- https://medium.com/@amirawebpix/php-8-features-every-developer-should-know-79f0807f3b90
- https://zhuanlan.zhihu.com/p/613600946
- https://www.w3cschool.cn/article/41824727.html
- https://kinsta.com/blog/php-8/
- https://www.ionos.com/digitalguide/websites/web-development/php-8/
- https://www.zend.com/blog/exploring-php-8