My Xampp isn't running PHP. Why?

[ime40se]

I just downloaded Xampp for Windows,created a database, entered the userid:s into the wp-config.php and tried to set up World Press, but the installation file for WP says "WordPress requires that your web server is running PHP. Your server does not have PHP installed, or PHP is turned off." My control panel indicates that both Apache and MySQL are running, but when I tried to run a PHP script on my browser I got an error. Could PHP have been closed off on my Xampp-server, and how can I activate it again? Or is the problem in the connection between Xampp and the World Press database? Grateful for a quick answer. Thanks. Marie

[Altrea]

How do you request your php files?
What does your Browser show you in the address bar?