WordPress at Your Fingertips
function is not described

WC_Cart::add_fee() public WC 1.0

Add additional fee to the cart.

This method should be called on a callback attached to the woocommerce_cart_calculate_fees action during cart/checkout. Fees do not persist.

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

No Hooks.

Return

null. Nothing.

Usage

$WC_Cart = new WC_Cart();
$WC_Cart->add_fee( $name, $amount, $taxable, $tax_class );
$name(string) (required)
Unique name for the fee. Multiple fees of the same name cannot be added.
$amount(float) (required)
Fee amount (do not enter negative amounts).
$taxable(true|false)
Is the fee taxable? (default: false).
Default: false
$tax_class(string)
The tax class for the fee if taxable. A blank string is standard tax class. (default: '').
Default: ''

Code of WC_Cart::add_fee() WC 5.6.0

public function add_fee( $name, $amount, $taxable = false, $tax_class = '' ) {
	$this->fees_api()->add_fee(
		array(
			'name'      => $name,
			'amount'    => (float) $amount,
			'taxable'   => $taxable,
			'tax_class' => $tax_class,
		)
	);
}