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PHP Advanced and Object-Oriented Programming: Visual Quickpro Guide, Third Edition by Larry Ullman

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5. Advanced OOP

Chapter 4, “Basic Object-Oriented Programming,” covers the fundamental concepts of OOP in PHP. A fair amount of theory is also discussed there, because that’s half the OOP battle. Here, things get more advanced (hence the chapter title!), going into the more abstract aspects of OOP, with ample time again given to theory.

Most of the topics discussed in this chapter involve inheritance, the understanding of which is crucial to using OOP. You’ll learn how to have one class inherit from another, and the various ways that a class’s ...

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