PHP微信开发：如何实现语音识别

function voice2text($media_id)
{
    $access_token = get_access_token(); // 获取access_token
    $url = 'https://api.weixin.qq.com/cgi-bin/media/get?access_token='.$access_token.'&media_id='.$media_id;

    // 发送请求获取语音文件
    $response = Http_request($url);
    $header = $response['header'];
    $body = $response['body'];

    // 从响应中获取文件链接
    preg_match('/.*?amr/',$header,$match);
    $file_url = $match[0];
    $file_content = fread(fopen($file_url,'r'),filesize($file_url));

    // 通过API实现语音识别
    $url = 'https://api.weixin.qq.com/cgi-bin/media/voice/addvoicetorecofortext?access_token='.$access_token.'&fORMat=amr&voice_id='.$media_id;
    $post_data = '{voice:{"media_id":"'.$media_id.'"}}';

    $response = http_request($url,'POST',$post_data);

    // 解析响应，提取识别结果
    $text_result = JSON_decode($response, true);
    $content = $text_result['content'];

    return $content;
}

// CURL function
function http_request($url,$method='GET',$data=null)
{
    $curl = curl_init();
    curl_setopt($curl,CURLOPT_RETURNTRANSFER,true);
    curl_setopt($curl,CURLOPT_TIMEOUT,5000);
    curl_setopt($curl,CURLOPT_SSL_VERIFYPEER,false);
    curl_setopt($curl,CURLOPT_SSL_VERIFYHOST,false);

    switch ($method) {
        case 'GET':
            curl_setopt($curl,CURLOPT_URL,$url);
            break;
        case 'POST':
            curl_setopt($curl,CURLOPT_URL,$url);
            curl_setopt($curl,CURLOPT_POST,true);
            if (!empty($data)) {
                curl_setopt($curl,CURLOPT_POSTFIELDS,$data);
            }
            break;
        default:
            break;
    }

    $response['body'] = curl_exec($curl);
    $response['header'] = curl_getinfo($curl);

    curl_close($curl);

    return $response;
}