---
title: "Deprecation: #90249 - Package related Signal Slots migrated to PSR-14 events"
manual: "TYPO3 Core Changelog"
version: "main"
permalink: "https://docs.typo3.org/permalink/changelog:deprecation-90249"
source: "Changelog/10.3/Deprecation-90249-PackageRelatedSignalSlotsMigratedToPSR-14Events.rst"
typo3-version: "10.3"
typo3-major: 10
type: "deprecation"
issue: 90249
forge: "https://forge.typo3.org/issues/90249"
tags: ["PHP-API", "FullyScanned", "ext:core"]
rendered: "2026-09-20T18:31:11+00:00"
---

# Deprecation: #90249 - Package related Signal Slots migrated to PSR-14 events {#deprecation-90249}

See [forge#90249](https://forge.typo3.org/issues/90249)

## Description {#description}

The following Signal Slots have been replaced by new PSR-14 events
which can be used as 1:1 equivalents:

-   `PackageManagement::packagesMayHaveChanged`
-   `TYPO3\CMS\Extensionmanager\Utility\InstallUtility::afterExtensionInstall`
-   `TYPO3\CMS\Extensionmanager\Utility\InstallUtility::afterExtensionUninstall`
-   `TYPO3\CMS\Extensionmanager\Utility\InstallUtility::afterExtensionT3DImport`
-   `TYPO3\CMS\Extensionmanager\Utility\InstallUtility::afterExtensionStaticSqlImport`
-   `TYPO3\CMS\Extensionmanager\Utility\InstallUtility::afterExtensionFileImport`
-   `TYPO3\CMS\Extensionmanager\Service\ExtensionManagementService::willInstallExtensions`
-   `TYPO3\CMS\Extensionmanager\ViewHelper\ProcessAvailableActionsViewHelper::processActions`

## Impact {#impact}

Using the mentioned signals will trigger a PHP `E_USER_DEPRECATED` error.

## Affected Installations {#affected-installations}

TYPO3 installations with custom extensions using these signals.

## Migration {#migration}

Use the new PSR-14 alternatives:

-   `\TYPO3\CMS\Core\Package\Event\PackagesMayHaveChangedEvent`
-   `\TYPO3\CMS\Core\Package\Event\AfterPackageActivationEvent`
-   `\TYPO3\CMS\Core\Package\Event\AfterPackageDeactivationEvent`
-   `\TYPO3\CMS\Core\Package\Event\BeforePackageActivationEvent`
-   `\TYPO3\CMS\Extensionmanager\Event\AfterExtensionDatabaseContentHasBeenImportedEvent`
-   `\TYPO3\CMS\Extensionmanager\Event\AfterExtensionStaticDatabaseContentHasBeenImportedEvent`
-   `\TYPO3\CMS\Extensionmanager\Event\AfterExtensionFilesHaveBeenImportedEvent`
-   `\TYPO3\CMS\Extensionmanager\Event\AvailableActionsForExtensionEvent`