This is known issue. And (IMO) it is a bug, not feature.
--Jani
On Tue, 13 Nov 2001, Christoph Kassen wrote:
>While testing 4.1.0RC2 I noticed that the following script does not work as
>expected:
>
><?php
>session_register("count");
>echo $_SESSION["count"]++;
>
>session_unregister("count");
>?>
>
>When I set register_globals=off the counter is incrementing although PHP has
>to unregister the variable from the session.
>Further tests showed that when register_globals is set to 'on', the variable
>is unregistered properly.
>It also works when you use the global variable $count.
>
>I noticed that when you replace session_unregister("count") with
>unset($_SESSION['count']); the variable is also properly
>deleted/"unregistered".
>
>I think that this is not they way it should work and PHP should be fixed so
>that session_unregister properly deletes the variable.
>But if this is the intended behavior of php now, then it should be
>documented.
>
>I tested on:
>Windows 2000 Pro + SP2,
>Apache 1.3.22,
>fresh PHP 4.1.0RC2 build, created with VC++ 6
>using only the extensions build in by default
>
>
>Christoph
>
>
>
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