Frederick Vanbrabant, developer at madewithlove and co-organiser of PHP Antwerp, explains on his blog what generics are.

So everyone is talking about this hip “new” kid on the block for PHP: Generics. The rfc is on the table and a lot of people are getting all excited about it, but you don’t fully see the excitement? Let’s explore what it’s all about!

http://frederickvanbrabant.com/2017/05/31/generics-in-php.html