Google Page Rank checker code inside (open source) - Question

<?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) 
{ 
    $z = hexdec(80000000); 
        if ($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; 
} 
// [url]http://www.example.com/[/url] - Checksum: 6540747202 
$url = 'info:'.$_GET['url']; 
print("url:\t{$_GET['url']}\n"); 
$ch = GoogleCH(strord($url)); 
printf("ch:\t6%u\n",$ch); 
?> 

PHP:

Just curious as to if anyone else uses this code in their sites, such as iwebtool and others. I was thinking of putting it to use, I see a few people selling sites here that utilize this code, even some selling the code.. maybe some feedback on this would be nice...

Thanks in advance.

 

http://www.everyscript.de/PRank.htm


there is also the source of the up to date code for perl

it is a free code, just looking for feedback on it...

 

I dont think google agrees with these tools, if they would, then it would have been much simplier, but the way there are, it's pretty obvious someone did reverse engineering on the toolbar which is pretty much illegal

 

As far as I know this is the only way to get the PR of a page from google.

Also pretty sure that this is how the keyword tracker tool must work (as there isn't really another way).

 

Sorry, which keyword tool are you talking about? The one here at DP?

This code is confusing...Could the thread starter provide some reference to its origin or a URL duscussing it further?

 

Yes, and probably any other scripts that do the same.

If google wanted to stop this script working they could quite easily. Or they could make it part of the API.

I was reading this post about an RK value being passed in the google results XML feed which may be the actual up to date PageRank.

 

I think the latest PR flux has disproved the theory that RK means current pagerank.

 

Isn't that those scripts illegal? Is it okay with Google?

 

Your not supposed to pull PR without using the API. Any server that runs PR checking code without using the API runs the risk of having that server (IP) blocked from requesting PR in the future. It happens on occasion with those running directory scripts that check PR as well as some SEO software.

 

But is there a way to get PR using the API?

 

Yea the directory scripts, like phpld, do it.

 

Quote from David the owner of phpld on his forum a few weeks ago.

It looks like phpld uses the script discussed above. dvduval is the owner and is on this forum I think.........

 

Do you remember where you saw an example of a site deploying a PR checking tool, or even a mass data center PR checking tool, and then getting banned? Everyone is runnng it. Seochat for one.

How do you figure? I mean there are a million sites running this toolbar hacked code and not a lot G can do about it from where Im standing. My guess is it will be imbedded in the API very soon as you point out - In fact I would be very surprised if it isn't this RK value after all.

 

Can anyone please give a link to future pagerank/pagerank prediction php script ? I mean the actual source code, not a site providing such a service.

 

Check the first post in this thread...? The code is in an iframe.

 

Hey Guys, Is it bad to query google for this? I thought this is not illigal.

 

I was asking for PR prediction script, not current PR detection.
Also, if anyone has php scripts of backlinks/alexa checking, etc - i will greatly appreciate that.

 

You can't predict pagerank, there are no reliable scripts to do this.

 

did anyone tracnscript it to jsp yet ?
was looking for it for a few weeks, but no success.
php is good, but need it in jsp.

can do it on my own, but need extra couple hours, which i have not

 

I am using a php script which is similar to the above script. I have collected it from internet. But I forgot from where.