使用 POST 方法处理数据到 php 的问题

Question

I'm working on an application that registers users in a database of a domain I have. I developed it using Android Studio, and I'm having some problems handling the users info to the php file using the POST method.

The main problem I have is that my app returns a success while transfering the data to the database, but when I look at it it's empty.

Here's my Java code:

package com.test.application;

import com.android.volley.Response;
import com.android.volley.toolbox.StringRequest;

import java.util.HashMap;
import java.util.Map;

public class RegisterRequest extends StringRequest {

private static final String REGISTER_REQUEST_URL="http://www.mywebsite.com/Register.php";
private Map<String,String> params;
public RegisterRequest(String user, String password, String email, Response.Listener<String> listener){
    super(Method.POST, REGISTER_REQUEST_URL, listener, null);
    params = new HashMap<>();
    params.put("name", user);
    params.put("password", password);
    params.put("useremail", email);
}

@Override
public Map<String, String> getParams() {
    return params;
}
}

and here's my PHP code that recieves the data:

<?php
    $con = mysqli_connect("bbdd.mywebsite.com", "user", "password", "database");
    
    $Username = $_POST["name"];
    $Password = $_POST["password"];
    $UserEmail = $_POST["useremail"];
    $statement = mysqli_prepare($con, "INSERT INTO AccountsInfo (Username, Password, UserEmail) VALUES (?, ?, ?)");
    mysqli_stmt_bind_param($statement, "ssis", $Username, $Password, $UserEmail);
    mysqli_stmt_execute($statement);
    
    $response = array();
    $response["success"] = true;  
    
    echo json_encode($response);
?>

Answer 1

Assuming everything else is correct, your parameter type specification in the bind call has an i (integer) that doesn't match any parameter. For 3 string parameters, you'll want to use sss :

mysqli_stmt_bind_param($statement, "sss", $Username, $Password, $UserEmail);

You should enable error reporting so that things don't just fail silently. See how to get a detailed error report when a php-mysql script fails?