在UNITY中使用xampp和php进行c#登录

<?php
$servername = "localhost";
$username = "root";
$password = "";
$dbname = "unity_login";

// 创建数据库连接
$conn = new mysqli($servername, $username, $password, $dbname);

// 检查连接是否成功
if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}

// 获取从UNITY发送的用户名和密码
$unity_username = $_POST["username"];
$unity_password = $_POST["password"];

// 查询数据库中是否存在匹配的用户名和密码
$sql = "SELECT * FROM users WHERE username = '$unity_username' AND password = '$unity_password'";
$result = $conn->query($sql);

// 返回结果给UNITY
if ($result->num_rows > 0) {
    echo "登录成功";
} else {
    echo "登录失败";
}

// 关闭数据库连接
$conn->close();
?>

using UnityEngine;
using UnityEngine.Networking;
using UnityEngine.UI;

public class LoginManager : MonoBehaviour
{
    public InputField usernameInput;
    public InputField passwordInput;
    public Text resultText;

    public void Login()
    {
        string username = usernameInput.text;
        string password = passwordInput.text;

        StartCoroutine(SendLoginRequest(username, password));
    }

    IEnumerator SendLoginRequest(string username, string password)
    {
        WWWForm form = new WWWForm();
        form.AddField("username", username);
        form.AddField("password", password);

        using (UnityWebRequest www = UnityWebRequest.Post("http://localhost/unity_login/login.php", form))
        {
            yield return www.SendWebRequest();

            if (www.result == UnityWebRequest.Result.Success)
            {
                resultText.text = www.downloadHandler.text;
            }
            else
            {
                Debug.Log("登录请求失败: " + www.error);
            }
        }
    }
}