检测useragent版本

检测注流浏览器及其版本

2. define('IE', 1);
3. define('FIREFOX', 2);
4. define('CHROME', 3);
5. define('OPERA', 4);
6. class UserAgentDetect
7. {
8. static $version = array();
10. static $userAgent = '';
12. static function getUserAgent()
13. {
14. $header = getallheaders();
15. self :: $userAgent = $header['User-Agent'];
16. }
17. function findUserAgentByKey($ua, $key)
18. {
19. $len = strlen($key);
20. $start = strpos($ua, $key);
22. $pos = strpos($ua, ' ', $start + $len + 1);
24. return substr($ua, $start + $len, $pos - $len - $start);
25. }
26. static function detectUserAgent()
27. {
28. self :: getUserAgent();
30. if (strpos(self :: $userAgent, 'MSIE') != null)
31. {
32. self :: $version[] = IE;
33. self :: $version[] =self:: findUserAgentByKey(self :: $userAgent, 'MSIE');
34. }
35. else if (strpos(self :: $userAgent, 'Gecko/') != null)
36. {
38. self :: $version[] = FIREFOX;
39. self :: $version[] =self:: findUserAgentByKey(self :: $userAgent, 'Firefox/');
40. }
41. else if (strpos(self :: $userAgent, 'AppleWebKit/') != null)
42. {
43. self :: $version[] = CHROME;
44. self :: $version[] = self:: findUserAgentByKey(self :: $userAgent, 'Chrome/');
45. }
46. else if (strpos(self :: $userAgent, 'Presto/') != null)
47. {
48. self :: $version[] = OPERA;
49. self :: $version[] = self:: findUserAgentByKey(self :: $userAgent, 'Opera/');
50. }
51. else
52. {
53. }
55. return self :: $version;
56. }
59. function matchUserAgent($ua, $key)
60. {
61. preg_match("/$key.([^\s]*?)\s/", $ua, $out);
63. return $out[1];
64. }
65. }
66. $ua=UserAgentDetect::detectUserAgent();
68. print_r($ua);

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