<?php
/**
 * Created by PhpStorm.
 * User: tblisi
 * Date: 7/5/18
 * Time: 10:18 PM
    Plugin Name: Admin Bar Manager
    Plugin URI:
    Description: Modifies the WordPress admin bar
    Version: 1.0
    License: MIT
 *
 */
// remove admin bar
add_filter('show_admin_bar', '__return_false');

// update toolbar
function update_adminbar($wp_adminbar) {
    // remove unnecessary items
    $wp_adminbar->remove_node('wp-logo');
    $wp_adminbar->remove_node('customize');
    $wp_adminbar->remove_node('comments');
    $wp_adminbar->remove_node('new-post');
    $wp_adminbar->remove_node('new-media');
    $wp_adminbar->remove_node('new-page');

   // add Custom menu item
   $wp_adminbar->add_node([
       'id' => 'my-menu',
       'title' => 'Menu',
       'href' => 'url',
       'meta' => [
           'target' => 'my-menu'
       ]
   ]);

   // add Forum sub-menu item
   $wp_adminbar->add_node([
       'id' => 'my-sub-menu',
       'title' => 'Child Menu',
       'parent' => 'my-menu',
       'href' => 'url',
       'meta' => [
           'target' => 'my-menu'
       ]
   ]);
}

// admin_bar_menu hook
add_action('admin_bar_menu', 'update_adminbar', 999);

?>