Chuyển 0đ thành chữ “Liên hệ” trong woocommerce

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;
}
add_filter( 'woocommerce_get_price_html', 'devvn_wc_custom_get_price_html', 10, 2 );

function devvn_oft_custom_get_price_html( $price, $product ) {
    if ( !is_admin() && !$product->is_in_stock()) {
       $price = '<span class="amount">' . __( 'Liên hệ', 'woocommerce' ) . '</span>';
    }
    return $price;
}
add_filter( 'woocommerce_get_price_html', 'devvn_oft_custom_get_price_html', 99, 2 );