Home > Article > Backend Development > How to use PHP to implement WeChat code scanning login function
With the rapid development of mobile Internet, WeChat, as an important social tool, has gradually become an indispensable part of people's daily lives. In many websites and applications, the WeChat login function has become a trend, because it allows users to log in directly using their existing WeChat account, without the need to create a new account, and it also provides a more convenient and secure Login Method. This article will introduce how to use PHP to implement the WeChat code scanning login function.
1. Preparation work
Before starting to implement the WeChat code scanning login function, we need to ensure the following points:
1. Prepare a Registered WeChat official account and developer account. You need to register and authenticate on the WeChat public platform and obtain your own developer account.
2. Download and install the PHP SDK. We can install it through Composer, which requires the following packages:
2. Implementation steps
1. Create an authorization linkThe most important step in the implementation of WeChat scan code login is when the user clicks the login button When doing so, an authorization link needs to be generated. Through this link, users can open it in WeChat and agree to authorize our application to access their WeChat account information. We can use the OAuth2.0 protocol to implement user authorization. The code to generate the authorization link is as follows:$socialite = $app->make('overtrue\socialite\Factory'); $oauth = $socialite->driver('wechat')->setRedirectUrl($redirectUrl); return $oauth->redirect();Among them, $redirectUrl is the URL redirected after authorization, and $app is Symfony's ServiceContainer object. The generated URL is similar to the following:
https://open.weixin.qq.com/connect/oauth2/authorize?appid=<APPID>&redirect_uri=<REDIRECT_URI>&response_type=code&scope=snsapi_login&state=<STATE>#wechat_redirectWhere,
$socialite = $app->make('overtrue\socialite\Factory'); $oauth = $socialite->driver('wechat'); $user = $oauth->user(); $accessToken = $user->getToken()->access_token; //获取Access Token $refreshToken = $user->getToken()->refresh_token; //获取Refresh Token $openid = $user->getId(); //获取用户 OpenIDAfter using the SDK to obtain AccessToken and RefreshToken, we can use AccessToken to request basic user information in future visits, and we need to use RefreshToken to update AccessToken. 3. Request the user’s basic information Use the obtained AccessToken and OpenID, and pass them as parameters when accessing the user’s basic information. The code is as follows:
$client = $app['wechat']; $user = $client->user->get($openid);Among them, $app is the ServiceContainer object of Symfony, and $client is the instance object created through the SDK. Next, you can use the $user object to access the user's basic information, including nickname, gender, region, avatar URL, etc.
3. Summary
This article introduces how to use PHP to implement the WeChat code scanning login function. It is mainly divided into three steps: generating authorization links, obtaining authorization tokens and Request basic user information. During the implementation process, you need to pay attention to many details, such as how to obtain the AppID and AppSecret, how to configure the OAuth2.0 web page authorization domain name of the WeChat official account, how to use the SDK, etc. Through the introduction of this article, I believe that everyone has been able to master the basic implementation method of WeChat scan code login. You can add this function to your own website or application to provide a more convenient and secure login method and bring a better user experience to users. .The above is the detailed content of How to use PHP to implement WeChat code scanning login function. For more information, please follow other related articles on the PHP Chinese website!