<?php
class GetPR {
	var $pr;
	//銮峰彇鍩熷悕PR
	function zeroFill($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 $mix[2];
	}
	function strord($string){
		for($i=0;$i<strlen($string);$i++) {
			$result[$i] = ord($string{$i});
		}
		return $result;
	}
	function PageRank($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, $pos + 9);
					fclose($fp);
					return $pagerank;
				}
			}
			fclose($fp);
			return 0;
		}
	}
	function printranks($domains){
		foreach($domains as $value){
			$elements[] = $this->printrank($value);
		}
		return $elements;
	}
	function get_pr(){
		return $this->pr;
	}
}