clanData[clanid][property]

if (playerClanID[playerid] == -1) { // so we don't get any runtime error
    if (!strcmp("Test", clanData[playerClanID[playerid]][CLAN_NAME])) { // clan name matches to "Test"
        // do your code here
    }
}

enum E_CLAN_DATA {
    CLAN_SQLID,
    CLAN_TAG[MAX_CLAN_TAG_NAME],
    CLAN_NAME[MAX_CLAN_NAME],
    CLAN_SKIN,
    CLAN_TEAM,
    CLAN_OWNER[MAX_PLAYER_NAME],
    Float:CLAN_SPAWN_POS[4],
    CLAN_SPAWN_INTERIORID,
    CLAN_SPAWN_WORLDID,
    CLAN_VAULT_MONEY,
    CLAN_VAULT_WEAPONS[MAX_CLAN_WEAPONS],
    CLAN_VAULT_WEAPONS_TIMESTAMP[MAX_CLAN_WEAPONS],
    CLAN_TOTAL_EXP,
    CLAN_WAR_WINS,
    CLAN_WAR_TOTAL,
    Text3D:CLAN_3D_TEXT_LABEL,
    CLAN_PICKUPID
};

CMD:fcreate(playerid, params[]) {
    if (!IsPlayerAdmin(playerid))
        return SendClientMessage(playerid, COLOR_TOMATO, "Error: Only admin level 5 and above can access to this command.");

    new factionName[MAX_FACTION_NAME], factionTag[MAX_FACTION_TAG_NAME], ownerid, skin;
    if (sscanf(params, "s["#MAX_FACTION_NAME"]s["#MAX_FACTION_TAG_NAME"]rd", factionName, factionTag, ownerid, skin)) {
        SendClientMessage(playerid, COLOR_LIGHT_AQUA, "Usage: /fcreate [name] [tag] [owner] [faction skin]");
        SendClientMessage(playerid, COLOR_LIGHT_AQUA, "Usage: To add spaces in [name], you can use '_' and it will be auto detected as a white space!");
        return 1;
    }
    
    if(skin < 0 || skin > 311) return SendClientMessage(playerid, -1, "* Invalid skin ID (1-311)");

    foreach_factions(i) {
        if (!strcmp(factionData[i][FACTION_NAME], factionName, true)) {
            return SendClientMessage(playerid, COLOR_TOMATO, "Error: The faction name already exist, try another one.");
        }
        
        if (!strcmp(factionData[i][FACTION_TAG], factionTag, true)) {
            return SendClientMessage(playerid, COLOR_TOMATO, "Error: The faction tag already exist, try another one.");
        }
    }
    
    if (!IsPlayerConnected(ownerid))
        return SendClientMessage(playerid, COLOR_TOMATO, "Error: The owner player isn't connected.");

    if (playerFactionID[ownerid] != -1)
        return SendClientMessage(playerid, COLOR_TOMATO, "Error: The owner player is in a faction.");

    new index = -1;
    for (new i = 0; i < MAX_FACTIONS; i++) {
        if (factionData[i][FACTION_NAME][0] == EOS) {
            index = i;
            break;
        }
    }
    
    if (index == -1)
        return SendClientMessage(playerid, COLOR_TOMATO, "Error: Looks like the server factions creation limit has been reached, please contact server developer about this.");

    for (new i = 0; factionName[i] != EOS; i++) {
        if (factionName[i] == '_') {
            factionName[i] = ' ';
        }
    }

    new pos = strfind(factionTag, "[");
    if (pos != -1)
        strdel(factionTag, pos, pos + 1);

    pos = strfind(factionTag, "]");
    if (pos != -1)
        strdel(factionTag, pos, pos + 1);

    format(factionData[index][FACTION_TAG], MAX_FACTION_TAG_NAME, factionTag);
    format(factionData[index][FACTION_NAME], MAX_FACTION_NAME, factionName);
    factionData[index][FACTION_SKIN] = skin;
    GetPlayerName(ownerid, factionData[index][FACTION_OWNER], MAX_PLAYER_NAME);
    factionData[index][FACTION_WAR_WINS] = 0;
    factionData[index][FACTION_WAR_TOTAL] = 0;
    factionData[index][FACTION_SPAWN_POS][0] = 0.0;
    factionData[index][FACTION_SPAWN_POS][1] = 0.0;
    factionData[index][FACTION_SPAWN_POS][2] = 0.0;
    factionData[index][FACTION_SPAWN_POS][3] = 0.0;
    factionData[index][FACTION_SPAWN_INTERIORID] = 0;
    factionData[index][FACTION_SPAWN_WORLDID] = 0;
    factionData[index][FACTION_VAULT_MONEY] = 0;
    for (new i = 0; i < MAX_FACTION_WEAPONS; i++) {
        factionData[index][FACTION_VAULT_WEAPONS][i] = -1;
        factionData[index][FACTION_VAULT_WEPS_TIMESTAMP][i] = -1;
    }
    factionData[index][FACTION_TOTAL_EXP] = 0;
    factionData[index][FACTION_3D_TEXT_LABEL] = Text3D:INVALID_STREAMER_ID;
    factionData[index][FACTION_PICKUPID] = INVALID_STREAMER_ID;

    playerFactionID[ownerid] = index;
    playerFactionRank[ownerid] = FACTION_RANK_OWNER;

    new vault_weapons[32];
    for (new i = 0; i < MAX_FACTION_WEAPONS; i++) {
        format(vault_weapons, sizeof(vault_weapons), "%s-1", vault_weapons);

        if (i != (MAX_FACTION_WEAPONS - 1)) {
            strcat(vault_weapons, " ");
        }
    }
    
