How to translate form labels in Zend Framework 2?

Question

I'm not getting it!.. Can please someone explain, how to translate form labels? A simple example would be great.

Thank you in advance!

---

class Search\Form\CourseSearchForm

...

class CourseSearchForm extends Form {

    ...

    public function __construct(array $cities) {
        parent::__construct('courseSearch');
        ...
        $this->add(array(
            'name' => 'city',
            'type'  => 'Zend\Form\Element\Select',
            'options' => array(
                'label' => 'Stadt',
                'value_options' => $this->cities,
                'id'  => 'searchFormCity',
            ),
        ));
        ...
    }
}

view script /module/Search/view/search/search/search-form.phtml

<?php echo $this->form()->openTag($form); ?>
<dl>
    ...
    <dt><label><?php echo $form->get('city')->getLabel(); ?></label></dt>
    <dd><?php echo $this->formRow($form->get('city'), null, false, false); ?></dd>
    ...
</dl>
<?php echo $this->form()->closeTag(); ?>
<!-- The formRow(...) is my MyNamespace\Form\View\Helper (extends Zend\Form\View\Helper\FormRow); the fourth argument of it disables the label. -->

---

The module/Application/config/module.config.php is configured:

return array(
    'router' => ...
    'service_manager' => array(
        'factories' => array(
            'translator' => 'Zend\I18n\Translator\TranslatorServiceFactory',
        ),
    ),
    'translator' => array(
        'locale' => 'de_DE',
        'translation_file_patterns' => array(
            array(
                'type'     => 'gettext',
                'base_dir' => __DIR__ . '/../language',
                'pattern'  => '%s.mo',
            ),
        ),
    ),
    'controllers' => ...
    'view_manager' => ...
);

I also edited my view and use the FormLabel view helper:

<dt><label><?php echo $this->formLabel($form->get('city')); ?></label></dt>

Furthermore I debugged the FormLabel at the place, where the tranlator is used (lines 116-120) -- seems to be OK.

But it's still not working.

---

EDIT

The (test) items for labels, I added to the de_DE.po file manually, are tranlated. The ZF2 side problem was actually, that I was using $form->get('city')->getLabel() instead of $this->formlabel($form->get('city')) in th view script.

The problem is now, that the labels are not added to the de_DE.po file. But it's not a ZF2 issue anymore, so I've accept Ruben's answer and open a new Poedit question.

Answer 1

Instead of using:

<?php echo $form->get('city')->getLabel(); ?>

You should use the formlabel view helper. This helper automatically uses your translator during rendering if you have inserted it in your ServiceManager. Most likely you will have it in your Application's module module.config.php:

'service_manager' => array(
        'factories' => array(
            'translator' => 'Zend\I18n\Translator\TranslatorServiceFactory',
        ),
    ),

    'translator' => array(
        'locale' => 'en_US',
        'translation_file_patterns' => array(
            array(
                'type'     => 'gettext',
                'base_dir' => __DIR__ . '/../language',
                'pattern'  => '%s.mo',
            ),
        ),
    ),

Once you do use the formlabel view helper:

echo $this->formLabel($form->get('city'));

And of course make sure your translations are in your .po file.