if(isset($_POST['login_button']))
    {

        $userName = $_POST['username'];
        $userPass = $_POST['password'];

        $hashedPass = hash('whirlpool', $userPass);
        $query = "SELECT Ime FROM Igraci WHERE Ime = '$userName' AND Lozinka = '$hashedPass'";
        $stmt = mysqli_prepare($con, $query) or die(mysqli_error($con));
        mysqli_stmt_bind_param($stmt, "ss", $userName, $hashedPass);
        mysqli_stmt_execute($stmt);
        $result = mysqli_stmt_get_result($stmt);
        $row = mysqli_fetch_array($result);

        if($row)
        {
            $session = md5($userName.$hashedPass);
            mysqli_query($con, "UPDATE Igraci SET session = '$session' WHERE Ime = '$userName' AND Lozinka = '$hashedPass'");
            setcookie("username", $_POST['username'], time()+3600*24);
            setcookie("authorization","ok");
            header( "Location:welcome.php");
            exit();
        }
        else
        {
            echo '
                            <div class="transbox" position = "center">

                <center><p>Informacije koje ste uneli nisu ispravne.</p>
                <p>Ukoliko ste zaboravili vasu lozinku kliknite na Forgot Password.</p>
                </center>

                </div>
            ';


        }
    }