Error installing PHP using Web Platform Installer on Windows 10/IIS 10

I am developing an ASP MVC website… I have bought a plugin which uses PHP files and I want to use it within my site.

I am trying to install PHP 7.1.1 on Windows 10, IIS 10, using Web Platform Installer 5.0.

I am getting an error:

[error message]
I have already tried these:
1> set this key value to 8

.Net 3.5 installed and WCF TTP Activation is enabled for .Net Framework 3.

What’s the best way to get the PHP files working on my machine?


Source: stackoverflow-php

Multiple CGI/FastCGI processes on IIS 8.5

i have a IIS 8.5 server with php 5.4.24. When request increase on my running site then huge CGI/FastCGI open and site become unreachable. site down and give 500 internal server ERROR. I have tried in many ways but problem remaining same. as per my observation only 2-3 process stay active . rest other process stay inactive and make the system slow.
Is their any body can help me to figure it out the solution.

necessary configuration parameter is as below:
in php.ini:

max_execution_time=30 max_input_time=60

IIS->FastCGI Settings:

MaxInstance=0 PHP_FCGI_MAX_REQUESTS=100000

I have already checked the following links . But don’t get any proper solution.
Using Fast CGI

Please check the necessary images as below:

enter image description here

Source: stackoverflow-php