how is variable pass to tpl?

Hi, I'm new to opencart and have a basic question about the core of opencart.
Can anybody tell me how is the variable being pass to tpl?

on the tpl files, I see alot of $variable but have no idea where they come from.

thanks!
-Ken

This is an example of how to do it:
http://forum.opencart.com/viewtopic.php ... 60#p146671

Basically you create the variable in the controller file that calls the tpl file

Ex
Then in the tpl file you would call

thanks! that's helpful

Hi Qphoria,

I'm using Opencart 1.5.4.
I need to echo $link['href'] within product.tpl.
Just type echo $link['href'] in the product.tpl will echo nothing.

We can easily echo $link['href'] in header.tpl, like this code (for canonical link): How to echo it in product.tpl?

Thank you..