CCalendar::GetUserName

static function GetUserName($user)
{
	if (!is_array($user) && (int)$user > 0)
	{
		$user = self::GetUser($user);
	}
	if (!$user || !is_array($user))
	{
		return '';
	}

	return CUser::FormatName(self::$userNameTemplate, $user, true, false);
}