How can PHP be used to generate and display dynamic calendar views on a website, incorporating features like date navigation and data input forms?

To generate and display dynamic calendar views on a website using PHP, you can create a PHP script that generates the calendar grid based on the current month and year. You can incorporate features like date navigation by allowing users to move between months and years. Additionally, you can include data input forms for users to add events or appointments to specific dates on the calendar.

<?php
// Get the current month and year
$month = isset($_GET['month']) ? $_GET['month'] : date('n');
$year = isset($_GET['year']) ? $_GET['year'] : date('Y');

// Generate the calendar grid
$calendar = new Calendar($month, $year);
echo $calendar->generate();

// Calendar class to generate the calendar grid
class Calendar {
    private $month;
    private $year;

    public function __construct($month, $year) {
        $this->month = $month;
        $this->year = $year;
    }

    public function generate() {
        // Generate the calendar grid HTML here
    }
}
?>