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技术文章  >  后端开发 > php教程

php获取网站的google pr值

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2016-07-25 08:57:50 883浏览
  2. /**
  3. * php代码取得网站的PR值
  4. * by bbs.it-home.org
  5. */
  6. $googlehost="toolbarqueries.google.com";
  7. $googleua="Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.0.6) Gecko/20060728 Firefox/1.5";
  8. echo getpr('http://bbs.it-home.org');
  9. //convert a string to a 32-bit integer
  10. function StrToNum($Str, $Check, $Magic) {
  11. $Int32Unit = 4294967296; // 2^32
  12. $length = strlen($Str);
  13. for ($i = 0; $i $Check *= $Magic;
  14. //If the float is beyond the boundaries of integer (usually +/- 2.15e+9 = 2^31),
  15. // the result of converting to integer is undefined
  16. // refer to http://www.php.net/manual/en/language.types.integer.php
  17. if ($Check >= $Int32Unit) {
  18. $Check = ($Check - $Int32Unit * (int) ($Check / $Int32Unit));
  19. //if the check less than -2^31
  20. $Check = ($Check }
  21. $Check += ord($Str{$i});
  22. }
  23. return $Check;
  24. }
  25. //genearate a hash for a url
  26. function HashURL($String) {
  27. $Check1 = StrToNum($String, 0×1505, 0×21);
  28. $Check2 = StrToNum($String, 0, 0×1003F);
  29. $Check1 >>= 2;
  30. $Check1 = (($Check1 >> 4) & 0×3FFFFC0 ) | ($Check1 & 0×3F);
  31. $Check1 = (($Check1 >> 4) & 0×3FFC00 ) | ($Check1 & 0×3FF);
  32. $Check1 = (($Check1 >> 4) & 0×3C000 ) | ($Check1 & 0×3FFF);
  33. $T1 = (((($Check1 & 0×3C0) $T2 = (((($Check1 & 0xFFFFC000) return ($T1 | $T2);
  34. }
  35. //genearate a checksum for the hash string
  36. function CheckHash($Hashnum) {
  37. $CheckByte = 0;
  38. $Flag = 0;
  39. $HashStr = sprintf(‘%u’, $Hashnum) ;
  40. $length = strlen($HashStr);
  41. for ($i = $length - 1; $i >= 0; $i –) {
  42. $Re = $HashStr{$i};
  43. if (1 === ($Flag % 2)) {
  44. $Re += $Re;
  45. $Re = (int)($Re / 10) + ($Re % 10);
  46. }
  47. $CheckByte += $Re;
  48. $Flag ++;
  49. }
  50. $CheckByte %= 10;
  51. if (0 !== $CheckByte) {
  52. $CheckByte = 10 - $CheckByte;
  53. if (1 === ($Flag % 2) ) {
  54. if (1 === ($CheckByte % 2)) {
  55. $CheckByte += 9;
  56. }
  57. $CheckByte >>= 1;
  58. }
  59. }
  60. return "7".$CheckByte.$HashStr;
  61. }
  62. //return the pagerank checksum hash
  63. function getch($url) { return CheckHash(HashURL($url)); }
  64. //return the pagerank figure
  65. function getpr($url) {
  66. global $googlehost,$googleua;
  67. $pr = 0; // default return
  68. $ch = getch($url);
  69. $fp = fsockopen($googlehost, 80, $errno, $errstr, 30);
  70. if ($fp) {
  71. $out = "GET /search?client=navclient-auto&ch=$ch&features=Rank&q=info:$url HTTP/1.1\r\n";
  72. //echo “
    $out
    \n”; //debug only
  73. $out .= “User-Agent: $googleua\r\n”;
  74. $out .= “Host: $googlehost\r\n”;
  75. $out .= “Connection: Close\r\n\r\n”;
  76. fwrite($fp, $out);
  77. //$pagerank = substr(fgets($fp, 128), 4); //debug only
  78. //echo $pagerank; //debug only
  79. while (!feof($fp)) {
  80. $data = fgets($fp, 128);
  81. //echo $data;
  82. $pos = strpos($data, “Rank_”);
  83. if($pos === false){} else{
  84. $pr=substr($data, $pos + 9);
  85. $pr=trim($pr);
  86. $pr=str_replace(“\n”,”,$pr);
  87. return $pr;
  88. }
  89. }
  90. //else { echo “$errstr ($errno) \n”; } //debug only
  91. fclose($fp);
  92. }
  93. return $pr;
  94. }
  95. ?>
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