WC_Cart::calculate_shipping │ public │ WC 1.0

Uses the shipping class to calculate shipping then gets the totals when its finished.

Method of the class: WC_Cart{}

No Hooks.

Returns

Array.

Usage

$WC_Cart = new WC_Cart();
$WC_Cart->calculate_shipping();

WC_Cart::calculate_shipping() code WC 10.7.0

woocommerce/includes/class-wc-cart.php 
public function calculate_shipping() {
	// Reset totals.
	$this->set_shipping_total( 0 );
	$this->set_shipping_tax( 0 );
	$this->set_shipping_taxes( array() );
	$this->shipping_methods        = array();
	$this->has_calculated_shipping = false;

	if ( ! $this->needs_shipping() || ! $this->show_shipping() ) {
		return $this->shipping_methods;
	}

	$this->has_calculated_shipping = true;
	$this->shipping_methods        = $this->get_chosen_shipping_methods( WC()->shipping()->calculate_shipping( $this->get_shipping_packages() ) );

	$shipping_costs = wp_list_pluck( $this->shipping_methods, 'cost' );
	$shipping_taxes = wp_list_pluck( $this->shipping_methods, 'taxes' );
	$merged_taxes   = array();
	foreach ( $shipping_taxes as $taxes ) {
		foreach ( $taxes as $tax_id => $tax_amount ) {
			$merged_taxes[ $tax_id ] = ( $merged_taxes[ $tax_id ] ?? 0 ) + $tax_amount;
		}
	}

	$this->set_shipping_total( array_sum( array_filter( $shipping_costs ) ) );
	$this->set_shipping_tax( array_sum( $merged_taxes ) );
	$this->set_shipping_taxes( $merged_taxes );

	return $this->shipping_methods;
}