get_post_galler_image

<div class="row members_row">
            <div class="col-lg-6 order-lg-1 order-md-12 order-sm-12 order-12 image_dienn">

                <?php $gallery = get_post_gallery_images();
            if(count($gallery)<=1):
                ?>
                <div id="carouselExampleControls" class="carousel slide" data-ride="carousel">
                    <?php
                for($i = 0; $i < count($gallery); $i++):?>
                    <div class="carousel-inner">
                        <img src="<?= $i['src'];?>" alt="">
                    </div>
                    <?php endfor;
                ?> </div><?php
            else:?>
                <img src="<?php the_post_thumbnail_url();?>" alt="">
                <?php
            endif;?>
            </div>

            <div class="col-lg-6 order-lg-12 order-md-1 order-sm-1 order-1 title_content_dienn">
                <h1><?php the_title();?></h1>
                <p><?php the_field('content');?></p>
                <a href="<?php the_permalink();?>" class="seemore hvr-grow-rotate">See more</a>
            </div>