How to cancel Magento order programmatically

Question

I want to change the order status to 'canceled' when payment failed. I've tried the code below but the order status gets saved as processing:

        $orderId = $number8; //order id
        $order = Mage::getModel('sales/order')->load($orderId); //load order
        $order->setState(Mage_Sales_Model_Order::STATE_CANCELED, true)->save();
        $state = 'canceled';
        $status = $state;
        $comment = "Changing state to $state and status to $status Status";
        $isCustomerNotified = false; //whether customer to be notified
        $order->setState($state, $status, $comment, $isCustomerNotified);
        $order->addStatusHistoryComment("Payment Failed",
            Mage_Sales_Model_Order::STATE_CANCELED);
        $order->setStatus($status);    
       $order->save();


        $this->loadLayout();
        $this->_initLayoutMessages('checkout/session')->addError(Mage::helper('checkout')->__($errorMessage));
        $this->renderLayout();

Please assist. I have a condition in my model if(payment fails) execute code above but the order gets saved as processing instead of canceled.

Answer 1

Use only following lines of code no need to save order again & aganin:

$orderId = $number8; //order id
$order = Mage::getModel('sales/order')->load($orderId);
$order->cancel()->setState(Mage_Sales_Model_Order::STATE_CANCELED, 'canceled', 'Payment Failed', false)->save();

Second last argument is commnet & Last boolean parameter is $isCustomerNotified false in your case.

What ever payment method you are using it should have cancelAction in it you need to write following code in it:

public function cancelAction()
    {
        $orderId = $this->getRequest()->getParam('orderId');
        if ($orderId) {
            $order = Mage::getModel('sales/order')->loadByIncrementId($orderId);
            if ($order->getId()) {
                // Flag the order as 'cancelled' and save it
                $order->cancel()->setState(Mage_Sales_Model_Order::STATE_CANCELED, 'canceled', 'Gateway has declined the payment.')->save();
                Mage_Core_Controller_Varien_Action::_redirect('onestepcheckout/index/index/cc/back', array('_secure' => true));
            }
        }
    }

In my case I have this redirect path

onestepcheckout/index/index/cc/back

Put yours