Deprecation: #84273 - Protected methods and properties in FileSystemNavigationFrameController

See Issue #84273


This file is about third party usage (consumer that call the class as well as signals or hooks depending on it) of TYPO3\CMS\Backend\Controller\FileSystemNavigationFrameController .

A series of class properties have been set to protected. They will throw deprecation warnings if called public from outside:

  • [not scanned] $content
  • $foldertree
  • $currentSubScript
  • $cMR

All methods not used as entry points by TYPO3\CMS\Backend\Http\RouteDispatcher will be removed or set to protected in v10 and throw deprecation warnings if used from a third party:

  • initPage()
  • [not scanned] main()
  • [not scanned] init()


Calling one of the above methods or accessing one of the above properties on an instance of FileSystemNavigationFrameController will throw a deprecation warning in v9 and a PHP fatal in v10.

Affected Installations

The extension scanner will find most usages, but may also find some false positives. The most common property and method names like $content are not registered and will not be found if an extension uses that on an instance of FileSystemNavigationFrameController . In general all extensions that set properties or call methods except mainAction() are affected.


In general, extensions should not instantiate and re-use controllers of the core. Existing usages should be rewritten to be free of calls like these.