Book Image

Modular Programming with PHP 7

By : Branko Ajzele
Book Image

Modular Programming with PHP 7

By: Branko Ajzele

Overview of this book

Modular design techniques help you build readable, manageable, reusable, and more efficient codes. PHP 7, which is a popular open source scripting language, is used to build modular functions for your software. With this book, you will gain a deep insight into the modular programming paradigm and how to achieve modularity in your PHP code. We start with a brief introduction to the new features of PHP 7, some of which open a door to new concepts used in modular development. With design patterns being at the heart of all modular PHP code, you will learn about the GoF design patterns and how to apply them. You will see how to write code that is easy to maintain and extend over time with the help of the SOLID design principles. Throughout the rest of the book, you will build different working modules of a modern web shop application using the Symfony framework, which will give you a deep understanding of modular application development using PHP 7.
Table of Contents (19 chapters)
Modular Programming with PHP 7
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface
Free Chapter
1
Ecosystem Overview
Index

Databases and Doctrine


Databases are the backbone of almost every web application. Every time we need to store or retrieve data, we do so with the help of databases. The challenge in the modern OOP world is to abstract the database so that our PHP code is database agnostic. MySQL is probably the most known database in the PHP world. PHP itself has a great support for working with MySQL, whether it is via the mysqli_* extension or via PDO. However, both approaches are MySQL specific, to o close to database. Doctrine solves this problem by introducing a level of abstraction, enabling us to work with PHP objects that represent tables, rows, and their relations in MySQL.

Doctrine is completely decoupled from Symfony, so using it is completely optional. The great thing about it, however, is that the Symfony console provides great auto-generated CRUD based on Doctrine ORM, as we saw in previous examples when creating Customer entity.

As soon as we created the project, Symfony provided us with an...