55 lines
1.2 KiB
PHP
55 lines
1.2 KiB
PHP
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<?php
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/*
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* Copyright (c) Alexandre Gomes Gaigalas <alganet@gmail.com>
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* SPDX-License-Identifier: MIT
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*/
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declare(strict_types=1);
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namespace Respect\Validation\Rules;
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use function array_map;
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use function is_scalar;
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use function preg_match;
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use function str_split;
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/**
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* Validates whether the input is a Polish VAT identification number (NIP).
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*
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* @see https://en.wikipedia.org/wiki/VAT_identification_number
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*
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* @author Henrique Moody <henriquemoody@gmail.com>
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* @author Tomasz Regdos <tomek@regdos.com>
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*/
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final class Nip extends AbstractRule
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{
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/**
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* {@inheritDoc}
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*/
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public function validate($input): bool
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{
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if (!is_scalar($input)) {
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return false;
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}
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if (!preg_match('/^\d{10}$/', (string) $input)) {
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return false;
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}
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$weights = [6, 5, 7, 2, 3, 4, 5, 6, 7];
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$digits = array_map('intval', str_split((string) $input));
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$targetControlNumber = $digits[9];
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$calculateControlNumber = 0;
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for ($i = 0; $i < 9; ++$i) {
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$calculateControlNumber += $digits[$i] * $weights[$i];
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}
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$calculateControlNumber = $calculateControlNumber % 11;
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return $targetControlNumber == $calculateControlNumber;
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}
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}
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