What are some best practices for organizing PHP files and folders in a website structure?

Organizing PHP files and folders in a website structure is essential for maintaining a clean and manageable codebase. One best practice is to separate concerns by grouping related files together, such as placing all database-related files in a "models" folder and all view files in a "views" folder. Another approach is to use an MVC (Model-View-Controller) architecture to separate the application logic, data, and presentation layers.

// Example folder structure for organizing PHP files in a website
- /models
  - db_connection.php
  - user_model.php
- /views
  - header.php
  - footer.php
  - homepage.php
- /controllers
  - user_controller.php
- /helpers
  - validation_helper.php