Hello!

I’ve been trying for a while to insert variations for a product, from the error logs I’ve done, it looks like it inserts them, but when the function finishes, I get the error PHP Fatal error: Uncaught TypeError: html_entity_decode(): Argument #1 ($string) must be of type string, array given.
I’ve been trying to debug this for a whole day now, and to no luck. Sometimes I’ve gotten rid of this error, but then the variations don’t have the attributes.

Now I tried to see if the attributes actually are inserted into the variation using wc_get_product_variation_attributes(), but I get the error when it runs. So I’m guessing something is wrongly inserted, but I’m not sure what.

function insert_product_variations($post_id, $variations) {

    foreach ($variations as $index => $variation) {

        $variation_post = array(

            'post_title'   => 'Variation #' . ($index + 1) . ' of ' . count($variations) . ' for product #' . $post_id,

            'post_name'    => 'product-' . $post_id . '-variation-' . ($index + 1),

            'post_status'  => 'publish',

            'post_parent'  => $post_id,

            'post_type'    => 'product_variation',

            'guid'         => home_url() . '/?product_variation=product-' . $post_id . '-variation-' . ($index + 1)

        );

        $variation_post_id = wp_insert_post($variation_post);

        if (is_wp_error($variation_post_id)) {

            error_log('Failed to create variation: ' . $variation_post_id->get_error_message());

            continue;

        }

        $variation_obj = new WC_Product_Variation($variation_post_id);

        $variation_attributes = array();

        foreach ($variation['attributes'] as $attribute => $value) {

            $taxonomy = 'pa_' . sanitize_title($attribute);

            error_log('Processing taxonomy: ' . $taxonomy);

            if (!taxonomy_exists($taxonomy)) {

                register_taxonomy(

                    $taxonomy,

                    'product_variation',

                    array(

                        'hierarchical' => false,

                        'label'        => ucfirst($attribute),

                        'query_var'    => true,

                        'rewrite'      => array('slug' => sanitize_title($attribute)),

                    )

                );

            }

            if (!term_exists($value, $taxonomy)) {

                wp_insert_term($value, $taxonomy);

            }

            $term = get_term_by('name', $value, $taxonomy);

            $term_slug = sanitize_text_field($term->slug);

            error_log('Term slug: ' . $term_slug . ' for taxonomy: ' . $taxonomy);

            error_log('Variation attributes: ' . print_r($variation_attributes, true));

            wp_set_post_terms($post_id, $value, $taxonomy, true);

            error_log('Set post terms for taxonomy ' . $taxonomy . ': ' . print_r($value, true));

            $variation_attributes[$taxonomy] = sanitize_text_field($term_slug);

        }

        error_log('Variation attributes: '. print_r($variation_attributes, true));

        $variation_obj->set_attributes($variation_attributes);

        if (!empty($variation['regular_price'])) {

            $variation_obj->set_regular_price($variation['regular_price']);

        }

        if (!empty($variation['sale_price'])) {

            $variation_obj->set_sale_price($variation['sale_price']);

        }

        if (!empty($variation['stock_qty'])) {

            $variation_obj->set_stock_quantity($variation['stock_qty']);

            $variation_obj->set_manage_stock(true);

            $variation_obj->set_stock_status('instock');

        } else {

            $variation_obj->set_manage_stock(false);

        }

        $variation_obj->save();

        error_log('Variation #' . ($index + 1) . ' info: ' . print_r($variation_obj, true));

        error_log('Variation #' . ($index + 1) . ' attributes: ' . print_r($variation_obj->get_attributes(), true));

    }

    error_log('variation attributes after saving: ' . print_r(wc_get_product_variation_attributes($variation_post_id), true));

}