ext_tables.php

<?php

/*
 * Copyright notice
 *
 * (c) DMK E-BUSINESS GmbH <dev@dmk-ebusiness.de>
 * All rights reserved
 *
 * This file is part of the "mkoptin" Extension for TYPO3 CMS.
 *
 * This script is part of the TYPO3 project. The TYPO3 project is
 * free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * The GNU General Public License can be found at
 * www.gnu.org/copyleft/gpl.html
 *
 * This script is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * This copyright notice MUST APPEAR in all copies of the script!
 */

if (!defined('TYPO3_MODE')) {
    exit('Access denied.');
}

call_user_func(
    function () {
        // Register a node in ext_localconf.php
        $GLOBALS['TYPO3_CONF_VARS']['SYS']['formEngine']['nodeRegistry']['MkOptinStateElement'] = [
            'nodeName' => 'optInStateElement',
            'priority' => 40,
            'class' => \DMK\Optin\Backend\Form\Element\OptinStateElement::class,
        ];
    }
);