Warning: Undefined array key "file" in C:\workspace\web\download.php on line 5

Warning: fopen(C:/workspace/web/download/): Failed to open stream: No such file or directory in C:\workspace\web\download.php on line 40

Fatal error: Uncaught TypeError: fread(): Argument #1 ($stream) must be of type resource, bool given in C:\workspace\web\download.php:57 Stack trace: #0 C:\workspace\web\download.php(57): fread(false, 8192) #1 {main} thrown in C:\workspace\web\download.php on line 57