Code for creating Child Theme and the benefits of using a child theme.

Minimum files needed for a child theme:

• functions.php
• style.css
• screenshot.png

Minimum code for functions.php:

<?php
/**
 * @author        Salil Agarwal, WordPress Developer & Consultant
 * @author-URL    https://blue-cloud.io
 * @email     	  salil@blue-cloud.io
 */

add_action('wp_enqueue_scripts', 'bcloud_child_theme_enqueue_styles');
function bcloud_child_theme_enqueue_styles()
{
    $parenthandle = 'parent-style'; // This is 'parent-style' for the parent theme.
    $theme = wp_get_theme();  // Gets a WP_Theme object for a theme.

    wp_enqueue_style(
        $parenthandle,
        get_template_directory_uri() . 'https://d1ct21abl073ls.cloudfront.net/style.css',
        // get_template_directory_uri() Retrieve theme directory URI.
        array(),  // if the parent theme code has a dependency, copy it to here
        $theme->parent()->get('Version')
    );

    wp_enqueue_style(
        'child-style',
        get_stylesheet_uri(),  //Retrieves the URI of current theme stylesheet.
        array($parenthandle),
        $theme->get('Version') // this only works if you have Version in the style header
    );
}

Minimum code for style.css.

/*
 Theme Name:   <Parent theme name> Child Theme - <client name>
 Theme URI:    https://blue-cloud.io
 Description:  <Parent theme name> Child Theme
 Author:       Salil Agarwal
 Author URI:   https://blue-cloud.io
 Template:     <Parent theme name>
 Version:      1.0.2
 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:  <Parent theme name>child
*/

Benefits of using child theme

We should add and use a child theme from the start of the project. This way we do not loose the settings that are saved by theme to the database.