## 對話聊天API核心代碼如下所示
##### 看起來很簡單，沒什么業務邏輯，就兩個參數
>[info]
> $Questionmessage ：你給機器人發的消息，僅限文字
$context：你跟機器人對話的內容上下文，每次都會拼接，這樣機器人會根據你最近的五條對話來回答你接下來的問題，讓機器人看起來顯得沒那么笨笨的感覺。但是有一個前提，<span style="color:red">這個開啟會導致費用增加
</span>返回的結果，需要轉string格式。在前面加一個 `（string）` 即可。
```
/**
* @return void
* @throws \Exception
* 消息
*/
public function ChatGPT($Questionmessage, $context = "[]")
{
$open_ai = new OpenAi(config("site.key"));
// 設置默認的請求文本prompt
$prompt = "這是前置內容，每次提交都伴隨此，可以改為空\n\n";
$version = "text-davinci-003";
if (empty($context)) {
// 如果沒有內容，下面是默認內容
$prompt .= "
Question:\n'我問你個問題，你告訴我答案OK嗎？
\n\nAnswer:\n好
\n\n Question:\n'請你輸入你的問題
\n\nAnswer:\n 輸入問題后可以獲取答案
";
$please_use_above = "";
} else {
// 將上次的問題和答案作為問題進行提交
$prompt .= "";
$context = array_slice($context, -5);
foreach ($context as $message) {
$prompt .= "Question:\n" . $message[0] . "\n\nAnswer:\n" . $message[1] . "\n\n";
}
$please_use_above = ". Please use the questions and answers above as context for the answer.";
}
// add new question to prompt
$prompt = $prompt . "Question:\n" . $Questionmessage . $please_use_above . "\n\nAnswer:\n\n";
// add new question to prompt
$prompt = $prompt . "Question:\n" . $Questionmessage . $please_use_above . "\n\nAnswer:\n\n";
// create a new completion
$complete = json_decode($open_ai->completion([
'model' => $version,
'prompt' => $prompt,
'temperature' => 0.9,
'max_tokens' => 2000, //最大字符數，建議別改大了
'top_p' => 1,
'frequency_penalty' => 0,
'presence_penalty' => 0,
'stop' => [
"\nNote:",
"\nQuestion:"
]
]));
// get message text
if (isset($complete->choices[0]->text)) {
$text = str_replace("\\n", "\n", $complete->choices[0]->text);
} elseif (isset($complete->error->message)) {
$text = $complete->error->message;
} else {
$text = "Sorry, but I don't know how to answer that.";
}
return (string)$text;
}
```