PHP를 Baidu 음성 인식 인터페이스에 연결하는 방법은 무엇입니까?

<?php
// 设置请求的URL
$url = 'https://vop.baidu.com/server_api';
// 设置参数
$params = array(
    'format' => 'pcm',
    'dev_pid' => 1536,
    'token' => 'YOUR_ACCESS_TOKEN',
    'cuid' => 'YOUR_CUID',
    'len' => filesize('path/to/your/audio/file.pcm'),
    'speech' => base64_encode(file_get_contents('path/to/your/audio/file.pcm')),
);
// 设置请求头部
$headers = array(
    'Content-Type: application/json',
    'Content-Length: ' . strlen(json_encode($params)),
);
// 初始化cURL
$ch = curl_init();
// 设置cURL选项
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($params));
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
// 发送HTTP请求
$response = curl_exec($ch);
// 关闭cURL
curl_close($ch);
// 处理响应结果
$result = json_decode($response, true);
if ($result && isset($result['result'])) {
    // 打印识别结果
    echo $result['result'][0];
} else {
    // 打印错误信息
    echo $result['err_msg'];
}
?>