Variable into smarty array

Hi everyone,

I often need to use var inside array.

Example:
$poste = array("1"=>"poste1", "2"=>"poste2", "3"=>"poste3");
$offre = array("1"=>array("nom"=>"myname","id_poste"=>"1")); (result from a
db query)

I assign these array to smarty.

Then into smarty:
{$poste[1]} => Poste1;

{$offre[1].nom} => myname
{$offre[1].id_poste} => 1

But {$poste[$offre[1].id_poste]} result to an error.
I try many syntax, but cant achieve my objective.

Is there's a way ? Or I need to do it into php (I do it most of time, but
not very appropriate in whole case).

Regards,
Alexandre Cognard