Applies To: Windows Server 2012 R2, Windows Server 2012 The first step in planning to build a PHP website on IIS 8 is to determine how to install IIS along with the CGI module, where to download and install the appropriate PHP version, and how to add your application files to IIS. The following list shows the tasks required to complete this step: 1.1. Plan to Install IIS 1.2. Plan to Download and