PHP in Templates and Template Conditionals

[dan4]

Hello

PHP version :

$code="blablabla";
<a href="http://domain.com/index.php?<?php echo $code; ?>">link</a>

How to in templates mybb ?

Template MyBB version :

{$code="blablabla";}
<a href="http://domain.com/index.php?{$code}">link</a>

is ok?

I'm french...sorry