How to run same lines in all controllers init() function?

Question

I need same 2 lines in all my controllers, each controller have its own init logic, but these two lines are common for all of them.

public function init()
{
    $fm =$this->_helper->getHelper('FlashMessenger');
    $this->view->messages = $fm->getMessages();
}

How can I avoid repeat code ?

Update:

Ok, the FlashMessenger was only an example, let's say I need write a log line in every action except for 'someAction' @ 'someController'. So the new common lines should be.

$this->logger = new Zend_Log();
$writer = new Zend_Log_Writer_Stream(APPLICATION_PATH.'/../logs/log.txt');
$this->logger->addWriter($writer);
$this->logger->log('Some Message',Zend_Log::DEBUG);

The question is, where should I place these lines in order to avoid repeat them in all init() of each controller. These lines should be placed at bootstrap?. If so: How can skip log lines for 'someAction'. Or should I implement a 'BaseController' and make all my controller extend from it. If so: How can I Autoload it? (Fatal error: Class 'BaseController' not found) .

Answer 1

Just subclass the controller:

class Application_ControllerAction extends Zend_Controller_Action {
    public function init()
    {
        $fm =$this->_helper->getHelper('FlashMessenger');
        $this->view->messages = $fm->getMessages();
    }
}


class IndexController extends Application_ControllerAction {
}

You may also achieve the same writing Controller Plugin.

Edit:

Front controller plugins are executed on each request, just like the Controllers and have the same hook methods:

routeStartup(): prior to routing the request
routeShutdown(): after routing the request
dispatchLoopStartup(): prior to entering the dispatch loop
preDispatch(): prior to dispatching an individual action
postDispatch(): after dispatching an individual action
dispatchLoopShutdown(): after completing the dispatch loop

I addition, you may check controller params to execute the code only on selected requests:

if ('admin' == $this->getRequest()->getModuleName() 
&& 'update' == $this->getRequest()->getActionName() ) …