创建数组嵌套PHP - Create array nested PHP

Hi-all'我有一个PHP页面，在那里我从服务器检索XML数据，并希望将这些数据存储到数组中。

这是我的代码：

foreach ($xml->DATA as $entry){
    foreach ($entry->HOTEL_DATA as $entry2){
        $id = (string)$entry2->attributes()->HOTEL_CODE;
        $hotel_array2 = array();
        $hotel_array2['id'] = $entry2->ID;
            $hotel_array2['name'] = utf8_decode($entry2->HOTEL_NAME);
        $i=0;
        foreach($entry2->ROOM_DATA as $room){
            $room_array = array();
            $room_array['id'] = (string)$room->attributes()->CCHARGES_CODE;
            $hotel_array2['rooms'][$i] = array($room_array);
            $i++;
        }
            array_push($hotel_array, $hotel_array2);
        }
}

在这种模式下，我有一个数组hotel_array，所有的酒店都有房间。问题是：在我的XML中，我可以有多个具有相同ID的酒店（同一家酒店），具有相同的信息，但房间不同。如果我有一个酒店已经插入到我的hotel_array中，我不想在其中插入新的阵列，但我只想将其房间阵列插入到现有的酒店中。示例现在我的情况是：

hotel_array{
      [0]{
           id = 1,
           name = 'test'
           rooms{
               id = 1
           }
      }
      [0]{
           id = 2,
           name = 'test2'
           rooms{
               id = 100
           }
      }
      [0]{
           id = 1,
           name = 'test'
           rooms{
               id = 30
           }
      }
}

我希望得到这样的结果：

hotel_array{
      [0]{
           id = 1,
           name = 'test'
           rooms{
               [0]{
                  id = 1
               }
               [1]{
                  id = 30
               }
           }
      }
      [0]{
           id = 2,
           name = 'test2'
           rooms{
               id = 100
           }
      }
}

如何创建这样的数组？

感谢

第一件事是在创建酒店id时，将其作为hotel_array上的索引。

foreach ($xml->DATA as $entry){
    foreach ($entry->HOTEL_DATA as $entry2){
        $id = (string)$entry2->attributes()->HOTEL_CODE;
        $hotel_array2 = array();
        $hotel_array2['id'] = $entry2->ID;
            $hotel_array2['name'] = utf8_decode($entry2->HOTEL_NAME);
        $i=0;
        foreach($entry2->ROOM_DATA as $room){
            $room_array = array();
            $room_array['id'] = (string)$room->attributes()->CCHARGES_CODE;
            $hotel_array2['rooms'][$i] = array($room_array);
            $i++;
        }
            if (!isset($hotel_array[$hotel_array2['id']])) {
                  $hotel_array[$hotel_array2['id']] = $hotel_array2;
            } else {
                  $hotel_array[$hotel_array2['id']]['rooms'] = array_merge($hotel_array[$hotel_array2['id']]['rooms'], $hotel_array2['rooms']);
            }
        }
}

虽然这与DevZer0（+1）的答案相似，但也可以做很多事情来简化工作。。。不需要将array_merge用作一个，也不需要在房间阵列中具体说明$i。

$hotels = array();
foreach ($xml->DATA as $entry){
  foreach ($entry->HOTEL_DATA as $entry2){
    $id = (string) $entry2->attributes()->HOTEL_CODE;
    if ( empty($hotels[$id]) ) {
      $hotels[$id] = array(
        'id' => $id,
        'name' => utf8_decode($entry2->HOTEL_NAME),
        'rooms' => array(),
      );
    }
    foreach($entry2->ROOM_DATA as $room){
      $hotels[$id]['rooms'][] = array(
        'id' => (string) $room->attributes()->CCHARGES_CODE;
      );
    }
  }
}

以防万一。。。

这是：）

$hotel_array = array();
foreach ($xml->DATA as $entry)
{
    foreach ($entry->HOTEL_DATA as $entry2)
    {
        $hotel_code = (string) $entry2->attributes()->HOTEL_CODE;
        if (false === isset($hotel_array[$hotel_code]))
        {
            $hotel = array(
                'id' => $entry2->ID,
                'code' => $hotel_code,
                'name' => utf8_decode($entry2->HOTEL_NAME)
            );
            foreach($entry2->ROOM_DATA as $room)
            {
                $hotel['rooms'][] = array(
                    'id' => (string)$room->attributes()->CCHARGES_CODE,
                );
            }
            $hotel_array[$hotel_code] = $hotel;
        }
    }
}