PHP has non-nullable reference types! There are some really good write-ups by the C# team on the creation of non-nullable types and how it's implemented but my

PHP has non-nullable reference types! There are some really good write-ups by the C# team on the creation of non-nullable types and how it's implemented but my google-fu is failing me on it. It's obviously a bit a of hack involving annotations/attributes but for the end user the result is pretty seamless.