在Mage_Sales_Model_Order_Status_History中，如果提供参数null或常量Mage_Sales_Model_Order_Status_History::CUSTOMER_NOTIFICATION_NOT_APPLICABLE的值，则可以看到setIsCustomerNotified方法禁止显示通知. .令人困惑的是，使用false会导致发送通知.

In Mage_Sales_Model_Order_Status_History, you can see that the setIsCustomerNotified method suppresses notification if you provide either parameter null or the value of the constant Mage_Sales_Model_Order_Status_History::CUSTOMER_NOTIFICATION_NOT_APPLICABLE. Confusingly, using false will lead to the notification being sent.

此代码块有效-修改订单状态，添加仅在后端可见且不会触发向客户端的通知电子邮件的注释:

This code block works - revise order status, adding a comment that is visible only on the backend and will not trigger a notification e-mail to the client:

$historyItem = $order->addStatusHistoryComment('some comment', 'complete');
$historyItem->setIsVisibleOnFront(false);
$historyItem->setIsCustomerNotified(Mage_Sales_Model_Order_Status_History::CUSTOMER_NOTIFICATION_NOT_APPLICABLE);
$historyItem->save();
$order->save();