ZF3 zend-mvc-skeleton internationalization not working

Question

I'm trying to evaluate if it's already the right time to start moving to ZF3 (or keep developing my application with ZF2). Therefore, I installed the mvc-skeleton application and walked through the MVC tutorial (here) which worked perfectly until I got to the internationalization part.

I installed the components (i.e. zend-i18n and zend-mvc-i18n component), created the translation files (i.e. en_US.mo and en_US.po) and copied them into my module/Application/language/ folder and added the configuration in the application configuration file.

// in a module's module.config.php:
'translator' => [
    'locale' => 'en_US',
    'translation_file_patterns' => [
        [
            'type'     => 'gettext',
            'base_dir' => __DIR__ . '/../language',
            'pattern'  => '%s.mo',
        ],
    ],
],

And of course, added the text to translate in the layout.phtml file

<p>&copy; 2016 by Examples Ltd. <?= $this->translate('All rights reserved') ?></p>

However, for some reason it's not working

Zend\ServiceManager\Exception\ServiceNotFoundException    

File:
my_install_path/zend-mvc-skeleton-application/vendor/zendframework/zend-servicemanager/src/AbstractPluginManager.php:133

Message:
A plugin by the name "translate" was not found in the plugin manager Zend\View\HelperPluginManager

Stack trace:
#0 /my-own-install-path/vendor/zendframework/zend-view/src/Renderer/PhpRenderer.php(373): Zend\ServiceManager\AbstractPluginManager->get('translate', NULL)
#1 /my-own-install-path/vendor/zendframework/zend-view/src/Renderer/PhpRenderer.php(391): Zend\View\Renderer\PhpRenderer->plugin('translate')
#2 /my-own-install-path/module/Application/view/application/index/index.phtml(1): Zend\View\Renderer\PhpRenderer->__call('translate', Array)
#3 /my-own-install-path/module/Application/view/application/index/index.phtml(1): Zend\View\Renderer\PhpRenderer->translate('Dr Job')
#4 /my-own-install-path/vendor/zendframework/zend-view/src/Renderer/PhpRenderer.php(502): include('/Applications/M...')
#5 /my-own-install-path/vendor/zendframework/zend-view/src/View.php(207): Zend\View\Renderer\PhpRenderer->render(Object(Zend\View\Model\ViewModel))
#6 /my-own-install-path/vendor/zendframework/zend-view/src/View.php(236): Zend\View\View->render(Object(Zend\View\Model\ViewModel))
#7 /my-own-install-path/vendor/zendframework/zend-view/src/View.php(200): Zend\View\View->renderChildren(Object(Zend\View\Model\ViewModel))
#8 /my-own-install-path/vendor/zendframework/zend-mvc/src/View/Http/DefaultRenderingStrategy.php(105): Zend\View\View->render(Object(Zend\View\Model\ViewModel))
#9 /my-own-install-path/vendor/zendframework/zend-eventmanager/src/EventManager.php(271): Zend\Mvc\View\Http\DefaultRenderingStrategy->render(Object(Zend\Mvc\MvcEvent))
#10 /my-own-install-path/vendor/zendframework/zend-eventmanager/src/EventManager.php(143): Zend\EventManager\EventManager->triggerListeners(Object(Zend\Mvc\MvcEvent))
#11 /my-own-install-path/vendor/zendframework/zend-mvc/src/Application.php(369): Zend\EventManager\EventManager->triggerEvent(Object(Zend\Mvc\MvcEvent))
#12 /my-own-install-path/vendor/zendframework/zend-mvc/src/Application.php(348): Zend\Mvc\Application->completeRequest(Object(Zend\Mvc\MvcEvent))
#13 /my-own-install-path/public/index.php(43): Zend\Mvc\Application->run()
#14 {main}

My question is simple. Did you succeed in this or do you have any idea of what's wrong with it? Any help will be appreciated. Many thanks.

Countless

Do you know how to config translator/I18n on controller or via controller plugin? – Bingaman

Answer 1

It looks like it can't find the translate view helper. Try adding this in your config file:

'view_helpers' => [
    'invokables' => [
        'translate' => \Zend\I18n\View\Helper\Translate::class
    ]
]

I also found I needed to register the service:

'service_manager' => [
    'factories' => [
        \Zend\I18n\Translator\TranslatorInterface::class => \Zend\I18n\Translator\TranslatorServiceFactory::class,
    ]
]

Superpower

Great, the view_helpers array did the job. – Countless

How to do the same to work translator on controller? – Bingaman

First inject the translate view helper into the controller using a factory (code: $serviceManager->get('ViewHelperManager')->get('translate')). Then in the controller use the translator's __invoke method i.e. $translatedString = $translateHelper("Here is a string"). – Superpower

Answer 2

I got the "plain vanilla" solution from samsonasik here. The solution is to require:

$ composer require zendframework/zend-mvc-i18n

then register as module:

'modules' => [
     'Zend\I18n',
     'Zend\Mvc\I18n',
     // ...
],

Countless

This is the correct answer. Additionally, if you are using zend-component-installer, it should ask you if you want to install these modules, and then do it for you. If you are not using zend-component-installer yet, add it to your application via composer require zendframework/zend-component-installer, as it automates this. – Oedipus

this is the correct answer, an installer does not include 'Zend\I18n' to the array of modules, only 'Zend\Mvc\I18n', so its config is not included to the application initially – Margalit

Answer 3

It work me with this configuration:

'translator' => [
    'locale' => 'cs_CZ',
    'translation_file_patterns' => [
        [
            'type' => 'gettext',
            'base_dir' => APPLICATION_MODULE_ROOT . '/language',
            'pattern' => '%s.mo',
        ],
    ],
],

With which modules you have installed zf3? zend-servicemanager do you have installed?

Indissoluble

The modules installed are: 'Zend\Mvc\I18n', 'Zend\Log', 'Zend\Form', 'Zend\Db', 'Zend\Router', 'Zend\Validator', 'Application' – Countless