woocommerce_order_update_coupon │ action-hook │ WC 1.0

Usage

add_action( 'woocommerce_order_update_coupon', 'wp_kama_woocommerce_order_update_coupon_action', 10, 3 );

/**
 * Function for `woocommerce_order_update_coupon` action-hook.
 * 
 * @param  $id      
 * @param  $item_id 
 * @param  $args    
 *
 * @return void
 */
function wp_kama_woocommerce_order_update_coupon_action( $id, $item_id, $args ){

	// action...
}

$id

-

$item_id

-

$args

-

Where the hook is called

do_action( 'woocommerce_order_update_coupon', $this->get_id(), $item->get_id(), $args );

Where the hook is used in WooCommerce