52

How can i get taxonomies of a post type?

If I have a post type event and i need to find out the list of taxonomies that are attached to that post type. How do I find them?

42

I think I've got it! After looking at couple of functions in the taxonomy.php file in WordPress I have found the function get_object_taxonomies(); which did the trick :)

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  • 2
    See this for more info: codex.wordpress.org/Function_Reference/get_object_taxonomies – Manny Fleurmond Jun 21 '11 at 13:15
  • wow... good to know about get_object_taxonomies(). it just helped me hijack template_redirect – helgatheviking Nov 10 '11 at 3:17
  • Hi thankx for this but how to order them by ID instead of NAME? – dh47 Oct 19 '15 at 7:08
  • easiest way will be just sort them using a for or foreach loop. – Sisir Oct 19 '15 at 9:25
  • Yes I am fetching using foreach loop but I am getting order by name $taxonomies = get_object_taxonomies( array( 'post_type' => $post_type ) ); foreach( $taxonomies as $taxonomy ) : // Gets every "category" (term) in this taxonomy to get the respective posts $terms = get_terms( $taxonomy ); ?> <ul class="specials"><?php foreach( $terms as $term ) : ?> <li><h2 ><?php echo $term->name; ?></h2> – dh47 Oct 19 '15 at 10:19
8

get_categories will do the job.

get_categories('taxonomy=taxonomy_name&type=custom_post_type'); 
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  • (I think if I understood the question right!) – addedlovely Jun 21 '11 at 11:46
  • 4
    Thing is i don't have any taxonomy name, that's what i want to find out. I only have the name of the post type. By the post type name i want to find out all the taxonomy that are attached to it. Thanks anyway! – Sisir Jun 21 '11 at 12:47
1

Have you tried anything? something like this?

<?php 

$args=array(
  'object_type' => array('event') 
); 

$output = 'names'; // or objects
$operator = 'and'; // 'and' or 'or'
$taxonomies=get_taxonomies($args,$output,$operator); 
if  ($taxonomies) {
  foreach ($taxonomies  as $taxonomy ) {
    echo '<p>'. $taxonomy. '</p>';
  }
}
?>
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  • 1
    Looked at get_taxonomies(); function on codex but it has very poor documentation and was no idea how i can pass the post types. – Sisir Jun 21 '11 at 9:56
  • Sorry, this code is returning all registered taxonomies in wordpress. – Sisir Jun 21 '11 at 9:59
1
$taxonomies = get_taxonomies( [ 'object_type' => [ 'custom_post_type' ] ] );
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1

Use get_object_taxonomies (https://developer.wordpress.org/reference/functions/get_object_taxonomies/), which takes either the name of your custom post type or a post object as the parameter:

$taxonomies = get_object_taxonomies('custom_post_type');
$taxonomies = get_object_taxonomies($custom_post_object);

get_taxonomies() won't return any taxonomies that are used by multiple post types (https://core.trac.wordpress.org/ticket/27918).

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0

Apologies for raising an old post, but I came across it while looking for an answer for my use case.

I wanted to retrieve all available taxonomies for a post type, and also retrieve all available terms per taxonomy.

Thank you to Nick B for setting me in the right direction with his answer: https://wordpress.stackexchange.com/a/357448/198353

// get a list of available taxonomies for a post type
$taxonomies = get_taxonomies(['object_type' => ['your_post_type']])

$taxonomyTerms = [];

// loop over your taxonomies
foreach ($taxonomies as $taxonomy)
{
  // retrieve all available terms, including those not yet used
  $terms    = get_terms(['taxonomy' => $taxonomy, 'hide_empty' => false]);

  // make sure $terms is an array, as it can be an int (count) or a WP_Error
  $hasTerms = is_array($terms) && $terms;

  if($hasTerms)
  {
    $taxonomyTerms[$taxonomy] = $terms;        
  }
}
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