How to get primary category set via Yoast seo plug

问题:

I have used a Yoast seo plugin and set primary category for product. But in front I cannot get primary category name.

回答1:

Hi you can get using postmeta table.

$primary_cat_id=get_post_meta($product->id,'_yoast_wpseo_primary_product_cat',true);
if($primary_cat_id){
   $product_cat = get_term($primary_cat_id, 'product_cat');
   if(isset($product_cat->name)) 
       echo $product_cat->name;
}

回答2:

I could not get the accepted answer to work. I modified this to fit my needs

$cat_name = ''; // I have this set in some shortcodes

if (!isset($cat_name) || $cat_name == '') {

  if ( class_exists('WPSEO_Primary_Term') ) {

    // Show the post's 'Primary' category, if this Yoast feature is available, & one is set. category can be replaced with custom terms

    $wpseo_primary_term = new WPSEO_Primary_Term( 'category', get_the_id() );

    $wpseo_primary_term = $wpseo_primary_term->get_primary_term();
    $term               = get_term( $wpseo_primary_term );

    if (is_wp_error($term)) {
        $categories = get_the_terms(get_the_ID(), 'category');
        $cat_name = $categories[0]->name;
    } else {
        $cat_name = $term->name;
    }

  } else {
    $categories = get_the_terms(get_the_ID(), 'category');
    $cat_name = $categories[0]->name;
  }
}

I have edited a working example to be more self contained, I used it for custom taxonomy so used get_the_terms() instead of get_the_category(). This code has not been tested in its current state.