PHP updates may seem like a behind-the-scenes detail, but they can affect your WordPress site’s security, speed, and compatibility. If your hosting company has asked you to change PHP versions, it helps to understand why before clicking anything. The good news: with a little preparation, you can make the change carefully.
First, what is PHP?
PHP, short for PHP: Hypertext Preprocessor, is programming software that runs on the web server. WordPress uses PHP to build pages, display posts, process forms, and connect with your database.
Think of WordPress as the blueprint for your site and PHP as the worker following those instructions. Your visitor requests a page, and PHP helps assemble the right content. The server then sends the finished page to the visitor’s browser.
Unlike a photo or document, PHP does its work behind the scenes. You generally won’t see it while browsing your website. But an older PHP version can affect how well the site runs.
Why do PHP versions get retired?
PHP is maintained in numbered versions, or branches. Each branch receives updates for a limited time. Those updates may fix bugs, improve performance, or address security problems.
Eventually, a branch reaches the end of its support period. The PHP project stops providing fixes for it, including security fixes. Hosting companies also need to maintain software that works with their current servers and support tools. So they retire old versions rather than maintain them indefinitely.
That doesn’t necessarily mean your website will stop working on the day support ends. It does mean the version is no longer receiving fixes from the PHP project. Your host may eventually remove it or require you to move to a supported version.
For current support dates, check the official PHP supported versions list. WordPress also publishes its server requirements, including its current PHP guidance. Requirements can change, so use those sources when planning an update.
What can happen if your site uses outdated PHP?
Security fixes stop. When a PHP branch is no longer maintained, new problems found in that branch may not receive PHP project fixes. Keeping the server software supported is an important part of maintaining a website.
Plugins and themes can fall behind. WordPress add-ons are built to work with particular software versions. Over time, plugin and theme developers may stop testing older PHP branches. That can lead to warnings, errors, or features that no longer work as expected.
Performance may suffer. Newer PHP versions can include improvements that help code run more efficiently. An older version may miss those improvements. Speed also depends on other factors, including hosting resources, site design, and plugins, so changing PHP alone isn’t a promise of a faster site.
Think of it like keeping a work computer on software that no longer receives updates. It may keep doing the job today, but it becomes harder to support and maintain.
How to check your current PHP version
You can usually check your version in the WordPress dashboard:
- Sign in to your WordPress site.
- Open Tools, then choose Site Health.
- Select the Info tab and open the Server section.
- Look for the PHP version listed there.
The wording or menu location may vary by WordPress version. Your hosting control panel may also show the version assigned to your website. If you can’t find it, ask your host. They can confirm both your current version and the supported versions available for your account.
Once you know what you’re running, compare it with the current information from PHP and WordPress. Don’t choose a version based on a guess or an old tutorial. Your site’s plugins, theme, and custom code need to support the version you select.
How to prepare for PHP updates safely
A careful update is much less stressful than a rushed one. Here’s a sensible process:
- Check your site’s components. Make a list of WordPress, your active theme, plugins, and any custom code. Check their documentation or contact their developers about compatibility with your planned PHP version.
- Update WordPress, themes, and plugins first. Install available updates on the existing PHP version, after checking what each update changes. Updated software is more likely to support current PHP versions. Remove plugins and themes you no longer use.
- Make a complete, restorable backup. Include both your website files and database. Confirm how to restore it, and keep a copy separate from the live site.
- Test on a staging copy. Staging is a private copy of your live website for testing changes. Switch the staging site to your intended PHP version first. If your host doesn’t provide staging, ask about safe testing options before changing the live site.
- Test the parts that matter. Check the homepage, several important pages, forms, login, and any booking or shopping features. Try the site on a phone, too. Review available error logs for PHP warnings or failures.
- Change the live site when you’re ready. Make a fresh backup first. Use your hosting panel to select the PHP version for the correct site or domain. Panel names and steps vary, so follow your host’s instructions.
- Check the live site again. Clear relevant caches if needed. Test key features and watch for errors after the switch. If you find a problem, contact your host or developer promptly.
If you want a more detailed walkthrough, see our earlier guide, Is Your PHP Update Breaking Your WordPress Site?
Worried an update will break your website?
That concern is understandable. Some older plugins, themes, or custom code may not work with a newer PHP version. The risk is higher when software has been abandoned or has not been tested against current versions.
You can reduce the chance of trouble by checking compatibility, testing on staging, and keeping a restorable backup. Plan the change for a quieter time, and know how to contact your hosting provider if you need help.
If staging reveals a problem, pause before changing the live site. Look for an update or replacement for the incompatible component.
A calm, planned change gives you a better chance of finding and fixing compatibility issues without surprising your visitors.
Keep the version current, and the process manageable
PHP isn’t a setting to change casually, but it shouldn’t be ignored either. Supported versions help your WordPress site stay compatible with maintained software and receive available fixes. Check your version, review your site’s components, and test before making a live change.
Not sure which version your site can use? Contact your hosting provider or web developer before switching. At The CharlesWorks Corner, we help clients with WordPress development, hosting, and ongoing website maintenance.
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