How to register View helper - view-helpers

Question

How to register View helper using factories?
View\Helper\GenerateAnchor::class => GenerateAnchorFactory::class,

Answer 1

I guess you just need settings in configuration file, but I'll show full road to registering view helpers in Zend 3
First, we need view helper:
namespace MyNamespace\View\Helper;
use Zend\View\Helper\AbstractHelper;
class TestViewHelper extends AbstractHelper
{
public function __invoke()
{
// your code...
}
}
If we need inject some dependencies, then we need to create custom factory, however if our view helper doesn't need other services/class then we can skip this step
namespace MyNamespace\Factory\View\Helper;
use Interop\Container\ContainerInterface;
use Zend\ServiceManager\FactoryInterface;
use Zend\ServiceManager\ServiceLocatorInterface;
use MyNamespace\View\Helper\TestViewHelper;
class TestViewHelperFactory implements FactoryInterface
{
/**
*
* #param ContainerInterface $container
* #param string $requestedName
* #param null|array $options
* #return TestViewHelper
*/
public function __invoke(ContainerInterface $container, $requestedName, array $options = null)
{
$class = $requestedName ? $requestedName : TestViewHelper::class;
$auth = $container->get('MyCustomAuth');
$viewHelper = new $class($auth);
return $viewHelper;
}
/**
* Provided for backwards compatibility; proxies to __invoke().
*
* #param ContainerInterface|ServiceLocatorInterface $container
* #return TestViewHelper
*/
public function createService(ServiceLocatorInterface $container)
{
return $this($container, TestViewHelper::class);
}
}
Last step is to register our view helper in module.config.php
'view_helpers' => [
'aliases' => [
'viewPlugin' => View\Helper\TestViewHelper::class,
],
'factories' => [
View\Helper\TestViewHelper::class => InvokableFactory::class // Or use your own factory
]
],
And... in our view template we can use it like this:
index.phtml
<?php echo $this->viewPlugin(); ?>