PHP获取访问者IP地址

获取访问者IP地址

[PHP]代码

1. static public function getip()
2. {
3. if (getenv("HTTP_CLIENT_IP") && strcasecmp(getenv("HTTP_CLIENT_IP"), "unknown"))
4. {
5. $ip = getenv("HTTP_CLIENT_IP");
6. }
7. else if (getenv("HTTP_X_FORWARDED_FOR") && strcasecmp(getenv("HTTP_X_FORWARDED_FOR"), "unknown"))
8. {
9. $ip = getenv("HTTP_X_FORWARDED_FOR");
10. }
11. else if (getenv("REMOTE_ADDR") && strcasecmp(getenv("REMOTE_ADDR"), "unknown"))
12. {
13. $ip = getenv("REMOTE_ADDR");
14. }
15. else if (isset($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], "unknown"))
16. {
17. $ip = $_SERVER['REMOTE_ADDR'];
18. }
19. else
20. {
21. $ip = "";
22. }
23. return($ip);
24. }