I would recommend using PHP on an Apache web server rather than on Microsoft IIS. There were a few problems that I ran into and features that were dearly needed that the PHP/Windows implementation lacked.
If you want to do PHP development, its best to use what works in the world it was developed on - FreeBSD/Linux/Un*x/Apache/etc. There's not much affection for PHP on Windows 😃
I can only say that this will save you time and frustration.
Or...
Try looking up the documentation for show_source() to get around this.
Hope this helps
Kerry Kobashi
Kobashi Computing