Environment::getPathSite() 

\nn\t3::Environment()->getPathSite(); 

Get the absolute path to the Typo3 root directory. e.g. /var/www/website/

\nn\t3::Environment()->getPathSite()

Formerly: PATH_site

public function getPathSite () {
	return \TYPO3\CMS\Core\Core\Environment::getPublicPath().'/';
}