_on_close']</span></code></p>
<p>This option is still usable, but only for backwards compatibility
purposes and it should be otherwise removed. The same effect is
achieved by setting <code class="docutils literal"><span class="pre">$config['sess_expiration']</span></code> to 0.</p>
</li>
<li><p class="first">Check “flashdata” for collisions with “userdata”</p>
<p>Flashdata is now just regular “userdata”, only marked for deletion on
the next request. In other words: you can’t have both “userd