.. include:: /Includes.rst.txt .. index:: Events; ModifyGenericBackendMessagesEvent .. _ModifyGenericBackendMessagesEvent: ================================= ModifyGenericBackendMessagesEvent ================================= .. versionadded:: 12.0 This event serves as direct replacement for the now removed hook :php:`$GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['t3lib/class.t3lib_befunc.php']['displayWarningMessages']`. The PSR-14 event :php:`\TYPO3\CMS\Backend\Controller\Event\ModifyGenericBackendMessagesEvent` allows to add or alter messages that are displayed in the :guilabel:`About` module (default start module of the TYPO3 backend). Extensions such as the :doc:`EXT:reports ` system extension use this event to display custom messages based on the system status: .. include:: /Images/ManualScreenshots/Backend/GenericBackendMessage.rst.txt Example ======= Registration of an event listener in your extension's :file:`Services.yaml`: .. literalinclude:: _ModifyGenericBackendMessagesEvent/_Services.yaml :language: yaml :caption: EXT:my_extension/Configuration/Services.yaml Read :ref:`how to configure dependency injection in extensions `. The corresponding event listener class: .. literalinclude:: _ModifyGenericBackendMessagesEvent/_MyEventListener.php :language: php :caption: EXT:my_extension/Classes/Backend/EventListener/MyEventListener.php API === .. include:: /CodeSnippets/Events/Backend/ModifyGenericBackendMessagesEvent.rst.txt