Question

这是我的JSON文件：

{
 "user": {

  "id": "2.8.388387",

  "category": "posts",

  "json_metadata": {

     "tags": [

        "new",

     ],

     "image": [

        "https://s32.postimg.org/4twcn4yrp/13918652_1345543288792650_1255274463_o.gif"

     ]

  }

 }
}

和PHP：

$json = json_decode($content, true);


foreach($json as $i){

  $id = $i['id'];
  $category = $i['category'];
  $image = $i['json_metadata']['image'];

  echo $id;
  echo $category;
  echo $image;
}

Echo $ id和$ category工作正常。但是，$ image错误： 警告：非法字符串偏移＆＃39;图像＆＃39;

任何想法我会错过什么？

Answer 1

试试此代码

$content = '{
              "user": {
                  "id": "example glossary",
                  "category": "example glossary",
                  "json_metadata": {
                      "tags": ["new"],
                      "image": [
                        "https://s32.postimg.org/4twcn4yrp/13918652_1345543288792650_1255274463_o.gif"
                      ]
                  }
              }
            }';
$json = json_decode($content, true);
print_r($json['user']['json_metadata']['image'][0]);

你会得到：

https://s32.postimg.org/4twcn4yrp/13918652_1345543288792650_1255274463_o.gif

Answer 2

json_metadata是循环内的数组，因此您只需要像在数组中一样从数组中获取数据。它很简单......这将现在循环使用。你也可以在循环中打印json_metadata数组。

$content = '{
    "user": {
        "id": "example glossary",
        "category": "example glossary",
        "json_metadata": {
            "tags": ["new"],
            "image": [
                "https://s32.postimg.org/4twcn4yrp/13918652_1345543288792650_1255274463_o.gif"
            ]
        }
    }
}';
$json = json_decode($content, true);
foreach ($json as $i) {
    $id = $i['id'];
    $category = $i['category'];
    $image = $i['json_metadata']['image'][0];

    echo $id;
    echo $category;
    echo $image;
}

非法字符串偏移。无法从JSON多级文件

2 个答案: