Object-oriented programming is the method of programming that uses classes to organize the data and structure of an application. The object oriented programming covers all concepts such as object, class, inheritance, polymorphism, encapsulation, abstract class, PHP access modifiers, constructor, and destructor. Hire freelancers online who have knowledge in PHP scripting as they are ones who will handle database side of your App/Web.
Object Oriented Programming Concept:
Object: – object is the instance of a class. An object is the collection of similar properties and similar method in the class. PHP objects have a similar type of properties and so some things. The class name cannot be any keyword in PHP. While creating an object of class use “new” keyword followed by the class name and assign unique PHP variable. The object is characteristics with behaviour, identity, and method.
Class: Class is the template for an object. In PHP class is declared as “class” keyword followed by the class name and then curly braces. Curly braces decide the scope of class in which programmer write code. The class is the collection of methods, variable, and constants. You can declare a class only once, but you can initiate as many versions if it is already in memory.
Syntax of Class
Class classname
{
// variable of class
Var $variable1;
Var $variable2;
//function of class
Function merges Variable ()
{
Return $this->variable1. $this->variable2;
}
}
PHP Constructor: Constructor has the same name as class name. When you create an object, the constructor gets automatically invoked. The constructor does not have a return type, so it does no return anything. You need to define the constructor in PHP by implementing the construct () method. For ex If you create a class of Business, you would have to implement function Business (). You invoke the method when you create a class. The constructor can take any number of input values. Post Freelance Jobs Online in PHP sector
Class Business {
Public function_ construct () {
// code
}
}
PHP Destructor: PHP also allows you to define class destructor same as other object oriented programming languages. PHP call destructor as soon as the object is no longer available and the destructor function _ destruct (), takes no parameters. Programmer calls destructor when the object gets destroyed.
Public function __destruct ()
{
Print “{$this->Name} is no more…\n”;
}
Access Modifiers in PHP
An access modifier means handling the visibility of methods and properties within the class. Visibility of method and properties is handled by three keywords Private, Public, and protected.
Private: The method and properties declared within the class and this method and properties not accessed outside the class. The class member with “this” keyword is available within the class itself.
Public: – When method and properties declared as “public” that method and properties are accessed within the class as well as outside the scope of the class.
Protected: – When method and properties declared as “Protected” that method and properties accessed within the class and from its child class.
Inheritance in PHP
Inheritance is significant in Object oriented programming language because it avoids the duplication of code. Inheritance allows the class to access to inherit members from other class. Using inheritance can create a reusable piece of code that you write only once in the super class and use again as much as you need in the subclass. Inheritance in PHP is declared as “extends” keyword
<? Php
Class ParentClass
{
//……class code
}
Class ChildClass extends ParentClass
{
//…..Class code
}
?>
Polymorphism in PHP:
Polymorphism is an object oriented concept. The word polymorphism comes from Greek which means that ‘poly’ means many and morph means form. In object oriented programming polymorphism has two types’ static polymorphism and dynamic polymorphism. But Unfortunately, PHP does not support static polymorphism. Dynamic polymorphism can redefine the method in a subclass with the same name with the same signature or with the same name with different signature. Run time polymorphism is also known as runtime polymorphism. Run time polymorphism is also known as function overriding. Hire freelancers online in this area as this is not a regular full time work you may need.
Encapsulation in PHP:
It is an object-oriented concept that wrapping up data member and method in a single unit is known as Encapsulation. Encapsulation mostly used for protection of data. For security, you make a method private by making method private it is not possible to access method outside the class. Using encapsulation, you can hide the data, and you can make class read only and write only by setter and getter method. Encapsulation is same as enclosing related operation and data related to an object into that object.
Abstraction in PHP
You can only initiate an abstract class, and you can declare it with the keyword abstract. Abstract methods inside the abstract class have not a body and only name and parameter inside the parentheses. One can’t initialise the abstract classes directly.
Abstract class MyAbstractClass
{
Abstract function myAbstractFunction () {
}
}
Interface in PHP
Interface like an abstract class in which they include abstract methods that the programmer should define in the class that inherits from the interface. Interface replaces the class key word without having the method of contents defined. In PHP programming you cannot create an object for an interface.
The advantage of OOPS concept Using PHP
• Object oriented concept is very useful to maintain large projects.
• The complete project is easy to understand using object oriented programming over the year.
• Object model rewriting is for better performance and more features.
• Using Encapsulation and abstraction software complexity can be easily managed
• Using Encapsulation code is maintained properly with proper security
• Using inheritance it very easy to reuse the code by extending any part of the code without affecting the other program.
• Using OOPS concept PHP object model more powerful and efficient for PHP developers to organize and understand easily. Post Freelance Jobs Online regarding PHP language and using the same in web development projects.
Summary
In this article, you can get the knowledge regarding the object oriented concept in PHP. Object oriented concept in PHP is powerful for managing the large application. The article covers all object oriented concept such as class, object, inheritance, encapsulation, abstraction, interface, constructor, and destructor. It also covers the advantage of OOPS concept in PHP.