Spree System V1.0 - WORKING

#include <a_samp>
forward CheckForSpree();
new PKills[MAX_PLAYERS+1];
new SpreeP = -1;
new Text:NameSpree;
new Text:SpreeNumb;
stock PName(playerid)
{
    new name[MAX_PLAYER_NAME];
    GetPlayerName(playerid, name, sizeof(name));
    return name;
}
stock RemoveSpree(playerid)
{
    SpreeP = -1;
    PKills[playerid] = 0;
    new Higher=-1;
    new PHigher=-1;
    new i=0;
    while(i < MAX_PLAYERS)
    {
        if(PKills[i] > Higher)
        {
            Higher = PKills[i];
            PHigher = i;
        }
        i++;
    }
    if(Higher <= 0) SpreeP = -1;
    else
    {
        Higher = 0;
        SpreeP = PHigher;
    }
    return 1;
}
IsNumeric(const string[])
{
    new i;
    while(string[i] != '\0')
    {
        if (string[i] > '9' || string[i] < '0'){return 0;}
        i++;
    }
    return 1;
}
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;
}
public OnFilterScriptInit()
{
    NameSpree = TextDrawCreate(628.000000, 391.000000, "~b~~h~PlayerName~w~~h~ is on a spree");
    TextDrawAlignment(NameSpree, 3);
    TextDrawBackgroundColor(NameSpree, 255);
    TextDrawFont(NameSpree, 1);
    TextDrawLetterSize(NameSpree, 0.500000, 2.099999);
    TextDrawColor(NameSpree, -1);
    TextDrawSetOutline(NameSpree, 0);
    TextDrawSetProportional(NameSpree, 1);
    TextDrawSetShadow(NameSpree, 1);
    SpreeNumb = TextDrawCreate(627.000000, 411.000000, "~r~~h~Number of Kills~w~~h~ in a row");
    TextDrawAlignment(SpreeNumb, 3);
    TextDrawBackgroundColor(SpreeNumb, 255);
    TextDrawFont(SpreeNumb, 1);
    TextDrawLetterSize(SpreeNumb, 0.519999, 2.099999);
    TextDrawColor(SpreeNumb, -1);
    TextDrawSetOutline(SpreeNumb, 0);
    TextDrawSetProportional(SpreeNumb, 1);
    TextDrawSetShadow(SpreeNumb, 1);
    SetTimer("CheckForSpree", 1000, true);
}
public OnPlayerDeath(playerid, killerid, reason)
{
    PKills[killerid]++;
    PKills[playerid] = 0;
    if(SpreeP != -1){if(PKills[killerid] > PKills[SpreeP]) SpreeP = killerid;}
    else
    {
        SpreeP = killerid;
    }
    if(playerid == SpreeP)
    {
        RemoveSpree(playerid);
    }
    return 1;
}
public OnPlayerDisconnect(playerid, reason)
{
    if(playerid == SpreeP)
    {
        RemoveSpree(playerid);
    }
}
public CheckForSpree()
{
    new FormA[128], FormB[128];
    if(SpreeP != -1)
    {
        format(FormA, sizeof(FormA), "~b~~h~%s~w~~h~ is on a spree", PName(SpreeP));
        format(FormB, sizeof(FormB), "~r~~h~%i kills~w~~h~ in a row", PKills[SpreeP]);
        TextDrawSetString(NameSpree, FormA);
        TextDrawSetString(SpreeNumb, FormB);
        TextDrawShowForAll(NameSpree);
        TextDrawShowForAll(SpreeNumb);
    }
    else
    {
        TextDrawHideForAll(NameSpree);
        TextDrawHideForAll(SpreeNumb);
    }
    return 1;
}
public OnPlayerCommandText(playerid, cmdtext[])
{
    new cmd[128], idx;
    cmd = strtok(cmdtext, idx);
    if(!strcmp(cmd, "/rmvspree", true))
    {
        if(!IsPlayerAdmin(playerid)) return 0;
        new tmp[128];
        tmp = strtok(cmdtext, idx);
        new PID = strval(tmp);
        if(!IsPlayerConnected(PID) || !IsNumeric(tmp) || !strlen(tmp)) return SendClientMessage(playerid, 0xFF0000FF, "Invalid input");
        RemoveSpree(PID);
        SendClientMessage(playerid, 0x00FF00FF, "Spree sucessfully removed!");
        SendClientMessage(PID, 0xFF00FFFF, "A Admin has removed your spree!");
        return 1;
    }
    return 0;
}