Why not? Manufacturing Execution Systems run on Windows; when virtually all your servers are Windows because of the apps you need to run, setting up a few Linu

Why not? Manufacturing Execution Systems run on Windows; when virtually all your servers are Windows because of the apps you need to run, setting up a few Linux servers for minor apps for internal use only is not worth, so PHP in fast-CGI more under IIS is a very simple and effective solution. Having support people with good expertise on both Windows and Linux is expensive, having 2 separate teams in expensive (if you need high uptime), especially when the ratio Windows to Linux is just 10:1 or 20:1. Keep it simple, run PHP on Windows. EDIT: I forgot to mention the pseudo-SSO called Windows Integrated Authentication that works with just a few clicks on Windows, probably a lot more key presses (typing) in Linux.