METHOD TWO: Manual Creation
A child theme consists of at least one directory, the child theme directory, and two files, style.css and functions.php, which you will need to create

Step One: Create the Child Theme Directory
The child theme directory will be placed in wp-content/themes. It is recommended, but not required, that you append “-child” to the name of your child theme directory (Example: mytheme-child). Ensure there are no spaces in your child theme directory name and capitalization of the parent theme is consistent , which might result in errors.

Step Two: Create the Child Theme’s Stylesheet
Your child theme’s stylesheet, style.css, must begin with the stylesheet header below. Please update appropriately to reflect the names of your theme and ensure the Template line corresponds to the directory name of the parent theme.

/*
Theme Name: My Theme Child
Theme URI: http://example.com/my-theme-child/
Description: My Theme Child Theme
Author: Jane Doe
Author URI: http://example.com
Template: mytheme
Version: 1.0.0
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Tags: light, dark, two-columns, right-sidebar, responsive-layout, accessibility-ready
Text Domain: my-theme-child
*/

Step Three: Enqueue the Parent and Child Theme Stylesheets
Please note that the previous method was to import the parent theme stylesheet using @import. This is no longer best practice, and the correct method is to enqueue the parent theme stylesheet by adding a wp_enqueue_scripts action and using wp_enqueue_style() in your child theme’s functions.php.

You will need to create a functions.php file in your child theme’s directory The first line of your child theme’s functions.php will be an opening PHP tag (<?php), after which you will enqueue your parent and child theme stylesheets. The example function below will only work if your parent theme uses only one main style.css to hold all of the CSS. If your theme has more than one CSS file (eg. ie.css, style.css, main.css), you will have to make sure to maintain all parent theme dependencies.

<?php
add_action( 'wp_enqueue_scripts', 'theme_enqueue_styles' );
function theme_enqueue_styles() {
wp_enqueue_style( 'parent-style', get_template_directory_uri() . '/style.css' );
}
?>

Your child theme’s stylesheet is usually loaded automatically. If it is not, you will need to enqueue it also. Setting ‘parent-style’ as a dependency will ensure the child theme stylesheet loads after it. See example below:

<?php
function theme_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() . '/style.css',
array( $parent_style )
);
}
add_action( 'wp_enqueue_scripts', 'theme_enqueue_styles' );
?>