本文实例为大家分享了PHP微信语音消息识别代码，供大家参考，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：

<div class="jb51code">
<pre class="brush:PHP;">
<?php
/**

• wechat php test
  */

//define your token
define("TOKEN","weixin");
$wechatObj = new wechatCallbackapiTest();
//$wechatObj->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 = "<xml>
   <ToUserName><![CDATA[%s]]></ToUserName>
   <FromUserName><![CDATA[%s]]></FromUserName>
   <CreateTime>%s</CreateTime>
   <MsgType><![CDATA[%s]]></MsgType>
   <Content><![CDATA[%s]]></Content>
   <FuncFlag>0</FuncFlag>
   </xml>"; 

switch($msgType){
 case "event":
 if($event=="subscribe"){
  $contentStr = "Hi,欢迎关注海仙日用百货!"."\n"."<a href="/tag/huifu/" target="_blank" class="keywords">回复</a>数字'1',了解店铺地址."."\n"."<a href="/tag/huifu/" target="_blank" class="keywords">回复</a>数字'2',了解商品种类.";
 } 
 break;
 case "text"://文本消息
  switch($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、<a href="/tag/laji/" target="_blank" class="keywords">垃圾</a>桶、洗碗巾(刷)、拖把、扫把、"
       ."衣架、粘钩、牙签、<a href="/tag/laji/" target="_blank" class="keywords">垃圾</a>袋、保鲜袋(膜)、剪刀、水果刀、饭盒等.";
   break;
   default:
   $contentStr = "对不起,你的<a href="/tag/neirong/" target="_blank" class="keywords">内容</a>我会稍后<a href="/tag/huifu/" target="_blank" class="keywords">回复</a>";
  }
 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<a href="/tag/neirong/" target="_blank" class="keywords">内容</a>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;
}
}
}

?>