walk_nav_menu_tree( array $items, int $depth, stdClass $args )

使用示例

• 示例1

  在WordPress导航菜单中添加一个metabox，并添加两个预定义链接（登录、注销）。

  add_action( 'admin_head-nav-menus.php', function() {
      add_meta_box( 'plugin-slug-menu-metabox', "Wordpress Login/Logout", 'wpdocs_plugin_slug_render_menu_metabox', 'nav-menus', 'side', 'default', array( /*custom params*/ ) );
  } );
  
  function wpdocs_plugin_slug_render_menu_metabox( $object, $args )
  {
    global $nav_menu_selected_id;
    // Create an array of objects that imitate Post objects
    $my_items = array(
      (object) array(
          'ID' => 1,
          'object_id' => 1,
          'type_label' => 'Login',
          'title' => 'Login',
          'url' => wp_login_url(),
          'type' => 'custom',
          'object' => 'plugin-slug-slug',
          'db_id' => 0,
          'menu_item_parent' => 0,
          'post_parent' => 0,
          'target' => '',
          'attr_title' => '',
          'description' => '',
          'classes' => array(),
          'xfn' => '',
      ),
      (object) array(
          'ID' => 1,
          'object_id' => 1,
          'type_label' => 'Logout',
          'title' => 'Logout',
          'url' => wp_logout_url(),
          'type' => 'custom',
          'object' => 'plugin-slug-slug',
          'db_id' => 0,
          'menu_item_parent' => 0,
          'post_parent' => 0,
          'target' => '',
          'attr_title' => '',
          'description' => '',
          'classes' => array(),
          'xfn' => '',
      ),
    );
  
    $db_fields = false;
    // If your links will be hierarchical, adjust the $db_fields array below
    if ( false ) { 
      $db_fields = array( 'parent' => 'parent', 'id' => 'post_parent' ); 
    }
  
    $walker = new Walker_Nav_Menu_Checklist( $db_fields );
    $removed_args = array( 'action', 'customlink-tab', 'edit-menu-item', 'menu-item', 'page-tab', '_wpnonce', );
    ?>
    <div id="plugin-slug-div">
      <div id="tabs-panel-plugin-slug-all" class="tabs-panel tabs-panel-active">
      <ul id="plugin-slug-checklist-pop" class="categorychecklist form-no-clear" >
        <?php echo walk_nav_menu_tree( array_map( 'wp_setup_nav_menu_item', $my_items ), 0, (object) array( 'walker' => $walker ) ); ?>
      </ul>
      <p class="button-controls">
        <span class="add-to-menu">
          <input type="submit"<?php wp_nav_menu_disabled_check( $nav_menu_selected_id ); ?> class="button-secondary submit-add-to-menu right" value="<?php esc_attr_e( 'Add to Menu' ); ?>" name="add-plugin-slug-menu-item" id="submit-plugin-slug-div" />
          <span class="spinner"></span>
        </span>
      </p>
    </div>
    <?php
  }