These should be installed on your web server to ensure PHP functions properly through Fast CGI.At this point, your server is ready to go, but just to be sure we can confirm your PHP setup through IIS pretty easily.
First, we configure Fast CGI to work with PHP under the “Fast CGI Settings” option (this feature is installed as part of the IIS 7 Administration Pack).
In the Fast CGI Settings screen, add an application.
Add a new variable named “PHP_MAX_REQUESTS” and set the value to the same amount as the “Instance Max Requests” setting above.
Apply all settings until you get back to the primary IIS Manager screen.
In the Windows directory, rename this file to ‘php.ini’.