Users (category)
| delete_user_option() | Deletes user metadata on a site-wide or network-wide basis. |
| get_user_option() | Gets the specified user option. The option will relate to the site user in the network (for multisite installations) or just to the user. |
| update_user_option() | Updates the user option (meta-field). Designed for MU mode. A wrapper for update_user_meta(), only adds the database prefix to the meta-field name. |