(PECL yaf >=1.0.0)
Yaf_Application::app — Retrive an Application instance
Retrive the Yaf_Application instance, alternatively, we also could use Yaf_Dispatcher::getApplication().
This function is currently not documented; only its argument list is available.
This function has no parameters.
an Yaf_Application instance, if no Yaf_Application initialized before, NULL will be returned.