java代码
详见阿里巴巴录音转文字代码；

php代码

原php验证签名有误：：

首先json数据和java的json数据完全不一致>>>

解决方法：将java中的json数据打印出来 得到ascii码

<?php

$arr = [
    "app_key"=>"nls-service-telephone8khz",
    "oss_link"=>'http://aliyun-nls.oss.aliyuncs.com/asr/fileASR/examples/nls-sample.wav'
];




//echo $body;


//要命的构造
$body = '{'.chr(10).chr(9).'"app_key":"nls-service-telephone8khz",'.chr(10).chr(9).'"oss_link":"http://aliyun-nls.oss.aliyuncs.com/asr/fileASR/examples/nls-sample.wav"'.chr(10).'}';




//$body = '{"app_key":"nls-service-telephone8khz","oss_link":"http://aliyun-nls.oss.aliyuncs.com/asr/fileASR/examples/nls-sample.wav"}';

//$body = "{\"app_key\":\"nls-service-telephone8khz\",\"oss_link\":\"http://aliyun-nls.oss.aliyuncs.com/asr/fileASR/examples/nls-sample.wav\"}";

//echo base64_encode(md5($body,true));


$akId = "LTAIXRo6*****";
$akSecret = "LeoA5vwdnN******";
//
//更新api信息
$url = "https://nlsapi.aliyun.com/transcriptions";

//找不到数据
$arr = [
    "app_key"=>"nls-service-telephone8khz",
    "oss_link"=>'http://aliyun-nls.oss.aliyuncs.com/asr/fileASR/examples/nls-sample.wav'
];


$options = array(
    'http' => array(
        'header' => array(
            'accept'=> "application/json",
            'content-type'=> "application/json",
            'date'=> gmdate("D, d M Y H:i:s \G\M\T"),
            'authorization' => ''
        ),
        'method' => "POST", //可以是 GET, POST, DELETE, PUT
        'content' => $body //如有数据，请用json_encode()进行编码
    )
);

$http = $options['http'];
$header = $http['header'];
$urlObj = parse_url($url);

if(empty($urlObj["query"]))
    $path = $urlObj["path"];
else
    $path = $urlObj["path"]."?".$urlObj["query"];


$body = $http['content'];


if(empty($body))
    $bodymd5 = $body;
else
    $bodymd5 = base64_encode(md5($body,true));

//echo $bodymd5;

//这里也要改
$stringToSign = $http['method']."\n".$header['accept']."\n".$bodymd5."\n".$header['content-type']."\n".$header['date'];



$signature = base64_encode(hash_hmac("sha1",$stringToSign,$akSecret, true));

$authHeader = "Dataplus "."$akId".":"."$signature";

$options['http']['header']['authorization'] = $authHeader;

$options['http']['header'] = implode(
    array_map(
        function($key, $val){
            return $key.":".$val."\r\n";
        },
        array_keys($options['http']['header']),
        $options['http']['header']));
        
$context = stream_context_create($options);

$file = file_get_contents($url, false, $context );

echo($file);



/*
 * {
    "app_key": "***",
    "oss_link": "http://aliyun-nls.oss.aliyuncs.com/asr/fileASR/examples/nls-sample.wav",
    "auto_split":false,
    "vocabulary_id":"vocab_id",
    //valid_times是获取语音的指定时间段的识别内容，如果不需要，则不用填写
    "valid_times": [
        {
            "begin_time": 200,
            "end_time":2000,
            "channel_id": 0
        }
    ]
}
 */

/*
开始的错误 就是签名有误造成的
{"id":"3cd6e3d9c2884598b9aa3a38c03d7953","request_id":"3cd6e3d9c2884598b9aa3a38c03d7953","
 * error_code":80103,"error_message":"The authorization(Dataplus LTAIq9ZYotEshUP7:mN4iM8gk1q7ox6e7FVv3fINegZc=) 
 * of this request Invalid! {\"url\":\"/?accessKey=LTAIq9ZYotEshUP7&serviceCode=nls&api=authCheck3&token=12e8a7067e5977038095df899f016712\",
 * \"headers\":{\"accept\":\"application/json\",\"date\":\"Fri, 02 Mar 2018 01:50:56 GMT\",\"content-type\":\"application/json\",\"authorization\":\"Dataplus LTAIq9ZYotEshUP7:mN4iM8gk1q7ox6e7FVv3fINegZc=\"},
 * \"method\":\"POST\"}
{\"url\":\"/?accessKey=LTAIq9ZYotEshUP7&serviceCode=nls&api=authCheck3&token=12e8a7067e5977038095df899f016712\",\"headers\":{\"accept\":\"application/json\",\"date\":\"Fri, 02 Mar 2018 01:50:56 GMT\",\"content-type\":\"application/json\",\"authorization\":\"Dataplus LTAIq9ZYotEshUP7:mN4iM8gk1q7ox6e7FVv3fINegZc=\"},\"method\":\"POST\"}"}
 */