I think it is better you ask vlad about this.
I found this maybe it can help you.

Last edited by gugu (2011-12-11 16:15:06)

Hi Guys,

I am using 2.7, I just wanted the payment page to show an automatic price conversion rate for whatever payment plan they chose.

I'll give your code a try misulicus and let you know.

Cheers.

well usually what i do is look in the lib.FILE
for example inside lib.account_upgrade wich is responsible for the account/upgrade page.
and lets say i want to see how the base page that shows the packages work, so i go to the function for that page: show_packages in this case inside of wich i notice :

$fields[$i]...

wich means that the $fields array gets different values:

$fields[$i]['package_name'] = $obj->name; --> stores the name of package
$fields[$i]['package_term'] = $obj->term; --> stores the duration of the package
etc.

and then a bit lower to the end of the function there is the assignment thing that assigns a $variable value to a {template_tag} in this case:

$TEMPLATE->assign("package_fields", $fields);

wich means that package_fields holds all the $fields array wich holds multiple values.
so then on the account_upgrade.tpl page i look for BEGIN package_fields wich tells me that inside that BEGIN loop i can use the different $fields values since its an array.
and you can see that already it shows some data like:
{package_name} or {package_description} wich you will notice they are assigned in the lib. file.

In conclusion i think its an easy way to see wich "variables" you can use on specific template pages of the website.
If i`m wrong with something feel free to correct