提取雅虎api数据-php？

如何通过php获取质心、位置、国家等信息？

{ "query" : { "count" : 2,
  "created" : "2014-03-08T10:16:51Z",
  "lang" : "en-US",
  "results" : { "place" : [ { "admin1" : { "code" : "IN-DL",
                "content" : "Delhi",
                "type" : "Territory",
                "woeid" : "20070458"
              },
            "admin2" : { "code" : "",
                "content" : "New Delhi",
                "type" : "District",
                "woeid" : "28743736"
              },
            "admin3" : null,
            "areaRank" : "4",
            "boundingBox" : { "northEast" : { "latitude" : "28.645321",
                    "longitude" : "77.240784"
                  },
                "southWest" : { "latitude" : "28.569349",
                    "longitude" : "77.166237"
                  }
              },
            "centroid" : { "latitude" : "28.607330",
                "longitude" : "77.203506"
              },
            "country" : { "code" : "IN",
                "content" : "India",
                "type" : "Country",
                "woeid" : "23424848"
              },
            "lang" : "en-US",
            "locality1" : { "content" : "Delhi",
                "type" : "Town",
                "woeid" : "2295019"
              },
            "locality2" : null,
            "name" : "New Delhi",
            "placeTypeName" : { "code" : "9",
                "content" : "District"
              },
            "popRank" : "0",
            "postal" : null,
            "timezone" : { "content" : "Asia/Kolkata",
                "type" : "Time Zone",
                "woeid" : "28350818"
              },
            "uri" : "http://where.yahooapis.com/v1/place/28743736",
            "woeid" : "28743736"
          },
          { "admin1" : { "code" : "US-IL",
                "content" : "Illinois",
                "type" : "State",
                "woeid" : "2347572"
              },
            "admin2" : { "code" : "",
                "content" : "Jersey",
                "type" : "County",
                "woeid" : "12588119"
              },
            "admin3" : null,
            "areaRank" : "2",
            "boundingBox" : { "northEast" : { "latitude" : "39.043468",
                    "longitude" : "-90.245506"
                  },
                "southWest" : { "latitude" : "39.025280",
                    "longitude" : "-90.268921"
                  }
              },
            "centroid" : { "latitude" : "39.034382",
                "longitude" : "-90.257217"
              },
            "country" : { "code" : "US",
                "content" : "United States",
                "type" : "Country",
                "woeid" : "23424977"
              },
            "lang" : "en-US",
            "locality1" : { "content" : "New Delhi",
                "type" : "Town",
                "woeid" : "23510871"
              },
            "locality2" : null,
            "name" : "New Delhi",
            "placeTypeName" : { "code" : "7",
                "content" : "Town"
              },
            "popRank" : "1",
            "postal" : { "content" : "62052",
                "type" : "Zip Code",
                "woeid" : "12784947"
              },
            "timezone" : { "content" : "America/Chicago",
                "type" : "Time Zone",
                "woeid" : "56043661"
              },
            "uri" : "http://where.yahooapis.com/v1/place/23510871",
            "woeid" : "23510871"
          }
        ] }
} }

---

它不进入

if（is_array（$json））{

循环。

您需要使用

json\u decode（）

：

然后使用

var\u dump（）

可以查看对象中的内容并选择所需内容：

$json = json_decode(curl_exec($ch)); //RESULT  of YQL QUERY

以这个例子为例

试着这样做：

 var_dump($json->results);

---

这是另一种方法，将json转换为数组，然后显示

  $json = json_decode($data, true);
  //print_r($json);

  foreach($json as $query){
    foreach($query['results']['place'] as $places){
        echo "Latitude: " . $places['centroid']['latitude'] . "\n";
        echo "longitude: " . $places['centroid']['longitude'] . "\n\n";
    }
  }

$data=json\u decode（curl\u exec（$ch），true）；
//打印（数据）；
foreach（$data[“query”][“results”][“place”]作为$key=>$val）{
如果（数组_键_存在（“质心”$val））{
回声“--------------------------
”；
foreach（$val[“形心”]为$k=>$v）{
回声$k.：：'.$v；
回声“
”；
}
回声“--------------------------
”；
}
}

---

您可以在print_r（）中检查数据是如何显示的，并且可以使用它来显示您想要的任何项目。

严重性：警告消息：为foreach（）提供的参数无效，请尝试使用$json=curl_exec（$ch）；然后是$data=json_decode（$json，true）；我使用您的json字符串进行了测试，效果良好。

 var_dump($json->results);

  $json = json_decode($data, true);
  //print_r($json);

  foreach($json as $query){
    foreach($query['results']['place'] as $places){
        echo "Latitude: " . $places['centroid']['latitude'] . "\n";
        echo "longitude: " . $places['centroid']['longitude'] . "\n\n";
    }
  }

$data = json_decode(curl_exec($ch),true);
//print_r($data);


foreach($data["query"]["results"]["place"] as $key=>$val){
  if(array_key_exists("centroid",$val)){
    echo "-----------------------<br />";
    foreach($val["centroid"] as $k=>$v){
        echo $k.' :: '.$v;
        echo '<br />';
    }
    echo "-----------------------<br />";
  }
}