Check whether to disable the Menu Locations meta box submit button and inputs.

This was once used to display a meta box for the nav menu theme locations.

Saves nav menu items

Retrieves formatted date timestamp of a revision (linked to that revisions’s page).

Prepare revisions for JavaScript.

Retrieves metadata from an audio file’s ID3 tags.

Retrieves metadata from a video file’s ID3 tags.

Checks lock status on the New/Edit Post screen and refresh the lock.

Checks nonce expiration on the New/Edit Post screen and refresh if needed.

Returns the URL that allows the user to register on the site.