wordpress get_the_category returns empty

Question

After a new comment is saved, I’m able to redirect via functions.php

add_filter(\'comment_post\', \'myredirect\');

I want to redirect to the product

Answer 1

I got it solved via get_the_terms using this snippet from WooCommerce - get category for product page

$terms = get_the_terms( $post_id, 'product_cat' );
foreach ($terms as $term) {
    $product_cat_id = $term->slug;
    break;
}

Foundit when i looked for product instead of post. :-)