It doesn’t seem to be working. Its using a repeater to add new images for a image slider i have. Is that why its not working? And yes its set up to display image ID now.
<?php if (have_posts()) : while (have_posts()) : the_post(); ?>
<div <?php post_class() ?> id="post-<?php the_ID(); ?>">
<?php
$attachment_id = get_sub_field('illustrations_image');
$size = "full"; // (thumbnail, medium, large, full or custom size)
$image = wp_get_attachment_image_src( $attachment_id, $size );
$attachmentinfo = get_post( $attachment_id );
$alt = get_post_meta($attachmentinfo->ID, '_wp_attachment_image_alt', true);
?>
<ul class="slider">
<li><img src="<?php echo $image[0]; ?>" alt="<?php echo $alt; ?>" /><li>
</ul>
</div>
