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Posted By

haozi on 05/11/08


Tagged

php textmate


Versions (?)


get_client_ip

Published in: Other 

Plain TextExpand 
  1. function get_client_ip()
  2. {
  3.     static $realip = NULL;
  4.  
  5.     if ($realip !== NULL)
  6.     {
  7.         return $realip;
  8.     }
  9.  
  10.     if (isset($_SERVER))
  11.     {
  12.         if (isset($_SERVER['HTTP_X_FORWARDED_FOR']))
  13.         {
  14.             $arr = explode(',', $_SERVER['HTTP_X_FORWARDED_FOR']);
  15.  
  16.             /* 取X-Forwarded-For中第一个非unknown的有效IP字符串 */
  17.             foreach ($arr AS $ip)
  18.             {
  19.                 $ip = trim($ip);
  20.  
  21.                 if ($ip != 'unknown')
  22.                 {
  23.                     $realip = $ip;
  24.  
  25.                     break;
  26.                 }
  27.             }
  28.         }
  29.         elseif (isset($_SERVER['HTTP_CLIENT_IP']))
  30.         {
  31.             $realip = $_SERVER['HTTP_CLIENT_IP'];
  32.         }
  33.         else
  34.         {
  35.             if (isset($_SERVER['REMOTE_ADDR']))
  36.             {
  37.                 $realip = $_SERVER['REMOTE_ADDR'];
  38.             }
  39.             else
  40.             {
  41.                 $realip = '0.0.0.0';
  42.             }
  43.         }
  44.     }
  45.     else
  46.     {
  47.         if (getenv('HTTP_X_FORWARDED_FOR'))
  48.         {
  49.             $realip = getenv('HTTP_X_FORWARDED_FOR');
  50.         }
  51.         elseif (getenv('HTTP_CLIENT_IP'))
  52.         {
  53.             $realip = getenv('HTTP_CLIENT_IP');
  54.         }
  55.         else
  56.         {
  57.             $realip = getenv('REMOTE_ADDR');
  58.         }
  59.     }
  60.  
  61.     preg_match("/[d.]{7,15}/", $realip, $onlineip);
  62.     $realip = !empty($onlineip[0]) ? $onlineip[0] : '0.0.0.0';
  63.  
  64.     return $realip;
  65. }

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Posted By: coldpeer on May 11, 2008

Why it's in Other category rather than PHP? (http://snipplr.com/all/language/php)

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