Woocommerce shipping cost based on item quantity for specific shipping class

Question

I posted this code a few hours ago. I managed to get through one of the issues, but i have only one question now. This code works well but I need to multiply the cost for every single item using an specific shipping class and then add it to the regular shipping cost.

Example if I have 5 products in the cart:

• 2 of them use shipping-class-1 ($70 extra shipping cost for product)
• 3 of them use shipping-class-2 ($50 extra shipping cost for product)

So if (for example) the regular shipping costs $120 then the shipping should be ($120 + $290) = $410

add_filter( 'woocommerce_package_rates', 'ph_add_extra_cost_based_on_shipping_class', 10, 2);
if( ! function_exists('ph_add_extra_cost_based_on_shipping_class') ) {
    function ph_add_extra_cost_based_on_shipping_class( $shipping_rates, $package ){

        $handling_fee_based_on_shipping_class = array(
            array(
                'shipping_classes'  =>  array( 'shipping-class-1'),         // Shipping Class slug array
                'adjustment'        => 70,                                  // Adjustment
            ),
            array(
                'shipping_classes'  =>  array( 'shipping-class-2' ),
                'adjustment'        =>  50,
            ),
        );

        $shipping_method_ids = array( 'cologistics-shipping' );     // Shipping methods on which adjustment has to be applied

        $adjustment = null;
        foreach( $package['contents'] as  $line_item ) {
            $line_item_shipping_class = $line_item['data']->get_shipping_class();
            if( ! empty($line_item_shipping_class) ) {
                foreach( $handling_fee_based_on_shipping_class as $adjustment_data ) {
                    if( in_array( $line_item_shipping_class, $adjustment_data['shipping_classes']) ) {
                        $adjustment = ( $adjustment_data['adjustment'] > $adjustment ) ? $adjustment_data['adjustment'] : $adjustment;
                    }
                }
            }
        }

        if( ! empty($adjustment) ) {
            foreach( $shipping_rates as $shipping_rate ) {
                $shipping_method_id = $shipping_rate->get_method_id();
                if( in_array($shipping_method_id, $shipping_method_ids) ) {
                    $shipping_rate->set_cost( (float) $shipping_rate->get_cost() + $adjustment );
                }
            }
        }

        return $shipping_rates;
    }
}

I will really appreciate your help.

Thanks in advance!

Answer 1

This doesn't require any code normally… You should set your shipping method as follow (so first remove your code and save):

1) So you will keep 120 as global cost in your shipping method.

2) Then for each related desired shipping class you will add in the corresponding field:

• [qty]*70 for shipping-class-1
• [qty]*50 for shipping-class-2
• Calculation type: Per class: Charge shipping for each shipping class individually

This will work and will add to the cost an amount by chipping class based on cart item quantity.

---

For a custom shipping method based on your code, you should use the following to handle item quantity:

add_filter( 'woocommerce_package_rates', 'ph_add_extra_cost_based_on_shipping_class', 10, 2);
if( ! function_exists('ph_add_extra_cost_based_on_shipping_class') ) {
    function ph_add_extra_cost_based_on_shipping_class( $shipping_rates, $package ){

        $handling_fee_based_on_shipping_class = array(
            array(
                'shipping_classes'  =>  array( 'shipping-class-1'),         // Shipping Class slug array
                'adjustment'        => 70,                                  // Adjustment
            ),
            array(
                'shipping_classes'  =>  array( 'shipping-class-2' ),
                'adjustment'        =>  50,
            ),
        );

        $shipping_method_ids = array( 'cologistics-shipping' );     // Shipping methods on which adjustment has to be applied

        $adjustment = 0;

        foreach( $package['contents'] as  $line_item ) {
            $line_item_shipping_class = $line_item['data']->get_shipping_class();
            if( ! empty($line_item_shipping_class) ) {
                foreach( $handling_fee_based_on_shipping_class as $adjustment_data ) {
                    if( in_array( $line_item_shipping_class, $adjustment_data['shipping_classes']) ) {
                        $adjustment += $adjustment_data['adjustment'] * $line_item['quantity'];
                    }
                }
            }
        }

        if( $adjustment > 0 ) {
            foreach( $shipping_rates as $shipping_rate ) {
                $shipping_method_id = $shipping_rate->get_method_id();
                if( in_array($shipping_method_id, $shipping_method_ids) ) {
                    $shipping_rate->set_cost( (float) $shipping_rate->get_cost() + $adjustment );
                }
            }
        }

        return $shipping_rates;
    }
}

It should work handling car item quantity additional cost…

Don't forget to refresh shipping methods going to shipping settings, then disable/save and re-enable/save any shipping method in the related shipping zone.

Other answer threads related to woocommerce_package_rates hook.