In some cases, PH embassy does put a 1 year re-newel stamp to extend the validity of passport.
In any case, passport validity is till the last day, which means you can even travel on the last day of validity as well. This 6 months validity clause is a rule by most embassies to issues the Visa. If you already have Visa/RP etc, you can travel any time till the last date of passport validity.