Question

我使用这样的URL从JSON文件中提取数据：

$html5=file_get_contents("url");

$data = json_decode($html5);    

echo $data->a->k->f;

这会显示$27.58这是正确的。

这是我的JSON数据：

{  
"a":{  
   "k":{  
     "c":"tr",
     "f":"$27.58",
     "fb":"$30.35",
     "ci":"12873809",
     "cname":"Cdkeysgame_com",
     "ep":"26.05",
     "epb":"28.66",
     "a":"5473091",
     "it":"steam",
     "sl":"0",
     "l":null,
     "lt":null,
     "x":0,
     "v":"retail",
     "ne":0,
     "so":0,
     "tr":304,
     "r":97,
     "cf":1,
     "p":"27.58317275",
     "pb":"30.3467843",
     "eci":"865723abbf1cbb952ad4d2da8a8c925e"
  },
  "k_1":{  
     "c":"gb",
     "f":"$27.64",
     "fb":"$30.40",
     "ci":"1065801",
     "cname":"World_of_games",
     "ep":"26.10",
     "epb":"28.71",
     "a":"781851",
     "it":"steam",
     "sl":"0",
     "l":null,
     "lt":null,
     "x":0,
     "v":"all",
     "ne":0,
     "so":0,
     "tr":1041328,
     "r":99,
     "cf":1,
     "p":"27.6361155",
     "pb":"30.39972705",
     "eci":"d01a7cacb0e424123985bfe2e53a0523"
  },
  "k_2":{  
     "c":"ch",
     "f":"$27.68",
     "fb":"$30.44",
     "ci":"696012",
     "cname":"G_hard",
     "ep":"26.14",
     "epb":"28.75",
     "a":"1287052",
     "it":"steam",
     "sl":"0",
     "l":null,
     "lt":null,
     "x":0,
     "v":"retail",
     "ne":0,
     "so":0,
     "tr":10818,
     "r":99,
     "cf":1,
     "p":"27.6784697",
     "pb":"30.44208125",
     "eci":"a6666c0a47acb70d14b757cd52f1b9cc"
  }}

我需要在不使用k的情况下显示相同的数据。例如，我想：

 echo $data->a->'Something that specifies first element of 'a' i.e k and not'k_1' and 'k_2'->f;

由于我正在抓取此内容，因此无法更改此JSON文件中的结构或数据。

Answer 1

如果您只想要a下的第一个条目，那么您可以解码为数组：

$data = json_decode($json, true);

然后获取$data['a']的第一个元素并使用它。 current()也可以运作：

echo reset($data['a'])['f'];

或者以数字方式重新索引$data['a']并访问第一个0：

echo array_values($data['a'])[0]['f'];

抓住他们所有人：

foreach($data['a'] as $values) {
    echo $values['f'];
    //break; if you only want the first one
}

Answer 2

你可以这样做：

$object = json_decode($html5);

foreach ($object->a as $element) {
   echo $element->f;
}

在PHP中显示特定JSON数据的替代方法

2 个答案: