// variable declaration
$username = "";
$email    = "";
$errors = array();
$_SESSION['success'] = "";

// connect to database
$db = mysqli_connect('localhost', 'root', '', 'registration');

// REGISTER USER
if (isset($_POST['reg_user'])) {
    // receive all input values from the form
    $title = mysqli_real_escape_string($db, $_POST['title']);
    $firstname = mysqli_real_escape_string($db, $_POST['firstname']);
    $lastname = mysqli_real_escape_string($db, $_POST['lastname']);
        $code = mysqli_real_escape_string($db, $_POST['code']);
            $mobile = mysqli_real_escape_string($db, $_POST['mobile']);
    $username = mysqli_real_escape_string($db, $_POST['username']);
    $email = mysqli_real_escape_string($db, $_POST['email']);
    $password_1 = mysqli_real_escape_string($db, $_POST['password_1']);
    $password_2 = mysqli_real_escape_string($db, $_POST['password_2']);

    // form validation: ensure that the form is correctly filled
    if (empty($username)) { array_push($errors, "Username is required"); }
    if (empty($email)) { array_push($errors, "Email is required"); }
    if (empty($password_1)) { array_push($errors, "Password is required"); }

    if ($password_1 != $password_2) {
        array_push($errors, "The two passwords do not match");
    }
       $query = mysql_query("SELECT * FROM user3 WHERE email='$email'");
        if(mysql_num_rows($query) > 0 ) { //check if there is already an entry for that username
            echo "email already exists!";
        }else{ echo"login";
        }


    // register user if there are no errors in the form
    if (count($errors) == 0) {
        $password = md5($password_1);//encrypt the password before saving in the database
        $query = "INSERT INTO user3 (title,firstname,lastname,code,mobile,username, email, password)
                  VALUES('$title','$firstname','$lastname','$code','$mobile','$username', '$email', '$password')";
        mysqli_query($db, $query);

        $_SESSION['email'] = $email;
        $_SESSION['success'] = "You are now logged in";
        $_SESSION['mobile']=$mobile;
        header('location: index.php');
    }

}