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Understanding PHP Versions: The Benefits and Risks of PHP Updates
Understanding PHP Versions: The Benefits and Risks of PHP Updates
Rapyd Team avatar
Written by Rapyd Team
Updated over a week ago

PHP is the backbone of many web applications, including WordPress, and understanding its versions is key to ensuring your websites are fast and secure. However, updating PHP versions comes with risk and challenges, always make sure you are aware of plugin compatibility, keep backups, and have tested in a controlled environment before updating PHP versions.

For more information on how to manage your PHP versions using the Rapyd Dashboard, read: Introduction to PHP Version Management.

What is PHP?

PHP is a server-side scripting language designed for web development. It is open-source and can be embedded into HTML, making it a popular choice for developers worldwide. PHP allows for dynamic content on your web pages, meaning it can change and interact with the user in real time. For more of an introduction into PHP programming, including common terms, read: Introduction to PHP.

Why are PHP Versions Important?

  1. Security: Each new version of PHP comes with security patches that fix known vulnerabilities of previous versions. Using an outdated version of PHP can leave your site open to security threats. Regular PHP updates keep your website secure, protecting your data and that of your users.

  2. Performance: New PHP versions usually come with improved performance. They can execute your code faster and require fewer resources, which can speed up your website and improve user experience.

  3. Features: Newer PHP versions often introduce new features and functionalities that can make coding easier and more efficient. These features can open up new possibilities for your website and web applications, enhancing their capabilities.

  4. Compatibility: As PHP continues to evolve, so do the plugins, themes, and tools built around it. Keeping your PHP version updated ensures maximum compatibility with the latest tools, themes, and plugins.

Benefits of Regular PHP Updates

  1. Increased Site Speed: Each new PHP version offers improved performance over its predecessor. By updating to the latest version, you can potentially speed up your site, providing a better user experience.

  2. Better Security: Updating your PHP version is one of the most effective ways to enhance your website's security. Each update includes patches for known vulnerabilities, reducing the risk of your site being compromised.

  3. Access to New Features: Regular updates provide access to the latest features and improvements in PHP. This can make your development process more efficient, allowing you to create more advanced and dynamic web applications.

  4. Improved SEO: Site speed and security are factors that search engines consider when ranking websites. By improving these aspects through PHP updates, you can potentially boost your site's SEO.

When to Update your PHP Version: Mitigating the Risks

When it comes to PHP updates, compatibility with plugins is a crucial consideration. At present, PHP 8.0 is considered the safest version as it is supported by a significant number of plugins. While some plugins, like BuddyBoss, are theoretically compatible with PHP 8.1 and 8.2, it is important to exercise caution due to the fact that many other plugins have not yet caught up with these newer versions.

To avoid breaking your website during a PHP update, it is recommended to take the following steps:

Research plugin compatibility

Before upgrading PHP, thoroughly investigate whether all the plugins you rely on are compatible with the targeted PHP version. Visit the plugin developers' websites or forums to check for any official statements regarding compatibility.

Test in a controlled environment

Create a testing environment that replicates your live website. Install the latest version of PHP and test all plugins and functionalities thoroughly to ensure they work as intended.

Keep backups

It is always wise to have recent backups of your website files and database. In case any issues arise during the update, you can easily revert to the previous version.

Get Support

If you are unsure about the compatibility of specific plugins or the overall update process, seek advice from the Support Team or experienced developers.

Remember, while PHP updates bring improvements and new features, it is essential to be cautious and mindful of plugin compatibility to ensure the smooth functioning of your website.

Early PHP Versions

PHP has seen many versions since its inception in 1994. Each version comes with its improvements, new features, and security patches.


Released in 1998, PHP 3 brought a new scripting engine and expanded PHP's capabilities significantly. This version saw the inclusion of support for a wider range of databases and protocols, making PHP more attractive for web development.


Released in 2000, PHP 4 improved upon PHP 3 by introducing the Zend Engine, a scripting engine that enhanced PHP's performance. It also introduced "super globals" ($_GET, $_POST, $_SESSION, etc.), which made handling input data more manageable.


PHP 5 was launched in 2004 and brought about significant improvements in terms of object-oriented programming. It also introduced the Standard PHP Library (SPL), exception handling, and improved XML and MySQL support.


Released in 2015, PHP 7 introduced a host of improvements, including significantly improved performance thanks to the new Zend Engine 3. PHP 7 also added new features like type declarations, error handling, and anonymous classes. PHP 7.x versions have had regular updates, with the latest being PHP 7.4, which introduced preloading, spread operator in arrays, and more.

PHP 8.0, 8.1, & 8.2

PHP 8.0:

Significant advancements introduced:

  • JIT (Just-In-Time) compiler, improving performance by optimizing code execution dynamically. Read: How to Enhance Performance with PHP JIT

  • Union types, allowing variables to hold multiple data types for greater coding flexibility. Read: Understanding Type Compliance in Later PHP Versions

  • Named arguments, enabling developers to pass function arguments by specifying parameter names, improving code readability and reducing errors.

  • Attributes, providing a way to add metadata and annotations to code elements, enhancing code expressiveness and facilitating advanced frameworks and libraries.

PHP 8.0 has broad plugin support, making it a safer choice for websites using third-party extensions. Research and test plugin compatibility before upgrading to a new PHP version. Consider plugin compatibility, keep backups of your website, and consult with experts for a smooth transition.

PHP 8.1:

Released on December 8, 2021, with improvements and new features including:

  • Union types, enabling variables to hold different types of data for coding flexibility.

  • Nullsafe operator, allowing method calls to be chained without issues when encountering null values.

  • Match expression, providing a concise and flexible way to handle different values in code.

  • Performance improvements, optimizing array operations and memory usage for more efficient code execution.

  • New error handling features with the "throws" keyword and "assert()" function.

  • Support for enumerations, read-only properties, 'new' in initializers, and a new callable syntax.

  • Introduction of pure intersection types, expanding on the concept of union types for more flexible type combinations.

PHP 8.2:

Released with notable improvements and enhancements:

  • Improved Type Variance, allowing better handling of different data types for more reliable and flexible code.

  • Performance optimizations, resulting in faster compilation, better memory management, and improved handling of large arrays.

  • Deprecations of certain features, such as using assert() with a string argument, list() with a single array element, create_function(), mb_ereg_replace_callback(), and specific types of callables. Take note of these deprecations when upgrading your PHP code.

Remember to always consider plugin compatibility, keep backups, and seek expert guidance for a smooth transition while maximizing the benefits of PHP update.

Updating PHP Versions with Rapyd

Our web hosting service provides an easy-to-use PHP version update tool right in your dashboard. This tool allows you to seamlessly update your PHP version, ensuring your website remains secure, fast, and compatible. For more information on how to manage your PHP versions using the Rapyd Dashboard, read: Introduction to PHP Version Management.


In conclusion, understanding PHP versions and the importance of regular updates is crucial for any developer. By keeping your PHP version up-to-date, you can enjoy a more secure, efficient, and versatile development environment. Stay on top of PHP updates and harness the full potential of this powerful scripting language for your web applications. Remember, updating PHP version comes with risk and challenges, always make sure you are aware of plugin compatibility, keep backups, and have tested in a controlled environment before updating PHP versions.

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