PHP实现对接百度语音识别接口的简单指南

<?php
// 1. 设置API Key和Secret Key
$apiKey = "YOUR_API_KEY";
$secretKey = "YOUR_SECRET_KEY";

// 2. 调用百度语音识别接口
function recognizeSpeech($audioFile) {
    global $apiKey, $secretKey;
    
    // 2.1 初始化Curl
    $ch = curl_init();
    
    // 2.2 设置请求参数
    $url = "http://vop.baidu.com/server_api";
    $cuid = "YOUR_CUID";
    $token = getToken(); // 获取Access Token
    
    // 2.3 设置Header
    $header = [
        "Content-Type: audio/wav;rate=16000",
        "cuid: ".$cuid,
        "token: ".$token
    ];
    
    // 2.4 设置请求选项
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
    curl_setopt($ch, CURLOPT_POSTFIELDS, file_get_contents($audioFile));
    
    // 2.5 发送请求并获取结果
    $result = curl_exec($ch);
    
    // 2.6 关闭Curl
    curl_close($ch);
    
    return $result;
}

// 3. 获取Access Token
function getToken() {
    global $apiKey, $secretKey;
    
    // 3.1 初始化Curl
    $ch = curl_init();
    
    // 3.2 设置请求参数
    $url = "https://openapi.baidu.com/oauth/2.0/token";
    $grantType = "client_credentials";
    $tokenUrl = $url."?grant_type=".$grantType."&client_id=".$apiKey."&client_secret=".$secretKey;
    
    // 3.3 设置请求选项
    curl_setopt($ch, CURLOPT_URL, $tokenUrl);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    
    // 3.4 发送请求并获取结果
    $result = curl_exec($ch);
    
    // 3.5 关闭Curl
    curl_close($ch);
    
    // 3.6 解析结果，获取Access Token
    $token = json_decode($result, true)["access_token"];
    
    return $token;
}

// 4. 调用语音识别函数并输出结果
$audioFile = "path/to/audio.wav";
$result = recognizeSpeech($audioFile);
echo $result;
?>

...
$audioFile = "path/to/audio.wav";
$result = recognizeSpeech($audioFile);
echo $result;
...