With PHP 8.4 set to drop in just under a week, promising even more enhancements, this post explores what to expect and whether upgrading now makes sense. Much like a major OS update on your laptop, upgrading to a new PHP version can have significant benefits—but it also comes with risks if it isn’t properly tested with your current website or app.

A Brief History of PHP

PHP has come a long way since its inception. Originally a simple set of scripts in 1994, it has become the backbone of web development for millions of websites. Major releases, such as PHP 7.0 in 2015 and PHP 8.0 in 2020, have continuously redefined what the language can do, focusing on performance, security, and developer experience.

What’s New in PHP 8.4?

1. Performance Upgrades

• Further refining the optimisations introduced in previous versions, PHP 8.4 aims to make web applications even faster and more efficient, benefiting both developers and end-users.

2. Type System Enhancements

• PHP 8.4 introduces more flexibility in the type system, making it easier to enforce type safety and reduce bugs in large-scale applications.

3. Modern Development Features

• Expect more built-in functions that simplify common web development tasks, helping developers write cleaner and more efficient code.

Should You Upgrade to PHP 8.4 Immediately?

Upgrading to PHP 8.4 can boost performance and security, but there are some key points to consider:

1. Testing and Compatibility

• Before you upgrade, test thoroughly in a staging environment. Your CMS and its extensions may need time to catch up, and rushing the process could lead to broken functionality.

2. Early Adoption Risks

• Like any major update, early adopters may encounter bugs or compatibility issues. Sometimes it’s a good idea to wait a few weeks after the release date allows time for initial problems to be identified and fixed.

3. End-of-Life Dates for Previous Versions

• Staying on outdated versions can leave your site vulnerable. Make a plan to upgrade in line with your site’s needs while keeping an eye on security patches.

Conclusion: PHP 8.4 brings exciting features and performance improvements, but if your website is mission-critical, consider waiting for broader support and stability before making the switch.


Ready to upgrade to PHP 8.3 or PHP 8.4 but not sure where to start? Our team specialises in seamless PHP upgrades and thorough compatibility testing to keep your website running smoothly and securely. Get in touch today to see how we can help!