Smarty

[Fria]

Hello,
I'm building a small reservation system for a product. When the form is submitted an email is sent to the user that he has successfully reserved a copy.
I would like to include in this email a unique reservation order, lets say from 1 to 999.
The form is processed through one .tpl file in which there is an include for 2 other .tpl files: one with email subject and one with email content.
I'd like to put a counter on every reservation and send it in the email content.

Is there a global counter of some sort? Or perhaps there's an easier way to do this?

Kind regards!

EDIT: I know that counter is global, but Im not sure how to use it in this case

[U.Tews]

The {counter} is global between main template and it's subtemplate. It's not global between page calls.
You can use also in your template the PHP function uniqid() to get a unique number.
See http://php.net/manual/en/function.uniqid.php