php - 在屏幕上下载显示垃圾

Question

我有用于从 mysql 数据库下载 pdf 文件的 PHP 代码。该代码在 firefox mozilla 和 google chrome 中运行良好，但在 IE 10 中却不行，它在屏幕上显示垃圾。我已经使用一些标头实用程序调试了代码以检查标头请求，似乎标头没有发送回用户代理（IE 浏览器），它只是空白。

<?php
ob_start();
$company =$_GET['company'];
if(isset($_GET['id']))
{
$id = intval($_GET['id']);
if($id <= 0)
{
die('The ID is invalid!');
}
else
{
$dbLink = new mysqli('localhost', 'sqldata', 'sqldata', 'balhaf');
if(mysqli_connect_errno())
{
die("MySQL connection failed: ". mysqli_connect_error());
}
$query = "SELECT mime, name, size, data FROM $company WHERE id = $id";
$result = $dbLink->query($query);
if($result)
{
if($result->num_rows == 1) {
$row = mysqli_fetch_assoc($result);
$size = $row['size'];
$filename = $row['name'];
$data = $row['data'];
$mime = $row['mime'];
ini_get('zlib.output_compression');
ini_set('zlib.output_compression', 'Off');
header('Content-Type: application/pdf');
while (@ob_end_clean());
header('Content-Disposition: attachment; filename='.($filename));
header('Content-Length:'.($size));
echo $data;
exit();
}
else
{
echo 'Error! No image exists with that ID.';
}
mysqli_free_result($result);
}
else
{
echo "Error! Query failed: <pre>{$dbLink->error}</pre>";
}
mysqli_close($dbLink);
}
}
else
{
echo 'Error! No ID was passed.';
}
?>