get_search_handler example

    /** * Retrieves a collection of search results. * * @since 5.0.0 * * @param WP_REST_Request $request Full details about the request. * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure. */
    public function get_items( $request ) {
        $handler = $this->get_search_handler( $request );
        if ( is_wp_error( $handler ) ) {
            return $handler;
        }

        $result = $handler->search_items( $request );

        if ( ! isset( $result[ WP_REST_Search_Handler::RESULT_IDS ] ) || ! is_array( $result[ WP_REST_Search_Handler::RESULT_IDS ] ) || ! isset( $result[ WP_REST_Search_Handler::RESULT_TOTAL ] ) ) {
            return new WP_Error(
                'rest_search_handler_error',
                __( 'Internal search handler error.' ),
                array( 'status' => 500 )
            );