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PHP calling the iFlytek voice service

Recently I am working on a WeChat applet and need to do speech recognition, so I chose iFlytek Voice, which is well-known in China.
My background is PHP, and I went through some pitfalls during the access process. I share it here in the hope that it can help friends in need

Preparation

1. Apply for iFlytek account http://www.xfyun.cn/
   

2. Add IP whitelist (Effective in 5-10 minutes)

3. Prepare an audio file (wav or pcm format)

4. Get APPID and APPKEY (each The APPKEY of each service is different)

const APP_ID = 'xxxx';const APP_KEY_IAT = 'xxxx'; //语音听写APPKEYconst APP_KEY_ISE = 'xxxx'; //语音评测APPKEYconst APP_KEY_TTS = 'xxxx'; //语音合成APPKEY

Voice dictation

public function voiceIat($file_path){
    $param = [        'engine_type' => 'sms16k',        'aue' => 'raw'
    ];    $cur_time = (string)time();    $x_param = base64_encode(json_encode($param));    $header_data = [        'X-Appid:'.self::APP_ID,        'X-CurTime:'.$cur_time,        'X-Param:'.$x_param,        'X-CheckSum:'.md5(self::APP_KEY_IAT.$cur_time.$x_param),        'Content-Type:application/x-www-form-urlencoded; charset=utf-8'
    ];    //Body
    $file_path = $file_path;    $file_content = file_get_contents($file_path);    $body_data = 'audio='.urlencode(base64_encode($file_content));    //Request
    $url = "http://api.xfyun.cn/v1/service/v1/iat";    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_HEADER, 0);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
    curl_setopt($ch, CURLOPT_POST, TRUE);
    curl_setopt($ch, CURLOPT_HTTPHEADER, $header_data);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $body_data);    $result = curl_exec($ch);
    curl_close($ch);    return $result;
}

Voice dictation example:

voiceIat('a.wav');

Voice evaluation

public function voiceIse($file_path, $content){
    $param = [        'language' => 'cn',        'aue' => 'raw',        'category' => 'read_sentence'
    ];    $cur_time = (string)time();    $x_param = base64_encode(json_encode($param));    $header_data = [        'X-Appid:'.self::APP_ID,        'X-CurTime:'.$cur_time,        'X-Param:'.$x_param,        'X-CheckSum:'.md5(self::APP_KEY_ISE.$cur_time.$x_param),        'Content-Type:application/x-www-form-urlencoded; charset=utf-8'
    ];    //Body
    $file_path = $file_path;    $file_content = file_get_contents($file_path);    $body_data = 'audio='.urlencode(base64_encode($file_content)).'&text='.urlencode($content);    $url = "http://api.xfyun.cn/v1/service/v1/ise";    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_HEADER, 0);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
    curl_setopt($ch, CURLOPT_POST, TRUE);
    curl_setopt($ch, CURLOPT_HTTPHEADER, $header_data);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $body_data);    $result = curl_exec($ch);
    curl_close($ch);    return $result;
}

Voice evaluation example:

echo voiceIse('a.wav', '科大讯飞真给力');

Speech synthesis

public function voiceTts($content, $output_path){
    $param = [        'engine_type' => 'intp65',        'auf' => 'audio/L16;rate=16000',        'aue' => 'raw',        'voice_name' => 'xiaoyan',        'speed' => '0'
    ];    $cur_time = (string)time();    $x_param = base64_encode(json_encode($param));    $header_data = [        'X-Appid:'.self::APP_ID,        'X-CurTime:'.$cur_time,        'X-Param:'.$x_param,        'X-CheckSum:'.md5(self::APP_KEY_TTS.$cur_time.$x_param),        'Content-Type:application/x-www-form-urlencoded; charset=utf-8'
    ];    //Body
    $body_data = 'text='.urlencode($content);    //Request
    $url = "http://api.xfyun.cn/v1/service/v1/tts";    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_HEADER, TRUE);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
    curl_setopt($ch, CURLOPT_POST, TRUE);
    curl_setopt($ch, CURLOPT_HTTPHEADER, $header_data);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $body_data);    $result = curl_exec($ch);    $res_header_size = curl_getinfo($ch, CURLINFO_HEADER_SIZE);    $res_header = substr($result, 0, $res_header_size);
    curl_close($ch);    if(stripos($res_header, 'Content-Type: audio/mpeg') === FALSE){ //合成错误
        return substr($result, $res_header_size);
    }else{
        file_put_contents($output_path, substr($result, $res_header_size));        return '语音合成成功，请查看文件！';
    }
}

Speech synthesis example:

echo voiceTts('科大讯飞真给力', 'a.wav');

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