// Add custom footer links
                function add_custom_footer_links() {
                    echo '<div class="custom-footer-links" style="text-align: center; margin-top: 20px;">';
                    echo '<a href="https://abc.com" target="_blank" style="margin-right: 10px;">abc</a>';
                    echo '</div>';
                }
                add_action('wp_footer', 'add_custom_footer_links');
         
                <br />
<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /mnt/171/sda/3/9/teamwaf/wp-content/themes/teal/functions.php:620) in <b>/mnt/171/sda/3/9/teamwaf/wp-includes/class-IXR.php</b> on line <b>398</b><br />
XML-RPC server accepts POST requests only.