@@ -382,6 +382,21 @@ a new ``locale`` parameter is added to the ``config/services.yaml`` file).
382382 They are useful when working with:ref: `Compiler Passes </service_container/compiler_passes >`
383383 to declare some temporary parameters that won't be available later in the application.
384384
385+ Configuration parameters are usually constraint-free, but you can ensure that
386+ essential parameters for your application's functionality are present and not
387+ empty::
388+
389+ // ContainerBuilder
390+ $container->nonEmptyParameter('app.private_key', 'Did you forget to configure the "app.private_key" parameter?');
391+
392+ If a non-empty parameter is missing or empty (e.g. ``null ``, an empty string ``'' ``,
393+ or an empty array ``[] ``), Symfony will throw an exception with the custom error
394+ message when attempting to retrieve the value of this parameter.
395+
396+ ..versionadded ::7.2
397+
398+ Defining non-empty parameters was introduced in Symfony 7.2.
399+
385400..seealso ::
386401
387402 Later in this article you can read how to