Someone

        switch ($errno) {
            case UPLOAD_ERR_INI_SIZE:
                $msg = "Uploaded file exceeds INI limit";
                break;
            case UPLOAD_ERR_FORM_SIZE:
                $msg = "Uploaded file exceeds FORM limit";
                break;
            case UPLOAD_ERR_PARTIAL:
                $msg = "File uploaded partially";
                break;
            case UPLOAD_ERR_NO_FILE:
                $msg = "No file was uploaded";
                break;
            case UPLOAD_ERR_NO_TMP_DIR:
                $msg = "Tmp directory missing";
                break;
            case UPLOAD_ERR_CANT_WRITE:
                $msg = "Unable to write uploaded file to disk";
                break;
            case UPLOAD_ERR_EXTENSION:
                $msg = "Upload stopped by extension";
                break;

            case UPLOAD_ERR_OK:
            default:
                return;
        }