minor #7738 Deprecated the SYMFONY__ variables (javiereguiluz)

xabbuh · xabbuh · commit 7006c483b5f5 · 2017-04-15T16:34:08.000+02:00
This PR was merged into the master branch. Discussion ---------- Deprecated the SYMFONY__ variables This fixes #7695. Commits ------- 880da48 Deprecated the SYMFONY__ variables
diff --git a/configuration/external_parameters.rst b/configuration/external_parameters.rst
@@ -114,6 +114,12 @@ of the following:
 
 .. tip::
 
+    .. versionadded:: 3.3
+        The support of the special ``SYMFONY__`` environment variables was
+        deprecated in Symfony 3.3 and it will be removed in 4.0. Instead of
+        using those variables, define regular environment variables and get
+        their values using the ``%env(...)%`` syntax in your config files.
+
     You can also define the default value of any existing parameters using
     special environment variables named after their corresponding parameter
     prefixed with ``SYMFONY__`` after replacing dots by double underscores
