Laravel8 ChatGPTのAPIをコールするサンプルコード

public function chat(Request $request)
{
    $api_key = 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx';    // OpenAIのAPIキーをセット
    $content = '日本の首都はどこですか？';                // 質問を記述

    $url = 'https://api.openai.com/v1/chat/completions';

    $data = array(
        'model' => 'gpt-3.5-turbo',
        'max_tokens' => 100,
        "messages" => [
            ["role" => "user", "content" => $content]
        ],
    );

    $headers = array(
        'Content-Type: application/json',
        'Authorization: Bearer ' . $api_key
    );

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($data));
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);

    $response = curl_exec($ch);

    $result = json_decode($response, true);
dd($result['choices'][0]['message']['content']);

}