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Posted By

Ideandro on 03/02/11


Tagged

php ip address


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Ideandro


GetIPaddress

 / Published in: PHP
 

URL: http://stackoverflow.com/questions/1634782/what-is-the-most-accurate-way-to-retrieve-a-users-correct-ip-address-in-php

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  1. function GetIPaddress()
  2. {
  3.   foreach (array('HTTP_CLIENT_IP', 'HTTP_X_FORWARDED_FOR', 'HTTP_X_FORWARDED', 'HTTP_X_CLUSTER_CLIENT_IP', 'HTTP_FORWARDED_FOR', 'HTTP_FORWARDED', 'REMOTE_ADDR') as $key)
  4.   {
  5.     if (array_key_exists($key, $_SERVER) === true)
  6.     {
  7.       foreach (explode(',', $_SERVER[$key]) as $ip)
  8.       {
  9.         $ip = trim($ip); // just to be safe
  10.  
  11.         if (filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4 || FILTER_FLAG_IPV6 || FILTER_FLAG_NO_PRIV_RANGE || FILTER_FLAG_NO_RES_RANGE) !== false)
  12.         {
  13.           return $ip;
  14.         }
  15.       }
  16.     }
  17.   }
  18. }

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