    new query[512];
    mysql_format(database, query, sizeof(query),
        "INSERT INTO factions (\
            tag, name, skin, exp, team, factionwar_wins, factionwar_total, \
            spawn_x, spawn_y, spawn_z, spawn_angle, spawn_interiorid, spawn_worldid, \
            vault_money, vault_weapons, vault_weapons_timestamp\
        ) VALUES (\
            '%e', '%e', %d, 0, %i, 0, 0, \
            0.0, 0.0, 0.0, 0.0, 0, 0, \
            0, '%s'\
        )",
        factionTag, factionName, skin,
        vault_weapons, vault_weapons
    );

    mysql_format(database, query, sizeof(query),
        "INSERT INTO faction_members (\
            faction_name, name, rank\
        ) VALUES (\
            '%e', '%e', %i\
        )",
        factionName, factionData[index][FACTION_OWNER], FACTION_RANK_OWNER
    );
    mysql_tquery(database, query);

    for (new i = 0; i < MAX_FACTION_RANKS; i++) {
        format(factionRankNames[index][i], MAX_FACTION_RANK_NAME, DEFAULT_FACTION_RANKS[i]);

        mysql_format(database, query, sizeof(query),
            "INSERT INTO faction_ranks (\
                faction_name, name, level\
            ) VALUES (\
                '%e', '%e', %i\
            )",
            factionName, DEFAULT_FACTION_RANKS[i], i
        );
        mysql_tquery(database, query);
    }
    
    mysql_format(database, query, sizeof(query),
        "SELECT id FROM factions WHERE faction_name = '%e'",
        factionName
    );
    new Cache:cache = mysql_query(database, query);
    cache_get_value_int(0, "id", factionData[index][FACTION_SQLID]);
    cache_delete(cache);
    
    UpdateFactionsRank();

    new string[164];
    format(string, sizeof(string), "[%s] %s", factionData[index][FACTION_TAG], factionRankNames[index][MAX_FACTION_RANKS - 1]);
    playerFaction3DTextLabel[ownerid] = CreateDynamic3DTextLabel(string, -1, 0.0, 0.0, 0.0, 25.0, ownerid, .testlos = 1);

    new name[MAX_PLAYER_NAME];
    GetPlayerName(playerid, name, sizeof(name));

    SendClientMessage(ownerid, COLOR_GREEN, "_________________________________________");
    SendClientMessage(ownerid, COLOR_GREEN, "");
    SendClientMessage(ownerid, COLOR_GREEN, "                           FACTION OWNERSHIP");
    format(string, sizeof(string), "Admin "COL_DEFAULT"%s"COL_GREEN", have assgined you as owner of new faction: "COL_DEFAULT"%s", name, factionData[index][FACTION_NAME]);
    SendClientMessage(ownerid, COLOR_GREEN, string);
    SendClientMessage(ownerid, COLOR_GREEN, "Here are some tips to get a head start with your faction:");
    SendClientMessage(ownerid, COLOR_GREEN, "To start recruiting players to your faction, use "COL_DEFAULT"/finvite");
    SendClientMessage(ownerid, COLOR_GREEN, "For list of faction commands that you have access to all of them, type "COL_DEFAULT"/fhelp");
    SendClientMessage(ownerid, COLOR_GREEN, "_________________________________________");

    format(string, sizeof(string), "Admin: You have suceessfully assigned a new faction, "COL_DEFAULT"%s "COL_BLUE"to player "COL_DEFAULT"%s", factionData[index][FACTION_NAME], factionData[index][FACTION_OWNER]);
    SendClientMessage(playerid, COLOR_BLUE, string);
    
    PlayerPlaySound(playerid, 1057, 0.0, 0.0, 0.0);
    PlayerPlaySound(ownerid, 1057, 0.0, 0.0, 0.0);

    format(string, sizeof(string), "(%s)", factionData[index][FACTION_TAG]);
    TextDrawSetString(factionAnnouncementTD[1], string);
    format(string, sizeof(string), "~w~Faction ~r~~h~%s ~w~is now recruiting new memebers. To request an invite, contact ~r~~h~%s ~w~(id: ~r~%i~w~)", factionData[index][FACTION_NAME], factionData[index][FACTION_OWNER], ownerid);
    TextDrawSetString(factionAnnouncementTD[2], string);

    foreach (new i : Player) {
        if (GetPlayerState(i) != PLAYER_STATE_WASTED || GetPlayerState(i) != PLAYER_STATE_SPECTATING) {
            for (new x = 0; x < sizeof(factionAnnouncementTD); x++) {
                TextDrawShowForPlayer(i, factionAnnouncementTD[x]);
            }
        }
    }

    factionAnnouncementTimer = SetTimer("OnAnnouncementExpire", (30 * 1000), false);
    
    format(string, sizeof(string), "[%s] %s", factionData[index][FACTION_TAG], factionRankNames[index][FACTION_RANK_OWNER]);
    playerFaction3DTextLabel[playerid] = CreateDynamic3DTextLabel(string, -1, 0.0, 0.0, 0.0, 25.0, playerid, .testlos = 1);

    format(string, sizeof(string), "~g~~h~~h~(%s) ~g~~h~%s ~w~(Rank: (%i)%s)", factionData[index][FACTION_TAG], factionData[index][FACTION_NAME], FACTION_RANK_OWNER + 1, factionRankNames[index][FACTION_RANK_OWNER]);
    PlayerTextDrawSetString(playerid, factionNamePTD[playerid], string);
    PlayerTextDrawShow(playerid, factionNamePTD[playerid]);

    return 1;
}

[18:02:45]   Loading filterscript 'clans.amx'...
[debug] Run time error 19: "File or function is not found"
[debug]  MEM_new
[debug]  MEM_delete