[PawelQ]

At the top of your script:

Код HTML:

new vehiclecallsign[MAX_VEHICLES];

Command: ( you have to edit it to be used by your script )

Код HTML:

CMD:callsign(playerid, params[])
{
    new vehicleid;
    vehicleid = GetPlayerVehicleID(playerid);
	new string[32];
	if(!IsPlayerInAnyVehicle(playerid)) return SendErrorMessage(playerid, "You're not in a vehicle.");
	if (GetFactionType(playerid) != FACTION_POLICE)
		return SendErrorMessage(playerid, "You must be a police officer.");
	if (!IsACruiser(GetPlayerVehicleID(playerid)))
	    return SendErrorMessage(playerid, "You must be inside a police cruiser.");
	if(vehiclecallsign[GetPlayerVehicleID(playerid)] == 1)
	{
 		Delete3DTextLabel(vehicle3Dtext[vehicleid]);
	    vehiclecallsign[vehicleid] = 0;
	    SendClientMessage(playerid, COLOR_RED, "Callsign removed.");
	    return 1;
	}
	if(sscanf(params, "s[32]",string)) return SendErrorMessage(playerid, "You must enter a callsign.");
	if(vehiclecallsign[GetPlayerVehicleID(playerid)] == 0)
	{
		vehicle3Dtext[vehicleid] = Create3DTextLabel(string, COLOR_WHITE, 0.0, 0.0, 0.0, 10.0, 0, 1);
		Attach3DTextLabelToVehicle(vehicle3Dtext[vehicleid], vehicleid, 0.0, -2.8, 0.0);
		vehiclecallsign[vehicleid] = 1;
	}
	return 1;
}