I haven’t coded PHP in 15 years, and I can't remember how to get started. I set up PHP 8.1 with apache2 on my Ubuntu 22.04 desktop, but I don’t recall how/where to set up my files and how to test them in a web browser. For example if I made a traditional hello.html (with php echo embedded) see below, how do I get it into my web browser to see if it works? It currently sits in my home folder.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>title</title>
<!-- link rel="stylesheet" href="style.css" -->
<!-- <script src="script.js"></script -->
</head>
<body>
<!-- page content -->
<?php
phpinfo();
?>
</body>
</html>