if (strcmp(cmdtext, "/lock", true)==0)
    {
        if(IsPlayerInAnyVehicle(playerid))
        {
            new State=GetPlayerState(playerid);
            if(State!=PLAYER_STATE_DRIVER)
                return SendClientMessage(playerid,COLOR_GREEN,"You can only lock the doors as the driver.");

            new i;
            for(i=0;i<MAX_PLAYERS;i++)
            {
                if(i != playerid)
                    SetVehicleParamsForPlayer(GetPlayerVehicleID(playerid),i, 0, 1);
            }

            SendClientMessage(playerid, COLOR_GREEN, "Vehicle locked!");

            new Float:pX, Float:pY, Float:pZ;
            GetPlayerPos(playerid,pX,pY,pZ);

            PlayerPlaySound(playerid,1056,pX,pY,pZ);
        }
        else
            SendClientMessage(playerid, COLOR_GREEN, "You're not in a vehicle!");

        return 1;
    }

    if (strcmp(cmdtext, "/unlock", true)==0)
    {
        if(IsPlayerInAnyVehicle(playerid))
        {
            new State=GetPlayerState(playerid);
            if(State!=PLAYER_STATE_DRIVER)
                return SendClientMessage(playerid,COLOR_GREEN,"You can only unlock the doors as the driver.");

            new i;
            for(i=0;i<MAX_PLAYERS;i++)
                SetVehicleParamsForPlayer(GetPlayerVehicleID(playerid),i, 0, 0);

            SendClientMessage(playerid, COLOR_GREEN, "Vehicle unlocked!");
            new Float:pX, Float:pY, Float:pZ;
            GetPlayerPos(playerid,pX,pY,pZ);
            PlayerPlaySound(playerid,1057,pX,pY,pZ);
        }
        else
            SendClientMessage(playerid, COLOR_GREEN, "You're not in a vehicle!");

        return 1;
    }