How to get config parameters in Symfony2 Twig Templates

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');

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.

You can also take advantage of the built-in Service Parameters system, which lets you isolate or reuse the value:

# app/config/parameters.ymlparameters:    ga_tracking: UA-xxxxx-x# app/config/config.ymltwig:    globals:        ga_tracking: "%ga_tracking%"

Now, the variable ga_tracking is available in all Twig templates:

<p>The google tracking code is: {{ ga_tracking }}</p>

The parameter is also available inside the controllers:

$this->container->getParameter('ga_tracking');

You can also define a service as a global Twig variable (Symfony2.2+):

# app/config/config.ymltwig:    # ...    globals:        user_management: "@acme_user.user_management"

http://symfony.com/doc/current/templating/global_variables.html

If the global variable you want to set is more complicated - say an object - then you won't be able to use the above method. Instead, you'll need to create a Twig Extension and return the global variable as one of the entries in the getGlobals method.