WooCommerce: Multiple recipients to "Processing Order" email

wc-multiple-recipients-to-processing-order-email

add_filter( 'woocommerce_email_recipient_customer_processing_order', 'prefix_add_recipients_to_processing_order_email', 10, 2 );
/**
 * @param string   $recipient The recipient email, usually the billing address email
 * @param WC_Order $order
 *
 * @return string
 */
function prefix_add_recipients_to_processing_order_email( $recipient, $order ) {
	// Add as many emails to the recipient as you want by separating them with ","

	// Add the emails in the array
	$emails = array(
		'ad@asddd.com',
		'admin@adminsssd.com',
	);

	if ( is_string( $recipient ) ) {
		$emails[] = $recipient;
	} elseif ( is_array( $recipient ) ) {
		$emails = array_merge( $emails, $recipient );
	}

	return implode( ',', $emails );
}