php i18n with twig and symfony translation component outside of symfony framework

Posted on Jun 5, 2016

#i18n #php #twig #symfony

composer.json

{
  "require" : {
    "twig/twig": "~1.0",
    "symfony/translation": "^3.1",
    "symfony/twig-bridge": "^3.1",
    "symfony/config": "^3.1",
    "symfony/yaml": "^3.1"
  },
}

php

$loader = new Twig_Loader_Filesystem(__DIR__.'/../templates');
$twig = new Twig_Environment($loader);

$locale = 'en';
if(isset($_SERVER['HTTP_ACCEPT_LANGUAGE']) && strlen($_SERVER['HTTP_ACCEPT_LANGUAGE'])>0) {
  $locale = substr($_SERVER['HTTP_ACCEPT_LANGUAGE'], 0, 2);
}
$translator = new Symfony\Component\Translation\Translator($locale, new \Symfony\Component\Translation\MessageSelector());
$translator->setFallbackLocales(['en']);
$translator->addLoader('yaml', new Symfony\Component\Translation\Loader\YamlFileLoader());
$translator->addResource('yaml',  __DIR__.'/../locales/en.yml', 'en');
$translator->addResource('yaml',  __DIR__.'/../locales/ja.yml', 'ja');

$twig->addExtension(new \Symfony\Bridge\Twig\Extension\TranslationExtension($translator));
$data = ['somethig' => 'abcd'];
$twig->render("hello.html", $data);

yml

foo: FOO

html

<!DOCTYPE html>
<html>
<body>
<p>{{ 'foo'|trans }}</p>
</body>
</html>

output

FOO

References:
https://gist.github.com/2bard/4329452
http://silex.sensiolabs.org/doc/providers/twig.html
http://silex.sensiolabs.org/doc/providers/translation.html