The time to upgrade to PHP 8 for WordPress is here! It can bring several advantages, including improved performance, better security, and access to new features.

Here are some key reasons why you should go ahead and bite the bullet.

  1. Performance improvements: PHP 8 introduces the Just-In-Time (JIT) compiler, which can significantly improve the performance of your WordPress site. Faster load times and better resource management can lead to better user experience and potentially improved search engine rankings.
  2. Enhanced security: PHP 8 includes various security enhancements that help protect your WordPress site from potential threats. Upgrading to the latest version ensures you are benefiting from these improvements and reducing the chances of vulnerabilities being exploited.
  3. New features and syntax: PHP 8 introduces new language features, such as named arguments, attributes, and match expressions, that can make your code more readable and maintainable. These features can help you write more efficient and cleaner code for your WordPress projects.
  4. Better error handling: PHP 8 offers improved error handling and reporting, making it easier for developers to identify and fix issues in their code. This can lead to more stable and reliable WordPress websites.
  5. Ongoing support: As older versions of PHP become deprecated, they will no longer receive official support or updates, including security patches. By upgrading to PHP 8, you ensure your WordPress site remains compatible with future updates and receives necessary security fixes.
  6. Plugin and theme compatibility: WordPress plugin and theme developers are increasingly adopting the latest PHP versions to leverage the new features and improvements. By upgrading, you’ll be able to use the latest versions of these plugins and themes without compatibility issues. WordPress is no longer supporting 7.4 and you will see an error message in your dashboard!

Before upgrading to PHP 8, make sure to create a backup of your site before proceeding with the upgrade, and consider performing the update on a staging environment first.

There are quite a few potential issues, but that is not nearly as prominent as when it was first released (almost 3 years ago). Most plugin authors have caught up with the changes.

Here are some common problems you might still encounter:

  1. Incompatibility with plugins and themes: Some older plugins and themes might not be fully compatible with PHP 8, causing errors or breaking your site’s functionality. Before upgrading, check the compatibility of your plugins and themes with PHP 8 and update them to the latest versions, if necessary.
  2. Deprecated functions and features: PHP 8 deprecates or removes some functions and features that may still be in use in your existing codebase. This can lead to warnings, errors, or broken functionality when you upgrade. You’ll need to review and update your code to use the new or alternative functions provided by PHP 8.
  3. Syntax changes and new features: PHP 8 introduces new syntax and features that might cause issues if your code relies on older, now unsupported syntax. You’ll need to familiarize yourself with the changes and update your code accordingly.
  4. Increased error reporting: PHP 8 has stricter error reporting, which may expose previously unnoticed issues in your code. While this can be helpful for identifying problems, it might also cause errors or warnings to be displayed on your site. You’ll need to fix any reported issues before deploying the updated site to production.
  5. Performance impact: Although PHP 8’s Just-In-Time (JIT) compiler can improve performance, the impact might vary depending on your site’s specific use case. In some instances, you might not see a significant performance boost or even experience a slight performance decrease. Testing the performance of your site after upgrading is essential to ensure you’re benefiting from the upgrade.

To minimize potential issues when upgrading to PHP 8, consider taking the following steps:

  • Create a backup of your site before upgrading to ensure you can revert to the previous state if needed.
  • Set up a staging environment to test the upgrade process and identify any issues before applying the update to your live site.
  • Update your plugins, themes, and core WordPress files to the latest versions to ensure compatibility with PHP 8.
  • Review your custom code for deprecated functions, unsupported syntax, or other potential issues.
  • Monitor your site’s performance and error logs after the upgrade to address any new issues that may arise.


If you need a hand with it contact us for a no-cost estimate on what needs to be done! Contact us!

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