1. <?php
2. header('Content-Type:text/html;Charset=utf-8');
3. function GetIp(){
4. $realip = '';
5. $unknown = 'unknown';
6. if (isset($_SERVER)){
7. if(isset($_SERVER['HTTP_X_FORWARDED_FOR']) && !empty($_SERVER['HTTP_X_FORWARDED_FOR']) && strcasecmp($_SERVER['HTTP_X_FORWARDED_FOR'], $unknown)){
8. $arr = explode(',', $_SERVER['HTTP_X_FORWARDED_FOR']);
9. foreach($arr as $ip){
10. $ip = trim($ip);
11. if ($ip != 'unknown'){
12. $realip = $ip;
13. break;
14. }
15. }
16. else if(isset($_SERVER['HTTP_CLIENT_IP']) && !empty($_SERVER['HTTP_CLIENT_IP']) && strcasecmp($_SERVER['HTTP_CLIENT_IP'], $unknown)){
17. $realip = $_SERVER['HTTP_CLIENT_IP'];
18. else if(isset($_SERVER['REMOTE_ADDR']) && !empty($_SERVER['REMOTE_ADDR']) && strcasecmp($_SERVER['REMOTE_ADDR'], $unknown)){
19. $realip = $_SERVER['REMOTE_ADDR'];
20. else{
21. $realip = $unknown;
22. }
23. else{
24. if(getenv('HTTP_X_FORWARDED_FOR') && strcasecmp(getenv('HTTP_X_FORWARDED_FOR'), $unknown)){
25. $realip = getenv("HTTP_X_FORWARDED_FOR");
26. else if(getenv('HTTP_CLIENT_IP') && strcasecmp(getenv('HTTP_CLIENT_IP'), $unknown)){
27. $realip = getenv("HTTP_CLIENT_IP");
28. else if(getenv('REMOTE_ADDR') && strcasecmp(getenv('REMOTE_ADDR'), $unknown)){
29. $realip = getenv("REMOTE_ADDR");
30. else{
31. $realip = $unknown;
32. }
33. }
34. $realip = preg_match("/[\d\.]{7,15}/", $realip, $matches) ? $matches[0] : $unknown;
35. return $realip;
36. }
37. 
38. function GetIpLookup($ip = ''){
39. if(empty($ip)){
40. $ip = GetIp();
41. }
42. $res = @file_get_contents('http://int.dpool.sina.com.cn/iplookup/iplookup.php?format=js&ip=' . $ip);
43. if(empty($res)){ return false; }
44. $jsonMatches = array();
45. '#\{.+?\}#', $res, $jsonMatches);
46. if(!isset($jsonMatches[0])){ return false; }
47. $json = json_decode($jsonMatches[0], true);
48. if(isset($json['ret']) && $json['ret'] == 1){
49. $json['ip'] = $ip;
50. $json['ret']);
51. else{
52. return false;
53. }
54. return $json;
55. }
56. 
57. 
58. $ipInfos = GetIpLookup('123.125.114.144'); //baidu.com IP地址
59. var_dump($ipInfos);