app_variable.rst

.. index::
    single: Templating; app Variable

How to Access the User, Request, Session & more in Twig via the app Variable

During each request, Symfony will set a global template variable app in both Twig and PHP template engines by default. The app variable is a :class:`Symfony\\Bridge\\Twig\\AppVariable` instance which will give you access to some application specific variables automatically:

app.user

The representation of the current user or null if there is none. The value stored in this variable can be a :class:`Symfony\\Component\\Security\\Core\\User\\UserInterface` object, any other object which implements a __toString() method or even a regular string.

app.request

The :class:`Symfony\\Component\\HttpFoundation\\Request` object that represents the current request (depending on your application, this can be a sub-request or a regular request, as explained later).

app.session

The :class:`Symfony\\Component\\HttpFoundation\\Session\\Session` object that represents the current user's session or null if there is none.

app.environment

The name of the current environment (dev, prod, etc).

app.debug

True if in debug mode. False otherwise.

<p>Username: {{ app.user.username }}</p>
{% if app.debug %}
    <p>Request method: {{ app.request.method }}</p>
    <p>Application Environment: {{ app.environment }}</p>
{% endif %}

Tip

You can add your own global template variables, see :doc:`/templating/global_variables`.