---
title: "Breaking: #97451 - Removed BackendController page hooks"
manual: "TYPO3 Core Changelog"
version: "main"
permalink: "https://docs.typo3.org/permalink/changelog:breaking-97451"
source: "Changelog/12.0/Breaking-97451-RemoveBackendControllerPageHooks.rst"
typo3-version: "12.0"
typo3-major: 12
type: "breaking"
issue: 97451
forge: "https://forge.typo3.org/issues/97451"
tags: ["Backend", "PHP-API", "FullyScanned", "ext:backend"]
rendered: "2026-09-25T23:17:45+00:00"
---

# Breaking: #97451 - Removed BackendController page hooks {#breaking-97451}

See [forge#97451](https://forge.typo3.org/issues/97451)

## Description {#description}

The hooks `$GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['typo3/backend.php']['constructPostProcess']`,
`$GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['typo3/backend.php']['renderPreProcess']`, and
`$GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['typo3/backend.php']['renderPostProcess']` have
been removed in favor of a new PSR-14 event `\TYPO3\CMS\Backend\Controller\Event\AfterBackendPageRenderEvent`.

Additionally, the `BackendController->addCss()` method has been removed without replacement,
as it is no longer used.

## Impact {#impact}

Any hook implementation registered is not executed anymore in
TYPO3 v12.0+. The extension scanner will report possible usages.

## Affected Installations {#affected-installations}

All TYPO3 installations using this hook in custom extension code.

## Migration {#migration}

The hooks are 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-97451)
as an improved replacement.