微信公众平台开发之天气预报功能


            最近有项目需求给微信公众号上增加了天气预报功能,使用百度提供的车联网API V3.0中的天气查询功能实现.先上一张最终效果图:



项目需求：有连接好的微信平台,有百度注册帐号,需要在百度LBS开放云平台,添加应用,获取AK代码，PHP代码编辑器,如EditPlus等

下面详细介绍下开发步骤：

第一步：准备工作



      登录微信公众平台,检查服务器配置是否已启用,URL(服务器地址) 是否已配置Token(令牌),与自己写的微信入口文件中的Token(令牌一致),如下图:然后点击提交,只至网页上提示绿色背景的提交成功信息,则完成本步骤的操作





第二步：微信天气预报数据源准备



      用已注册好的百度帐号,登录百度LBS云平台,添加一个应用,获取访问应用AK，及了解车联API V3.0,天气查询功能相应的接口说明文件,以按需调用需要的天气信息.



第三步：微信公众平台，接口文件编写 jiekou.php





<?php

/*

 无忧电脑技巧网 微信公众号功能源码

 CopyRight 2015 All Rights Reserved

*/

define("TOKEN", "weixin2015");

$wechatObj = new wechatCallbackapiTest();

if (!isset($_GET['echostr'])) {

 $wechatObj->responseMsg();

}else{

 $wechatObj->valid();

}

class wechatCallbackapiTest

{

 //验证签名

 public function valid()

 {

 $echoStr = $_GET["echostr"];

 $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){

  echo $echoStr;

  exit;

 }

 }

 public function responseMsg()

 {

 // $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];

 $postStr = file_get_contents("php://input");

 if (!empty($postStr)){

  $this->logger("R ".$postStr);

  $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);

  $RX_TYPE = trim($postObj->MsgType);

 $result = "";

  switch ($RX_TYPE)

  {

  case "event":

   $result = $this->receiveEvent($postObj);

   break;

  case "text":

   $result = $this->receiveText($postObj);

   break;

  }

  $this->logger("T ".$result);

  echo $result;

 }else {

  echo "";

  exit;

 }

 }

 private function receiveEvent($object)

 {

 switch ($object->Event)

 {

  case "subscribe":

  $content = "欢迎关注无忧电脑技巧网 ";

  break;

 }

 $result = $this->transmitText($object, $content);

 return $result;

 }

 private function receiveText($object)

 {

 $keyword = trim($object->Content); //获得用户输入的信息

 //判断天气

 if(!empty( $keyword )){ //!empty 函数,判断 $keyword获得的值是否为空

 $city = mb_substr($keyword, 0, 2, 'utf-8'); //取用户输入内容前两个字符,如"黄冈天气" 最终取值"黄冈"

 include("weather.php"); //调用天气接口文件

 $content = getWeatherInfo($city); //执行天气接口文件中的 getWeatherInfo方法.查询 黄冈天气.

 } else{

 $content = date("Y-m-d H:i:s",time())."\n技术支持 无忧电脑技巧网\nwww.51pcjq.com"; //发送其它内容默认回复的内容.

 }

 if(is_array($content)){

 if (isset($content[0]['PicUrl'])){

  $result = $this->transmitNews($object, $content);

 }else if (isset($content['MusicUrl'])){

  $result = $this->transmitMusic($object, $content);

 }

 }else{

 $result = $this->transmitText($object, $content);

 }

 return $result;

 }

 private function transmitText($object, $content)

 {

 if (!isset($content) || empty($content)){

 return "";

 }

 $textTpl = "<xml>

<ToUserName><![CDATA[%s]]></ToUserName>

<FromUserName><![CDATA[%s]]></FromUserName>

<CreateTime>%s</CreateTime>

<MsgType><![CDATA[text]]></MsgType>

<Content><![CDATA[%s]]></Content>

</xml>";

 $result = sprintf($textTpl, $object->FromUserName, $object->ToUserName, time(), $content);

 return $result;

 }

 private 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']);

