What are the commonly used extensions in php

Commonly used extensions for php include MySQL extension, SQLite extension, GD library, cURL extension, JSON extension, OpenSSL extension, Memcache extension, Redis extension, APCu extension and Xdebug extension. 1. MySQL extension, which allows developers to use PHP code to perform SQL queries, inserts, updates and delete operations; 2. SQLite extension, which is a lightweight embedded database suitable for small projects or personal use; 3. GD library , provides a series of functions to create, edit, etc.

The operating environment of this tutorial: windows10 system, php8.1.3 version, DELL G3 computer.

PHP is a scripting language widely used in Web development and has strong scalability. In PHP development, it is very common to use extensions to enhance functionality and improve performance. The following will introduce some commonly used extensions in PHP and explain their functions.

1. MySQL extension

MySQL extension provides PHP with the ability to connect and operate the MySQL database. It allows developers to perform SQL queries, inserts, updates, and delete operations using PHP code.

2. SQLite extension

SQLite extension allows PHP to interact with SQLite database. SQLite is a lightweight embedded database suitable for small projects or personal use.

3. GD library

The GD library is an extension for processing images. It provides a series of functions to create, edit and output images. Through the GD library, developers can generate verification codes, zoom, crop and merge images, etc.

4. cURL extension

cURL extension provides a set of functions for data transfer through URLs. It supports various protocols such as HTTP, FTP, and SMTP and can be used to access web services, download files, etc.

5. JSON extension

JSON extension provides a series of functions for processing data in JSON format. It allows developers to exchange data between PHP and other applications and can also encode data into JSON format or decode JSON into PHP arrays.

6. OpenSSL extension

OpenSSL extension provides the ability to interact with the OpenSSL library, which is a software library for encrypted communication. Through the OpenSSL extension, PHP can implement functions such as HTTPS connections and digital certificate generation and verification.

7. Memcache (Memcached) extension

Memcache extension provides connection and operation capabilities with Memcached memory cache. With the Memcache extension, PHP can store frequently accessed data in memory to improve access speed and performance.

8. Redis extension

Redis extension is used to interact with the Redis key-value storage system. It provides a series of functions to operate the Redis database, such as setting key values, getting key values, publishing and subscribing, etc.

9. APCu extension

APCu is an extension for memory caching, which provides a caching interface for storing and retrieving data. Through the APCu extension, commonly used data can be cached in memory to improve data access speed.

10. Xdebug extension

Xdebug is a debugger extension for PHP, used to trace and debug code. It provides a range of features such as code coverage analysis, error tracking, memory usage analysis, etc.

Summary:

The above are some commonly used extensions for PHP, which provide various functions and capabilities to enable PHP to better meet the needs of developers. By selecting and using appropriate extensions, developers can improve development efficiency, optimize performance, and strengthen security .

The above is the detailed content of What are the commonly used extensions in php. For more information, please follow other related articles on the PHP Chinese website!