Need help more regarding php

[Guest]

Hi,

I am currently looking at how the invoice is generated within oscommerce.

i looking at how it does the price calculations....

 

Can someone please explain how the line below works i.e. what does the "->" operator do... what does $currencies do and is it a function..?

$currencies->format($order->products[$i]['final_price'], true, $order->info['currency'], $order->info['currency_value'])

 

Here is another line from invoice.php.

Just need to understand how is this working, In this case i know this is calling a function called tep_add_tax(), which adds calculates tax for each of the product.

 

$currencies->format(tep_add_tax($order->products[$i]['final_price'],$order->products[$i]['tax']), true, $order->info['currency'], $order->info['currency_value'])

 

what does true do in the above line?

 

 

thanks in advance....