ET 4.1: add customer email column to CSV export data

add-email-col_et-41.php

<?php
/**
 * Adds email and name columns to the attendee export data (CSV only).
 *
 * Filters via the tribe_events_tickets_attendees_csv_items hook; intended for use
 * with the initial 4.1 release of Event Tickets/Event Tickets Plus in combination
 * with WooCommerce only.
 *
 * @param  array $items
 * @return array
 */
function attendee_export_add_purchaser_email_name( $items ) {
	$count = 0;

	foreach ( $items as &$attendee_record ) {
		// Add the header columns
		if ( 1 === ++$count ) {
			$attendee_record[] = 'Customer Email Address';
			$attendee_record[] = 'Customer Name';
		}
		// Populate the new columns in each subsequent row
		else {
			// Assumes that the order ID lives in the first column
			$order = wc_get_order( (int) $attendee_record[0] );
			$attendee_record[] = $order->billing_email;
			$attendee_record[] = $order->billing_first_name . ' ' . $order->billing_last_name;
		}
	}

	return $items;
}

add_filter( 'tribe_events_tickets_attendees_csv_items', 'attendee_export_add_purchaser_email_name' );

Updated to add the customer name. Also now draws on the order's billing data, rather than the associated user account.