Longman\TelegramBot\Telegram::ucfirstUnicode PHP Méthode

    protected function ucfirstUnicode($str, $encoding = 'UTF-8')
    {
        return mb_strtoupper(mb_substr($str, 0, 1, $encoding), $encoding) . mb_strtolower(mb_substr($str, 1, mb_strlen($str), $encoding), $encoding);
    }