Creating a new CodeIgniter project

CodeIgniter is a popular PHP framework that allows developers to build dynamic web applications quickly and efficiently. In this article, we will walk you through the process of creating a new CodeIgniter project, from installation to setting up a basic project structure.

Step 1: Installation

Before you can create a new CodeIgniter project, you need to install CodeIgniter on your local development environment. Here are the steps to do so:

  1. Download the latest version of CodeIgniter from the official website ( or clone the GitHub repository if you prefer using version control.
  2. Extract the downloaded ZIP file or clone the repository to your chosen location on your local development server.
  3. Rename the extracted folder to the desired project name.

Step 2: Configuration

Once you have installed CodeIgniter, you need to configure some basic settings for your new project. Here is what you need to do:

  1. Go to the application/config folder in your CodeIgniter project directory.
  2. Open the config.php file in a text editor.
  3. Update the base_url setting to match the URL of your local development server or the production server where the project will be hosted.
  4. Set the encryption key to a random string. CodeIgniter uses this key for encryption and security purposes. You can generate a random string using a tool like openssl or an online generator.
  5. Save the config.php file.

Step 3: Routing

Routing is an essential part of any CodeIgniter project as it directs incoming requests to the appropriate controllers and methods. Here is how you can set up routing for your new project:

  1. Open the routes.php file located in the application/config directory.
  2. Define your custom routes using the routes.php configuration file. For example, if you want the URL to map to the Welcome controller's index method, you can add the following line:\ $route['welcome'] = 'Welcome';
  3. Save the routes.php file.

Step 4: Creating Controllers

Controllers handle the logic and flow of your application. In CodeIgniter, controllers are located in the application/controllers directory. Here is how you can create a new controller:

  1. Go to the application/controllers directory.
  2. Create a new PHP file with the desired controller name, ending in .php. For example, ExampleController.php.
  3. Open the newly created file in a text editor.
  4. Define your controller class with the proper naming convention and extend the CI_Controller class. For example, class ExampleController extends CI_Controller.
  5. Add methods to your controller to handle various actions/routes of your application. For example, a method named index() will be called when the corresponding route is accessed.
  6. Save the file.

Step 5: Accessing the Application

To access your CodeIgniter application, you need to navigate to the URL where it is hosted. If you are using a local development environment, the URL might be something like localhost/project-name. Here are the general steps:

  1. Start your local development server or configure your web server if you are using a production environment.
  2. Open your favorite web browser.
  3. Enter the URL of your CodeIgniter project in the address bar and hit Enter.
  4. If everything is set up correctly, you should see the default CodeIgniter welcome page or any specific content you defined in your controllers.

Congratulations! You have successfully created a new CodeIgniter project. Now you can start building your web application using the powerful features and tools provided by CodeIgniter.

Remember to refer to the official CodeIgniter documentation ( for more detailed information and tutorials on various topics related to CodeIgniter development. Happy coding!

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