[Accord]

@CmZxC - You just complicated that man.

PHP код:

public OnPlayerEnterVehicle(playerid, vehicleid, ispassenger)
{
    for(new i = 0; i < MAX_PLAYERS; i++) if(GetPlayerVehicleSeat(i) == 0 && GetPlayerVehicleID(i) == vehicleid) return false;
    return true;
}