微信公众系列之百度天气预报开发

秒速五厘米 2021-09-10 23:58 344阅读 0赞

1.登录百度ak申请：  
[http://lbsyun.baidu.com/apiconsole/key][http_lbsyun.baidu.com_apiconsole_key]

![Center][]

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"]."\n".
                    $weather["weather_data"][$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

<?php
    /*
        CopyRight 2016 All Rights Reserved
    */
    
    define("TOKEN", "weixin");
    /**
     * 百度天气预报案例实现
     * 实现思路：
     * 1.申请百度ak、sk
     * 2.使用百度天气预报接口
     * 3.实现天气信息功能
     * 4.实现事件响应功能
     */
    $wechatObj = new wechatCallbackapiTest();
    if (!isset($_GET['echostr'])) {
        $wechatObj->responseMsg();
    }else{
        $wechatObj->valid();
    }
    
    class wechatCallbackapiTest
    {
        //验证签名
        public function valid()
        {
            $echoStr = $_GET["echostr"];
            if($this->checkSignature()){
    			header('content-type:text');
                echo $echoStr;
                exit;
            }
        }
    
        public function checkSignature(){
            $signature = $_GET["signature"];
            $timestamp = $_GET["timestamp"];
            $nonce = $_GET["nonce"];
            $token = TOKEN;
            $tmpArr = array($token, $timestamp, $nonce);
            sort($tmpArr);
            $tmpStr = implode($tmpArr);
            $tmpStr = sha1($tmpStr);
            if($tmpStr == $signature) {
                return true;
            }else{
                return false;
            }
        }
    
        //响应消息
        public function responseMsg()
        {
            $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];
            if (!empty($postStr)){
                $this->logger("R ".$postStr);
                $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);
                $RX_TYPE = trim($postObj->MsgType);
    
                //消息类型分离
                switch ($RX_TYPE)
                {
                    case "event":
                        $result = $this->receiveEvent($postObj);
                        break;
                    case "text":
                        $result = $this->receiveText($postObj);
                        break;
                    default:
                        $result = "unknown msg type: ".$RX_TYPE;
                        break;
                }
                echo $result;
            }else {
                echo "";
                exit;
            }
        }
    
        //接收事件消息
        public function receiveEvent($object)
        {
            $content = "";
            switch ($object->Event)
            {
                case "subscribe":
                    $content = "欢迎关注Nicky的公众号 ";
                    $content .= (!empty($object->EventKey))?("\n来自二维码场景 ".str_replace("qrscene_","",$object->EventKey)):"";
                    break;
                case "unsubscribe":
                    $content = "取消关注";
                    break;
            }
            $result = $this->transmitText($object, $content);
            return $result;
        }
    
        //接收文本消息
        public function receiveText($object)
        {
            $keyword = trim($object->Content);
    
            //自动回复模式
    
            if (strstr($keyword, "天气")){
                $city = str_replace('天气','',$keyword);
                include("baiduweather.php");
                $content = getWeatherInfo($city);
            }
            $result = $this->transmitNews($object, $content);
            return $result;
        }
    
        //回复图文消息
        public function transmitNews($object, $newsArray)
        {
            if(!is_array($newsArray)){
                return;
            }
            $itemTpl = "    <item>
            <Title><![CDATA[%s]]></Title>
            <Description><![CDATA[%s]]></Description>
            <PicUrl><![CDATA[%s]]></PicUrl>
            <Url><![CDATA[%s]]></Url>
        </item>
    ";
            $item_str = "";
            foreach ($newsArray as $item){
                $item_str .= sprintf($itemTpl, $item['Title'], $item['Description'], $item['PicUrl'], $item['Url']);
            }
            $xmlTpl = "<xml>
    <ToUserName><![CDATA[%s]]></ToUserName>
    <FromUserName><![CDATA[%s]]></FromUserName>
    <CreateTime>%s</CreateTime>
    <MsgType><![CDATA[news]]></MsgType>
    <ArticleCount>%s</ArticleCount>
    <Articles>
    $item_str</Articles>
    </xml>";
    
            $result = sprintf($xmlTpl, $object->FromUserName, $object->ToUserName, time(), count($newsArray));
            return $result;
        }
    
    
        //日志记录
        public function logger($log_content)
        {
            if(isset($_SERVER['HTTP_APPNAME'])){   //SAE
                sae_set_display_errors(false);
                sae_debug($log_content);
                sae_set_display_errors(true);
            }else if($_SERVER['REMOTE_ADDR'] != "127.0.0.1"){ //LOCAL
                $max_size = 10000;
                $log_filename = "log.xml";
                if(file_exists($log_filename) and (abs(filesize($log_filename)) > $max_size)){unlink($log_filename);}
                file_put_contents($log_filename, date('H:i:s')." ".$log_content."\r\n", FILE_APPEND);
            }
        }
    
    }
    ?>

[http_lbsyun.baidu.com_apiconsole_key]: http://lbsyun.baidu.com/apiconsole/key
[Center]: /images/20210813/ef30aef7ab854685a29957647ecb7e57.png