如何使用 PHP 从 JSON 中获取数据

debugcn 发表于 Dev

市场

我有一个 JSON 文件，我想用 PHP 访问并获取某些数据。

杰森

{
  "time": {
    "updated": "Aug 5, 2017 11:29:00 UTC",
    "updatedISO": "2017-08-05T11:29:00+00:00",
    "updateduk": "Aug 5, 2017 at 12:29 BST"
  },
  "disclaimer": "This data was produced from the CoinDesk Bitcoin Price Index (USD). Non-USD currency data converted using hourly conversion rate from openexchangerates.org",
  "chartName": "Bitcoin",
  "bpi": {
    "USD": {
      "code": "USD",
      "symbol": "&#36;",
      "rate": "3,162.7838",
      "description": "United States Dollar",
      "rate_float": 3162.7838
    },
    "GBP": {
      "code": "GBP",
      "symbol": "&pound;",
      "rate": "2,425.3554",
      "description": "British Pound Sterling",
      "rate_float": 2425.3554
    },
    "EUR": {
      "code": "EUR",
      "symbol": "&euro;",
      "rate": "2,686.2440",
      "description": "Euro",
      "rate_float": 2686.244
    }
  }
}

我试图从 JSON 对象中获取数据并尝试了这些事情。没有任何运气。

$test = $json_data['bpi']['EUR'][0]['rate'];
echo $test;

$array = json_decode($json_data, true);
echo $array->bpi->EUR->rate;
echo $array['bpi'][2]['rate'];
echo $array[1]['bpi'][1];

有人可以帮我吗

Danila Ganchar

首先bpi是关联数组（键 - 字符串，而不是整数）

$data = '{your_json_string_here}';
# as array
$array = json_decode($data, true);

echo $array['bpi']['EUR']['rate']; # 2,686.2440

# as object 
$array = json_decode($data);

echo $array->bpi->EUR->rate; # 2,686.2440

使用print_r($array);用于调试。希望这可以帮助。

本文收集自互联网，转载请注明来源。

如有侵权，请联系[email protected] 删除。