How to use zend autoloader ??

zend autoloader tutorial >>

File Structure:

library

       |--- Amazon


                 |--- Action.php [ with class Amazon_Action ]

In Bootstrap.php

public function _initAutoloaders()
{
    $loader = Zend_Loader_Autoloader::getInstance();
    $loader->registerNamespace('Amazon_');
}

In IndexController or any..

$Amazon_Action = new Amazon_Action();

Now use custom file structure:
In application

   classes
       |--- googles
             |--- nels
                    |--- action.php [with calss name My_Classe_Google_Nel_Action]

             |--- test.php [with class My_Classe_Google_Test] 

       |---demo.php [with class My_Classe_Demo]

In Bootstrap.php

public function _initAutoloaders()
{
 $resourceLoader = new Zend_Loader_Autoloader_Resource(array(
      'basePath' =>  APPLICATION_PATH . '/',
         'namespace' => 'My',
     ));
 
 $resourceLoader->addResourceType('demo','classes/','Classe');

 $resourceLoader->addResourceType('test', 'classes/googles/', 'Classe_Google');

 $resourceLoader->addResourceType('action', 'classes/googles/nels/', 'Classe_Google_Nel');
 
 }

In Controller

$opt1 =  new My_Classe_Google_Nel_Action();
$opt2 = new My_Classe_Google_Test();
$opt3 = new  My_Classe_Demo();

For more advance use of autoloader follow thins link..
http://nelsondesai.blogspot.in/2012/09/advanced-use-of-autoloader-in-zend.html
http://framework.zend.com/manual/1.12/en/learning.autoloading.resources.html

For more details mail me on nelson.desai@gmail.com or comments here.

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Thank You

Nelson Desai