Usage of Zend_Controller_Plugin plug-in in Zend Framework

This article mainly introduces the usage of the Zend_Controller_Plugin plug-in in the Zend Framework tutorial. It analyzes the principles of the Zend_Controller_Plugin plug-in in detail in the form of examples, usage methods and related precautions. Friends in need can refer to the following

Examples of this article Learn how to use the Zend_Controller_Plugin plug-in in the Zend Framework tutorial. Share it with everyone for your reference, the details are as follows:

Additional functions can be added to the front-end controller through Zend_Controller_Plugin. Convenient for w some special functions. The following is a brief introduction to Zend_Controller_Plugin.

Basic implementation of Zend_Controller_Plugin

├── Plugin
│ ├── Abstract.php
│ ├── ActionStack.php
│ ├── Broker.php
│ ├── ErrorHandler.php
│ └── PutHandler.php

##Zend_Controller_Plugin_Abstract

abstract class Zend_Controller_Plugin_Abstract
{
 protected $_request;
 protected $_response;
 public function setRequest(Zend_Controller_Request_Abstract $request)
 {
  $this->_request = $request;
  return $this;
 }
 public function getRequest()
 {
  return $this->_request;
 }
 public function setResponse(Zend_Controller_Response_Abstract $response)
 {
  $this->_response = $response;
  return $this;
 }
 public function getResponse()
 {
  return $this->_response;
 }
 /**
  * Called before Zend_Controller_Front begins evaluating the
  * request against its routes.
  *
  * @param Zend_Controller_Request_Abstract $request
  * @return void
  */
 public function routeStartup(Zend_Controller_Request_Abstract $request)
 {}
 /**
  * Called after Zend_Controller_Router exits.
  *
  * Called after Zend_Controller_Front exits from the router.
  *
  * @param Zend_Controller_Request_Abstract $request
  * @return void
  */
 public function routeShutdown(Zend_Controller_Request_Abstract $request)
 {}
 /**
  * Called before Zend_Controller_Front enters its dispatch loop.
  *
  * @param Zend_Controller_Request_Abstract $request
  * @return void
  */
 public function dispatchLoopStartup(Zend_Controller_Request_Abstract $request)
 {}
 /**
  * Called before an action is dispatched by Zend_Controller_Dispatcher.
  *
  * This callback allows for proxy or filter behavior. By altering the
  * request and resetting its dispatched flag (via
  * {@link Zend_Controller_Request_Abstract::setDispatched() setDispatched(false)}),
  * the current action may be skipped.
  *
  * @param Zend_Controller_Request_Abstract $request
  * @return void
  */
 public function preDispatch(Zend_Controller_Request_Abstract $request)
 {}
 /**
  * Called after an action is dispatched by Zend_Controller_Dispatcher.
  *
  * This callback allows for proxy or filter behavior. By altering the
  * request and resetting its dispatched flag (via
  * {@link Zend_Controller_Request_Abstract::setDispatched() setDispatched(false)}),
  * a new action may be specified for dispatching.
  *
  * @param Zend_Controller_Request_Abstract $request
  * @return void
  */
 public function postDispatch(Zend_Controller_Request_Abstract $request)
 {}
 /**
  * Called before Zend_Controller_Front exits its dispatch loop.
  *
  * @return void
  */
 public function dispatchLoopShutdown()
 {}
}

The Zend_Controller_Plugin_Abstract statement defines several key event locations during the running process of Zend_Controller. Users can perform related operations on requests at specified locations and corresponding objects through specified methods.

The description of the methods in Zend_Controller_Plugin_Abstract is as follows:

routeStartup() is called before Zend_Controller_Front sends a request to the registered router.

routeShutdown() is called after the router completes routing of the request.
dispatchLoopStartup() is called before Zend_Controller_Front enters its dispatch loop.
preDispatch() is called before the action is dispatched by the dispatcher. This callback method allows proxying or filtering behavior. By modifying the request and resetting the dispatch flag (using Zend_Controller_Request_Abstract::setDispatched(false)) the current action can be skipped or replaced.
postDispatch() is called after the action is dispatched by the dispatcher. This callback method allows proxying or filtering behavior. New actions can be specified for distribution by modifying the request and resetting the distribution flag (using Zend_Controller_Request_Abstract::setDispatched(false)).
dispatchLoopShutdown() is called after Zend_Controller_Front has exited its dispatch loop.

