The real question is not if a chameleon can survive in Philippines, but can you provide the essentials to allow a chameleon to thrive?
As long as you can provide the proper housing, lighting, feed, supplements, hydration and a chameleon veterinarian, you should be able to keep one just about anywhere. If you can't do any of that, then it doesn't matter where you are, it's just going to be difficult keeping one.
One thing to keep in mind that a majority of U.S. keepers use screen cages and it's a mix with the Euro's between screen and glass for housing. I refrain from using the word aquarium because most will agree that is not the proper housing for chameleons (unless it has been heavily modified to allow ventilation). Being in Philippines with its high humidity, a modified glass cage might not be the best way to go. You will need one with good ventilation and I do recall someone else in P.I. saying screen cages are not readily available.