WC_Tax::get_shipping_tax_class_from_cart_items │ private static │ WC 1.0

Get the shipping tax class from the cart items.

Determines the appropriate tax class for shipping based on cart contents. Standard tax class takes priority, followed by the first non-standard class found in the configured tax class hierarchy.

Method of the class: WC_Tax{}

No Hooks.

Returns

string|null. The shipping tax class slug, or null if no taxable items are found.

Usage

$result = WC_Tax::get_shipping_tax_class_from_cart_items();

WC_Tax::get_shipping_tax_class_from_cart_items() WC Tax::get shipping tax class from cart items code ^{WC 11.2.2}

private static function get_shipping_tax_class_from_cart_items() {
	$standard_tax_class = '';
	$cart               = WC()->cart;

	// Check if cart has items before proceeding.
	if ( ! $cart->get_cart() ) {
		return $standard_tax_class;
	}

	$cart_tax_classes = $cart->get_cart_item_tax_classes_for_shipping();

	// No tax classes = no taxable items.
	if ( empty( $cart_tax_classes ) ) {
		return null;
	}

	// Standard tax class takes priority over any other tax class.
	if ( in_array( $standard_tax_class, $cart_tax_classes, true ) ) {
		return $standard_tax_class;
	}

	// If only one tax class, use it directly.
	if ( 1 === count( $cart_tax_classes ) ) {
		return reset( $cart_tax_classes );
	}

	// For multiple classes, use the first one found using the order defined in settings.
	static $tax_class_slugs = null;
	if ( null === $tax_class_slugs ) {
		$tax_class_slugs = self::get_tax_class_slugs();
	}

	foreach ( $tax_class_slugs as $tax_class_slug ) {
		if ( in_array( $tax_class_slug, $cart_tax_classes, true ) ) {
			return $tax_class_slug;
		}
	}

	// Default to standard tax class if nothing else matches.
	return $standard_tax_class;
}