Add pdf invoice creation to checkout workflow

Hi all,

Fairly new to Hikashop, I have the business version and I'm wanting to add a step to the workflow and I'm not quite sure where to begin.

Workflow would be as follows:


Add to cart -> checkout -> pay via paypal -> order confirmed -> 1: Customer receives a confirmation email with a pdf invoice attached to it 2: Administrator mailbox receives pdf invoice too.

I tried to use some pdf creation examples that I've found on www.tcpdf.org/examples.php using the tcpdf class that's available in joomla 1.5 but each time I try something then I get error 500 after clicking on checkout (after entering payment method etc.)

And there is also no way to test the notifications without actually creating an order (i.e send a test email to see what it would look like...)

So I'm starting to think that's I'm re-inventing the wheel here as many php shopping carts offer pdf invoice creation modules or addons

I guess my questions are:

Is this something Hikashop can do nativaly (and if so, how? as I can't find that anywhere)
Is there a module or a plugin that can do that?
If all the above answers are no, did someone manage to create that piece of the workflow before? I'm prepared to pay for such addon if available...

Many thanks