mysql图片存取问题

$filename = "menu.gif";
$fp = fopen($filename,"rb");
$picture = fread($fp,filesize($filename));
$picture = base64_encode($picture);
fclose($fp);


$conn=mysql_connect("localhost","root","dba");
mysql_select_db("admin",$conn);
$query="insert into image (filename,picture) values ('$filename','$picture')";
$result=mysql_query($query);
echo$id=mysql_insert_id();
$query="select * from image where id=1";
$result=mysql_query($query);
while($rows=mysql_fetch_array($result)){
    echo $rows['picture'];
}

我想用这个函数把menu.gif存入mysql数据库中但是结果是可以吧图片存进去但是却无法读出来，是读取图片不是这个函数还是我的函数写错了，请指教。。。。。。