页面中嵌入google的pagerank显示

代码如下：

1. <?php
2. /**
3. * blog.hd001.com Google PageRank Generator
4. *
5. *
6. * @link:????http://blog.hd001.com
7. * @author:??Pasio & superspice <superspice at yeah dot net>
8. * @version: 0.1
9. */
11. @error_reporting(E_ALL ^ E_NOTICE);
13. define('GOOGLE_MAGIC',0xE6359A60);
15. //unsigned shift right
16. function zeroFill($a,$b)
17. {
18. ????$z = hexdec(80000000);
19. ????????if ($z & $a)
20. ????????{
21. ????????????$a = ($a>>1);
22. ????????????$a &= (~$z);
23. ????????????$a |= 0x40000000;
24. ????????????$a = ($a>>($b-1));
25. ????????}
26. ????????else
27. ????????{
28. ????????????$a = ($a>>$b);
29. ????????}
30. ????????return $a;
31. }???
32. ???
33. ???
34. function mix($a,$b,$c) {
35. ??$a -= $b; $a -= $c; $a ^= (zeroFill($c,13));???
36. ??$b -= $c; $b -= $a; $b ^= ($a<<8);???
37. ??$c -= $a; $c -= $b; $c ^= (zeroFill($b,13));
38. ??$a -= $b; $a -= $c; $a ^= (zeroFill($c,12));
39. ??$b -= $c; $b -= $a; $b ^= ($a<<16);
40. ??$c -= $a; $c -= $b; $c ^= (zeroFill($b,5));???
41. ??$a -= $b; $a -= $c; $a ^= (zeroFill($c,3));????
42. ??$b -= $c; $b -= $a; $b ^= ($a<<10);???
43. ??$c -= $a; $c -= $b; $c ^= (zeroFill($b,15));
44. ????
45. ??return array($a,$c);
46. }
47. ???
48. function GoogleCH($url,$length=null,$init=GOOGLE_MAGIC) {
49. ????if(is_null($length)) {
50. ????????$length = sizeof($url);
51. ????}
52. ????$a = $b = 0x9E3779B9;
53. ????$c = $init;
54. ????$k = 0;
55. ????$len = $length;
56. ????while($len >= 12) {
57. ????????$a += ($url[$k+0] +($url[$k+1]<<8) +($url[$k+2]<<16) +($url[$k+3]<<24));
58. ????????$b += ($url[$k+4] +($url[$k+5]<<8) +($url[$k+6]<<16) +($url[$k+7]<<24));
59. ????????$c += ($url[$k+8] +($url[$k+9]<<8) +($url[$k+10]<<16)+($url[$k+11]<<24));
60. ????????$mix = mix($a,$c);
61. ????????$a = $mix[0]; $b = $mix[1]; $c = $mix[2];
62. ????????$k += 12;???
63. ????????$len -= 12;
64. ????}
65. ???
66. ????$c += $length;
67. ????switch($len)??????????????/* all the case statements fall through */
68. ????{
69. ????????case 11: $c+=($url[$k+10]<<24);
70. ????????case 10: $c+=($url[$k+9]<<16);
71. ????????case 9 : $c+=($url[$k+8]<<8);
72. ??????????/* the first byte of c is reserved for the length */
73. ????????case 8 : $b+=($url[$k+7]<<24);
74. ????????case 7 : $b+=($url[$k+6]<<16);
75. ????????case 6 : $b+=($url[$k+5]<<8);
76. ????????case 5 : $b+=($url[$k+4]);
77. ????????case 4 : $a+=($url[$k+3]<<24);
78. ????????case 3 : $a+=($url[$k+2]<<16);
79. ????????case 2 : $a+=($url[$k+1]<<8);
80. ????????case 1 : $a+=($url[$k+0]);
81. ?????????/* case 0: nothing left to add */
82. ????}
83. ????$mix = mix($a,$c);
84. ????/*-------------------------------------------- report the result */
85. ????return $mix[2];
86. }
87. ???
88. //converts a string into an array of integers containing the numeric value of the char
89. function strord($string) {
90. ????for($i=0;$i<strlen($string);$i++) {
91. ????????$result[$i] = ord($string{$i});
92. ????}
93. ????return $result;
94. }
95. // http://www.example.com/ - Checksum: 6540747202
97. if (!isset($_GET['url']))
98. {
99. ????$url_o???= $_SERVER['HTTP_REFERER'];
100. }
101. else
102. {
103. ????$url_o???= $_GET['url'];
104. }
106. $url_o = explode("?",$url_o);
107. $url_o = $url_o[0];
109. $url????= 'info:'.$url_o;
110. $ch?????= GoogleCH(strord($url));
111. $url????='info:'.urlencode($url_o);
112. $cache_filename = "prcache/".urlencode($url_o).".pagerank";
113. // check exists of cache file,if not exists,create it
114. if(!file_exists($cache_filename) || (file_exists($cache_filename) && filemtime($cache_filename) < time() - 86400))
115. {
116. ????$url????= "http://toolbarqueries.google.com/search?client=navclient-auto&ch=6$ch&ie=UTF-8&oe=UTF-8&features=Rank&q=$url";
117. ????$result = @file_get_contents($url);
118. ????$tmp????= @explode(":",$result);
119. ????$rank???= intval($tmp[2]);
120. ????$handle = fopen ($cache_filename,"w");
121. ????flock($handle,LOCK_EX);
122. ????fwrite($handle,$rank);
123. ????flock($handle,LOCK_UN);
124. ????fclose($handle);
125. }
126. $pagerank = @file_get_contents($cache_filename);
127. $pagerank = 2;
128. $width = 6 * $pagerank;
129. $width_ = 6 * (10-$pagerank);
130. 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=""/imgs/bar.gif"" width=""$width"" height=""20""><img src=""/imgs/space.gif"" width=""$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="plugins/pagerank.php"></script>
完毕！

（编辑：李大同）

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