....
public function store(Request $request){
        $this->validate($request,[
            'nama'=>'required',
            'nisn'=>'required',
            'email'=>'required'
        ]);

        $data['name'] = $request->nama;
        $data['nisn'] = $request->nisn;
        $data['email'] = $request->email;
        $data['password'] = bcrypt('123');
        $data['id_registrasi'] = 'REG-'.date('YmdHis');

        //cek poto
        $file = $request->file('photo');
        if($file){
            $file->move('uploads',$file->getClientOriginalName());
            $data['photo'] = 'uploads/'.$file->getClientOriginalName();
        }

        User::insert($data);

        \Session::flash('berhasil','Pendaftaran berhasil dilakukan');

        return redirect('ppdb');
    }
....