if (ISSET($_POST['username'])){
    $username = $_POST['username'];
    $password = $_POST['password'];
    $repass = $_POST['repass'];
    $email = $_POST['email'];
    $sex = $_POST['sex'];
    $lookingfor = $_POST['lookingfor'];
    $lookfor = $_POST['lookfor'];
    $day = $_POST['day'];
    $month = $_POST['month'];
    $year = $_POST['year'];
    $country = $_POST['country'];
    $zipcode = $_POST['zipcode'];
    $mobile = $_POST['mobile'];
    $birth = $day + $month + $year;
    $birthdate = $birth * 1000;
    $newuser = "INSERT INTO users (username, userpass, email, sex, lookingfor, forwhat, birthdate, country, zipcode, mobilephone)
                    VALUES ('$username', '$userpass', '$email', $sex, '$lookingfor', '$lookfor', $birthdate, '$country', $zipcode, $mobile)";
    $result = mysql_query($newuser, $conn);
        if($result){
            header('Location: index.php');
            echo "Success!";
        }else{
            echo "We got a problem!";
        }
}