[itsCody]

PHP код:

CMD:makeadmin(playerid, params[]) 
{ 
    if(PlayerInfo[playerid][pAdmin] < 7) 
        return SendClientMessage(playerid, COLOR_BLUE, "You don't have acces to that command."); 
    new id, string[128], level; 
    if(sscanf(params, "dd", id, level)) 
        return SendClientMessage(playerid, COLOR_RED, "SERVER: /makeadmin [ID] [LEVEL]"); 
        
    //ShowPlayerDialog(id,DIALOG_ADMINBOX,DIALOG_STYLE_MSGBOX, "You are an admin", string, "Ok", ""); 
    format(string, sizeof(string), "%s promoted you to level %i.", PlayerName(playerid), level); 
    SendClientMessage(id, COLOR_BLUE, string); 
    PlayerInfo[id][pAdmin] = level; 
    return 1; 
}
PlayerName(playerid)
{
    new name[21];
    GetPlayerName(playerid, name, sizeof(name));
    return name;
} 


As for the "Security code" it's best off to generate a random code (bout 5 characters max), and save it to their file/database and have them use it in a command in order to use any admin commands.