Before learning anything new, you have to ask two questions about why..? and how..?Why you need to learn Codeigniter 4..? I will teach you why you need to learn Codeigniter 4 with bootstrap 4.What are the significant concepts/updates coming with CodeIgniter 4, I will also compare every single idea with CodeIgniter 3 so you can easily understand the difference between CI3 with CI4 if you want to learn CodeIgniter 4 deeply than you are at the right place.In this series, you will learn how and where you can start CodeIgniter 4 with the worlds robust front-end framework, Bootstrap 4.I will cover every fundamental concept in this series, once you complete the basic than I will teach you how to create web application and Website.I will give you some concepts related to templates and why you need to break your HTML content into multiple views. I will also teach you the new things related to the template in CodeIgniter 4. I will teach you how to use Helpers, libraries, and query builder in CodeIgniter 4, you will learn how to create your application using MVC (Model View Controller) approach. You will learn how to validate your forms from the server site, and I will give you some tricks and tips related to security. You will also learn the practical work of CodeIgniter with Bootstrap 4; I will teach you how you can send/receive data with AJAX(without page refresh). We use jQuery to send data from the client to Server with AJAX.We will discuss the ORM (Object Relational Mapping).I will perform CRUD operation so you can easily understand the essential process of CodeIgniter, and yes, we will also cover how we can create the login and signup system in CodeIgniter 4.While working on projects, we always use the third party templates and of course, the Admin panel template, don’t worry I am going to teach you how to use the third-party templates in CodeIgniter 4. Yes, we will download the third party templates and also the admin panel.We will also discuss the jquery plugin on how to add and use them in the project.We will discuss layouts while working on views, and while working on CodeIgniter 4 libraries, we will discuss the new libraries and how to use them. While working on the Model/database, we will discuss two tools: Using CodeIgniter’s Model and Using Entity Classes, we will deeply learn this section because it’s necessary.