Question

我是新手，并且第一次尝试创建登录页面。我一直关注YouTube上的一些视频并完全复制/粘贴代码，但我得到了这个未定义的索引，说我的用户名和密码尚未定义！我在我的数据库中创建了一个测试用户，但无法登录。与服务器的连接成功，但登录页面有用户和通行证问题。

我的Login.php代码：

   <?php
require "connect.php";
$user_name =$_POST['user_name'];
$user_pass =$_POST['password'];
$mysql_qry = "select * from logintesttb where username like '$user_name' and     password '$user_pass';";
$result = mysqli_query($conn, $mysql_qry);
if(mysqli_num_rows($result) >  0){
    echo "Login was successful...!";
}
else{
    echo "Oops! There was an error";
}

?>

我的Java代码：

protected String doInBackground(String... params) {
    String type = params[0];
    String login_url = "http://My IP Address/login.php";
    if (type.equals("login")) {
        try {
            String user_name = params[1];
            String password = params[2];


            URL url = new URL(login_url);
            HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
            httpURLConnection.setRequestMethod("POST");
            httpURLConnection.setDoOutput(true);
            httpURLConnection.setDoInput(true);
            OutputStream outputStream = httpURLConnection.getOutputStream();
            BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(outputStream, "UTF-8"));
            String post_data = URLEncoder.encode("user_name", "UTF-8")+"="+URLEncoder.encode(user_name, "UTF-8")+"&"+
                    URLEncoder.encode("password", "UTF-8")+"="+URLEncoder.encode(password, "UTF-8");
            bufferedWriter.write(post_data);
            bufferedWriter.flush();
            bufferedWriter.close();
            outputStream.close();
            InputStream inputStream = httpURLConnection.getInputStream();
            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream, "iso-8859-1"));
            String result = "";
            String line = "";
            while ((line = bufferedReader.readLine()) != null) {
                result += line;
            }
            bufferedReader.close();
            inputStream.close();
            httpURLConnection.disconnect();
            return result;

        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    return null;
}

我的登录按钮的OnClickListener：

public void OnLogin(View view) {
    String username = mUsername.getText().toString();
    String password = mPassword.getText().toString();
    String type = "login";
    BackgroundWorker backgroundWorker = new BackgroundWorker (this);
    backgroundWorker.execute (type, username, password);

}

请尽可能帮助我。提前谢谢......！

PHP MySQL登录错误未定义索引

0 个答案: