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How to Check and Upgrade the PHP Version of Your WordPress Site

How to Check and Upgrade the PHP Version of Your WordPress Site

Many small business sites in Armenia still run on PHP 7.4 or 8.0 because “it works”. The PHP2Shell news shows why that is a problem: old branches no longer get regular security releases, so when a serious flaw appears, they are the last to be protected, or never protected at all.

How to check your PHP version

  • In WordPress open Tools, then Site Health, then the Info tab, and expand the Server section. The PHP version is listed there.
  • In your hosting control panel look for “PHP version”, “PHP configuration” or “Select PHP version”.
  • Ask your hosting support, who can also tell you whether the latest security patches are applied.

Which version should you use

Use a PHP branch that still receives security fixes and that your plugins support. Today that means a current 8.x release that includes the October 2026 patches: 8.2.35, 8.3.36, 8.4.27 or 8.5.12 and newer. Check the compatibility notes of your theme and your most important plugins before choosing the newest branch, because a few older plugins lag behind.

How to upgrade safely

  • Back up files and the database.
  • Update WordPress core, the theme and all plugins first. Remove plugins you no longer use.
  • If possible, test the new PHP version on a staging copy and watch for errors in the log.
  • Switch the PHP version in the hosting panel during a quiet time for your business.
  • Open the home page, the contact form, the checkout and the admin area, and clear the cache.
  • If something breaks, switch back to the previous version and fix the incompatible plugin, then try again.

For an old site with a custom theme or abandoned plugins, an upgrade can take real developer time. It is still cheaper than recovering a hacked site.

Frequently asked questions

How often should I upgrade PHP?

Plan a review at least once a year. Each PHP branch has a support period, and when it ends you should already be on a newer one.

Can I upgrade PHP myself?

On most hosting plans, yes: it is a single setting in the control panel. The risky part is compatibility, so back up first and test the site afterwards.

My host does not offer a new PHP version. What now?

That is a warning sign. Ask support for a timeline, and if there is none, plan a move to a host that keeps PHP current.

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