How to upgrade Zend_Loader from 1.7 to 1.8?

I have been using this, and it works fine in 1.7, but not in 1.8.

    require_once('Zend/Loader.php');
    Zend_Loader::registerAutoload();

It says it's deprecated, and that I should use Zend_Loader_Autoloader instead, but I can't seem to get it to work. Any suggestions?

Solution

As a bare minimum you'll need to change the code to

require_once 'Zend/Loader/Autoloader.php';
$loader = Zend_Loader_Autoloader::getInstance();

If you have some code that is not namespaced, like models, you'll need this too:

$loader->setFallbackAutoloader(true);