How PHP implements multimedia material management in WeChat mini programs

With the popularity of WeChat mini programs, more and more developers have begun to explore how to implement multimedia material management in mini programs. As a commonly used server-side programming language, PHP can realize functions such as uploading, downloading, and managing multimedia materials in small programs.

The following will introduce how PHP implements multimedia material management in WeChat mini programs.

1. Types of multimedia materials in WeChat mini programs

Before implementing multimedia material management, you need to understand the several types of multimedia materials in WeChat mini programs:

1. Pictures: The mini program supports uploading pictures in JPG and PNG formats, but the size cannot exceed 2 MB.
2. Voice: The mini program supports uploading audio in AMR format, but the size cannot exceed 2 MB and the length cannot exceed 60 seconds.
3. Video: The mini program supports uploading videos in MP4 format, but the size cannot exceed 20 MB and the duration cannot exceed 10 minutes.
4. Thumbnail: used for video cover or music cover, supports JPG and PNG formats, and the size cannot exceed 64 KB.
5. File: The applet supports uploading files in the formats of doc, xls, ppt, pdf, docx, xlsx, pptx, zip, and rar, but the size does not exceed 10 MB.

2. Upload multimedia materials

1. Preparation work

Create a mini program on the WeChat public platform or open platform and obtain the mini program the appid and appsecret.

2. Get access_token

In PHP, request the WeChat interface to obtain the access_token through CURL or other methods. access_token is a globally unique ticket for calling the WeChat interface and needs to be re-obtained every two hours.

3. Upload multimedia materials

In PHP, you can use file_get_contents() or CURL to upload multimedia materials. It should be noted that the file needs to be Base64 encoded during the upload process to ensure the correctness of the file transfer process.

Interface call request description:

• HTTP request method: POST/FORM
• URL: https://api.weixin.qq.com/cgi-bin /media/upload?access_token=ACCESS_TOKEN&type=TYPE
• POST data format: multipart/form-data

Among them, ACCESS_TOKEN is the access_token obtained, and TYPE represents the type of uploaded file ( Corresponding to pictures, voices, videos, thumbnails and files respectively).

3. Download multimedia materials

In PHP, you can use file_get_contents() or CURL to download multimedia materials. It should be noted that the downloaded material files are returned in the form of binary streams.

Interface call request description:

• HTTP request method: GET
• URL: https://api.weixin.qq.com/cgi-bin/media /get?access_token=ACCESS_TOKEN&media_id=MEDIA_ID

Among them, MEDIA_ID represents the media_id of the material to be obtained, and ACCESS_TOKEN is the obtained access_token.

4. Management of multimedia materials

In PHP, you can use the interface provided by WeChat to manage multimedia materials, including querying, deleting and other operations of materials.

Interface call request description:

• HTTP request method: POST
• URL: https://api.weixin.qq.com/cgi-bin/material /batchget_material?access_token=ACCESS_TOKEN
• POST data format: JSON

Among them, ACCESS_TOKEN is the obtained access_token.

Through the above methods, PHP can realize the upload, download, management and other functions of multimedia materials in WeChat mini programs. At the same time, PHP can also interact with other languages ​​to achieve more complex multimedia material management.

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