使用 PHP 和 MySQL 的 Unity 登录系统

在本教程中，我将展示如何使用 PHP 和 MySQL 在 Unity 中创建登录系统。

本教程需要一台带有 cPanel 以及 PHP 和 MySQLi（MySQL 的改进版本）的服务器。

请随意检查经济实惠的优质 VPS 托管或更便宜的 共享托管 替代方案。

第 1 步：设置 MySQL 数据库

  • 登录 cPanel
  • 单击“数据库”部分中的“MySQL 数据库”

  • 在 "Create New Database" 部分下输入数据库的名称，然后单击 "Create Database"

创建数据库后，我们需要创建一个与其关联的用户：

  • 在 "MySQL Users" 部分下输入用户名，然后输入密码（或者最好使用密码生成器生成强密码）。不要忘记将密码保存在某处，稍后会需要它。

最后，我们需要为数据库分配一个具有特定权限集的用户。

  • 在 "Add User To Database" 部分下选择新创建的用户和数据库，然后单击 "Add"

单击 "Add" 后，您将看到权限列表。仅选择您打算将来使用的权限。最常见的是 DELETE、SELECT、INSERT 和 UPDATE：

  • 单击 "Make Changes" 完成

第2步：创建MySQL表

MySQL表将存储用户提供的值，例如用户名、电子邮件、密码等。

  • 单击数据库部分下的 "phpMyAdmin"

  • 单击新创建的数据库，然后单击 SQL 选项卡

  • 将以下代码粘贴到查询编辑器中，然后单击 "Go"
SET SQL_MODE = "NO_AUTO_VALUE_ON_ZERO";
SET AUTOCOMMIT = 0;
START TRANSACTION;
SET time_zone = "+00:00";

--
-- Table structure for table `sc_users`
--

CREATE TABLE `sc_users` (
  `user_id` int(11) NOT NULL,
  `username` varchar(20) CHARACTER SET utf8 NOT NULL,
  `email` varchar(254) CHARACTER SET utf8 NOT NULL,
  `password` char(60) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL,
  `registration_date` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP
) ENGINE=InnoDB DEFAULT CHARSET=latin1;

--
-- Indexes for table `sc_users`
--
ALTER TABLE `sc_users`
  ADD PRIMARY KEY (`user_id`),
  ADD UNIQUE KEY `username` (`username`),
  ADD UNIQUE KEY `email` (`email`);

--
-- AUTO_INCREMENT for table `sc_users`
--
ALTER TABLE `sc_users`
  MODIFY `user_id` int(11) NOT NULL AUTO_INCREMENT, AUTO_INCREMENT=1;
COMMIT;

上面的查询将创建一个新表 'sc_users' 来存储用户数据。

第 3 步：编写服务器端逻辑

服务器端逻辑将由 PHP 脚本组成，这些脚本将接收并处理来自 Unity 的 Post 数据。

第一个文件是database.php，它将使用PHP MySQLi 扩展连接到MySQL 数据库。

数据库.php

<?php
	$host = "localhost"; // Host name 
	$db_username = "DATABASE_USER"; // Mysql username 
	$db_password = "USER_PASSWORD"; // Mysql password 
	$db_name = "DATABASE_NAME"; // Database name 

	$mysqli_conection = mysqli_connect($host, $db_username, $db_password, $db_name)or die("cannot connect"); 
?>

将 DATABASE_USER、USER_PASSWORD、 和 DATABASE_NAME 替换为您的值。

第二个文件是register.php。该文件将从 Unity 接收发布数据并将新的用户记录插入数据库表中。

注册.php

<?php
	if(isset($_POST["email"]) && isset($_POST["username"]) && isset($_POST["password1"]) && isset($_POST["password2"])){
		$errors = array();
		
		$emailMaxLength = 254;
		$usernameMaxLength = 20;
		$usernameMinLength = 3;
		$passwordMaxLength = 19;
		$passwordMinLength = 5;
		
