Theme Horse

Thanks for your reply. But where i will add the function?
One help. I created a child theme on my local host. Style.css file is working good. But when i want to add other file it is not working. I elaborately saying…
my child theme folder name: interface-child
css code:
/*
Theme Name: interface Child Theme
Author: Self-Help WordPress User
Template: interface
*/

@import url(“../interface/style.css”);
My problem is that when i want to alter some code copying the same file on same folder from parent theme, it doesn’t affect on site. What is problem? Is there anything wrong ?
For example:
I want to change interface-footer_info.php file. I copied the file on interface-child/inc/interface-footer_info.php. But when i change anything it doesn’t affect on the site. Please help me.