how do you open and run a PHP file on Windows xp?

hi. i have a course and some of the files are PHP(whatever that means). I don’t know how to open, run and view them. Can anyone please help me here?
thanks
Answer #1
go and install xampp , put the file into the installation /htdocs folder , and open it with your web browser :
http:://localhost/phpfile.php
php files are webserver files … check the url on wbb , there you can find php as well.
Answer #2
thank you .