		$email = strtolower($_POST["email"]);
		$username = $_POST["username"];
		$password1 = $_POST["password1"];
		$password2 = $_POST["password2"];
		
		//Validate email
		if(preg_match('/\s/', $email)){
			$errors[] = "Email can't have spaces";
		}else{
			if(!validate_email_address($email)){
				$errors[] = "Invalid email";
			}else{
				if(strlen($email) > $emailMaxLength){
					$errors[] = "Email is too long, must be equal or under " . strval($emailMaxLength) . " characters";
				}
			}
		}
		
		//Validate username
		if(strlen($username) > $usernameMaxLength || strlen($username) < $usernameMinLength){
			$errors[] = "Incorrect username length, must be between " . strval($usernameMinLength) . " and " . strval($usernameMaxLength) . " characters";
		}else{
			if(!ctype_alnum ($username)){
				$errors[] = "Username must be alphanumeric";
			}
		}
		
		//Validate password
		if($password1 != $password2){
			$errors[] = "Passwords do not match";
		}else{
			if(preg_match('/\s/', $password1)){
				$errors[] = "Password can't have spaces";
			}else{
				if(strlen($password1) > $passwordMaxLength || strlen($password1) < $passwordMinLength){
					$errors[] = "Incorrect password length, must be between " . strval($passwordMinLength) . " and " . strval($passwordMaxLength) . " characters";
				}else{
					if(!preg_match('/[A-Za-z]/', $password1) || !preg_match('/[0-9]/', $password1)){
						$errors[] = "Password must contain atleast 1 letter and 1 number";
					}
				}
			}
		}
		
		//Check if there is user already registered with the same email or username
		if(count($errors) == 0){
			//Connect to database
			require dirname(__FILE__) . '/database.php';
			
			if ($stmt = $mysqli_conection->prepare("SELECT username, email FROM sc_users WHERE email = ? OR username = ? LIMIT 1")) {
				
				/* bind parameters for markers */
				$stmt->bind_param('ss', $email, $username);
					
				/* execute query */
				if($stmt->execute()){
					
					/* store result */
					$stmt->store_result();

					if($stmt->num_rows > 0){
					
						/* bind result variables */
						$stmt->bind_result($username_tmp, $email_tmp);

						/* fetch value */
						$stmt->fetch();
						
						if($email_tmp == $email){
							$errors[] = "User with this email already exist.";
						}
						else if($username_tmp == $username){
							$errors[] = "User with this name already exist.";
						}
					}
					
					/* close statement */
					$stmt->close();
					
				}else{
					$errors[] = "Something went wrong, please try again.";
				}
			}else{
				$errors[] = "Something went wrong, please try again.";
			}
		}
		
		//Finalize registration
		if(count($errors) == 0){
			$hashedPassword = password_hash($password1, PASSWORD_BCRYPT);
			if ($stmt = $mysqli_conection->prepare("INSERT INTO sc_users (username, email, password) VALUES(?, ?, ?)")) {
				
				/* bind parameters for markers */
				$stmt->bind_param('sss', $username, $email, $hashedPassword);
					
				/* execute query */
				if($stmt->execute()){
					
					/* close statement */
					$stmt->close();
					
				}else{
					$errors[] = "Something went wrong, please try again.";
				}
			}else{
				$errors[] = "Something went wrong, please try again.";
			}
		}
		
		if(count($errors) > 0){
			echo $errors[0];
		}else{
			echo "Success";
		}
	}else{
		echo "Missing data";
	}
	
	function validate_email_address($email) {
		return preg_match('/^([a-z0-9!#$%&\'*+-\/=?^_`{|}~.]+@[a-z0-9.-]+\.[a-z0-9]+)$/i', $email);
	}
?>

最后一个文件是 login.php，它将接收凭据并根据 sc_users 表检查它们。

登录.php

<?php
	if(isset($_POST["email"]) && isset($_POST["password"])){
		$errors = array();
		
		$email = $_POST["email"];
		$password = $_POST["password"];
		
