Anti Advertisement System - Simple, yet effective!

// ** INCLUDES

#include <a_samp>
#include <regex>

// ** DEFINES

// *** FUNCTIONS

#define strcpy(%0,%1,%2) strcat((%0[0] = '\0', %0), %1, %2)

// ** CALLBACKS

public OnFilterScriptInit()
{
    return 1;
}

public OnFilterScriptExit()
{
    return 1;
}

public OnPlayerText(playerid, text[])
{
    if(IsAdvertisement(text))
    {
        SendClientMessage(playerid, 0xFF0000FF, "Your message is considered as an advert, please review it.");
        return 0;
    }
    return 1;
}

// ** FUNCTIONS

forward bool:IsAdvertisement(text[]);
public bool:IsAdvertisement(text[])
{
    new message[128], build, expression[] = "(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.+){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)", start, end;
    strcpy(message, text, sizeof(message));

    for(new i = 0, j = strlen(message); i < j; i ++)
    {
        switch(message[i])
        {
            case '0'..'9': continue;
            case '.': continue;
            default:
            {
                strdel(message, i, i + 1);
                strins(message, ".", i);
            }
        }
    }

    build = regex_exbuild(expression);
    regex_exmatch(message, build);
    regex_exsearch(message, build, start, end);

    if(start >= 0) return true;
    return false;
}