In reply to Tomas M..

You don’t have to wait for an article. You have a lot of articles (and now they are quite old already) and resources about new things each specific PHP version brings; 7.0 and 7.1 are already EOL (end of life), 7.2 is soon to be EOL.

PHP 7 version is already out since 2015. There are tons of articles around the web about even what PHP 8.x will be bringing with code samples.

Available new methods of each higher version of PHP will be the same for Magento / Drupal / Laravel / Symfony / WordPress or even bare bones PHP code as these new things are available for PHP world.