Data persistence methods in PHP
In recent years, with the development and popularization of the Internet and the increase in Web applications, data persistence has become particularly important. In traditional web applications, data is usually stored and managed using relational databases, such as MySQL, PostgreSQL, etc. However, as web application development becomes increasingly complex and diversified, problems caused by database management are becoming more and more prominent, such as:
- Database read and write speed limit formula
- Concurrency processing capability of database
- Cost and difficulty of database maintenance
Therefore, some new technologies have emerged, the most popular of which is to store data in memory Caching technologies, such as Memcached and Redis, etc. In addition, there is a technology called data persistence, which seems to be able to overcome many problems caused by database management and improve the reliability and performance of web applications to a certain extent.
Data persistence is an in-memory database technology that stores data in memory, but the data can be restored after the server is shut down or fails. The main advantages of data persistence technology are as follows:
- Reduce disk IO
- Storage and management independent of external database
- Greatly improves response Speed, especially when reading a large amount of data
Data persistence technology is generally based on binary trees or B-trees, which is called "data structure persistence". In data structure persistence, we can modify the data structure while retaining the previous state. The advantages of this technology are data history and rollback, etc., as well as data comparison between multiple versions. Of course, this technique requires additional storage space due to the historical nature of the data. Therefore, compared with basic data structures, the persistence of data structures requires richer storage space and higher storage technology.
In PHP, there is a widely used data persistence method called "PHP Poisson memory hash table". Its implementation is based on the "Poisson distribution" algorithm, which can store and retrieve data efficiently without reading or writing from the hard disk.
PHP Poisson in-memory hash table was developed in 2002 by Dr. Andi Gutmans and his colleague Zeev Suraski. It implements a fast hash table by porting the object engine from JavaScript to PHP. PHP Poisson in-memory hash table provides a very powerful caching technology, which allows to store data in memory and easily retrieve and update them without accessing the hard disk or database.
When using the PHP Poisson memory hash table, we need to set some parameters, such as the size of the hash table, load factor, expansion factor, etc. These parameters mainly affect the performance and memory utilization of hash tables. In PHP, we can use extensions such as memcache and APC to implement PHP Poisson memory hash tables and other aspects of caching technology.
In short, data persistence is a very useful technology that can significantly improve the performance and reliability of web applications. In PHP, the PHP Poisson in-memory hash table is a very popular and efficient implementation that can easily store data in memory and perform fast retrieval and update operations. If you are developing a web application and want to improve its performance and reliability, PHP Poisson in-memory hash tables are a technology well worth trying.
The above is the detailed content of Data persistence methods in PHP. For more information, please follow other related articles on the PHP Chinese website!

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics



PHP 8.4 brings several new features, security improvements, and performance improvements with healthy amounts of feature deprecations and removals. This guide explains how to install PHP 8.4 or upgrade to PHP 8.4 on Ubuntu, Debian, or their derivati

Visual Studio Code, also known as VS Code, is a free source code editor — or integrated development environment (IDE) — available for all major operating systems. With a large collection of extensions for many programming languages, VS Code can be c

If you are an experienced PHP developer, you might have the feeling that you’ve been there and done that already.You have developed a significant number of applications, debugged millions of lines of code, and tweaked a bunch of scripts to achieve op

JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,

This tutorial demonstrates how to efficiently process XML documents using PHP. XML (eXtensible Markup Language) is a versatile text-based markup language designed for both human readability and machine parsing. It's commonly used for data storage an

A string is a sequence of characters, including letters, numbers, and symbols. This tutorial will learn how to calculate the number of vowels in a given string in PHP using different methods. The vowels in English are a, e, i, o, u, and they can be uppercase or lowercase. What is a vowel? Vowels are alphabetic characters that represent a specific pronunciation. There are five vowels in English, including uppercase and lowercase: a, e, i, o, u Example 1 Input: String = "Tutorialspoint" Output: 6 explain The vowels in the string "Tutorialspoint" are u, o, i, a, o, i. There are 6 yuan in total

Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.

What are the magic methods of PHP? PHP's magic methods include: 1.\_\_construct, used to initialize objects; 2.\_\_destruct, used to clean up resources; 3.\_\_call, handle non-existent method calls; 4.\_\_get, implement dynamic attribute access; 5.\_\_set, implement dynamic attribute settings. These methods are automatically called in certain situations, improving code flexibility and efficiency.
