如何过滤在PHP（stdClass的）阵列

Question

我需要过滤数组刚刚得到的“代码”

array (size=17) 
    0 => 
    object(stdClass)[5] 
     public 'code' => string 'BN_L-_agmgt' (length=11) 
     public 'dimensions' => 
     object(stdClass)[6] 
      public 'width' => int 1080 
      public 'height' => int 810 
     public 'comments_disabled' => boolean false 
     public 'owner' => 
     object(stdClass)[7] 
      public 'id' => string '301290076' (length=9) 
     public 'comments' => 
     object(stdClass)[8] 
      public 'count' => int 0 
     public 'caption' => string '#lights #beautiful #piazza #plebiscito #photo #followme #likeforlike' (length=68) 
     public 'likes' => 
     object(stdClass)[9] 
      public 'count' => int 21 
     public 'date' => int 1481696475 
     public 'thumbnail_src' => string 'https://instagram.fclo1-1.fna.fbcdn.net/t51.2885-15/s640x640/sh0.08/e35/c135.0.810.810/14624676_588980267967030_6184721183611551744_n.jpg?ig_cache_key=MTQwNDg5NDMxNTk3MjU1Mjc0OQ%3D%3D.2.c' (length=187) 
     public 'is_video' => boolean false 
     public 'id' => string '1404894315972552749' (length=19) 
     public 'display_src' => string 'https://instagram.fclo1-1.fna.fbcdn.net/t51.2885-15/e35/14624676_588980267967030_6184721183611551744_n.jpg?ig_cache_key=MTQwNDg5NDMxNTk3MjU1Mjc0OQ%3D%3D.2' (length=154) 
    1 => 
    object(stdClass)[10] 
     public 'code' => string 'BN-eRGQh8IK' (length=11) 
     public 'dimensions' => 
     object(stdClass)[11] 
      public 'width' => int 750 
      public 'height' => int 538 
     public 'comments_disabled' => boolean false 
     public 'owner' => 
     object(stdClass)[12] 
      public 'id' => string '311016089' (length=9) 
     public 'comments' => 
     object(stdClass)[13] 
      public 'count' => int 2 
     public 'caption' => string '#plebiscito' (length=11) 
     public 'likes' => 
     object(stdClass)[14] 
      public 'count' => int 24 
     public 'date' => int 1481672506 
     public 'thumbnail_src' => string 'https://instagram.fclo1-1.fna.fbcdn.net/t51.2885-15/s640x640/sh0.08/e35/c147.0.750.750/15338447_1774364399481982_8165079596765544448_n.jpg?ig_cache_key=MTQwNDY5MzI1MDEzMjM5NDUwNg%3D%3D.2.c' (length=188) 
     public 'is_video' => boolean false 
     public 'id' => string '1404693250132394506' (length=19) 
     public 'display_src' => string '_n.jpg?ig_cache_key=MTQwNDY5MzI1MDEzMjM5NDUwNg%3D%3D.2' (length=171) 
    2 => 
    object(stdClass)[15] 
     public 'code' => string 'BN-XEcDjd77' (length=11) 
     public 'dimensions' => 
     object(stdClass)[16] 
      public 'width' => int 1080 
      public 'height' => int 1243 
     public 'comments_disabled' => boolean false 
     public 'owner' => 
     object(stdClass)[17] 
      public 'id' => string '301158275' (length=9) 
     public 'comments' => 
     object(stdClass)[18] 
      public 'count' => int 0 
     public 'caption' => string '#piazza #plebiscito #napoli #palazzoreale #luxory #aristocratlife #pieceofhistory #travel #admire #beauty #art #architecture #archilovers #culturalheritage #loveit #details #amazing #place #foreshortening #interior #design #marble #plaster #decoration #whitepower #entrance' (length=275) 
     public 'likes' => 
     object(stdClass)[19] 
      public 'count' => int 26 
     public 'date' => int 1481668732 
     public 'thumbnail_src' => string 'https://instagram.fclo1-1.fna.fbcdn.net/t51.2885-15/s640x640/sh0.08/e35/c0.81.1080.1080/15306100_218138875299871_5131961228335251456_n.jpg?ig_cache_key=MTQwNDY2MTU5Mzg1ODIzNjE1NQ%3D%3D.2.c' (length=188) 
     public 'is_video' => boolean false 
     public 'id' => string '1404661593858236155' (length=19) 
     public 'display_src' => string 'https://instagram.fclo1-1.fna.fbcdn.net/t51.2885-15/e35/15306100_218138875299871_5131961228335251456_n.jpg?ig_cache_key=MTQwNDY2MTU5Mzg1ODIzNjE1NQ%3D%3D.2' (length=154) 
    3 => 
    object(stdClass)[20] 
     public 'code' => string 'BN-KM1wDM3I' (length=11) 
     public 'dimensions' => 
     object(stdClass)[21] 
      public 'width' => int 1080 
      public 'height' => int 1080 
     public 'comments_disabled' => boolean false 
     public 'owner' => 
     object(stdClass)[22] 
      public 'id' => string '584137256' (length=9) 
     public 'comments' => 
     object(stdClass)[23] 
      public 'count' => int 1 
     public 'caption' => string '#pizza#pizzachebonta#napoli#naples#foto_napoli#ioscatto#vivonapoli#italia#italy#plebiscito#gambrinus#rossopomodoro#campania#instamoment#instagood#instagnam#photooftheday#love#simmenapulpaisà ' (length=191) 
     public 'likes' => 
     object(stdClass)[24] 
      public 'count' => int 27 
     public 'date' => int 1481661985 
     public 'thumbnail_src' => string 'https://instagram.fclo1-1.fna.fbcdn.net/t51.2885-15/s640x640/sh0.08/e35/15337164_241291976302551_5452823035130150912_n.jpg?ig_cache_key=MTQwNDYwNDk5NjU5OTQ2NzQ2NA%3D%3D.2' (length=170) 
     public 'is_video' => boolean false 
     public 'id' => string '1404604996599467464' (length=19) 
     public 'display_src' => string 'https://2_n.jpg?ig_cache_key=MTQwNDYwNDk5NjU5OTQ2NzQ2NA%3D%3D.2' (length=154) 

