split-shipping-packages.php

add_filter( 'woocommerce_cart_shipping_packages', 'split_shipping_packages_shipping_class' );

function split_shipping_packages_shipping_class( $packages ) {
		// Reset the packages.
		$packages = array();

		// Special items.
		$special_items = array();
		$regular_items = array();

		// Sort free from regular
		foreach ( WC()->cart->get_cart() as $item ) {
			if ( $item['data']->needs_shipping() ) {
				if ( $item['data']->get_shipping_class() === 'free' ) {
					$special_items[] = $item;
				} else {
					$regular_items[] = $item;
				}
			}
		}

		// Put inside packages
		if ( $special_items ) {
			$packages[] = array(
				'ship_via' => array( 'free_shipping' ),
				'contents' => $special_items,
				'name'     => 'Free Shipping is available on these items',
				'contents_cost' => array_sum( wp_list_pluck( $special_items, 'line_total' ) ),
				'applied_coupons' => WC()->cart->applied_coupons,
				'destination' => array(
					'country' => WC()->customer->get_shipping_country(),
					'state' => WC()->customer->get_shipping_state(),
					'postcode' => WC()->customer->get_shipping_postcode(),
					'city' => WC()->customer->get_shipping_city(),
					'address' => WC()->customer->get_shipping_address(),
					'address_2' => WC()->customer->get_shipping_address_2(),
				),
			);
		}
		if ( $regular_items ) {
			$packages[] = array(
				'contents' => $regular_items,
				'name'     => 'Delivery Options',
				'contents_cost' => array_sum( wp_list_pluck( $regular_items, 'line_total' ) ),
				'applied_coupons' => WC()->cart->applied_coupons,
				'destination' => array(
					'country' => WC()->customer->get_shipping_country(),
					'state' => WC()->customer->get_shipping_state(),
					'postcode' => WC()->customer->get_shipping_postcode(),
					'city' => WC()->customer->get_shipping_city(),
					'address' => WC()->customer->get_shipping_address(),
					'address_2' => WC()->customer->get_shipping_address_2(),
				),
			);
		}

		$regular_items_total = $packages[1]['contents_cost'];
		if ( $regular_items_total >= 25 ) {
			$packages[1]['ship_via'] = array( 'free_shipping' );
		} else {
			$packages[1]['ship_via'] = array( 'flat_rate' );
		}

		if ( ! $special_items ) {
			unset( $packages[1] );
			$regular_items_total = $packages[0]['contents_cost'];
			if ( $regular_items_total >= 25 ) {
				$packages[0]['ship_via'] = array( 'free_shipping' );
			} else {
				$packages[0]['ship_via'] = array( 'flat_rate' );
			}
		}
		if ( ! $regular_items_total ) {
			unset( $packages[1] );
		}

		return $packages;

	}

// Rename new packages.
function rename_custom_shipping_package( $package_name, $i, $package ) {

		if ( ! empty( $package['name'] ) ) {
			$package_name = $package['name'];
		}
		return $package_name;
}