 }

 $newsTpl = "<xml>

<ToUserName><![CDATA[%s]]></ToUserName>

<FromUserName><![CDATA[%s]]></FromUserName>

<CreateTime>%s</CreateTime>

<MsgType><![CDATA[news]]></MsgType>

<Content><![CDATA[]]></Content>

<ArticleCount>%s</ArticleCount>

<Articles>

$item_str</Articles>

</xml>";

 $result = sprintf($newsTpl, $object->FromUserName, $object->ToUserName, time(), count($newsArray));

 return $result;

 }

 private function logger($log_content)

 {

 }

}





第四步:使用百度车联API V3.0接口,及访问应用AK码,编号微信天气接口源码:

weatger.php







<?php

function getWeatherInfo($cityName){ 

if ($cityName == "" || (strstr($cityName, "+"))){ 

return "发送天气+城市，例如'天气深圳'"; }//用户查询天气,回复关键词 规则 

$url = "http://api.map.baidu.com/telematics/v3/weather?location=".urlencode($cityName)."&output=json&ak=自已申请的百度车联API AK代码";//构建通过百度车联API V3.0查询天气url链接 

$ch = curl_init();//初始化会话 curl_setopt($ch, CURLOPT_URL, $url);//设置会话参数 curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);//设置会话参数 $output = curl_exec($ch);//执行curl会话 

curl_close($ch);//关闭curl会话 

$result = json_decode($output, true);//函数json_decode() 的功能时将json数据格式转换为数组。

 if ($result["error"] != 0){ 

 return $result["status"]; } 

 $curHour = (int)date('H',time()); 

 $weather = $result["results"][0];//按照微信公众号开发文档,组建设多图文回复信息 

 $weatherArray[] = array("Title" => $weather['currentCity']."当前天气:"."温度:".$weather['weather_data'][0]['temperature'].",".$weather['weather_data'][0]['weather'].","."风力:".$weather['weather_data'][0]['wind'].".", "Description" =>"", "PicUrl" =>"http://weixin.51pcjq.com/img/weather_bg.jpg", "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;}?>





注意事项

微信公众平台 TOKEN 与自己编写的微信接口文件中的 TOKEN 的值必须保持一致

编写php代码,需使用专业的php编辑工具,如EditPlus,Dreamweaver等

上述天气接口文件中,百度车联api AK代码已换成 "自已申请的百度车联API AK代码:请申请好后,自行填入

如要不明白的地方,可以关注我的百度空间.留言和我联系!

微信天气预报开发最新代码：





 <meta http-equiv="Content-Type" content="text/html; charset=utf" />

 <?php

 header("Content-Type:text/html;charset=UTF-");

 date_default_timezone_set("PRC");

 /**

 * 最开始用的是微信提供的demo老是不成功，用了这个网上下载的才成功

 */

 

 //define your token

 define("TOKEN", "djjc");

 $wechatObj = new wechatCallbackapiTest();

 //微信接入操作，成功接入了直接注释了就行了

 $wechatObj->responseMsg();

 //$wechatObj->valid();

 

 class wechatCallbackapiTest

 {

 /*public function valid()

 {

 $echoStr = $_GET["echostr"];

 

 //valid signature , option

 if($this->checkSignature()){

 echo $echoStr;

 exit;

 }

 }*/

 

 public function responseMsg()

 {

 //get post data, May be due to the different environments

 $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];

 

 //extract post data

 if (!empty($postStr)){

 

 $postObj = simplexml_load_string($postStr, ‘SimpleXMLElement‘, LIBXML_NOCDATA);

 $RX_TYPE = trim($postObj->MsgType);

 

 switch($RX_TYPE)

 {

 case "text":

 $resultStr = $this->handleText($postObj);

 break;

 case "event":

 $resultStr = $this->handleEvent($postObj);

 break;

 default:

 $resultStr = "Unknow msg type: ".$RX_TYPE;

 break;

 }

 echo $resultStr;

 }else {

 echo "";

 exit;

