CMD:duel(playerid, params[])
{

        new tmp[128],
            string[128],
            idx =0,
            id,
        ;
        tmp = otherplayerids(params, idx);
        id = strval(tmp);
        if(InvitedDuel[playerid] == true) return SendClientMessage(playerid,0xF41917AA,"»»[DUEL]«« : Have you invited someone, wait Expire Invitation");
        if(UsingArena == true) return SendClientMessage(playerid,0xF41917AA,"»»[DUEL]«« : At the time the Arena is Being Used");
        if(!strlen(tmp)) return SendClientMessage(playerid,0xF41917AA,"»»[DUEL]«« : You must enter the ID of the player following the Way (/duel [playerid])");
        if(id == playerid) return SendClientMessage(playerid,0xF41917AA,"»»[DUEL]«« : You can not invite the Self");
        if(InvitedDuel[id] == true) return SendClientMessage(playerid,0xF41917AA,"»»[DUEL]«« : Currently the player is in a Duel, wait..");
        new name[MAX_PLAYER_NAME];
        GetPlayerName(playerid, name, sizeof(name));
        format(string, sizeof(string), "»»[DUEL]«« : %s This inviting you to a \n Duel Runing (Press Accept to Accept Duel)",name);
        ShowPlayerDialog(id,DIALOG_DUEL,DIALOG_STYLE_MSGBOX,"»»[DUEL]«« :",string,"Accept", "No");
        GameTextForPlayer(id,"~r~DUE~w~LO !", 2500, 3);
        InvitedDuel[id] = true;
        IdDuel[id] = playerid;
        SetTimerEx("ExpireDuel",15000,false,"ii",id,playerid);

    return 1;
}

CMD:duel(playerid, params[])
{
        new string[128]
            tmp = INVALID_PLAYER_ID;
        ;


        if(InvitedDuel[playerid] == true) return SendClientMessage(playerid,0xF41917AA,"»»[DUEL]«« : Have you invited someone, wait Expire Invitation");
        if(UsingArena == true) return SendClientMessage(playerid,0xF41917AA,"»»[DUEL]«« : At the time the Arena is Being Used");

        if(sscanf(params, "u", tmp)) return SendClientMessage(playerid, 0xF41917AA, "/duel <playerid/name>");

        if(tmp == INVALID_PLAYER_ID) return SendClientMessage(playerid,0xF41917AA,"»»[DUEL]«« : Invalid player!");

        if(tmp == playerid) return SendClientMessage(playerid,0xF41917AA,"»»[DUEL]«« : You can not invite the Self");

        if(InvitedDuel[tmp] == true) return SendClientMessage(playerid,0xF41917AA,"»»[DUEL]«« : Currently the player is in a Duel, wait..");
        new name[MAX_PLAYER_NAME];
        GetPlayerName(playerid, name, sizeof(name));
        format(string, sizeof(string), "»»[DUEL]«« : %s This inviting you to a \n Duel Runing (Press Accept to Accept Duel)",name);
        ShowPlayerDialog(tmp,DIALOG_DUEL,DIALOG_STYLE_MSGBOX,"»»[DUEL]«« :",string,"Accept", "No");
        GameTextForPlayer(tmp,"~r~DUE~w~LO !", 2500, 3);
        InvitedDuel[tmp] = true;
        IdDuel[tmp] = playerid;
        SetTimerEx("ExpireDuel",15000,false,"ii",tmp,playerid);

        return 1;
}