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

    public function validate($vatNumber)
    {
        if (strlen($vatNumber) != 8) {
            return false;
        }
        $weights = array(9, 7, 3, 1, 9, 7, 3);
        $checksum = (int) $vatNumber[7];
        $checkval = $this->sumWeights($weights, $vatNumber);
        $checkval = (int) substr($checkval, -1);
        $checkval = $checkval > 0 ? 10 - $checkval : 0;
        if ($checksum != $checkval) {
            return false;
        }
        return true;
    }