How to use thinkphp5 to clear session

1. The basic concept of session

What is session? Simply put, session is a server-side storage technology that can save user data on the server side. Session works as follows:

1. When a user visits a website for the first time, the server automatically assigns a unique session_id to the user and saves the session_id in the user's browser.

2. When the user performs other operations, the server will find the corresponding session based on the session_id in the browser, and then read or modify the data saved in the session.

3. When the user closes the browser, the server will destroy the user's session and the corresponding session file will also be deleted.

2. Method of clearing session

Sometimes, we need to clear session, such as user logging out, switching users, etc. There are three commonly used methods below to clear the session

1. Use the destroy method of the Session class

thinkphp5 provides a Session class that can be easily Manipulate the session. You can clear a specific session by using the destroy method.

The sample code is as follows:

use think\facade\Session;

// 清除名为 user_info 的 session
Session::destroy('user_info');

2. Use the clear method of the Session class

Use this method to clear all sessions.

The sample code is as follows:

use think\facade\Session;

//清除所有session
Session::clear();

3. Delete the session file directly

By default, thinkphp5 will save the session file In the runtime/session directory. To clear the session, we can directly delete the session file in the specified directory.

The sample code is as follows:

unlink('./runtime/session/sess_session_id');

Among them, session_id refers to the id of the session that needs to be deleted.

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