CIntranetInviteDialog::checkUserId

static function checkUserId($userId = 0)
{
	if ($userId <= 0)
	{
		return false;
	}

	$dbUser = CUser::GetByID($userId);
	$arUser = $dbUser->Fetch();
	if (!$arUser)
	{
		return false;
	}

	return $arUser;
}