PHPでOpenAI APIを使ってみた

<?php

$apiKey = '作成したApi Keyを指定してください';

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

$data = [
    "model" => "gpt-3.5-turbo", // gpt-4でも可（有料）
    "messages" => [
        [
            "role" => "system",
            "content" => "PHPについて回答してください。"
        ],
        [
            "role" => "user",
            "content" => "PHPで一番使いやすいフレームワークを教えてください。"
        ]
    ]
];

$ch = curl_init($endpoint);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, [
    'Content-Type: application/json',
    'Authorization: Bearer ' . $apiKey
]);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($data));

$response = curl_exec($ch);
$httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);

if ($httpCode !== 200) {
    echo "APIエラー（HTTPコード $httpCode）\n";
    echo "レスポンス：$response\n";
    exit;
}

$responseData = json_decode($response, true);
echo "ChatGPTの回答:\n";
echo $responseData['choices'][0]['message']['content'];
?>

$pdfText = ''; // PDFのテキストをここに格納
$data = [
    "model" => "gpt-4",
    "messages" => [
        [
            "role" => "system",
            "content" => "以下の資料に基づいて質問に答えてください：\n" . $pdfText
        ],
        [
            "role" => "user",
            "content" => "福利厚生について教えてください"
        ]
    ]
];