TYPO3 v15 dev-main snapshot ()

2026-08-10 22:31:09 +02:00
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+.. include:: /Includes.rst.txt
+
+.. _breaking-85025:
+
+=============================================
+Breaking: #85025 - Enumerations are now final
+=============================================
+
+See :issue:`85025`
+
+Description
+===========
+
+All enumeration classes in TYPO3 have been marked as :php:`final` which prevents extension by 3rd party code.
+
+By definition an enumeration is a limited and known set of values, any code which uses enumeration relies on this fact.
+If an enumeration was extended by 3rd party code undefined behavior would occur. For this reason no enumerations must be extended.
+
+Developers of 3rd party extensions are also encouraged to mark their enumerations as :php:`final`.
+
+
+Impact
+======
+
+Classes extending TYPO3 enumerations will trigger a fatal PHP error.
+
+
+Affected Installations
+======================
+
+Instances with classes extending TYPO3 enumerations.
+
+
+Migration
+=========
+
+Remove the classes which extend TYPO3 enumerations.
+
+.. index:: PHP-API, NotScanned