1. Go to this page and download the library: Download w3lifer/php-calendar library. Choose the download type require.
2. Extract the ZIP file and open the index.php.
3. Add this code to the index.php.
<?php
require_once('vendor/autoload.php');
/* Start to develop here. Best regards https://php-download.com/ */
php
public function get(
int $numberOfMonths = 12,
int $startMonth = null, // Default: date('n')
int $startYear = null // Default: date('Y')
): PhpCalendar