I know some of the Vietnamese folks will give you a better pronunciation, but after living in Viet Nam, I can tell you it is pronounced "fuh", though that is not exact. There is a diacritical mark on the "o" that affects the pronunciation.
I used to contribute to a blog named "
Pho King."
For those of you who have never had a bowl of pho, you're in for a treat. This was my favorite haunt in the city of Hue (pronounced whey) - that's my wife in red sitting across from a former student.
That same student is now a doctoral student at UT-San Antonio. Next Tuesday, I'll drive up to San Antonio to bring him to McAllen for Thanksgiving - and I've already told Tuan we're going to get some pho before we leave SA! I love the stuff!
I've wondered about the "Pho King" idea for a long time. I don't know whether its a language problem - or an intentional attention getter.