Google pagerank cheker by PHP

[php.net]

Hello,

Any one this script working with him.

pagerank.php

<?php 
define('GOOGLE_MAGIC', 0xE6359A60); 
class pageRank{
var $pr; 
 function zeroFill($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; $a ^= ($this->zeroFill($c,13));
   $b -= $c; $b -= $a; $b ^= ($a<<8);
   $c -= $a; $c -= $b; $c ^= ($this->zeroFill($b,13));
   $a -= $b; $a -= $c; $a ^= ($this->zeroFill($c,12));
   $b -= $c; $b -= $a; $b ^= ($a<<16);
   $c -= $a; $c -= $b; $c ^= ($this->zeroFill($b,5));
   $a -= $b; $a -= $c; $a ^= ($this->zeroFill($c,3));
   $b -= $c; $b -= $a; $b ^= ($a<<10);
   $c -= $a; $c -= $b; $c ^= ($this->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 = $this->mix($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);
   /* 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]); 
  } 
  $mix = $this->mix($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 printrank($url){
  $ch = "6".$this->GoogleCH($this->strord("info:" . $url)); 
  
  $fp = fsockopen("http://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);
           $this->pr_image($pagerank);
         }
     }
     fclose($fp); 
  }
 }
//display pagerank image. Create your own or download images I made for this script. If you make your own make sure to call them pr0.gif, pr1.gif, pr2.gif etc.
 function pr_image($pagerank){
  if($pagerank == 0){
   $this->pr = "<img src=\"images/pr0.gif\" alt=\"PageRank " .$pagerank. " out of 10\">" ;
   }elseif($pagerank == 1){
   $this->pr = "<img src=\"images/pr1.gif\" alt=\"PageRank " .$pagerank. " out of 10\">" ;
   }elseif($pagerank == 2){
   $this->pr = "<img src=\"images/pr2.gif\" alt=\"PageRank " .$pagerank. " out of 10\">" ;
   }elseif($pagerank == 3){
   $this->pr = "<img src=\"images/pr3.gif\" alt=\"PageRank " .$pagerank. " out of 10\">" ;
   }elseif($pagerank == 4){
   $this->pr = "<img src=\"images/pr4.gif\" alt=\"PageRank " .$pagerank. " out of 10\">" ;
   }elseif($pagerank == 5){
   $this->pr = "<img src=\"images/pr5.gif\" alt=\"PageRank " .$pagerank. " out of 10\">" ;
   }elseif($pagerank == 6){
   $this->pr = "<img src=\"images/pr6.gif\" alt=\"PageRank " .$pagerank. " out of 10\">" ;
   }elseif($pagerank == 7){
   $this->pr = "<img src=\"images/pr7.gif\" alt=\"PageRank " .$pagerank. " out of 10\">" ;
   }elseif($pagerank == 8){
   $this->pr = "<img src=\"images/pr8.gif\" alt=\"PageRank " .$pagerank. " out of 10\">" ;
   }elseif($pagerank == 9){
   $this->pr = "<img src=\"images/pr9.gif\" alt=\"PageRank " .$pagerank. " out of 10\">" ;
   }else{
   $this->pr = "<img src=\"images/pr10.gif\" alt=\"PageRank " .$pagerank. " out of 10\">" ;
  }
 }
 function get_pr(){
  return $this->pr;
 }
}
?>

test.php

<?php
include("pagerank.php");
$gpr = new pageRank();
$gpr->printrank("http://www.sitepoint.com/");
//display image
echo $gpr->get_pr();
?>

i waiting answers and thnks for help

[Dan Grossman]

What doesn't work for you? What happens that isn't expected? Do you get any errors?

[php.net]

I dont see any results for it, give me blank page

[darksystem]

I also tried that script but it gives me a blank page.
Hopefully somebody will give their ideas.

[Egyptechno]

same here ..

Iam just wondering .. how did you know all this caluclations ?

[darksystem]

I think I knw why we're getting blank page is we dont have the images to display lol

[Dan Grossman]

same here ..

Iam just wondering .. how did you know all this caluclations ?

This is a class wrapped around a PHP script that's been circulating the net for well over a year. Someone figured out the checksum algorithm and then someone else translated it into PHP.

I know the functions this script uses from that other script work correctly as I've used them.

[Jack_In_The_Box]

This script works, I've been using it for a while (I modified the original to display a graphic representation).

