Safer, faster and easier to maintain: why upgrading an outdated PHP version matters
On 21 October 2026, security updates were released for two critical PHP flaws that could allow attackers to remotely run code on an affected server without logging in. The situation was serious enough that several European organizations temporarily took PHP-based websites and services offline while the necessary fixes were being installed.
Current PHP releases received fixes quickly. The bigger challenge is with websites still running older versions that have reached end of life.
PHP 8.1 and earlier no longer receive regular security updates. Some hosting providers and long-term support vendors may offer their own fixes, but staying on outdated software makes it increasingly difficult to keep a site secure and up to date.
PHP is a server-side programming language used by many websites, ecommerce platforms and content management systems. The version your site runs on therefore affects more than just the technology behind it. It can influence security, performance, compatibility and maintenance costs.
What are the benefits of moving to a supported PHP version?
1. Keep receiving security updates
The most important reason is security. Once a PHP release reaches end of life, it is no longer regularly maintained by the PHP project. This increases the risk that newly discovered issues remain unpatched.
Running outdated software does not mean your site will immediately be compromised. But if a security flaw is exploited, the impact can quickly extend beyond IT, from downtime and recovery costs to data breaches and loss of customer trust.
Keeping PHP current gives you a much stronger foundation for applying fixes when new security issues are discovered.
2. Improve performance and compatibility
Newer PHP releases can also bring improvements in performance and resource use. Depending on your setup, this can help reduce server load and improve response times.
For visitors, better performance means a smoother experience. It can also support the overall technical quality and SEO performance of your site.
Compatibility is equally important.
Content management systems, plugins and other tools are increasingly developed and tested against current PHP releases. If your setup becomes too outdated, it can start preventing you from updating other parts of the site.
Eventually, one outdated component can hold back the whole technical stack.
3. Make maintenance easier
PHP is only one part of a web solution. Your setup may also include a content management system, plugins, integrations and custom code.
Keeping PHP up to date makes it easier to keep these other components current as well.
The longer an outdated release remains in use, the more compatibility issues and technical debt can accumulate. And the more versions you skip, the more work the eventual upgrade may require.
Instead of a relatively straightforward update, you may need to adapt more code, replace incompatible components and test more dependencies.
Regular updates therefore help keep future maintenance more manageable and predictable.
4. Make security requirements easier to meet
Using supported software is often part of an organisation’s information security requirements, audits or procurement conditions.
When a site relies on software that has reached end of life, the organisation may need to assess the additional risks and introduce extra measures to manage them.
An up-to-date technical platform makes it easier to handle these requirements and explain the state of your digital environment to auditors, partners and customers.
How can you check which PHP version your site uses?
The easiest place to start is your web hosting control panel. You can usually find the PHP version under PHP settings or version management.
If you do not have access to your hosting environment, ask your development or hosting partner to check it for you. Depending on your content management system, the information may also be visible in the administration area.
If your site is running PHP 8.1 or earlier, that release has reached end of life with the PHP project. That does not necessarily mean you need a new website.
In many cases, the first step is simply to check whether your current code, content management system, plugins and integrations are compatible with a newer PHP release. Any necessary changes can then be planned based on what you find.
Where should you start?
Updating PHP usually does not mean rebuilding your website from scratch. We can help you:
- assess your site’s technical condition and security risks;
- identify what needs to change before upgrading PHP;
- update PHP and related technical dependencies;
- test the site after the upgrade to make sure everything works as expected;
- keep your web solution technically up to date going forward.
Is your website running on an outdated PHP version?
If security updates can no longer be installed or upgrading PHP feels complicated, get in touch. We’ll review the technical state of your website and help you find the right way to move to a supported PHP version.
