Viewing PHP file created by Dreamweaver CS3 in a web browser locally

Hi all,

This is my first post and I'm a total novice with this query.

I've developed a website in Dreamweaver CS3 where all of my pages are PHP. For the last two days I have been able to view the pages locally using the "view in browser" button and selecting Firefox. If I tried to use Internet Explorer I would get a pop-up saying "Do I want to open or save this file", the file being the page I've tried to view, index.php for example. However, Firefox, just opened the PHP file as if it were an ordinary HTML file.

However, all of a sudden without any warning I can no longer view the pages in Firefox. When I try I get the "what do you want to open the file with?" and if I select Firefox I just get a blank page!

I don't have any testing sites set up or have Apache installed or any other server based software for that matter.

Is there any reason why this would just start happening?

Hope you can help.

Regards,

Rich