What function can be used in PHP to display the server date?

To display the server date in PHP, you can use the `date()` function. This function formats a timestamp into a human-readable date. You can specify the format of the date you want to display by passing a format string as the second parameter to the `date()` function.

<?php
$date = date('Y-m-d H:i:s'); // Get the current server date and time in the format YYYY-MM-DD HH:MM:SS
echo "Server date and time: " . $date;
?>