Description #
CodeIgniter is a lightweight and high-performance PHP framework designed for developers who need a simple yet powerful toolkit to create full-featured web applications.
History #
CodeIgniter was initially developed by EllisLab in 2006 and later maintained by the British Columbia Institute of Technology (BCIT). Its emphasis on speed, minimal configuration, and clear documentation made it a popular choice among PHP developers.
Hello World Code #
class Hello extends CI_Controller {
public function index() {
echo "Hello, World!";
}
}How to Run #
Option 1: Online
PHP Fiddle
Option 2: Local
composer create-project codeigniter4/appstarter hello_world
php spark serveKey Concepts #
- MVC architecture
- Extremely lightweight footprint
- Zero configuration to start
- URL routing and controllers
- Built-in security features
- Form validation and helpers
- Active Record database support
- Error handling and debugging tools
- Minimal learning curve
- Great for small-to-medium apps
Try It Online #
Fun Facts #
CodeIgniter 3 remains widely used, even after the release of CodeIgniter 4, due to its stability and familiarity.
