woocommerce_new_customer_note │ action-hook │ WC 1.0

Usage

add_action( 'woocommerce_new_customer_note', 'wp_kama_woocommerce_new_customer_note_action' );

/**
 * Function for `woocommerce_new_customer_note` action-hook.
 * 
 * @param  $array 
 *
 * @return void
 */
function wp_kama_woocommerce_new_customer_note_action( $array ){

	// action...
}

$array

-

Where the hook is called

do_action(
	'woocommerce_new_customer_note',
	array(
		'order_id'      => $this->get_id(),
		'customer_note' => $commentdata['comment_content'],
	)
);

Where the hook is used in WooCommerce