Failed to read blob data from sqlite

Question

i store blob data with php like this

$this->_db->exec"CREATE TABLE media (url TEXT, content BLOB)");

$fp = fopen($encoded['path'], 'rb');
$sql = "INSERT INTO media (url, content) VALUES (?, ?)";
$stmt = $this->_db->prepare($sql);
$stmt->bindValue(1, $encoded['url'], PDO::PARAM_STR);
$stmt->bindValue(2, $fp, PDO::PARAM_LOB);
$stmt->execute();
fclose($fp);

And in my c++ program (using bada framework) i read the data from blob column back. The problem is, when i use php on my localhost (version 5.3.2-1ubuntu4.2), my c++ app can recognize the blob column as blob type correctly. But when i use my remote host (php version 5.2.12) to create sqlite file, my c++ app recognizes the blob column as TEXT TYPE and my binary data is corrupted.

Does anyone know why and any work around?

Thanks