这是我的MVC框架ActionController的封装

<?php

/*
 * MST_Library v3.1
 * @autohr Janpoem
 */

if (!defined('IN_MST_CORE'))
	exit('MST_ActionController Can\'t be include single!');

if (!defined(MST_Core::LITE_MODE)) {
	MST_Core::import(array(
		'MST/ActionController/Request',
		'MST/ActionController/Router',
	), MST_Core::P_LIB);
}

abstract class MST_ActionController {

	const
		NO_RENDER			= false,
		IS_RENDER			= 'CONTROLLER_IS_RENDER',
		PF_CONTROLLER		= 'Controller',
		PF_ACTION			= 'Action',
		FILE				= 'file',
		VIEW				= 'view',
		TEXT				= 'text',
		ACTION				= 'action',
		WIDGET				= 'widget',
		CUSTOM_VIEW			= 'custom_view';

	private static
		$_request = null,
		$_instance = null,
		$_currentView = null;
	
	# @todo 此处的处理应该放到controller被实例化以后, dispatch应该有一个具体含义
	final static public function dispatch(array $config = null, $beforeDispatch = null) {
		if (self::$_instance == null) {
			$request = new MST_ActionController_Request($config['request']);
			$router = new MST_ActionController_Router($config['routes']);
			$router->routing($request);
			$controller = $request['controller'];
			$controller = MST_String::camelize2($controller) . static::PF_CONTROLLER;
			if ($request['module'] != null) {
				$module = $request['module'];
				if (strpos($module, '/') !== false)
					$module = str_replace('/', '_', $module);
				$controller = $module . '_' . $controller;
			}
			if (is_callable($beforeDispatch)) {
				call_user_func_array($beforeDispatch, array($request, & $controller));
			}
			$GLOBALS['DATA_CACHE']['request'] = & $request;
			if (!class_exists($controller))
				MST_Core::error(202, $controller);
			else
				self::$_instance = new $controller();
		}
	}

	public
		$layout = false,
		$format = 'html',
		$params = null,
		$autoLoadHelper = false;

	protected
		$comet = 0,
		$viewPath = null,
		$defaultRender = self::VIEW;

	abstract public function application();

	private function __construct()
	{
		if ($this->comet <= 0)
			ob_start();
		$this->params = & $GLOBALS['DATA_CACHE']['request'];
		$this->viewPath = trim(
			$this->params['module'] . '/' . $this->params['controller'], '/');
		if ($this->application() !== self::NO_RENDER)
			$this->action($this->params['action']);
	}

	public function __destruct() {
		if (!defined(self::IS_RENDER) && self::$_currentView != null) {
			switch ($this->defaultRender) {
				case self::VIEW :
				case self::TEXT :
				case self::ACTION :
				case self::WIDGET :
					#$this->defaultRender = $mode;
					break;
				default :
					$this->defaultRender = self::VIEW;
			}
			$this->render(
				$this->defaultRender,
				self::$_currentView
			);
		}
		if (self::$_instance != null)
			self::$_instance = null;
		if (self::$_request != null)
			self::$_request = null;
	}

	protected function action($action) {
		$name = MST_String::camelize($action);
		$actName = $name . self::PF_ACTION;
		if (!method_exists($this, $actName))
			MST_Core::error(203, $actName);
		$actRef = new ReflectionMethod($this, $actName);
		if ($actRef->isPrivate() || $actRef->isProtected()
		 && !constant(MST_ActionController_Router::IS_MAP))
			MST_Core::error(203, $actName);
		if ($this->$actName() !== self::NO_RENDER && self::$_currentView == null)
			self::$_currentView = $action;
		return $this;
	}

	/**
	 * 输出，url跳转
	 */
	protected function redirect($url) {
		if (defined(self::IS_RENDER)) return self::NO_RENDER;
		define(self::IS_RENDER, true);
		header('Location:'.linkUri($url));
		return $this;
	}

	// render XML
	// render JAVASCRIPT
	protected function render(
		$mode = null,
		$content = null,
		array $options = null)
	{
		if (defined(self::IS_RENDER)) return self::NO_RENDER;
		define(self::IS_RENDER, true);
		if ($mode == null) $mode = $this->defaultRender;
		if ($mode == self::VIEW)
			$content = $this->viewPath . '/' . $content;
		MST_ActionView::instance()
			->assign($this)
			->setOptions($options)
			->render($mode, $content);
		return $this;
	}

	protected function customRender($file, $path, array $options = null) {
		return $this->render(self::CUSTOM_VIEW, array($file, $path), $options);
	}

	protected function setView($val) {
		self::$_currentView = $val;
	}

	protected function setViewOption($key, $val) {
		MST_ActionView::instance()->setOption($key, $val);
		return $this;
	}

	protected function getViewOption($key) {
		return MST_ActionView::instance()->getOption($key);
	}

	protected function setViewOptions(array $options) {
		MST_ActionView::instance()->setOptions($options);
		return $this;
	}

	protected function getViewOptions() {
		return MST_ActionView::instance()->getOptions();
	}

	protected function doComet(Closure $fn) {
		$times = 0;
		set_time_limit(0);
		while(true) {
			ob_flush();
			flush();
			$times++;
			$result = call_user_func($fn, $times, $this);
			if ($result === false) {
				break;
			}
			usleep(10000);
			sleep($this->comet);
		}
	}
}