I've read quite a bit, but for some reason am having trouble figuring out where my "document root" is located.
I looked in the file "httpd.conf" and it tells me that the server root is located at "C:/xampp/apache"
So I created a folder and simple PHP file in that folder. The folder is located at file:///C:/xampp/apache/php_practice/hello.php which I browse to from within my browser. The HTML reads OK, but there's no PHP text showing.
I have the xampp control panel open and it looks like Apache is running, MySql is also running. Am I not looking/working in the right folder?

