What are the commonly used modules in PHP?

Commonly used modules in php include: 1. MYSQLi extension; 2. PDO extension; 3. GD extension; 4. cURL extension; 5. JSON extension; 6. SOAP extension; 7. XML extension; 8. OpenSSL extension ; 9. ZIP extension.

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

PHP is a widely used server-side scripting language that can be used in web development to create dynamic and interactive web applications. In order to meet different development needs, PHP provides many powerful modules that can be introduced into PHP to extend its functionality. This article will introduce some commonly used PHP modules.

1. MYSQLi extension: MYSQLi is a MySQL interface extension for PHP that can be used to connect, operate and manage MySQL databases. It provides a set of functions and methods that can easily perform database queries, insert, update, and delete operations, as well as handle database transactions.

2. PDO extension: PDO (PHP Data Object) is a lightweight database abstraction layer that can interact with a variety of databases, such as MySQL, SQLite, Oracle, etc. Through PDO, developers can use a unified method to connect and operate different types of databases, thereby improving application portability and scalability.

3. GD Extension: The GD (Graphics Device) extension is a library for processing images that can be used to create, edit, and output images. It supports a variety of image formats, such as JPEG, PNG, and GIF, and provides a series of functions such as image scaling, rotation, cropping, and composition.

4. cURL extension: cURL is a library for data exchange with servers, supporting multiple protocols such as HTTP, FTP, and SMTP. The cURL extension can use the cURL library in PHP, allowing developers to send and receive data through HTTP requests, as well as perform other related operations, such as authentication and cookie management.

5. JSON extension: JSON (JavaScript Object Representation) is a lightweight data exchange format widely used in web development. PHP's JSON extension provides a set of functions that can easily parse and generate JSON data, as well as convert it to other data formats.

6. SOAP extension: SOAP (Simple Object Access Protocol) is a protocol used for communication between web services. PHP's SOAP extension provides a set of functions that can be used to create and process SOAP messages, as well as call and implement Web services.

7. XML Extensions: XML (Extensible Markup Language) is a markup language used to describe and transmit data. PHP's XML extension provides a set of functions that can be used to parse and generate XML documents, as well as process XML data.

8. OpenSSL extension: OpenSSL is an open source software library for network security that provides a range of encryption and decryption algorithms such as SSL and TLS protocols. The OpenSSL extension for PHP enables the use of the OpenSSL library in PHP for secure communication and data encryption.

9. ZIP extension: ZIP is a commonly used compression format that can compress multiple files and directories into a single archive file. PHP's ZIP extension provides a set of functions that can be used to create, read and decompress ZIP files, and process the files and directories within them.

To summarize, common PHP modules include database access extensions (such as MYSQLi and PDO), image processing extensions (such as GD), network communication extensions (such as cURL and SOAP), data format processing extensions (such as JSON and XML), security extensions (such as OpenSSL), and compression extensions (such as ZIP). These modules provide rich functionality to meet different development needs and provide more efficient, secure and reliable PHP applications.

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