Normally these can be saved. But- I really hope I don't sound too contradictory, but I would toss this one as fast as possible into the garbage!
I do not like the sunken areas in those leaves. Here is my reason for saying that: In the early nineties we saw a lot of Phals which developed these awful sunken areas. It would eventually effect every leaf until the plant simply died. It was contagious to the point that it could spread to other Orchids as well ( which didn't show those symptoms) and then infect newly purchased Phals.
The growers at the time would mumble something about a Microfungus, which I thought was just a diagnosis-word thrown out there. Whatever it was, it was deadly!
Again, I would toss it and then really follow Bill's advice and read our wonderful threads on the subject, which should give you the confidence to buy yourself another pretty plant. .....hopefully one with a normal color and nice healthy leaves.....
Welcome!