XAMPP and personal misunderstandings.....

Just in these minutes a XAMPP-Server has been set up. It wasn't that easy because I needed some time to check that Skype is using port 80 and Apache cannot connect.
Everything worked fine, but strangely Apache couldn't connect at first. All I had to do is to uncheck the ports in Skype: Options/Connections

php
echo "Hello World!";
?>