Default plug-ins provided by Zend_Controller_Plugin:

Zend_Controller_Plugin_Broker: Plug-in broker, used to register and manage custom Zend_Controller plug-ins. For specific usage, please refer to the class code.

Zend_Controller_Plugin_ActionStack: Used to manage action stacks. For specific usage, please refer to the class code.
Zend_Controller_Plugin_ErrorHandler: Used to handle thrown exceptions. For specific usage, please refer to the class code.
Zend_Controller_Plugin_PutHandler: Used to handle the request operation PUT. For specific usage, please refer to the class code.

Zend_Controller_Plugin_Broker

<?php
/** Zend_Controller_Plugin_Abstract */
require_once &#39;Zend/Controller/Plugin/Abstract.php&#39;;
class Zend_Controller_Plugin_Broker extends Zend_Controller_Plugin_Abstract
{
 protected $_plugins = array();
 /**
  * Register a plugin.
  *
  * @param Zend_Controller_Plugin_Abstract $plugin
  * @param int $stackIndex
  * @return Zend_Controller_Plugin_Broker
  */
 public function registerPlugin(Zend_Controller_Plugin_Abstract $plugin, $stackIndex = null)
 {
  if (false !== array_search($plugin, $this->_plugins, true)) {
   require_once &#39;Zend/Controller/Exception.php&#39;;
   throw new Zend_Controller_Exception(&#39;Plugin already registered&#39;);
  }
  $stackIndex = (int) $stackIndex;
  if ($stackIndex) {
   if (isset($this->_plugins[$stackIndex])) {
    require_once &#39;Zend/Controller/Exception.php&#39;;
    throw new Zend_Controller_Exception(&#39;Plugin with stackIndex "&#39; . $stackIndex . &#39;" already registered&#39;);
   }
   $this->_plugins[$stackIndex] = $plugin;
  } else {
   $stackIndex = count($this->_plugins);
   while (isset($this->_plugins[$stackIndex])) {
    ++$stackIndex;
   }
   $this->_plugins[$stackIndex] = $plugin;
  }
  $request = $this->getRequest();
  if ($request) {
   $this->_plugins[$stackIndex]->setRequest($request);
  }
  $response = $this->getResponse();
  if ($response) {
   $this->_plugins[$stackIndex]->setResponse($response);
  }
  ksort($this->_plugins);
  return $this;
 }
 /**
  * Unregister a plugin.
  *
  * @param string|Zend_Controller_Plugin_Abstract $plugin Plugin object or class name
  * @return Zend_Controller_Plugin_Broker
  */
 public function unregisterPlugin($plugin)
 {
  if ($plugin instanceof Zend_Controller_Plugin_Abstract) {
   // Given a plugin object, find it in the array
   $key = array_search($plugin, $this->_plugins, true);
   if (false === $key) {
    require_once &#39;Zend/Controller/Exception.php&#39;;
    throw new Zend_Controller_Exception(&#39;Plugin never registered.&#39;);
   }
   unset($this->_plugins[$key]);
  } elseif (is_string($plugin)) {
   // Given a plugin class, find all plugins of that class and unset them
   foreach ($this->_plugins as $key => $_plugin) {
    $type = get_class($_plugin);
    if ($plugin == $type) {
     unset($this->_plugins[$key]);
    }
   }
  }
  return $this;
 }
 /**
  * Is a plugin of a particular class registered?
