gistfile1.txt

<?php
namespace App\Form\Type;
use Money\Currencies\ISOCurrencies;
use Money\Currency;
use Money\Formatter\DecimalMoneyFormatter;
use Money\Parser\DecimalMoneyParser;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\Extension\Core\Type\MoneyType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\Form\CallbackTransformer;
class AmountType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder->addModelTransformer(new CallbackTransformer(
            function ($form) {
                $currencies = new ISOCurrencies();
                $moneyFormatter = new DecimalMoneyFormatter($currencies);
                return $moneyFormatter->format($form['amount']);
            },
            function ($form) {
                $currency = new Currency('CHF');
                $currencies = new ISOCurrencies();
                $moneyParser = new DecimalMoneyParser($currencies);
                return $moneyParser->parse(strval($form), $currency);
            }
        ));
    }
    public function getParent()
    {
        return MoneyType::class;
    }
}