本文实例讲述了Zend Framework教程之Zend_Controller_Plugin插件用法。分享给大家供大家参考，具体如下：
通过Zend_Controller_Plugin可以向前端控制器增加附加的功能。便于w一些特殊功能。以下是Zend_Controller_Plugin的简单介绍。
Zend_Controller_Plugin的基本实现
├── Plugin
│ ├── Abstract.php
│ ├── ActionStack.php
│ ├── Broker.php
│ ├── ErrorHandler.php
│ └── PutHandler.php
Zend_Controller_Plugin_Abstract
abstract class Zend_Controller_Plugin_Abstract{ protected $_request; protected $_response; public funct<i>*本5文来源gaodai$ma#com搞$$代**码)网@</i><img>搞代码gaodaima</img>ion 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() {}}
Zend_Controller_Plugin_Abstract声明定义了Zend_Controller运行过程中的几个关键事件位置。用户可以通过指定的方法，对指定位置的请求和相应对象进行相关操作。
Zend_Controller_Plugin_Abstract中方法的描述如下：
routeStartup() 在 Zend_Controller_Front 向注册的 路由器 发送请求前被调用。
routeShutdown()在 路由器 完成请求的路由后被调用。
dispatchLoopStartup() 在 Zend_Controller_Front 进入其分发循环（dispatch loop）前被调用。
preDispatch() 在动作由 分发器 分发前被调用。该回调方法允许代理或者过滤行为。通过修改请求和重设分发标志位（利用 Zend_Controller_Request_Abstract::setDispatched(false) ）当前动作可以跳过或者被替换。
postDispatch() 在动作由 分发器 分发后被调用。该回调方法允许代理或者过滤行为。通过修改请求和重设分发标志位（利用 Zend_Controller_Request_Abstract::setDispatched(false) ）可以指定新动作进行分发。
dispatchLoopShutdown() 在 Zend_Controller_Front 推出其分发循环后调用。
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