if I try this code with sesion.use.trans-sid enabled:

<?php
session_start();
?>
<a href="page.php">hello</a>

the sessionID is appended to the link, if I don't accept cookies.

But if I try this:

<?php
session_start();
ob_start("ob_gzhandler");
?>
<a href="script.php">hello</a>

it doesn't work anymore. I know it works with setting of zlib.output_compression, but should that be the only way to do so?