Check for parent category

Question

Code below is designed for testing to see if current post is in a category that is an ancestor (child/grandchild/greatgrandchild etc) of cat number 526

$cats = wp_get_post_categories();
if (cat_is_ancestor_of($cats[0],526)) {
echo "yes this works" ;
}

Not sure why this isnt working but likely something stupidly simple....

TIA

Answer 1

The correct syntax of cat_is_ancestor_of is

cat_is_ancestor_of( $parent_cat_id, $child_cat_id );

Where:

$parent_cat_id: should be the id to check if this is the parent category, in your case it should be 526.

$child_cat_id: should be the id of the child category.