Location: PHPKode > scripts > Page Rank PHP script > pagerank/pagerank.php
<?php
	define('GOOGLE_MAGIC', 0xE6359A60);

		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){
				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 getPageRank($url){
			$pagerank = -1;
			$ch = "6"._GoogleCH(_strord("info:" . $url));
			$fp = fsockopen("www.google.com", 80, $errno, $errstr, 30);
			if($fp){
				$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, $pos + 9);
				}
				fclose($fp);
			}
			return $pagerank;
		}
?>
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