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What is the best way to get the hierarchy of parent category objects from the category.php template, when there is no post as such.

The function get_category_parents() returns a string not the objects.

The function get_categories() seems to be intended for pages where there is a post because the type argument can take either post or link.

Is there any other function I am missing? I would need something that behaves exactly like get_category_parents() but I need the category objects not just a string of all of the names.

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I am not aware of a built in function that does what you are asking but it is not that hard to cook up. In fact, you are pretty close. get_categories is correct but it needs the child_of argument, which means finding the topmost parent via get_ancestors. child_of will only return children, not the specified parent, so that parent has to be inserted into the results manually.

var_dump(get_category_parents(5)); // reference
$anc = get_ancestors(5,'category');
$parent = array_pop($anc);
$hier[] = get_category($parent);
$args = array(
  'child_of' => $parent,
); 
array_push($hier,get_categories($args));
var_dump($hier);
| improve this answer | |
  • Thanks. What I did instead is that I used the parent property of the current category. If I call get_category($current_category->parent) recursively until I find one which has parent = 0, I suppose I will get all the hierarchy. Seems to be working unless there is a catch somewhere. – jbx Feb 2 '14 at 20:38
  • @jbx: you might compare the execution time of your code to this code. I honestly don't know which will be quicker. – s_ha_dum Feb 2 '14 at 20:47
  • WHat you describe, by the way, sounds a lot like what get_ancestors already does – s_ha_dum Feb 2 '14 at 20:55

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