Deprecation: #92607 - Deprecated GeneralUtility::uniqueList

See Issue #92607


Since over a decade, the GeneralUtility::uniqueList() method does not accept an array as first argument anymore. Furthermore the second parameter was since then not longer be used. Both have thrown an InvalidArgumentException.

As the method doesn’t belong to GeneralUtility at all, a new refactored version was added to StringUtility. Therefore, the exceptions were removed along with the unused second parameter. The first parameter is now type hinted string and the return type string was added. Furthermore, the PHPDoc was updated accordingly.


Calling the method will trigger a PHP deprecation notice.

Affected Installations

TYPO3 installations with custom third-party extensions calling this method.


Use the new StringUtility::uniqueList() method instead and ensure you pass a valid string as first argument and ommit the second argument.