Import product images by WooCommerce additional variation images - WebToffee Product Import Export for WooCommerce

functions.php

function webtoffee_import_additional_product_variation_images($post_data = array()) {

    $key = array_search('woo_variation_gallery_images', array_column($post_data['postmeta'], 'key'));

    if (isset($key) && !empty($key) && isset($post_data['postmeta'][$key]['value']) && !empty($post_data['postmeta'][$key]['value'])) {
        $imge_urls = explode(',', $post_data['postmeta'][$key]['value']);
        if ($imge_urls) {
            foreach ($imge_urls as $url) {

                $filename = substr(basename($url), 0, -5);

                $post = array(
                    'post_title' => $filename,
                    'post_status' => 'inherit',
                );
                $upload = WF_ProdImpExpCsv_Product_Import::fetch_remote_file($url, $post);

                if (!is_wp_error($upload)) {
                    if ($info = wp_check_filetype($upload['file']))
                        $post['post_mime_type'] = $info['type'];

                    $post['guid'] = $upload['url'];
                    $attachment_id = wp_insert_attachment($post, $upload['file']);

                    if (!is_wp_error($attachment_id) && $attachment_id > 0) {
                        $attachment_ids[] = $attachment_id;
                    }
                }
            }
        }
        if (!empty($attachment_ids)) {
            $post_data['postmeta'][$key]['value'] = $attachment_ids;
        }
    }
    return $post_data;
}

add_filter('hf_alter_product_import_data', 'webtoffee_import_additional_product_variation_images');