How to use CodeIgniter8 framework in php?

CodeIgniter8 is a commonly used PHP framework. Its design goal is to be simple, fast and flexible. It is characterized by imitating the MVC pattern of Ruby on Rails, but also adds PHP features to its technology and philosophy. When using the CodeIgniter8 framework, you need to use the following steps.

Step one: Download the CodeIgniter8 framework file to your local computer.

Before downloading the framework file, you first need to determine whether PHP has been installed successfully and whether the selected code editor supports PHP code editing. If these are ready, you can go to the CodeIgniter8 official website to download. Extract the downloaded framework file to a convenient location on your local computer. The following is a list of files that may be used:

• index.php is the framework entry file.
• application/config/config.php is the configuration file used to set general settings for the framework and application.
• application/controllers/ is the directory where the controller is placed.
• application/models/ is the directory where the model is placed.
• application/views/ is the directory where view files are placed.
• assets/ is the directory used to store static resources such as CSS, javascript, and images.

Step 2: Configure the web server to support the CodeIgniter8 framework.

By default, CodeIgniter8's index.php file assumes that the framework is running in the root directory of the web server, however, if you need to install the framework in a subdirectory, you need to configure it accordingly.

For Apache server, the public path of the framework can be defined in the .htaccess file. For example, if the CodeIgniter8 framework is installed in a subfolder named "myapp", you can copy the following .htaccess file into the subfolder:

RewriteEngine on
RewriteBase /myapp/
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php?/$1 [L]

For other web servers, such as Nginx , or you can modify its configuration file to support the CodeIgniter8 framework.

Step 3: Create a controller.

The controller is responsible for handling HTTP requests from the web browser. Create a class (e.g. Welcome.php) in the framework's application/controllers directory as your first controller.

defined('BASEPATH') OR exit('No direct script access allowed');
class Welcome extends CI_Controller {
public function index()
{

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}
}

In the above code snippet, we have created a controller named Welcome, which inherits from the CI_Controller class. The index() method is the default action of the controller. In this method, we load the welcome_message view file through the $this->load->view() method.

Step 4: Create a view file.

The view presents the data that the controller displays to the user. Create a file called welcome_message.php in the application/views directory of the framework. This is an HTML file. It can contain PHP style code to pass data from the controller and display that data in a specific way.

:) Congratulations! You are ready to develop with CodeIgniter8 Framework

Step 5: Test the application.

In the above steps, we created the controller and view. Next, we can run the application in a web browser. Enter the application URL into your browser: http://localhost/myapp/index.php/welcome/index. If everything is fine, you will see output like this:

Congratulations! You are ready to develop with CodeIgniter8 Framework

Summary:

In this article , we have learned how to use the CodeIgniter8 framework. First, we downloaded and installed the CodeIgniter8 framework. Second, we configured the web server to support the CodeIgniter8 framework, created a controller and a view, and finally tested the CodeIgniter8 application. If you are new to the CodeIgniter8 framework, dig into its documentation and code to gain more knowledge about the CodeIgniter8 framework.

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