For example if you want to create a virtual directory called test, and the directory is in the D:/example/test, then modify your httpd.conf and add the following entry at the bottom of the file:

<Directory "D:/example/test/">
    Options Indexes
    AllowOverride all
    Order Allow,Deny
    Allow from all
</Directory>

Alias /test D:/example/test

On a typical Windows installation, the httpd.conf file is usually located in the following directory:

C:\Program Files\Apache Software Foundation\Apache2.2\conf\httpd.conf

So if a file file.htm exists in D:/example/test,  the URL of the resource is:

http://www.example.com/test/file.html

and it will be served from:

D:/example/test/file.html

For more information visit the Apache HTTP Server Version 2.2 documentation.

You need to tell PHP the root directory of Apache ie. In PHP.INI change the doc_root variable so that it holds the root directory of Apache:

Change PHP.INI (Usually located in [DRIVE]:\PHP\) entry for doc_root:

doc_root = "C:\Program Files\Apache Software Foundation\Apache2.2\htdocs"

Add the following lines in HTTPD.CONF (Usually located in [DRIVE]:\Program Files\Apache Software Foundation\Apache2.2\conf\):

ScriptAlias /php/ "C:/Program Files/PHP/"
AddType application/x-httpd-php .php .php5
Action application/x-httpd-php "/php/php-cgi.exe"
SetEnv PHPRC "C:/Program Files/PHP"

DirectoryIndex index.html index.php

Remove deny all from the following entry in HTTPD.CONF:

<Directory />
    Options FollowSymLinks
    AllowOverride None
    Order deny,allow
    Deny from all
</Directory>

So that the new entry looks similar to:

<Directory />
    Options FollowSymLinks
    AllowOverride None
    Order deny,allow
</Directory>

That’s it… Happy coding!