Which controller is used when bulk printing invoices? (Magento1.9)

Question

On the orders grid, when using the Action Print Invoices, which controller is used to generate the invoices?

Answer 1

You can see by the source code that the called path is admin/sales_invoice/pdfinvoices. So you can look for a pdfinvoicesAction function inside the code: you will find two, one for each of this files: app/code/core/Mage/Adminhtml/Controller/Sales/Invoice.php app/code/core/Mage/Adminhtml/controllers/Sales/OrderController.php

For the admin router, the file you're looking for (admin/sales_invoice) is: app/code/core/Mage/Adminhtml/controllers/Sales/InvoiceController.php, that extends the first file.