---
title: "Deprecation: #90937 - Various hooks in ContentObjectRenderer"
manual: "TYPO3 Core Changelog"
version: "main"
permalink: "https://docs.typo3.org/permalink/changelog:deprecation-90937"
source: "Changelog/10.4/Deprecation-90937-VariousHooksInContentObjectRenderer.rst"
modified: "2026-09-15T10:46:36+00:00"
---

# Deprecation: #90937 - Various hooks in ContentObjectRenderer

See [forge#90937](https://forge.typo3.org/issues/90937)

## Description

The following hooks within class `ContentObjectRenderer` have been marked as deprecated:

-   `$GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['tslib/class.tslib_content.php']['cObjTypeAndClass']`
-   `$GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['tslib/class.tslib_content.php']['cObjTypeAndClassDefault']`
-   `$GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['tslib/class.tslib_content.php']['extLinkATagParamsHandler']`
-   `$GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['tslib/class.tslib_content.php']['typolinkLinkHandler']`

All hooks have been available for a long time, and several new concepts and APIs that have been added in previous LTS versions already, that superseded these hooks.

## Impact

Extensions registering the any one of the hooks listed above will trigger a PHP `E_USER_DEPRECATED` error when the code is executed.

## Affected Installations

TYPO3 installations with older extensions implementing one of the hooks above, which is very rare and only serve specific use-cases
for rendering ContentObjects or custom link style tags that are not related to TYPO3 v8 linking syntax (`t3://...`).

## Migration

The hooks `cObjTypeAndClass` and `cObjTypeAndClassDefault` can be simplified by using the new way of registering custom ContentObjects via:

`$GLOBALS['TYPO3_CONF_VARS']['FE']['ContentObjects']` \- see `EXT:frontend/ext_localconf.php` for examples - TYPO3 Core adds its shipped ContentObjects exactly the same way.

The `typolinkLinkHandler` hook is used for registering custom link syntax that start with a certain keyword such as "news:13".

Since TYPO3 v8, LinkHandler support has been added to TYPO3 Core natively, using the new `t3://` syntax.
The "LinkHandler" registry can be extended via `$GLOBALS['TYPO3_CONF_VARS']['SYS']['linkHandler']`
and `$GLOBALS['TYPO3_CONF_VARS']['FE']['typolinkBuilder']` that serves the same purpose with a better API.