---
title: "Deprecation: #102821 - ExtensionManagementUtility::addPItoST43()"
manual: "TYPO3 Core Changelog"
version: "main"
permalink: "https://docs.typo3.org/permalink/changelog:deprecation-102821-1709843835"
source: "Changelog/13.3/Deprecation-102821-ExtensionManagementUtilityaddPItoST43.rst"
typo3-version: "13.3"
typo3-major: 13
type: "deprecation"
issue: 102821
forge: "https://forge.typo3.org/issues/102821"
tags: ["LocalConfiguration", "PHP-API", "FullyScanned", "ext:core"]
rendered: "2026-09-20T18:31:11+00:00"
---

# Deprecation: #102821 - ExtensionManagementUtility::addPItoST43() {#deprecation-102821-1709843835}

See [forge#102821](https://forge.typo3.org/issues/102821)

## Description {#description}

The method `\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addPItoST43()`
has been marked as deprecated in TYPO3 v13 and will be removed with TYPO3 v14.

## Impact {#impact}

Using the `ExtensionManagementUtility::addPItoST43()` will raise a deprecation
level log entry and a fatal error in TYPO3 v14.

## Affected installations {#affected-installations}

Extensions using `ExtensionManagementUtility::addPItoST43()` are affected:
Using `ExtensionManagementUtility::addPItoST43()` triggers a deprecation level log message.
The extension scanner will find usages of `ExtensionManagementUtility::addPItoST43()` as strong match.

## Migration {#migration}

```php
// Before:
\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addPItoST43('my_extkey', '', '_pi1');
\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addTypoScript(
    'tx_myextkey',
    'setup',
    'plugin.tx_myextkey_pi1.userFunc = MY\MyExtkey\Plugins\Plugin->main'
);

// After:
\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addTypoScript(
    'my_extkey',
    'setup',
    'plugin.tx_myextkey_pi1 = USER_INT
     plugin.tx_myextkey_pi1.userFunc = MY\MyExtkey\Plugins\Plugin->main'
);
```