woocommerce_cart_totals_coupon_label filter-hook . WC 1.0

translators: %s: coupon code

Usage

add_filter( 'woocommerce_cart_totals_coupon_label', 'filter_function_name_3585', 10, 2 );
function filter_function_name_3585( $sprintf, $coupon ){
	// filter...

	return $sprintf;
}

$sprintf

-

$coupon

-

Where the hook is called

$label = apply_filters( 'woocommerce_cart_totals_coupon_label', sprintf( esc_html__( 'Coupon: %s', 'woocommerce' ), $coupon->get_code() ), $coupon );

Where in WP core the hook is used WooCommerce