The middleware approach makes it easy for software developers to implement Web APIs that manage HTTP input / output. This presentation will show how to develop a middleware web API in PHP 7 with Expressive, the Zend Framework open source project. In this context, it is also possible to make clear the huge increase in performance of PHP 7.1 and the impact on API development. And if you've always wondered what Diactoros and Stratigility are all about, you should not miss this presentation.