Question

我使用WU api获取一些每小时的天气数据。 API返回一个具有多个每小时值的Json，我想查询我需要的那个：

JSON：

{
  "response": {
  "version":"0.1",
  "termsofService":"http://www.wunderground.com/weather/api/d/terms.html",
  "features": {
  "hourly": 1
  }
    }
        ,
    "hourly_forecast": [
        {
        "FCTTIME": {
        "hour": "13","hour_padded": "13","min": "00","min_unpadded": "0","sec": "0","year": "2015","mon": "12","mon_padded": "12","mon_abbrev": "Dec","mday": "30","mday_padded": "30","yday": "363","isdst": "0","epoch": "1451509200","pretty": "1:00 PM PST on December 30, 2015","civil": "1:00 PM","month_name": "December","month_name_abbrev": "Dec","weekday_name": "Wednesday","weekday_name_night": "Wednesday Night","weekday_name_abbrev": "Wed","weekday_name_unlang": "Wednesday","weekday_name_night_unlang": "Wednesday Night","ampm": "PM","tz": "","age": "","UTCDATE": ""
        },
        "temp": {"english": "60", "metric": "16"},
        "dewpoint": {"english": "34", "metric": "1"},
        "condition": "Clear",
        "icon": "clear"
        }
        ,
        {
        "FCTTIME": {
        ...
        }
        ,
        "FCTTIME": {
        ...
        },
        ... more FCTTIME
   ]
}

这是我将hourly_forecast作为数组的代码：

$jsonRequest    = file_get_contents("weather.json");
$data           = json_decode($jsonRequest, true);

$array   = @$data['hourly_forecast'];

我需要获取temp的{{1}}和condition。所以PHP会打印出类似："hour": "13"

的内容

Answer 1

首先不要将对象转换为数组，不需要。

所以改变$data = json_decode($jsonRequest, true);

至$data = json_decode($jsonRequest);

然后遍历$data->hourly_forecast数组，寻找您需要的特定时间，例如

foreach( $data->hourly_forecast as $forecast ) {
    if ( $forecast->FCTTIME->hour == 13 ) {
        echo 'The time  ' . $forecast->FCTTIME->hour.PHP_EOL;
        echo 'The temp F' . $forecast->temp->english.PHP_EOL;
        echo 'The temp C' . $forecast->temp->metric.PHP_EOL;
        echo 'The condition ' . $forecast->condition.PHP_EOL;

        // if this is all you need, stop looping
        break;
    }
}

Answer 2

您应该可以循环显示每小时预测，并在找到与您要查找的小时匹配的预测时，从该预测中获取所需的值，然后突破循环。

foreach ($data['hourly_forecast'] as $forecast) {
    if ($forecast['FCTTIME']['hour'] == 13) {
        $condition = $forecast['condition'];
        $temp = $forecast['temp'];
        break;
    }
}

在Json（嵌套数组）PHP中搜索一个键

2 个答案: