Aktualizowanie wpisów w MYSQL za pośrednictwem PHP na Androidzie

<?php

define('DB_USER', "u862287177_stach");
define('DB_PASSWORD', "password123"); 
define('DB_DATABASE', "u862287177_tests");
define('DB_SERVER', "mysql.hostinger.pl");
?>

 <?php

class DB_CONNECT {

    function __construct() {
        $this->connect();
    }

    function __destruct() {
        $this->close();
    }

    function connect() {
        require_once __DIR__ . '/db_config.php';

        $con = mysql_connect(DB_SERVER, DB_USER, DB_PASSWORD) or die(mysql_error());

        $db = mysql_select_db(DB_DATABASE) or die(mysql_error()) or die(mysql_error());

        return $con;
    }

    function close() {
        mysql_close();
    }

}

?>

<?php

$response = array();

if (isset($_POST['id']) && isset($_POST['user']) && isset($_POST['pass']) && isset($_POST['table'])) {
    
    $id = $_POST['id'];
    $user = $_POST['user'];
    $pass = $_POST['pass'];
    $table = $_POST['table'];

    require_once __DIR__ . '/db_connect.php';

    $db = new DB_CONNECT();

    $result = mysql_query("UPDATE '$table' SET user = '$user', pass = '$pass' WHERE id = '$id");

    if ($result) {
        $response["success"] = 1;
        $response["message"] = "User successfully updated.";
        
        echo json_encode($response);
    } else {
        
    }
} else {
    // required field is missing
    $response["success"] = 0;
    $response["message"] = "Required field(s) is missing";

    // echoing JSON response
    echo json_encode($response);
}
?> 

class SaveProductDetails extends AsyncTask<String, String, String> {

        @Override
private static final String url_update_product = "http://stasbar.esy.es/update_product.php";
        protected String doInBackground(String... args) {

            // getting updated data from EditTexts
            String user = etUser.getText().toString();
            String pass = etPass.getText().toString();

            Log.d("recordId + user +  pass+ TABLE_NAME",recordId+ user+pass+TABLE_NAME);
            // Building Parameters
            List<NameValuePair> params = new ArrayList<NameValuePair>();
            params.add(new BasicNameValuePair("id", recordId));
            params.add(new BasicNameValuePair("user", user));
            params.add(new BasicNameValuePair("pass", pass));
            params.add(new BasicNameValuePair("table", TABLE_NAME));

            // sending modified data through http request
            // Notice that update product url accepts POST method
            JSONObject json = jsonParser.makeHttpRequest(url_update_product,
                    "POST", params);

            // check json success tag
            try {
                int success = json.getInt(TAG_SUCCESS);

                if (success == 1) {
                    // successfully updated
                    dismiss();
                } else {
                    // failed to update product
                }
            } catch (JSONException e) {
                e.printStackTrace();
            }

            return null;
        }

public class JSONParser {

    static InputStream is = null;
    static JSONObject jObj = null;
    static String json = "";

    // constructor
    public JSONParser() {

    }

    // function get json from url
    // by making HTTP POST or GET mehtod
    public JSONObject makeHttpRequest(String url, String method,
                                      List<NameValuePair> params) {

        // Making HTTP request
        try {
            StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();

            StrictMode.setThreadPolicy(policy);

            // check for request method
            if(method == "POST"){
                // request method is POST
                // defaultHttpClient
                DefaultHttpClient httpClient = new DefaultHttpClient();
                HttpPost httpPost = new HttpPost(url);
                httpPost.setEntity(new UrlEncodedFormEntity(params));

                HttpResponse httpResponse = httpClient.execute(httpPost);
                HttpEntity httpEntity = httpResponse.getEntity();
                is = httpEntity.getContent();

            }else if(method == "GET"){
                // request method is GET
                DefaultHttpClient httpClient = new DefaultHttpClient();
                String paramString = URLEncodedUtils.format(params, "utf-8");
                url += "?" + paramString;
                HttpGet httpGet = new HttpGet(url);

                HttpResponse httpResponse = httpClient.execute(httpGet);
                HttpEntity httpEntity = httpResponse.getEntity();
                is = httpEntity.getContent();
            }

        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

        try {
            BufferedReader reader = new BufferedReader(new InputStreamReader(
                    is, "utf-8"), 8);
            StringBuilder sb = new StringBuilder();
            String line = null;
            while ((line = reader.readLine()) != null) {
                Log.d("reader.readLine()",line);
                sb.append(line + "\n");
            }
            is.close();
            json = sb.toString();
        } catch (Exception e) {
            Log.e("Buffer Error", "Error converting result " + e.toString());
        }

        // try parse the string to a JSON object
        try {
            jObj = new JSONObject(json);
        } catch (JSONException e) {
            Log.e("JSON Parser", "Error parsing data " + e.toString());
        }

        // return JSON String
        return jObj;

    }
}

 D/recordId + user +  pass+ TABLE_NAME﹕ 25 ggg 55885 tabela1
E/JSON Parser﹕ Error parsing data org.json.JSONException: End of input at character 0 of