Why would something like this happen. Without having made any changes to any files, today suddenly .php pages in a photo gallery in the site are not loading in the browser window but instead are being downloaded as a file. In Firefox for example I get this message:
You have chosen to open
which is a: application/x-http-php
What should Firefox do with this file?
I have other pages in the site, .php pages that are working just fine. Any ideas as to what is causing this and how to fix it?