What's new in PHP 8
PHP 8 will be released on November 26, 2020. It's a new major version, which means that it will introduce some breaking changes, as well as lots of new features and performance improvements. PHP 8 is in very active development right now, with its first alpha expected on June 18, 2020.
Because of the breaking changes, there's a higher chance you'll need to make some changes in your code to get it running on PHP 8. If you've kept up to date with the latest releases though, the upgrade shouldn't be too hard, since most breaking changes were deprecated before in the 7.* versions. And don't worry, all these deprecations are listed in this post.
Besides breaking changes, PHP 8 also brings a nice set of new features such as the JIT compiler, union types, attributes, and more.