从任何地方使用应用程序

我正在开发简单的登录注册页在统一使用后台作为php在MySQL上。我已经做到了,但它是工作在同一个网络。我的意思是我可以在同一个wi-fi上使用它。我怎样才能使它在任何地方都能使用呢?

我使用Xampp来启动Apache和MySQL。

这是我的php代码

<?php 

    $con = mysqli_connect('localhost', 'anyname','anypassword', 'unityaccess');

    //check connection
    if(mysqli_connect_errno())
    {
        echo "1: Connection failed!"; //connection failed
        exit();
    }

    $username=$_POST["name"];
    $password=$_POST["password"];

    $namecheckquery = "SELECT username, salt, hash, score FROM players WHERE username='" . $username . "';";
    $namecheck= mysqli_query($con, $namecheckquery) or die("2: Name Check Query failed!"); //namecheckquery failed
    if(mysqli_num_rows($namecheck)!=1)
    {
        echo "5: Either no user with name or more than one";
        exit();
    }

    //get login info from uery
    $existinglogininfo = mysqli_fetch_assoc($namecheck);
    $salt=$existinglogininfo["salt"];
    $hash=$existinglogininfo["hash"];

    $loginhash=crypt($password, $salt);
    if($hash != $loginhash)
    {
        echo "6: Incorrect password";
        exit();
    }

    echo "0\t" . $existinglogininfo["score"];
 ?>

这是我的c代码

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.SceneManagement;

public class Login : MonoBehaviour
{
    public Button login;
    public InputField nameinput;
    public InputField passinput;


    public void CallLogin()
    {
        StartCoroutine(LoginPlayer());
    }
    public IEnumerator LoginPlayer()
    {
        WWWForm form = new WWWForm();
        form.AddField("name", nameinput.text);
        form.AddField("password", passinput.text);
        WWW www = new WWW("http://localhost/sqlconnect/login.php", form);
        yield return www;
    }    
}