Network phycis ? fighting game ?

[Fantasticx]

Hi , I am making a fighting game online and I want the server to host All gameplay(characters" x , y , scalex , gotoAndStop") so that the client just send buttons to the server to move himself on the server and he get back his char data.
So that the gameplay plays in one spot only.

How would I Make/do the server to do some phycis , and send it to the users in the room?
How would the code look like?
How to set up network phycis?
is there a better way?
is this the right way to make a fighting game online?