我正在尝试使用 chatGPT API，但查询给出未定义的输出

Question

我使用 chatGPT API，php 代码运行良好。但是，当我想将查询打印到屏幕上时，我得到了未定义。

开发者控制台显示响应如下

我用来将输出打印到屏幕的javascript代码如下。

<script>
    const input = document.querySelector('.askMe');
    const button = document.querySelector('.getAnswer');
    const textarea = document.querySelector('.answerHere');

    var communicator = '';
    button.onclick = () => {
      var prompt = input.value
          if(prompt != ''){
             bottomScroll();
             //to get server Events
             var source = new SSE("myai.php?prompt=" + prompt);
             input.value = ''
             input.focus()
             source.addEventListener('message', function (e) {
                 if(e.data){
                    if(e.data != '[DONE]'){
                       var tokens = JSON.parse(e.data).choices[0].text
                       textarea.innerHTML += tokens
                       bottomScroll();
                    }else{
                       console.log('Completed');
                    }
                 }
              })
              source.stream()
           }
     }

     function bottomScroll(){
         textarea.scrollIntoView(false)
         textarea.scrollTo(0, textarea.scrollHeight)
     }
         </script>

myai.php文件中我的代码如下

$API_KEY = "API-KEY";

$model = 'gpt-3.5-turbo';
$header = [
    "Authorization: Bearer " . $API_KEY,
    "Content-type: application/json",
];

$temperature = 0.6;
$frequency_penalty = 0;
$presence_penalty= 0;
$prompt = 'Hi ?';

//$messages = array(array('role' => 'assistant','content' => $prompt));

$messages = array(
    array(
    "role" => "user",
    "content" => $prompt
    )
    );
//Turbo model
$isTurbo = true;
$url = "https://api.openai.com/v1/chat/completions";
$params = json_encode([
    "messages" => $messages,
    "model" => $model,
    "temperature" => $temperature,
    "max_tokens" => 1024,
    "frequency_penalty" => $frequency_penalty,
    "presence_penalty" => $presence_penalty,
    "stream" => true
]);

$curl = curl_init($url);
$options = [
    CURLOPT_POST => true,
    CURLOPT_HTTPHEADER => $header,
    CURLOPT_POSTFIELDS => $params,
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_SSL_VERIFYPEER => false,
    CURLOPT_SSL_VERIFYHOST => 0,
    CURLOPT_WRITEFUNCTION => function($curl, $data) {
        //echo $curl;
        $httpCode = curl_getinfo($curl, CURLINFO_HTTP_CODE);

        if ($httpCode != 200) {
           $r = json_decode($data);
           echo 'data: {"error": "[ERROR]","message":"'.$r->error->message.'"}' . PHP_EOL;
        }else{
            echo $data;
            echo PHP_EOL;
            ob_flush();
            flush();
            return strlen($data);
        }
    },
];

curl_setopt_array($curl, $options);
$response = curl_exec($curl);

if ($response === false) {
    echo 'data: {"error": "[ERROR]","message":"'.curl_error($curl).'"}' . PHP_EOL;
}else{

}

为什么它根据这些条件给出未定义的输出以及解决方案是什么。你能帮帮我吗？

我认为我遇到的错误是在 myai.php 文件的

$options

部分。但我不确定。