PHP final Classes and Methods

In this chapter you will learn:

1. Why do we need final keywords
2. Syntax to use final keywords

Why

To lock down a class so that it can't be inherited from. Or to lock down one or more methods inside a class so that they can't be overridden in a child class.

By doing this, you know that your class or methods within your class will always behave in exactly the same way.

Syntax

You can add the keyword final before a class or method definition to lock down that class or method.

Here's how to create a final class:

final class MyClass { 

} 

Here's how you make a final method:

class ParentClass { 
   public final function myMethod() { 
            echo "A method"; 
   } /*java2s .  c o m*/
} 

Next chapter...

What you will learn in the next chapter:

1. What is an abstract class
2. Syntax for abstract class
3. Note for abstract class
4. Example - abstract class

Concept for Object Oriented Design

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PHP Create Object from Class

PHP Class Properties

PHP Iterating Object Properties

PHP Class Inheritance

PHP Overriding Methods

PHP final Classes and Methods

PHP Abstract Class

PHP Class Access Control Modifiers

PHP Class Constructor

PHP Class Destructors

PHP Class Magic Methods