Using Translation in Templates

Twig Templates

Using Twig Tags

Symfony provides a specialized Twig tag trans to help with message translation of static blocks of text:

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{% trans %}Hello %name%{% endtrans %}

ご用心

The %var% notation of placeholders is required when translating in Twig templates using the tag.

ちなみに

If you need to use the percent character (%) in a string, escape it by doubling it: {% trans %}Percent: %percent%%%{% endtrans %}

You can also specify the message domain and pass some additional variables:

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{% trans with {'%name%': 'Fabien'} from 'app' %}Hello %name%{% endtrans %}

{% trans with {'%name%': 'Fabien'} from 'app' into 'fr' %}Hello %name%{% endtrans %}

Using Twig Filters

The trans filter can be used to translate variable texts and complex expressions:

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{{ message|trans }}

{{ message|trans({'%name%': 'Fabien'}, 'app') }}

ちなみに

Using the translation tags or filters have the same effect, but with one subtle difference: automatic output escaping is only applied to translations using a filter. In other words, if you need to be sure that your translated message is not output escaped, you must apply the raw filter after the translation filter:

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{# text translated between tags is never escaped #}
{% trans %}
    <h3>foo</h3>
{% endtrans %}

{% set message = '<h3>foo</h3>' %}

{# strings and variables translated via a filter are escaped by default #}
{{ message|trans|raw }}
{{ '<h3>bar</h3>'|trans|raw }}

ちなみに

You can set the translation domain for an entire Twig template with a single tag:

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{% trans_default_domain 'app' %}

Note that this only influences the current template, not any “included” template (in order to avoid side effects).

PHP Templates

The translator service is accessible in PHP templates through the translator helper:

<?= $view['translator']->trans('Symfony is great') ?>