Deprecation: #92992 - Hook t3lib_parsehtml_proc.php:transformation 

See forge#92992

Description 

Since the deprecation of several internal functions in the \TYPO3\CMS\Core\Html\RteHtmlParser in TYPO3 10.2 (Deprecation: #86440 - Internal Methods and properties within RteHtmlParser) the hook t3lib/class.t3lib_parsehtml_proc.php:transformation became quite useless.

It is therefore marked as deprecated and will be removed with TYPO3 v12.

Impact 

Calling the hook will trigger a PHP E_USER_DEPRECATED error.

Affected Installations 

All installations with extensions installed that implement the hook.

Migration 

Migrate to use the public API only and use other options (such as allowAttributes ) in order to only run certain instructions on the RteHtmlParser object.