src/Vies/Validator/ValidatorPT.php
<?php
declare (strict_types=1);
/**
* \DragonBe\Vies
*
* @author Paweł Krzaczkowski <krzaczek+github@gmail.com>
* @license MIT
*/
namespace DragonBe\Vies\Validator;
/**
* Class ValidatorPT
* @package DragonBe\Vies\Validator
*
* VAT format: [C1 C2 C3 C4 C5 C6 C7 C8 C9]
*
* Range:
* C1 > 0
*
* Rules:
* C9
* R = 11 – (9*C1 + 8*C2 + 7*C3 + 6*C4 + 5*C5 + 4*C6 + 3*C7 + 2*C8) modulo 11
* If R= 10 or R= 11, Then R = 0
* C9 = R
*/
class ValidatorPT extends ValidatorAbstract
{
/**
* {@inheritdoc}
*/
public function validate(string $vatNumber): bool
{
if (strlen($vatNumber) != 9) {
return false;
}
$checksum = (int)$vatNumber[8];
$weights = [9, 8, 7, 6, 5, 4, 3, 2];
$checkVal = $this->sumWeights($weights, $vatNumber);
$checkVal = (11 - ($checkVal % 11)) > 9 ? 0 : (11 - ($checkVal % 11));
return $checksum == $checkVal;
}
}