PHP实现 Azure OpenAI ChatGPT 功能

Azure OpenAI 的接口和OpenAI有些不一样，大部分ChatGPT 客户端都是基于OpenAI的开发，以下是原生Azure OpenAI的实现方法。

class AzureOpenAI {

    private $ApiKey;//Azure OpenAI Key
    private $resourceName; // 自定义的域名
    private $modelName; // 自定义的模型名称
    private $apiVersion;//固定可不修改
    
    public function __construct($ApiKey,$resourceName,$modelName,$apiVersion="2023-03-15-preview")
    {
        $this->ApiKey = $ApiKey;
        $this->api = "https://$resourceName.openai.azure.com/openai/deployments/$modelName/chat/completions?api-version=$apiVersion";
    }
    
    private function response($data)
    {
        header("Access-Control-Allow-Origin: *");
        header("Content-Type: application/json");
        $callback = json_decode($data);
        if (isset($callback->choices[0]->message->content)){
            $text = trim(str_replace("\n", "", $callback->choices[0]->message->content));
        } elseif (isset($callback->error->message)) {
            $text = "服务器返回错误信息：" . $callback->error->message;
        } else {
            $text = "服务器超时或返回异常消息。";
        }
        echo json_encode(["message" => $text,"data" => $text,"status" => "success",]);
    }

    private function curl($postData)
    {
        $ApiKey = $this->ApiKey;
        $ch = curl_init();
        $headers  = [
        'Content-Type: application/json',
        'api-key:'.$ApiKey . ''
        ];
        $postData = json_encode($postData);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
        curl_setopt($ch, CURLOPT_URL,$this->api);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
        curl_setopt($ch, CURLOPT_POST, 1);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $postData);
        return curl_exec($ch);
    }

    public function chat()
    {
        $context = json_decode($_POST['context'] ?: "[]" ) ?: [];
        $post = [
            "model" => "gpt-3.5-turbo",
            "messages" => [],
        ];
        if(!empty($context)){
            $context = array_slice($context, -5);
            foreach( $context as $message ){
                $post['messages'][] = ['role' => 'user', 'content' => str_replace("\n", "\\n", $message[0])];
                $post['messages'][] = ['role' => 'assistant', 'content' => str_replace("\n", "\\n", $message[1])];
            }
        }
        $post['messages'][] = ['role' => 'user', 'content' => $_POST['message']];
        $data = $this->curl($post);
        return $this->response($data);
    }
}

使用：

$AzureOpenAI = new AzureOpenAI($ApiKey,$resourceName,$modelName);
$data = $AzureOpenAI->chat();
echo $data;

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