configurations for the Subdomain module in drupal 7 - drupal-7

Question

What are the appropriate configurations for the Subdomain module in drupal 7 on Window 7 running XAMPP?
My site is localhost/example
Here are the changes I have made:
settings.php
$cookie_domain = '';
Leaving this commented out gives me an error
"The $cookie_domain variable in settings.php is not set".
Uncommenting and putting in "localhost", ".localhost", "example", ".example" gives me an "Access denied" error.
It seems to accept "localhost/example" or a blank ' ', although I don't know if this is the right thing to do.
host
127.0.1.1 localhost example
(and I can successfully ping ideastar)
http.conf
NameVirtualHost *:80
<VirtualHost *:80>
ServerName example
ServerAlias *.example
DocumentRoot C:/xampp/htdocs
</VirtualHost>
getting the fallowing error
Subdomain error: localhost and subdomain-test.localhost did not resolve to the same IP address. Your DNS may be improperly configured and subdomains will likely not work.

Answer 1

First you should create two virtual host one for main domain and another for sub-domain. For ex: like we have two domains example.com and test.example.com to setup on local host. I am assuming that you have a fresh install of Xampp on your machine. Your virtual host [\xampp\apache\conf\extra\httpd-vhosts.conf] file should have these entries:
<VirtualHost *:80>
DocumentRoot "\xampp\htdocs\example"
ServerName example.com
ServerAlias example.com
</VirtualHost>
<VirtualHost *:80>
DocumentRoot "\xampp\htdocs\example"
ServerName test.example.com
ServerAlias test.example.com
</VirtualHost>
Now open you system host file and make the following entries below the line "127.0.1.1 localhost" (localhost ip 127.0.0.1)
127.0.1.1 example.com
127.0.1.1 test.example.com
\xampp\htdocs\example this directory should contain your Drupal setup.
Cookie domain entry should be as per the below line
$cookie_domain = '.example.com';
i have assumed that you already have a Drupal site running at http:\localhost\example.