- %1$s is private and should not be used in themes or plugins directly.
_get_additional_user_keys ( $user )
- (WP_User) $user WP_User instance.
- (array) List of user keys to be populated in wp_update_user().
- Introduced in WordPress: 3.3.0
- Deprecated in WordPress: —
Returns a list of meta keys to be (maybe) populated in wp_update_user().
The list of keys returned via this function are dependent on the presence
of those keys in the user meta data to be set.