갖은자를 변환하는 PHP 7.4+ 라이브러리( https://github.com/yks118/AmountLanguage )입니다.
https://manana.kr/amount-language
require_once '{YOUR LIB PATH}/AmountLanguage/autoload.php';
$amountLanguage = new \AmountLanguage\AmountLanguage();
/** @var \AmountLanguage\AmountLanguage $amountLanguage */
$amountLanguage->set(100000000);
/** @var \AmountLanguage\AmountLanguage $amountLanguage */
$amountLanguage->ko->setDecode('일억', 'hangul');
/** @var \AmountLanguage\AmountLanguage $amountLanguage */
$amountLanguage->ko->setDecode('壹億', 'hanja');
/** @var \AmountLanguage\AmountLanguage $amountLanguage */
$amountLanguage->ja->setDecode('壱億', 'kanji');
/** @var \AmountLanguage\AmountLanguage $amountLanguage */
echo $amountLanguage->get();
/** @var \AmountLanguage\AmountLanguage $amountLanguage */
echo $amountLanguage->ko->getEncode('hangul');
/** @var \AmountLanguage\AmountLanguage $amountLanguage */
echo $amountLanguage->ko->getEncode('hanja');
/** @var \AmountLanguage\AmountLanguage $amountLanguage */
echo $amountLanguage->ja->getEncode('kanji');