Description:
------------
session_decode() is returning the correct data, but it is not populating $_SESSION.  This is contrary to the documentation I found, which says the opposite should be done.  I like that session_decode() returns a value, but it should also populate $_SESSION.

Reproduce code:
---------------
$myvar = session_decode($data);
var_dump($myvar);
echo '<br />';
var_dump($_SESSION);

Expected result:
----------------
bool(false)
bool(false)

Actual result:
--------------
bool(false)
array(0) { }