Zend Sessions Problem (beginner) - zend-framework

Question

I'm teaching myself Zend am and having a problem with using my session to call a View Helper action.
My controller:
<?php
class SessionController extends Zend_Controller_Action
{
protected $session;
public function init() //Like a constructor
{
$this->_helper->viewRenderer->setNoRender(); // Will not automatically go to views/Session
$this->_helper->getHelper('layout')->disableLayout(); // Will not load the layout
}
public function preDispatch() //Invokes code before rendering. Good for sessions/cookies etc.
{
$this->session = new Zend_Session_Namespace(); //Create session
if(!$this->session->__isset('view'))
{
$this->session->view = $this->view; //if the session doesn't exist, make it's view default
}
}
public function printthingAction()
{
echo $this->session->view->tabbedbox($this->getRequest()->getParam('textme'));
}
}
?>
My view helper
<?php
class App_View_Helper_Tabbedbox extends Zend_View_Helper_Abstract
{
public $wordsauce = "";
public function tabbedbox($message = "")
{
$this->wordsauce .= $message;
return '<p>' . $this->wordsauce . "</p>";
}
}
?>
My view:
<p>I GOT TO THE INDEX VIEW</p>
<input id='textme' type='input'/>
<input id='theButton' type='submit'/>
<div id="putstuffin"></div>
<script type="text/javascript">
$(function()
{
$("#theButton").click(function()
{
$.post(
"session/printthing",
{'textme' : $("#textme").val()},
function(response)
{
$("#putstuffin").append(response);
});
});
});
</script>
The first time I click on theButton, it works, and appends my word like it's supposed to. For every time after, though, it gives me this error message:
Warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, '__PHP_Incomplete_Class::tabbedbox' was given in C:\xampp\htdocs\BC\library\Zend\View\Abstract.php on line 341
I copied the Zendcasts.com video almost line for line, and it's still not working. It seems like my session is getting destroyed or something. I would be forever grateful to anyone who could tell me what's happening.

Answer 1

When you store an object in the session, you're really storing a serialized representation of it. The __PHP_Incomplete_Class::tabbedbox occurs because, on subsequent requests, PHP has forgotten what an App_View_Helper_Tabbedbox is.
The solution: make sure you include the App_View_Helper_Tabbedbox class file before Zend_Session::start() is called.
And, the best way to do that is to place this at the opening of your app:
require_once 'Zend/Loader.php';
Zend_Loader::registerAutoload();