[TheToretto]

No need to use sscanf for just one input. (nor foreach)

Код:

CMD:musicforall(playerid, params[]) 
{ 
    new Float: Pos[3];
    if(isnull(params))
        return SendClientMessage(playerid, -1, "/musicforall (url)");

    GetPlayerPos(playerid, Pos[0], Pos[1], Pos[2]); 
    for(new i; i < MAX_PLAYERS; i++)
    {
        if(IsPlayerInRangeOfPoint(i, 10.0, Pos[0], Pos[1], Pos[2]))
   	{
            PlayAudioStreamForPlayer(i, params);
	}
    }
    return 1; 
}