diff --git a/components/dotenv.rst b/components/dotenv.rst
index 6d7a4adffba..397962df817 100644
--- a/components/dotenv.rst
+++ b/components/dotenv.rst
@@ -49,7 +49,7 @@ Load a ``.env`` file in your PHP application via ``Dotenv::load()``::
Given the following ``.env`` file content:
-.. code-block:: bash
+.. code-block:: shell
# .env
DB_USER=root
@@ -76,11 +76,11 @@ shell scripts:
.. code-block:: terminal
- source .env
+ $ source .env
Add comments by prefixing them with ``#``:
-.. code-block:: bash
+.. code-block:: shell
# Database credentials
DB_USER=root
@@ -88,14 +88,25 @@ Add comments by prefixing them with ``#``:
Use environment variables in values by prefixing variables with ``$``:
-.. code-block:: bash
+.. code-block:: shell
DB_USER=root
DB_PASS=${DB_USER}pass # Include the user as a password prefix
+.. note::
+
+ When using the Dotenv component within the Symfony Framework, beware that
+ variables can't contain container parameters because they are not resolved:
+
+ .. code-block:: shell
+
+ # '%kernel.project_dir%' is not resolved, so the value of this
+ # variable won't be the expected one and the application won't work
+ DATABASE_URL=sqlite:///%kernel.project_dir%/test.db
+
Embed commands via ``$()`` (not supported on Windows):
-.. code-block:: bash
+.. code-block:: shell
START_TIME=$(date)
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