How to recover after the session expires?

If the user's inaction exceeds the session timeout configured by the server and causes the session to fail, then we can extend the session timeout to make the user's original long time less than the timeout period.

If the user has not operated for a long time and the session fails, then we find a way to generate an operation so that the user can operate every short period of time and interact with the server, so that the session will not fail.

In general, the first thing we think of is to extend the session timeout of the server by changing the configuration of the server. For example, if the user does not interact with the server within 30 minutes after logging in, the session of the current user will become invalid.

We can set a larger value (e.g. 60) to extend the session timeout, and if we change this value to 0 or a negative number, it means that the session will never expire.

However, in practical work applications, it is not very common to blindly adjust the timeout time setting of the session, and most of the ** that need to implement this function will focus on the second idea of solving the problem. For example, some **** use the method of regularly refreshing the page to prevent the session from timeout.

The session is eliminated and cannot be restored.

In this case, the connection fails when connecting to a server in the United States, please change to China, and the registration can be successful by connecting to a server in China.

Session: In computers, especially in network applications, called "session", session directly translated into Chinese is more difficult than rolling, generally translated into the time domain, in computer terminology, session refers to the time interval between an end user and the interactive system to communicate, usually refers to the time elapsed from registration into the system to cancellation and exit from the system.

How session works.

When a session is enabled for the first time, a unique identifier is stored in a local cookie, first using the sessionstart function, php loads the stored session variable from the session repository, and when executing a php script, registers the session variable by using the sessionregister function.

When the php script is executed, the undestroyed session variables will be automatically saved in the local session library under a certain path, which can be specified in the phpini file and can be loaded and used the next time you browse the web.

Session expiration means the following:

Refers to the fact that there is no action for a long time during the connection between the user's session and the server, or the connection exceeds the valid timeWhen a session expires, the session data of the user session is cleared or **. The session expiration time is generally set to 30 minutes.

In computers, especially in network applications, this is called session control. The session object stores the attributes and configuration information required for a specific user session. This way, when a user jumps between web pages in an application, the variables stored in the session object are not lost, but persist throughout the user's session.

When a user requests a web page from an application, the web server automatically creates a session object if the user does not already have a session. When a session expires or is abandoned, the server terminates the session. One of the most common uses of the session object is to store the user's preferences.

For example, if the user indicates that they don't like to view the graph, they can store that information in the session object. For more information about using session objects, see "Managing Sessions" in the "ASP Applications" section. Note: Session state is only persisted in browsers that support cookies.

There are four ways to set the expiration date of a session. You can see which place should be set for too short a time, so it expires. 1. Operating system:

Steps: Get Started - Administrative Tools - Internet Information Services (IIS) Manager - **—— Default - Right-click "Properties" - Home Directory - Configuration - Options - Enable Session State - Session Timeout (set the timeout you want here, in minutes). OK.

2. Set the expiration time of the session in the application.

In such web applications, sessions are a common means of storing user state, but since the server memory space is limited, it is necessary to set the session expiration time. How to set the expiration time of the session in is very simple, modify the configuration.

The following describes how to modify the changes, and the following settings are performed in .

This means that the session expiration time is 30 minutes. In other words, if the current user does not take action after 30 minutes, the session will automatically expire.

3. In the CS page of the session, write the following in the load event.

4、store session in state service

Take a look at what kind of settings your program uses, and change the time to the time you need.