registered_meta_key_exists() │ WP 4.6.0

Checks if a meta key is registered.

No Hooks.

Return

true|false. True if the meta key is registered to the object type and, if provided, the object subtype. False if not.

Usage

registered_meta_key_exists( $object_type, $meta_key, $object_subtype );

$object_type(string) (required)

Type of object metadata is for. Accepts 'post', 'comment', 'term', 'user', or any other object type with an associated meta table.

$meta_key(string) (required)

Metadata key.

$object_subtype(string)

The subtype of the object type.
Default: empty string

Changelog

registered_meta_key_exists() registered meta key exists code ^{WP 6.4.1}

function registered_meta_key_exists( $object_type, $meta_key, $object_subtype = '' ) {
	$meta_keys = get_registered_meta_keys( $object_type, $object_subtype );

	return isset( $meta_keys[ $meta_key ] );
}