日期:2011-09-03  浏览次数:20488 次

最近一直在忙友链,也乘机学习一下PR值相关知识,试着用PHP实现PR查询。

Google PR值是什么在此不做过多的介绍,简单的说就是你的PR值越高代表的你网站越重要越受欢迎,不过这个值最高为10,下面这个代码可以获得一个网站的PR值。
  用PHP脚本程序获取网站的PR值的主要代码如下:
  程序如下:<?php
  $googlehost="toolbarqueries.google.com";
  $googleua="Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.0.6) Gecko/20060728 Firefox/1.5";
  echo getpr
  //convert a string to a 32-bit integer
  function StrToNum($Str, $Check, $Magic) {
  $Int32Unit = 4294967296; // 2^32
  $length = strlen($Str);
  for ($i = 0; $i < $length; $i++) {
  $Check *= $Magic;
  //If the float is beyond the boundaries of integer (usually +/- 2.15e+9 = 2^31),
  // the result of converting to integer is undefined
  // refer to php.net/manual/en/language.types.integer.php
  if ($Check >= $Int32Unit) {
  $Check = ($Check - $Int32Unit * (int) ($Check / $Int32Unit));
  //if the check less than -2^31
  $Check = ($Check < -2147483648) ? ($Check + $Int32Unit) : $Check;
  }
  $Check += ord($Str{$i});
  }
  return $Check;
  }
  //genearate a hash for a url
  function HashURL($String) {
  $Check1 = StrToNum($String, 0×1505, 0×21);
  $Check2 = StrToNum($String, 0, 0×1003F);
  $Check1 》= 2;
  $Check1 = (($Check1 》 4) & 0×3FFFFC0 ) ($Check1 & 0×3F);
  $Check1 = (($Check1 》 4) & 0×3FFC00 ) ($Check1 & 0×3FF);
  $Check1 = (($Check1 》 4) & 0×3C000 ) ($Check1 & 0×3FFF);
  $T1 = (((($Check1 & 0×3C0) 《 4) ($Check1 & 0×3C)) 《2 ) ($Check2 & 0xF0F );
  $T2 = (((($Check1 & 0xFFFFC000) 《 4) ($Check1 & 0×3C00)) 《 0xA) ($Check2 & 0xF0F0000 );
  return ($T1 $T2);
  }
  //genearate a checksum for the hash string
  function CheckHash($Hashnum) {
  $CheckByte = 0;
  $Flag = 0;
  $HashStr = sprintf(‘%u’, $Hashnum) ;
  $length = strlen($HashStr);
  for ($i = $length - 1; $i >= 0; $i –) {
  $Re = $HashStr{$i};
  if (1 === ($Flag % 2)) {
  $Re += $Re;
  $Re = (int)($Re / 10) + ($Re % 10);
  }
  $CheckByte += $Re;
  $Flag ++;
  }
  $CheckByte %= 10;
  if (0 !== $CheckByte) {
  $CheckByte = 10 - $CheckByte;
  if (1 === ($Flag % 2) ) {
  if (1 === ($CheckByte % 2)) {
  $CheckByte += 9;
  }
  $CheckByte 》= 1;
  }
  }
  return "7".$CheckByte.$HashStr;
  }