url rewriting using htaccess

[eluser]thas[/eluser]
hi all,

I am new to this forum. i have no idea to create subdomain. if anybody know please help me.

the extract url is:

http://domain.com/index.php/login/defaul...ubdomain/0

I want to write like it

http://domain.com/subdomain


Any help is greatly appreciated !!!! :exclaim: