public function ppkPost(Request $request)
 {
     $validation = Validator::make($request->all(), ['code' => 'required|min:2', 'name' => 'required', 'fullname' => 'required', 'address' => 'required', 'notel1' => 'required']);
     if ($validation->fails()) {
         Session::flash('error', 'Gagal. Kemaskini maklumat PPK gagal.');
         return redirect()->back();
     }
     $ppk = Ppk::findOrFail($request->id);
     $ppk->name = strtoupper($request->name);
     $ppk->fullname = strtoupper($request->fullname);
     $ppk->address = strtoupper($request->address);
     $ppk->notel1 = $request->notel1;
     $ppk->notel2 = $request->notel2;
     $ppk->fax = $request->fax;
     if ($ppk->save()) {
         Session::flash('success', 'Berjaya. Kemaskini rekod telah berjaya.');
     } else {
         Session::flash('error', 'Gagal. Kemaskini rekod telah gagal.');
     }
     return redirect()->back();
 }