This client maintains its versions synchronized with those of
VirtualBox. The approach taken by phpVirtualBox means that with
every release, it does not have to keep any code related to deprecated or modified features. Ultimately, the client developer claims
that regardless of the patch version, an instance of phpVirtualBox from a specific minor release should work with all the patch
releases under the same minor release (which is coherent with the
evolution policy of VirtualBox itself)