In PHPArchitect Issue 7 of Volume 21 (way back in July 2022), I wrote about PSR-7: Message Interfaces, where Request and Response interfaces were defined to ensure that requests and responses were properly structured and handled. PSR-17 was created to support PSR-7 by defining interfaces for factories to create HTTP objects. The factory design pattern is an excellent way to introduce standards in components not specifically implementing PSR-7 interfaces. They will produce the request and response objects following the recommended standards, and the implementing code will not require a major refactor. PSR-7 was written before the release of PHP 7; therefore, following these recommended standards is important for security and stability. by Frank Wallen