好的，首先您需要添加自己的WP\\U计划事件：

add_action( \'wp\', function () {
    if (! wp_next_scheduled ( \'mark_posts_as_featured_event\' )) {
        wp_schedule_event(time(), \'daily\', \'mark_posts_as_featured_event\');
    }
} );

function mark_posts_as_featured_event_callback() {
    // if there are sticky posts in our CPT, unstick them
    $sticked_post_ids = get_option( \'sticky_posts\' );
    if ( ! empty ) { 
        $old_featured_posts = get_posts( array(
            \'post_type\' => \'<MY_POST_TYPE>\',
            \'fields\' => \'ids\',
            \'post__in\' => $sticked_post_ids,
        ) );

        foreach ( $old_featured_post_ids as $post_id ) {
            unstick_post( $post_id );
        }
    }

    // stick new posts
    // get_random_posts
    $new_featured_post_ids = get_posts( array(
        \'post_type\' => \'<MY_POST_TYPE>\',
        \'posts_per_page\' => 3,
        \'orderby\' => \'rand\',
        \'fields\' => \'ids\',
    ) );

    foreach ( $new_featured_post_ids as $post_id ) {
        stick_post( $post_id );
    } 
}
add_action( \'mark_posts_as_featured_event\', \'mark_posts_as_featured_event_callback\' );