THE Republic of Ireland international joined the ranks of the Sky Blues on a three-year deal in July 2011.
Murphy moved to the Ricoh Arena after his contract expired at former club Scunthorpe United.
Murphy began his career at Tranmere Rovers and has also had spells at West Bromwich Albion and Walsall.
Since moving to the Sky Blues, he has been No.1 choice for the goalkeeper position despite competition from Chris Dunn and Lee Burge.
In his first two seasons at the club, Murphy has made over 100 appearances in all competitions.