forward conTimeTimer();
public conTimeTimer() {
    foreach(Player, x) {
        SetPVarInt(x, \"playerTime\", GetPVarInt(x, \"playerTime\") + 1);
    }
    return 1;
}

CMD:timespent(playerid, params[]) {
    new
        szMessage[64];
    switch(GetPVarInt(playerid, \"playerTime\")) {
        case 0..59: {
            format(szMessage, sizeof(szMessage), \"You have been online for: %d seconds.\", GetPVarInt(playerid, \"playerTime\"));
        }
        case 60..3599: {
            format(szMessage, sizeof(szMessage), \"You have been online for: %d minutes.\", GetPVarInt(playerid, \"playerTime\") / 60);
        }
        case 3600..86399: {
            format(szMessage, sizeof(szMessage), \"You have been online for: %d hours.\", GetPVarInt(playerid, \"playerTime\") / 60);
        }
        case 86400..604800: {
            format(szMessage, sizeof(szMessage), \"You have been online for approximately %d days.\", GetPVarInt(playerid, \"playerTime\") / 60 / 60 / 24);
        }
    }