public function students()
 {
     $promos = Promo::all();
     //Table input
     $select_year = array();
     foreach ($promos as $promo) {
         $select_year[$promo->year] = 'Promotion ' . $promo->year;
     }
     return view('pages.students', compact('promos', 'select_year'));
 }
 /**
  * Remove the specified resource from storage.
  *
  * @param  int  $id
  * @return \Illuminate\Http\Response
  */
 public function destroy($id)
 {
     $promo = Promo::findOrFail($id);
     $promo->delete();
     return redirect('admin/Promo');
 }
 /**
  * Show the form for editing the specified resource.
  *
  * @param  int  $id
  * @return \Illuminate\Http\Response
  */
 public function edit($id)
 {
     $promos = Promo::orderBy('year')->pluck('year', 'id');
     $student = Student::findOrFail($id);
     return view('admin.student.edit', compact('student', 'promos'));
 }