Convert array in JSON

hi Pierre

Could you test this code ?
thanks, Alex

add_filter( "woe_json_output_filter", function($json, $record, $formatter){
	$record['others'] =  woe_get_order_others(WC_Order_Export_Engine::$order_id); // EDIT key 
	if ( $formatter->mode == 'preview' ) 
		$flags = JSON_UNESCAPED_SLASHES | JSON_PRETTY_PRINT ;
	else
		$flags = JSON_UNESCAPED_SLASHES;
	return json_encode($record,$flags);	
},10,3);

function woe_get_order_others($order_id) {
	global $wpdb;
	$results = array();
	$types = array( 'fee'=>'_fee_amount', 'shipping'=>'cost', 'tax'=>'tax_amount');
	
	foreach($types as $type=>$key) {
		$items = $wpdb->get_results("SELECT items.order_item_name, itemmeta.meta_value FROM {$wpdb->prefix}woocommerce_order_items items
				INNER JOIN  {$wpdb->prefix}woocommerce_order_itemmeta itemmeta
				ON items.order_item_id = itemmeta.order_item_id AND itemmeta.meta_key = '$key'
				WHERE items.order_id = $order_id  AND items.order_item_type = '$type'"
				);
		foreach($items as $item)		
			$results[ $item->order_item_name ] = $item->meta_value;
	}	
	return $results;
}