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https://github.com/Respect/Validation.git
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59 lines
1.4 KiB
PHP
59 lines
1.4 KiB
PHP
<?php
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/*
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* This file is part of Respect/Validation.
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*
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* (c) Alexandre Gomes Gaigalas <alexandre@gaigalas.net>
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*
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* For the full copyright and license information, please view the "LICENSE.md"
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* file that was distributed with this source code.
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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 str_split;
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/**
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* Rule restrict to Brasil.
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*
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* Valida chave de acesso de NFe.
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* Mais especificamente, relacionada ao DANFE.
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*
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* @author Andrey Knupp Vital <andreykvital@gmail.com>
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* @author Henrique Moody <henriquemoody@gmail.com>
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*/
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class NfeAccessKey extends AbstractRule
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{
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/**
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* @see Manual de Integração do Contribuinte v4.0.1 (http://www.nfe.fazenda.gov.br)
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*
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* @param string $input access key
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*
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* @return bool
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*/
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public function validate($input): bool
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{
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if (44 !== mb_strlen($input)) {
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return false;
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}
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$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 < $m) ? 1 == ($z - 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 = (0 == $s || 1 == $s) ? 0 : (11 - $s);
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return $v == $digits[43];
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}
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}
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