get_registered_meta_keys( string $object_type, string $object_subtype = '' )

Retrieves a list of registered meta keys for an object type.

Parameters

$object_type

(Required) The type of object. Post, comment, user, term.

$object_subtype

(Optional) The subtype of the object type.

Default value: ''

Return

(array) List of registered meta keys.

Source

File: wp-includes/meta.php

function get_registered_meta_keys( $object_type, $object_subtype = '' ) {
	global $wp_meta_keys;

	if ( ! is_array( $wp_meta_keys ) || ! isset( $wp_meta_keys[ $object_type ] ) || ! isset( $wp_meta_keys[ $object_type ][ $object_subtype ] ) ) {
		return array();
	}

	return $wp_meta_keys[ $object_type ][ $object_subtype ];
}

Expand Source Code View on GitHub

Used By

Used By
Used By	Description
wp-includes/rest-api/fields/class-wp-rest-meta-fields.php: WP_REST_Meta_Fields::get_registered_fields()	Retrieves all the registered meta fields.
wp-includes/meta.php: registered_meta_key_exists()	Checks if a meta key is registered.
wp-includes/meta.php: get_registered_metadata()	Retrieves registered metadata for a specified object.

Changelog

Changelog
Version	Description
WP-4.9.8	The `$object_subtype` parameter was added.
WP-4.6.0	Introduced.