I am trying to get the last order id for an order so that I can create an invoice and shipment automatically but I can't seems to load the correct orderId to perform the action...

Here is how I am trying to load the orderId Observer.php

$order = Mage::getModel('sales/order')->load($orderid);
$orderIncrementId = $order->getIncrementId();

If the orderId is not present throw exception

$order = Mage::getModel('sales/order')
if (!$order->getId()) {
        Mage::throwException("Order does not exist, for the Shipment process to complete");

The problem is if I pass in a static orderId no exception is thrown

$orderIncrementId = '1100000023-4';

But when I try to load it through the Model I can't

Can anyone show me how to get the orderId for an order please?

  • What event are you using for the observer? Aug 2, 2014 at 16:53
  • @VladimirKerkhoff I am using sales_order_invoice_register for the Observer Aug 2, 2014 at 19:10

3 Answers 3


The accepted answer didn't work for me. Digging into it turned out, following solution works for me:


Get the latest order_id from the session like this:


Here is also another way to do it.


To get the last order ID in Magento:

   $orders = Mage::getModel('sales/order')->getCollection()
    echo $orders->getEntityId()
  • 2
    This is correct, but there is an issue. getFirstItem loads the full collection. This could be a problem if you have a lot of orders. You should add a limit of 1 to the collection, to ensure that only one item is loaded.
    – Marius
    Aug 4, 2014 at 10:30
  • I checked it. getFirstItem would not show all the orders information. It shows only one order information. Aug 4, 2014 at 10:47
  • Thanks @Marius I've ended up using Mage::getSingleton('checkout/session')->getLastRealOrderId(); but I am concious that there is a difference for orders created in Admin Aug 4, 2014 at 10:48
  • 1
    I'm not saying it will show all the other orders information. I'm saying that it just retrieves them from the db and they are useless in this case. Check how Varien_Data_Collection::getFirstItem works. If you have 100k orders, just to retrieve the last order number this way it will take ages.
    – Marius
    Aug 4, 2014 at 10:51
  • ok.That's right. Aug 4, 2014 at 11:36

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