Sayfanin Google PageRank Degerini Ögrenme - Geniş Kapsamlı Doküman ve Makale Sitesi

<?php

This code is released unto the public domain

header("Content-Type: text/plain; charset=utf-8");

define('GOOGLE_MAGIC', 0xE6359A60);

//unsigned shift right

function zeroFill($a, $b)

{
$z = hexdec(80000000);
//echo $z;

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) /* all the case statements fall through */

{
case 11: $c+=($url[$k+10]<<24);

case 10: $c+=($url[$k+9]<<16);

case 9 : $c+=($url[$k+8]<<8);

/* the first byte of c is reserved for the length */

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]);

/* case 0: nothing left to add */

}

$mix = mix($a,$b,$c);

//echo $mix[0];

/*-------------------------------------------- report the result */

return $mix[2];

}

//converts a string into an array of integers containing the numeric value of the char

function strord($string) {
    for($i=0;$i<strlen($string);$i++) {
        $result[$i] = ord($string{$i});
    }
    return $result;

}
// http://www.example.com/ - Checksum: 6540747202

$url = $_GET['url'];
//print("url:\t{$_GET['url']}\n");

$ch = "6" . GoogleCH(strord("info:" . $url));

$fp = fsockopen("www.google.com", 80, $errno, $errstr, 30);
if (!$fp) {
   echo "$errstr ($errno)<br />\n";
} else {
   $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);
          echo "<body bgcolor=#e6e6e6>";
          echo "The page rank for $url is $pagerank";
          echo "<img src=pr$pagerank.gif>";
     }
   }
   fclose($fp);
}

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