pagerank bulma scriptleri nasıl buluyorlar pagerank ı bakıyorum kodlara bir sürü gereksiz kod var
<?php
define('GOOGLE_MAGIC', 0xE6359A60);
function toInt32(& $x){
$z = hexdec(80000000);
$y = (int)$x;
if($y==-$z&&$x<-$z){
$y = (int)((-1)*$x);
$y = (-1)*$y;
}
$x = $y;
}
function zeroFill($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 -= $c; toInt32($a); $a = (int)($a ^ (zeroFill($c,13)));
$b -= $c; $b -= $a; toInt32($b); $b = (int)($b ^ ($a<<8));
$c -= $a; $c -= $b; toInt32($c); $c = (int)($c ^ (zeroFill($b,13)));
$a -= $b; $a -= $c; toInt32($a); $a = (int)($a ^ (zeroFill($c,12)));
$b -= $c; $b -= $a; toInt32($b); $b = (int)($b ^ ($a<<16));
$c -= $a; $c -= $b; toInt32($c); $c = (int)($c ^ (zeroFill($b,5)));
$a -= $b; $a -= $c; toInt32($a); $a = (int)($a ^ (zeroFill($c,3)));
$b -= $c; $b -= $a; toInt32($b); $b = (int)($b ^ ($a<<10));
$c -= $a; $c -= $b; toInt32($c); $c = (int)($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 $result;
}
function getrank($url) {
$url = 'info:'.$url;
$ch = GoogleCH(strord($url));
$file = "http://www.google.com/search?client=navclient-auto&ch=6$ch&features=Rank&q=$url";
$data = file($file);
$rankarray = explode (':', $data[2]);
$rank = $rankarray[2];
return $rank;
}
if(!$_GET['url']) {
$pr_rank = "Page rank could not be displayed!";
} else {
$url = "http://www.".$_GET['url'];
$pr_rank = getrank($url);
}
print '
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-9" />
<title>Google Page Rank</title>
</head>
<body>
<table width="100%" border="0" cellpadding="2" cellspacing="0" bgcolor="#FFFFFF">
<tr>
<td colspan="2"><h1>Google PageRank for: '. $_GET[url].'</h1></td>
</tr>
<tr>
<td width="30%">Google page rank:</td>
<td width="70%">'.$pr_rank.'</td>
</tr>
</table>
</body>
</html>';
?>burda yapılan işlem nedir birisi kısaca anlatabilir mi