What are some best practices for structuring PHP code in a calendar application to improve readability and maintainability?

Issue: To improve readability and maintainability in a calendar application, it is essential to follow best practices for structuring PHP code. This includes organizing code into logical sections, using meaningful variable names, commenting code effectively, and following a consistent coding style. Code snippet:

// Define classes for calendar events and calendar views
class CalendarEvent {
    // Properties and methods for calendar events
}

class CalendarView {
    // Properties and methods for displaying calendar views
}

// Instantiate classes and use them in the calendar application
$event = new CalendarEvent();
$view = new CalendarView();