for some one trying to understand the table for kokonotsuba.
here is a hopeful self explanatory code. the right is the data from the database but as a table with keys matching what it would be in the database.

        $this->postID = $data['no'] ?? null;
        $this->threadID = $data['resto'] ?? null;
        $this->category = $data['category'] ?? null;

        $this->lastBumpTime = $data['root'] ?? null; // so it seems
        $this->utime = $data['time'] ?? null; //unix time stamp
        $this->time = $data['now'] ?? null; //time stamp but as string

        $this->md5chksum = $data['md5chksum'] ?? null; //file md5 hash
        $this->fileName = $data['fname'] ?? null;
        $this->fileExtension = $data['ext'] ?? null;
        $this->imgw = $data['imgw'] ?? null;// width
        $this->imgh = $data['imgh'] ?? null;// hight
        $this->imgsize = $data['imgsize'] ?? null;
        $this->tw = $data['tw'] ?? null;// thumbnail witdh
        $this->th = $data['th'] ?? null;// thumbnail hight
        $this->fileNameOnDisk = $data['tim'] ?? null;// its utime plus miliseconds at the end. i only found to use with filenames

        $this->password = $data['pwd'] ?? null;
        $this->name = $data['name'] ?? null;
        $this->email = $data['email'] ?? null;
        $this->subject = $data['sub'] ?? null;
        $this->comment = $data['com'] ?? null;
        $this->host = $data['host'] ?? null;
        $this->status = $data['status'] ?? null;