代码如下：
<?php /** * blog.hd001.com Google PageRank Generator * * * @link: http://blog.hd001.com * @author: Pasio & superspice <superspice at yeah dot net> * @version: 0.1 */ @error_reporting(E_ALL ^ E_NOTICE); define('GOOGLE_MAGIC', 0xE6359A60); //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 = $length; while($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) /* all the case statements fall through */ { 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]); /* case 0: nothing left to add */ } $mix = mix($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 $result; } // http://www.example.com/ - Checksum: 6540747202 if (!isset($_GET['url'])) { $url_o = $_SERVER['HTTP_REFERER']; } else { $url_o = $_GET['url']; } $url_o = explode("?", $url_o); $url_o = $url_o[0]; $url = 'info:'.$url_o; $ch = GoogleCH(strord($url)); $url ='info:'.urlencode($url_o); $cache_filename = "prcache/".urlencode($url_o).".pagerank"; // check exists of cache file, if not exists, create it if(!file_exists($cache_filename) || (file_exists($cache_filename) && filemtime($cache_filename) < time() - 86400)) { $url = "http://toolbarqueries.google.com/search?client=navclient-auto&ch=6$ch&ie=UTF-8&oe=UTF-8&features=Rank&q=$url"; $result = @file_get_contents($url); $tmp = @explode(":", $result); $rank = intval($tmp[2]); $handle = fopen ($cache_filename, "w"); flock($handle, LOCK_EX); fwrite($handle, $rank); flock($handle, LOCK_UN); fclose($handle); } $pagerank = @file_get_contents($cache_filename); $pagerank = 2; $width = 6 * $pagerank; $width_ = 6 * (10-$pagerank); echo "document.writeln('<table width=""80"" border=0 cellpadding=""0"" cellspacing=""0"" style=""font-size:12px""><tr><td align=""center"">PageRank</td></tr><tr><td><table width=""80"" cellpadding=""0"" cellspacing=""1"" bgcolor=""#CCCCCC"" height=""10"" style=""font-size:11px""><tr bgcolor=""#FFFFFF""><td width=""62""><img src="http://www.t086.com/article/2003"/imgs/bar.gif"" width=""$width"" height=""20""><img src="http://www.t086.com/article/2003"/imgs/space.gif"" width=""$width_"" height=""20""></td><td align=""center"" style=""color:red"">$pagerank</td></tr></table></td></tr></table>');";以上代码保存为pagerank.php到plugins目录下。
实现步骤
一、放一个bar.gif到imgs文件夹下，为上图中的绿色图片，再放一个space.gif到imgs文件夹下，该图片是一个1*1的空白图。
二、在plugins目录下建立prcache目录，并保证该目录为apache执行用户可读写的。
三、调用方法是：
页面中，在你想要显示pagerank的地方加入如下代码
<script language="javascript" src="http://www.t086.com/article/plugins/pagerank.php"></script>
完毕！
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