Book Image

PHP 7 Programming Cookbook

By : Doug Bierer
Book Image

PHP 7 Programming Cookbook

By: Doug Bierer

Overview of this book

PHP 7 comes with a myriad of new features and great tools to optimize your code and make your code perform faster than in previous versions. Most importantly, it allows you to maintain high traffic on your websites with low-cost hardware and servers through a multithreading web server. This book demonstrates intermediate to advanced PHP techniques with a focus on PHP 7. Each recipe is designed to solve practical, real-world problems faced by PHP developers like yourself every day. We also cover new ways of writing PHP code made possible only in version 7. In addition, we discuss backward-compatibility breaks and give you plenty of guidance on when and where PHP 5 code needs to be changed to produce the correct results when running under PHP 7. This book also incorporates the latest PHP 7.x features. By the end of the book, you will be equipped with the tools and skills required to deliver efficient applications for your websites and enterprises.
Table of Contents (22 chapters)
PHP 7 Programming Cookbook
Credits
Foreword
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Making inter-framework system calls


One of the primary reasons for the development of PSR-7 (and middleware) was a growing need to make calls between frameworks. It is of interest to note that the main documentation for PSR-7 is hosted by PHP Framework Interop Group (PHP-FIG).

How to do it...

  1. The primary mechanism used in middleware inter-framework calls is to create a driver program that executes framework calls in succession, maintaining a common request and response object. The request and response objects are expected to represent Psr\Http\Message\ServerRequestInterface and Psr\Http\Message\ResponseInterface, respectively.

  2. For the purposes of this illustration, we define a middleware session validator. The constants and properties reflect the session thumbprint, which is a term we use to incorporate factors such as the website visitor's IP address, browser, and language settings:

    namespace Application\MiddleWare\Session;
    use InvalidArgumentException;
    use Psr\Http\Message\ { 
      ServerRequestInterface...