What are the best practices for logical code organization in PHP for forum development?

When developing a forum in PHP, it is important to organize your code logically to maintain readability, scalability, and maintainability. One common practice is to separate concerns by dividing your code into different files or classes based on their functionality. This can include separating database interactions, user authentication, forum post handling, and frontend display logic. By organizing your code in this way, it becomes easier to debug, update, and expand your forum application.

// Example of logical code organization for forum development in PHP

// db.php - file for handling database interactions
class Database {
    // Database connection code here
}

// auth.php - file for user authentication
class Auth {
    // User authentication code here
}

// forum.php - file for forum post handling
class Forum {
    // Forum post handling code here
}

// index.php - main file for frontend display logic
include 'db.php';
include 'auth.php';
include 'forum.php';

// Frontend display code here