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Here’s an overview of CodeIgniter development:

1. Installation and Setup: Begin by downloading the latest version of CodeIgniter from the official website. Extract the downloaded package and configure it on your web server. CodeIgniter has minimal dependencies, making the setup process relatively simple.
2. Configuration: Customize the configuration of your CodeIgniter application. Set up the database connection, define base URLs, configure encryption keys, and adjust other settings according to your requirements. CodeIgniter provides a centralized configuration file where you can manage these settings.
3. Routing: Define routes in CodeIgniter to handle incoming HTTP requests and map them to the appropriate controllers and methods. You can configure routes to include placeholders, define custom routing rules, and set up route prefixes. CodeIgniter’s routing system enables clean and search engine-friendly URLs.
4. Controllers: Create controllers to handle the logic of your web application. Controllers receive requests, process data, interact with models, and load views to generate responses. CodeIgniter controllers are responsible for handling user input and coordinating the flow of your application.
5. Models: Define models to interact with databases and handle data-related operations. CodeIgniter supports a simple and intuitive Active Record implementation that simplifies database queries and data manipulation. Models in CodeIgniter help encapsulate data-related functionality and enforce separation of concerns.
6. Views: Use views in CodeIgniter to define the presentation layer of your application. Views contain HTML markup along with embedded PHP code to display dynamic data. CodeIgniter’s template parser provides additional functionality for managing layouts, partials, and reusable components.
7. Libraries and Helpers: Take advantage of CodeIgniter’s libraries and helpers to extend the core functionality of your application. CodeIgniter offers various pre-built libraries for tasks such as form validation, session management, file uploading, image manipulation, email handling, and more. Helpers provide utility functions that simplify common tasks.
8. Form Handling and Validation: Utilize CodeIgniter’s form handling and validation features to create and process user input. CodeIgniter provides form helper functions to generate HTML forms and validation rules to ensure the submitted data meets the required criteria. You can also create custom validation rules as needed.
9. Security Measures: Implement security measures in your CodeIgniter application to protect against common threats. Use CodeIgniter’s built-in security features, such as input data sanitization, output escaping, CSRF (Cross-Site Request Forgery) protection, and encryption utilities. Follow security best practices to safeguard your application.
10. Testing and Debugging: Write tests to ensure the functionality and stability of your CodeIgniter application. CodeIgniter supports various testing frameworks, allowing you to perform unit tests, integration tests, and functional tests. Utilize logging and debugging tools provided by CodeIgniter to troubleshoot and resolve issues.
11. Deployment: Prepare your CodeIgniter application for deployment to a production environment. Optimize the configuration settings, enable caching, and ensure secure file and directory permissions. Set up a web server like Apache or Nginx to serve the application and configure domain settings as necessary.
12. Maintenance and Updates: Keep your CodeIgniter application up to date with the latest releases and security patches. Regularly monitor the application for errors, performance issues, and compatibility problems. Maintain a backup strategy to protect your data and files.

CodeIgniter’s simplicity and performance make it a popular choice for developing small to medium-sized web applications. By leveraging its features, libraries, and conventions, you can create efficient and scalable web applications with ease.

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