It would be so nice to set the open_basedir in php.ini to the current user's home directory: open_basedir = "~"

We are hosting several virtual sites. They run php whith their own UID (Apache suexec - php in cgi mode). We have to lock them to safe place: their home dir. Now this option is not available so we set open_basedir = ".", but this makes difficulties in case of sophisticated applications, where the application is divided into directories, and the backward opens are needed ( ex. include("../includes/lib.inc") ).