  *
  * @param string $class
  * @return bool
  */
 public function hasPlugin($class)
 {
  foreach ($this->_plugins as $plugin) {
   $type = get_class($plugin);
   if ($class == $type) {
    return true;
   }
  }
  return false;
 }
 /**
  * Retrieve a plugin or plugins by class
  *
  * @param string $class Class name of plugin(s) desired
  * @return false|Zend_Controller_Plugin_Abstract|array Returns false if none found, plugin if only one found, and array of plugins if multiple plugins of same class found
  */
 public function getPlugin($class)
 {
  $found = array();
  foreach ($this->_plugins as $plugin) {
   $type = get_class($plugin);
   if ($class == $type) {
    $found[] = $plugin;
   }
  }
  switch (count($found)) {
   case 0:
    return false;
   case 1:
    return $found[0];
   default:
    return $found;
  }
 }
 /**
  * Retrieve all plugins
  *
  * @return array
  */
 public function getPlugins()
 {
  return $this->_plugins;
 }
 /**
  * Set request object, and register with each plugin
  *
  * @param Zend_Controller_Request_Abstract $request
  * @return Zend_Controller_Plugin_Broker
  */
 public function setRequest(Zend_Controller_Request_Abstract $request)
 {
  $this->_request = $request;
  foreach ($this->_plugins as $plugin) {
   $plugin->setRequest($request);
  }
  return $this;
 }
 /**
  * Get request object
  *
  * @return Zend_Controller_Request_Abstract $request
  */
 public function getRequest()
 {
  return $this->_request;
 }
 /**
  * Set response object
  *
  * @param Zend_Controller_Response_Abstract $response
  * @return Zend_Controller_Plugin_Broker
  */
 public function setResponse(Zend_Controller_Response_Abstract $response)
 {
  $this->_response = $response;
  foreach ($this->_plugins as $plugin) {
   $plugin->setResponse($response);
  }
  return $this;
 }
 /**
  * Get response object
  *
  * @return Zend_Controller_Response_Abstract $response
  */
 public function getResponse()
 {
  return $this->_response;
 }
 /**
  * Called before Zend_Controller_Front begins evaluating the
  * request against its routes.
  *
  * @param Zend_Controller_Request_Abstract $request
  * @return void
  */
 public function routeStartup(Zend_Controller_Request_Abstract $request)
 {
  foreach ($this->_plugins as $plugin) {
   try {
    $plugin->routeStartup($request);
   } catch (Exception $e) {
    if (Zend_Controller_Front::getInstance()->throwExceptions()) {
     throw new Zend_Controller_Exception($e->getMessage() . $e->getTraceAsString(), $e->getCode(), $e);
    } else {
     $this->getResponse()->setException($e);
    }
   }
  }
 }
 /**
  * Called before Zend_Controller_Front exits its iterations over
  * the route set.
  *
  * @param Zend_Controller_Request_Abstract $request
  * @return void
  */
 public function routeShutdown(Zend_Controller_Request_Abstract $request)
 {
  foreach ($this->_plugins as $plugin) {
   try {
    $plugin->routeShutdown($request);
