Question 183490 in Wordpress Question posted in
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WordPress – Add percentage increase to all WooCommerce shipping rates programmatically

I’m trying to add a 65% increase across all shipping methods.

I’ve used variations of this function but this doesn’t affect the rates that are returned.

function increase_shipping_costs() {
  // Get the current shipping rates
  $shipping_zones = WC_Shipping_Zones::get_zones();

  foreach ( $shipping_zones as $zone ) {
    foreach ( $zone['shipping_methods'] as $shipping_method ) {
      // Check if the shipping method is a flat rate
      if ( !$shipping_method->id === 'free_shipping' ) {
        // Get the current cost
        $current_cost = $shipping_method->cost;

        // Calculate the increased cost
        $increased_cost = $current_cost + ( $current_cost * 0.65 );

        // Update the shipping cost
        $shipping_method->cost = $increased_cost;
        $shipping_method->save();
      }
    }
  }
}

add_filter('woocommerce_package_rates', 'increase_shipping_costs', 10, 2);
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2

Answers


  1. 0

    The filter’s callback is not setup properly:

    • function parameters are missing
    • no value being returned (filters require a return value)

    You’ll want to use the data provided through the filter (ex: $package_rates) rather than WC_Shipping_Zones::get_zones().

    function increase_shipping_costs( $package_rates, $package ) {
    ...

    return $package_rates;
}
add_filter( 'woocommerce_package_rates', 'increase_shipping_costs', 10, 2 );
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  2. 0

    To add a 65% increase cost across all shipping methods rates, woocommerce_package_rates is the correct filter hook to be used, but you will need to modify mostly everything in your function to get it working properly (as there are some missing things and some mistakes in your code):

    add_filter('woocommerce_package_rates', 'increase_shipping_costs', 10, 2);
function increase_shipping_costs( $rates, $package ) {
    $rate_multiplier = 1.65; //  65% increase cost
    
    // Loop through shipping rates
    foreach ( $rates as $rate_key => $rate ) {
        
        if ( 'free_shipping' !== $rate->method_id && $rate->cost > 0 ) {
            $has_taxes = false; // Initializing
            $taxes     = array(); // Initializing

            $rates[$rate_key]->cost = $rate->cost * $rate_multiplier; // Set new rate cost
            
            // Loop through taxes array (change taxes rate cost if enabled)
            foreach ($rate->taxes as $key => $tax){
                if( $tax > 0 ){
                    $taxes[$key] = $tax * $rate_multiplier; // Set the new tax cost in the array
                    $has_taxes   = true; // Enabling tax changes
                }
            }
            // set array of shipping tax cost
            if( $has_taxes ) {
                $rates[$rate_key]->taxes = $taxes;
            }
        }
    }
    // For a filter hook, always return the main argument
    return $rates; 
}

    Code goes in functions.php file of the active child theme (or active theme). It should work.

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