MemCache caching and Session (knowledge summary)

Session failure is usually caused by the session lifetime expiration or server shutdown. The solutions: 1. Extend the lifetime of the session; 2. Use persistent storage; 3. Use cookies; 4. Update the session asynchronously; 5. Use session management middleware.

Solution to the cross-domain problem of PHPSession In the development of front-end and back-end separation, cross-domain requests have become the norm. When dealing with cross-domain issues, we usually involve the use and management of sessions. However, due to browser origin policy restrictions, sessions cannot be shared by default across domains. In order to solve this problem, we need to use some techniques and methods to achieve cross-domain sharing of sessions. 1. The most common use of cookies to share sessions across domains

In web development, we often need to use caching technology to improve website performance and response speed. Memcache is a popular caching technology that can cache any data type and supports high concurrency and high availability. This article will introduce how to use Memcache in PHP development and provide specific code examples. 1. Install Memcache To use Memcache, we first need to install the Memcache extension on the server. In CentOS operating system, you can use the following command

JavaScriptCookies Using JavaScript cookies is the most effective way to remember and track preferences, purchases, commissions and other information. Information needed for a better visitor experience or website statistics. PHPCookieCookies are text files that are stored on client computers and retained for tracking purposes. PHP transparently supports HTTP cookies. How do JavaScript cookies work? Your server sends some data to your visitor's browser in the form of a cookie. Browsers can accept cookies. If present, it will be stored on the visitor's hard drive as a plain text record. Now, when a visitor reaches another page on the site

Optimization of asynchronous communication between PHPSession across domains and AJAX With the development of the Internet, cross-domain access and asynchronous communication have become common requirements in modern web application development. This article will focus on how to use PHPSession to achieve cross-domain access, and provide some optimization methods to improve the asynchronous communication efficiency of AJAX. 1. The problem of cross-domain access In Web development, when the browser initiates an HTTP request from a web page of one domain name, and then returns the response data belonging to another domain name, it will occur.

In PHP development, using the Memcache caching system can greatly improve the efficiency of data reading and writing. Memcache is a memory-based caching system that can cache data in memory to avoid frequent reading and writing of the database. This article will introduce how to use Memcache in PHP for efficient data reading and writing operations, and provide specific code examples. 1. Install and configure Memcache First, you need to install the Memcache extension on the server. able to pass

Reasons for session failure include session timeout, session number limit, session integrity check, server restart, browser or device problems, etc. Detailed introduction: 1. Session timeout: The server sets a default timeout for the Session. When the user does not interact with the server for a period of time, the Session will automatically expire; 2. Session number limit: The server has a number of Sessions for each user. A limit is set. When the number of Sessions created by a user exceeds this limit, the latest one will overwrite the oldest one and so on.

How to use Memcache for efficient data writing and querying in PHP development? With the continuous development of Internet applications, the requirements for system performance are getting higher and higher. In PHP development, in order to improve system performance and response speed, we often use various caching technologies. One of the commonly used caching technologies is Memcache. Memcache is a high-performance distributed memory object caching system that can be used to cache database query results, page fragments, session data, etc. By storing data in memory