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

    public function validate($vatNumber)
    {
        if (strlen($vatNumber) != 9) {
            return false;
        }
        $checksum = $vatNumber[8];
        $weights = array(256, 128, 64, 32, 16, 8, 4, 2);
        $checkval = $this->sumWeights($weights, $vatNumber);
        $checkval = $checkval % 11 > 9 ? 0 : $checkval % 11;
        if ($checkval != $checksum) {
            return false;
        }
        return true;
    }