uninstall.php

<?php
/**
 * Define Uninstall script.
 *
 * @package FacebookPixelPlugin
 *
 * @return void
 */

/*
* Copyright (C) 2017-present, Meta, Inc.
*
* This program 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; version 2 of the License.
* This program 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.
*/
namespace FacebookPixelPlugin;

require_once plugin_dir_path( __FILE__ ) . 'vendor/autoload.php';

use FacebookPixelPlugin\Core\FacebookPluginConfig;

if ( ! defined( 'WP_UNINSTALL_PLUGIN' ) ) {
    die;
}

delete_option( FacebookPluginConfig::SETTINGS_KEY );
delete_option( FacebookPluginConfig::OLD_SETTINGS_KEY );

delete_user_meta( get_current_user_id(), FacebookPluginConfig::ADMIN_IGNORE_PIXEL_ID_NOTICE );