As PHP 7.4 released recently so there may be chances to face issues with the new versions. So sometimes we need to downgrade PHP from the latest version. Follow the below steps to downgrade PHP to 7.3

This Brute force attack is a method in cryptography, to hack the system by using several combinations of passwords or passphrases or PINs. The intruder uses several techniques which involve guessing of the commonly used phrases or passwords. For this, they take a set of alphabets and numbers till the desired combination of passcode is met.

 While writing object-oriented programming we have to include class files to call the method of the classes.

Sometimes we have to include a long list of needed includes (one for each class) at the beginning of each script.

Now, in PHP5 there is no longer necessary to includes classes. In PHP5 the spl_autoload_register function registers any number of autoloaders , enabling for classes and interfaces to be automatically loaded if they are not defined, PHP is given a last chance to load the class before throwing error.

 e.g :

<?php

 spl_autoload_register(function ($classname) {

    include  $classname . '.php';

});

 $object  = new Class1();

$object2 = new Class2();

 ?>

In the above example we do not need to include class1.php and class2.php .  spl_autoload_register() function will automatically load class1.php and class2.php .

When we are going to work with classes and objects we always think why there is need of classes and object although without classes and objects our code works well. But after some work on classes and objects we think, yeah its better to work with classes and objects .And then we can understand that Object oriented Programming is better than procedural Programming.

Object oriented programming requires a different way of thinking about how can we construct our application.

Lets take a short example:

When we are going to build a house .We distribute the works needed to make a house we can divide the works in different part and deliver to different persons like plumber for water supply, electrician for electricity etc. The electrician doesn’t need to know that the work of plumber and vice versa.

In the same way in Object Oriented Programming we can divide our applications in different modules called classes .And one class is separate from other classes .It has its own functionality and features.

So what advantages we can get from Object Oriented Programming:

1: Reusability Of Code:  In object oriented programming one class can easily copied to another application if we want to use its functionality

       e.g.  When we work with hospital application and railway reservation application .In both application we need person class  so we have to write only one time the person class  and it can easily use in other application.

2: Easily Discover a bug: When we work with procedural programming it take a lot of time to discover a bug and resolve it .But in object   Oriented Programming   due to modularity of classes  we can easily discover the bug and we have to change in one class only and  this change make in all the application only by changing it one class only.

3: Object- Oriented Programming enables us to easily model our applications based on the real world which help us to easily identify the requirements, what code is to be written and how different classes interact with each other which have same properties and behaviors.

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