Facebook 多级 json php foreach 循环的问题

Question

我知道像这样的问题以前已经被问过很多次了。但是请相信我，我已经搜索过了，但没有得到我的问题所特有的答案。

我正在尝试使用 php.

从 facebook 图 api 获得的 json 响应中获取信息

响应如下所示：

{
  "albums": {
"data": [
  {
    "id": "1111111111111111111111111111", 
    "created_time": "2015-02-27T22:46:22+0000", 
    "photos": {
      "data": [
        {
          "name": "wedding", 
          "source": "https://scontent.xx.fbcdn.net/hphotos-xpf1/v/t1.0-9/xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx", 
          "created_time": "2015-02-27T22:46:28+0000", 
          "id": "1111111111111111111111111111"
        }, 
        {
          "source": "https://scontent.xx.fbcdn.net/hphotos-xpf1/v/t1.0-9/xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx", 
          "created_time": "2015-02-27T22:47:03+0000", 
          "id": "1111111111111111111111111111"
        }, 
        {
          "source": "https://fbcdn-sphotos-e-a.akamaihd.net/hphotos-ak-xfp1/v/t1.0-9/xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx", 
          "created_time": "2015-02-27T22:47:10+0000", 
          "id": "1111111111111111111111111111"
        }, 
        {
          "name": "Shells", 
          "source": "https://fbcdn-sphotos-g-a.akamaihd.net/hphotos-ak-xap1/v/t1.0-9/xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx", 
          "created_time": "2015-02-28T00:09:45+0000", 
          "id": "1111111111111111111111111111"
        }
      ], 
      "paging": {
        "cursors": {
          "before": "MTU5NjUyNDQzMzkxMDkwNQ==", 
          "after": "MTU5NjU0MDcwMzkwOTI3OA=="
        }
      }
    }
  }, 
  {
    "id": "1111111111111111666111111111", 
    "created_time": "2015-02-27T22:35:44+0000", 
    "photos": {
      "data": [
        {
          "source": "https://scontent.xx.fbcdn.net/hphotos-xpf1/v/t1.0-9/xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx", 
          "created_time": "2015-02-27T22:35:46+0000", 
          "id": "111111111111111111111111333"
        }
      ], 
      "paging": {
        "cursors": {
          "before": "MTU5NjUyMjU1NzI0NDQyNg==", 
          "after": "MTU5NjUyMjU1NzI0NDQyNg=="
        }
      }
    }
  }
], 
"paging": {
  "cursors": {
    "after": "MTU5NjUyMjU1MDU3Nzc2MA==", 
    "before": "MTU5NjUyNDQwNzI0NDI0MQ=="
  }
}
}, 
"id": "76577536756346436343434"
 }

问题是；响应有 2 个级别的数据数组。我需要从 "photos" "data" 数组中获取 "source" 和 "name"。

这是我所做的：

<?php
$fbpageid = "I HAVE A VALID PAGE ID I USED HERE";
$fbaccess_token = "I HAVE A VALID ACCESS TOKEN I USED HERE";
$fburl = "https://graph.facebook.com/v2.2/{$fbpageid}?fields=albums{photos{name,source}}&access_token={$fbaccess_token}";
/***I ENTERED THIS URL ABOVE INTO MY BROWSER WITH ALL THE VARIABLES CORRECT, IT WORKED FINE.. ..GAVE ME A RESPONSE LIKE THE ONE ABOVE**/

$fbfetch = file_get_contents($fburl); /***FROM MY PREVIOUS INSTAGRAM PROJECTS, I KNOW THIS WORKS FINE**/

$albums = json_decode($fbfetch); /***I KNOW THIS WORKS FINE TOO**/



  <?php
     foreach ($albums->albums->data as $photo) {
        echo $photo->id . '<br>'; /**THIS WORKS**/
      }
   ?> 



foreach ($albums->albums->data->photos->data as $photo) { ?>


    <a href="<?php echo $photo['source']; ?>" title="<?php echo $photo['name']; ?>">
        <img src="<?php echo $photo['source']; ?>" alt="<?php echo $photo['name']; ?>" />

    </a> 


<?php } /**THIS DOESNT**/ ?>

我可以从第一层的 "albums" "data" 数组中获取 "id" 之类的信息（顺便说一句，我不需要），但那是据我所知。我真正需要的是 "photos" 数组中的信息。

