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1. smijos
   Member
   Posted 5 years ago #

   All I want is the parent category id for use with children. Here's what Kafkaesqui wrote a few months back

   <?php
   $cat_object = $wp_query->get_queried_object();
   $cat_parent = $cat_object->category_parent;
   ?>

   but then what do I do with that? I tried to echo &cat_parent but that did nothing - doesn't seem to matter whether I'm in or out of the loop

   this didn't work either
   

   $cat = get_the_category();
   if ($cat->cat_parent = 0) {
   $cat_parent = $cat->cat_ID;
   } else {
   $cat_parent = $cat->cat_parent;
   }
   echo $cat_parent;

2. muskote
   Member
   Posted 4 years ago #

   use this:

   <?php
   $cat_object = $wp_query->get_queried_object();
   $parentcat = ($cat_object->category_parent) ? $cat_object->category_parent : $cat;
   wp_list_cats("child_of=$parentcat");
   ?>

   it works perfect — on archive.php.

   any chance to get this working on single.php? i played around with this but had no luck.

3. sophiavancouver
   Member
   Posted 4 years ago #

   Try this: List children of current category.

4. Kafkaesqui
   Moderator
   Posted 4 years ago #

   None of this will work on a single post page.

   For that you'd have to collect it* through get_the_category(). Outside The Loop would involve this:
   

   <?php
   global $post;
   $categories = get_the_category();
   $category = $categories[0];
   $parent = ($category->category_parent) ? $category->category_parent : $category->cat_ID;
   wp_list_cats("child_of=$parent");
   ?>

   To alternate between single and category (archive) queries, something like this should do it:
   

   <?php
   if( is_single() ) {
   	global $post;
   	$categories = get_the_category();
   	$category = $categories[0];
   } else {
   	$category = $wp_query->get_queried_object();
   }
   $parent = ($category->category_parent) ? $category->category_parent : $category->cat_ID;
   
   if( $parent )
   	wp_list_cats("child_of=$parent");
   ?>

   * This is really meant for blogs with posts residing in just one category.

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