PHP implementation of WeChat applet multi-voice effect techniques

With the development of mobile Internet, WeChat mini programs have become the preferred development platform for many enterprises and developers. In the process of mini program development, voice effects are a very important link. This article will introduce PHP techniques for implementing multi-voice effects in WeChat mini programs.

1. Basic introduction to the voice effects of the WeChat applet

In the WeChat applet, the realization of voice effects is mainly achieved through the API interface of the WeChat applet. It should be noted that the voice effects of WeChat mini programs are mainly divided into two types: speech synthesis and speech recognition.

1. Speech synthesis

The so-called speech synthesis is to convert text into speech for playback. In the WeChat applet, we can send the text that needs to be converted into speech to the WeChat server by calling the voice API interface of the WeChat applet, and obtain the returned voice file address and play it.

2. Speech recognition

Speech recognition is to convert speech into text, which is often used in scenarios such as voice input and voice search. In the WeChat applet, we can also call the voice API interface of the WeChat applet, send the voice file that needs to be recognized to the WeChat server, and obtain the returned text result, and then perform subsequent data processing.

2. How to implement the voice effect of the WeChat applet in PHP

The above mentioned two ways to implement the voice effect of the WeChat applet, so how do we call the WeChat applet voice effect in PHP? What about the voice API interface provided by the program to achieve voice effects? The specific steps are as follows:

1. Obtain access_token

When sending an API request to the WeChat server, we need to obtain an access_token first to obtain the permission to call the API. There are many ways to obtain access_token. This article will introduce a common method:

$appid = "你的小程序appid";
$secret = "你的小程序secret";
$url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=$appid&secret=$secret";
$res = file_get_contents($url);
$res = json_decode($res, true);
$access_token = $res['access_token'];

2. Call the speech synthesis API

After obtaining the access_token, we can call the WeChat applet to provide Speech synthesis API. The specific steps are as follows:

$url = "https://api.weixin.qq.com/cgi-bin/media/voice/addvoicetorecofortext?access_token=$access_token";
$data = array(
    'voice_text' => '需要合成语音的文字',
    'format' => 'mp3'
);
$data = json_encode($data);
$options = array(
    'http' => array(
        'method' => 'POST',
        'header' => "Content-type:application/json",
        'content' => $data,
        'timeout' => 60
    )
);
$context = stream_context_create($options);
$result = file_get_contents($url, false, $context);
$result = json_decode($result, true);
$voice_url = $result['voice_url'];

In the above code, we pass the text that needs to be synthesized into speech to the speech synthesis API, and specify the synthesis format as mp3. After getting the returned voice_url, we can get the address of the voice file and play it.

3. Call the speech recognition API

In addition to speech synthesis, we can also convert voice files into text by calling the speech recognition API provided by the WeChat applet. The specific steps are as follows:

$url = "https://api.weixin.qq.com/cgi-bin/media/voice/queryrecoresultfortext?access_token=$access_token";
$data = array(
    'voice_url' => '需要识别的语音文件地址'
);
$data = json_encode($data);
$options = array(
    'http' => array(
        'method' => 'POST',
        'header' => "Content-type:application/json",
        'content' => $data,
        'timeout' => 60
    )
);
$context = stream_context_create($options);
$result = file_get_contents($url, false, $context);
$result = json_decode($result, true);
$voice_text = $result['voice_text'];

In the above code, we pass the address of the voice file that needs to be recognized to the speech recognition API, and obtain the returned voice_text result for subsequent data processing.

3. Summary

Through the above introduction, I believe readers have already understood the method of using PHP to achieve voice effects in WeChat mini programs. It should be noted that during the actual development process, we need to make corresponding API calls and data processing according to specific scenarios and business needs. I hope this article can be helpful to everyone and bring more possibilities to the development and application of WeChat mini programs.

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