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;
 }
 }
 ?>