Notice: Constant IN_DISCUZ already defined in D:\net\x15\source\class\class_core.php on line 12

Notice: Constant DISCUZ_ROOT already defined in D:\net\x15\source\class\class_core.php on line 13

Notice: Constant DISCUZ_TABLE_EXTENDABLE already defined in D:\net\x15\source\class\class_core.php on line 15

Fatal error: Call to undefined function return_bytes() in D:\net\x15\source\class\discuz\discuz_application.php on line 97