Warning: Undefined array key "mkey" in C:\inetpub\wwwroot\ja\product\item.php on line 11

Fatal error: Uncaught TypeError: array_multisort(): Argument #1 ($array) must be an array or a sort flag in C:\inetpub\wwwroot\ja\product\item.php:32 Stack trace: #0 C:\inetpub\wwwroot\ja\product\item.php(32): array_multisort() #1 {main} thrown in C:\inetpub\wwwroot\ja\product\item.php on line 32