PHP 및 PDO: 데이터베이스에서 바이너리 데이터를 처리하는 방법

$dsn = 'mysql:host=localhost;dbname=mydb';
$username = 'username';
$password = 'password';

try {
    $pdo = new PDO($dsn, $username, $password);
    $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    echo "Connected to database successfully";
} catch (PDOException $e) {
    echo "Connection failed: " . $e->getMessage();
}

$query = "SELECT photo_data FROM photos WHERE id = :id";
$stmt = $pdo->prepare($query);
$stmt->bindParam(':id', $id);
$stmt->execute();
$result = $stmt->fetch(PDO::FETCH_ASSOC);

$photoData = $result['photo_data'];

// 输出二进制数据
header('Content-Type: image/jpeg');
echo $photoData;

$photoData = file_get_contents('path/to/photo.jpg');

$query = "INSERT INTO photos (photo_data) VALUES (?)";
$stmt = $pdo->prepare($query);
$stmt->bindParam(1, $photoData, PDO::PARAM_LOB);
$stmt->execute();

echo "Photo data inserted into database successfully";

$photoData = file_get_contents('path/to/new_photo.jpg');

$query = "UPDATE photos SET photo_data = ? WHERE id = ?";
$stmt = $pdo->prepare($query);
$stmt->bindParam(1, $photoData, PDO::PARAM_LOB);
$stmt->bindParam(2, $id);
$stmt->execute();

echo "Photo data updated successfully";

$query = "DELETE FROM photos WHERE id = :id";
$stmt = $pdo->prepare($query);
$stmt->bindParam(':id', $id);
$stmt->execute();

echo "Photo data deleted successfully";