Deprecation: #99416 - Various doctype related properties and methods

See forge#99416

Description

Due to the introduction of a unified definition of the DocType that should render HTML, XML or XHTML-compliant content either in TYPO3 Frontend Rendering or Backend rendering, various methods and properties have been marked as deprecated, as they are superfluous now:

TYPO3\CMS\Core\Page\PageRenderer->setRenderXhtml() TYPO3\CMS\Core\Page\PageRenderer->getRenderXhtml() TYPO3\CMS\Core\Page\PageRenderer->setMetaCharsetTag() TYPO3\CMS\Core\Page\PageRenderer->getMetaCharsetTag() TYPO3\CMS\Core\Page\PageRenderer->setCharSet() TYPO3\CMS\Core\Page\PageRenderer->getCharSet() TYPO3\CMS\Frontend\Controller\TypoScriptFrontendController->xhtmlDoctype TYPO3\CMS\Frontend\Controller\TypoScriptFrontendController->xhtmlVersion

Impact

Calling one of the methods or accessing / writing one of the properties mentioned will trigger a PHP deprecation message.

Affected installations

TYPO3 installations with custom extensions reading or writing these properties or methods directly in PHP, which is unlikely.

Migration

Use PageRenderer->setDocType() to manipulate the output in a programmatic way, or use PageRenderer->getDocType() to read the current doctype — e.g. "is the current page HTML5 compliant.

Various TypoScript properties will instruct PageRenderer as before, there is no need to use other configuration options. It is however, recommended to use config.doctype in favor of config.xhtmlDoctype in TypoScript as it considers more possible options.