Title: 4.9.8 | Developer.WordPress.org --- # New and updated in 4.9.8 Functions Hooks Classes Methods * function[register_term_meta()](https://developer.wordpress.org/reference/functions/register_term_meta/) * Registers a meta key for terms. * Used by [0 functions](https://developer.wordpress.org/reference/functions/register_term_meta/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/register_term_meta/#uses) | Source: [wp-includes/taxonomy.php:1549](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/taxonomy.php#L1549-L1553) * function[unregister_term_meta()](https://developer.wordpress.org/reference/functions/unregister_term_meta/) * Unregisters a meta key for terms. * Used by [0 functions](https://developer.wordpress.org/reference/functions/unregister_term_meta/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/unregister_term_meta/#uses) | Source: [wp-includes/taxonomy.php:1566](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/taxonomy.php#L1566-L1568) * function[get_object_subtype()](https://developer.wordpress.org/reference/functions/get_object_subtype/) * Returns the object subtype for a given object ID of a specific type. * Used by [8 functions](https://developer.wordpress.org/reference/functions/get_object_subtype/#used-by) | Uses [5 functions](https://developer.wordpress.org/reference/functions/get_object_subtype/#uses) | Source: [wp-includes/meta.php:1798](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/meta.php#L1798-L1859) * hook[get_object_subtype_{$object_type}](https://developer.wordpress.org/reference/hooks/get_object_subtype_object_type/) * Filters the object subtype identifier. * Used by [1 function](https://developer.wordpress.org/reference/hooks/get_object_subtype_object_type/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/get_object_subtype_object_type/#uses) | Source: [wp-includes/meta.php:1858](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/meta.php#L1858-L1858) * hook[sanitize_{$object_type}_meta_{$meta_key}_for_{$object_subtype}](https://developer.wordpress.org/reference/hooks/sanitize_object_type_meta_meta_key_for_object_subtype/) * Filters the sanitization of a specific meta key of a specific meta type and subtype. * Used by [1 function](https://developer.wordpress.org/reference/hooks/sanitize_object_type_meta_meta_key_for_object_subtype/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/sanitize_object_type_meta_meta_key_for_object_subtype/#uses) | Source: [wp-includes/meta.php:1360](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/meta.php#L1360-L1360) * method[WP_REST_Posts_Controller::get_available_actions()](https://developer.wordpress.org/reference/classes/wp_rest_posts_controller/get_available_actions/) * Gets the link relations available for the post and current user. * Used by [1 function](https://developer.wordpress.org/reference/classes/wp_rest_posts_controller/get_available_actions/#used-by) | Uses [6 functions](https://developer.wordpress.org/reference/classes/wp_rest_posts_controller/get_available_actions/#uses) | Source: [wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php:2353](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php#L2353-L2399) * method[WP_REST_Posts_Controller::get_schema_links()](https://developer.wordpress.org/reference/classes/wp_rest_posts_controller/get_schema_links/) * Retrieves Link Description Objects that should be added to the Schema for the posts collection. * Used by [2 functions](https://developer.wordpress.org/reference/classes/wp_rest_posts_controller/get_schema_links/#used-by) | Uses [5 functions](https://developer.wordpress.org/reference/classes/wp_rest_posts_controller/get_schema_links/#uses) | Source: [wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php:2850](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php#L2850-L2967) * method[WP_REST_Attachments_Controller::check_upload_size()](https://developer.wordpress.org/reference/classes/wp_rest_attachments_controller/check_upload_size/) * Determine if uploaded file exceeds space quota on multisite. * Used by [2 functions](https://developer.wordpress.org/reference/classes/wp_rest_attachments_controller/check_upload_size/#used-by) | Uses [6 functions](https://developer.wordpress.org/reference/classes/wp_rest_attachments_controller/check_upload_size/#uses) | Source: [wp-includes/rest-api/endpoints/class-wp-rest-attachments-controller.php:1573](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/rest-api/endpoints/class-wp-rest-attachments-controller.php#L1573-L1616) * method[WP_REST_Post_Meta_Fields::get_meta_subtype()](https://developer.wordpress.org/reference/classes/wp_rest_post_meta_fields/get_meta_subtype/) * Retrieves the post meta subtype. