In this tutorial, this tutorial can help you to create a Login and Registration using PHP's CodeIgniter 4 Framework. The tutorial aims to provide students and new programmers with a reference for learning to code for developing web applications using CodeIgniter 4. Here, I will be providing the scripts of a simple web application with a Login and Registration feature.

The Login and Registration Form is one of the most common security features of a website or web application. Users must input the necessary information in the login form in order to access the specific website or pages. The section with a combination of input fields is the same as the Registration form, and users must fill it up with information to generate a login ID and password.

The Login and Registration Form can be developed in Codeigniter 4 easily by creating a Login and Registration model, controllers, and views. To give you a better idea of how to achieve this, check out the scripts and instructions below for creating a simple web application with a Login and Registration feature.

Before we start the coding part, please make sure to download and install a virtual server such as XAMPP/WAMP on your local machine. After the successful installation, make sure to start the Apache and MySQL servers. Then download CodeIgniter 4 Framework and place it in htdocs directory for XAMPP and www for WAMP. Visit the official documentation site for installation instructions for Codeigniter 4 framework.

Browse the PHPMyAdmin [http://localhost/phpmyadmin] in your prefered browser and create a new database named login_db.

Next, setup the database credentials in Codeigniter .env file. The file is located in the root folder of your CI4 project.

Next, update your project's base URL variable located in the app/Config/App.php.