---
title: "Deprecation: #95317 - Legacy syntax for IRRE localize synchronize command in DataHandler"
manual: "TYPO3 Core Changelog"
version: "main"
permalink: "https://docs.typo3.org/permalink/changelog:deprecation-95317"
source: "Changelog/11.5/Deprecation-95317-LegacySyntaxForIRRELocalizeSynchronizeCommandInDataHandler.rst"
modified: "2026-09-14T09:47:36+00:00"
---

# Deprecation: #95317 - Legacy syntax for IRRE localize synchronize command in DataHandler

See [forge#95317](https://forge.typo3.org/issues/95317)

## Description

The `\TYPO3\CMS\Core\DataHandling\DataHandler`
command `inlineLocalizeSynchronize` now
triggers a PHP `E_USER_DEPRECATED` error if the incoming command payload is sent
as comma-separated list rather than an array.

The array allows to synchronize/localize multiple values at once,
which is preferred since TYPO3 v7.6, and used in TYPO3 properly
since then.

## Impact

Calling DataHandler `process_cmdmap` with an incoming
command for `inlineLocalizeSynchronize` with a payload
of comma-separated values will trigger a PHP `E_USER_DEPRECATED` error.

## Affected Installations

TYPO3 installations with custom code related to DataHandler
and modifying the `inlineLocalizeSynchronize` command,
which is highly unlikely. This only affects special
handling of inline configuration fields.

## Migration

See [changelog](https://docs.typo3.org/permalink/changelog:important-71126)
for further information on how to migrate your incoming
DataHandler command.