取自国外编程开发技术论坛里的代码,最新Google PR查询工具GoogleCH函数核心代码,获取最新的GOOGLE PR值.

代码如下.

[code]<?php
define('GOOGLE_MAGIC', 0xE6359A60);
function obtainPR($data)
{
     $ret = array();
     $parser = xml_parser_create();
     xml_parser_set_option($parser,XML_OPTION_CASE_FOLDING,0);
     xml_parser_set_option($parser,XML_OPTION_SKIP_WHITE,1);
     xml_parse_into_struct($parser,$data,$values,$tags);
     xml_parser_free($parser);
     $hash_stack = array();
     foreach ($values as $key => $val)
     {
         switch ($val['type'])
         {
           case 'complete':
               array_push($hash_stack, $val['tag']);
               $type = implode($hash_stack, "][");
               if ($type == "RK")
               {
                 $PageRank = $val[value];
               }
               array_pop($hash_stack);
           break;
         }//swhitch
     }//foreach
    
     return $PageRank;
}//obtainPR

//unsigned shift right
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;