[cuzido]

Use OnPlayerEnterVehicle.
You can stop the player from entering the vehicle if he's not doing the job like this:

PHP код:

public OnPlayerEnterVehicle(playerid, vehicleid, ispassenger)
{
    new model = GetVehicleModel(vehicleid);
    if(model == 407){
        if(Fireman[playerid] == 0){
        new Float:X,Float:Y,Float:Z;
        GetPlayerPos(playerid,X,Y,Z);
        SetPlayerPos(playerid,X,Y,Z);
        SendClientMessage(playerid, COLOR_WHITE, "You don't have the fireman job.");
        return 1;
        }
    }
    return 1;
}