[iggy1]

I think sscanf is easier + faster here is a version of what you want that should work.

pawn Код:

if (!strcmp("/playername", cmdtext, false, 11))
{
    new id;
    if(sscanf(params,"d",id))return SendClientMessage(playerid,0xff0000FF,"USAGE: /playername [ID]");
    {
        if(id != INVALID_PLAER_ID)
        {
            new str[128];
            format(str,128,"ID:%i Is Player Name:%s",id,PlayerName(playerid));
            SendClientMessage(playerid,0xff0000FF,str);
            return true;
        }
        else return SendClientMessage(playerid,0xff0000FF,"ERROR: player not found!");
    }
}

and at bottom of script

pawn Код:

stock PlayerName(playerid)
{
    new pname[MAX_PLAYER_NAME];
    GetPlayerName(playerid,pname,sizeof(pname));
    return pname;
}

Note you will need the sscanf include or sscanf 2.0(plugin) for this method.