这是来自百度API的一个天气查询的接口，支持历史7天和未来4天的天气情况查询，接口不错，分享给大家。
接口申请地址：http://apistore.baidu.com/apiworks/servicedetail/112.html
首先，获取一下apikey（貌似需要手机验证码认证下）
我调用的是历史7天和未来4天的接口，接口地址是：
http://apis.baidu.com/apistore/weatherservice/recentweathers
我将这个天气查询的功能集成在了微信公众平台上，支持未来4天天气查询，包括：当前温度、pm值、风向、风力、最高温度、最低温度、天气状态的查询，效果如下：
闲话不多说，我就喜欢来点直接的，核心代码如下：
1 //接收到文本信息
2 private function receiveText($object){
3 //多个空格缩为一个
4 $keyword = $object->Content;
5 $keyword=preg_replace("/s(?=s)/","\1",$keyword);
6 $funcFlag = 0;
7 if(strpos($keyword," ")){
8 //echo '有空格';
9 $arr = explode(" ",$keyword);
10 if($arr[0]=="天气"){
11 $dateArray = array();
12 $ch = curl_init();
13 $city=urlencode($arr[1]);
14 $url = 'http://apis.baidu.com/apistore/weatherservice/recentweathers?cityname='.$city;
15 $header = array(
16 'apikey: 6512ad3a465e3a9e3d0d1da56639626c',
17 );
18 curl_setopt($ch, CURLOPT_HTTPHEADER , $header);
19 curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
20 curl_setopt($ch , CURLOPT_URL , $url);
21 $res = curl_exec($ch);
22 $data = json_decode($res,true);
23 $cityname=$data['retData']['city'];
24 $citydate=$data['retData']['today']['date'];
25 $cityweek=$data['retData']['today']['week'];
26 $citytemp=$data['retData']['today']['curTemp'];
27 $citypm=$data['retData']['today']['aqi'];
28 $cityhightemp=$data['retData']['today']['hightemp'];
29 $citylowtemp=$data['retData']['today']['lowtemp'];
30 $citytype=$data['retData']['today']['type'];
31 $cityfengli=$data['retData']['today']['fengli'];
32 $cityfengxiang=$data['retData']['today']['fengxiang'];
33 $cityforecast=$data['retData']['forecast'];
34
35 $out="今日温度：".$citylowtemp."~".$cityhightemp."
"."当前温度：".$citytemp."
"."天气情况：".$citytype."
"."PM2.5值：".$citypm."
风向风力：".$cityfengxiang." ".$cityfengli;
36 $dateArray[] = array("Title"=>$cityname."
".$citydate." ".$cityweek,"Description"=>"","Picurl"=>"","Url" =>"");
37 $dateArray[] = array("Title"=>$out,"Description"=>"","Picurl"=>"","Url" =>"");
38 for($i=0;$i<count($cityforecast);$i++){
39 $outstr="☀ ".$cityforecast[$i]["date"]." ".$cityforecast[$i]["week"]."
气温：".$cityforecast[$i]["lowtemp"]."~".$cityforecast[$i]["hightemp"]."
风力：".$cityforecast[$i]["fengxiang"]." ".$cityforecast[$i]["fengli"]."
天气：".$cityforecast[$i]["type"];
40 $dateArray[] = array("Title"=>$outstr,"Description"=>"","Picurl"=>"","Url" =>"");
41 }
42 $resultStr = $this->transmitNews($object, $dateArray, $funcFlag);
43 }
44 }else{
45 //echo '没有空格';
46 if($keyword=="天气"){
47 $dateArray = array();
48 $dateArray[] = array("Title"=>"查询格式错误","Description"=>"","Picurl"=>"","Url" =>"");
49 $dateArray[] = array("Title"=>"正确格式例：天气 北京","Description"=>"","Picurl"=>"","Url" =>"");
50 $resultStr = $this->transmitNews($object, $dateArray, $funcFlag);
51 }
52 }
53 return $resultStr;
54 }
查询格式：“天气 城市名”