php如何实现微信公众号开发之语音消息识别

这篇文章主要介绍php如何实现微信公众号开发之语音消息识别，文中介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们一定要看完！

具体内容如下

1.开通语音识别（默认关闭）

2.语音识别

请注意，开通语音识别后，用户每次发送语音给公众号时，微信会在推送的语音消息XML数据包中，增加一个Recognition字段（注：由于客户端缓存，开发者开启或者关闭语音识别功能，对新关注者立刻生效，对已关注用户需要24小时生效。开发者可以重新关注此帐号进行测试）。开启语音识别后的语音XML数据包如下：

valid();//接口验证$wechatObj->responseMsg();//调用回复消息方法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)){    /* libxml_disable_entity_loader is to prevent XML eXternal Entity Injection,     the best way is to check the validity of xml by yourself */    libxml_disable_entity_loader(true);     $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);    $fromUsername = $postObj->FromUserName;    $toUsername = $postObj->ToUserName;    $keyword = trim($postObj->Content);    $time = time();    $msgType = $postObj->MsgType;//消息类型    $event = $postObj->Event;//时间类型，subscribe（订阅）、unsubscribe（取消订阅）        $textTpl = "                     %s                     0       ";            switch($msgType){     case "event":     if($event=="subscribe"){      $contentStr = "Hi,欢迎关注海仙日用百货!"."\n"."回复数字'1',了解店铺地址."."\n"."回复数字'2',了解商品种类.";     }      break;     case "text"://文本消息      switch($keyword){       case "1":       $contentStr = "店铺地址："."\n"."杭州市江干区.";        break;       case "2":       $contentStr = "商品种类:"."\n"."杯子、碗、棉签、水桶、垃圾桶、洗碗巾(刷)、拖把、扫把、"           ."衣架、粘钩、牙签、垃圾袋、保鲜袋(膜)、剪刀、水果刀、饭盒等.";       break;       default:       $contentStr = "对不起,你的内容我会稍后回复";      }     break;     case "voice"://语音消息     //语音识别     $recognition = $postObj->Recognition;     $format = $postObj->Format;     $contentStr = "你发送的是语音消息"."\n"."语音格式为:"."\n".$format."\n"."语音内容为:"."\n".$recognition;     break;    }    $msgType = "text";    $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr);    echo $resultStr;  }else {   echo "";   exit;  } }   private function checkSignature() {  // you must define TOKEN by yourself  if (!defined("TOKEN")) {   throw new Exception('TOKEN is not defined!');  }    $signature = $_GET["signature"];  $timestamp = $_GET["timestamp"];  $nonce = $_GET["nonce"];      $token = TOKEN;  $tmpArr = array($token, $timestamp, $nonce);  // use SORT_STRING rule  sort($tmpArr, SORT_STRING);  $tmpStr = implode( $tmpArr );  $tmpStr = sha1( $tmpStr );    if( $tmpStr == $signature ){   return true;  }else{   return false;  } }}?>

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