How to add .php on wordpress category

hello

can onyone tell me how to add .php on wordpress category.

like:

mysite.com/category/article.php


please make sure, am not asking to add .php on post or pages. asking on category.


Thanks

 

You can do that by adding the ".php" to your permalink structure
For more info you should take a look here: http://codex.wordpress.org/Using_Permalinks#PATHINFO:_.22Almost_Pretty.22

 

Thanks for your reply.

Yes i used this /%category%/%postname%.php but its does not work for category

still category is like mysite.com/category/article but i need like mysite.com/category/article.php