Gdn_Upload::isUpload PHP Method

Check to see whether the user has selected a file for uploading.

public isUpload ( $inputName ) : boolean
$inputName		The input name of the file.
return	boolean	Whether a file has been selected for the fiels.

    public function isUpload($inputName)
    {
        return val('name', val($inputName, $_FILES, '')) !== '';
    }

Gdn_Upload