WordPress Version: 6.1
/**
* Retrieves the image srcs from galleries from a post's content, if present.
*
* @since 3.6.0
*
* @see get_post_galleries()
*
* @param int|WP_Post $post Optional. Post ID or WP_Post object. Default is global `$post`.
* @return array A list of lists, each containing image srcs parsed.
* from an expanded shortcode
*/
function get_post_galleries_images($post = 0)
{
$galleries = get_post_galleries($post, false);
return wp_list_pluck($galleries, 'src');
}