Ratchet\Session\Serialize\PhpHandler::unserialize PHP Method

    public function unserialize($raw)
    {
        $returnData = array();
        $offset = 0;
        while ($offset < strlen($raw)) {
            if (!strstr(substr($raw, $offset), "|")) {
                throw new \UnexpectedValueException("invalid data, remaining: " . substr($raw, $offset));
            }
            $pos = strpos($raw, "|", $offset);
            $num = $pos - $offset;
            $varname = substr($raw, $offset, $num);
            $offset += $num + 1;
            $data = unserialize(substr($raw, $offset));
            $returnData[$varname] = $data;
            $offset += strlen(serialize($data));
        }
        return $returnData;
    }