我正在使用地下天气的API。我想在localhost上把一些值放到我的网站上。我没有问题包含很多价值观。像:
温度:30°F
风:快
以下是这些值的json:
"current_observation": {
"image": {
"url":"http://icons-ak.wxug.com/graphics/wu2/logo_130x80.png",
"title":"Weather Underground",
"link":"http://www.wunderground.com"
},
"display_location": {
"full":"Buenos Aires, Argentina",
"city":"Buenos Aires",
"state":"",
"state_name":"Argentina",
"country":"AG",
"country_iso3166":"AR",
"zip":"00000",
"magic":"1",
"wmo":"87582",
"latitude":"-34.56999969",
"longitude":"-58.41999817",
"elevation":"6.00000000"
},
"observation_location": {
"full":"Palermo, Buenos Aires, Ciudad Autónoma de Buenos Aires",
"city":"Palermo, Buenos Aires",
"state":"Ciudad Autónoma de Buenos Aires",
"country":"Argentina",
"country_iso3166":"AR",
"latitude":"-34.595318",
"longitude":"-58.419781",
"elevation":"124 ft"
},
"estimated": {
},
"station_id":"IBUENOSA157",
"observation_time":"Last Updated on April 26, 7:52 PM ART",
"observation_time_rfc822":"Sat, 26 Apr 2014 19:52:51 -0300",
"observation_epoch":"1398552771",
"local_time_rfc822":"Sat, 26 Apr 2014 19:52:52 -0300",
"local_epoch":"1398552772",
"local_tz_short":"ART",
"local_tz_long":"America/Buenos_Aires",
"local_tz_offset":"-0300",
"weather":"Clear",
"temperature_string":"65.8 F (18.8 C)",
"temp_f":65.8,
"temp_c":18.8,
"relative_humidity":"63%",
并在索引php文件中:
<?php
$json_string = file_get_contents("http://api.wunderground.com/api/f84c5a4cd54b3216/geolookup/alerts/astronomy/almanac/conditions/forecast/hourly/q/autoip.json");
$parsed_json = json_decode($json_string);
$temp_c = $parsed_json->{'current_observation'}->{'temp_c'};
echo "{$'temp_c'};
显示温度。 json代码中的温度位于:Current_observation
,然后是值temp_c
。
问题在于我想回应预测,预测位于与temp_c
不同的位置。
例如。我想回应当前的情况,就是这里:
问题在于:
{'forecast'}->{'simpleforecast'}->{'forecastday'}
然后当天为零,第二天为1,第二天为2,第二天为下一天为3。
当我尝试在php中执行此操作时:
{'forecast'}->{'simpleforecast'}->{'forecastday'}->{'0'}->{'conditions'};
它没有显示任何内容。如果在数组中有一个0?
,我怎么能进入值jsonPD:对于0,有一个条件,1(即第二天)有其他条件,就像其他日子一样。感谢
答案 0 :(得分:2)
对我来说它运行正常,我只是测试了你的代码,我只是修改了一下:
<?php
$json_string = file_get_contents("http://api.wunderground.com/api/f84c5a4cd54b3216/geolookup/alerts/astronomy/almanac/conditions/forecast/hourly/q/autoip.json");
$parsed_json = json_decode($json_string, true);
$desired_forecast = $parsed_json['forecast']['simpleforecast']['forecastday'][0]['conditions'];
echo '<pre>';
print_r($desired_forecast); // Thunderstorm
echo '</pre>';
可以访问。
答案 1 :(得分:1)
你真的很接近但是{'0'}
表示有一个带有0
键的对象,而你真的想要访问forecastday
的第一个索引
var_dump($parsed_json->{'forecast'}->{'simpleforecast'}->{'forecastday'}[0]->conditions);