wpseek.com
A WordPress-centric search engine for devs and theme authors
register_meta › WordPress Function
Since3.3.0
Deprecatedn/a
› register_meta ( $object_type, $meta_key, $args, $deprecated = null )
Parameters: (4) |
|
Returns: |
|
Defined at: |
|
Codex: | |
Change Log: |
|
Registers a meta key.
It is recommended to register meta keys for a specific combination of object type and object subtype. If passing an object subtype is omitted, the meta key will be registered for the entire object type, however it can be partly overridden in case a more specific meta key of the same name exists for the same object type and a subtype. If an object type does not support any subtypes, such as users or comments, you should commonly call this function without passing a subtype.Related Functions: register_post_meta, register_term_meta, unregister_meta_key, unregister_term_meta, register_widget
Source
function register_meta( $object_type, $meta_key, $args, $deprecated = null ) { global $wp_meta_keys; if ( ! is_array( $wp_meta_keys ) ) { $wp_meta_keys = array(); } $defaults = array( 'object_subtype' => '', 'type' => 'string', 'label' => '', 'description' => '', 'default' => '', 'single' => false, 'sanitize_callback' => null, 'auth_callback' => null, 'show_in_rest' => false, 'revisions_enabled' => false, ); // There used to be individual args for sanitize and auth callbacks. $has_old_sanitize_cb = false; $has_old_auth_cb = false; if ( is_callable( $args ) ) { $args = array( 'sanitize_callback' => $args, ); $has_old_sanitize_cb = true; } else { $args = (array) $args; } if ( is_callable( $deprecated ) ) { $args['auth_callback'] = $deprecated; $has_old_auth_cb = true; } /** * Filters the registration arguments when registering meta. * * @since 4.6.0 * * @param array $args Array of meta registration arguments. * @param array $defaults Array of default arguments. * @param string $object_type Type of object metadata is for. Accepts 'post', 'comment', 'term', 'user', * or any other object type with an associated meta table. * @param string $meta_key Meta key. */ $args = apply_filters( 'register_meta_args', $args, $defaults, $object_type, $meta_key ); unset( $defaults['default'] ); $args = wp_parse_args( $args, $defaults ); // Require an item schema when registering array meta. if ( false !== $args['show_in_rest'] && 'array' === $args['type'] ) { if ( ! is_array( $args['show_in_rest'] ) || ! isset( $args['show_in_rest']['schema']['items'] ) ) { _doing_it_wrong( __FUNCTION__, __( 'When registering an "array" meta type to show in the REST API, you must specify the schema for each array item in "show_in_rest.schema.items".' ), '5.3.0' ); return false; } } $object_subtype = ! empty( $args['object_subtype'] ) ? $args['object_subtype'] : ''; if ( $args['revisions_enabled'] ) { if ( 'post' !== $object_type ) { _doing_it_wrong( __FUNCTION__, __( 'Meta keys cannot enable revisions support unless the object type supports revisions.' ), '6.4.0' ); return false; } elseif ( ! empty( $object_subtype ) && ! post_type_supports( $object_subtype, 'revisions' ) ) { _doing_it_wrong( __FUNCTION__, __( 'Meta keys cannot enable revisions support unless the object subtype supports revisions.' ), '6.4.0' ); return false; } } // If `auth_callback` is not provided, fall back to `is_protected_meta()`. if ( empty( $args['auth_callback'] ) ) { if ( is_protected_meta( $meta_key, $object_type ) ) { $args['auth_callback'] = '__return_false'; } else { $args['auth_callback'] = '__return_true'; } } // Back-compat: old sanitize and auth callbacks are applied to all of an object type. if ( is_callable( $args['sanitize_callback'] ) ) { if ( ! empty( $object_subtype ) ) { add_filter( "sanitize_{$object_type}_meta_{$meta_key}_for_{$object_subtype}", $args['sanitize_callback'], 10, 4 ); } else { add_filter( "sanitize_{$object_type}_meta_{$meta_key}", $args['sanitize_callback'], 10, 3 ); } } if ( is_callable( $args['auth_callback'] ) ) { if ( ! empty( $object_subtype ) ) { add_filter( "auth_{$object_type}_meta_{$meta_key}_for_{$object_subtype}", $args['auth_callback'], 10, 6 ); } else { add_filter( "auth_{$object_type}_meta_{$meta_key}", $args['auth_callback'], 10, 6 ); } } if ( array_key_exists( 'default', $args ) ) { $schema = $args; if ( is_array( $args['show_in_rest'] ) && isset( $args['show_in_rest']['schema'] ) ) { $schema = array_merge( $schema, $args['show_in_rest']['schema'] ); } $check = rest_validate_value_from_schema( $args['default'], $schema ); if ( is_wp_error( $check ) ) { _doing_it_wrong( __FUNCTION__, __( 'When registering a default meta value the data must match the type provided.' ), '5.5.0' ); return false; } if ( ! has_filter( "default_{$object_type}_metadata", 'filter_default_metadata' ) ) { add_filter( "default_{$object_type}_metadata", 'filter_default_metadata', 10, 5 ); } } // Global registry only contains meta keys registered with the array of arguments added in 4.6.0. if ( ! $has_old_auth_cb && ! $has_old_sanitize_cb ) { unset( $args['object_subtype'] ); $wp_meta_keys[ $object_type ][ $object_subtype ][ $meta_key ] = $args; return true; } return false; }