PHP 最快PR查询代码

我见过的最快的PR查询代码，不过至今没看懂 :)
速度很不错

1. 
   
2. define(’GOOGLE_MAGIC’, 0xE6359A60);
   
3. class pageRank{
   
4. var $pr;
   
5. function zeroFill($a, $b){
   
6. $z = hexdec(80000000);
   
7. if ($z & $a){
   
8. $a = ($a>>1);
   
9. $a &= (~$z);
   
10. $a |= 0×40000000;
    
11. $a = ($a>>($b-1));
    
12. }else{
    
13. $a = ($a>>$b);
    
14. }
    
15. return $a;
    
16. }
    
17. function mix($a,$b,$c) {
    
18. $a -= $b; $a -= $c; $a ^= ($this->zeroFill($c,13));
    
19. $b -= $c; $b -= $a; $b ^= ($a<<8);
    
20. $c -= $a; $c -= $b; $c ^= ($this->zeroFill($b,13));
    
21. $a -= $b; $a -= $c; $a ^= ($this->zeroFill($c,12));
    
22. $b -= $c; $b -= $a; $b ^= ($a<<16);
    
23. $c -= $a; $c -= $b; $c ^= ($this->zeroFill($b,5));
    
24. $a -= $b; $a -= $c; $a ^= ($this->zeroFill($c,3));
    
25. $b -= $c; $b -= $a; $b ^= ($a<<10);
    
26. $c -= $a; $c -= $b; $c ^= ($this->zeroFill($b,15));
    
27. return array($a,$b,$c);
    
28. }
    
29. function GoogleCH($url, $length=null, $init=GOOGLE_MAGIC) {
    
30. if(is_null($length)) {
    
31. $length = sizeof($url);
    
32. }
    
33. $a = $b = 0×9E3779B9;
    
34. $c = $init;
    
35. $k = 0;
    
36. $len = $length;
    
37. while($len >= 12) {
    
38. $a += ($url[$k+0] +($url[$k+1]<<8) +($url[$k+2]<<16) +($url[$k+3]<<24));
    
39. $b += ($url[$k+4] +($url[$k+5]<<8) +($url[$k+6]<<16) +($url[$k+7]<<24));
    
40. $c += ($url[$k+8] +($url[$k+9]<<8) +($url[$k+10]<<16)+($url[$k+11]<<24));
    
41. $mix = $this->mix($a,$b,$c);
    
42. $a = $mix[0]; $b = $mix[1]; $c = $mix[2];
    
43. $k += 12;
    
44. $len -= 12;
    
45. }
    
46. $c += $length;
    
47. switch($len){
    
48. case 11: $c+=($url[$k+10]<<24);
    
49. case 10: $c+=($url[$k+9]<<16);
    
50. case 9 : $c+=($url[$k+8]<<8);
    
51. /* the first byte of c is reserved for the length */
    
52. case 8 : $b+=($url[$k+7]<<24);
    
53. case 7 : $b+=($url[$k+6]<<16);
    
54. case 6 : $b+=($url[$k+5]<<8);
    
55. case 5 : $b+=($url[$k+4]);
    
56. case 4 : $a+=($url[$k+3]<<24);
    
57. case 3 : $a+=($url[$k+2]<<16);
    
58. case 2 : $a+=($url[$k+1]<<8);
    
59. case 1 : $a+=($url[$k+0]);
    
60. }
    
61. $mix = $this->mix($a,$b,$c);
    
62. /* report the result */
    
63. return $mix[2];
    
64. }
    
65. //converts a string into an array of integers containing the numeric value of the char
    
66. function strord($string) {
    
67. for($i=0;$i
    
68. $result[$i] = ord($string{$i});
    
69. }
    
70. return $result;
    
71. }
    
72. function printrank($url){
    
73. $ch = “6″.$this->GoogleCH($this->strord(”info:” . $url));
    
74. $fp = fsockopen(”[url]www.google.com[/url]”, 80, $errno, $errstr, 30);
    
75. if (!$fp) {
    
76. echo “$errstr ($errno)
    
77. \\n”;
    
78. } else {
    
79. // $out = “GET /search?client=yaoshchclient-auto&ch=” . $ch . “&features=Rank&q=info:” . $url . ” HTTP/1.1\\r\\n” ;
    
80. $out = “GET /search?client=navclient-auto&ch=” . $ch . “&features=Rank&q=info:” . $url . ” HTTP/1.1\\r\\n” ;
    
81. $out .= “Host: [url]www.google.com[/url]\\r\\n” ;
    
82. $out .= “Connection: Close\\r\\n\\r\\n” ;
    
83. fwrite($fp, $out);
    
84. while (!feof($fp)) {
    
85. $data = fgets($fp, 128);
    
86. $pos = strpos($data, “Rank_”);
    
87. if($pos === false){
    
88. }else{
    
89. $pagerank = substr($data, $pos + 9);
    
90. // $this->pr_image($pagerank);
    
91. }
    
92. }
    
93. // fclose($fp);
    
94. if(!isset($pagerank))
    
95. {
    
96. return “0″;
    
97. }
    
98. else if(empty($pagerank))
    
99. {
    
100. return “0″;
     
101. }
     
102. else
     
103. {
     
104. return $pagerank;
     
105. }
     
106. }
     
107. }
     
108. }
     
109. ?>
     

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调用方法PHP的

1. $gpr = new pageRank();
   
2. $pr = $gpr->printrank($url);
   
3. $cache->saveCache($pr, $url);
   
4. return $pr;
   

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好耶！功能强大啊

这个要顶起来啊