Why is it that my phone will only be charge if turned off?

Why is it that my phone will only charged of turned off? I already tried to use different chargers because i thought that my charger is damage but it didnt work. And I found out that, while turning it off and the charger is still connected it works and already charge, and I try to turn it on again if its already okay but still dont work.

Why is it that while turning of my phone is the time that it will charge