64 lines
1.6 KiB
PHP
64 lines
1.6 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 file
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* 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 is_scalar;
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use function mb_strlen;
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use function preg_replace;
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/**
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* Validates a Brazilian driver's license.
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*
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* @author Gabriel Pedro <gpedro@users.noreply.github.com>
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* @author Henrique Moody <henriquemoody@gmail.com>
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* @author Kinn Coelho Julião <kinncj@gmail.com>
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* @author William Espindola <oi@williamespindola.com.br>
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*/
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final class Cnh 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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// Canonicalize input
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$input = (string) preg_replace('{\D}', '', (string) $input);
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// Validate length and invalid numbers
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if (mb_strlen($input) != 11 || ((int) $input === 0)) {
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return false;
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}
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// Validate check digits using a modulus 11 algorithm
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for ($c = $s1 = $s2 = 0, $p = 9; $c < 9; $c++, $p--) {
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$s1 += (int) $input[$c] * $p;
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$s2 += (int) $input[$c] * (10 - $p);
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}
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$dv1 = $s1 % 11;
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if ($input[9] != ($dv1 > 9) ? 0 : $dv1) {
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return false;
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}
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$dv2 = $s2 % 11 - ($dv1 > 9 ? 2 : 0);
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$check = $dv2 < 0 ? $dv2 + 11 : ($dv2 > 9 ? 0 : $dv2);
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return $input[10] == $check;
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}
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}
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