complex multidimentional associative array process with foreach

问题

I've had to ask this one again, sorry, but I'm having a problem trying to process this array. I have tried several different ways but none where right, here's the array:

Array ( 
  [search] => Array ( 
    [response] => Array ( 
      [errors] => 
      [number_of_hotels] => 1 of 1 
    ) 
    [lr_rates] => Array ( 
      [hotel] => Array  ( 
        [hotel_ref] => 3116 
        [hotel_currency] => [U] => USD 
        [hotel_rooms] => Array ( 
          [room] => Array ( 
            [ref] => 6382 
            [type] => 1 
            [type_description] => Standard 
            [sleeps] => 8 
            [rooms_available] => 
            [adults] => 8 
            [children] => 
            [breakfast] => false 
            [dinner] => false 
            [description] => 
            [alternate_description] => 
            [rack_rate] => 82.01 
            [date] => 19/08/201220/08/201221/08/2012
            [numeric_hotelcurrencyprice] => FullFullFull
            [formatted_date] => 19 August 201220 August 201221 August 2012 
            [price] => FullFullFull
            [hotelcurrencyprice] => FullFullFull 
            [numeric_price] => FullFullFull
            [requested_currency] => GBPGBPGBP 
            [numeric_hotelcurrencyprice] => FullFullFull
            [available_online] => false 
            [minimum_nights] => 1 
            [bed_type] => 
            [cancellation_policy] => 
            [cancellation_days] => 
            [cancellation_hours] => 
            [room_terms] => 
          )
          [room] => Array ( 
            [ref] => 6382 
            [type] => 1 
            [type_description] => Standard 
            [sleeps] => 8 
            [rooms_available] => 
            [adults] => 8 
            [children] => 
            [breakfast] => false 
            [dinner] => false 
            [description] => 
            [alternate_description] => 
            [rack_rate] => 82.01 
            [date] => 19/08/201220/08/201221/08/2012
            [numeric_hotelcurrencyprice] => FullFullFull
            [formatted_date] => 19 August 201220 August 201221 August 2012 
            [price] => FullFullFull
            [hotelcurrencyprice] => FullFullFull 
            [numeric_price] => FullFullFull
            [requested_currency] => GBPGBPGBP 
            [numeric_hotelcurrencyprice] => FullFullFull
            [available_online] => false 
            [minimum_nights] => 1 
            [bed_type] => 
            [cancellation_policy] => 
            [cancellation_days] => 
            [cancellation_hours] => 
            [room_terms] => 
          )
        ) 
        [cancellation_type] => First Night Stay Chargeable 
        [cancellation_policy] => 2 Days Prior to Arrival 

        [CityTax] => Array ( 
          [TypeName] => 
          [Value] => 
          [OptedIn] => 
          [IsCityTaxArea] => 
        )
      )
    )
  ) 
)

Ok, I need to traverse the array and create a loop, so for every instance of ROOM it will repeat the process. Then i need to extract the data from room array and use it to populate rows in MySQL for each instance of room.

This is the code I have so far which prints the names and values in the room array. However, it only gets one of the room arrays. What can I do to read all of the rooms? I am also thinking this is too many for-each but don't seem to be able to traverse down ['']['']['']... or by just using the associative name.

foreach($arr['search'] as $lr_rates) {
        foreach($lr_rates['hotel'] as $hotel) {
                   foreach($hotel['room'] as  $field => $value){
                     print $field;print $value;
                          }

             }
      }

It might also be worth mentioning the values in these arrays are always fluctuating.

回答1:

I think you can really simplify this quote a bit. If you know that this will always be the structure then you can jump right down into the hotels and then into the rooms.

foreach($arr['search']['lr_rates']['hotel'] as $hotel) {
      // You can access all of the keys in the hotel array here

      foreach($hotel['hotel_rooms'] as $room) {
          // Do stuff with the room array
      }  
}

I would recommend either building your insert script on the fly and calling the database just once for the write, or if you are updating then using a transaction. As the number of rooms gets larger you will slow your script down with a bunch of writes to disk.

回答2:

the formatting of your data's output is very bad and unreadable. I cannot really identify what you are trying to do.

1. possibility: the inner array [hotel_rooms] => Array () uses the key room multiple times. as array keys are unique, you overwrite the data at the index room. this is why you only get one room.

2. possibility: there are rooms inside a room -> use a recursive function to iterate over all rooms like this:

   function handleRoom(array $room) {
   
       // do something with $room
   
       if (array_key_exists('room', $room)) {
   
           handleRoom($room['room']);
       }
   }
   
   $room = array(
       'some' => 'room',
       'data' => 'and another',
       'room' => array(
           'is' => 'inside',
           'of the' => 'main room',
       ),
   );
   
   handleRoom($room);
   

来源：https://stackoverflow.com/questions/12042496/complex-multidimentional-associative-array-process-with-foreach