Zend Framework 2 - Layout and variable

Question

i have a layout used by all my views and i need to assign a variable from a controller to this layout , if i use this method on a controller it doesn\'t work :

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Answer 1

If you want to pass values to your layout globally then you can refer this : https://stackoverflow.com/a/21455737/2190889

Answer 2

Because ZF2 ViewModel is tree structure, the layout actually is the root node of ViewModel, the ViewModel in your controller will be add as a child node of layout.

You could access layout ViewModel by access MvcEvent, try this in your controller:

public function indexAction()
{
    $events = $this->getServiceLocator()->get('Application')->getEventManager();
    $events->attach(MvcEvent::EVENT_RENDER, array($this, 'setVariableToLayout'), 100);
}

public function setVariableToLayout($event)
{
    $viewModel = $this->getEvent()->getViewModel();
    $viewModel->setVariables(array(
        'testvar' => 'bla',
    ));
}

Answer 3

Rob Allen has posted a great article about how to access view variables in another view model (e.g.: layout)

Basically the following code, placed inside your layout.phtml, will match your needs:

<?php
$children = $this->viewModel()->getCurrent()->getChildren();
$child = $children[0];
?>
<!-- some HTML -->
<?php echo $this->escape($child->myvar);?>

Answer 4

There are three ways to achieve this in ZF2 (in your controller):

First:

$this->layout()->someVariableName = 'Some value for the variable';

Second:

$this->layout()->setVariable('someVariableName', 'Some value for the variable');

Third:

$this->layout()->setVariables(array(
    'someVariableName' => 'Some value for the variable',
    'anotherVariable'  => 'Some value for another variable',
);

Answer 5

See the add View Variable section below

add it in your module.php file.

You can also do this using view helper.

/**
     * Remember to keep the init() method as lightweight as possible
     * 
     * @param \Zend\ModuleManager\ModuleManager $moduleManager
     */
    public function init(ModuleManager $moduleManager) 
    {        
        $events = $moduleManager->getEventManager();
        $events->attach('loadModules.post', array($this, 'modulesLoaded'));
        $events->attach('onBootstrap', array($this, 'bootstrap'));

        $sharedEvents = $events->getSharedManager();
        $sharedEvents->attach(__NAMESPACE__, 'bootstrap', array($this, 'bootstrap'), 100);
        $sharedEvents->attach(__NAMESPACE__, 'bootstrap', array($this, 'initializeView'), 100);
        $sharedEvents->attach(__NAMESPACE__, 'dispatch', array($this, 'addViewVariables'), 201);        
    }


/**
 * 
 * @param \Zend\Mvc\MvcEvent $e
 */
public function loadConfiguration(MvcEvent $e) 
{        
    $e->getApplication()->getServiceManager()
            ->get('ControllerPluginManager')->get('AclPlugin')
            ->checkAcl($e); //Auth/src/Auth/Controller/AclPlugin      
}

/**
 * 
 * @param \Zend\EventManager\EventInterface $e
 */
public function bootstrap(Event $e) {

    $eventManager = $e->getParam('application')->getEventManager();
    //$app->getEventManager()->attach('dispatch', array($this, 'checkAcl'), 100);
}

/**
 * pass variables to layout
 * 
 * @param \Zend\EventManager\EventInterface $e
 */
public function addViewVariables(Event $e) 
{
    $route = $e->getRouteMatch();
    $viewModel = $e->getViewModel();
    $variables = $viewModel->getVariables();
    if (false === isset($variables['controller'])) {
        $viewModel->setVariable('controller', $route->getParam('controller'));
    }
    if (false === isset($variables['action'])) {
        $viewModel->setVariable('action', $route->getParam('action'));
    }

    $viewModel->setVariable('module', strtolower(__NAMESPACE__));        
}

/**
 * 
 * @param \Zend\Mvc\MvcEvent $e
 */
public function initializeView(Event $e) 
{

}

and in your layout you can simply access those variables using their name such as $module, $action, $controller according to above example

Answer 6

Have you tried:

$this->layout()->testvar = 'bla';

Using the layout controller plugin you can retrieve the ViewModel object that is used in layout.phtml.