function getUserIP(){

  $client  = @$_SERVER['HTTP_CLIENT_IP'];

  $forward = @$_SERVER['HTTP_X_FORWARDED_FOR'];

  $remote  = $_SERVER['REMOTE_ADDR'];



  if(filter_var($client, FILTER_VALIDATE_IP)){

      $ip = $client;

  }

  elseif(filter_var($forward, FILTER_VALIDATE_IP)){

      $ip = $forward;

  }

  else{

      $ip = $remote;

  }

  return $ip;

}