这可能不是正确的方法，但这在测试时对我有效。您可以使用这些组合删除工具栏（管理栏）中的所有链接，然后使用css隐藏空工具栏：

function remove_admin_bar_links() {
  global $wp_admin_bar;
  $wp_admin_bar->remove_menu(\'wp-logo\');          // Remove the WordPress logo
  $wp_admin_bar->remove_menu(\'about\');            // Remove the about WordPress link
  $wp_admin_bar->remove_menu(\'wporg\');            // Remove the WordPress.org link
  $wp_admin_bar->remove_menu(\'documentation\');    // Remove the WordPress documentation link
  $wp_admin_bar->remove_menu(\'support-forums\');   // Remove the support forums link
  $wp_admin_bar->remove_menu(\'feedback\');         // Remove the feedback link
  $wp_admin_bar->remove_menu(\'site-name\');        // Remove the site name menu
  $wp_admin_bar->remove_menu(\'view-site\');        // Remove the view site link
  $wp_admin_bar->remove_menu(\'updates\');          // Remove the updates link
  $wp_admin_bar->remove_menu(\'comments\');         // Remove the comments link
  $wp_admin_bar->remove_menu(\'new-content\');      // Remove the content link
  $wp_admin_bar->remove_menu(\'w3tc\');             // If you use w3 total cache remove the performance link
  $wp_admin_bar->remove_menu(\'my-account\');       // Remove the user details tab
}
add_action( \'wp_before_admin_bar_render\', \'remove_admin_bar_links\' );


function hide_admin_bar() { ?>
  <style type="text/css">

    #wpadminbar {
      display: none;
    }
  </style>
<?php }
// on backend area
add_action( \'admin_head\', \'hide_admin_bar\' );
// on frontend area
add_action( \'wp_head\', \'hide_admin_bar\' );

输出如下屏幕截图：