Anti FLOOD SA:MP

#include <a_samp>

// * Settings for the anti-flood
// I recommend using these settings if you want to protect the server from flood attacks.
// If you want to deal with annoying spammers, lower the thresold a bit and set the mode to 2 (kick).
// FS Anti-Flood BY Hooliganu====================================*
#define RATE_INC (500) // The sensitivity per message, no need to modify.
#define RATE_MAX (2500) // When the flood rate reaches this value the action below will be taken

// * Action to take when the flood rate reached the thresold
// 1 - Ban
// 2 - Kick
// 3 - Give a warning (not recommended)

#define THRESOLD_ACTION 1

enum LIST_ANTIFLOOD
{
    lastCheck,
    floodRate
}

new AntiFlood_Data[MAX_PLAYERS][LIST_ANTIFLOOD];

public OnFilterScriptInit()
{
    for ( new playerid; playerid < MAX_PLAYERS; playerid++ )
    {
        if ( IsPlayerConnected( playerid ) )
            AntiFlood_InitPlayer( playerid );
    }

    return 1;
}

public OnFilterScriptExit()
{
    return 1;
}

public OnPlayerConnect( playerid )
{
    AntiFlood_InitPlayer( playerid );

    return 1;
}

public OnPlayerDisconnect( playerid )
{
    return 1;
}

public OnPlayerText( playerid, text[] )
{
    assert( AntiFlood_Check( playerid ) );

    return 1;
}

public OnPlayerCommandText( playerid, cmdtext[] )
{
    assert( AntiFlood_Check( playerid ) );
    return 0;
}

forward OnPlayerTeamPrivmsg( playerid, text[] );
public OnPlayerTeamPrivmsg( playerid, text[] )
{
    assert( AntiFlood_Check( playerid ) );

    return 1;
}

public OnPlayerDeath( playerid, killerid, reason )
{
    assert( AntiFlood_Check( playerid ) );

    return 1;
}

AntiFlood_Check( playerid, bool:inc=true )
{
    AntiFlood_Data[playerid][floodRate] += inc ? RATE_INC : 0;
    AntiFlood_Data[playerid][floodRate] = AntiFlood_Data[playerid][floodRate] - ( GetTickCount() - AntiFlood_Data[playerid][lastCheck] );
    AntiFlood_Data[playerid][lastCheck] = GetTickCount();
    AntiFlood_Data[playerid][floodRate] = AntiFlood_Data[playerid][floodRate] < 0 ? 0 : AntiFlood_Data[playerid][floodRate];

    if ( AntiFlood_Data[playerid][floodRate] >= RATE_MAX )
    {
        #if THRESOLD_ACTION == 1
            new msg[64], name[MAX_PLAYER_NAME];

            GetPlayerName( playerid, name, sizeof( name ) );

            format( msg, sizeof( msg ), ">> %s has been banned for flooding.", name );

            SendClientMessageToAll( 0xEE9911FF, msg );

            Ban( playerid );
        #elseif THRESOLD_ACTION == 2
            new msg[64], name[MAX_PLAYER_NAME];

            GetPlayerName( playerid, name, sizeof( name ) );

            format( msg, sizeof( msg ), ">> %s has been kicked for flooding.", name );

            SendClientMessageToAll( 0xEE9911FF, msg );

            Kick( playerid );
        #else
            SendClientMessage( playerid, 0xC00000FF, "Stop flooding." );
        #endif

        return false;
    }

    return true;
}

AntiFlood_InitPlayer( playerid )
{
    AntiFlood_Data[playerid][lastCheck] = GetTickCount();
    AntiFlood_Data[playerid][floodRate] = 0;
}