PHP获取用户访问IP，获取客户端IP

1. <?php
2. if ($HTTP_SERVER_VARS["HTTP_X_FORWARDED_FOR"])
3. {
4. $ip = $HTTP_SERVER_VARS["HTTP_X_FORWARDED_FOR"];
5. }
6. elseif ($HTTP_SERVER_VARS["HTTP_CLIENT_IP"])
7. {
8. $ip = $HTTP_SERVER_VARS["HTTP_CLIENT_IP"];
9. }
10. elseif ($HTTP_SERVER_VARS["REMOTE_ADDR"])
11. {
12. $ip = $HTTP_SERVER_VARS["REMOTE_ADDR"];
13. }
14. elseif (getenv("HTTP_X_FORWARDED_FOR"))
15. {
16. $ip = getenv("HTTP_X_FORWARDED_FOR");
17. }
18. elseif (getenv("HTTP_CLIENT_IP"))
19. {
20. $ip = getenv("HTTP_CLIENT_IP");
21. }
22. elseif (getenv("REMOTE_ADDR"))
23. {
24. $ip = getenv("REMOTE_ADDR");
25. }
26. else
27. {
28. $ip = "Unknown";
29. }
30. echo "你的IP:".$ip ;
31. ?>
32. function getip() {
33. $unknown = 'unknown';
34. if ( isset($_SERVER['HTTP_X_FORWARDED_FOR']) && $_SERVER['HTTP_X_FORWARDED_FOR'] && strcasecmp($_SERVER['HTTP_X_FORWARDED_FOR'], $unknown) ) {
35. $ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
36. } elseif ( isset($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], $unknown) ) {
37. $ip = $_SERVER['REMOTE_ADDR'];
38. }
39. /*
40. 处理多层代理的情况
41. 或者使用正则方式：$ip = preg_match("/[\d\.]{7,15}/", $ip, $matches) ? $matches[0] : $unknown;
42. */
43. if (false !== strpos($ip, ','))
44. $ip = reset(explode(',', $ip));
45. return $ip;
46. }
47. $iipp=$_SERVER["REMOTE_ADDR"];
48. echo $iipp;