How to get category id on opencart 2 product page?

Question

opencart

I need to get the id of the parent category on the opencart 2 product page, as soon as I tried it did not work, any advice?

Answer 1

Nothing complicated:
catalog\controller\product\product.php
After the line

$category_info = $this->model_catalog_category->getCategory($category_id);

Add a line And output in the template
$data['category_id'] = $category_id;
<?php echo $category_id; ?>