Fatal error: Uncaught TypeError: usort(): Argument #1 ($array) must be of type array, null given in /home/www/web/www.steelhome.cn/app/master/masterAction.inc.php:2947 Stack trace: #0 /home/www/web/www.steelhome.cn/app/master/masterAction.inc.php(2947): usort(NULL, Object(Closure)) #1 /home/www/web/www.steelhome.cn/app/list/listAction.inc.php(33): masterAction->getColumnShowDataList('2=02=002,063|00...') #2 /home/www/web/www.steelhome.cn/app/list/listController.inc.php(25): listAction->index(Array) #3 /home/www/web/libs/frame/libs/controller/AbstractController.inc.php(185): listController->v_index(Array) #4 /home/www/web/www.steelhome.cn/list.php(10): AbstractController->processAndDisplay() #5 {main} thrown in /home/www/web/www.steelhome.cn/app/master/masterAction.inc.php on line 2947