How can one ensure that their PHP code is organized and structured effectively when building a calendar?

To ensure that PHP code for building a calendar is organized and structured effectively, it is important to separate the logic for generating the calendar from the HTML output. This can be achieved by creating reusable functions for handling date calculations and generating the calendar grid. Additionally, using object-oriented programming principles can help in organizing the code into classes and methods for better maintainability.

<?php

class Calendar {
    public function generateCalendar($month, $year) {
        // Calendar generation logic here
    }

    private function getDaysInMonth($month, $year) {
        // Calculate the number of days in a month
    }

    private function getFirstDayOfWeek($month, $year) {
        // Determine the day of the week for the first day of the month
    }
}

$calendar = new Calendar();
$calendar->generateCalendar(9, 2022);

?>