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

    public function validate($vatNumber)
    {
        if (strlen($vatNumber) != 8) {
            return false;
        }
        $checksum = (int) $vatNumber[7];
        $weights = array(7, 9, 10, 5, 8, 4, 2);
        $checkval = $this->sumWeights($weights, $vatNumber);
        if (11 - $checkval % 11 != $checksum) {
            return false;
        }
        return true;
    }