Breaking: #97065 - TYPO3 Frontend always rendered in UTF-8

See Issue #97065

Description

For historical reasons, it was possible to change the actual rendering charset of TYPO3’s Frontend Output to a specific character set, and also to modify the “renderCharset”, which was removed in TYPO3 v8.0. Since TYPO3 v6, the default rendering output was set to “utf-8”, and nowadays, it has become a niche to change the output rendering charset to a different value than UTF-8.

For this reason, the TypoScript setting config.metaCharset has no effect anymore as all rendering for Frontend is “utf-8” and not changeable anymore.

If this TypoScript setting was set to “utf-8” in previous installations, this line could have been removed anyways already.

The public PHP property TypoScriptFrontendController->metaCharset is removed, along with the public method TypoScriptFrontendController->convOutputCharset().

Impact

TYPO3 installations with a different setting than “utf-8” will now output “utf-8” output at all times.

TYPO3 extensions accessing the removed property will trigger a PHP warning, or calling the removed method convOutputCharset() will see a fatal PHP error.

Affected Installations

TYPO3 installations using config.metaCharset set to a value other than utf-8, or accessing the removed property or method. The Extension Scanner in the Install Tool will detect usages of the removed property and method.

Migration

TYPO3 Installations with a different charset than UTF-8 should convert their own content in a custom middleware, as this specific use-case is not supported by TYPO3 Core anymore.

TYPO3 installations with TypoScript option set config.metaCharset = utf-8 can remove the TypoScript line in previous supported TYPO3 versions.

Any usage of the removed property / method should be removed.