function testimonialLoop()
{
    ob_start();
    $args = array(
        'post_type' => 'our-testimonials',
        'posts_per_page' => -1
    );
    $result = new WP_Query($args);
    ?>
    <div class="row">
        <div class="col-md-10">
            <div class="slider-for">
            <?php if ($result->have_posts()) : ?>
                <?php while ($result->have_posts()) : $result->the_post(); ?>
                    <div class="testimonialsSingle">
                        <div class="testimonialsContent">
                            <div class="testimonialsContentInner">
                                <div class="ContentInner">
                                    <div class="serDesc"><?php echo wp_trim_words(get_the_content(), 20, '...'); ?></div>
                                    <div class="rating">
                                        <span class="star <?php the_field('rating'); ?>"></span>
                                    </div>
                                    <div class="testimonialTitle">
                                        <span><strong><?php the_title(); ?></strong></span> /
                                        <span><?php the_field('designation'); ?></span>
                                    </div>
                                </div>
                            </div>
                            <?php the_post_thumbnail('full'); ?>
                        </div>
                    </div>
                <?php endwhile; ?>
            <?php endif; ?>
        </div>
        </div>
        <div class="col-md-2">
            <div class="slider-nav">
            <?php if ($result->have_posts()) : ?>
                <?php while ($result->have_posts()) : $result->the_post(); ?>
                    <div class="testimonialsImg">
                        <?php the_post_thumbnail('full'); ?>
                    </div>
                <?php endwhile; ?>
            <?php endif; ?>
        </div>
        </div>
    </div>
    <?php
    wp_reset_postdata();
    return ob_get_clean();
}

add_shortcode('testimonial-code', 'testimonialLoop');