48 lines
1.2 KiB
PHP
48 lines
1.2 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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namespace Respect\Validation\Rules;
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class Cnh extends AbstractRule
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{
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public function validate($input)
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{
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if (!is_scalar($input)) {
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return false;
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}
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// Canonicalize input
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$input = preg_replace('{\D}', '', (string) $input);
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// Validate length and invalid numbers
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if ((strlen($input) != 11) || (intval($input) == 0)) {
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return false;
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}
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// Validate check digits using a modulus 11 algorithm
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for ($c = $s1 = $s2 = 0, $p = 9; $c < 9; $c++, $p--) {
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$s1 += intval($input[$c]) * $p;
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$s2 += intval($input[$c]) * (10 - $p);
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}
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if ($input[9] != (($dv1 = $s1 % 11) > 9) ? 0 : $dv1) {
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return false;
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}
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if ($input[10] != (((($dv2 = ($s2 % 11) - (($dv1 > 9) ? 2 : 0)) < 0)
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? $dv2 + 11 : $dv2) > 9) ? 0 : $dv2) {
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return false;
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}
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return true;
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}
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}
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