<?php
// short code
function gif_uu_dai()
{
    ob_start();
    ?>

<div class="gif-uu-dai text-center my-3">
    <a href="<?=LIVE_CHAT?>">
         <img class="img-fluid" src="<?= get_template_directory_uri() ?>/image/gif_uu_dai.gif" alt="ưu đãi">
    </a>
   
</div>

    <?php
    return ob_get_clean();
}

add_shortcode('gif_uu_dai', 'gif_uu_dai');