IBM Watson文本到语音PHP API问题：无法解码JSON对象

我当前的PHP代码似乎不适用于IBM Watson文本到语音

下面的代码返回以下输出：

{
   "code_description": "Bad Request", 
   "code": 400, 
   "error": "No JSON object could be decoded"
}"

我一直在添加和删除几个cURL选项，以使其工作，但它仍然返回前面提到的错误

<?php

$data="Hello World";

$ch = curl_init();

curl_setopt($ch, CURLOPT_POST, TRUE);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'POST');
curl_setopt($ch, CURLOPT_URL,"https://stream.watsonplatform.net/text-to-speech/api/v1/synthesize");
curl_setopt($ch, CURLOPT_USERPWD, "$USERNAME:$password");
curl_setopt($ch, CURLOPT_SAFE_UPLOAD, TRUE);
curl_setopt($ch, CURLOPT_POSTFIELDS,$data);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
curl_setopt($ch, CURLOPT_HEADER, TRUE);
curl_setopt($ch, CURLINFO_HEADER_OUT, TRUE);
curl_setopt($ch, CURLOPT_HTTPHEADER,
    array(
        "Content-Type: application/json",
        "Accept: audio/webm"
    )
);

$server_output = curl_exec($ch);

$status = curl_getinfo($ch, CURLINFO_HTTP_CODE);

$info = curl_getinfo($ch);

curl_close ($ch);

@blade19899

更改此行：

发件人：
curl_setopt（$ch，CURLOPT_USERPWD，“$USERNAME:$password”）

至：
curl_setopt（$ch，CURLOPT_USERPWD，base64_encode（$USERNAME:$password））

出于安全原因，授权标头中应包含base64字符串。希望这对你有帮助