public function splitPdfInfo($pdfInfoArray)
    {
        $res = array();
        if (is_array($pdfInfoArray)) {
            foreach ($pdfInfoArray as $line) {
                $parts = explode(':', $line, 2);
                if (count($parts) > 1 && trim($parts[0])) {
                    $res[strtolower(trim($parts[0]))] = trim($parts[1]);
                }
            }
        }
        return $res;
    }