remove categories from product

Question

Is is possible to remove all the categories from a product in WooCommerce?

I have written a script which is run every time when a product is added/updated via WP-All-Import, but there are some wrong categories on the products, which I want to clean, deleting all the categories or products is not an option, so I want clear the categories on the products and let my script decide which categories to add to this product.

Answer 1

I have found the solution, actually it is very simple:

$terms = get_the_terms($product_id, 'product_cat');
foreach($terms as $term){
    wp_remove_object_terms($product_id, $term->term_id, 'product_cat');
}

This code get all the therms with the 'product_cat' taxonomy, with a foreach loop I remove all the items.

Answer 2

You could wipe all terms from a product using the wp_set_post_terms function. Setting the append argument to false ensures that all terms are overwritten.

For example:

wp_set_post_terms( $product_id, array(), 'product_cat', false );

More information on the wp_set_post_terms function: https://developer.wordpress.org/reference/functions/wp_set_post_terms/