Object Oriented Programming Concept of PHP Language


What is PHP Object Oriented Programming

Object Oriented Programming is a software engineering methodology that structures program into real-world artifacts such as workers, vehicles, bank accounts, etc. The properties and methods of a real-world entity are described by a class. An object is a class event. PHP is a scripting language on the server-side, used mostly for web creation but also as a programming language of general use. Object oriented programming (PHP OOP), is a type of programming language concept applied to php5, which helps to build dynamic, reusable web applications.

The principles of PHP Object Oriented Programming are:

  • Class
  • Object
  • Inheritance
  • Interface
  • Abstraction
  • Encapsulation
  • Polymorphism
Object Oriented Programming


A class is an agent that decides how an item is going to act and what it is going to contain. In other terms, constructing a certain category of the structure is a model or a series of instructions.

In PHP, define a class using the keyword for class, followed by the class name and a series of curly braces ({}).

class MyClass
// Class properties and methods go here


A class describes the composition of a single instance of data. Once we define a class and then we make many objects which belong to it. Things are often referred to as examples.

An entity is anything that can accomplish a series of related activities.

class MyClass
// Class properties and methods go here
$obj = new MyClass; // creating object


When the child class accesses the property and methods of the parent class we term the process an inheritance. The child class may inherit the parent method and implement its own system, this property is called the overridden system. When inheriting the same parent class process we call the inherited system.

That concerns the relationship between classes. The connection takes the form of a parent and infant. The child uses the methods specified by the class of parents. Re-usability – a number of children may inherit from the same parent is the primary aim of inheritance.


An interface is a summary of the actions an entity may take. The user has composed in the same manner the system keyword declaration class is.


Abstraction is the concept of shifting the focus from the details and the concrete implementation of the things to the kinds of things (i.e. the classes), the available operations (i.e. methods). Instead of a definition, this is like a generalization.

Abstract classes and methods occur for a designated function of the parent class, but its child class(s) need to complete the assignments. A class that includes at least one abstract operation is an abstract class. A process that is defined but not enforced in the code is an abstract procedure. The abstract keyword is an abstract class or method.


Encapsulation is used to conceal the values or status of a specified data entity within a folder and prevents overt entry from unauthorized parties. It is the principle that motivates one to consider and cover its internal implementation/details by means of a method/class obligation. This allows long-term alteration of the internal code without impacting any aspect of the program. The encapsulation process is illumination.

This involves the covering of specifics of execution and disclosure of the methods only. The key purpose of encapsulation is to decrease program sophistication – it is convenient to conceal executing information and only reveal operations utilizing a class. Secure an object’s inner status – exposure to the entity variables is through methods such as getting and setting, allowing it stable and simple to hold. The internalization of the object may be modified until the coding that the system uses being damaged.


A common framework for organizations of different types is given. It basically means that, depending on your data type or class, PHP is able to process items differently. You can write interchangeable artifacts that share the same interface in this powerful feature. It’s just a common method with several specific forms of applying it. The key goal of polymorphism is to simplify and expand implementations.