How to use PHP to implement the material download function of public accounts

How to use PHP to implement the material download function of public accounts requires specific code examples

With the popularity of WeChat public accounts, more and more developers are beginning to pay attention The material download function of the public account. The material download function refers to the function of downloading pictures, videos, audio and other materials in the public account to the local server through the interface provided by the public account developer platform. This article will introduce how to use PHP to implement the material download function of public accounts and provide detailed code examples.

Step 1: Obtain access_token
First, we need to obtain access_token, which is used to call the interface to obtain materials. access_token is the globally unique interface calling credential of the public account and is valid for 2 hours.

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

Be careful to replace your_appid and your_appsecret with your actual values.

Step 2: Obtain the material list
Using the interface for obtaining the material list, we can obtain the media_id and file type of all materials in the public account.

$url = "https://api.weixin.qq.com/cgi-bin/material/batchget_material?access_token={$access_token}";
$data = array(
    'type' => 'image',
    'offset' => 0,
    'count' => 20
);
$data = json_encode($data);
$response = http_post_data($url, $data);
$result = json_decode($response, true);

Among them, type is the type of material, which can be image, video, voice, news, etc. offset is the starting position of the material list, count is the number of acquired materials.

Step 3: Download materials
After obtaining the material list, we can download the specific material files through media_id.

$url = "https://api.weixin.qq.com/cgi-bin/material/get_material?access_token={$access_token}";
$data = array(
    'media_id' => $media_id
);
$data = json_encode($data);
$response = http_post_data($url, $data);

Among them, media_id is the unique identifier of the material.

Step 4: Save the material to local
Finally, we save the downloaded material to the local server.

file_put_contents('path_to_save', $response);

Among them, path_to_save is the path and file name of the saved file.

Complete code example:

 $media_id
    );
    $data = json_encode($data);
    $response = http_post_data($url, $data);

    file_put_contents('path_to_save', $response);
}

The above are all the steps and code examples for using PHP to implement the public account material download function. Through the above steps, you can easily download the materials in the official account to the local server. Remember to replace your_appid, your_appsecret and path_to_save in the code with your actual values. If you have any questions, you can refer to the WeChat official account developer documentation or leave a message for discussion.

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