我会感谢你的帮助。 我的代码打印阵列： 代码是过滤来自instagram的数据，但正如你将看到的，我尝试使用var_dump，它过滤我的方式。

<?php 

$baseUrl = 'https://www.instagram.com/explore/tags/plebiscito/?__a=1'; 
$url = $baseUrl; 
$count = 0; 
$array = array();  

while(1) { 
    $json = json_decode(file_get_contents($url)); 

    var_dump(array_filter($json->tag->media->nodes)); // working 
    if(!$json->tag->media->page_info->has_next_page) break; 
    $url = $baseUrl.'&max_id='.$json->tag->media->page_info->end_cursor; 
    ++$count; 
} 
?> 

我想不出任何想法只是打印代码。

Answer 1

假设在你的代码，array_filter($json->tag->media->nodes)返回上面的数组，你可以这样做，以获取该数组，并得到“代码”值：

<?php 

$baseUrl = 'https://www.instagram.com/explore/tags/plebiscito/?__a=1'; 
$url = $baseUrl; 
$count = 0; 
$array = array();  

$json = json_decode(file_get_contents($url)); 

$filter_array = array_filter($json->tag->media->nodes)); // working 
foreach($filter_array as $object_return){ 
    echo $object_return->code.'</br>'; // will output code string 
} 

if(!$json->tag->media->page_info->has_next_page) break; 
$url = $baseUrl.'&max_id='.$json->tag->media->page_info->end_cursor; 
++$count; 

我也去掉了while循环这里没有必要。