I know how to remove items from the left nav bar (hook into admin_menu and do global $menu; unset( $menu[ __( "Posts" ) ] ); for example). But it still shows a left nav bar (with nothing on it). I want the entire left nav bar gone.
I have tried this and it doesn't work:
//This doesn't work (in any hook, or plugin constructor)
show_admin_bar(false);
//This also doesn't work
add_filter('show_admin_bar', '__return_false');
What is the hook/function to do this?
You could creatively use output caching to capture the adminbar and then discard it like so:
<?php
// this filter runs in menu-header.php L37 right before the admin menu is rendered
add_filter( 'parent_file', function( $parent_file ){
ob_start();
return $parent_file;
} );
// runs after the output
add_action( 'in_admin_header', function(){
ob_clean(); // discard output
echo '<div id="wpcontent">';
} );
Please do not actually consider using this in any production environment. It does not provide any security and it might break various things (for example the admin toolbar). I consider this an educational answer to the problem "how to use PHP output caching and WP filters to move remove stuff?". You are probably better off just using CSS.
If you look at the bottom of the menu-header.php file in the wp-admin folder, you will see that the admin menu is hard coded. There are no hooks that would allow you to disable it.
Another issue is that the #wpcontent div has a left margin (depending on the screen size), so even if you did strip out the admin menu code, the space it normally occupies would still be there.
jQuery('#adminmenuback, #adminmenuwrap').remove();