Original script:

http://www.searchengineengine.com/fi...erank-code.txt

Hope that helps.

[php.net]

Thanks all for this replay
but Jack_In_The_Box i test your code and i get :

PageRank of www.google.com is:
N/A 

all results for URL's N/A

thanks

[Jack_In_The_Box]

The code works, I just tested it.

Here it goes again, I've removed some COMMENTS.

<?php
/*
    This code is released unto the public domain
    This script is originally from: http://www.googlecommunity.com/scripts/google-pagerank.php
    It is also hosted, and was modified slightly, by: http://www.searchengineengine.com
    The architecture is:
        getrank($url) function - The function called externally to get the PageRank
            strord($url) function - Function called by getrank() to convert the url string into a numeric 

string
            GoogleCH($numericstring) function - Function called by getrank() to get the checksum of the url
                mix($a, $b, $c) function - Called by GoogleCH() during checksum calculation
                    zeroFill($a, $b) function - Called by mix() during mixing
*/

//header("Content-Type: text/plain; charset=utf-8");        //Uncommenting this makes the file downloadable rather 

than executable

define("GOOGLE_MAGIC", 0xE6359A60);        //Define the named constant "GOOGLE_MAGIC"

//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) {        //This function is used in the Google Checksum calculation
    $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, $init=GOOGLE_MAGIC) {        //Calculate the Google Checksum for a given URL
    if(is_null($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);
    return $mix[2];
}

function strord($string) {        //converts a string into an array of integers containing the numeric value of the 

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

function getrank($url, $prefix="info:", $datacenter="www.google.com") {                //This is the function 

used to get the PageRank value.
        //If $prefix is "info:", then the Toolbar pagerank will be returned.
        //$datacenter sets the datacenter to get the results from. e.g., "www.google.com", "216.239.53.99", 

"66.102.11.99".
    $url = $prefix.$url;
    $ch = GoogleCH(strord($url));        //Get the Google checksum for $url using the GoogleCH function.
    $file = "http://$datacenter/search?client=navclient-auto&ch=6$ch&features=Rank&q=$url";
        //To get the Crawl Date instead of the PageRank, change "&features=Rank" to "&features=Crawldate"
        //To get detailed XML results, remove "&features=Rank"
    $oldlevel = error_reporting(0);        //Suppress error reporting temporarily.
    $data = file($file);
    error_reporting($oldlevel);            //Restart error reporting.
    if(!$data || preg_match("/(.*)\.(.*)/i", $url)==0) return "N/A";            //If the Google data is 

unavailable, or the URL is invalid, return "N/A".
        //The preg_match check is a very basic url validator that only checks if the URL has a period in it.
    $rankarray = explode (":", $data[2]);        //There are two line breaks before the PageRank data on the Google 

page.
    $rank = trim($rankarray[2]);        //Trim whitespace and line breaks.
    if($rank=="") return "N/A";            //Return N/A if no rank.
    return $rank;
}

function getrealrank($url, $datacenter="www.google.com"){
    $ch = GoogleCH(strord($url));
    $array = xmltoarray("http://$datacenter/search?client=navclient-auto&ch=6$ch&q=$url");
    $infoarray = $array['GSP'][0]['RES'][0]['R'];
    $nonwwwurl = str_replace("www.", "", $url);
    $urlpermutationsarray = array($url, "http://".$url, "http://www.".$url, $url."/", "http://".$url."/", 

"http://www.".$url."/", $nonwwwurl, "http://".$nonwwwurl, "http://www.".$nonwwwurl, $nonwwwurl."/", 

"http://".$nonwwwurl."/", "http://www.".$nonwwwurl."/"); 
    for($i=0; $i<count($infoarray); $i++){
        $urlU = $infoarray[$i]['U'];        //U is the URL. UE is the 'clean' URL.
        $urlrank = $infoarray[$i]['RK'];
        foreach($urlpermutationsarray as $permutation){
            if(strtolower($permutation)==strtolower($urlU)) return $urlrank;        //Case insensitive 

match.
        }
    }
    return "Unknown";        //If no matches found.
}

    //Example of how to use the getrank function.
$url = "www.google.com";
echo "PageRank of ".$url." is:<br />".getrank($url);


?>

[php.net]

Thanks Jack_In_The_Box,

But the results is same

PageRank of www.google.com is:
N/A 

thanks

[Dan Grossman]

That code only returns "N/A" for me as well. This works:

