WC_Shipping::calculate_shipping_for_package() public WC 1.0

Calculate shipping rates for a package,

Calculates each shipping methods cost. Rates are stored in the session based on the package hash to avoid re-calculation every page load.

{} It's a method of the class: WC_Shipping{}

Return

Array|true|false. Nothing.

Usage

$WC_Shipping = new WC_Shipping();
$WC_Shipping->calculate_shipping_for_package( $package, $package_key );

$package(array)

Package of cart items.

$package_key(int)

Index of the package being calculated. Used to cache multiple package rates.

Code of WC_Shipping::calculate_shipping_for_package() WC Shipping::calculate shipping for package ^{WC 5.3.0}

<?php
public function calculate_shipping_for_package( $package = array(), $package_key = 0 ) {
	// If shipping is disabled or the package is invalid, return false.
	if ( ! $this->enabled || empty( $package ) ) {
		return false;
	}

	$package['rates'] = array();

	// If the package is not shippable, e.g. trying to ship to an invalid country, do not calculate rates.
	if ( ! $this->is_package_shippable( $package ) ) {
		return $package;
	}

	// Check if we need to recalculate shipping for this package.
	$package_to_hash = $package;

	// Remove data objects so hashes are consistent.
	foreach ( $package_to_hash['contents'] as $item_id => $item ) {
		unset( $package_to_hash['contents'][ $item_id ]['data'] );
	}

	// Get rates stored in the WC session data for this package.
	$wc_session_key = 'shipping_for_package_' . $package_key;
	$stored_rates   = WC()->session->get( $wc_session_key );

	// Calculate the hash for this package so we can tell if it's changed since last calculation.
	$package_hash = 'wc_ship_' . md5( wp_json_encode( $package_to_hash ) . WC_Cache_Helper::get_transient_version( 'shipping' ) );

	if ( ! is_array( $stored_rates ) || $package_hash !== $stored_rates['package_hash'] || 'yes' === get_option( 'woocommerce_shipping_debug_mode', 'no' ) ) {
		foreach ( $this->load_shipping_methods( $package ) as $shipping_method ) {
			if ( ! $shipping_method->supports( 'shipping-zones' ) || $shipping_method->get_instance_id() ) {
				/**
				 * Fires before getting shipping rates for a package.
				 *
				 * @since 4.3.0
				 * @param array $package Package of cart items.
				 * @param WC_Shipping_Method $shipping_method Shipping method instance.
				 */
				do_action( 'woocommerce_before_get_rates_for_package', $package, $shipping_method );

				// Use + instead of array_merge to maintain numeric keys.
				$package['rates'] = $package['rates'] + $shipping_method->get_rates_for_package( $package );

				/**
				 * Fires after getting shipping rates for a package.
				 *
				 * @since 4.3.0
				 * @param array $package Package of cart items.
				 * @param WC_Shipping_Method $shipping_method Shipping method instance.
				 */
				do_action( 'woocommerce_after_get_rates_for_package', $package, $shipping_method );
			}
		}

		// Filter the calculated rates.
		$package['rates'] = apply_filters( 'woocommerce_package_rates', $package['rates'], $package );

		// Store in session to avoid recalculation.
		WC()->session->set(
			$wc_session_key,
			array(
				'package_hash' => $package_hash,
				'rates'        => $package['rates'],
			)
		);
	} else {
		$package['rates'] = $stored_rates['rates'];
	}

	return $package;
}