zf2 Creation of simple service and access it through viewhelper - php

Question

I am trying to create a simple service in zf2 which I can access using in viewhelper
Step1. I have craeted a class in src/Application/Service/Service1.php as follow
namespace Application\Service;
use Zend\ServiceManager\ServiceLocatorAwareInterface;
use Zend\ServiceManager\ServiceLocatorInterface;
class Service1 implements ServiceLocatorAwareInterface
{
public function __construct()
{
}
public function setServiceLocator(ServiceLocatorInterface $serviceLocator)
{
}
public function getServiceLocator()
{
}
}
Step2 I set this up in module.php file as below.
public function getServiceConfig()
{
return array(
'factories' => array(
'Application\Service\Service1' => function ($sm) {
return new \Application\Service\Service1($sm);
},
)
);
}
public function onBootstrap($e)
{
$serviceManager = $e->getApplication()->getServiceManager();
$serviceManager->get('viewhelpermanager')->setFactory('Abc', function ($sm) use ($e) {
return new \Application\View\Helper\Abc($sm);
});
}
Step3 finally I am geting it in my view helper src/Application/View/Helper/Abc.php test() method like this, I I comment this line $this->sm->get('Application\Service\Service1'); there is no error, there must be something which I am missing in service?
namespace Application\View\Helper;
use Zend\View\Helper\AbstractHelper;
class Abc extends AbstractHelper
{
protected $sm;
public function test()
{
$this->sm->get('Application\Service\Service1');
}
public function __construct($sm) {
$this->sm = $sm;
}
}
Step4 then I am calling my test view helper in one of view like this.
$this->Abc()->test();
I am getting following error.
Fatal error: Call to undefined method Application\Service\Service1::setView() in vendor/zendframework/zendframework/library/Zend/View/HelperPluginManager.php on line 127 Call Stack:
what am I missing?

Answer 1

An alternative, in PHP 5.4 only, without specific configuration, would be to use traits:
extract of module.config.php:
'view_helpers' => array(
'invokables' => array(
'myHelper' => 'Application\View\Helper\MyHelper',
),
MyHelper.php:
<?php
namespace Application\View\Helper;
use Zend\ServiceManager\ServiceLocatorAwareInterface;
class HeadScript extends \Zend\View\Helper\MyHelper implements ServiceLocatorAwareInterface
{
use \Zend\ServiceManager\ServiceLocatorAwareTrait;
public function __invoke()
{
$config = $this->getServiceLocator()->getServiceLocator()->get('Config');
// do something with retrived config
}
}

Answer 2

change the line $this->sm->getServiceLocator()->get('Application\Service\Service1'); in below method
class Abc extends AbstractHelper
{
protected $sm;
public function test()
{
$this->sm->getServiceLocator()->get('Application\Service\Service1');
}
public function __construct($sm) {
$this->sm = $sm;
}
}