Fatal error: Uncaught Error: Using $this when not in object context in D:\Server\Apache24\htdocs\zentaopms\module\api\view\ajaxgetdropmenu.html.php:23 Stack trace: #0 {main} thrown in D:\Server\Apache24\htdocs\zentaopms\module\api\view\ajaxgetdropmenu.html.php on line 23