[Filterscript] Boost System V1.0

//============================================================================//
//                            [BoostSystem By DH240473]                       //
// Thanks To Zeex For ZCMD Include                                            //
//============================================================================//
#include <a_samp>
#include <zcmd>
//Colors
#define  Yellow            0xFFDD00AA
//New Stuff
new Float:Boost[MAX_PLAYERS];

public OnFilterScriptInit()
{
        for (new i = 0; i < MAX_PLAYERS; i++)
        {
            if (IsPlayerConnected(i) && !IsPlayerNPC(i))//Detect A Connected And Non Npc Player ! Means False
            {
                Boost[i] = 1.5;//Set The Boost Amount
            }
        }
        return 1;
}
public OnFilterScriptExit()
{
        return 1;
}

public OnPlayerConnect(playerid)
{
        Boost[playerid] = 1.5;//Set The Boost Amount
        return 1;
}

public OnPlayerKeyStateChange(playerid, newkeys, oldkeys)
{
        if (IsPlayerInAnyVehicle(playerid) && GetPlayerState(playerid) == PLAYER_STATE_DRIVER)
        {
                if (newkeys & KEY_FIRE)
                {
                    new Float:x, Float:y, Float:z;
                    GetVehicleVelocity(GetPlayerVehicleID(playerid), x, y, z);
                    if (floatabs(x) < 3 && floatabs(y) < 3 && floatabs(z) < 3)
                    {
                        SetVehicleVelocity(GetPlayerVehicleID(playerid), x * Boost[playerid], y * Boost[playerid], z * Boost[playerid]);
                    }
                    return 1;
                }
        }
        return 1;
}

CMD:ssb(playerid, params[])
{
        new strBoostMultiplier[256],idx = 0;
        new strTempString[256];
        strBoostMultiplier = strtok(params, idx);
        if (!strlen(strBoostMultiplier))
        {
                SendClientMessage(playerid, Yellow, "++ Usage: /ssb [Amount]");
                SendClientMessage(playerid, Yellow, "+  Allows You To Set The Boost Amount That Is Applied When You Press KEY FIRE");
                SendClientMessage(playerid, Yellow, "+  Accepted Boost Amount That Are Values Between 1.0 And  3.0");
                format(strTempString,sizeof(strTempString), "+  Your current Boost Amount is: %0.2f", Boost[playerid]);
                SendClientMessage(playerid, Yellow, strTempString);
                return 1;
        }
        if (!IsNumeric2(strBoostMultiplier))
        {
                SendClientMessage(playerid, Yellow, "++ Usage: /ssb [Amount]");
                SendClientMessage(playerid, Yellow, "+  Allows You To Set The Boost Amount That Is Applied When You Press KEY FIRE");
                SendClientMessage(playerid, Yellow, "+  Accepted Boost Amount That Are Values Between 1.0 And  3.0");
                format(strTempString,sizeof(strTempString), "+  Your current Boost Amount is: %0.2f", Boost[playerid]);
                SendClientMessage(playerid, Yellow, strTempString);
                return 1;
        }
        new Float:BoostMultiplier = floatstr(strBoostMultiplier);
        if (BoostMultiplier < 1.0 || BoostMultiplier > 3.0)
        {
                SendClientMessage(playerid, Yellow, "+ Sorry, you must enter a Boost Amount Between 1.0 and 3.0");
                return 1;
        }
        Boost[playerid] = BoostMultiplier;
        format(strTempString,sizeof(strTempString), "+You Set Your Boost Amount To %0.2f", Boost[playerid]);
        SendClientMessage(playerid, Yellow, strTempString);
        return 1;
}

stock strtok(const string[], &index)
{

        new length = strlen(string);
        while ((index < length) && (string[index] <= ' '))
        {
                index++;
        }
        new offset = index;
        new result[20];
        while ((index < length) && (string[index] > ' ') && ((index - offset) < (sizeof(result) - 1)))
        {
                result[index - offset] = string[index];
                index++;
        }
        result[index - offset] = EOS;
        return result;
}

IsNumeric2(const string[])
{
        new length=strlen(string);
        if (length==0) return false;
        for (new i = 0; i < length; i++)
        {
          if((string[i] > '9' || string[i] < '0' && string[i]!='-' && string[i]!='+' && string[i]!='.')
                 || (string[i]=='-' && i!=0)
                 || (string[i]=='+' && i!=0)
           ) return false;
        }
        if (length==1 && (string[0]=='-' || string[0]=='+' || string[0]=='.')) return false;
        return true;
}