Ciao a tutti.. devo fare un semplice script che mi visualizza l'immagine presentenel db mysql

Ecco la tabella "immagini"

ecco lo script

Codice PHP:
<?
  include 'config.php';
  $id=$_POST['id'];
 
  $sql = "SELECT id,type,immagine FROM immagini WHERE id='$id'";
  $result = @mysql_query($sql) or die(mysql_error ());
  $row = mysql_fetch_array($result);
  $id_img = $row['id'];
  $type = $row['type'];
  $img = $row['immagine'];
  if (!$id_img)
  {
    echo "Id sconosciuto";
  }else{
  
$filesize = strlen($img);

header('Content-type: '.$type);
header('Content-Length: '.$filesize);
header('Content-Disposition: inline; filename="'.$filename.'"');  
 
    echo $img;
  }
 
?>
mi si visualizza l'immagine in caratteri esadecimali... coma mai?
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