What is Google PageRank?:
PageRank is a numeric value that represents how important a page is on the web. It is Google’s way of measuring the importance of web site.
Here is how Google explains PageRank:
PageRank relies on the uniquely democratic nature of the web by using its vast link structure as an indicator of an individual page’s value. Google interprets a link from page A to page B as a vote, by page A, for page B. But Google looks at more than the sheer volume of votes, or links a page receives; it also analyzes the page that casts the vote. Votes cast by pages that are themselves “important” weigh more heavily and help to make other pages “important.”
Firstly, Open Notepad - Copy - Paste and save File name: 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 |= 0×40000000;
$a = ($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 = 0×9E3779B9;
$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(”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;
}
}
?>
Do following:
Copy this code anh paste into any place on your website to view on:
<?php
include(”pagerank.php”);
$gpr = new pageRank();
$gpr->printrank(”http://www.yahoo.com”);
//display image
echo $gpr->get_pr();
?>
An important caveat: since you are modifying core files be sure to note your changes for they will vanish the next time you upgrade your WordPress install.