The latest release of PHP Manager 1.2 for IIS now includes Windows PowerShell commands that can be used to install, configure and manage PHP on IIS 7 from command line. In addition those commands can be used to automate the configuration and management
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Read the complete post at http://blogs.iis.net/ruslany/archive/2011/06/28/command-line-tools-for-managing-php-in-iis.aspx