Example of Caching with Core

<?php

class UserController extends Zend_Controller_Action
{
    protected $_cache;

    public function init()
    {
        $this->_cache = Zend_Cache('Core','File', array ('automatic_serialization' => true), array ('cache_dir' => APPLICATION_PATH . '/cache));
    }

    public function getUserAction()
    {
         $userId = $this->getRequest()->getParam('id', 0);
         if (!$user = $this->_cache->load('USER_FROM_DB_' . $userId)) {
             $user = new Application_Model_User();
             $userMapper = new Application_Model_UserMapper();
             $userMapper->find($user, $userId);
             $this->_cache->save($user, 'USER_FROM_DB_' . $userId);
         }
         // value of $user now is an Application_Model_User instance
         ...
    }
}