WordPress 플러그인에 백업 및 복원 기능을 추가하는 방법

CREATE TABLE `wp_plugin_backup` (
  `id` mediumint(9) NOT NULL AUTO_INCREMENT,
  `backup_data` longtext NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

add_action('admin_menu', 'plugin_add_menu');

function plugin_add_menu() {
    add_submenu_page(
        'options-general.php',
        '插件备份还原',
        '插件备份还原',
        'manage_options',
        'plugin-backup-page',
        'plugin_backup_page_callback'
    );
}

function plugin_backup_page_callback() {
    ?>
    <div class="wrap">
        <h1><?php echo esc_html(get_admin_page_title()); ?></h1>
        <form action="<?php echo admin_url('admin-post.php'); ?>" method="post">
            <input type="hidden" name="action" value="plugin_backup">
            <?php wp_nonce_field('plugin_backup_action', 'plugin_backup_nonce'); ?>
            <input type="submit" class="button button-primary" value="备份插件数据">
        </form>
        <br>
        <form action="<?php echo admin_url('admin-post.php'); ?>" method="post">
            <input type="hidden" name="action" value="plugin_restore">
            <?php wp_nonce_field('plugin_restore_action', 'plugin_restore_nonce'); ?>
            <input type="submit" class="button" value="恢复插件数据">
        </form>
    </div>
    <?php
}

add_action('admin_post_plugin_backup', 'plugin_backup');

function plugin_backup() {
    if (!current_user_can('manage_options')) {
        wp_die('You do not have sufficient permissions to access this page.');
    }

    check_admin_referer('plugin_backup_action', 'plugin_backup_nonce');

    global $wpdb;
    $table_name = $wpdb->prefix . 'plugin_backup';
    $backup_data = json_encode(/* 这里根据你的插件需要备份的数据来进行获取 */);

    $wpdb->insert($table_name, array('backup_data' => $backup_data));

    wp_redirect(admin_url('options-general.php?page=plugin-backup-page'));
    exit;
}

add_action('admin_post_plugin_restore', 'plugin_restore');

function plugin_restore() {
    if (!current_user_can('manage_options')) {
        wp_die('You do not have sufficient permissions to access this page.');
    }

    check_admin_referer('plugin_restore_action', 'plugin_restore_nonce');

    global $wpdb;
    $table_name = $wpdb->prefix . 'plugin_backup';
    $latest_backup = $wpdb->get_var("SELECT backup_data FROM $table_name ORDER BY id DESC LIMIT 1");
    $restored_data = json_decode($latest_backup, true);

    /* 这里根据你的插件需要还原的数据来进行相应的操作 */

    wp_redirect(admin_url('options-general.php?page=plugin-backup-page'));
    exit;
}