Using Symfony translation component in Twig outside of Symfony2 framework.

translation_notes

Note: I've left some of the full package names in tact to show exactly where the class comes from. 

#### Pull dependencies in using composer ####

//Example composer.json
{
    "require": {
        "symfony/config" : "2.1.0",
        "symfony/yaml" : "2.1.0",
        "twig/twig": "1.9.0",
        "twig/extensions": "*",
        "symfony/twig-bridge": "2.1.*",
        "symfony/form": "*",
        "symfony/templating": "*",
        "symfony/translation": "2.1.*"
    },
}


Then run "php composer.phar install" in your shell (or "php composer.phar update" if you're updating)

#### Setup twig ####

//make twig loader
$loader = new \Twig_Loader_Filesystem('/path/to/templates/');

//pass loader to new twig environment
$twig = new \Twig_Environment($loader);


#### Setup translation ####

//make translator, pass locale and instance of MessageSelector
$translator = new Translator('en_GB', new \Symfony\Component\Translation\MessageSelector());

//set default locale (good for testing!)
$translator->setFallbackLocale('fr_FR');

//build the yaml loader
$yamlLoader = new \Symfony\Component\Translation\Loader\YamlFileLoader();

//add the loader to the translator
$translator->addLoader('yaml', $yamlLoader);

//add some resources to the translator. mmmm... resources
$translator->addResource('yaml', '/myapp/strings/fr_FR.yml', 'fr_FR');


//we can also add resources from an array
$translator->addLoader('array', new \Symfony\Component\Translation\Loader\ArrayLoader());
$translator->addResource('array', array( 'Hello World!' => 'Bonjour tout le monde!',),'fr_FR');

#### Bridge between twig and translator ####

$twig->addExtension(new \Symfony\Bridge\Twig\Extension\TranslationExtension($translator));


#### Example translation file.. it's just a YAML array ####

Welcome: Bienvenue
Welcome to your dashboard, %name%: Bienvenue sur votre tableau de bord, %name%


#### Usage in twig template ####

- Using 'trans' filter:
<h3> {{"Welcome to your dashboard, %name%" | trans({'%name%' : user.getName})}}</h3>
(Note: user is an object which we have exposed to twig)

- Using 'trans' tags:
<h3>{% trans %}Hello World!{% endtrans %}</h3>


#### Calling the translation object directly ####

You can call the translator object directly if you have access to it (stick it in a dependency injection container if you want unicorns)

echo $translator->trans('Hello World!');



...and that's magic!

Thanks

Not sure if "symfony/templating" is needed at all?

https://gist.github.com/2bard/4329452#file-translation_notes-L55 totally saved my day, this was exactly the connecting dot i was missing, the bridge isn't mentioned in either twig or symfony docs

Thanks a lot!