我试图从提供JSON格式数据的Web服务请求天气。我的PHP请求代码失败了:
JSON
$url="http://www.worldweatheronline.com/feed/weather.ashx?q=schruns,austria&format=json&num_of_days=5&key=8f2d1ea151085304102710"; $json = file_get_contents($url); $data = json_decode($json, TRUE); echo $data[0]->weather->weatherIconUrl[0]->value;
这是返回的一些数据。为了简洁起见,一些细节已被截断,但保留了对象完整性:
{ "data": { "current_condition": [ { "cloudcover": "31", ... } ], "request": [ { "query": "Schruns, Austria", "type": "City" } ], "weather": [ { "date": "2010-10-27", "precipMM": "0.0", "tempMaxC": "3", "tempMaxF": "38", "tempMinC": "-13", "tempMinF": "9", "weatherCode": "113", "weatherDesc": [ {"value": "Sunny" } ], "weatherIconUrl": [ {"value": "http:\/\/www.worldweatheronline.com\/images\/wsymbols01_png_64\/wsymbol_0001_sunny.png" } ], "winddir16Point": "N", "winddirDegree": "356", "winddirection": "N", "windspeedKmph": "5", "windspeedMiles": "3" }, { "date": "2010-10-28", ... }, ... ] } } }
这似乎起作用:
$url = 'http://www.worldweatheronline.com/feed/weather.ashx?q=schruns,austria&format=json&num_of_days=5&key=8f2d1ea151085304102710%22'; $content = file_get_contents($url); $json = json_decode($content, true); foreach($json['data']['weather'] as $item) { print $item['date']; print ' - '; print $item['weatherDesc'][0]['value']; print ' - '; print '<img src="' . $item['weatherIconUrl'][0]['value'] . '" border="0" alt="" />'; print '<br>'; }
如果将json_decode的第二个参数设置为true,则会得到一个数组,因此无法使用->语法。我还建议您安装JSONview Firefox扩展,以便您可以以类似于 Firefox显示XML结构的漂亮格式的树状视图查看生成的json文档。这使事情变得容易得多。