How to get grandparent of a given category

1 comment

1. You could write a simple function to do this each time you need to. Here’s an example I found on this website.

   function pa_category_top_parent_id( $catid ) {
       while( $catid ) {
           $cat = get_category( $catid ); // get the object for the catid
           $catid = $cat->category_parent; // assign parent ID (if exists) to $catid
           // the while loop will continue whilst there is a $catid
           // when there is no longer a parent $catid will be NULL so we can assign our $catParent
           $catParent = $cat->cat_ID;
       }
       return $catParent;
   }
   

   Then you can use this function anywhere like so:

   $catid = get_query_var( 'cat' );
   echo pa_category_top_parent_id( $catid );
   

   Reading the comments in the code it is pretty self-explanatory. Hope this helps.

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