Summary
This brings us to the end of our first chapter. Let's quickly recap what we have covered. First of all, we explored what the term OOP actually means. We looked at some other programming styles and used this to compare with some OOP code to hopefully highlight the differences. We then had a quick look through some popular PHP OOP projects that are worth looking at in more detail if you would like to see some real-world code and maybe get your hands dirty. Finally, we had a very quick overview of some basic OOP features. You should already know these in detail and so we didn't go over them in any depth – if you do not already know them, then you are encouraged to hit the official docs to fill in the gaps. In the next chapter, we are going to look at some more advanced topics in object-oriented PHP related to the ways that we can orchestrate a graph of related objects, either using inheritance or, alternatively, using composition.