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Nov 14, 2023
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docs: add about Controller returns string/Response #8199

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4 changes: 3 additions & 1 deletion user_guide_src/source/incoming/controllers.rst
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Expand Up @@ -11,7 +11,9 @@ Controllers are the heart of your application, as they determine how HTTP reques
What is a Controller?
*********************

A Controller is simply a class file that handles a HTTP request. :doc:`URI Routing <routing>` associates a URI with a controller.
A Controller is simply a class file that handles a HTTP request.
:doc:`URI Routing <routing>` associates a URI with a controller. It returns a
view string or ``Response`` object.

Every controller you create should extend ``BaseController`` class.
This class provides several features that are available to all of your controllers.
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2 changes: 2 additions & 0 deletions user_guide_src/source/installation/upgrade_controllers.rst
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Expand Up @@ -20,6 +20,8 @@ What has been changed
- CI4 provides :doc:`Request </incoming/incomingrequest>` and :doc:`Responses </outgoing/response>`
objects for you to work with - more powerful than the CI3-way.
- If you want a base controller (``MY_Controller`` in CI3), use **app/Controllers/BaseController.php**.
- Calling ``echo`` within Controllers, as in CI3, is still supported, but
it is recommended that a string or Response object be returned from Controllers.

Upgrade Guide
=============
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