從其他函數訪問變量LARAVEL

Question

我試圖將函數的返回結果用於另一個函數。這是我的第一個功能：

public function availableRooms(){ 
    if(isset($_POST['selectedDate'])){ 
     $checkInDateReceived = str_replace('/', '-', $_POST['selectedDate']); 
     $checkInDate = date('Y-m-d', strtotime($checkInDateReceived)); 
     $availableRooms = DB::table('rooms') 
      ->leftJoin('reservations', function ($secondJoin) use($checkInDate) { 
       $secondJoin->where('reservations.checkout_date', '<', $checkInDate); 
      }) 
      ->leftJoin('reservation_room_rel', function ($firstJoin) { 
       $firstJoin 
        ->on('reservation_room_rel.room_id', '=', 'rooms.id') 
        ->on('reservation_room_rel.reservation_id', '=', 'reservations.id'); 
      }) 
      ->where([ 
       ['rooms.status', '=', 1] 
      ]) 
      ->whereNull('reservation_room_rel.room_id') 
      ->get(); 
     return $availableRooms; 
    } 
} 

這裏是我的第二個功能：

public function returnAddReservation(){ 
    $availableRoomsRet = $this->availableRooms(); 
    $mealSupplement = new Meal; 
    $accommodationSupplement = new AccommodationSupplement; 

    $accommodationSupplements = $accommodationSupplement::where('status', 1) 
     ->orderBy('name', 'asc') 
     ->get(); 
    $mealSupplements = $mealSupplement::where('status', 1) 
     ->orderBy('name', 'asc') 
     ->get(); 
    return view('addReservation', [ 
     'availableRooms' => $availableRoomsRet, 
     'accommodationSupplements' => $accommodationSupplements, 
     'mealSupplements' => $mealSupplements 
    ]); 
} 

首先函數返回正確的結果，如果它獨立運行，但是，當我dd($availableRoomsRet)返回null。 任何想法如何正確訪問$availableRooms從public function availableRooms()到public function returnAddReservation()？ 謝謝！

Answer 1

只要你在同一個班級，你應該得到它的價值，它與Laravel的純粹的PHP沒有任何關係。

，你可以這樣做

public function availableRooms(){ 
    $availableRooms = 15; 
    return $availableRooms; 
} 

public function returnAddReservation(){ 
    var_dump('inside class'. $this->availableRooms()); 
    $availableRoomsRet = $this->availableRooms(); 
    return $availableRoomsRet; 
} 

public function thirdfunction(){ 
    var_dump('inside third function' . $this->returnAddReservation()); 
}