when i use $_FILES then not save in database but when use $_POST then its save whereas i used input type "file"

when I use $_FILES then not save in database but when use $_POST then its save whereas i used in input type="file". i want to upload image in my database and also in folder?

here is my code:

if(isset($_POST.submit)) {$id=$_POST.id;$name=$_POST.name;$email=$_POST.email;$type=$_POST.type;$mobile=$_POST.mobile;$file_name=$_POST.aadhar.name;$file_tmp=$_POST.aadhar.tmp_name;move_uploaded_file($file_tmp,"uploads/".$file_name);$description=$_POST.description;$tablename=$_POST.start;$query=query("select * from $tablename where id=$id");$row=$query->fetch_object();$amount=$row->rs;$package=$row->name;if($tablename=='plan_start') {$parent=1}else{$parent=2}$data1=array('name'=>$name,'email'=>$email,'mobile'=>$mobile,'aadhar'=>$file_name,'description'=>$description,'package'=>$package,'amount'=>$amount,'type'=>$type,'package_id'=>$id,'parent_id'=>$parent,);insert("packages",$data1);$last_id=last_insert_id();$_SESSION.last_id=$last_id}

via Chebli Mohamed