What are some best practices for organizing PHP applications and libraries within a web hosting environment?

When organizing PHP applications and libraries within a web hosting environment, it is important to follow best practices to ensure maintainability and scalability. One common approach is to use a modular structure, separating different components such as controllers, models, and views. Additionally, utilizing autoloading and namespaces can help manage dependencies and prevent naming conflicts.

// Example of organizing PHP application using a modular structure

// controllers/
//   UserController.php
//   ProductController.php
// models/
//   User.php
//   Product.php
// views/
//   user/
//     index.php
//   product/
//     index.php