handles file includes, this adapter has the potential to be much faster than other

filesystem-based caches.

..caution::

If you have configured OPcache to

:ref:`not check the file timestamps<performance-dont-check-timestamps>`

the cached items will not not be invalidated unless you clear OPcache.

The PhpFilesAdapter can optionally be provided a namespace, default cache lifetime, and cache

directory path as constructor arguments::

Once you've created your handler, you need to register it:

Message handlers must be registered as services and:doc:`tagged</service_container/tags>`

with the ``messenger.message_handler`` tag. If you're using the

:ref:`default services.yaml configuration<service-container-services-load-example>`,

this is already done for you, thanks to:ref:`autoconfiguration<services-autoconfigure>`.

If you're not using service autoconfiguration, then you need to add this config:

..configuration-block::