All you need to do is create one folder, and stylesheet and functions file. And make sure that you have FTP access, before you continue reading this documentation.
Log into your website using your favorite FTP client, such as FileZilla, and navigate to wp-content/themes/ directory. This is the directory where all your themes are living a happy life.
Now, you need to create a new folder for your child theme. You can name it anything. For this example, we will be creating a child theme of Zerif Lite, so we will name it zerif-lite-child.
Once you have created your folder, you need to create a style.css file inside that folder. Your stylesheet will consist some vital information inside it, so paste the following in it using your favorite text editor:
/* Theme Name: Zerif Pro Child Theme URI: https://www.themeisle.com/ Description: This is a custom child theme I have created. Author: Chuck Norris Author URI: https://www.themeisle.com/ Template: zerif-pro Version: 0.1 */
Now, we need to load the stylesheet of the parent theme. Create a file named functions.php in the child theme folder, edit it, and paste the following:
<?php add_action( 'wp_enqueue_scripts', 'child_enqueue_styles',99); function child_enqueue_styles() { $parent_style = 'parent-style'; wp_enqueue_style( $parent_style, get_template_directory_uri() . '/style.css' ); wp_enqueue_style( 'child-style',get_stylesheet_directory_uri() . '/custom.css', array( $parent_style )); } if ( get_stylesheet() !== get_template() ) { add_filter( 'pre_update_option_theme_mods_' . get_stylesheet(), function ( $value, $old_value ) { update_option( 'theme_mods_' . get_template(), $value ); return $old_value; // prevent update to child theme mods }, 10, 2 ); add_filter( 'pre_option_theme_mods_' . get_stylesheet(), function ( $default ) { return get_option( 'theme_mods_' . get_template(), $default ); } ); } ?>
Now, Create a file named custom.css in the child theme folder, and add your CSS code there. It make easier to handle CSS code in separate file.
That's all. You just to save your progress and that's it.