minor #7374 Added a note about case-insensitiveness of service ids (javiereguiluz)

xabbuh · xabbuh · commit 94a157adae53 · 2017-01-31T22:25:29.000+01:00
This PR was squashed before being merged into the master branch (closes #7374). Discussion ---------- Added a note about case-insensitiveness of service ids This fixes #7367. I propose to add just a small note because my guess it that the case-insensitive behavior is unused by 99.99% of developers and most of them are even unaware of it. Commits ------- 0071fae Added a note about case-insensitiveness of service ids
diff --git a/service_container.rst b/service_container.rst
@@ -154,6 +154,12 @@ later how you can configure a service that has multiple instances in the
     ``get()`` method to locate and retrieve the ``app.mailer`` service from
     the service container.
 
+.. caution::
+
+    Service identifiers are case-insensitive (``app.mailer`` and ``APP.Mailer``
+    for example refer to the same service). This behavior was deprecated in
+    Symfony 3.3 and it will no longer work in Symfony 4.0.
+
 .. _service-container-parameters:
 
 Service Parameters
