1. Sign in to your WordPress dashboard.

2. Open Tools → Site Health.

3. Select Info.

4. Expand Server to find the current PHP version.

5. Open Dashboard → Updates to see available WordPress, plugin and theme updates.

6. Check the developers’ compatibility information for the PHP version you plan to use.

7. Install the necessary updates using the controls on Dashboard → Updates.

8. Check the site after the updates, including forms and checkout if used.

9. Change PHP through your hosting control panel once the site is ready.

10. Return to Tools → Site Health → Info → Server to check the PHP version WordPress is using.

Note: For a very old installation or an update that requires a newer PHP version first, follow the developer’s upgrade sequence. Avoid changing WordPress, PHP and several plugins at the same time without testing between changes.

After the change, WordPress should report the new PHP version under Server. A successful homepage load is only the first check: try a form, sign in and test any shop or booking features too.

A plugin has no compatible update. Ask its developer whether an update is planned. You may need to replace the plugin before moving to the new PHP version.

My theme was built specifically for me. Ask its developer to check the custom code. Updating WordPress does not update a custom theme automatically.

An update fails. Resolve that failure before changing PHP. Save the error message and check the plugin or theme developer’s instructions.

How to change your PHP version in cPanel

How to update PHP on hosting without cPanel

How to check your website after a PHP update

Finish with the post-update website checks. If you cannot update yet, the options guide explains PHP Extended Support.

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