   } catch (Exception $e) {
    if (Zend_Controller_Front::getInstance()->throwExceptions()) {
     throw new Zend_Controller_Exception($e->getMessage() . $e->getTraceAsString(), $e->getCode(), $e);
    } else {
     $this->getResponse()->setException($e);
    }
   }
  }
 }
 /**
  * Called before Zend_Controller_Front enters its dispatch loop.
  *
  * During the dispatch loop, Zend_Controller_Front keeps a
  * Zend_Controller_Request_Abstract object, and uses
  * Zend_Controller_Dispatcher to dispatch the
  * Zend_Controller_Request_Abstract object to controllers/actions.
  *
  * @param Zend_Controller_Request_Abstract $request
  * @return void
  */
 public function dispatchLoopStartup(Zend_Controller_Request_Abstract $request)
 {
  foreach ($this->_plugins as $plugin) {
   try {
    $plugin->dispatchLoopStartup($request);
   } catch (Exception $e) {
    if (Zend_Controller_Front::getInstance()->throwExceptions()) {
     throw new Zend_Controller_Exception($e->getMessage() . $e->getTraceAsString(), $e->getCode(), $e);
    } else {
     $this->getResponse()->setException($e);
    }
   }
  }
 }
 /**
  * Called before an action is dispatched by Zend_Controller_Dispatcher.
  *
  * @param Zend_Controller_Request_Abstract $request
  * @return void
  */
 public function preDispatch(Zend_Controller_Request_Abstract $request)
 {
  foreach ($this->_plugins as $plugin) {
   try {
    $plugin->preDispatch($request);
   } catch (Exception $e) {
    if (Zend_Controller_Front::getInstance()->throwExceptions()) {
     throw new Zend_Controller_Exception($e->getMessage() . $e->getTraceAsString(), $e->getCode(), $e);
    } else {
     $this->getResponse()->setException($e);
     // skip rendering of normal dispatch give the error handler a try
     $this->getRequest()->setDispatched(false);
    }
   }
  }
 }
 /**
  * Called after an action is dispatched by Zend_Controller_Dispatcher.
  *
  * @param Zend_Controller_Request_Abstract $request
  * @return void
  */
 public function postDispatch(Zend_Controller_Request_Abstract $request)
 {
  foreach ($this->_plugins as $plugin) {
   try {
    $plugin->postDispatch($request);
   } catch (Exception $e) {
    if (Zend_Controller_Front::getInstance()->throwExceptions()) {
     throw new Zend_Controller_Exception($e->getMessage() . $e->getTraceAsString(), $e->getCode(), $e);
    } else {
     $this->getResponse()->setException($e);
    }
   }
  }
 }
 /**
  * Called before Zend_Controller_Front exits its dispatch loop.
  *
  * @param Zend_Controller_Request_Abstract $request
  * @return void
  */
 public function dispatchLoopShutdown()
 {
  foreach ($this->_plugins as $plugin) {
   try {
    $plugin->dispatchLoopShutdown();
   } catch (Exception $e) {
    if (Zend_Controller_Front::getInstance()->throwExceptions()) {
     throw new Zend_Controller_Exception($e->getMessage() . $e->getTraceAsString(), $e->getCode(), $e);
    } else {
     $this->getResponse()->setException($e);
    }
   }
  }
 }
}

