It looks like Murphy signed a two year deal for us last September according to this link"

http://www.bbc.co.uk/sport/football/37261135

Apparently Wilson signed a 2 year contract extension last August so he'll be here next season too, it looks like City regard him as the young 'keeper choice, so any you 'un will be 4th choice. Unless Warnock decides to get rid of Wilson or Murphy of course.