..note::

Under PHP 5.3, you cannot proxy the session handler interface for native PHP handlers,

only user handlers so if you write proxies, be aware they will only work for user-land

session save handlers.

Before PHP 5.4, you can only proxy user-land save handlers but not

native PHP save handlers.

.. _`php.net/session.customhandler`:http://php.net/session.customhandler

.. _`php.net/session.configuration`:http://php.net/session.configuration