Question

我调用一个api，得到的响应是

我想访问 checkpoint_status 的值，但是我无法通过以下方式到达那里：

response in variable 
$track = print_r($track);

1. $track['checkpoint_status']
2. $track[0] // just to see if it returns anything, but no result
3. $track[1] // just to see if it returns anything, but no result
4. array_column($track, 'checkpoint_status'); // returns nothing

Answer 1

您需要循环播放以获取所有nodeB

checkpoint_status

示例输出：-https://3v4l.org/IM7I1

Answer 2

您可以使用array_walk_recursive

 $r = [];
 array_walk_recursive($a, function($v, $k) use(&$r){
  ($k == 'checkpoint_status') ? ($r[]=$v) : '';
 });

https://3v4l.org/rCVEB

Answer 3

    $response = [
    'meta' => [
        'code' => 200,
        'type' => 'Success',
        'message' => 'Success',
    ],
    'data' =>  [
        'items' =>  [
            '0' =>  [ 
                'id' => 'b4a235596fd9550dfb69f181f4db007f', 
                'tracking_number' => '2649884668232181', 
                'carrier_code' => 'hermes', 
                'order_create_time' => null, 
                'destination_code' => null, 
                'status' => 'delivered', 
                'track_update' => null, 
                'original_country' => null, 
                'itemTimeLength' => 7, 
                'stayTimeLength' => 74, 
                'service_code' => null, 
                'packageStatus' => null, 
                'substatus' => null, 
                'last_mile_tracking_supported' => null,
                'origin_info' =>  [ 
                    'ItemReceived' => '2019-04-09 09:29',
                    'ItemDispatched' =>  null,
                    'DepartfromAirport' =>  null,
                    'ArrivalfromAbroad' =>  null,
                    'CustomsClearance' =>  null,
                    'DestinationArrived' =>  null,
                    'weblink' => 'https://www.hermesworld.com/en/',
                    'phone' => null,
                    'carrier_code' => 'hermes',
                    'trackinfo' =>  [ 
                        '0' =>  [ 
                                'Date' => '2019-04-15 11:51', 
                                'StatusDescription' => 'Posted through letterbox', 
                                'Details' =>null, 
                                'checkpoint_status' => 'delivered', 
                        ],
                        '1' =>  [
                            'Date' => '2019-04-15 09:45',
                            'StatusDescription' => 'Delivery will be attempted between 10:00 and 14:00 today',
                            'Details' => null,
                            'checkpoint_status' => 'transit',
                        ], 
                        '2' =>  [ 
                            'Date' => '2019-04-15 06:39',
                            'StatusDescription' => 'On its way to the courier',
                            'Details' =>null, 
                            'checkpoint_status' => 'transit',
                        ], 
                        '3' =>  [ 
                            'Date' => '2019-04-14 22:33',
                            'StatusDescription' => 'At the customers local depot',
                            'Details' => null,
                            'checkpoint_status' => 'transit',
                        ],
                    ]
                ],
                'destination_info' => null,
                'lastEvent' => 'Posted through letterbox,2019-04-15 11:51',
                'lastUpdateTime' => '2019-04-15 11:51',
            ]
        ]
    ]
];

如果您在开发模式下工作，则可以打开php上的显示错误，并可能得到以下结果：

echo $response['checkpoint_status']; // won't work as response array has no checkpoint_status keyed array
echo $response[0]; // won't work as response array has no 0 keyed array
echo $response[1]; // won't work as response array has no 1 keyed array
print_r(array_column($response, 'checkpoint_status')); // won't work as response array has no column checkpoint_status

您可以通过多种方式获得结果，其中一种方法如下：

$trackinfo = $response['data']['items'][0]['origin_info']['trackinfo'];
$checkpoint_status = array_column($trackinfo, 'checkpoint_status');
print_r($checkpoint_status);

结果：

Array ( 
    [0] => delivered 
    [1] => transit 
    [2] => transit 
    [3] => transit
)

访问php对象数组的单个值

3 个答案: