[RajatPawar]

pawn Код:

stock GetVehicleDriver(vehicleid)
{
  for(new i; i<MAX_PLAYERS; i++)
  {
    if (IsPlayerInVehicle(i, vehicleid))
    {
      if(GetPlayerState(i) == 2)
      {
            return i;
      }
    }
  }
  return -1;
}

Using this stock

pawn Код:

CMD:v(...)
{
    for(new i = 0 ; i < MAX_VEHICLES; i++)
    {
           if(GetVehicleDriver( i ) == -1) 
           {
                DestroyVehicle( i );
           }
    }
  return 1;
}

You can do the same to get passengers, I'm sure there's a stock for that