File::addPathSite() 

\nn\t3::File()->addPathSite($file); 

Specifies path to file / folder WITH absolute path

Example:

\nn\t3::File()->addPathSite('fileadmin/test.jpg');
 // ==> returns var/www/website/fileadmin/test.jpg

| @return string

public function addPathSite($file)
{
	return $this->stripPathSite($file, true);
}