How to import pictures to the gallery in additional fields?

Okk I get it from this function:

function gallery_n_id($post_id, $att_id, $filepath, $is_keep_existing_images = '')
{
    
    // The custom field used for the gallery.
    $key = '_gallery';  

    // Retrieve existing gallery values.
    $gallery = get_post_meta($post_id, $key, TRUE);

    // If gallery is empty declare a new array.
    if (empty($gallery)) {
        $gallery = array();
    }

    // Check if the image is in the gallery.
    if (!in_array($att_id, $gallery)) {

        // If not, add it.
        $gallery[] = $att_id;

        // Save the new gallery.
        update_post_meta($post_id, $key, $gallery);

    }
}

add_action('pmxi_gallery_image', 'gallery_n_id', 10, 4);

But when I take the import: in the editing of the entry, the pictures appear but not on the page.

This is code on website to show gallery:

<?php
$images = get_field('gallery');
?>

<?php if($images):?>
	<div class="gallery1">
		<?php foreach( $images as $image):?>
		<a href="<?php echo $image['sizes']['large'];?>" rel="lightbox"><img src="<?php echo $image['sizes']['thumbnail'];?>" alt="<?php echo $image['alt'];?>" class="gallery2"></a>
		<?php endforeach;?>
	</div>
<?php endif;?>

Another thing. I would like the featured image not to be displayed in the gallery.

Featured image: <obrazek>
Gallery images: <foto0> <foto1> <foto2> <foto3> <foto4> <foto5>

How to do it?

• This reply was modified 3 years, 12 months ago by marekduse.

I solved the problem! I have installed the WP All Import Acf Add-On