This code snippet allows you to disable the WordPress Admin Bar for all users on your website. The Admin Bar is the toolbar that appears at the top of the page when logged in to the WordPress dashboard. Disabling it can be useful if you want to have a cleaner front-end view for your website visitors or if you have a custom user interface and don’t need the default Admin Bar functionality.
The code uses the show_admin_bar filter and sets its return value to false using the __return_false function. This effectively prevents the WordPress Admin Bar from being displayed.
Add this code to your theme’s functions.php file to disable the WordPress Admin Bar. Note that this only affects the display of the Admin Bar and does not restrict any administrative functionality.
/* Disable WordPress Admin Bar for all users */
add_filter( 'show_admin_bar', '__return_false' );