#include <a_samp>

new symbols[] =
{
    '[', ']'
};

new abc[] =
{
    'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O',
    'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'
};

new bool: Big;

public OnPlayerConnect(playerid)
{
    new string[128], pName[MAX_PLAYER_NAME];
    GetPlayerName(playerid, pName, MAX_PLAYER_NAME);
    if(IsPlayerNPC(playerid))
    {
        return 1;
    }
    if(strfind(pName, "_", true) == -1)
    {
        format(string, 128, ".:: %s has been kicked from this server! Reason: Change your name! FirstName_LastName ::.", pName);
        SendClientMessageToAll(0xAA3333AA, string);
        Kick(playerid);
        return 1;
        } else {
        for(new i; i <= strlen(pName); i++)
        {
            for(new j; j <= 9; j++)
            {
                if(pName[i] == j)
                {
                    format(string, 128, ".:: %s has been kicked from this server! Reason: Change your name! FirstName_LastName ::.", pName);
                    SendClientMessageToAll(0xAA3333AA, string);
                    Kick(playerid);
                    return 1;
                }
            }
            for(new j; j <= sizeof(symbols); j++)
            {
                if(pName[i] == symbols[j])
                {
                    format(string, 128, ".:: %s has been kicked from this server! Reason: Change your name! FirstName_LastName ::.", pName);
                    SendClientMessageToAll(0xAA3333AA, string);
                    Kick(playerid);
                    return 1;
                }
            }
            if(i >= 1)
            {
                if(Big == true)
                {
                    Big = false;
                    continue;
                }
                if(pName[i] == '_')
                {
                    Big = true;
                    continue;
                }
                for(new j; j <= sizeof(abc); j++)
                {
                    if(pName[i] == abc[j])
                    {
                        format(string, 128, ".:: %s has been kicked from this server! Reason: Change your name! FirstName_LastName ::.", pName);
                        SendClientMessageToAll(0xAA3333AA, string);
                        Kick(playerid);
                        return 1;
                    }
                }
            }
        }
    }
    return 1;
}