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How to create invoice when order created programmatically in magento1

You can create an invoice programmatically for an order by using the below code

 

$invoice = Mage::getModel('sales/service_order', $order)->prepareInvoice();
$invoice->setRequestedCaptureCase(Mage_Sales_Model_Order_Invoice::CAPTURE_OFFLINE);
$invoice->register();
$invoice->getOrder()->setIsInProcess(true);
$transactionSave = Mage::getModel('core/resource_transaction')
    ->addObject($invoice)
    ->addObject($invoice->getOrder());
$transactionSave->save();