		//Connect to database
		require dirname(__FILE__) . '/database.php';
		
		if ($stmt = $mysqli_conection->prepare("SELECT username, email, password FROM sc_users WHERE email = ? LIMIT 1")) {
			
			/* bind parameters for markers */
			$stmt->bind_param('s', $email);
				
			/* execute query */
			if($stmt->execute()){
				
				/* store result */
				$stmt->store_result();

				if($stmt->num_rows > 0){
					/* bind result variables */
					$stmt->bind_result($username_tmp, $email_tmp, $password_hash);

					/* fetch value */
					$stmt->fetch();
					
					if(password_verify ($password, $password_hash)){
						echo "Success" . "|" . $username_tmp . "|" .  $email_tmp;
						
						return;
					}else{
						$errors[] = "Wrong email or password.";
					}
				}else{
					$errors[] = "Wrong email or password.";
				}
				
				/* close statement */
				$stmt->close();
				
			}else{
				$errors[] = "Something went wrong, please try again.";
			}
		}else{
			$errors[] = "Something went wrong, please try again.";
		}
		
		if(count($errors) > 0){
			echo $errors[0];
		}
	}else{
		echo "Missing data";
	}
?>
  • 将所有 3 个文件上传到您的 public_html 文件夹。

第 4 步：将客户端逻辑编程为 Unity

客户端逻辑将包含一个 C# 脚本，它将数据发送到 PHP 脚本。

  • 在 Unity 中创建 一个新脚本并将其命名为 SC_LoginSystem，然后将以下代码粘贴到其中：

SC_LoginSystem.cs

using System.Collections;
using UnityEngine;
using UnityEngine.Networking;

public class SC_LoginSystem : MonoBehaviour
{
    public enum CurrentWindow { Login, Register }
    public CurrentWindow currentWindow = CurrentWindow.Login;

    string loginEmail = "";
    string loginPassword = "";
    string registerEmail = "";
    string registerPassword1 = "";
    string registerPassword2 = "";
    string registerUsername = "";
    string errorMessage = "";

    bool isWorking = false;
    bool registrationCompleted = false;
    bool isLoggedIn = false;

    //Logged-in user data
    string userName = "";
    string userEmail = "";

    string rootURL = "http://YOUR_SITE.COM/"; //Path where php files are located

    void OnGUI()
    {
        if (!isLoggedIn)
        {
            if (currentWindow == CurrentWindow.Login)
            {
                GUI.Window(0, new Rect(Screen.width / 2 - 125, Screen.height / 2 - 115, 250, 230), LoginWindow, "Login");
            }
            if (currentWindow == CurrentWindow.Register)
            {
                GUI.Window(0, new Rect(Screen.width / 2 - 125, Screen.height / 2 - 165, 250, 330), RegisterWindow, "Register");
            }
        }

        GUI.Label(new Rect(5, 5, 500, 25), "Status: " + (isLoggedIn ? "Logged-in Username: " + userName + " Email: " + userEmail : "Logged-out"));
        if (isLoggedIn)
        {
            if (GUI.Button(new Rect(5, 30, 100, 25), "Log Out"))
            {
                isLoggedIn = false;
                userName = "";
                userEmail = "";
                currentWindow = CurrentWindow.Login;
            }
        }
    }

    void LoginWindow(int index)
    {
        if (isWorking)
        {
            GUI.enabled = false;
        }

        if (errorMessage != "")
        {
            GUI.color = Color.red;
            GUILayout.Label(errorMessage);
        }
        if (registrationCompleted)
        {
            GUI.color = Color.green;
            GUILayout.Label("Registration Completed!");
        }

        GUI.color = Color.white;
        GUILayout.Label("Email:");
        loginEmail = GUILayout.TextField(loginEmail);
        GUILayout.Label("Password:");
        loginPassword = GUILayout.PasswordField(loginPassword, '*');

        GUILayout.Space(5);

        if (GUILayout.Button("Submit", GUILayout.Width(85)))
        {
            StartCoroutine(LoginEnumerator());
        }

