Disabling/Removing the Toolbar (Admin Bar) in WordPress

First of all, the toolbar can be disabled on the profile page and in the admin panel: Users > Profile.

But when you need to disable it globally, use the function show_admin_bar().

Examples of different disabling options:

Soft Disabling

Suppose we need to disable the "Toolbar" on the front end of the site. However, we need to allow plugins to enable the toolbar through the show_admin_bar filter.

To do this, insert the following line into the theme's functions.php file:

show_admin_bar( false );

Completely Disable the Toolbar

On the front end and in the admin panel:

// Disable admin bar on the front end
add_filter( 'show_admin_bar', '__return_false' );

// Disable admin bar in the admin panel
remove_action( 'in_admin_header', 'wp_admin_bar_render', 0 );

Disable the Toolbar for Everyone Except Administrators (on the front end)

In this example, the toolbar is not disabled in the admin panel.

add_filter( 'show_admin_bar', 'admin_bar_for_admin_only', 99 );

function admin_bar_for_admin_only( $show_admin_bar ) {

	if ( $show_admin_bar && ! current_user_can( 'manage_options' ) ) {
		$show_admin_bar = false;
	}

	return $show_admin_bar;
}

Similarly, you can disable the toolbar for any role. Instead of the capability 'manage_options', specify the appropriate capability for the role, see the list of capabilities here. Here are some of them:

• publish_posts - author
• edit_others_posts - editor

Disable the Toolbar for Network Administrators

add_filter( 'show_admin_bar', 'admin_bar_for_admin_only', 99 );

function admin_bar_for_admin_only( $show_admin_bar ) {

	if ( $show_admin_bar && ! is_network_admin() ) {
		$show_admin_bar = false;
	}

	return $show_admin_bar;
}

And similarly, you can disable the toolbar using conditional tags or other checks.