Give a WordPress admin page a custom line of text in Dashboard footer

wp-modify-admin-footer-text.php

<?php
/**
 * Customize WordPress Admin Page Footer Text
 *
 * This code snippet adds a custom line of text to the WordPress admin page footer.
 * Place this code in your theme's functions.php file or an included file.
 * Example output: Made with ♥ by Knol Aust
 *
 * Gist Keywords: wordpress, admin
 * @category   Customization
 * @author     Knol Aust
 * @version    1.0.0
 * @description This code adds a custom text line with a link to your website in the WordPress admin footer.
 * @link       https://knolaust.com
 */

/**
 * Modify Admin Footer Text
 */
function knolaust_modify_footer_admin()
{
    // customize your output here
    echo 'Made with &hearts; by <a href="https://knolaust.com" target="_blank">Knol Aust</a>.';
}

// Hook the function to modify the admin footer text
add_filter('admin_footer_text', 'knolaust_modify_footer_admin');