Adds a CSS class to a string.

Adds CSS classes for top-level administration menu items.

Description Pending

Fires before the administration menu loads in the admin.

Fires before the administration menu loads in the Network Admin.

Fires before the administration menu loads in the User Admin.

Filters administration menu array with classes added for top-level items.

Fires before the administration menu loads in the admin.

Fires when access to an admin page is denied.

Filters whether to enable custom ordering of the administration menu.