Luhn.php

<?php


/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace Symfony\Component\Validator\Constraints;

use Symfony\Component\Validator\Constraint;

/**
 * Validates that a value (typically a credit card number) passes the Luhn algorithm.
 *
 * @see https://en.wikipedia.org/wiki/Luhn_algorithm
 *
 * @author Tim Nagel <t.nagel@infinite.net.au>
 * @author Greg Knapp http://gregk.me/2011/php-implementation-of-bank-card-luhn-algorithm/
 * @author Bernhard Schussek <bschussek@gmail.com>
 */
class Luhn extends Constraint {
    public const INVALID_CHARACTERS_ERROR = 'dfad6d23-1b74-4374-929b-5cbb56fc0d9e';
    public const CHECKSUM_FAILED_ERROR = '4d760774-3f50-4cd5-a6d5-b10a3299d8d3';
    protected const ERROR_NAMES = [
        self::INVALID_CHARACTERS_ERROR => 'INVALID_CHARACTERS_ERROR',
        self::CHECKSUM_FAILED_ERROR => 'CHECKSUM_FAILED_ERROR',
    ];
    public string $message = 'Invalid card number.';
    
    /**
     * @param array<string,mixed>|null $options
     * @param string[]|null            $groups
     */
    public function __construct(?array $options = null, ?string $message = null, ?array $groups = null, mixed $payload = null) {
        parent::__construct($options, $groups, $payload);
        $this->message = $message ?? $this->message;
    }

}