Keeping WordPress, themes and plugins maintained reduces exposure to known faults and security issues. An update can also reveal an existing compatibility problem. Prepare a recoverable copy of the site first so that a failed change does not leave you choosing between downtime and losing recent content.
Recommended steps
- Create a current backup of both the website files and its database. Confirm the backup completed successfully and that you know how to restore it. A file-only copy will not preserve posts, settings or orders stored in the database.
- Review the release notes and compatibility information for your active theme, plugins and PHP version. Remove abandoned components after checking that no required functionality depends on them.
- Use a staging copy when your plan provides one, especially for a store, membership website or heavily customized application. Prevent that copy from sending real customer messages or accepting production payments.
- Apply changes in a controlled sequence and test after each important component. Check administrator access, public pages, forms, search and checkout instead of considering a successful update message sufficient.
- If the site fails, preserve the error details and identify the change that triggered the problem. Use your rollback procedure carefully; restoring an older database can overwrite orders or content created since the backup.
After testing, clear the relevant application cache and check the site as a logged-out visitor. Keep the backup until normal operation is confirmed. Avoid editing WordPress core files, because an update can replace those modifications.
