What is the best practice for organizing PHP files in a project directory structure?

Organizing PHP files in a project directory structure is essential for maintaining a clean and structured codebase. One common approach is to group related files together in folders based on functionality or module. This helps improve readability, organization, and maintainability of the code.

// Example directory structure for a PHP project:
// - /app
//   - /controllers
//     - UserController.php
//     - ProductController.php
//   - /models
//     - User.php
//     - Product.php
//   - /views
//     - user_view.php
//     - product_view.php
// - /config
//   - config.php
// - /public
//   - index.php