public function profile_user(){
        $data = array();



        $user_status = 1;
        $id_siswa   = $this->input->post('id_siswa');


        $namafile = "";
        if(!empty($_FILES['userfile'])){
            $hasil = $this->upload_transfer('avatar');

            if($hasil['result'] == 'false'){
                $data['result'] = 'false';
                $data['msg'] = $hasil['msg'];

                echo json_encode($data);
                return;
            }else{
                $namafile = $hasil['namafile'];

            }
        }



        $simpan['id_siswa'] = $id_siswa;
        $simpan['user_avatar'] = $namafile;

        $simpan['user_status'] = $user_status;

        $status = $this->db->update('tb_siswa',$simpan);

        if($status){
            $data['result'] = 'true';
            $data['namafile'] = $namafile;
            $data['msg'] = 'Upload Profile Berhasil';
        }else{
            $data['result'] = 'false';
            $data['msg'] = 'Upload Profile Gagal';
        }

        #pre($this->db->last_query());
        echo json_encode($data);
    }

    public function upload_transfer($folder = 'produk', $size = 3000000)
    {
        $data = array();
        $folder = 'img/'.$folder.'/';

        $filename = $_FILES["userfile"]["name"];
        $file_basename = substr($filename, 0, strripos($filename, '.')); // get file extention
        $file_ext = substr($filename, strripos($filename, '.')); // get file name
        $filesize = $_FILES["userfile"]["size"];
        $allowed_file_types = array('.jpg','.png');

        if (in_array($file_ext,$allowed_file_types) && ($filesize < $size))
        {
            // Rename file
            buatDir($folder);
            $newfilename = md5($file_basename.date('YmdHis')) . $file_ext;
            if (file_exists($folder . $newfilename))
            {
                // file already exists error
                $data['result'] = "false";
                $data['msg'] = "File / nama file sudah ada diserver";
            } else  {
                if(move_uploaded_file($_FILES["userfile"]["tmp_name"], $folder . $newfilename)){
                    $data['result'] = "true";
                    $data['namafile'] = $newfilename;
                    $data['msg'] = "Upload file berhasil.";
                }else{
                    $data['result'] = "false";
                    $data['msg'] = "Upload File Gagal, Silahkan coba lagi";
                }

            }
        }elseif (empty($file_basename)){
            $data['result'] = "false";
            $data['msg'] = "Silahkan Pilih File untuk diupload, Silahkan coba lagi";
        }elseif ($filesize > $size){
            $data['result'] = "false";
            $data['msg'] = "Ukuran file Terlalu besar max 1MB, Silahkan coba lagi";
        }else{
            // file type error
            unlink($_FILES["file"]["tmp_name"]);

            $data['result'] = "false";
            $data['msg'] = "File yang diupload harus berektensi ".implode(', ',$allowed_file_types);
        }

        return $data;
    }