How to use ThinkPHP6 to implement Alipay authorized login

With the popularity of mobile payment, Alipay has become an indispensable payment tool in many people's daily lives. For some online websites and applications, Alipay authorized login has also become a convenient and effective way for users to log in quickly. So how to use ThinkPHP6 to implement Alipay authorized login? The following will introduce it to you in detail.

1. Apply for an Alipay developer account
Before using Alipay authorization to log in, we need to apply for an Alipay developer account and create the corresponding application. The specific steps are as follows:

1.1 Visit the official website of Alipay Open Platform (https://open.alipay.com).
1.2 Register an account and conduct personal or corporate authentication.
1.3 After logging in, select "Application Center" in the left navigation bar to enter the Developer Center.
1.4 Click the "Create Application" button, fill in the application name and classification and other information, and submit it for review.
1.5 After passing the review, obtain the application's APPID and APP_PRIVATE_KEY and other information from the application details page, and save it for later use.

2. Install the ThinkPHP6 framework
Before starting to use ThinkPHP6 to implement Alipay authorized login, we need to install the ThinkPHP6 framework first. For specific installation methods, please refer to the official ThinkPHP6 documentation (https://www.kancloud.cn/thinkphp/thinkphp6_quickstart/1037498).

3. Write code to implement Alipay authorized login
Next, we can officially start writing code to implement Alipay authorized login. The specific steps are as follows:

3.1 Create a controller file AliPayAuthController.php and define an auth method to handle Alipay authorized login requests. The method code is as follows:

use thinkacadeConfig;
use thinkacadeSession;

class AliPayAuthController {
    public function auth() {
        $appID = Config::get('alipay.app_id');
        $appPrivateKey = Config::get('alipay.app_private_key');
        $aliPayPublicKey = Config::get('alipay.ali_pay_public_key');

        $aliPay = new AlipayAopClient();
        $aliPay->gatewayUrl = 'https://openapi.alipay.com/gateway.do';
        $aliPay->appId = $appID;
        $aliPay->rsaPrivateKeyFilePath = $appPrivateKey;
        $aliPay->alipayPublicKeyFilePath = $aliPayPublicKey;

        $authCode = $this->request->param('auth_code');
        $userId = '';
        $error = '';

        if (!empty($authCode)) {
            $request = new AlipaysystemOauthTokenRequest();
            $request->setGrantType("authorization_code");
            $request->setCode($authCode);

            $response = $aliPay->execute($request);
            if (!empty($response->alipay_system_oauth_token_response)) {
                $userId = $response->alipay_system_oauth_token_response->user_id;
                Session::set('alipay_user_id', $userId);

                // TODO: 处理用户登录逻辑，例如将用户ID保存到数据库中，并跳转到登录成功页面。
            } else {
                $error = '授权获取用户ID失败';
            }
        } else {
            $error = '授权码为空';
        }

        if (!empty($error)) {
            // TODO: 处理错误信息，例如显示错误页面等。
        }
    }
}

3.2 Create a configuration file named alipay.php in the application's config directory, and save the application's APPID, key and other information. For example:

return [
    'app_id' => '1234567890',
    'app_private_key' => file_get_contents('path/to/your/appPrivateKey.txt'),
    'ali_pay_public_key' => file_get_contents('path/to/your/aliPayPublicKey.txt')
];

At this point, we have completed the entire process of using ThinkPHP6 to implement Alipay authorized login. When the user clicks the Alipay authorization login button, the system will jump to the authorization page. After the user confirms the authorization, the returned authorization code will be passed as a parameter to the auth method, and will be verified and authorized through the Alipay gateway, and finally the user ID information will be obtained. We can obtain user information based on the user ID, or save the ID to the database for quick login in the future.

Using Alipay authorized login can provide users with a fast and convenient login method, and can greatly reduce the complexity of user login, bringing a better user experience to your application. I hope this article can help developers who are using the ThinkPHP6 framework to quickly implement the Alipay authorized login function.

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