How to get config parameters in Symfony2 Twig Templates

I have a Symfony2 Twig template. I want to output the value of a config parameter in this twig template (a version number). Therefore I defined the config parameter like this:

parameters:
    app.version: 0.1.0

I'm able to use this config parameter in Controllers but I have no clue how to get it in my Twig template.

Solution 1:

You can use parameter substitution in the twig globals section of the config:

Parameter config:

parameters:
    app.version: 0.1.0

Twig config:

twig:
    globals:
        version: '%app.version%'

Twig template:

{{ version }}

This method provides the benefit of allowing you to use the parameter in ContainerAware classes as well, using:

$container->getParameter('app.version');

Solution 2:

Easily, you can define in your config file:

twig:
    globals:
        version: "0.1.0"

And access it in your template with

{{ version }}

Otherwise it must be a way with an Twig extension to expose your parameters.