ManaPHP\Http\Filter::_filter_float PHP Метод

    protected function _filter_float($value)
    {
        if (filter_var($value, FILTER_VALIDATE_FLOAT) !== false && preg_match('#^[+-]?[\\d\\.]+$#', $value) === 1) {
            return (double) $value;
        } else {
            return null;
        }
    }