when we talk about any programming, their several ways to program like procedural, object-oriented programming, etc.  

What is OOP in PHP?

OOP stands for Object-Oriented Programming.

there are generally two ways to do programming:

1. Procedural programming is about writing procedures or functions that perform operations on the data, 
2. Object-oriented programming is about creating objects containing data and functions.

Object-oriented programming has several advantages over procedural programming:

• OOP is faster and easier to execute 
• with OOP there is easy maintenance and debug
• OOP makes development possible to create full reusable applications with less code 
• OOP provides a shorter development time

there are two main concepts in OOP'S:

• objects
• classes

CLASS:

A class is a blueprint of objects. A class is created using the class keyword.

syntax:

class Class_name

{

#block of code

}

for Example: let's create a class named 'students'.

class Students

{

$rollno=10030;

}

OBJECTS:

It is a real-world entity that has its own property and behavior.

how to create an object?

to create an object of any class you have to use new keyword.

syntax:

$object_name=new Class_name();

example:

let's create some objects of class 'students'

<?php

class Students

{

        public $category="insan";

        public $rollno=10034;

        

        function reading()

        {

        echo "student is reading";

        }

} 

$om=new Students();

echo $om->rollno;

$om->reading();

 

?>

In above example:

class : Students

object : $om

properties: rollno, category

behaviors : reading