Overtrue\Validation\Validator::replaceBefore PHP Method

    protected function replaceBefore($message, $attribute, $rule, $parameters)
    {
        if (!strtotime($parameters[0])) {
            return str_replace(':date', $this->getAttribute($parameters[0]), $message);
        } else {
            return str_replace(':date', $parameters[0], $message);
        }
    }