##Zend_Controller_Plugin_ActionStack

<?php
/** Zend_Controller_Plugin_Abstract */
require_once &#39;Zend/Controller/Plugin/Abstract.php&#39;;
/** Zend_Registry */
require_once &#39;Zend/Registry.php&#39;;
class Zend_Controller_Plugin_ActionStack extends Zend_Controller_Plugin_Abstract
{
 /** @var Zend_Registry */
 protected $_registry;
 /**
  * Registry key under which actions are stored
  * @var string
  */
 protected $_registryKey = &#39;Zend_Controller_Plugin_ActionStack&#39;;
 /**
  * Valid keys for stack items
  * @var array
  */
 protected $_validKeys = array(
  &#39;module&#39;,
  &#39;controller&#39;,
  &#39;action&#39;,
  &#39;params&#39;
 );
 /**
  * Flag to determine whether request parameters are cleared between actions, or whether new parameters
  * are added to existing request parameters.
  *
  * @var Bool
  */
 protected $_clearRequestParams = false;
 /**
  * Constructor
  *
  * @param Zend_Registry $registry
  * @param string $key
  * @return void
  */
 public function __construct(Zend_Registry $registry = null, $key = null)
 {
  if (null === $registry) {
   $registry = Zend_Registry::getInstance();
  }
  $this->setRegistry($registry);
  if (null !== $key) {
   $this->setRegistryKey($key);
  } else {
   $key = $this->getRegistryKey();
  }
  $registry[$key] = array();
 }
 /**
  * Set registry object
  *
  * @param Zend_Registry $registry
  * @return Zend_Controller_Plugin_ActionStack
  */
 public function setRegistry(Zend_Registry $registry)
 {
  $this->_registry = $registry;
  return $this;
 }
 /**
  * Retrieve registry object
  *
  * @return Zend_Registry
  */
 public function getRegistry()
 {
  return $this->_registry;
 }
 /**
  * Retrieve registry key
  *
  * @return string
  */
 public function getRegistryKey()
 {
  return $this->_registryKey;
 }
 /**
  * Set registry key
  *
  * @param string $key
  * @return Zend_Controller_Plugin_ActionStack
  */
 public function setRegistryKey($key)
 {
  $this->_registryKey = (string) $key;
  return $this;
 }
 /**
  * Set clearRequestParams flag
  *
  * @param bool $clearRequestParams
  * @return Zend_Controller_Plugin_ActionStack
  */
 public function setClearRequestParams($clearRequestParams)
 {
  $this->_clearRequestParams = (bool) $clearRequestParams;
  return $this;
 }
 /**
  * Retrieve clearRequestParams flag
  *
  * @return bool
  */
 public function getClearRequestParams()
 {
  return $this->_clearRequestParams;
 }
 /**
  * Retrieve action stack
  *
  * @return array
  */
 public function getStack()
 {
  $registry = $this->getRegistry();
  $stack = $registry[$this->getRegistryKey()];
  return $stack;
 }
 /**
  * Save stack to registry
  *
  * @param array $stack
  * @return Zend_Controller_Plugin_ActionStack
  */
 protected function _saveStack(array $stack)
 {
  $registry = $this->getRegistry();
  $registry[$this->getRegistryKey()] = $stack;
  return $this;
 }
 /**
  * Push an item onto the stack
  *
  * @param Zend_Controller_Request_Abstract $next
  * @return Zend_Controller_Plugin_ActionStack
  */
 public function pushStack(Zend_Controller_Request_Abstract $next)
 {
  $stack = $this->getStack();
  array_push($stack, $next);
  return $this->_saveStack($stack);
 }
 /**
  * Pop an item off the action stack
  *
  * @return false|Zend_Controller_Request_Abstract
  */
 public function popStack()
 {
  $stack = $this->getStack();
  if (0 == count($stack)) {
   return false;
  }
  $next = array_pop($stack);
  $this->_saveStack($stack);
  if (!$next instanceof Zend_Controller_Request_Abstract) {
   require_once &#39;Zend/Controller/Exception.php&#39;;
   throw new Zend_Controller_Exception(&#39;ArrayStack should only contain request objects&#39;);
  }
  $action = $next->getActionName();
  if (empty($action)) {
   return $this->popStack($stack);
  }
  $request = $this->getRequest();
  $controller = $next->getControllerName();
  if (empty($controller)) {
   $next->setControllerName($request->getControllerName());
  }
  $module = $next->getModuleName();
  if (empty($module)) {
   $next->setModuleName($request->getModuleName());
  }
  return $next;
 }
 /**
  * postDispatch() plugin hook -- check for actions in stack, and dispatch if any found
  *
  * @param Zend_Controller_Request_Abstract $request
  * @return void
  */
 public function postDispatch(Zend_Controller_Request_Abstract $request)
 {
  // Don&#39;t move on to next request if this is already an attempt to
  // forward
  if (!$request->isDispatched()) {
   return;
  }
  $this->setRequest($request);
  $stack = $this->getStack();
  if (empty($stack)) {
   return;
  }
  $next = $this->popStack();
  if (!$next) {
   return;
  }
  $this->forward($next);
 }
 /**
  * Forward request with next action
  *
  * @param array $next
  * @return void
  */
 public function forward(Zend_Controller_Request_Abstract $next)
 {
  $request = $this->getRequest();
  if ($this->getClearRequestParams()) {
   $request->clearParams();
  }
  $request->setModuleName($next->getModuleName())
    ->setControllerName($next->getControllerName())
    ->setActionName($next->getActionName())
    ->setParams($next->getParams())
    ->setDispatched(false);
 }
}

