What directory is used for Zend plugins?

Question

Let's say I have the following in my ini file:

resources.frontController.plugins.auth = AuthPlugin

Where should the AuthPlugin class be placed? Let's say I would like it under controllers/plugins.

UPDATE:

Based on the suggestions below I am still having trouble. Let me be exact in what I currently have:

1) main part of application.ini

includePaths.library = APPLICATION_PATH "/../library"
bootstrap.path = APPLICATION_PATH "/Bootstrap.php"
bootstrap.class = "Bootstrap"
resources.layout.layoutPath = APPLICATION_PATH "/layouts/scripts"
resources.view[] =
resources.frontController.controllerDirectory = APPLICATION_PATH "/controllers"
resources.frontController.plugins.authplugin.class = "AuthPlugin"

2) my Bootstrap.php has nothing (I had lots of things in there, but still get the error with nothing):

class Bootstrap extends Zend_Application_Bootstrap_Bootstrap
{
}

3) I have an AuthPlugin.php class in application/plugins directory

class AuthPlugin extends Zend_Controller_Plugin_Abstract
{
    public function preDispatch(Zend_Controller_Request_Abstract $request)
        { 
           // code here
        }
}

I get the following error:

Fatal error: Class 'AuthPlugin' not found in C:\[my dir structure here]\Application\Resource\Frontcontroller.php on line 111

I assume I'm missing something obvious here. Thanks in advance. Zend Framework 1.10

Answer 1

This is how I register a plugin named Foo_Plugin_SuperDuperPlugin in my application config:

resources.frontController.plugins.superduperplugin.class = "Foo_Plugin_SuperDuperPlugin"

The plugin is located at
APPLICATION_PATH/plugins/Foo_Plugin_SuperDuperPlugin.php and is autoloaded from there because the Resource Module Autoloader automatically looks in that (recommended) location for plugin type resources. If I wanted to load the plugin from, say,
APPLICATION_PATH/controllers/plugins/Foo_Plugin_SuperDuperPlugin.php then I would register a new resource loader with the autoloader and define a type of resource named 'plugin' and the path to those plugin resources. So in my bootstrap.php

protected function _initAutoloader()
{
    $autoloader = new Zend_Loader_Autoloader_Resource(
        array(
            'basePath'      => APPLICATION_PATH,
            'namespace'     => 'Foo',
            'resourceTypes' => array(
                'plugin' => array(
                    'path'      => 'controllers/plugins',
                    'namespace' => 'Plugin',
                )
            )
        )
    );
}

and then I need to ensure that this method is bootstrapped before the SuperDuperPlugin is registered (which, in this example, happens when the application config is read resources.frontcontroller.plugins.superduperplugin.class = ...). This can be achieved by placing the _initAutoloader method at the top of the bootstrap.php or by calling $this->bootstrap('autoLoader'); from any other _init method, before the frontController resource is initialised.

UPDATED: Try adding this to your bootstrap:

protected function _initAutoloader()
{
    $autoloader = new Zend_Loader_Autoloader_Resource(
        array(
            'basePath'      => APPLICATION_PATH,
            'resourceTypes' => array(
                'plugin' => array(
                    'path'      => 'controllers/plugins',
                    'namespace' => '',
                )
            )
        )
    );
}

and maybe even leave off the namespace. Or: add appnamespace = "Foo" to your config and rename the class to Foo_Plugin_AuthPlugin.