Attachments: parent is page or post?

[mjcampagna]

Working on breadcrumbs for a WordPress theme. Attachments may belong to either a post or a page, and I would like them to appear accordingly in my breadcrumbs.

This is the function for my breadcrumbs:

function breadcrumbs() {



$delimiter = '';

$home = 'Home'; // text for the 'Home' link

$before = '
'; // tag before the current crumb

$after = '
'; // tag after the current crumb



if ( !is_home() && !is_front_page() || is_paged() ) {



echo '
';



global $post;

$homeLink = get_bloginfo('url');

echo '
' . $home . '' . $delimiter . '
';



if ( is_category() ) {

global $wp_query;

$cat_obj = $wp_query->get_queried_object();

$thisCat = $cat_obj->term_id;

$thisCat = get_category($thisCat);

$parentCat = get_category($thisCat->parent);

if ($thisCat->parent != 0) echo( '
' . get_category_parents($parentCat, TRUE, '' . $delimiter . '
'));

// echo $before . 'Archive by category "' . single_cat_title('', false) . '"' . $after;

echo $before . single_cat_title('', false) . $after;



} elseif ( is_day() ) {

echo '
' . get_the_time('Y') . '' . $delimiter . '
';

echo '
' . get_the_time('F') . '' . $delimiter . '
';

echo $before . get_the_time('d') . $after;



} elseif ( is_month() ) {

echo '
' . get_the_time('Y') . '' . $delimiter . '
';

echo $before . get_the_time('F') . $after;



} elseif ( is_year() ) {

echo $before . get_the_time('Y') . $after;



} elseif ( is_single() && !is_attachment() ) {

if ( get_post_type() != 'post' ) {

$post_type = get_post_type_object(get_post_type());

$slug = $post_type->rewrite;

echo '
' . $post_type->labels->singular_name . '' . $delimiter . '
';

echo $before . get_the_title() . $after;

} else {

$cat = get_the_category(); $cat = $cat[0];

echo '
' . get_category_parents($cat, TRUE, '' . $delimiter . '') . '
';

echo $before . get_the_title() . $after;

}



} elseif ( !is_single() && !is_page() && get_post_type() != 'post' && !is_404() ) {

$post_type = get_post_type_object(get_post_type());

echo $before . $post_type->labels->singular_name . $after;



} elseif ( is_attachment() ) {

$parent_id  = $post->post_parent;

$breadcrumbs = array();

while ($parent_id) {

$page = get_page($parent_id);

$breadcrumbs[] = '
ID) . '">' . get_the_title($page->ID) . '
';

$parent_id	= $page->post_parent;

}

$breadcrumbs = array_reverse($breadcrumbs);

foreach ($breadcrumbs as $crumb) echo '' . $crumb . '' . $delimiter . '';

echo $before . get_the_title() . $after;



} elseif ( is_page() && !$post->post_parent ) {

echo $before . get_the_title() . $after;



} elseif ( is_page() && $post->post_parent ) {

$parent_id  = $post->post_parent;

$breadcrumbs = array();

while ($parent_id) {

$page = get_page($parent_id);

$breadcrumbs[] = '
ID) . '">' . get_the_title($page->ID) . '
';

$parent_id	= $page->post_parent;

}

$breadcrumbs = array_reverse($breadcrumbs);

foreach ($breadcrumbs as $crumb) echo '' . $crumb . '' . $delimiter . '';

echo $before . get_the_title() . $after;



} elseif ( is_search() ) {

echo $before . 'Search results for "' . get_search_query() . '"' . $after;



} elseif ( is_tag() ) {

echo $before . 'Posts tagged "' . single_tag_title('', false) . '"' . $after;



} elseif ( is_author() ) {

global $author;

$userdata = get_userdata($author);

echo $before . 'Articles posted by ' . $userdata->display_name . $after;



} elseif ( is_404() ) {

echo $before . 'Error 404' . $after;

}



if ( get_query_var('paged') ) {

if ( is_category() || is_day() || is_month() || is_year() || is_search() || is_tag() || is_author() ) echo ' (';

echo '
' . __('Page') . ' ' . get_query_var('paged') . '
';

if ( is_category() || is_day() || is_month() || is_year() || is_search() || is_tag() || is_author() ) echo ')';

}



echo '
';



}

} // end breadcrumbs();

The portion of that function now being called into question is this:

	} elseif ( is_attachment() ) {

$parent_id  = $post->post_parent;

$breadcrumbs = array();

while ($parent_id) {

$page = get_page($parent_id);

$breadcrumbs[] = '
ID) . '">' . get_the_title($page->ID) . '
';

$parent_id	= $page->post_parent;

}

$breadcrumbs = array_reverse($breadcrumbs);

foreach ($breadcrumbs as $crumb) echo '' . $crumb . '' . $delimiter . '';

echo $before . get_the_title() . $after;

If the attachment belongs to a page, the breadcrumbs display perfectly.

However, if the attachment belongs to a post, the breadcrumbs omit the Category of that post, and only show as:

Home > Post Title > Attachment

What I want is:

Home > Category > Post Title > Attachment

… for attachments belonging to posts, and …

Home > Parent Page > Child Page > Attachment

… for attachments belonging to pages.

Does anyone have a clue how I might accomplish this?

[TheDoc]

Wow there is a lot going on there for breadcrumbs! Have you considered simply using a plugin and modifying it? I’ve had a lot of success with modifying this one: http://wordpress.org/extend/plugins/breadcrumb-navxt/

[mjcampagna]

I’d like to include the feature in my theme rather than relying on plugins. I’m open to new ideas, though.

[Author]

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