Metadata (category)
add_metadata() | Add metadata (an additional data) for the specified object (a post, a comment, a user etc). |
delete_metadata() | Delete metadata for the specified object. |
delete_metadata_by_mid() | Delete meta data by meta ID |
get_metadata() | Retrieve metadata for the specified object. |
is_protected_meta() | Determines whether a meta key is protected (internal). |
register_meta() | Registers a meta key (key of custom field). |
sanitize_meta() | Sanitize meta value. |
update_metadata() | Update metadata for the specified object. If no value already exists, the metadata will be added as new metadata. |