[Basicz]

Personally I would make something like this

pawn Код:

public OnPlayerSpawn( playerid )
{
    foreach (Player,i)
    {
        if ( Member[ playerid ] == Member[ i ] )
            continue;

        SetPlayerMarkerForPlayer( i, playerid, ( GetPlayerColor( playerid ) & 0xFFFFFF00 ) ); // Invisible
    } 

    gradar[ playerid ] = 1; // Radar turned off for other teams.

    return 1;
}

CMD:radar( playerid, params[ ] )
{
    if ( !gradar[ playerid ] )
    {
        gradar[ playerid ] = 1;
        
        foreach (Player, i)
        {
            if ( Member[ playerid ] == Member[ i ] )
                continue;
                
            SetPlayerMarkerForPlayer( i, playerid, ( GetPlayerColor( playerid ) & 0xFFFFFF00 ) ); // Invisible for other teams.
        }
    }
    
    else
    {
        gradar[ playerid ] = 0;
        
        foreach (Player, i)
        {
            SetPlayerMarkerForPlayer( i, playerid, GetPlayerColor( playerid ) ); // Visible for other teams.
        }
    }
    
    return 1;
}

I hope this is what you want, and sorry for pressing Submit Post accidentally.