Connexion base de données mysql

package com.example.json;

import android.content.Context;
import android.content.Intent;
import android.os.AsyncTask;
import android.widget.Toast;
 
import org.json.JSONException;
import org.json.JSONObject;
 
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
 
public class SignupActivity extends AsyncTask<String, Void, String> {
 
    private Context context;
    String link="";
    public SignupActivity(Context context) {
        this.context = context;
    }
 
    protected void onPreExecute() {
 
    }
 
    @Override
    protected String doInBackground(String... arg0) {
        String userName = arg0[0];
        String passWord = arg0[1];
       
        String data;
        BufferedReader bufferedReader;
        String result;
 
        try {
            data = "?nom=" + URLEncoder.encode(userName, "UTF-8");
            data += "&mp=" + URLEncoder.encode(passWord, "UTF-8");
 
            link = "http://41.230.219.96/data.php" + data;
            
            URL url = new URL(link);
            HttpURLConnection con = (HttpURLConnection) url.openConnection();
 
            bufferedReader = new BufferedReader(new InputStreamReader(con.getInputStream()));
            result = bufferedReader.readLine();
            return result;
        } catch (Exception e) {
            return new String("Exception: " + e.getMessage());
        }
    }
 
    @Override
    protected void onPostExecute(String result) {
    	 Toast.makeText(context, result, 100).show();
        String jsonStr = result;
        if (jsonStr != null) {
            try {
                JSONObject jsonObj = new JSONObject(jsonStr);
                String query_result = jsonObj.getString("query_result");
                if (query_result.equals("SUCCESS")) {
                    Toast.makeText(context, "Data inserted successfully. Signup successful.", 100).show();
                    
                } else if (query_result.equals("FAILURE")) {
                    Toast.makeText(context, "Data could not be inserted. Signup failed.", Toast.LENGTH_SHORT).show();
                } else {
                    Toast.makeText(context, "Couldn't connect to remote database.", Toast.LENGTH_SHORT).show();
                }
            } catch (JSONException e) {
                e.printStackTrace();
                Toast.makeText(context, result, 100).show();
                Toast.makeText(context, "Error parsing JSON data.", Toast.LENGTH_SHORT).show();
            }
        } else {
            Toast.makeText(context, "Couldn't get any JSON data.", Toast.LENGTH_SHORT).show();
        }
    }
}

?php
$n=$_GET['nom'];
$m=$_GET['mp'];
$con=mysql_connect('localhost','root','') or die("erreur de connexion au serveur $host");
    mysql_select_db("base");

    $result=mysql_query("SELECT * FROM account where log='".$n."' and pwd='".$m."'");
if(mysql_num_rows($result)==0) {
    echo '{"query_result":"FAILURE"}';
}
else{
    echo '{"query_result":"SUCCESS"}';
}
mysql_close($con);
?>