Pr ohne Toolbar

Hier ein kleiner Codeschnipsel um den PR einer Website ohne Toolbar die Google Toolbar zu berechnen. Das Script dient der Demonstration, wie der PR ohne die Verwendung der Toolbar abgefragt werden kann. Der Einsatz des Scripts ohne die Genehmigung von Google verstößt gegen deren Dienstleitungsbedingungen.

Script:

<?php define('GMAG', 0xE6359A60); //unsigned shift right 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; $a ^= (zeroFill($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,$c); } function GCH($url, $length=null, $init=GMAG) {     if(is_null($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);     /*-------------------------------------------- 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 $result; } function getPR($_url) {     $url = 'info:'.$_url;     $ch = GCH(strord($url));     $url='info:'.urlencode($_url);     $pr = file("http://www.google.com/search?client=navclient-auto&ch=6$ch&ie=UTF-8&oe=UTF-8&features=Rank&q=$url");     $pr_str = implode("", $pr);     return substr($pr_str,strrpos($pr_str, ":")+1); } echo "Der PR Ihrer Seite ist: ".getPR("http://www.beispiel.de"); ?>