// 另有无需进行修改注册表的安装包，经测试最高支持Windows Server 2016 版本，下载地址如下： https://github.com/EnhWeb/PHPManager/tree/master/bin/Release
PHP Manager 安装失败的解决方法，
PHP Manager 1.4 for IIS 10
我能够在PHP经理的网站找到解决方法。
只要确保您已安装.NET 3.5并修改以下注册表：
I was able to find a workaround at the PHP manager's site.
Just make sure you have .NET 3.5 installed and modify the following registry:
HKLM/System/CCS/Services/W3SVC/Parameters/MajorVersion
The value is 10 (Ax0). Just change the value to 9 (or 8), then try to install it again.
To avoid future issues with other IIS stuff, change back to 10 (Ax0). It seems that PHP Manager validates the value converting it into string or something related.
Here is the issue from PHP Manager's website: