ดาวโหลดไฟล์ภาพแล้วกดเปิดขึ้น it tooks like we don support this file format

<a href="download.php?pic='.$row['Img'].'">ดาวน์โหลด</a>

$pic = $_GET['pic'];
$stmt = $conn->prepare("SELECT Img, DocuNo FROM SOHDOrderRemark LEFT JOIN SOHD ON SOHD.SOID=SOHDOrderRemark.SOID WHERE SOHDOrderRemark.Img = ?");
$params = array($pic);
$stmt->execute($params);
$row = $stmt->fetch(PDO::FETCH_ASSOC);

// Set the HTTP headers for the image file download
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename="' . $row['Img'] . '"');
header('Content-Length: ' . strlen($row['Img']));

// Output the image data
echo $row['Img'];