Are there any PHP viewers available that allow for the execution of PHP scripts independently of a web server?

One way to execute PHP scripts independently of a web server is by using a command-line PHP interpreter. This allows you to run PHP scripts directly from the command line without the need for a web server. You can install PHP on your local machine and then use the terminal to run your PHP scripts.

<?php
// Your PHP script code here
echo "Hello, world!";
?>