Classes and Objects in PHP

Learn how to use object-oriented programming in PHP.

Key Concepts

Review core concepts you need to learn to master this subject

PHP extends keyword

PHP Constructor Method

PHP class

// Dog class inherits from Pet class. 
class Dog extends Pet {
  function bark() {
    return "woof";
  }
}

In PHP, to define a class that inherits from another, we use the keyword extends:

class ChildClass extends ParentClass {
}

The newly defined class can access members with public and protected visibility from the base class, but cannot access private members.

The newly defined class can also redefine or override class members.

Classes and Objects

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