<?php 
header("Content-type: text/css"); 
$theme_folder = '/mnt/stor1-wc1-dfw1/384947/assets.morefocus.com/web/content/v42/themes/';
$theme_css    = $theme_folder . $_GET['theme'] . '/core.css';
if(file_exists($theme_css)): include($theme_css); else: include($theme_folder . 'default/core.css'); endif;
?>