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11 changes: 11 additions & 0 deletions components/http_kernel.rst
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Expand Up @@ -580,6 +580,17 @@ at the moment the exception was thrown.

.. _http-kernel-creating-listener:

10) Resetting the state of request/response flow
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

PHP is designed to be stateless, there are no shared resources across different
requests. However, with some specific Runtime (ie FrankenPHP in worker mode), the
kernel can handle multiple request/response, and so you need to take care of cleaning
some services state to not leak memory if needed.

To do so, your service must implement the :class:`Symfony\\Contracts\\Service\\ResetInterface`
where you can reset the properties in the ``reset()`` method.

Creating an Event Listener
--------------------------

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