微信的录音文件上传到微信服务器上，只能保存三天。 因此需要做一个转存到自己服务器，或者七牛云的操作。

转存到自己服务器

1. 调用微信JSSDK API 录音， 录音结束，上传到微信服务器，获取录音文件的 media_id
2. 根据 media_id 下载录音文件（amr）格式
3. 转存到自己服务器（amr需要转码成mp3） 或者 七牛云(有转码功能)

步骤1代码

     .../*** 开始录音[省略了一部分代码]*/startRecord: function() {var that = this;if (!that._startRecordFlag) {typeof wx !== "undefined" && wx.startRecord({success: function(res) {Logger.log("res", res)if (res.errMsg == 'startRecord:ok') {Logger.log("正在开始录音....")that._startTime = new Date().getTime();}}});}},/*** 结束录音,并上传*/stopRecord: function() {that._startRecordFlag = false;typeof wx !== "undefined" && wx.stopRecord({success: function(res) {//上传录音wx.uploadVoice({localId: res.localId,isShowProgressTips: 1,success: function(resUpload) {//下载录音文件到服务器，转存起来Model.downloadRecordAudio(resUpload.serverId, function(result) {console.log(resUpload.serverId, result.path)that.attachment = result.path;// that.attachment = resUpload.serverId;that.stopRecordCallback && that.stopRecordCallback();})}});}});},
...

步骤2代码

<?php
//处理方法，
upload();//media_id为微信jssdk接口上传后返回的媒体id
function upload(){$media_id = $_POST["media_id"];$access_token = getAccessToken();$path = "./weixinrecord/";   //保存路径，相对当前文件的路径$outPath = "./php/weixinrecord/";  //输出路径，给show.php 文件用，上一级if(!is_dir($path)){mkdir($path);}//微 信上传下载媒体文件$url = "http://file.api.weixin.qq.com/cgi-bin/media/get?access_token={$access_token}&media_id={$media_id}";$filename = "wxupload_".time().rand(1111,9999).".amr";downAndSaveFile($url,$path."/".$filename);$data["path"] = $outPath.$filename;$data["msg"] = "download record audio success!";// $data["url"] = $url;echo json_encode($data);
}//获取Token
function getAccessToken() {//  access_token 应该全局存储与更新，以下代码以写入到文件中做示例$data = json_decode(file_get_contents("./access_token.json"));if ($data->expire_time < time()) {$appid = "youappid";  //自己的appid$appsecret = "youappsecret";  //自己的appsecret$url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid={$appid}&secret={$appsecret}";$res = json_decode(httpGet($url));$access_token = $res->access_token;if ($access_token) {$data->expire_time = time() + 7000;$data->access_token = $access_token;$fp = fopen("./access_token.json", "w");fwrite($fp, json_encode($data));fclose($fp);}}else {$access_token = $data->access_token;}return $access_token;
}//HTTP get 请求
function httpGet($url) {$curl = curl_init();curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);curl_setopt($curl, CURLOPT_TIMEOUT, 500);curl_setopt($curl, CURLOPT_URL, $url);$res = curl_exec($curl);curl_close($curl);return $res;
}//根据URL地址，下载文件
function downAndSaveFile($url,$savePath){ob_start();readfile($url);$img  = ob_get_contents();ob_end_clean();$size = strlen($img);$fp = fopen($savePath, 'a');fwrite($fp, $img);fclose($fp);
}
?>

步骤3代码【略】

目前没有使用七牛云，因此该部分代码，参考七牛云官网