<?php
     define ("APPLICATION_PATH", dirname(__FILE__));

     $app = new Yaf_Application("conf/application_simple.ini");

     //bootstrap
     $app->getDispatcher()->setAppDirectory(APPLICATION_PATH .
     "/action/")->getApplication()->bootstrap()->run();

     //当然也可以使用
     $dispatcher = Yaf_Dispatcher::getInstance()->setAppDirectory(APPLICATION_PATH .
          "/action/")->getApplication()->bootstrap()->run();
     ?>