关于PHP在linux下面获取GOOGLE的PR值_PHP教程

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("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 array($pagerank,$url);
}
}
fclose($fp);
return array(0,$url);
}
}

function printranks($domains){
foreach($domains as $value){
$elements[] = $this->printrank($value);
}
return $elements;
}
//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 get_pr(){
return $this->pr;
}
}
$gpr = new pageRank();
var_dump($gpr->printrank("www.mb5u.com"));