DragonBe\Vies\Validator\ValidatorEE::validate PHP Method

    public function validate($vatNumber)
    {
        if (strlen($vatNumber) != 9) {
            return false;
        }
        $weights = array(3, 7, 1, 3, 7, 1, 3, 7);
        $checksum = (int) $vatNumber[8];
        $checkval = $this->sumWeights($weights, $vatNumber);
        $checkval = ceil($checkval / 10) * 10 - $checkval;
        if ($checkval != $checksum) {
            return false;
        }
        return true;
    }