get session id

[tungle]

Hi,
I want to get session_id of the current session to input to my own function (after the user logged in).
When I tried

$myapp = rcmail::get_instance();
$sesID = $myapp->session->session_id();

$sesID is always null
What's wrong with my code, thanks.

[alec]

There's no such method in current Roundcube code. Just use PHP's build-in session_id() function.