What are the major versions of php?

The main versions of php are PHP3, PHP4, PHP5, and PHP7. Detailed introduction: 1. PHP3 introduces many important features, such as supporting multiple databases, file upload functions and cookie management. The release of PHP3 marks the beginning of PHP's emergence in the field of Web development; 2. PHP4 introduces many new features. Features and improvements, such as object-oriented programming support, exception handling, session management and XML parsing, etc., the release of PHP4 further improves the functionality and performance of PHP; 3. PHP5, etc.

The operating environment of this tutorial: Windows 10 system, PHP8.1.3 version, Dell G3 computer.

PHP is a widely used server-side scripting language for developing dynamic web pages and web applications. Since its first release in 1995, PHP has evolved and developed through several major versions. This article will introduce the major versions of PHP and their features.

1. PHP3: PHP 3 is the first major version of PHP, released in 1998. It introduces many important features, such as support for multiple databases, file upload capabilities, and cookie management. The release of PHP 3 marks the beginning of PHP's rise in the field of web development.

2. PHP4: PHP 4 was released in 2000 and is a major version update of PHP. It introduces many new features and improvements, such as object-oriented programming (OOP) support, exception handling, session management, and XML parsing. The release of PHP 4 further improved the functionality and performance of PHP, making it one of the most popular web development languages ​​at the time.

3. PHP5: PHP 5 was released in 2004 and is an important version update of PHP. It introduces many new features and improvements, such as stronger object-oriented programming support, namespaces, improvements in exception handling, and better performance. The release of PHP 5 makes PHP more reliable and powerful in enterprise application development.

4. PHP7: PHP 7 was released in 2015 and is the latest major version of PHP. It brings many important improvements and performance gains, such as faster execution, lower memory consumption, and better error handling. PHP 7 also introduces some new features, such as scalar type declaration and return type declaration, making the code clearer and more readable.

In addition to these major versions, PHP also has some minor versions and revisions, such as PHP 4.4, PHP 5.3, PHP 5.6, etc. These releases are usually some bug fixes and security updates to the major release.

To sum up, the main versions of PHP include PHP 3, PHP 4, PHP 5 and PHP 7. Each version brings many new features and improvements, making PHP a powerful and popular web development language. Both beginners and experienced developers can choose the right PHP version to develop their web applications based on their needs.

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