我使用WU api来获取一些每小时的天气数据。API返回具有多个小时值的Json，我想查询我需要的值：
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'];
我需要为"hour": "13"获取temp和condition。因此PHP会打印类似的内容：The weather is $condition with $temp degree.
首先不要将对象转换为数组，不需要。
因此更改$data = json_decode($jsonRequest, true);
至$data = json_decode($jsonRequest);
然后在$data->hourly_forecast阵列上循环，查找您需要的特定时间，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 ' . $forecast->condition.PHP_EOL;
// if this is all you need, stop looping
break;
}
}
您应该能够在一组小时预测上循环，当您找到与您要查找的小时相匹配的预测时，从该预测中获得您想要的值，然后脱离循环。
foreach ($data['hourly_forecast'] as $forecast) {
if ($forecast['FCTTIME']['hour'] == 13) {
$condition = $forecast['condition'];
$temp = $forecast['temp'];
break;
}
}