Laravel多个可选参数不起作用，URL中有两个反斜杠

Question

这是我的路线：

Route::get('/edit_atten/{id}/{date}/{c_in?}/{c_out?}', 'AttendanceController@editAttendance');

http://127.0.0.1:8000/edit_atten/31/2017-03-20//12:25:30

 public function editAttendance($id, $date, $c_in=null, $c_out=null)
{
    $this_user = Attendance::find($id);

    $this_user->check_in = $c_in;
    $this_user->check_out = $c_out;


    $this_user->save();

    echo "Success";

}

在这里， c_in ＆amp; c_out 是可选参数。如果我只提交 c_out ，则网址会显示如下：http://127.0.0.1:8000/edit_atten/31/2017-03-20//12:25:30它会产生路线问题。因为URL中显示了两个斜杠（//）！虽然这个（ c_in ）参数是可选的，为什么要显示这个？

这些解决方案？

Answer 1

Route::get('/edit_atten', 'AttendanceController@editAttendance');

http://127.0.0.1:8000/edit_atten?id=31&date2017-03-20&c_out=12:25:30

public function editAttendance(Request $request)
{
  $id = $request->input('id');
  $date = $request->input('date');
  $c_in = $request->input('c_in');
  $c_out = $request->input('c_out');

  $this_user = Attendance::find($id);
  $this_user->check_in = $c_in;
  $this_user->check_out = $c_out;
  $this_user->save();

  echo "Success";
}