Is it possible to directly execute PHP files on a local system by double-clicking them?

No, it is not possible to directly execute PHP files on a local system by double-clicking them because PHP files need to be interpreted by a web server that can run PHP scripts. To run PHP files locally, you need to set up a local server environment like XAMPP, WAMP, or MAMP that can interpret PHP code. Once you have a local server environment set up, you can run PHP files by accessing them through a web browser using the server's localhost address.

<?php
// PHP code snippet
echo "Hello, World!";
?>