ModifyGenericBackendMessagesEvent¶
New in version 12.0: This event serves as direct replacement for the now removed hook
$GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['t3lib/class.t3lib_befunc.php']['displayWarningMessages']
.
This event allows to add or alter messages that are displayed in the "About" module (default start module of the TYPO3 Backend).
Extensions such as the system extension EXT:reports use this event to display custom messages based on the status of the system:

A generic backend message in the about module¶
Example¶
Registration of an event listener in your extensions' Services.yaml
:
MyVendor\MyExtension\Backend\MyEventListener:
tags:
- name: event.listener
identifier: 'my-package/backend/add-message'
The corresponding event listener class:
use TYPO3\CMS\Backend\Controller\Event\ModifyGenericBackendMessagesEvent;
use TYPO3\CMS\Core\Messaging\FlashMessage;
final class MyEventListener {
public function __invoke(ModifyGenericBackendMessagesEvent $event): void
{
// Add a custom message
$event->addMessage(new FlashMessage('My custom message'));
}
}
API¶
- class TYPO3\CMS\Backend\Controller\Event\ModifyGenericBackendMessagesEvent¶
Listeners to this event are able to add or change messages for the "Help > About" module.
- getMessages()¶
- Return type
array
- addMessage(TYPO3\\CMS\\Core\\Messaging\\AbstractMessage $message)¶
- Parameters
$message (
TYPO3\CMS\Core\Messaging\AbstractMessage
) -- the message
- setMessages(array $messages)¶
- Parameters
$messages (
array
) -- the messages