<?php

$fromwho = "from your whippet";
echo "Hello $fromwho\n";

/*

https://www.w3schools.com/php/
https://www.w3schools.com/php/php_string.asp

This file is called Demo-PageOne.php, to run it, in a terminal type: php Demo-PageOne.php

The output is:
$ php Demo-PageOne.php
Hello from your whippet

*/

?>