[DarkLored]

It is used to check if the player has the "key" for the vehicle so if someone else tries to go inside the car he won't able to because he is not the owner and he doesn't have the "key" for the vehicle. if you wanna make like slots it would be something like "PlayerInfo[playerid][pVehicle1]" "PlayerInfo[playerid][pVehicle2]" "PlayerInfo[playerid][pVehicle3]" so you have three slots, so basically if one of the slots was used you can make a code which will detect it and choose the other slot.