In the Philippine Immigration, your passport must be valid for 6 months when you travel.
You can check this out with your company PRO (Mandoob).
If I understand your query correctly, I guess you are asking about the expiry at the time of your return. In that situation also you can return but make sure your RP is valid.
Even it has only few days left before its expiry po?
Yes, you can but make sure you return before its expiry.