noobydoobydoo

i'm a noob using gentoo and today i emerged apache with apache2 in my USE variable in /etc/make.conf, started the server and tested it from a browser using: http://localhost/ .So far so good. Then i emerged dev-lang/php and the apache config file got updated to include: APACHE_OPTS="-D DEFAULT_HOST -D PHP5. I then created a sample .php file in /var/www/localhost/htdocs/ .But when i try to access this file from a browser using: http:///var/www/localhost/htdocs/file.php OR: file:///var/www/localhost/htdocs/file.php i just get error 404: filenot found OR the url was not found on the server.Does this mean PHP is not working as an apache module?, if so what can i do?.Or does it just mean that the server needs more info on where to find it's filesystem?, if so how do i give this info to apache? Thankx kindly for any help