Zend-Error-Zend_Loader::registerAutoload is deprecated as of 1.8.0 and will be removed with 2.0.0

This warning appear's because you have the lines:

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

Replace them with
 
require_once 'Zend/Loader/Autoloader.php';
$loader = Zend_Loader_Autoloader::getInstance();
$loader->registerNamespace('App_');


Where 'App_' is the name of a directory on your include path that has classes within it that follow the Zend Framework naming convention, so change it as appropriate and add more if you need them.