Child theme is very very great concept. By the help of this you can just change your parent theme in your type without append any code in parent theme source code file. I have also used this facility in my WordPress theme. Child theme is very interesting concept . In child theme the two files worked simultaneously without any problem. My mean is that the child theme is a transparent layer. which you are append on our parent theme. Like , if you have any wordpress default theme and you wants to change your wordpress theme style . so just create your child theme and upload and use it .
/* Theme Name: Theme Name Theme URI: http://example.com/twenty-fourteen-child/ Description: your theme des. Author: your name Author URI: http://example.com Template: parent theme folder name Version: 1.0.0 Tags: light, dark, two-columns, right-sidebar, responsive-layout, accessibility-ready Text Domain: twenty-fourteen-child */ @import url("../twentyfourteen/style.css"); /* =Theme customization starts here */
After Adding this code in to your source file then you can start to your modification to your theme .
After Creating child theme source code file you save this by .css extension and then create a zip folder and upload it on your server