function signup(){
  global $request;
  $request->enable_super_globals();
  if (isset($_POST["submit"])) {

    $username = $_POST["username"];
    $password = $_POST["password"];
    $email = $_POST["email"];

    $ip = $request->variable('REMOTE_ADDR', ''); // means we get user's IP address

    /*
    in case you want to get the real timezone the php way

    $json   = file_get_contents( 'http://smart-ip.net/geoip-json/' . $ip); // this one service we gonna use to obtain timezone by IP
    // maybe it's good to add some checks (if/else you've got an answer and if json could be decoded, etc.)
    $ipData = json_decode( $json, true);

    if ($ipData['timezone']) {
        $tz = new DateTimeZone( $ipData['timezone']);
        $now = new DateTime( 'now', $tz); // DateTime object corellated to user's timezone
    } else {
       // we can't determine a timezone - do something else...

    */

    $user_row = array(
    'username'              => $username,
    'user_password'         => phpbb_hash($password),
    'user_email'            => $email,
    'group_id'              => 2, // by default, the REGISTERED user group is id 2
    'user_timezone'         => (float) "UTC", // no idea if this works
    'user_lang'             => "eng",
    'user_type'             => USER_NORMAL, // why no "" ???
    'user_ip'               => $ip,
    'user_regdate'          => time(),
    );
    // Register user...
    $user_id = user_add($user_row);

    echo "<h1>Registered you now can log in</h1>";

  }
  else
    echo "Failed";
  $request->disable_super_globals();
}