Zend redirect to controller if action not exist

For example I have action example.com/books/list

But I made mistake and write example.com/books/lists, action lists not exist, how to redirect to controller/index if action not exist.

To check before go to action I can use preDispatch(), but how to check do this action exist ?

Answer

Here is a function to check weither an action exists or not. It takes as parameter Zend_Controller_Request_Abstract and returns a boolean :

private function _actionExists($request) { 
            $dispatcher = Zend_Controller_Front::getInstance()->getDispatcher(); 
            
            // Check controller 
            if (!$dispatcher->isDispatchable($request)) { 
                    return false; 
            } 
            
            // Check action 
            $controllerClassName = $dispatcher->formatControllerName( $request->getControllerName() ); 
            $controllerClassFile = $controllerClassName . '.php'; 
            if ($request->getModuleName() != $dispatcher->getDefaultModule()) { 
                    $controllerClassName = ucfirst($request->getModuleName()) . '_' . $controllerClassName; 
            } 
            try { 
                    require_once 'Zend/Loader.php'; 
                    Zend_Loader::loadFile($controllerClassFile, $dispatcher->getControllerDirectory($request->getModuleName())); 
                    $actionMethodName = $dispatcher->formatActionName($request->getActionName()); 
                    if (in_array($actionMethodName, get_class_methods($controllerClassName))) { 
                            return true; 
                    } 
                    return false; 
            } catch(Exception $e) { 
                    return false; 
            } 
    }

Pleaser see this link for more details.

And then if the action effectively does not exists (the function returns false), redirect to your index route :

$this->_helper->redirector($action, $controller, $module);

EDIT :

AS @MuhannadA.Alhariri and @php-dev state respectively in their answer and comment, this can be also handled by customizing the ErrorController within we have just to compare the error_handler with Zend_Controller_Plugin_ErrorHandler::EXCEPTION_NO_ACTION. Here is a post which gives a customized error controller.