[Konstantinos]

You can improve it a bit by not using format for parenteses and removing one of the arrays.

pawn Код:

CMD:ip(playerid,params[])
{
    if(!IsPlayerAdmin(playerid)) return SCM(playerid, RED, "UnKnown Command! Type /help");
    new targetid;
    if(sscanf(params,"u", targetid)) return SCM(playerid, RED, "Getting ip of a player:/ip <playerid>");
    if(!IsPlayerConnected(targetid)) return SCM(playerid, RED, "Player is not connected");
    new ip[16];
    GetPlayerIp(playerid, ip,sizeof (ip));
    ShowPlayerDialog(playerid, DIALOG_MSG, DIALOG_STYLE_MSGBOX, "IP", ip, "Close", "");
    return 1;
}