Zend_Controller_Plugin_ErrorHandler

<?php
/** Zend_Controller_Plugin_Abstract */
require_once &#39;Zend/Controller/Plugin/Abstract.php&#39;;
class Zend_Controller_Plugin_ErrorHandler extends Zend_Controller_Plugin_Abstract
{
 /**
  * Const - No controller exception; controller does not exist
  */
 const EXCEPTION_NO_CONTROLLER = &#39;EXCEPTION_NO_CONTROLLER&#39;;
 /**
  * Const - No action exception; controller exists, but action does not
  */
 const EXCEPTION_NO_ACTION = &#39;EXCEPTION_NO_ACTION&#39;;
 /**
  * Const - No route exception; no routing was possible
  */
 const EXCEPTION_NO_ROUTE = &#39;EXCEPTION_NO_ROUTE&#39;;
 /**
  * Const - Other Exception; exceptions thrown by application controllers
  */
 const EXCEPTION_OTHER = &#39;EXCEPTION_OTHER&#39;;
 /**
  * Module to use for errors; defaults to default module in dispatcher
  * @var string
  */
 protected $_errorModule;
 /**
  * Controller to use for errors; defaults to &#39;error&#39;
  * @var string
  */
 protected $_errorController = &#39;error&#39;;
 /**
  * Action to use for errors; defaults to &#39;error&#39;
  * @var string
  */
 protected $_errorAction = &#39;error&#39;;
 /**
  * Flag; are we already inside the error handler loop?
  * @var bool
  */
 protected $_isInsideErrorHandlerLoop = false;
 /**
  * Exception count logged at first invocation of plugin
  * @var int
  */
 protected $_exceptionCountAtFirstEncounter = 0;
 /**
  * Constructor
  *
  * Options may include:
  * - module
  * - controller
  * - action
  *
  * @param Array $options
  * @return void
  */
 public function __construct(Array $options = array())
 {
  $this->setErrorHandler($options);
 }
 /**
  * setErrorHandler() - setup the error handling options
  *
  * @param array $options
  * @return Zend_Controller_Plugin_ErrorHandler
  */
 public function setErrorHandler(Array $options = array())
 {
  if (isset($options[&#39;module&#39;])) {
   $this->setErrorHandlerModule($options[&#39;module&#39;]);
  }
  if (isset($options[&#39;controller&#39;])) {
   $this->setErrorHandlerController($options[&#39;controller&#39;]);
  }
  if (isset($options[&#39;action&#39;])) {
   $this->setErrorHandlerAction($options[&#39;action&#39;]);
  }
  return $this;
 }
 /**
  * Set the module name for the error handler
  *
  * @param string $module
  * @return Zend_Controller_Plugin_ErrorHandler
  */
 public function setErrorHandlerModule($module)
 {
  $this->_errorModule = (string) $module;
  return $this;
 }
 /**
  * Retrieve the current error handler module
  *
  * @return string
  */
 public function getErrorHandlerModule()
 {
  if (null === $this->_errorModule) {
   $this->_errorModule = Zend_Controller_Front::getInstance()->getDispatcher()->getDefaultModule();
  }
  return $this->_errorModule;
 }
 /**
  * Set the controller name for the error handler
  *
  * @param string $controller
  * @return Zend_Controller_Plugin_ErrorHandler
  */
 public function setErrorHandlerController($controller)
 {
  $this->_errorController = (string) $controller;
  return $this;
 }
 /**
  * Retrieve the current error handler controller
  *
  * @return string
  */
 public function getErrorHandlerController()
 {
  return $this->_errorController;
 }
 /**
  * Set the action name for the error handler
  *
  * @param string $action
  * @return Zend_Controller_Plugin_ErrorHandler
  */
 public function setErrorHandlerAction($action)
 {
  $this->_errorAction = (string) $action;
  return $this;
 }
 /**
  * Retrieve the current error handler action
  *
  * @return string
  */
 public function getErrorHandlerAction()
 {
  return $this->_errorAction;
 }
 /**
  * Route shutdown hook -- Ccheck for router exceptions
  *
  * @param Zend_Controller_Request_Abstract $request
  */