 }

 }

 //测试文字回复

 public function handleText($postObj)

 {

 $fromUsername = $postObj->FromUserName;

 $toUsername = $postObj->ToUserName;

 $keyword = trim($postObj->Content);

 $time = time();

 $textTpl = "<xml>

 <ToUserName><![CDATA[%s]]></ToUserName>

 <FromUserName><![CDATA[%s]]></FromUserName>

 <CreateTime>%s</CreateTime>

 <MsgType><![CDATA[%s]]></MsgType>

 <Content><![CDATA[%s]]></Content>

 <FuncFlag></FuncFlag>

 </xml>"; 

 if(!empty( $keyword ))

 {

 $msgType = "text";

 switch($keyword){

 case "你好":

 $contentStr = "你好!";

 break;

 case "你叫什么名字":

 $contentStr = "我是顶尖机器人";

 break;

//判断是否为天气

 case $keywords+"天气";

 $str = mb_substr($keyword,-,,"UTF-");

 $str_key = mb_substr($keyword,,-,"UTF-");

 if($str=="天气"){

 $data = $this->weather($str_key)->showapi_res_body;

 $data=‘[今天白天]‘.$data->f->day_weather."\n";

 $data=‘[今天夜间]‘.$data->f->night_weather."\n";

 $data=‘[明天白天]‘.$data->f->day_weather."\n";

 $data=‘[明天夜间]‘.$data->f->night_weather."\n";

 $contentStr = $data.$data.$data.$data;

 }

 break;

 default:

 $contentStr = "听不懂您在讲什么";

 break; 

 }

 $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr);

 echo $resultStr;

 }else{

 echo "Input something...";

 }

 }

 

 public function handleEvent($object)

 {

 $contentStr = "";

 switch ($object->Event)

 {

 case "subscribe":

 $contentStr = "感谢您关注顶尖教程网，在这里您将得到海量免费学习资源！";

 break;

 default :

 $contentStr = "Unknow Event: ".$object->Event;

 break;

 }

 $resultStr = $this->responseText($object, $contentStr);

 return $resultStr;

 }

 

 public function responseText($object, $content)

 {

 $textTpl = "<xml>

 <ToUserName><![CDATA[%s]]></ToUserName>

 <FromUserName><![CDATA[%s]]></FromUserName>

 <CreateTime>%s</CreateTime>

 <MsgType><![CDATA[text]]></MsgType>

 <Content><![CDATA[%s]]></Content>

 <FuncFlag></FuncFlag>

 </xml>";

 $resultStr = sprintf($textTpl, $object->FromUserName, $object->ToUserName, time(), $content, $flag);

 return $resultStr;

 }

 

 private function checkSignature()

 {

 $signature = $_GET["signature"];

 $timestamp = $_GET["timestamp"];

 $nonce = $_GET["nonce"]; 

 

 $token = TOKEN;

 $tmpArr = array($token, $timestamp, $nonce);

 sort($tmpArr);

 $tmpStr = implode( $tmpArr );

 $tmpStr = sha( $tmpStr );

 

 if( $tmpStr == $signature ){

 return true;

 }else{

 return false;

 }

 }

 //天气预报 此处汉字需要处理，想了很多办法才没乱码

 private function weather($k){

 $n=urlencode($k);

 $showapi_appid = ‘‘; //去相关网站申请就行

 $showapi_sign = ‘deafcacefdea‘;

 $showapi_timestamp = date(‘YmdHis‘);

 $areaid=‘‘;

 $paramArr = ‘‘;

 $needHourData=‘‘;

 $url = iconv(‘gbk‘,‘utf-‘,‘http://route.showapi.com/-?‘.‘area=‘.$n.‘&areaid=&needHourData=&needIndex=&needMoreDay=&showapi_appid=‘.$showapi_appid.‘&showapi_timestamp=‘.$showapi_timestamp.‘&showapi_sign=‘.$showapi_sign); 

 $result = file_get_contents($url);

 $result = json_decode($result);

 return $result;

 }

 }

 ?>