Chapter 2. BASICS OF OBJECT-ORIENTED PROGRAMMING
This chapter is aimed at an audience unfamiliar with the basic concepts of object-oriented programming (OOP). The intent is to provide a general overview of OOP with a view toward using PHP effectively. We'll restrict the discussion to a few basic concepts of OOP as it relates to PHP, though it is sometimes useful to look at other object-oriented (OO) languages such as Java or C++.
We'll discuss three aspects of object orientation in this chapter: class, access modifiers, and inheritance. Although OOP may be a different programming paradigm, in many respects it's an extension of procedural programming, so where appropriate, I'll use examples from procedural programming to help explain these concepts. ...
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