If the hosting is still working correctly (i.e. you can load a hosted image from a browser), but web pages aren't loading... try uploading a test.html file and see if the browser loads that. As well upload a php file with one line of code:
See if your browser loads all of your PHP configurations when you load that page into a browser.
If that comes up blank, it sounds like PHP isn't functioning properly on your webserver. I work on a site that runs IIS and has PHP installed and this same thing happens occasionally. If it's a shared hosting (or you're not hosting yourself), call them up and tell them to fix their stuff.
If the above file DOES load the PHP info screen, then it sounds like the script your using does have something wrong with it.
Hope this helps.