如果能帮助解决这个问题，我们将不胜感激。

Answer 1

<?php
$fbfetch='{
  "albums": {
"data": [
  {
    "id": "1111111111111111111111111111", 
    "created_time": "2015-02-27T22:46:22+0000", 
    "photos": {
      "data": [
        {
          "name": "wedding", 
          "source": "https://scontent.xx.fbcdn.net/hphotos-xpf1/v/t1.0-9/xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx", 
          "created_time": "2015-02-27T22:46:28+0000", 
          "id": "1111111111111111111111111111"
        }, 
        {
          "source": "https://scontent.xx.fbcdn.net/hphotos-xpf1/v/t1.0-9/xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx", 
          "created_time": "2015-02-27T22:47:03+0000", 
          "id": "1111111111111111111111111111"
        }, 
        {
          "source": "https://fbcdn-sphotos-e-a.akamaihd.net/hphotos-ak-xfp1/v/t1.0-9/xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx", 
          "created_time": "2015-02-27T22:47:10+0000", 
          "id": "1111111111111111111111111111"
        }, 
        {
          "name": "Shells", 
          "source": "https://fbcdn-sphotos-g-a.akamaihd.net/hphotos-ak-xap1/v/t1.0-9/xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx", 
          "created_time": "2015-02-28T00:09:45+0000", 
          "id": "1111111111111111111111111111"
        }
      ], 
      "paging": {
        "cursors": {
          "before": "MTU5NjUyNDQzMzkxMDkwNQ==", 
          "after": "MTU5NjU0MDcwMzkwOTI3OA=="
        }
      }
    }
  }, 
  {
    "id": "1111111111111111666111111111", 
    "created_time": "2015-02-27T22:35:44+0000", 
    "photos": {
      "data": [
        {
          "source": "https://scontent.xx.fbcdn.net/hphotos-xpf1/v/t1.0-9/xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx", 
          "created_time": "2015-02-27T22:35:46+0000", 
          "id": "111111111111111111111111333"
        }
      ], 
      "paging": {
        "cursors": {
          "before": "MTU5NjUyMjU1NzI0NDQyNg==", 
          "after": "MTU5NjUyMjU1NzI0NDQyNg=="
        }
      }
    }
  }
], 
"paging": {
  "cursors": {
    "after": "MTU5NjUyMjU1MDU3Nzc2MA==", 
    "before": "MTU5NjUyNDQwNzI0NDI0MQ=="
  }
}
}, 
"id": "76577536756346436343434"
 }';

 $albums = json_decode($fbfetch);

//print_r($albums); //For troubleshooting
 foreach ($albums->albums->data as $photos) { // I changed $photo to $photos here
    echo $photos->id . '<br>'; /**THIS WORKS**/
    //print_r($photos); //For troubleshooting
    foreach ($photos->photos->data as $photo) { ?>
        <?php //print_r($photo); //For troubleshooting ?>
        <a href="<?php echo $photo->source; ?>" title="<?php echo $photo->name; ?>">
            <img src="<?php echo $photo->source; ?>" alt="<?php echo $photo->name; ?>" />

        </a> 

    <?php }
  }
?>

出于我的目的，我使用了字符串格式的示例 JSON。您会注意到我使用了一些 print_r。他们现在被注释掉了。我只是用它们来帮助找到问题。问题出在最后一点。

<a href="<?php echo $photo->source; ?>" title="<?php echo $photo->name; ?>">
<img src="<?php echo $photo->source; ?>" alt="<?php echo $photo->name; ?>" />
</a>

这些被写成数组 $photo['source'] 而不是对象 $photo->source

（而且，是的，我仍然使用嵌入式 foreach）

希望对您有所帮助！它运行非常适合我。使用以下输出的较长版本：

1111111111111111111111111111<br>                <a href="https://scontent.xx.fbcdn.net/hphotos-xpf1/v/t1.0-9/xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" title="wedding">
            <img src="https://scontent.xx.fbcdn.net/hphotos-xpf1/v/t1.0-9/xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" alt="wedding" />

        </a> 

                    <a href="https://scontent.xx.fbcdn.net/hphotos-xpf1/v/t1.0-9/xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" title="">
            <img src="https://scontent.xx.fbcdn.net/hphotos-xpf1/v/t1.0-9/xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" alt="" />

        </a>

Facebook 多级 json php foreach 循环的问题

Trouble with Facebook multi-level json php foreach loop

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