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_rest_post_meta_fields/get_meta_subtype/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/classes/wp_rest_post_meta_fields/get_meta_subtype/#uses) | Source: [wp-includes/rest-api/fields/class-wp-rest-post-meta-fields.php:56](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/rest-api/fields/class-wp-rest-post-meta-fields.php#L56-L58) * method[WP_REST_Comment_Meta_Fields::get_meta_subtype()](https://developer.wordpress.org/reference/classes/wp_rest_comment_meta_fields/get_meta_subtype/) * Retrieves the comment meta subtype. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_rest_comment_meta_fields/get_meta_subtype/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/classes/wp_rest_comment_meta_fields/get_meta_subtype/#uses) | Source: [wp-includes/rest-api/fields/class-wp-rest-comment-meta-fields.php:37](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/rest-api/fields/class-wp-rest-comment-meta-fields.php#L37-L39) * method[WP_REST_Term_Meta_Fields::get_meta_subtype()](https://developer.wordpress.org/reference/classes/wp_rest_term_meta_fields/get_meta_subtype/) * Retrieves the term meta subtype. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_rest_term_meta_fields/get_meta_subtype/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/classes/wp_rest_term_meta_fields/get_meta_subtype/#uses) | Source: [wp-includes/rest-api/fields/class-wp-rest-term-meta-fields.php:56](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/rest-api/fields/class-wp-rest-term-meta-fields.php#L56-L58) * method[WP_REST_User_Meta_Fields::get_meta_subtype()](https://developer.wordpress.org/reference/classes/wp_rest_user_meta_fields/get_meta_subtype/) * Retrieves the user meta subtype. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_rest_user_meta_fields/get_meta_subtype/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/classes/wp_rest_user_meta_fields/get_meta_subtype/#uses) | Source: [wp-includes/rest-api/fields/class-wp-rest-user-meta-fields.php:37](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/rest-api/fields/class-wp-rest-user-meta-fields.php#L37-L39) * method[WP_REST_Meta_Fields::get_meta_subtype()](https://developer.wordpress.org/reference/classes/wp_rest_meta_fields/get_meta_subtype/) * Retrieves the object meta subtype. * Used by [1 function](https://developer.wordpress.org/reference/classes/wp_rest_meta_fields/get_meta_subtype/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/classes/wp_rest_meta_fields/get_meta_subtype/#uses) | Source: [wp-includes/rest-api/fields/class-wp-rest-meta-fields.php:35](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/rest-api/fields/class-wp-rest-meta-fields.php#L35-L37) * hook[user_request_confirmed_email_subject](https://developer.wordpress.org/reference/hooks/user_request_confirmed_email_subject/) * Filters the subject of the user request confirmation email. * Used by [1 function](https://developer.wordpress.org/reference/hooks/user_request_confirmed_email_subject/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/user_request_confirmed_email_subject/#uses) | Source: [wp-includes/user.php:4318](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/user.php#L4318-L4318) * hook[user_erasure_complete_email_subject](https://developer.wordpress.org/reference/hooks/user_erasure_complete_email_subject/) * Filters the subject of the email sent when an erasure request is completed. * Used by [1 function](https://developer.wordpress.org/reference/hooks/user_erasure_complete_email_subject/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/user_erasure_complete_email_subject/#uses) | Source: [wp-includes/user.php:4522](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/user.php#L4522-L4527) * function[register_post_meta()](https://developer.wordpress.org/reference/functions/register_post_meta/) * Registers a meta key for posts. * Used by [1 function](https://developer.wordpress.org/reference/functions/register_post_meta/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/register_post_meta/#uses) | Source: [wp-includes/post.php:2769](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/post.php#L2769-L2773) * function[unregister_post_meta()](https://developer.wordpress.org/reference/functions/unregister_post_meta/) * Unregisters a meta key for posts. * Used by [0 functions](https://developer.wordpress.org/reference/functions/unregister_post_meta/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/unregister_post_meta/#uses) | Source: [wp-includes/post.php:2786](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/post.php#L2786-L2788) * hook[auth_{$object_type}_meta_{$meta_key}_for_{$object_subtype}](https://developer.wordpress.org/reference/hooks/auth_object_type_meta_meta_key_for_object_subtype/) * Filters whether the user is allowed to edit a specific meta key of a specific object type and subtype. * Used by [1 