获取数组中的youtube频道数据

Question

我试图用那个API获取Youtube频道数据

https://www.googleapis.com/youtube/v3/channels?part=snippet,contentDetails,statistics&id={ Channel Id }&key={ API }

我使用该代码来获取数据

    if( $_SERVER[ 'REQUEST_METHOD' ] == 'GET' && !empty( $_GET ) ){

    $channel_id = $_GET[ 'channel_id' ];

    $curl = curl_init();

    curl_setopt_array($curl, array(
      CURLOPT_URL => "https://www.googleapis.com/youtube/v3/channels?part=snippet,contentDetails,statistics&id=". $channel_id ."&key=AIzaSyCKAnI41bI4UGDJgYUcwrhrIfnjoD3uirM",
      CURLOPT_RETURNTRANSFER => true,
      CURLOPT_ENCODING => "",
      CURLOPT_MAXREDIRS => 10,
      CURLOPT_TIMEOUT => 30,
      CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
      CURLOPT_CUSTOMREQUEST => "GET",
      CURLOPT_POSTFIELDS => "",
      CURLOPT_HTTPHEADER => array(
        "content-type: multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW"
      ),
    ));

    $response = curl_exec($curl);
    $err = curl_error($curl);

    curl_close($curl);

    if ($err) {
      echo "cURL Error #:" . $err;
    } else {
        echo $response;
    }

}

?>
<form id="channelIdForm" action="<?php $_SERVER['PHP_SELF']; ?>" method="get">

    <input type="text" placeholder="Type channel id" name="channel_id" id="channelId" />
    <button type="submit">Get data</button>

</form>

它看起来像那样

{ "kind": "youtube#channelListResponse", "etag": "\"DuHzAJ-eQIiCIp7p4ldoVcVAOeY/pss5QFB6saoevVwzX-8y6f1U75E\"", "pageInfo": { "totalResults": 1, "resultsPerPage": 1 }, "items": [ { "kind": "youtube#channel", "etag": "\"DuHzAJ-eQIiCIp7p4ldoVcVAOeY/gPFze0Hh7eRu9O5tXiTBVyvCwa8\"", "id": "UC4QYTjhWMxiC6UwvKLVkDDA", "snippet": { "title": "حفيد برايز حفيد برايز", "description": "", "publishedAt": "2018-04-01T17:18:31.000Z", "thumbnails": { "default": { "url": "https://yt3.ggpht.com/-wuTRH4WK_UA/AAAAAAAAAAI/AAAAAAAAAAA/ms_Qpu4ekLk/s88-c-k-no-mo-rj-c0xffffff/photo.jpg", "width": 88, "height": 88 }, "medium": { "url": "https://yt3.ggpht.com/-wuTRH4WK_UA/AAAAAAAAAAI/AAAAAAAAAAA/ms_Qpu4ekLk/s240-c-k-no-mo-rj-c0xffffff/photo.jpg", "width": 240, "height": 240 }, "high": { "url": "https://yt3.ggpht.com/-wuTRH4WK_UA/AAAAAAAAAAI/AAAAAAAAAAA/ms_Qpu4ekLk/s800-c-k-no-mo-rj-c0xffffff/photo.jpg", "width": 800, "height": 800 } }, "localized": { "title": "حفيد برايز حفيد برايز", "description": "" } }, "contentDetails": { "relatedPlaylists": { "uploads": "UU4QYTjhWMxiC6UwvKLVkDDA", "watchHistory": "HL", "watchLater": "WL" } }, "statistics": { "viewCount": "830460", "commentCount": "0", "subscriberCount": "3741", "hiddenSubscriberCount": false, "videoCount": "19" } } ] } 

然后我试图将该json转换为数组，以便从索引中选择我想要的东西

所以我尝试了而不是$ response

$json = $response;                                 
  $arr = json_decode($json, true);              
  $row = array_reduce($arr['items'], function($c, $v){
      $c[ key($v) ] = current($v);
      return $c;
  }, array());

  print_r( $row );

我希望看到项目下面的所有索引，但结果是

Array ( [kind] => youtube#channel ) 

它显示只是善良我不知道有什么问题，所以如果任何人可以帮助我将不胜感激！

Answer 1

array_reduce函数将数组减少为单个值。但似乎您对多个键/值对感兴趣。由于json_decode($json, true);已经为您提供了关联数组，因此您可以通过其名称检索特定键。例：

$arr = json_decode($response, true);
$newArray = [];
$requiredKeys = ['kind','etag'];
foreach ($requiredKeys as $key){
      $newArray[$key] = $arr[$key];
}

Answer 2

它是一个非常多维的数组。

这是一些打印数组内容的代码。如果它要打印的值是一个数组，它会再次调用自己。你会看到它输出Printing $json_arr[items[0][statistics] :后跟一堆key->值对，所以你可以找到你想要的状态，你就会知道父数组是什么。

<?php

$json='{ "kind": "youtube#channelListResponse", "etag": "\"DuHzAJ-eQIiCIp7p4ldoVcVAOeY/pss5QFB6saoevVwzX-8y6f1U75E\"", "pageInfo": { "totalResults": 1, "resultsPerPage": 1 }, "items": [ { "kind": "youtube#channel", "etag": "\"DuHzAJ-eQIiCIp7p4ldoVcVAOeY/gPFze0Hh7eRu9O5tXiTBVyvCwa8\"", "id": "UC4QYTjhWMxiC6UwvKLVkDDA", "snippet": { "title": "حفيد برايز حفيد برايز", "description": "", "publishedAt": "2018-04-01T17:18:31.000Z", "thumbnails": { "default": { "url": "https://yt3.ggpht.com/-wuTRH4WK_UA/AAAAAAAAAAI/AAAAAAAAAAA/ms_Qpu4ekLk/s88-c-k-no-mo-rj-c0xffffff/photo.jpg", "width": 88, "height": 88 }, "medium": { "url": "https://yt3.ggpht.com/-wuTRH4WK_UA/AAAAAAAAAAI/AAAAAAAAAAA/ms_Qpu4ekLk/s240-c-k-no-mo-rj-c0xffffff/photo.jpg", "width": 240, "height": 240 }, "high": { "url": "https://yt3.ggpht.com/-wuTRH4WK_UA/AAAAAAAAAAI/AAAAAAAAAAA/ms_Qpu4ekLk/s800-c-k-no-mo-rj-c0xffffff/photo.jpg", "width": 800, "height": 800 } }, "localized": { "title": "حفيد برايز حفيد برايز", "description": "" } }, "contentDetails": { "relatedPlaylists": { "uploads": "UU4QYTjhWMxiC6UwvKLVkDDA", "watchHistory": "HL", "watchLater": "WL" } }, "statistics": { "viewCount": "830460", "commentCount": "0", "subscriberCount": "3741", "hiddenSubscriberCount": false, "videoCount": "19" } } ] } ';

$json_arr=json_decode($json,true);

function print_array($prefix,$arr){
    print("printing ".$prefix." :\n");
    foreach($arr as $k=>$v){
        if(is_array($v)){
            print_array($prefix."[".$k."]",$v);
        }else{
            print("key: ".$k."   value:".$v." \n");
        }
    }
    return;
}

print_array("\$json_arr",$json_arr);

?>