---
title: "Breaking: #96899 - \"displayWarningMessages\" hook removed"
manual: "TYPO3 Core Changelog"
version: "main"
permalink: "https://docs.typo3.org/permalink/changelog:breaking-96899"
source: "Changelog/12.0/Breaking-96899-DisplayWarningMessagesHookRemoved.rst"
typo3-version: "12.0"
typo3-major: 12
type: "breaking"
issue: 96899
forge: "https://forge.typo3.org/issues/96899"
tags: ["Backend", "PHP-API", "FullyScanned", "ext:backend"]
rendered: "2026-09-17T12:41:04+00:00"
---

# Breaking: #96899 - "displayWarningMessages" hook removed {#breaking-96899-displaywarningmessages-hook-removed}

See [forge#96899](https://forge.typo3.org/issues/96899)

## Description {#description}

The hook `$GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['t3lib/class.t3lib_befunc.php']['displayWarningMessages']`
has been removed in favor of a new PSR-14 event
`\TYPO3\CMS\Backend\Controller\Event\ModifyGenericBackendMessagesEvent`.

The hook was used to display messages in the About module.

## Impact {#impact}

Registered hooks are not executed anymore.

## Affected Installations {#affected-installations}

TYPO3 installations with custom extensions using this hook, which is very
unlikely. The extension scanner will report possible usages.

## Migration {#migration}

The hook is removed without deprecation in order to allow extensions
to work with TYPO3 v11 (using the hook) and v12+ (using the new event).

Use the [PSR-14 event](https://docs.typo3.org/permalink/changelog:feature-96899)
as a direct replacement.