Date of birth
The centre back, who was on loan at Scunthorpe United in the first half of the campaign, joined up with the squad in the January transfer window after completing a loan move until the end of the season from AFC Bournemouth.
Cordner signed his first professional contract at the Vitality Stadium at the end of the 2016/17 season.
This will be his fourth spell out on loan from his parent club, the first being at Havant & Waterlooville in the 2018/19 season where he played 34 times and scored four goals.
Cordner followed that with another move to the National League, this time with Ebbsfleet in the first half of last season.
At Scunthorpe this season the 22-year-old made 17 appearances scoring one goal before being recalled.