custom-bulk-action.php

<?php

//處理訂單狀態
add_filter( 'handle_bulk_actions-edit-shop_order', 'wootest_handle_bulk_actions_edit_product', 10, 3 );
function wootest_handle_bulk_actions_edit_product( $redirect_to, $action, $post_ids ) {
        global $typenow;
        $post_type = $typenow;
        
        if( $post_type == 'shop_order' ) {
            $wp_list_table = _get_list_table('WP_Posts_List_Table');
            $action = $wp_list_table->current_action();
            $allowed_actions = array( 'wc-awaiting-shipment' );

            if( !in_array( $action, $allowed_actions ) ) return;

            switch( $action ) {
                
                case "wc-awaiting-shipment":
                    if ( count($post_ids) > 0 ) {
                        foreach( $post_ids as $order_id) {
                            $order = new WC_Order($order_id);
                            if($order->status != 'wc-awaiting-shipment' ) {
                                $order->update_status('wc-awaiting-shipment', 'order_note');
                            }       
                        }
                        
                    }
                    $redirect_to = add_query_arg( 'wootest_shop_order_update_results', count( $post_ids ), $redirect_to );
                    return $redirect_to;
                break;
                default: return;
            }

            

        }//end shop_order
}

//顯示notice
add_action( 'admin_notices', 'wootest_bulk_action_edit_shop_order_admin_notice' );
function wootest_bulk_action_edit_shop_order_admin_notice() {
    if ( isset( $_REQUEST['wootest_shop_order_update_results'] ) ) {
        $updated_shop_orders_count = intval( $_REQUEST['wootest_shop_order_update_results'] );

        echo '<div id="message" class="' . ( $updated_shop_orders_count > 0 ? 'updated' : 'error' ) . '">';

        if ( $updated_shop_orders_count > 0 ) {
            echo '<p>' . __( 'Updated Orders for '. $updated_shop_orders_count .' '. _n( 'order', 'orders', $updated_shop_orders_count, 'wordpress' ).'!', 'wordpress' ) . '</p>';
        } else {
            echo '<p>' . __( 'No Orders were updated!', 'wordpress' ) . '</p>';
        }

        echo '</div>';
    }
}