Is Your Website Running on Outdated PHP? Why It Matters in 2026

Here's something most business owners have never been told: your website runs on a piece of behind-the-scenes software called PHP, and the version you're on quietly affects how fast and how secure your site is. Run an outdated version and you're leaving performance and security on the table — often without realising.

It sounds technical, but the takeaway is simple, and it's worth five minutes of your attention.

What Is PHP, and Why Should You Care?

PHP is a programming language that runs on the server powering your website. If you have a WordPress site, a WooCommerce shop, or most other dynamic websites, PHP is doing the work behind the scenes every time a page loads.

Like any software, PHP gets new versions. Newer versions are faster and more secure; older ones eventually stop receiving support and updates altogether. When a version reaches "end of life", it no longer gets security fixes — so any new vulnerability discovered in it simply stays open.

Why Outdated PHP Is a Real Problem

Security. This is the big one. An unsupported PHP version is a known, unpatched risk sitting under your entire site. It's one of the gaps attackers' automated bots look for. We covered the wider picture in our website security checklist — PHP is a foundational part of it.

Speed. Newer PHP versions are significantly faster. Upgrading from an old version to a current one can genuinely speed up your site with no other changes — and speed affects both your visitors and your Google ranking (see our Core Web Vitals guide).

Compatibility. Modern WordPress and plugins are built for current PHP. Recent WordPress versions are designed to run on current PHP (8.4 is the recommended version for WordPress in 2026), and staying current keeps everything working smoothly together. Fall too far behind and things start to break.

How to Know What You're Running

You usually can't tell just by looking at your site. The version is set on your hosting, and on cheap or neglected hosting it's often left on whatever it was years ago. Common signs you might be behind: an old website that's never been touched, budget hosting, or simply nobody being responsible for keeping things current.

The reassuring news is that updating PHP is usually straightforward on good hosting — though it does need checking that your site and plugins are compatible first, which is exactly the kind of thing that should be handled carefully rather than blindly switched.

This Is Really a Hosting Question

Whether your site is on a current, supported version of PHP comes down to your hosting and whether anyone is actively looking after it. On bargain-basement hosting, nobody is — which is one more reason we keep making the case that cheap hosting costs more in the end. On properly managed hosting, keeping PHP current and compatible is part of the service, handled quietly in the background.

If you don't know what version of PHP your site is on — or you suspect it's been sitting untouched for years — we're happy to check for you. Get in touch and we'll tell you where you stand and whether an update is overdue.