Use Pug in a Silex app

silex-pug.php

<?php

// Install Pug with: composer require pug-php/pug

$app['view'] = function () {
    return new Pug(array(
        'cache' => './storage/cache',
        'paths' => array(
            // Here you can record differents root directories
            // containing pug templates.
            './views',
        ),
    ));
};

$app->get('/hello/{name}', function ($name) use ($app) {
    // Supposing you have a template stored in ./views/hello.pug
    return $app['view']->renderFile('hello', array(
        'name' => $name,
    ));
});

// You can call the service more explicitly $app['pug'] and call explicitly
// templates files with extensions ->renderFile('hello.pug')
// but the benefit of the "view" naming and extension omit is it allow you
// to easily switch to an other template engine.