php 使用curl调用chatGPT 2023-03-22

/**
 * @param $prefix   文本信息要查询的内容
 * @param $apiKey   apikey秘钥
 * @param int $length 默认20-50之间即可
 * @return int
 */
function calculateMaxTokens($prefix, $apiKey, $length = 50)
{
    // Create data payload with prompt and desired length
    $data = array(
        'model' => 'text-davinci-003',
        'prompt' => $prefix,
        'temperature' => 0.5,
        'max_tokens' => $length,
        'stop' => '\n',
    );

    // Set up cURL request with API key
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, 'https://api.openai.com/v1/completions');
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($data, 320));
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_HTTPHEADER, array(
        'Content-Type: application/json',
        'Authorization: Bearer ' . $apiKey,
    ));
    //跳过https证书验证
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
    //CURL_HTTP_VERSION_1_0 (强制使用 HTTP/1.0)或CURL_HTTP_VERSION_1_1 (强制使用 HTTP/1.1)
    curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);

    // Send request and parse response
    $response = curl_exec($ch);

    // Close cURL session and return result
    curl_close($ch);

    $responseArr = json_decode($response, true);
    $tokens = $responseArr['choices'][0]['finish_reason'] == 'stop' ? count(explode(' ', $responseArr['choices'][0]['text'])) : $length;

    return $tokens;
}