I am a native speaker of Italian, and since the equivalent word in Italian is fantasia, I write fantasy.
A friend of mine told me that phantasy is also an English word. Considering that generally, when in Italian a word uses an f followed by an a, the equivalent English word uses pha, I am confused about the correct spelling.
What is the correct spelling between phantasy, and fantasy? Is it correct to say that phantasy is an English word currently used?