Codelgniter 3-AI-powered web application framework

Example

A typical CodeIgniter project is structured using the MVC design pattern. In this setup, the controller handles user inputCodeIgniter 3 overview, the model interacts with the database, and the view displays the output to the user.

Scenario

In a typical e-commerce application, the Controller would handle incoming requests such as displaying product pages, while the Model would fetch data from the database (like product information and prices), and the View would render that data on a webpage. This separation of concerns makes the code easier to manage and scale.

Example

CodeIgniter’s routing system allows developers to define custom URL structures and map them to specific controllers or methods.

Scenario

In an online marketplace, if you want to create a custom URL such as `/products/123` to show the details of a specific product, CI3’s routing can map this URL to a specific controller method (e.g., `ProductController::show(123)`), making URLs user-friendly and SEO optimized.

Example

CodeIgniter offers an easy-to-use database abstraction layer and a query builder that allows developers to interact with databases without writing raw SQL queries.

Scenario

Imagine you are building a blog application, and you need to fetch posts by a particular author. With CI3's query builder, you can easily write: `$this->db->where('author_id', $author_id)->get('posts');`, which helps keep the code concise, readable, and secure by preventing SQL injection.

Example

CI3 has a robust form validation class that allows developers to easily validate and sanitize user input before processing it.

Scenario

In a user registration form, you might want to ensure that the user provides a valid email address and that all required fields are filled out. CodeIgniter makes this process easy with built-in validation rules like `required`, `valid_email`, and `min_length`.

Example

CodeIgniter provides built-in session handling capabilities, which makes it easy to manage user sessions for things like authentication and user preferences.

Scenario

If you're building a login system, you can easily store the user's ID in the session once they successfully log in, and then check for that session on every subsequent page to confirm that the user is authenticated.

Example

CodeIgniter includes several built-in security features such as XSS filtering, CSRF protection, and encryption.

Scenario

For a web application that processes sensitive data, such as a financial application, the CSRF protection built into CI3 would prevent malicious users from submitting unauthorized requests on behalf of others. The XSS filter would sanitize user input to prevent cross-site scripting attacks.