Working with interfaces and traits

The PHP 8 trait implementation has been expanded in several ways. There are also several new interfaces that can potentially alter how you work with the DOM and DateTime extensions. For the most part, the changes improve the abilities of these two extensions. However, as method signatures have changed in some cases, you may run into a potential code break. Due to this, it's important to pay close attention to the discussion presented in this section to ensure that existing and future PHP code remains functional.

First, let's have a look at the new DOM extension interfaces.

Discovering new DOM extension interfaces

The cost of living economic statistic is issued each year by many world governments. It depicts how much it costs an average citizen to live year by year. As web technology matures, a similar principal has been applied – first to HTML, and now to DOM. The DOM Living Standard is maintained by the Web Hypertext Application...