How can I read PNG Metadata from PHP?

Question

This is what I have so far:

Answer 1

$key";
       echo nl2br($val);

       fseek($fp, 4, SEEK_CUR);
    }
    else
    {
       fseek($fp, $data['length'] + 4, SEEK_CUR);
    }
  }


  fclose($fp);
?>

It assumes a basically well formed PNG file.