php定位并且获取天气信息

 /**
 *获取天气预报信息
 **/
 header("Content-type: text/html; charset=utf-8");
 class getWeather{
     private $ak;

     public function __construct($ak){
         if($ak){
             $this->ak=$ak;
         } else {
             die('参数错误');exit;
         }

     }

     /**
      * 获取城市名称
      * @param string $ip ip地址(必须为有效ip)
      * return string $city  城市名称，如武汉
     */
     public function getCity($ip=''){
         if(!$ip){
             $ip=$this->get_client_ip();
         }
         $ak=$this->ak;
         $content = file_get_contents("http://api.map.baidu.com/location/ip?ak=$ak&ip=$ip&coor=bd09ll");
         $json = json_decode($content,true);
         if($json['status']==2){
             $city='武汉';
         }else{
             $address=$json['address'];
             $cityarr=explode("|", $address);
             $city=$cityarr['2'];//不带"市",如"武汉",而不是"武汉市"
         }
         return $city;
     }

     /**
      * 获取天气预报信息
      * @param string $city  城市名称，如武汉
      * return array $data 天气信息
     */
     public function weatherInfo($city=''){
         if(!$city){
             $city=$this->getCity();
         }
         $host = "http://jisutqybmf.market.alicloudapi.com";
         $path = "/weather/query";
         $method = "GET";
         $appcode = "1215c3a301254ee79ca773ce9054f2ca";//阿里云appcode
         $headers = array();
         array_push($headers, "Authorization:APPCODE " . $appcode);
         $querys = "city=$city&citycode=citycode&cityid=cityid&ip=ip&location=location";
         $bodys = "";
         $url = $host . $path . "?" . $querys;

         $curl = curl_init();
         curl_setopt($curl, CURLOPT_CUSTOMREQUEST, $method);
         curl_setopt($curl, CURLOPT_URL, $url);
         curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);
         curl_setopt($curl, CURLOPT_FAILONERROR, false);
         curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
         curl_setopt($curl, CURLOPT_HEADER, false);
         if (1 == strpos("$".$host, "https://"))
         {
             curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
             curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);
         }
         $result=curl_exec($curl);
         $data=json_decode($result,true);
         return $data;
     }
     /**
     *获取ip
     */
     public function get_client_ip(){
         if (getenv("HTTP_CLIENT_IP") && strcasecmp(getenv("HTTP_CLIENT_IP"), "unknown")){
             $ip = getenv("HTTP_CLIENT_IP");
         }else if (getenv("HTTP_X_FORWARDED_FOR") && strcasecmp(getenv("HTTP_X_FORWARDED_FOR"), "unknown")){
             $ip = getenv("HTTP_X_FORWARDED_FOR");
         }else if (getenv("REMOTE_ADDR") && strcasecmp(getenv("REMOTE_ADDR"), "unknown"))
             $ip = getenv("REMOTE_ADDR");
         else if (isset($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], "unknown"))
             $ip = $_SERVER['REMOTE_ADDR'];
         else
             $ip = "unknown";
         return($ip);
     }
 }
 $baiduak='CiEwAVN72cVAuHLzNRAMjzpY';//百度地图api的密钥
 $wea=new getWeather($baiduak);
 $json=$wea->weatherInfo();
 print_r($json);exit;