Classes and Objects

Question 1

A _____ is what we call a function inside of a class.

Answer 1

method

Question 2

A _____ is what we call a variable inside of a class.

Answer 2

property

Question 3

Describe a Class in object oriented PHP

Answer 3

An extensible template for creating objects, providing initial values for state and implementations of behavior.

Question 4

What are the three main areas of focus in regards to object oriented programming?

Answer 4

• Encapsulation
  
  • a way to bundle or organize our data into a format that is easily readable and extensible
  • also about controlling access to code by using visibility keywords to define if something is public, private, and so on
• Polymorphism
  • it allows you to present a type of contract or requirements of a class that can be shared across many different class types
  • a way for you to define methods that are shared, by implemented differently
• Inheritance
  
  • a method of establishing relationships such as a parent is to a child or between classes or objects
  • through a process of subclassing, you can create a heirarchy that gives the power of resuing a code defined by a parent

Question 5

Describe an object when related to OOP

Answer 5

Individual instances of Class created by using the new operand.

Question 6

_____ is a language mechanism for restricting access to some of the object’s components by using visibility keywords

Answer 6

Encapsulation

Question 7

Create a class called Fish.

Answer 7

<?php <br/>class Fish {
}
$bluegill = new Fish();
?\>