Dec 14, 2016 · Dec 5, 2016
diff --git a/best_practices/configuration.rst b/best_practices/configuration.rst

 When dealing with sensitive options, like database credentials, we also recommend
 that you store them outside the Symfony project and make them available
 through environment variables. Learn how to do it in the following article:
 :doc:`/configuration/external_parameters`.
 through environment variables:

 .. code-block:: yaml

    # app/config/config.yml
    doctrine:
        dbal:
            # ...
            password: "%env(DB_PASSWORD)%"

 .. versionadded:: 3.2
   Support for runtime environment variables via the ``%env(...)%`` syntax was
   added in Symfony 3.2. Prior to version 3.2, you needed to use the
   :doc:`special SYMFONY__ variables </configuration/external_parameters>`.

 .. _`feature toggles`: https://en.wikipedia.org/wiki/Feature_toggle
 .. _`constant() function`: http://twig.sensiolabs.org/doc/functions/constant.html
Original file line number	Diff line number	Diff line change
Expand Up		@@ -175,8 +175,20 @@ Moving Sensitive Options Outside of Symfony Entirely

		When dealing with sensitive options, like database credentials, we also recommend
		that you store them outside the Symfony project and make them available
		through environment variables. Learn how to do it in the following article:
		:doc:`/configuration/external_parameters`.
		through environment variables:

		.. code-block:: yaml

		# app/config/config.yml
		doctrine:
		dbal:
		# ...
		password: "%env(DB_PASSWORD)%"

		.. versionadded:: 3.2
		Support for runtime environment variables via the ``%env(...)%`` syntax was
		added in Symfony 3.2. Prior to version 3.2, you needed to use the
		:doc:`special SYMFONY__ variables </configuration/external_parameters>`.

		.. _`feature toggles`: https://en.wikipedia.org/wiki/Feature_toggle
		.. _`constant() function`: http://twig.sensiolabs.org/doc/functions/constant.html