Post meta (custom fields) (category)
| add_post_meta() | Adds meta field to the specified post. |
| delete_post_meta() | Remove metadata matching criteria from a post. |
| get_post_custom() | Retrieve post meta fields, based on post ID. |
| get_post_custom_keys() | Retrieve meta field names for a post. |
| get_post_custom_values() | Retrieve values for a custom post field. |
| get_post_meta() | Gets the value of the specified custom field of the post. Also can get an array of all post meta fields. |
| register_post_meta() | Registers a meta key for posts (post custom field). |
| the_meta() | Display list of post custom fields. |
| update_post_meta() | Updates specified meta field of specified post. Or adds it, if it's not exists. |