[dusk]

This should work. For banning check the functions BanIp and BanName.

pawn Код:

public OnPlyerConnect(playerid)
{
    if(IsPlayerNameBanned(playerid))
    {
        SendClientMessage(playerid, -1, "Your name is banned");
        Kick(playerid);
    }
    else if(IsPlayerIpBanned(playerid))
    {
        SendClientMessage(playerid, -1, "Your ip is banned");
        Kick(playerid);
    }
}

IsPlayerNameBanned(playerid)
{
    new name[ MAX_PLAYER_NAME +1 ],
        File:file = fopen("bans_name.txt", io_read),
        buffer[256];

    GetPlayerName(playerid, name, sizeof(name));
    if(file)
    {
        while(fread(file, buffer)) // this will read 1 line.
        {
            StripNewLine(buffer); // This removes the symbols \r and \n 
            if(!strcmp(buffer, name))
            {
                fclose(file);
                return true;
            }
        }
        fclose(file);
    }
    return false;
}

IsPlayerNameBanned(playerid)
{
    new ip[ 16 ],
        File:file = fopen("bans_ip.txt", io_read),
        buffer[256];

    GetPlayerIp(playerid, ip, sizeof(ip));
    if(file)
    {
        while(fread(file, buffer)) // this will read 1 line.
        {
            StripNewLine(buffer); // This removes the symbols \r and \n 
            if(!strcmp(buffer, ip))
            {
                fclose(file);
                return true;
            }
        }
        fclose(file);
    }
    return false;
}


BanIp(playerid, name[])
{
    new File:file = fopen("bans_name.txt", io_append); // io_append will create the file it does not exist
    if(file)
    {
        fwrite(file, name);
        fwrite(file, "\r\n"); // a new line 
    }
    fclose(file);
}

BanName(playerid, ip[])
{
    new File:file = fopen("bans_ip.txt", io_append); // io_append will create the file it does not exist
    if(file)
    {
        fwrite(file, ip);
        fwrite(file, "\r\n"); // a new line 
    }
    fclose(file);
}

StripNewLine(string[])
{
    new len = strlen(string); 
    if(!string[0]) 
        return; 

    if((string[len - 1] == '\n') || (string[len - 1] == '\r')) 
    { 
        string[len - 1] = 0; 
        if(string[0]==0) return ; 
        if((string[len - 2] == '\n') || (string[len - 2] == '\r')) 
            string[len - 2] = 0; 
    }
}