        GUILayout.FlexibleSpace();

        GUILayout.Label("Do not have account?");
        if (GUILayout.Button("Register", GUILayout.Width(125)))
        {
            ResetValues();
            currentWindow = CurrentWindow.Register;
        }
    }

    void RegisterWindow(int index)
    {
        if (isWorking)
        {
            GUI.enabled = false;
        }

        if (errorMessage != "")
        {
            GUI.color = Color.red;
            GUILayout.Label(errorMessage);
        }

        GUI.color = Color.white;
        GUILayout.Label("Email:");
        registerEmail = GUILayout.TextField(registerEmail, 254);
        GUILayout.Label("Username:");
        registerUsername = GUILayout.TextField(registerUsername, 20);
        GUILayout.Label("Password:");
        registerPassword1 = GUILayout.PasswordField(registerPassword1, '*', 19);
        GUILayout.Label("Password Again:");
        registerPassword2 = GUILayout.PasswordField(registerPassword2, '*', 19);

        GUILayout.Space(5);

        if (GUILayout.Button("Submit", GUILayout.Width(85)))
        {
            StartCoroutine(RegisterEnumerator());
        }

        GUILayout.FlexibleSpace();

        GUILayout.Label("Already have an account?");
        if (GUILayout.Button("Login", GUILayout.Width(125)))
        {
            ResetValues();
            currentWindow = CurrentWindow.Login;
        }
    }

    IEnumerator RegisterEnumerator()
    {
        isWorking = true;
        registrationCompleted = false;
        errorMessage = "";

        WWWForm form = new WWWForm();
        form.AddField("email", registerEmail);
        form.AddField("username", registerUsername);
        form.AddField("password1", registerPassword1);
        form.AddField("password2", registerPassword2);

        using (UnityWebRequest www = UnityWebRequest.Post(rootURL + "register.php", form))
        {
            yield return www.SendWebRequest();

            if (www.result != UnityWebRequest.Result.Success)
            {
                errorMessage = www.error;
            }
            else
            {
                string responseText = www.downloadHandler.text;

                if (responseText.StartsWith("Success"))
                {
                    ResetValues();
                    registrationCompleted = true;
                    currentWindow = CurrentWindow.Login;
                }
                else
                {
                    errorMessage = responseText;
                }
            }
        }

        isWorking = false;
    }

    IEnumerator LoginEnumerator()
    {
        isWorking = true;
        registrationCompleted = false;
        errorMessage = "";

        WWWForm form = new WWWForm();
        form.AddField("email", loginEmail);
        form.AddField("password", loginPassword);

        using (UnityWebRequest www = UnityWebRequest.Post(rootURL + "login.php", form))
        {
            yield return www.SendWebRequest();

            if (www.result != UnityWebRequest.Result.Success)
            {
                errorMessage = www.error;
            }
            else
            {
                string responseText = www.downloadHandler.text;

                if (responseText.StartsWith("Success"))
                {
                    string[] dataChunks = responseText.Split('|');
                    userName = dataChunks[1];
                    userEmail = dataChunks[2];
                    isLoggedIn = true;

                    ResetValues();
                }
                else
                {
                    errorMessage = responseText;
                }
            }
        }

        isWorking = false;
    }

    void ResetValues()
    {
        errorMessage = "";
        loginEmail = "";
        loginPassword = "";
        registerEmail = "";
        registerPassword1 = "";
        registerPassword2 = "";
        registerUsername = "";
    }
}

将 http://YOUR_SITE.COM/ 替换为您的值（这应该是您上传 PHP 文件的根路径）。另外，如果您的服务器安装了 SSL 证书，请确保使用 HTTPS。

  • 创建一个新的游戏对象并为其命名 "LoginSystem"
  • 将 附加到 SC_LoginSystem 到 LoginSystem 对象

按“播放”，然后单击“注册”以创建新帐户或提供登录凭据。

我们继续本教程，介绍如何创建 在线排行榜。

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