Breaking: #88660 - $GLOBALS[T3_VAR] removed

See Issue #88660

Description

The global variable $GLOBALS['T3_VAR'] previously used to hold global state for special use cases - previously used within Service API via GeneralUtility::makeInstanceService() and to magically inject special hard-coded local indexed search files, has been removed.

The overall goal of TYPO3’s application is to not keep any state within global variables, and the T3_VAR (“TYPO3 Various”) has not been actively used for that anymore since TYPO3 6.0, and has been kept only for backwards-compatibility of the existing solutions.

The initialization of the global variable during TYPO3 Bootstrap, any usages of T3_VAR, especially within “indexed search” has been removed.

Impact

Accessing $GLOBALS['T3_VAR'] is fully custom and not evaluated by TYPO3 Core anymore.

Using the variable to modify any global state for e.g. Indexed Search’s indexer via $GLOBALS['T3_VAR']['ext']['indexed_search']['indexLocalFiles'] is not respected anymore and has no effect.

Affected Installations

TYPO3 installations with third-party extensions or code within AdditionalConfiguration.php that actively set or read values from the global variable.

Migration

Use your own custom global namespace to identify that your specific extension code has nothing to do with TYPO3’s legacy work.

Use specific hooks for indexing local files used by download extensions in conjunction with Indexed Search.