When used with the MVC components, Zend_Layout
registers a front controller plugin that renders the layout as the
last action prior to exiting the dispatch loop. In most cases, the
default plugin will be suitable, but should you desire to write
your own, you can specify the name of the plugin class to load by
passing the pluginClass option to the
startMvc() method.
Any plugin class you write for this purpose will need to extend
Zend_Controller_Plugin_Abstract, and should accept a
layout object instance as an argument to the constructor. Otherwise,
the details of your implementation are up to you.
The default plugin class used is
Zend_Layout_Controller_Plugin_Layout.