cas_uninstall.php

<?php
/**
 * @package Content Aware Sidebars
 * @author Joachim Jensen <joachim@dev.institute>
 * @license GPLv3
 * @copyright 2024 by Joachim Jensen
 */

defined('ABSPATH') || exit;

if (!(defined('WP_UNINSTALL_PLUGIN') || defined('WP_FS__UNINSTALL_MODE'))) {
    exit;
}

global $wpdb;

// Remove db version
delete_option('cas_db_version');
delete_option('cas_pro');

//Remove all sidebars, groups, meta and terms.
$sidebars = get_posts([
    'post_type'      => 'sidebar',
    'posts_per_page' => -1
]);
foreach ($sidebars as $sidebar) {
    $groups = get_posts([
        'post_parent'    => $sidebar->ID,
        'post_type'      => 'condition_group',
        'posts_per_page' => -1
    ]);
    foreach ($groups as $group) {
        wp_delete_post($group->ID, true);
    }
    wp_delete_post($sidebar->ID, true);
}

// Remove user meta
$wpdb->query("DELETE FROM $wpdb->usermeta WHERE meta_key IN('metaboxhidden_sidebar','closedpostboxes_sidebar','managesidebarcolumnshidden','{$wpdb->prefix}_ca_cas_tour')");