 public function routeShutdown(Zend_Controller_Request_Abstract $request)
 {
  $this->_handleError($request);
 }
 /**
  * Pre dispatch hook -- check for exceptions and dispatch error handler if
  * necessary
  *
  * @param Zend_Controller_Request_Abstract $request
  */
 public function preDispatch(Zend_Controller_Request_Abstract $request)
 {
  $this->_handleError($request);
 }
 /**
  * Post dispatch hook -- check for exceptions and dispatch error handler if
  * necessary
  *
  * @param Zend_Controller_Request_Abstract $request
  */
 public function postDispatch(Zend_Controller_Request_Abstract $request)
 {
  $this->_handleError($request);
 }
 /**
  * Handle errors and exceptions
  *
  * If the &#39;noErrorHandler&#39; front controller flag has been set,
  * returns early.
  *
  * @param Zend_Controller_Request_Abstract $request
  * @return void
  */
 protected function _handleError(Zend_Controller_Request_Abstract $request)
 {
  $frontController = Zend_Controller_Front::getInstance();
  if ($frontController->getParam(&#39;noErrorHandler&#39;)) {
   return;
  }
  $response = $this->getResponse();
  if ($this->_isInsideErrorHandlerLoop) {
   $exceptions = $response->getException();
   if (count($exceptions) > $this->_exceptionCountAtFirstEncounter) {
    // Exception thrown by error handler; tell the front controller to throw it
    $frontController->throwExceptions(true);
    throw array_pop($exceptions);
   }
  }
  // check for an exception AND allow the error handler controller the option to forward
  if (($response->isException()) && (!$this->_isInsideErrorHandlerLoop)) {
   $this->_isInsideErrorHandlerLoop = true;
   // Get exception information
   $error   = new ArrayObject(array(), ArrayObject::ARRAY_AS_PROPS);
   $exceptions  = $response->getException();
   $exception  = $exceptions[0];
   $exceptionType = get_class($exception);
   $error->exception = $exception;
   switch ($exceptionType) {
    case &#39;Zend_Controller_Router_Exception&#39;:
     if (404 == $exception->getCode()) {
      $error->type = self::EXCEPTION_NO_ROUTE;
     } else {
      $error->type = self::EXCEPTION_OTHER;
     }
     break;
    case &#39;Zend_Controller_Dispatcher_Exception&#39;:
     $error->type = self::EXCEPTION_NO_CONTROLLER;
     break;
    case &#39;Zend_Controller_Action_Exception&#39;:
     if (404 == $exception->getCode()) {
      $error->type = self::EXCEPTION_NO_ACTION;
     } else {
      $error->type = self::EXCEPTION_OTHER;
     }
     break;
    default:
     $error->type = self::EXCEPTION_OTHER;
     break;
   }
   // Keep a copy of the original request
   $error->request = clone $request;
   // get a count of the number of exceptions encountered
   $this->_exceptionCountAtFirstEncounter = count($exceptions);
   // Forward to the error handler
   $request->setParam(&#39;error_handler&#39;, $error)
     ->setModuleName($this->getErrorHandlerModule())
     ->setControllerName($this->getErrorHandlerController())
     ->setActionName($this->getErrorHandlerAction())
     ->setDispatched(false);
  }
 }
}

##Zend_Controller_Plugin_PutHandler

<?php
require_once &#39;Zend/Controller/Plugin/Abstract.php&#39;;
require_once &#39;Zend/Controller/Request/Http.php&#39;;
class Zend_Controller_Plugin_PutHandler extends Zend_Controller_Plugin_Abstract
{
 /**
  * Before dispatching, digest PUT request body and set params
  *
  * @param Zend_Controller_Request_Abstract $request
  */
 public function preDispatch(Zend_Controller_Request_Abstract $request)
 {
  if (!$request instanceof Zend_Controller_Request_Http) {
   return;
  }
  if ($this->_request->isPut()) {
   $putParams = array();
   parse_str($this->_request->getRawBody(), $putParams);
   $request->setParams($putParams);
  }
 }
}

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