您可以使用switch语句根据类别id有条件地设置每个类别的价格。如下所示：

function df_add_ticket_surcharge( $cart_object ) {

    global $woocommerce;

    $spfee = 0.00; // Move the initialization outside of the loop

    foreach ( $cart_object->cart_contents as $key => $value ) {

        $proid = $value['product_id'];
        $quantiy = $value['quantity'];

        $terms = get_the_terms( $proid, 'product_cat' );

        $spcustomfee = 0.00;

        if ( $terms && ! is_wp_error( $terms ) ) {
            foreach ( $terms as $term ) {
                $catid = $term->term_id; // Get the id
                // Set each id to the fee you want to charge/
                switch ( $catid ) {
                    case 39:
                        $spcustomfee = 3.60;
                        break;
                    case 38:
                        $spcustomfee = 1.80;
                        break;
                    // Add more cases for other categories if needed
                }
            }

            $spfee += $quantiy * $spcustomfee;
        }
    }

    if ( $spfee > 0 ) {
        $woocommerce->cart->add_fee( 'Custom Fee', $spfee, true, 'standard' );
    }
}

add_action( 'woocommerce_cart_calculate_fees', 'df_add_ticket_surcharge' );

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