微信公众平台百度天气预报开发

1.登录百度ak申请：

2.实现天气信息功能

baiduWeather.php

<?php
/**
 *  使用百度天气预报接口获取城市天气信息案例实现
 */

    //获取城市天气信息
    function getWeatherInfo($cityName){
        if($cityName == "" || (strstr($cityName,"+"))){
            return "发送城市加天气,例如北京天气";
        }
        //获取到的ak
        $ak = your ak;
        //获取到的sk
        $sk = your sk;
        //调用接口
        $url = http://api.map.baidu.com/telematics/v3/weather?ak=%s&location=%s&output=%s&sk=%s;
        $uri = /telematics/v3/weather;

        $location = $cityName;
        $output = json;
        $querystring_arrays = array(
            ak => $ak,
            location => $location,
            output => $output
        );

        $querystring = http_build_query($querystring_arrays);
       //生成sn
        $sn = md5(urlencode($uri.?.$querystring.$sk));
        $targetUrl = sprintf($url,$ak,urlencode($location),$output,$sn);

        $ch = curl_init();
        curl_setopt($ch,CURLOPT_URL,$targetUrl);
        curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
        $result = curl_exec($ch);
        curl_close($ch);
        $result = json_decode($result,true);

        if($result["error"]!=0){
            return $result["status"];
        }

        $curHour = (int)date(H,time());
        $weather = $result["results"][0];
        $weatherArray[]=array("Title"=>$weather[currentCity]."天气预报","Description"=>"","PicUrl"=>"","Url"=>"");
        for($i = 0;$i<count($weather["weather_data"]);$i++){
            $weatherArray[] = array("Title"=>
                $weather["weather_data"][$i]["date"]."
".
                $weather["weather_data"][$i]["weather"].
                $weather["weather_data"][$i]["wind"].
                $weather["weather_data"][$i]["temperature"],
                "Description"=>"",
                "PicUrl"=>(($curHour>=6)&&($curHour<
                18))?$weather["weather_data"][$i]["dayPictureUrl"]:$weather["weather_data"][$i]["nightPictureUrl"],"URL"=>""
            );
        }
        return $weatherArray;
    }

3.实现天气消息事件