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  • Don’t need these
    $url = $image[‘url’];
    $title = $image[‘title’];
    $alt = $image[‘alt’];
    $caption = $image[‘caption’];

    <!--Gallery Tag Lighbox Code//-->
    <div class="centerWidth popupGallery">
    <?php $images = get_field('pop_up_gallery');
    $size = 'square'; // (thumbnail, medium, large, full or custom size)
    if ($images): ?>
    <ul id="galleryList">
    <?php foreach($images as $image_id): 
    $content = '<li class="list-inline-item">';
    $content = '<a class="gallery_image" href="'. wp_get_attachment_url($image_id, $url).'">';
    $content = '<div class="galleryPhoto" style="background-image:url('. wp_get_attachment_url($image_id, $size) .');"></div>';
    $content = '<div class="galleryTitle"><p>'.wp_get_attachment_caption($image_id, $caption).'</p></div>';
    $content = '</a>';
    $content = '</li>';
    if ( function_exists('slb_activate') ){
    $content = slb_activate($content);
    }
    echo $content; ?>
    <?php endforeach; ?>
    </ul>
    <?php endif; ?>			
    </div>