The forward impressed for the Ewood Park club, netting four goals and managing three assists in 27 games.
Khadra was joined at Rovers by Albion teammate Jan Paul van Hecke.
Khadra said, per The Argus: "I think our connection with the fans came because JP and I gave 100 per cent on the pitch every game, we never acted like we were only loan players who didn't care about the club. We would really care if we didn't win.
"The bond between me and the fans was great. They pushed me and gave me confidence. I knew if I tried something and it didn't come off they would still back me.
"As a team we would go out for meals together, the group was really tight. I really enjoyed it, you could speak to anyone in the dressing room, there weren't any cliques and they were like a family to me.
"We were disappointed to not finish in the play-offs but in football you need to keep going and hopefully next season they will do it. Let's hope we see each other in the Premier League one day."
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