Appends ‘(Draft)’ to draft page titles in the privacy page dropdown so that unpublished content is obvious.

Returns the object subtype for a given object ID of a specific type.

Retrieves a list of registered meta keys for an object type.

Registers a meta key.

Registers a meta key for posts.

Registers a meta key for terms.

Checks if a meta key is registered.

Sanitizes meta value.

Unregisters a meta key from the list of registered keys.

Unregisters a meta key for posts.