Checks if a meta key is registered.

$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 Optional

The subtype of the object type.

Default: ''

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

File: wp-includes/meta.php. View all references

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 ] );
}