Chris Grant (he/him) January 02, 2026 A 3 minute read

Why Upgrading PHP in 2026 Is Essential for Your WordPress Website

Behind every WordPress website is PHP – the scripting language responsible for processing requests, generating pages, and powering everything from contact forms to online shops. While it’s largely invisible to visitors, PHP plays a critical role in how secure, fast, and reliable your website is.

In 2026, upgrading your PHP version is no longer optional. It’s a fundamental part of keeping your website secure, compatible, and future-ready.

“Running an outdated version of PHP exposes your site to security vulnerabilities and prevents you from benefiting from modern performance improvements.” Share on X

What Is PHP and Why It Matters

PHP (Hypertext Preprocessor) is the server-side language WordPress is built on. Every time someone visits your website, PHP code is executed on the server to retrieve content from the database and display it in the browser.

Over time, PHP versions are retired. When this happens, they stop receiving security patches and performance updates.

“Once a PHP version reaches end of life, any newly discovered security issues will remain unpatched.”

Running an unsupported PHP version is similar to running an operating system that no longer receives updates — it may still work, but it’s increasingly risky.

How to Check Your Current PHP Version

You can easily check your PHP version inside WordPress:

  • Log in to your WordPress dashboard
  • Go to Tools → Site Health
  • Select the Info tab and expand the Server section

If your site is running an older PHP version, WordPress will usually flag this as a recommended improvement.

The Benefits of Upgrading PHP in 2026

1. Stronger Security

Security remains the biggest reason to upgrade. Older PHP versions are a known target for automated attacks.

“Outdated PHP environments are one of the most common entry points for compromised WordPress websites.”

By upgrading to a supported PHP version, your site continues to receive security fixes that protect against newly discovered vulnerabilities.

2. Faster Website Performance

Each new PHP release improves how efficiently code is executed. This means:

  • Faster page load times
  • Reduced server resource usage
  • Better performance during traffic spikes

“Upgrading PHP can deliver noticeable speed improvements without changing any website content.”

A faster site improves user experience and can also support better search engine performance.

3. Improved Plugin and Theme Compatibility

Modern themes and plugins are built with newer PHP versions in mind. Running outdated PHP can lead to:

  • Plugin errors
  • Broken layouts
  • Features not working as expected

“Keeping PHP up to date ensures compatibility with current WordPress releases and actively maintained plugins.” Share on X

4. Long-Term Stability and Future-Proofing

Staying current with PHP means your website is prepared for future WordPress updates, rather than requiring rushed upgrades later.

“Websites running modern PHP versions are easier to maintain, extend, and secure over time.”

Which PHP Version Should You Be Using in 2026?

In 2026, most WordPress websites should be running PHP 8.3 or newer.

  • PHP 8.3 – Widely supported and a solid choice for most websites
  • PHP 8.4 – Improved performance and a longer support window for future updates

The right version depends on your theme, plugins, and any custom development – which is why testing before upgrading is essential.

How O’Brien Media Can Help

Upgrading PHP isn’t always a one-click job, particularly for established websites. Some plugins or custom features may need checking or adjusting.

At O’Brien Media, we handle the entire process for you:

  • Compatibility checks for themes and plugins
  • Full website backups before any changes
  • Safe testing prior to applying updates
  • Post-upgrade monitoring to ensure everything runs smoothly

If you’re on a website support package, PHP upgrades can usually be completed using your included support time. If not, we’re happy to provide a clear, no-nonsense quote.

Ready to Upgrade?

Keeping your PHP version up to date in 2026 is one of the simplest and most effective ways to protect your WordPress website, improve performance, and avoid future issues.

If you’re unsure which PHP version your site is running – or you’d like us to handle the upgrade safely for you – just get in touch with the team.

Email: [email protected]
Phone: 01793 239239