微信公眾號開發之語音消息識別

1.開通語音識別（預設關閉）

2.語音識別

請註意，開通語音識別後，用戶每次發送語音給公眾號時，微信會在推送的語音消息XML數據包中，增加一個Recognition欄位（註：由於客戶端緩存，開發者開啟或者關閉語音識別功能，對新關註者立刻生效，對已關註用戶需要24小時生效。開發者可以重新關註此帳號進行測試）。開啟語音識別後的語音XML數據包如下：

  1 <?php
  2 /**
  3   * wechat php test
  4   */
  5 
  6 //define your token
  7 define("TOKEN", "weixin");
  8 $wechatObj = new wechatCallbackapiTest();
  9 //$wechatObj->valid();//介面驗證
 10 $wechatObj->responseMsg();//調用回覆消息方法
 11 class wechatCallbackapiTest
 12 {
 13     public function valid()
 14     {
 15         $echoStr = $_GET["echostr"];
 16 
 17         //valid signature , option
 18         if($this->checkSignature()){
 19             echo $echoStr;
 20             exit;
 21         }
 22     }
 23 
 24     public function responseMsg()
 25     {
 26         //get post data, May be due to the different environments
 27         $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];
 28 
 29           //extract post data
 30         if (!empty($postStr)){
 31                 /* libxml_disable_entity_loader is to prevent XML eXternal Entity Injection,
 32                    the best way is to check the validity of xml by yourself */
 33                 libxml_disable_entity_loader(true);
 34                   $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);
 35                 $fromUsername = $postObj->FromUserName;
 36                 $toUsername = $postObj->ToUserName;
 37                 $keyword = trim($postObj->Content);
 38                 $time = time();
 39                 $msgType = $postObj->MsgType;//消息類型
 40                 $event = $postObj->Event;//時間類型，subscribe（訂閱）、unsubscribe（取消訂閱）
 41                 
 42                 $textTpl = "<xml>
 43                             <ToUserName><![CDATA[%s]]></ToUserName>
 44                             <FromUserName><![CDATA[%s]]></FromUserName>
 45                             <CreateTime>%s</CreateTime>
 46                             <MsgType><![CDATA[%s]]></MsgType>
 47                             <Content><![CDATA[%s]]></Content>
 48                             <FuncFlag>0</FuncFlag>
 49                             </xml>"; 
 50                            
 51                 switch($msgType){
 52                     case "event":
 53                     if($event=="subscribe"){
 54                         $contentStr = "Hi,歡迎關註海仙日用百貨!"."\n"."回覆數字'1',瞭解店鋪地址."."\n"."回覆數字'2',瞭解商品種類.";
 55                     } 
 56                     break;
 57                     case "text"://文本消息
 58                         switch($keyword){
 59                             case "1":
 60                             $contentStr = "店鋪地址："."\n"."杭州市江干區.";    
 61                             break;
 62                             case "2":
 63                             $contentStr = "商品種類:"."\n"."杯子、碗、棉簽、水桶、垃圾桶、洗碗巾(刷)、拖把、掃把、"
 64                                          ."衣架、粘鉤、牙簽、垃圾袋、保鮮袋(膜)、剪刀、水果刀、飯盒等.";
 65                             break;
 66                             default:
 67                             $contentStr = "對不起,你的內容我會稍後回覆";
 68                         }
 69                     break;
 70                     case "voice"://語音消息
 71                     //語音識別
 72                     $recognition = $postObj->Recognition;
 73                     $format = $postObj->Format;
 74                     $contentStr = "你發送的是語音消息"."\n"."語音格式為:"."\n".$format."\n"."語音內容為:"."\n".$recognition;
 75                     break;
 76                 }
 77                 $msgType = "text";
 78                 $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr);
 79                 echo $resultStr;
 80         }else {
 81             echo "";
 82             exit;
 83         }
 84     }
 85         
 86     private function checkSignature()
 87     {
 88         // you must define TOKEN by yourself
 89         if (!defined("TOKEN")) {
 90             throw new Exception('TOKEN is not defined!');
 91         }
 92         
 93         $signature = $_GET["signature"];
 94         $timestamp = $_GET["timestamp"];
 95         $nonce = $_GET["nonce"];
 96                 
 97         $token = TOKEN;
 98         $tmpArr = array($token, $timestamp, $nonce);
 99         // use SORT_STRING rule
100         sort($tmpArr, SORT_STRING);
101         $tmpStr = implode( $tmpArr );
102         $tmpStr = sha1( $tmpStr );
103         
104         if( $tmpStr == $signature ){
105             return true;
106         }else{
107             return false;
108         }
109     }
110 }
111 
112 
113 ?>