57 lines
1.3 KiB
PHP
57 lines
1.3 KiB
PHP
<?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 floor;
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use function mb_strlen;
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use function str_split;
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/**
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* Validates the access key of the Brazilian electronic invoice (NFe).
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*
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*
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* (pt-br) Valida chave de acesso de NFe, mais especificamente, relacionada ao DANFE.
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*
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* @see (pt-br) Manual de Integração do Contribuinte v4.0.1 em http://www.nfe.fazenda.gov.br
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*
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* @author Andrey Knupp Vital <andreykvital@gmail.com>
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* @author Danilo Correa <danilosilva87@gmail.com>
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* @author Henrique Moody <henriquemoody@gmail.com>
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*/
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final class NfeAccessKey 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($input): bool
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{
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if (mb_strlen($input) !== 44) {
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return false;
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}
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$digits = array_map('intval', str_split($input));
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$w = [];
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for ($i = 0, $z = 5, $m = 43; $i <= $m; ++$i) {
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$z = $i < $m ? $z - 1 == 1 ? 9 : $z - 1 : 0;
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$w[] = $z;
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}
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for ($i = 0, $s = 0, $k = 44; $i < $k; ++$i) {
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$s += $digits[$i] * $w[$i];
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}
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$s -= 11 * floor($s / 11);
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$v = $s == 0 || $s == 1 ? 0 : 11 - $s;
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return $v == $digits[43];
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}
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}
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