What considerations should be made when integrating PHP and JavaScript functionalities for dynamic date display on a webpage?

When integrating PHP and JavaScript functionalities for dynamic date display on a webpage, it is important to ensure that the date is properly formatted and passed between the two languages. One common approach is to use PHP to generate the initial date value on the server side, then pass it to JavaScript for further manipulation and display on the client side.

<?php
// Get the current date in PHP
$current_date = date('Y-m-d H:i:s');

// Pass the date to JavaScript for dynamic display
echo "<script>var currentDate = '$current_date';</script>";
?>