Денис Янчевский

add_image_size( 'homepage-thumb', 9999, 50, true );

function my_add_meta_boxes_page() {
    global $post;
    if ( $post->ID == 1 ) {
        add_meta_box( $args );
    }
}
add_action( 'add_meta_boxes_page', 'my_add_meta_boxes_page' );

<?php
$paged = (get_query_var('page')) ? get_query_var('page') : 1;
$args = array(
    'post_type' => 'product',
    'product_cat' => 'cat-1',
    'paged' => $paged,
    'orderby' => 'date'
);
$my_query = new WP_Query($args);
$counter = 0;
while ($my_query->have_posts()) :
    $my_query->the_post();
    ?>
    <a data-slide-index="<?php echo $counter; ?>"> </a>
    <?php
    $counter++;
endwhile;
wp_reset_query();
?>

<?php
$parent_id = $post->post_parent;
$parent_title = get_the_title($parent_id);
?>
<a href="<?php the_permalink($parent_id); ?>"><?php echo $parent_title; ?></a>

add_filter('post_gallery', 'dco_post_gallery', 10, 3);

function dco_post_gallery($output, $attr, $instance) {
    $_attachments = get_posts(array('include' => $attr['include'], 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => $attr['order'], 'orderby' => $attr['orderby']));

    $attachments = array();
    foreach ($_attachments as $key => $val) {
        $attachments[$val->ID] = $_attachments[$key];
    }

    if (empty($attachments)) {
        return '';
    }

    ob_start();
    foreach ($attachments as $id => $attachment) :
        $full = wp_get_attachment_image_url($id, 'full');
        $thumbnail = wp_get_attachment_image_url($id, 'thumbnail');
        $alt = $attachment->post_excerpt;
        ?>
        <a class="gallery__item f__col" href="<?php echo $full; ?>">
            <img src="<?php echo $thumbnail; ?>" class="gallery__item__img" alt="<?php echo esc_attr($alt); ?>" />
        </a>
        <?php
    endforeach;
    return ob_get_clean();
}