Can't get started with https://github.com/leafo/scssphp.
Trying out with:
<?php
//(I live in directory /tests)
require('../scss.inc.php');
$dir = 'C:\xampp\htdocs\scssphp-master\tests\inputs'; //tried 'inputs'
scss_server::serveFrom($dir);
//outputs:
/* INPUT NOT FOUND scss v0.1.5 */
?>
Sorry for crying but docs at http://leafo.net/scssphp is out of reach, flagged by firewall as "chat"
Try a relative path to your directory and that directory should be located in your project relative from your PHP file where you have added your code.