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

Tying entity classes to RDBMS queries


Most commercially viable RDBMS systems evolved at a time when procedural programming was at the fore. Imagine the RDBMS world as two dimensional, square, and procedurally oriented. In contrast, entities could be thought of as round, three dimensional, and object oriented. This gives you a picture of what we want to accomplish by tying the results of an RDBMS query into an iteration of entity instances.

Note

The relational model, upon which modern RDBMS systems are based, was first described by the mathematician Edgar F. Codd in 1969. The first commercially viable systems evolved in the mid-to-late 1970s. So, in other words, RDBMS technology is over 40 years old!

How to do it...

  1. First of all, we need to design a class which will house our query logic. If you are following the Domain Model, this class might be called a repository. Alternatively, to keep things simple and generic, we could simply call the new class Application\Database\CustomerService. The...