It depends which airport you land at Harry.

NAIA 1 .... definitely has facility for extending to 59 days.

Ask at the immigration desk upon arrival. They will direct you to the nearby office where you can 'process' it. The actual fee has been reduced to p2130 now.... assuming it is charged at the same rate as other immigration offices. You will need cash.

I have not tried this myself, but I know of many people who do this.

Now when I landed at NAIA 3 (Emirates), expecting the same service, they gave me the brush-off. Perhaps wrong time of the day (very late at night).