Get Remote IP Address in PHP

In case that you want to know the remote client IP address, you can simple get by referencing the global variables $_SERVER[‘REMOTE_ADDR’].

Following is the example to make function can get remote IP address.

  1: function getRemoteIPAddress() {

  2:     $ip = $_SERVER['REMOTE_ADDR'];

  3:     return $ip;

  4: }

But, the above function does not work correctly, if you are behind proxy server. In that case, below function to get real IP address of client.

  1: function getRealIPAddr()

  2: {

  3:     if (!empty($_SERVER['HTTP_CLIENT_IP']))   //check ip from share internet

  4:     {

  5:         $ip=$_SERVER['HTTP_CLIENT_IP'];

  6:     }

  7:     elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR']))   //to check ip is pass from proxy

  8:     {

  9:         $ip=$_SERVER['HTTP_X_FORWARDED_FOR'];

 10:     }

 11:     else

 12:     {

 13:         $ip=$_SERVER['REMOTE_ADDR'];

 14:     }

 15:     return $ip;

 16: }