Translator usage

PHP files

Translator service

The translator service can be obtained from container using translator or better be injected. Service is pre-configured to automatically detect current locale, domain is by default set to 'messages'.

AbstractController

Zikula Translator is automatically added in AbstractController and you can access it in your module controller using:

$this->translator

Translation example

$translated = $this->translator->trans('Hello World');

When using \Zikula\Bundle\CoreBundle\Translation\TranslatorTrait also a shortcut method becomes available:

$translated = $this->trans('Page');

Convert translations in PHP from earlier versions

Some examples for how to convert translations in PHP files:

// import
use Zikula\Common\Translator\TranslatorInterface;       // old
use Symfony\Contracts\Translation\TranslatorInterface;  // new

// 1. Simple:
$this->__('Hello')      // old
$this->trans('Hello')   // new

// 2. With simple substitution parameters
$this->__f('Hello %userName%', ['%userName%' => 'Mark Smith'])      // old
$this->trans('Hello %userName%', ['%userName%' => 'Mark Smith'])    // new

// 3. With explicit domain
$this->__('Hello', 'acmefoomodule')             // old
$this->trans('Hello', [], 'acmefoomodule')      // new

You can still use Zikula\Bundle\CoreBundle\Translation\TranslatorTrait, but it has only one method left now:

public function trans(string $id, array $parameters = [], string $domain = null, string $locale = null): string

You can/should remove the setTranslator method from your class which uses the trait. It is not needed anymore.

Automatic translations

You should remove all translation calls from the following elements:

  • Strings inside form type classes:
    • Form field labels
    • Choice labels
    • Placeholders
    • String values for empty_value attribute
    • Invalid messages
    • Single help messages
    • Input group addons
    • Alert messages
    • Title attributes
  • Flash messages ($this->addFlash() as well as getFlashBag()->add()); except when substitution parameters are used.
  • Knp menu entries:
    • Labels ($menu->addChild('foo') as well as $menu['foo']->setLabel('bar'))
    • Link titles (setLinkAttribute('title', 'my.title'))

They will be picked up by the extractor nevertheless.

More information about how translation of form messages work can be found here.

For a help array with multiple strings you need to use annotations guiding the extractor (see next section).

Using the extractor

To extract translations and influence the extractor's behaviour please read this doc.

Twig template files

For translations in Twig Zikula uses native Symfony Twig trans functionality (docs).

{% trans %}Error! That cannot be done.{% endtrans %}

Convert translations in Twig from earlier versions

Some examples for how to convert translations in templates:

1. Simple:
Old: {{ __('Hello') }}
New: {% trans %}Hello{% endtrans %} or {{ 'Hello'|trans }}

2. With simple substitution parameters
Old: {{ __f('Hello %userName%', {'%userName%': 'Mark Smith'}) }}
New: {% trans with {'%userName%': 'Mark Smith'} %}Hello %userName%{% endtrans %}

3. With explicit domain and locale
Old: {{ __('Hello', 'acmefoomodule', 'fr') }}
New: {% trans with {} from 'acmefoomodule' into 'fr' %}Hello{% endtrans %} or {{ 'Hello'|trans({}, 'acmefoomodule', 'fr' }}

See Symfony docs for further details and examples of simple translation.

There is also a desc filter for specifying a default translation for a key. You can find an example for this in this doc.