Breaking: #96982 - Removed support for global extensions¶
Historically, TYPO3 installations could load extensions from
where developers and site administrators could share extensions through
multiple installations on the same server via symlinks.
This feature was possible by enabling
$GLOBALS[TYPO3_CONF_VARS][EXT][allowGlobalInstall] which was disabled
by default since TYPO3 4.0, as using this feature had several downsides with
Non-Composer based installations. Features such as "Automatic Updates" are
not possible having this functionality enabled.
In Composer-based installations, this functionality was never supported in a proper way.
This functionality including the feature toggle have been removed in TYPO3 v12.0.
Extensions within the folder
typo3/ext/ will be ignored in TYPO3 v12.0
and will be automatically disabled.
The global option to enable this feature will be removed from
LocalConfiguration.php automatically once the Install Tool / Maintenance module
is loaded the next time, if the option is activated.
TYPO3 installations having the global option enabled, and have loaded extensions
typo3/ext/, which is unlikely in 2022.
It is recommended to either migrate to Composer Mode, or to use symlinks
typo3conf/ext/ (Local Extensions) to load the same extension for
multiple TYPO3 installations at once.