php goolge pr查詢程式碼

//下面的函數用於查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; $a ^= (zeroFill($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 ReadPR($link)
{
 $fp = fsockopen ("www.google.com", 80, $errno, $errstr, 30);
 if (!$fp)
 {
  echo "$errstr ($errno)n";
  exit(1);
 }
 else
 {
  $out = "GET $link HTTP/1.0rn";
  $out .= "Host: toolbarqueries.google.comrn";
  $out .= "User-Agent: Mozilla/4.0 (compatible; GoogleToolbar 2.0.114.9-big; Linux 2.6)rn";
  $out .= "Connection: Closernrn";
  fwrite($fp, $out);
  do{
  $line = fgets($fp, 128);
  }while ($line !== "rn");
  $data = fread($fp,8192);
  fclose ($fp);
  return $data;
 }
}

function GetPR($url)
{
 $url ='info:'.$url;
 $ch = GoogleCH(strord($url));
 $data = ReadPR("/search?client=navclient-auto&ch=6$ch&features=Rank&q=$url");
 $rankarray = explode (':', $data);
 if(trim($rankarray[2])!=""){
  return $rankarray[2];
 }
 else
  return "0";
}