function](https://developer.wordpress.org/reference/hooks/auth_object_type_meta_meta_key_for_object_subtype/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/auth_object_type_meta_meta_key_for_object_subtype/#uses) | Source: [wp-includes/capabilities.php:497](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/capabilities.php#L497-L497) * method[WP_Term_Query::populate_terms()](https://developer.wordpress.org/reference/classes/wp_term_query/populate_terms/) * Creates an array of term objects from an array of term IDs. * Used by [1 function](https://developer.wordpress.org/reference/classes/wp_term_query/populate_terms/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/classes/wp_term_query/populate_terms/#uses) | Source: [wp-includes/class-wp-term-query.php:1123](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/class-wp-term-query.php#L1123-L1148) * function[_wp_privacy_settings_filter_draft_page_titles()](https://developer.wordpress.org/reference/functions/_wp_privacy_settings_filter_draft_page_titles/) * Appends ‘(Draft)’ to draft page titles in the privacy page dropdown so that unpublished content is obvious. * Used by [0 functions](https://developer.wordpress.org/reference/functions/_wp_privacy_settings_filter_draft_page_titles/#used-by) | Uses [2 functions](https://developer.wordpress.org/reference/functions/_wp_privacy_settings_filter_draft_page_titles/#uses) | Source: [wp-admin/includes/misc.php:1555](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-admin/includes/misc.php#L1555-L1562) * hook[add_inline_data](https://developer.wordpress.org/reference/hooks/add_inline_data/) * Fires after outputting the fields for the inline editor for posts and pages. * Used by [1 function](https://developer.wordpress.org/reference/hooks/add_inline_data/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/add_inline_data/#uses) | Source: [wp-admin/includes/template.php:395](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-admin/includes/template.php#L395-L395) * function[_wp_privacy_requests_screen_options()](https://developer.wordpress.org/reference/functions/_wp_privacy_requests_screen_options/) * Was used to add options for the privacy requests screens before they were separate files. * Used by [0 functions](https://developer.wordpress.org/reference/functions/_wp_privacy_requests_screen_options/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/_wp_privacy_requests_screen_options/#uses) | Source: [wp-admin/includes/deprecated.php:1572](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-admin/includes/deprecated.php#L1572-L1574) * function[registered_meta_key_exists()](https://developer.wordpress.org/reference/functions/registered_meta_key_exists/) * Checks if a meta key is registered. * Used by [2 functions](https://developer.wordpress.org/reference/functions/registered_meta_key_exists/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/registered_meta_key_exists/#uses) | Source: [wp-includes/meta.php:1641](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/meta.php#L1641-L1645) * function[unregister_meta_key()](https://developer.wordpress.org/reference/functions/unregister_meta_key/) * Unregisters a meta key from the list of registered keys. * Used by [2 functions](https://developer.wordpress.org/reference/functions/unregister_meta_key/#used-by) | Uses [2 functions](https://developer.wordpress.org/reference/functions/unregister_meta_key/#uses) | Source: [wp-includes/meta.php:1661](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/meta.php#L1661-L1697) * function[get_registered_meta_keys()](https://developer.wordpress.org/reference/functions/get_registered_meta_keys/) * Retrieves a list of registered metadata args for an object type, keyed by their meta keys. * Used by [5 functions](https://developer.wordpress.org/reference/functions/get_registered_meta_keys/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/functions/get_registered_meta_keys/#uses) | Source: [wp-includes/meta.php:1712](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/meta.php#L1712-L1720) * function[sanitize_meta()](https://developer.wordpress.org/reference/functions/sanitize_meta/) * Sanitizes meta value. * Used by [4 functions](https://developer.wordpress.org/reference/functions/sanitize_meta/#used-by) | Uses [2 functions](https://developer.wordpress.org/reference/functions/sanitize_meta/#uses) | Source: [wp-includes/meta.php:1342](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/meta.php#L1342-L1378) * function[register_meta()](https://developer.wordpress.org/reference/functions/register_meta/) * Registers a meta key. * Used by [4 functions](https://developer.wordpress.org/reference/functions/register_meta/#used-by) | Uses [10 functions](https://developer.wordpress.org/reference/functions/register_meta/#uses) | Source: [wp-includes/meta.php:1435](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/meta.php#L1435-L1565)