PHost implements alliances in a completely different way than HOST. PHost's alliance feature predates that of HOST by about two years.

Most recent HOSTs implement two alliance levels, "ff" and "FF". "ff" allies roughly correspond to PHost's planet, combat and minefield levels, "FF" corresponds to an additional vision level.

This is a testing version.
It may be incomplete, and have more bugs (or features) than the public live version at planetscentral.com.