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Codeigniter Project Structure
When you install CodeIgniter 4, the project structure will look like this:
codeigniter_project/
│
├── app/ # Your application code (controllers, models, views, config)
├── public/ # Publicly accessible folder (index.php, assets, etc.)
├── system/ # Core CodeIgniter framework files (DO NOT MODIFY)
├── tests/ # PHP unit and feature tests
├── vendor/ # Composer dependencies
├── writable/ # Cache, logs, sessions, uploads
│
├── .env # Environment-specific settings (dev, prod)
├── composer.json # Composer configuration file
├── phpunit.xml.dist # PHPUnit config
├── README.md # Project description
└── spark # CLI tool to run CodeIgniter commands
Workflow Summary
1. Request hits /public/index.php
2. Routes to /app/Controllers/...
3. Uses /app/Models to fetch/save data
4. Loads /app/Views to show output