My end goal in all of this is to create a gallery page that automatically uploads images attached to any published post on the site. In my search I found the code below (also found here), placed it in my fucntions.php and it works great, BUT I can't use any of the other gallery output options (size, order, orderby, etc...) to help organize the images in the way I want. Looking at the code it seems as if I need to add/introduce the other output options, but being very new to this, I'm not sure how to modify the code below to make this happen. Any thoughts?
/**
* Usage: [catgallery cat="4,5"]
* Attribute: array of category IDs
*/
add_shortcode('catgallery', 'wpse_70989_cat_gallery_shortcode');
function wpse_70989_cat_gallery_shortcode($atts)
{
// $return = ''; // DEBUG: enable for debugging
$arr = array();
$cat_in = explode( ',', $atts['cat'] );
$catposts = new WP_Query( array(
'posts_per_page' => -1
, 'category__in' => $cat_in
) );
foreach( $catposts->posts as $post)
{
// DEBUG: Enable the next line to print the post title
// $return .= '<strong>' . $post->post_title . '</strong><br />';
$args = array(
'post_type' => 'attachment'
, 'numberposts' => -1
, 'post_status' => null
, 'post_parent' => $post->ID
);
$attachments = get_posts($args);
if ($attachments)
{
foreach ( $attachments as $attachment )
{
// DEBUG: Enable the next line to debug the attachement object
// $return .= 'Attachment:<br /><pre>' . print_r($attachment, true) . '</pre><br />';
$arr[] = $attachment->ID;
}
}
}
// DEBUG: Disable the next line if debugging
$return = do_shortcode( '[gallery include="' . implode( ',', $arr ) . '"]' );
return $return;
}
The default Wordpress gallery comes with orderby and size options as specifed here so just add which option you like to the do_shortcode line.
If you want something more complex, you may have to develop a custom plugin.