如何从zf2中的Module.php发送数据进行查看

Question

I searched for the same and got some answer about it, but did not help.

Those way I tried are as follows:

1)

in onBootstrap($e) function:

$e->getViewModel()->setVariable('test_variable', 'Hello World!');
        //or
$e->getViewModel()->test_variable = 'Hello World!';

2) I created a function in Module.php

function boforeDispatch(MvcEvent $event) {
    $event->getViewModel()->setVariable('test_variable', 'Hello World!');
    //or
    $event->getViewModel()->test_variable = 'Hello World!';
}

and called this function inside the onBootstrap($e) function

$application = $e->getApplication();
$eventManager = $application->getEventManager();
$eventManager->attach(MvcEvent::EVENT_DISPATCH, array($this, 'boforeDispatch'), 100);

when I tried in view

echo $test_variable;

it gives undefined variable test_variable in ... error all the times.

Any idea?

Answer 1

Try using render event (MvcEvent::EVENT_RENDER) instead:

public function onBootstrap($event){
    $application = $event->getApplication();
    $eventManager = $application->getEventManager();
    $events->attach(MvcEvent::EVENT_RENDER, array($this, 'addVariablesToViewModel'), 100);
}

public function addVariablesToViewModel($event)
{
    $viewModel = $this->getEvent()->getViewModel();
    $viewModel->setVariables(array(
        'key' => 'value',
    ));
}

Your view model is probably not yet available on (pre) dispatch