代码如下：
- /**
- * blog.hd001.com google PageRank Generator
- *
- *
- * @link: http://blog.hd001.com
- * @author: Pasio & superspice
- * @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; $b ^= ($a8);
- $c -= $a; $c -= $b; $c ^= (zeroFill($b,13));
- $a -= $b; $a -= $c; $a ^= (zeroFill($c,12));
- $b -= $c; $b -= $a; $b ^= ($a16);
- $c -= $a; $c -= $b; $c ^= (zeroFill($b,5));
- $a -= $b; $a -= $c; $a ^= (zeroFill($c,3));
- $b -= $c; $b -= $a; $b ^= ($a10);
- $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($i=0;$istrlen($string);$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('
\"80\" border=0 cellpadding=\"0\" cellspacing=\"0\" style=\"font-size:12px\">
');";\"center\">PageRank \"80\" cellpadding=\"0\" cellspacing=\"1\" bgcolor=\"#CCCCCC\" height=\"10\" style=\"font-size:11px\">
\"#FFFFFF\"> \"62\"> \"/imgs/bar.gif\" width=\"$width\" height=\"20\">
\"center\" style=\"color:red\">$pagerank
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="plugins/pagerank.php"></script>
完毕！
