footer.php

<footer>
    <!-- Quick and dirty spacing -->
    <br /><br /><br /><br />
    <hr>
    <p><small>By David Nash. For the full post, see <a href="https://davidnash.com.au/create-an-autocomplete-field-in-wordpress-2019-update">Create an autocomplete field in WordPress: 2019 Update</a></small></p>
</footer>

<?php wp_footer(); ?>

</body>
</html>