CodeIgniter is a popular PHP framework known for its simplicity and performance. It's designed to help developers build web applications quickly and with minimal configuration. Here are some key features and concepts related to CodeIgniter:
Lightweight CodeIgniter has a small footprint, making it fast and efficient. It doesn't require a lot of configuration and works well with low-resource environments.
MVC Architecture CodeIgniter follows the Model-View-Controller (MVC) design pattern, which helps in separating the application's logic, data, and presentation layers.
Built-in Libraries The framework comes with a variety of built-in libraries for common tasks such as database interaction, form validation, and session management.
Simple Configuration Configuration in CodeIgniter is straightforward, with most settings found in configuration files. It doesn't require complex XML or YAML configurations.
Security Features CodeIgniter includes several security features like XSS filtering, CSRF protection, and encryption libraries to help protect your application from common threats.
Active Record Database Library It provides a convenient and secure way to interact with databases using an abstraction layer.
Extensible You can easily extend the core system by adding your own libraries, helpers, and plugins.
Error Handling CodeIgniter provides a built-in mechanism for error handling and debugging, which helps in developing robust applications.
Download the latest version from the [CodeIgniter website](https://codeigniter.com/).
Extract the files and place them in your web server's root directory.
Set up your environment, including configuring your database and base URL in `application/config/config.php` and `application/config/database.php`.
Controllers handle the user's requests and interact with models and views.
Create a new controller by creating a PHP file in `application/controllers` with a class that extends `CI_Controller`.
php
class Welcome extends CI_Controller {
public function index() {
$this->load->view('welcome_message');
}
}
Models interact with the database and perform CRUD operations.
Create a model by creating a PHP file in `application/models`.
php
class User_model extends CI_Model {
public function get_users() {
$query = $this->db->get('users');
return $query->result();
}
}
Views are used to generate the HTML output.
Create view files in `application/views`.
Define routes in `application/config/routes.php` to map URLs to controllers and methods.
$route['default_controller'] = 'welcome';
Load libraries and helpers as needed in your controllers or autoload them via `application/config/autoload.php`.
$this->load->library('form_validation');
$this->load->helper('url');
Documentation The [official CodeIgniter documentation](https://codeigniter.com/user_guide/) is comprehensive and a great place to start.
Community Join forums, or check out community resources and GitHub repositories for additional support and examples.
If you have any specific questions or need help with a particular aspect of CodeIgniter, feel free to ask!
