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php gets user's real IP

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Release： 2016-07-25 08:45:14
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If the user uses a proxy server, the real IP is not in the HTTP_CLIENT_IP header, but needs to be parsed through the http header HTTP_X_FORWARDED_FOR.

The following php function:

  1. function GetIP() { //Get IP
  2. if ($_SERVER["HTTP_X_FORWARDED_FOR"])
  3. $ip = $_SERVER["HTTP_X_FORWARDED_FOR"];
  4. else if ( $_SERVER["HTTP_CLIENT_IP"])
  5. $ip = $_SERVER["HTTP_CLIENT_IP"];
  6. else if ($_SERVER["REMOTE_ADDR"])
  7. $ip = $_SERVER["REMOTE_ADDR"];
  8. else if (getenv( "HTTP_X_FORWARDED_FOR"))
  9. $ip = getenv("HTTP_X_FORWARDED_FOR");
  10. else if (getenv("HTTP_CLIENT_IP"))
  11. $ip = getenv("HTTP_CLIENT_IP");
  12. else if (getenv("REMOTE_ADDR"))
  13. $ip = getenv("REMOTE_ADDR");
  14. else
  15. $ip = "Unknown";
  16. return $ip;
  17. }
  18. ?>
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php获得用户的真实IP
source：php.cn
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