Twig_Environment::addGlobal PHP Method

    public function addGlobal($name, $value)
    {
        if (null === $this->globals) {
            $this->getGlobals();
        }

        $this->globals[$name] = $value;
    }

 /**
  * Sets up Twig ready for use and returns it
  * @return \Twig_Environment
  */
 protected function getTwigEnvironment()
 {
     /**
      * Get the config
      * @var \snb\config\ConfigInterface $config
      */
     $config = $this->container->get('config');
     $kernel = $this->container->get('kernel');
     // Find the cache path
     $cachePath = $config->get('twig.cache', ':/cache');
     // Use our loader the know how to map resource names to filenames
     $loader = new TwigFileLoader($this->container);
     // use the default environment. Should pass settings over from the config
     $twig = new \Twig_Environment($loader, array('cache' => $kernel->findPath($cachePath), 'debug' => $kernel->isDebug()));
     // Add the dump command (only works when debug is true)
     $twig->addExtension(new \Twig_Extension_Debug());
     // Add the app as a global...
     $twig->addGlobal('app', $kernel);
     // Add all the extensions that have been registered with the service provider
     $globals = $this->container->getMatching('twig.global.*');
     foreach ($globals as $global) {
         if ($global instanceof ViewGlobalInterface) {
             $twig->addGlobal($global->getGlobalName(), $global);
         }
     }
     // Add all the extensions that have been registered with the service provider
     $extensions = $this->container->getMatching('twig.extension.*');
     foreach ($extensions as $ext) {
         $twig->addExtension($ext);
     }
     return $twig;
 }