if   (isset($_SERVER["HTTP_X_FORWARDED_FOR"]))     
  {   
  $realip   =   $_SERVER["HTTP_X_FORWARDED_FOR"];   
  }   
  elseif   (isset($_SERVER["HTTP_CLIENT_IP"]))     
  {   
  $realip   =   $_SERVER["HTTP_CLIENT_IP"];   
  }   
  else     
  {   
  $realip   =   $_SERVER["REMOTE_ADDR"];   
  }