In this article, I’ll show how I upgrade my PHP version 5.5 which comes by default when Installing WordPress on Windows Server 2012 or 2016 using the Web Platform Installer.
To update, PHP I recommend you Install PHP Manager before because If you don’t WPI will try to Install it with PHP 7.
Note: If you don’t have.NET 2.0 Installed the PHP Manager Installation will fail however PHP 7 will be Install correctly.
To get started, Open the Web Platform Installer 5.0 and search for PHP 7 and Click Add
Search for PHP 7+ and Click add
Wait for the Installation to complete
Open PHP Manager and you will see the current PHP version