session_register() twice?

From:	Javier	Date:	Fri, 26 Apr 2002 21:10:31 +0000
Subject:	session_register() twice?
Groups:	php.general
Request:	Send a blank email to php-general+get-94815@lists.php.net to get a copy of this message

What happens if I call session_start() twice? Does it creates another session? Cause something odd is going on with this simple script.

     if(!SesionActiva()){ -It checkes wether there an active session
         SesionCrear(); - It creates the session
     }

     /*SesionActivar();*/

     echo "<pre>" . session_id()."</pre>";

     MostrarPaginaPrincipal(); --Showing the main page.