Php 从WooCommerce购物车和 checkout 页面自定义发货标签

我希望删除购物车和 checkout 页面中的发货标签值时，将该值分配给发货.例:-将"统一税率100.00美元"改为"100.00美元".这意味着我只需要不带标签文本的值.你能帮我做到这一点吗？

我在shipping_package_rates_filter_callback函数中更改为$rates[$targeted_rate_id]->label = '';.但它仍然在值的开头显示':'(冒号符号).例:-:100.00$.

shipping_package_rates_filter_callback个

add_filter( 'woocommerce_package_rates', 'shipping_package_rates_filter_callback', 100, 2 );
function shipping_package_rates_filter_callback( $rates, $package ) {
    // HERE define your targeted rate id
    $targeted_rate_id = 'flat_rate:4'; 
    
    if ( ! array_key_exists($targeted_rate_id, $rates) ) 
        return $rates;
    
    $new_cost = WC()->session->get('shipping_cost'); // Get new cost from WC sessions

    if ( ! empty($new_cost) ) {
        // Set shipping label empty
        $rates[$targeted_rate_id]->label = '';
        $rate = $rates[$targeted_rate_id];
        $cost = $rate->cost; // Set the initial cost in a variable for taxes calculations
        $rates[$targeted_rate_id]->cost = $new_cost; // Set the new cost

        $has_taxes = false; // Initializing
        $taxes     = array(); // Initializing
        foreach ($rate->taxes as $key => $tax_cost){
            if( $tax_cost > 0 ) {
                $tax_rate    = $tax_cost / $cost; // Get the tax rate conversion
                $taxes[$key] = $new_cost * $tax_rate; // Set the new tax cost in taxes costs array
                $has_taxes   = true; // There are taxes (set it to true)
            }
        }
        if( $has_taxes ) {
            $rates[$targeted_rate_id]->taxes = $taxes; // Set taxes costs array
        }
    } else {
        unset($rates[$targeted_rate_id]);
    }
    return $rates;
}