    if(0 !== $check) {
      $check = 10 - $check;
      if(1 === ($flag % 2) ) {
        if(1 === ($check % 2)) {
          $check += 9;
        }
        $check >>= 1;
      }
    }

    return '7'.$check.$hashString;
  }

  function check($page) {

    // Open a socket to the toolbarqueries address, used by Google Toolbar
    $socket = fsockopen("toolbarqueries.google.com", 80, $errno, $errstr, 30);

    // If a connection can be established
    if($socket) {
      // Prep socket headers
      $out = "GET /tbr?client=navclient-auto&ch=".$this->checkHash($this->createHash($page)).
              "&features=Rank&q=info:".$page."&num=100&filter=0 HTTP/1.1\r\n";
      $out .= "Host: toolbarqueries.google.com\r\n";
      $out .= "User-Agent: Mozilla/4.0 (compatible; GoogleToolbar 2.0.114-big; Windows XP 5.1)\r\n";
      $out .= "Connection: Close\r\n\r\n";

      // Write settings to the socket
      fwrite($socket, $out);

      // When a response is received...
      $result = "";
      while(!feof($socket)) {
        $data = fgets($socket, 128);
        $pos = strpos($data, "Rank_");
        if($pos !== false){
          $pagerank = substr($data, $pos + 9);
          $result += $pagerank;
        }
      }
      // Close the connection
      fclose($socket);

      // Return the rank!
      return $result;
    }
  }
}
?>

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