Что нового в PHP 8.1
https://stitcher.io/blog/new-in-php-81
stitcher.io
What's new in PHP 8.1 | stitcher.io
What's new in PHP 8.1 | stitcher.io
PHP 8.1 adds support for PHP enums, as well as readonly properties, Fibers, performance improvements, new in initializers, and more.