How to show Saved longblob data including images from mysql convert into pdf

Hi ,

I am getting the problem to saved LongBlob data type to show in a PDF. HERE is my Coding

File imageUpload.php

<?php
// Connect to database
//set_time_limit(1300);
$errmsg = "";
if (! @mysql_connect("localhost","root","elephant")) {
        $errmsg = "Cannot connect to database";
        }
@mysql_select_db("test");

if(isset($_POST['upload']) && $_FILES['userfile']['size'] > 0)
{
$fileName = $_FILES['userfile']['name'];
$tmpName  = $_FILES['userfile']['tmp_name'];
$fileSize = $_FILES['userfile']['size'];
$fileType = $_FILES['userfile']['type'];

$fp      = fopen($tmpName, 'rb');
$content = fread($fp, filesize($tmpName));
$content = addslashes($content);
fclose($fp);

if(!get_magic_quotes_gpc())
{
    $fileName = addslashes($fileName);
}

$query = "INSERT INTO special (name, size, type, data) ".
"VALUES ('$fileName', '$fileSize', '$fileType', '$content')";

mysql_query($query) or die('Error, query failed');

//echo "<br>File $fileName uploaded<br>";
}

?>

<html><head>
<title>Upload an image to a database</title>
<body bgcolor=white><h2>Here's the latest picture</h2>
<form method="post" enctype="multipart/form-data">
<table width="350" border="0" cellpadding="1" cellspacing="1" class="box">
<tr>
<td width="246">
<input type="hidden" name="MAX_FILE_SIZE" value="2000000">

<input name="userfile" type="file" id="userfile">

</td>
<td width="80"><input name="upload" type="submit" class="box" id="upload" value=" Upload "></td>
</tr>
</table>
</form>

<?php

$query = "SELECT id,name,data FROM special";
$result = mysql_query($query) or die('Error, query failed');
if(mysql_num_rows($result) == 0)
{
//echo "Database is empty <br>";
}
else
{
while(list($id, $name,$data) = mysql_fetch_array($result))
{

echo "<img src='download.php?id=$id' width='200' height='200' />";



}
}

?>
</body>
</html>

and the other file is download.php

<?php

if (! @mysql_connect("localhost","root","elephant")) {
        $errmsg = "Cannot connect to database";
        }
@mysql_select_db("test");


if(isset($_GET['id']))
{

$id    = $_GET['id'];
$query = "SELECT name, type, size, data FROM special WHERE id = '$id'";

$result = mysql_query($query) or die('Error, query failed');
list($name, $type, $size, $content) = mysql_fetch_array($result);


header('Content-type: image/jpeg');
echo $content;

exit;


}

?>

If I use the following command in imageUpload.php

header("Content-type: application/pdf"); // add here more headers for diff. extensions
header("Content-Disposition: attachment; filename='hello.pdf'"); // use 'attachment' to force a download

echo "<img src='download.php?id=$id' width='200' height='200' />"; 

If I take the OUTPUT in browser its work fine but in PDF Its give me the Error!

Can any body help me in this matter.

Thanks