Now, to host PHP on IIS successfully you have to perform some following steps:

Step 1: Install IIS Web Server with CGI option in your system.

Step 2: Install PHP for Windows operating system in your system (For more details on PHP Installation click here)

Step 3: Configure the PHP configuration file (php.ini) to work with IIS web server

Step 4: Configure FastCGI module to work with PHP

Manually Configure php.ini file to work with IIS web server:

To run PHP on the IIS web server you have to make some changes in the php.ini file. Let’s take a look at these changes:

Step 1:  Set fastcgi.impersonate = 1

Step 2:  Set cgi.fipathinfo=1

Step 3:  Set cgi.force_redirect = 0

Step 4:  Set open_basedir to point to that folder or network path where the content of the Web site is located.

Step 5:  Set extension_dir to point to that location where the PHP extensions are located. Typically, for PHP 5.2.X the value would be set as extension_dir = "./ext"

Step 6:  Enable the required PHP extension by uncommenting the corresponding lines, for example:

extension = php_mssql.dll

extension=php_mysql.dll

Manually Configure FastCGI Module to work with PHP:

To manually configure the IIS and FastCGI extension, you have to perform some following steps:

Step 1: Open Internet Information Services (IIS) Manager (to open IIS manager type ‘inetmgr’ in run command textbox)

Step 2: Double click on ‘Handler Mapping’ and select ‘Add Module Mapping’ from left Action Pane. After that filled appropriate information into textboxes.

 Request path: *.php

Module: FastCgiModule

Executable: "C:\[Path to your PHP installation]\php-cgi.exe"

Name: PHP via FastCGI

After this, just click on ok button.

Now IIS web server is ready for run PHP file or PHP web site.