FloatConverter.php

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<?php
namespace TYPO3\CMS\Extbase\Property\TypeConverter;

/*                                                                        *
 * This script belongs to the Extbase framework                           *
 *                                                                        *
 * It is free software; you can redistribute it and/or modify it under    *
 * the terms of the GNU Lesser General Public License as published by the *
 * Free Software Foundation, either version 3 of the License, or (at your *
 * option) any later version.                                             *
 *                                                                        *
 * This script is distributed in the hope that it will be useful, but     *
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHAN-    *
 * TABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser       *
 * General Public License for more details.                               *
 *                                                                        *
 * You should have received a copy of the GNU Lesser General Public       *
 * License along with the script.                                         *
 * If not, see http://www.gnu.org/licenses/lgpl.html                      *
 *                                                                        *
 * The TYPO3 project - inspiring people to share!                         *
 *                                                                        */
class FloatConverter extends \TYPO3\CMS\Extbase\Property\TypeConverter\AbstractTypeConverter
{
    const CONFIGURATION_THOUSANDS_SEPARATOR = 'thousandsSeparator';

    const CONFIGURATION_DECIMAL_POINT = 'decimalPoint';

    protected $sourceTypes = ['float', 'integer', 'string'];

    protected $targetType = 'float';

    protected $priority = 10;

    public function convertFrom($source, $targetType, array $convertedChildProperties = [], \TYPO3\CMS\Extbase\Property\PropertyMappingConfigurationInterface $configuration = null)
    {
        if ($source === null || (string)$source === '') {
            return null;
        }

        // We won't backport the full flavored locale parsing of floats from Flow here

        if (is_string($source) && $configuration !== null) {
            $thousandsSeparator = $configuration->getConfigurationValue(self::class, self::CONFIGURATION_THOUSANDS_SEPARATOR);
            $decimalPoint = $configuration->getConfigurationValue(self::class, self::CONFIGURATION_DECIMAL_POINT);
            $source = str_replace($thousandsSeparator, '', $source);
            $source = str_replace($decimalPoint, '.', $source);
        }

        if (!is_numeric($source)) {
            return new \TYPO3\CMS\Extbase\Error\Error('"%s" cannot be converted to a float value.', 1332934124, [$source]);
        }
        return (float)$source;
    }
}