KB CPT

        $labels = array( 'name' => 'Knowledge Base Articles',
                         'singular_name' => 'Article',
                         'menu_name' => 'Knowledge Base',
                         'add_new_item' => 'Add an Article', );
        $args = array( 'label' => 'Knowledge Base Articles',
            'labels' => $labels,
            'supports' => array( 'title', 'editor', 'page-attributes', ),
            'taxonomies' => array( 'kb_categories', 'kb_tags' ),
            'hierarchical' => true,
            'public' => true,
            'show_ui' => true,
            'show_in_menu' => true,
            'menu_position' => 21,
            'menu_icon'  => 'dashicons-screenoptions',
            'show_in_admin_bar' => false,
            'show_in_nav_menus' => true,
            'can_export' => true,
            'has_archive' => true,
            'exclude_from_search' => ( ! $_kbopt_search ),
            'publicly_queryable' => true,
            'query_var' => 'gyo_kb',
            'show_in_rest' => true,
            'rewrite' => array( 'slug' => $_kbopt_rewrite ),
            );
        register_post_type( 'gyo_kb', $args );
        flush_rewrite_rules( );