Fatal error: Uncaught Error: Undefined constant "AMFPHP_BASE" in /export/home/users/psadmin/apps/www/html/amfphp/core/amf/io/AMFSerializer.php:17 Stack trace: #0 {main} thrown in /export/home/users/psadmin/apps/www/html/amfphp/core/amf/io/AMFSerializer.php on line 17