61 lines
1.5 KiB
PHP
61 lines
1.5 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 ord;
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use function preg_match;
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/**
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* Validates whether the input is a Polish identity card (Dowód Osobisty).
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*
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* @see https://en.wikipedia.org/wiki/Polish_identity_card
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*
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* @author Henrique Moody <henriquemoody@gmail.com>
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*/
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final class PolishIdCard extends AbstractRule
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{
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private const ASCII_CODE_0 = 48;
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private const ASCII_CODE_7 = 55;
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private const ASCII_CODE_9 = 57;
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private const ASCII_CODE_A = 65;
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/**
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* {@inheritDoc}
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*/
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public function validate($input): bool
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{
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if (!preg_match('/^[A-Z0-9]{9}$/', $input)) {
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return false;
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}
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$weights = [7, 3, 1, 0, 7, 3, 1, 7, 3];
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$weightedSum = 0;
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for ($i = 0; $i < 9; ++$i) {
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$code = ord($input[$i]);
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if ($i < 3 && $code <= self::ASCII_CODE_9) {
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return false;
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}
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if ($i > 2 && $code >= self::ASCII_CODE_A) {
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return false;
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}
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$difference = $code <= self::ASCII_CODE_9 ? self::ASCII_CODE_0 : self::ASCII_CODE_7;
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$weightedSum += ($code - $difference) * $weights[$i];
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}
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return $weightedSum % 10 == $input[3];
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}
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}
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