// Chuyển 0đ thành liên hệ function devvn_wc_custom_get_price_html($price,$product){if (! $product->get_price()){if ($product->is_on_sale() && $product->get_regular_price()){$regular_price=wc_get_price_to_display($product,array('qty'=>1,'price'=>$product->get_regular_price()));$price=wc_format_price_range($regular_price,__('Free!','woocommerce'))}else{$price='<span class="amount">' . __('Liên hệ','woocommerce') . '</span>'}}return $price}