The veteran goalkeeper, 37, wants to finish his career as a first-team regular and not as a substitute.
Harper told the Sunday Sun: â€œTime is running out and Iâ€™m not getting younger. If itâ€™s the same situation next year, Iâ€™d look to go on loan somewhere as you canâ€™t get these games back.
â€œMy plans are to go back on July 5 as fit as possible. Iâ€™ve been training hard in the two weeks weâ€™ve been off, training three times a week, because pre-season gets harder as you get older.
â€œIâ€™ll go back as fit as possible and see what happens at the start of the season.