TYPO3 v15 dev-main snapshot ()

2026-08-10 22:31:09 +02:00
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+.. include:: /Includes.rst.txt
+
+.. _deprecation-92494:
+
+================================================
+Deprecation: #92494 - Extbase EnvironmentService
+================================================
+
+See :issue:`92494`
+
+Description
+===========
+
+The extbase class :php:`TYPO3\CMS\Extbase\Service\EnvironmentService` is an API
+for TYPO3's legacy constant :php:`TYPO3_MODE`. That constant has been marked as
+deprecated in v11 and superseded by core API class
+:php:`TYPO3\CMS\Core\Http\ApplicationType`, which relies on a PSR-7 request
+to determine frontend or backend mode. The :php:`EnvironmentService` has now
+been marked as deprecated as a logical follow-up to these works.
+
+
+Impact
+======
+
+Using the class will trigger a PHP :php:`E_USER_DEPRECATED` error.
+
+
+Affected Installations
+======================
+
+Even though :php:`TYPO3\CMS\Extbase\Service\EnvironmentService` is :php:`@internal`, some extensions
+may still rely on it. The extension scanner will find usages.
+
+
+Migration
+=========
+
+Instances with extensions using that class should either make their code agnostic
+to frontend or backend mode, or use :php:`ApplicationType`. Code examples can
+be found in the `Changelog`_ file.
+
+.. _`Changelog`: https://docs.typo3.org/c/typo3/cms-core/main/en-us/Changelog/11.0/Deprecation-92947-DeprecateTYPO3_MODEAndTYPO3_REQUESTTYPEConstants.html
+
+.. index:: PHP-API, FullyScanned, ext:extbase