84 lines
1.9 KiB
PHP
84 lines
1.9 KiB
PHP
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<?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 array_sum;
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use function count;
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use function is_scalar;
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use function preg_replace;
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use function str_split;
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/**
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* Validates if the input is a Brazilian National Registry of Legal Entities (CNPJ) number.
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*
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* @author Alexandre Gomes Gaigalas <alganet@gmail.com>
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* @author Henrique Moody <henriquemoody@gmail.com>
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* @author Jayson Reis <santosdosreis@gmail.com>
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* @author Nick Lombard <github@jigsoft.co.za>
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* @author Renato Moura <renato@naturalweb.com.br>
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* @author William Espindola <oi@williamespindola.com.br>
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*/
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final class Cnpj 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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// Code ported from jsfromhell.com
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$bases = [6, 5, 4, 3, 2, 9, 8, 7, 6, 5, 4, 3, 2];
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$digits = $this->getDigits((string) $input);
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if (array_sum($digits) < 1) {
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return false;
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}
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if (count($digits) !== 14) {
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return false;
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}
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$n = 0;
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for ($i = 0; $i < 12; ++$i) {
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$n += $digits[$i] * $bases[$i + 1];
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}
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if ($digits[12] != (($n %= 11) < 2 ? 0 : 11 - $n)) {
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return false;
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}
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$n = 0;
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for ($i = 0; $i <= 12; ++$i) {
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$n += $digits[$i] * $bases[$i];
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}
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$check = ($n %= 11) < 2 ? 0 : 11 - $n;
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return $digits[13] == $check;
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}
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/**
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* @return int[]
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*/
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private function getDigits(string $input): array
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{
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return array_map(
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'intval',
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str_split(
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(string) preg_replace('/\D/', '', $input)
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)
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);
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}
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}
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