Overview
Within the WordPress Toolkit, you may get the message:
PHP version used by this site has reached End Of Life and is not supported by PHP team anymore. Using outdated PHP versions poses a security risk for your website. Update your PHP version to ensure the security of your site.
This will look something like:

PHP has a very short support period per version and they encourage upgrading frequently. Thankfully, this is quite easy with Conetix as we support multiple PHP versions and allow you to choose.
WordPress now only officially supports PHP 8.0, 8.1 8.2 as of version 6.3. We recommend the use of PHP 8.2 for modern WordPress websites.
While the core itself is compatible, there’s still significant compatibility issues with many plugins and themes. If you have paid plugins or themes, you will need to ensure you have a current license so that the plugin and theme is up-to-date.