Shipping Rates based on Product Quantity on woocommerce

I want to set shipping cost quantity wise on my woocommerce theme. I want to do this option :

For 1 to 5 products shiping cost will be 15%.
More than 5 products whipping cost will be $6.99 .

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Can i add this shipping option without a plugin ?

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3 comments

  1. You need to hook a function to woocommerce_calculate_totals action which is triggered right before calculating the final cart total. The woocommerce_calculate_totals action provides the WC_Cart instance, on which you can perform manipulation as per your requirement.

    add_action('woocommerce_calculate_totals', 'modify_shipping_totals');
    
    function modify_shipping_totals($cart) {
        if($cart->get_cart_contents_count() < 6) {
            $cart->shipping_total = ( 15/100 ) * $this->cart_contents_total; 
            // shipping cost will be 15% of cart content total
    
            // you may also want to modify the shipping tax.
    
            $cart->shipping_tax_total = 0; 
        } else {
            $cart->shipping_total = 6.99;
            $cart->shipping_tax_total = 0;
        }
    
    
    }
    

    For further reference regarding changable variables refer to WC_Cart documentation.

  2. // **Note**: This code is working only when you set Flat rate Settings 
    // cost value is 1
    
    add_filter( 'woocommerce_package_rates', 'custom_package_rates', 10, 2 );
     function custom_package_rates( $rates, $packages ) {
        if ( is_admin() && ! defined( 'DOING_AJAX' ) ) return;
        $cart_count = WC()->cart->get_cart_contents_count();
        $cart_total =  WC()->cart->cart_contents_total;
    
        foreach($rates as $rate_key => $rate_values ) {
            $method_id = $rate_values->method_id;
            $rate_id = $rate_values->id;
    
            if( $method_id == 'flat_rate' ){
                if( $cart_count < 99 ){
                    $flat_rate_value = 4.95; //"Applay Flat rate less then 99 quatity"
                    $cart_10_percent = 0; // No percent discount
                }   
                if( $cart_count > 99 ){
                    $flat_rate_value = 9.95; // "Applay Flat rate greater then 99 quatity"
                    $cart_10_percent = 0; // No percent discount
                }
                $rate_cost = $flat_rate_value > $cart_10_percent ? $flat_rate_value - $cart_10_percent : 0;
    
                // Set the new calculated rate cost
                $rates[$rate_id]->cost = number_format( $rates[$rate_id]->cost * $rate_cost, 2 );
    
            }
        }
        return $rates;
    } 
    
  3. The Pranav solution works if you call the add_action inside the init hook, like this:

    function init_shop(){
        add_action('woocommerce_calculate_totals', 'modify_shipping_totals', 10);
    }
    add_action( 'init', 'init_shop');
    

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