1. function isIE6() {
2. $userAgent = strtolower($_SERVER["HTTP_USER_AGENT"]);
3. //从HTTP_USER_AGENT字段中获取用户浏览器信息
4. if (ereg("msie 6", $userAgent) || ereg("msie 5", $userAgent)) {
5. return true;
6. }
7. return false;
8. }

完整点的实例代码如下:

1. function userBrowser(){
2. $user_OSagent = $_SERVER['HTTP_USER_AGENT'];
3. if(strpos($user_OSagent,"Maxthon") && strpos($user_OSagent,"MSIE")) {
4. $visitor_browser ="Maxthon(Microsoft IE)";
5. }elseif(strpos($user_OSagent,"Maxthon 2.0")) {
6. $visitor_browser ="Maxthon 2.0";
7. }elseif(strpos($user_OSagent,"Maxthon")) {
8. $visitor_browser ="Maxthon";
9. }elseif(strpos($user_OSagent,"MSIE 9.0")) {
10. $visitor_browser ="MSIE 9.0";
11. }elseif(strpos($user_OSagent,"MSIE 8.0")) {
12. $visitor_browser ="MSIE 8.0";
13. }elseif(strpos($user_OSagent,"MSIE 7.0")) {
14. $visitor_browser ="MSIE 7.0";
15. }elseif(strpos($user_OSagent,"MSIE 6.0")) {
16. $visitor_browser ="MSIE 6.0";
17. } elseif(strpos($user_OSagent,"MSIE 5.5")) {
18. $visitor_browser ="MSIE 5.5";
19. } elseif(strpos($user_OSagent,"MSIE 5.0")) {
20. $visitor_browser ="MSIE 5.0";
21. } elseif(strpos($user_OSagent,"MSIE 4.01")) {
22. $visitor_browser ="MSIE 4.01";
23. }elseif(strpos($user_OSagent,"MSIE")) {
24. $visitor_browser ="MSIE 较高版本";
25. }elseif(strpos($user_OSagent,"NetCaptor")) {
26. $visitor_browser ="NetCaptor";
27. } elseif(strpos($user_OSagent,"Netscape")) {
28. $visitor_browser ="Netscape";
29. }elseif(strpos($user_OSagent,"Chrome")) {
30. $visitor_browser ="Chrome";
31. } elseif(strpos($user_OSagent,"Lynx")) {
32. $visitor_browser ="Lynx";
33. } elseif(strpos($user_OSagent,"Opera")) {
34. $visitor_browser ="Opera";
35. } elseif(strpos($user_OSagent,"Konqueror")) {
36. $visitor_browser ="Konqueror";
37. } elseif(strpos($user_OSagent,"Mozilla/5.0")) {
38. $visitor_browser ="Mozilla";
39. } elseif(strpos($user_OSagent,"Firefox")) {
40. $visitor_browser ="Firefox";
41. }elseif(strpos($user_OSagent,"U")) {
42. $visitor_browser ="Firefox";
43. } else {
44. $visitor_browser ="其它";
45. }
46. return $visitor_browser;
47. }