PHP 根据IP地址获取所在城市

发布时间：2017-09-23 18:17:08编辑：丝画阁阅读（798）

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.     preg_match('#\{.+?\}#', $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'] = $ip;  
50.         unset($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);