Deprecation: #85858 - GeneralUtility::clientInfo()

See Issue #85858

Description

The helper method GeneralUtility::clientInfo() responsible for parsing the server variable $_SERVER['HTTP_USER_AGENT'] has been marked as deprecated.

This method is not up-to-date with current browser headers, and in light of browser that are able to fake the HTTP_USER_AGENT the detection is not practical anymore.

Impact

Calling the method directly will trigger a PHP E_USER_DEPRECATED error.

Affected Installations

Any TYPO3 installation with extensions directly calling this method.

Migration

Depending on the use-case, it is best to use the PSR-7-based request object, if available in the context, or $_SERVER['HTTP_USER_AGENT'] to detect a specific browser/client user agent.