PHP WeChat login flow chart (implementation idea)

Foreword:

In the era of mobile Internet, WeChat has become a mainstream way for people to socialize. WeChat login has become one of the login methods for many websites, such as Taobao, JD.com, etc. The WeChat login method not only facilitates users' use of the website, but also improves the interaction and stickiness between the website and users.

This article will introduce the flow chart of PHP WeChat login and analyze the underlying principles of WeChat login in detail to help readers have a deeper understanding of WeChat login.

Text:

The underlying principle of WeChat login is implemented through the OAuth2 protocol. The core idea of ​​the OAuth2 protocol is to separate the resource owner's authentication from the client application's access authorization. This protocol can ensure that the resource owner's private data is not leaked to third parties.

The flow chart of WeChat login is as follows:

1. The user clicks the WeChat login button, and the application website redirects the user to the WeChat login interface.

2. The user enters the account password in the WeChat login interface to log in.

3. The WeChat server authenticates the user information and generates an authorization code.

4. The WeChat server returns the authorization code to the application website, which is a URL (Uniform Resource Locator). The application website exchanges this URL for access_token (access token) and openid (unique user identification).

5. The application website uses access_token and openid to request the user's personal information from the WeChat server.

6. The WeChat server returns the user’s personal information.

7. The application website uses the user’s personal information to complete the user’s registration and login.

At this point, PHP WeChat login is completed.

Flow chart analysis:

1. After the user clicks the WeChat login button, he will be redirected to the WeChat login interface. The redirection here is a method that has been integrated in the WeChat SDK (Software Development Kit ), this interface can locate the user request to the WeChat login URL address. When the user accesses this URL address, it will automatically jump to the WeChat login interface.

2. The user enters the account password in the WeChat login interface to log in. The account password here is the WeChat account password, which is the account password after being bound to WeChat. The user needs to enter the correct WeChat account password to succeed. Log in.

3. When the user enters the account password in the WeChat interface and clicks to log in, the WeChat server authenticates the user's information and generates an authorization code. The authorization code is a temporary access token that can only be used after Only within the validity period of the authorization code can the application website obtain the user's information. The validity period of the authorization code can be set in the WeChat SDK. When the user's authorization code expires, the application website needs to re-obtain the user's authorization.

4. After the WeChat server authenticates the user information, it generates an authorization code and returns it to the application website. The authorization code is a URL that the application website needs to access to obtain the access_token and openid. access_token is a unique access token, and openid is the user's unique identifier. The application website needs to obtain the user's personal information through access_token.

5. The application website uses access_token and openid to request the user's personal information from the WeChat server. The request will include parameters such as access_token and openid. The WeChat server will return the user's personal information; if the user does not authorize the application website to obtain the user's personal information, information, the WeChat server cannot return the information.

6. The WeChat server returns the user's personal information, including nickname, avatar and other information. This information can help application websites implement personalized recommendation functions.

7. The application website uses the user's personal information to complete the user's registration and login. The application website can complete the user's registration and login based on the user's openid or other information.

Summary:

PHP WeChat login is a login method based on the OAuth2 protocol, which can enable users to quickly log in to the website. Through the flow chart introduced in this article, we can better understand the implementation principle of PHP WeChat login, and provide some guiding reference for subsequent WeChat login development.

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