WordPress at a glance
function is not described

Automattic\WooCommerce\Admin\API\Reports\Orders

Controller::_get_coupons() protected WC 1.0

Get coupons column export value.

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

No Hooks.

Return

String. Nothing.

Usage

// protected - for code of main (parent) or child class
$result = $this->_get_coupons( $coupons );
$coupons(array) (required)
Coupons from report row.

Code of Controller::_get_coupons() WC 5.3.0

<?php
protected function _get_coupons( $coupons ) {
	return implode( ', ', wp_list_pluck( $coupons, 'code' ) );
}