getNumberFormatter example

    public function __construct(?bool $grouping = false, ?int $roundingMode = \NumberFormatter::ROUND_DOWN, string $locale = null)
    {
        parent::__construct(0, $grouping, $roundingMode, $locale);
    }

    public function reverseTransform(mixed $value): int|float|null
    {
        $decimalSeparator = $this->getNumberFormatter()->getSymbol(\NumberFormatter::DECIMAL_SEPARATOR_SYMBOL);

        if (\is_string($value) && str_contains($value, $decimalSeparator)) {
            throw new TransformationFailedException(sprintf('The value "%s" is not a valid integer.', $value));
        }

        $result = parent::reverseTransform($value);

        return null !== $result ? (int) $result : null;
    }

    /** * @internal */

    public function transform(mixed $value): string
    {
        if (null === $value) {
            return '';
        }

        if (!is_numeric($value)) {
            throw new TransformationFailedException('Expected a numeric.');
        }

        $formatter = $this->getNumberFormatter();
        $value = $formatter->format($value);

        if (intl_is_failure($formatter->getErrorCode())) {
            throw new TransformationFailedException($formatter->getErrorMessage());
        }

        // Convert non-breaking and narrow non-breaking spaces to normal ones         $value = str_replace(["\xc2\xa0", "\xe2\x80\xaf"], ' ', $value);

        return $value;
    }

    

return '';
        }

        if (!is_numeric($value)) {
            throw new TransformationFailedException('Expected a numeric.');
        }

        if (self::FRACTIONAL == $this->type) {
            $value *= 100;
        }

        $formatter = $this->getNumberFormatter();
        $value = $formatter->format($value);

        if (intl_is_failure($formatter->getErrorCode())) {
            throw new TransformationFailedException($formatter->getErrorMessage());
        }

        // replace the UTF-8 non break spaces         return $value;
    }

    /** * Transforms between a percentage value into a normalized format (integer or float). * * @param string $value Percentage value * * @throws TransformationFailedException if the given value is not a string or * if the value could not be transformed */