Extracted ZF2 view registartion for use in silex

usage.php

<?php
$app = new \Silex\Application();

$app->register(new \VendorNs\Silex\Provider\ViewServiceProvider(), [
    'view.options' => ['template_path_stack' => __DIR__ . '/view'],
]);

$app->get('/about', function(\Silex\Application $app) {
    return $app['view']->render('app/about', null, 'app/layout');
})
    ->bind('about');

VendorNs\Silex\Provider\ViewServiceProvider.php

<?php

namespace VendorNs\Silex\Provider;

use VendorNs\Silex\View;
use Silex\Application;
use Silex\ServiceProviderInterface;
use Zend\Form\View\HelperConfig as FormHelperConfig;
use Zend\View\Helper\FlashMessenger;
use Zend\View\Resolver as ViewResolver;

class ViewServiceProvider implements ServiceProviderInterface
{
    public function register(Application $app)
    {
        $app['view.options'] = array();

        $app['view.templatemap'] = $app->share(function ($app) {
            $map = isset($app['view.options']['template_map'])
                ? (array) $app['view.options']['template_map']
                : array();
            return new ViewResolver\TemplateMapResolver($map);
        });

        $app['view.templatepathstack'] = $app->share(function ($app) {
            $templatePathStack = new ViewResolver\TemplatePathStack();

            if (isset($app['view.options']['template_path_stack'])) {
                $templatePathStack->addPaths(
                    (array)$app['view.options']['template_path_stack']
                );
            }
            return $templatePathStack;
        });

        $app['view'] = $app->share(function ($app) {
            $resolver = new ViewResolver\AggregateResolver();
            $resolver->attach($app['view.templatemap']);
            $resolver->attach($app['view.templatepathstack']);
            $renderer =  new View($app);
            $renderer->setResolver($resolver);
            $renderer->plugin('basePath')->setBasePath($app['request']->getBasePath());
            if (class_exists(FormHelperConfig::class, true)) {
                $helperConfig = new FormHelperConfig;
                $helperConfig->configureServiceManager($renderer->getHelperPluginManager());
            }
            // Override. Helper factory depends on controller plugin factory.
            $renderer->getHelperPluginManager()->setService(
                'flashMessenger',
                $app['view.flash_messenger']
            );
            return $renderer;
        });

        $app['flash_messenger'] = $app->share(function ($app) {
            return $app['view']->flashMessenger()->getPluginFlashMessenger();
        });

        $app['view.flash_messenger'] = $app->share(function ($app) {
            $flash = new FlashMessenger;
            $flash->setMessageOpenFormat(
                '<div%s><button data-dismiss="alert" class="close" type="button">'
                .'<i class="icon-remove"></i></button>'
             )
             ->setMessageSeparatorString('</li><li>')
             ->setMessageCloseString('</li></ul></div>');

            return $flash;
        });
    }

    public function boot(Application $app)
    {
    }
}

VendorNs\Silex\View.php

<?php

namespace VendorNs\Silex;

use Zend\View\Renderer\PhpRenderer;

class View extends PhpRenderer
{
    protected $app;
    protected $__silexapp;

    public function __construct($app)
    {
        $this->app = $this->__silexapp = $app;
    }

    public function render($nameOrModel, $values = null, $layout = null, $layoutValues = array())
    {
        $content = parent::render($nameOrModel, $values);
        if (isset($layout)) {
            return parent::render(
                $layout,
                array_merge($layoutValues, array('content' => $content))
            );
        }
        return $content;
    }
}