如何做图片上传到mysql里？？

<?
if($submit)
{
   mysql_connect("myhost","user","password");
   mysql_select_db("myweb");$data=addslashes(fread(
    fopen($form_data,"r"),filesize($form_data)));$query="insert into picture
    (description,bin_data,filename,filesize,filetype)
     values('$form_description','$data','$form_data_name','$form_data_size','$form_data_type')";
$result=mysql_query($query);$id=mysql_insert_id();
echo "<p>文件已经上传至数据库，其ID为<b>$id<b>";
mysql_close();
}
>?