Upload Error: The filetype you are attempting to upload is not allowed.

[eluser]Cristian Gilè[/eluser]
From the userguide, the description for the file_name setting says:

If set CodeIgniter will rename the uploaded file to this name. The extension provided in the file name must also be an allowed file type.

Change your actual $config['file_name'] to:

Code:

$config['file_name'] = rand().time().get_extension($_FILES['image']['name']);

You can use a function like this to get the extension:

Code:

function get_extension($filename)
{
        $x = explode('.', $filename);
        return '.'.end($x);
}

Cristian Gilè