I am a high school teacher but now I want to teach in a college or university? I cannot quit job and I cannot move from here. Any suggestions?

the problem with a Ph.D via distance learning is that it may not be seen as respectable for a university to high you.
Ph.D's typically require first hand research and require that you interact with an advisor, peers, etc.

my best bet would be on night classes. if you are willing to teach at a Junior College, you only need a Master's.