Design patterns

Design patterns are commonly used solutions to problems that occur regularly in software development. As a developer, you will sooner or later come across this term, if you have not done so already – and not without a reason, as these patterns are based on best practices and have proven their usefulness.

In this section, we will tell you more about the different types of design patterns and why they are so important that they became part of this book. Furthermore, we will introduce you to some common design patterns that are widely used in PHP.

Understanding design patterns

Let us have a closer look at design patterns now. They can be considered templates to solve particular problems and are named according to the solution they provide. For example, in this chapter, you will learn about the Observer pattern, which can help you to implement a way to observe changes in objects. This is very useful when you write code, but also when you design software...