Jyxo\Mail\Sender::changeCharset PHP Метод

    private function changeCharset(string $string) : string
    {
        if ('utf-8' !== $this->charset) {
            // Triggers a notice on an invalid character
            $string = @iconv('utf-8', $this->charset . '//TRANSLIT', $string);
            if ($string === false) {
                $string = '';
            }
        }
        return $string;
    }