Displaying an image from a database

Displaying an image from a database

I have looked at most of the threads re this topic but I am still in the
dark! I understand that storing an image in a database is not best
practice but that's what I have. I have managed to upload the images no
problem but when I try to display them I get this message.
The image * cannot be displayed because it contains errors.
I have tested the code to see if the file is actually been selected by
echoing the file content and I get the pages of code relating to the image
but when I try to display the image using the header
(Content-type:image/jpeg) I get the above message. I am storing the image
as a longblob. This is my code
mysql_connect($host, $username, $password) or die("Can not connect to
database: ".mysql_error());
mysql_select_db($database) or die("Can not select the database:
".mysql_error());
$id = 3;
if(!isset($id) || empty($id) || !is_int($id)){
die("Please select your image!");
}else{
$query = mysql_query("SELECT image FROM images WHERE image_id='".$id."'")
or die(mysql_error());;
//echo $query;
$row = mysql_fetch_row($query);
$content = $row['image'];
header('Content-type: image/jpg');
echo $content;
}
?>
Any help much appreciated Thanks# Sarita