Get category used by custom post type

Jacob

I am fetching the category that is used by custom post type. We have many post types that use the default categories taxonomy. I am looking for a way to use the meta_query or similar solution to collect the category used by particular post type.

I am using the get_terms() function to get the categories.

$portfolio_categories = get_terms([ 
    'taxonomy' => "category", 
    'hide_empty' => true,
]);

morgan

You can't use the meta_query() in the get_term() function. But you can achieve the desired result by slightly modifying your codes.

First you need to fetch the post ids from desired custom post type.

$portfolio_ids = get_posts(
    array(
        'post_type' => 'portfolio',
        'posts_per_page' => -1,
        'fields' => 'ids', // return an array of ids
    )
);

Now use the collected ids with the get_term() function.

$portfolio_categories = get_terms([ 
    'taxonomy' => "category", 
    'object_ids' => $portfolio_ids, 
    'hide_empty' => true,
]);