TwigServiceProvider

The TwigServiceProvider provides integration with the Twig template engine.

Parameters

• twig.path (optional): Path to the directory containing twig template files (it can also be an array of paths).
• twig.templates (optional): An associative array of template names to template contents. Use this if you want to define your templates inline.
• twig.options (optional): An associative array of twig options. Check out the twig documentation for more information.
• twig.form.templates (optional): An array of templates used to render forms (only available when the FormServiceProvider is enabled).

Services

• twig: The Twig_Environment instance. The main way of interacting with Twig.
• twig.loader: The loader for Twig templates which uses the twig.path and the twig.templates options. You can also replace the loader completely.

Registering

$app->register(new Silex\Provider\TwigServiceProvider(), array(
    'twig.path' => __DIR__.'/views',
));

Note

Twig comes with the “fat” Silex archive but not with the regular one. If you are using Composer, add it as a dependency to your composer.json file:

"require": {
    "twig/twig": ">=1.8,<2.0-dev"
}

Symfony2 Components Integration

Symfony provides a Twig bridge that provides additional integration between some Symfony2 components and Twig. Add it as a dependency to your composer.json file:

"require": {
    "symfony/twig-bridge": "2.1.*",
}

When present, the TwigServiceProvider will provide you with the following additional capabilities:

• UrlGeneratorServiceProvider: If you are using the UrlGeneratorServiceProvider, you will have access to the path() and url() functions. You can find more information in the Symfony2 Routing documentation.
• TranslationServiceProvider: If you are using the TranslationServiceProvider, you will get the trans() and transchoice() functions for translation in Twig templates. You can find more information in the Symfony2 Translation documentation.
• FormServiceProvider: If you are using the FormServiceProvider, you will get a set of helpers for working with forms in templates. You can find more information in the Symfony2 Forms reference.
• SecurityServiceProvider: If you are using the SecurityServiceProvider, you will have access to the is_granted() function in templates. You can find more information in the Symfony2 Security documentation.

Usage

The Twig provider provides a twig service:

$app->get('/hello/{name}', function ($name) use ($app) {
    return $app['twig']->render('hello.twig', array(
        'name' => $name,
    ));
});

This will render a file named views/hello.twig.

In any Twig template, the app variable refers to the Application object. So you can access any service from within your view. For example to access $app['request']->getHost(), just put this in your template:

{{ app.request.host }}

A render function is also registered to help you render another controller from a template:

{{ render(app.request.baseUrl ~ '/sidebar') }}

{# or if you are also using UrlGeneratorServiceProvider with the SymfonyBridgesServiceProvider #}
{{ render(url('sidebar')) }}

Note

You must prepend the app.request.baseUrl to render calls to ensure that the render works when deployed into a sub-directory of the docroot.

Traits

Silex\Application\TwigTrait adds the following shortcuts:

• render: Renders a view with the given parameters and returns a Response object.

return $app->render('index.html', ['name' => 'Fabien']);

$response = new Response();
$response->setTtl(10);

return $app->render('index.html', ['name' => 'Fabien'], $response);

// stream a view
use Symfony\Component\HttpFoundation\StreamedResponse;

return $app->render('index.html', ['name' => 'Fabien'], new StreamedResponse());

Customization

You can configure the Twig environment before using it by extending the twig service:

$app['twig'] = $app->share($app->extend('twig', function($twig, $app) {
    $twig->addGlobal('pi', 3.14);
    $twig->addFilter('levenshtein', new \Twig_Filter_Function('levenshtein'));

    return $twig;
}));

For more information, check out the Twig documentation.