<?php
// PHP Google PageRank Calculator Script
// -------------------------- April 2005
// Contact author: pagerankscript@googlecommunity.com

// for updates, visit:
// http://www.googlecommunity.com/scripts/google-pagerank.php

// provided by www.GoogleCommunity.com
//  an unofficial community of Google fans
// ---------------------------------------

/*
    This code is released unto the public domain
*/
define('GOOGLE_MAGIC', 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 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);
    /*-------------------------------------------- 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 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;
}

echo "PageRank for www.google.com is " . getrank('www.google.com');

?>

[root@silver tools]# php prtest.php
PageRank for www.google.com is 10

[MikeBigg]

Dan,

that only ever returns 10 for me ... I tried a few sites.

edit: my mistake, I was testing it wrongly.

Mike

[php.net]

Dan,

I test your code and i get this result

Warning: file(http://www.google.com/search?client=navclient-auto&ch=6-2147435329&features=Rank&q=info:www.google.com): failed to open stream: HTTP request failed! HTTP/1.0 403 Forbidden in /home/****/public_html/google.php on line 102
PageRank for www.google.com is 

whats worng

thanks for your help

[Jack_In_The_Box]

Dude, what exactly are you doing?, I mean, my code and Dan's works for me.

[Dan Grossman]

That checksum is wrong. It's not the checksum the script computes on my servers. I have no idea why it'd be wrong.

YOURS:
http://www.google.com/search?client=navclient-auto&ch=6-2147435329&features=Rank&q=info:www.google.com

MINE:
http://www.google.com/search?client=navclient-auto&ch=6340563836&features=Rank&q=info:www.google.com

[Jack_In_The_Box]

Looks like this script DOESN'T work on some servers, read the FAQ at the bottom of the page.

http://www.googlecommunity.com/scrip...e-pagerank.php

Both scripts work on mine though.

[php.net]

Jack_In_The_Box , Dan Grossman i test this Dan code in other server it worked fine for me but i dont konw why not working with my server.

and any one know other script working with images for ranking like first code here

Thanks for all help

[Dan Grossman]

Jack_In_The_Box , Dan Grossman i test this Dan code in other server it worked fine for me but i dont konw why not working with my server.

and any one know other script working with images for ranking like first code here

Thanks for all help

Adding images is trivial, but you can't do it with any script if you can't compute the checksum first.

[php.net]

Thanks Dan,

for your help,but working with checksum so hard and i see first script with images but not working with me in any server.

Thanks again

[markl999]

I think this might be more to do with Google than you as I've had the exact same problem in the past. Whilst testing a page rank script it suddenly stopped working with the same error you are getting, I think maybe Google blocks your IP after a while if you are persistently hammering it as you might do during testing. The same script that failed one day just started working a few days later as if the block had been removed.

[Dan Grossman]

I think this might be more to do with Google than you as I've had the exact same problem in the past. Whilst testing a page rank script it suddenly stopped working with the same error you are getting, I think maybe Google blocks your IP after a while if you are persistently hammering it as you might do during testing. The same script that failed one day just started working a few days later as if the block had been removed.

Yes that happens, but it's not the case here. The scripts are not computing the checksum value correctly on his server, so he will get a 403 error even if his server is not blocked. I can test it in my browser -- send a wrong checksum, get a 403, send a correct checksum, get pagerank info back.

[sparky06]

Yes that happens, but it's not the case here. The scripts are not computing the checksum value correctly on his server, so he will get a 403 error even if his server is not blocked. I can test it in my browser -- send a wrong checksum, get a 403, send a correct checksum, get pagerank info back.

I have the same exact problem with only one of my servers. It works everywhere else but on one specific machine and I have verfied by remotely querying via curl that the server is NOT blocked.

As best I can tell function strord() passes the correct array elements however the function GoogleCH() function is lousing something up. I had even recompiled php to the same version as I have running on my laptop however using the same exact code on both produces different checksums.

To debug I compiled a C version (gcc pr.c) and it does in fact calculate the correct checksum.... php does not. If anyone has any ideas Id love to hear them LOL

The affected server is a Centos 4 machine running php 5.1.5 on Intel (2.6.9-11.ELsmp #1 SMP Wed Jun 8 17:54:20 CDT 2005 i686 i686 i386 GNU/Linux)

[sparky06]

BTW: this is the kind of thing you can just beat your head against the wall debugging... lol