如何为WordPress插件添加导航菜单管理功能

function myplugin_menu_page(){
    add_menu_page(
        'My Plugin Menu', // 页面标题
        'My Plugin', // 菜单标题
        'manage_options', // 权限要求
        'my-plugin', // 菜单slug
        'myplugin_menu_callback', // 回调函数
        'dashicons-admin-plugins', // 菜单图标
        10 // 菜单位置
    );
}
add_action('admin_menu', 'myplugin_menu_page');

function myplugin_menu_callback(){
    if(!current_user_can('manage_options')){
        wp_die(__('You do not have sufficient permissions to access this page.'));
    }
    
    // 在这里编写菜单页面的内容和逻辑
    echo '<h1>My Plugin Menu</h1>';
    // 添加表单和导航菜单设置
}

function myplugin_menu_callback(){
    if(!current_user_can('manage_options')){
        wp_die(__('You do not have sufficient permissions to access this page.'));
    }
    
    if(isset($_POST['submit'])){
        // 处理表单提交
        $menu_settings = $_POST['menu_settings'];
        update_option('myplugin_menu_settings', $menu_settings);
        echo '<div class="notice notice-success"><p>Menu settings saved successfully.</p></div>';
    }
    
    // 获取导航菜单设置
    $menu_settings = get_option('myplugin_menu_settings', '');
    
    echo '<h1>My Plugin Menu</h1>';
    echo '<form action="" method="post">';
    echo '<label for="menu_settings">Menu Settings</label>';
    echo '<input type="text" name="menu_settings" id="menu_settings" value="'.$menu_settings.'">';
    echo '<input type="submit" name="submit" value="Save">';
    echo '</form>';
}

function myplugin_nav_menu_args($args){
    // 获取导航菜单设置
    $menu_settings = get_option('myplugin_menu_settings');
    
    // 应用导航菜单设置
    $args['menu'] = $menu_settings;
    
    return $args;
}
add_filter('wp_nav_menu_args', 'myplugin_nav_menu_args');