php微信开发之百度天气预报

本文实例为大家分享了php微信百度天气预报的开发代码，供大家参考，具体内容如下

1.登录百度ak申请：http://lbsyun.baidu.com/apiconsole/key

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]["data"]."\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);
  }
 } 

}
?> 

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