Method to generate and read QR codes for images using PHP and Qiniu Cloud Storage interface

Using PHP and Qiniu Cloud Storage Interface to Generate and Read QR Codes for Pictures

With the rapid development of the mobile Internet, QR codes have become a very commonly used method of information transmission. Way. In actual development, we often need to generate and parse QR codes. Next, we will use the PHP language combined with the Qiniu cloud storage interface to implement the method of generating and reading QR codes for images.

First, we need to register an account on the Qiniu cloud storage platform and create a space. Then, we need to build a PHP environment locally and introduce the SDK library of Qiniu Cloud Storage.

1. QR code generation
To generate QR code, we need to use an open source library of PHP - endroid/qrcode. We can install this library through Composer. Enter the following command on the command line to install:

composer require endroid/qrcode

After the installation is complete, we can start writing code. The specific steps are as follows:

1. Import library

   require_once 'vendor/autoload.php';
   use EndroidQrCodeQrCode;

2. Set the content of the QR code

   $data = 'https://www.example.com'; // 设置二维码中的内容

3. Create a QR code object

   $qrCode = new QrCode($data);

4. Save the QR code image

   $qrCode->writeFile('qrcode.png'); // 保存为文件

2. Upload the image to Qiniu Cloud Storage
When we After successfully generating the QR code image, we next need to upload the image to Qiniu Cloud Storage for subsequent use. We need to create a new space on Qiniu Cloud Storage and obtain AccessKey and SecretKey as upload credentials.

The following is a code example for us to implement image upload:

1. Import library

   require_once 'vendor/autoload.php';
   use QiniuAuth;
   use QiniuStorageUploadManager;

2. Set credential parameters

   $accessKey = 'Your_Access_Key'; // 替换成你的AccessKey
   $secretKey = 'Your_Secret_Key'; // 替换成你的SecretKey
   $bucket = 'Your_Bucket'; // 替换成你的空间名称
   $auth = new Auth($accessKey, $secretKey);

3. Generate upload credentials

   $upToken = $auth->uploadToken($bucket);

4. Upload pictures

   $filePath = 'qrcode.png'; // 本地二维码图片路径
   $key = 'qrcode.png'; // 上传到七牛云存储的文件名
   $uploadMgr = new UploadManager();
   list($ret, $err) = $uploadMgr->putFile($upToken, $key, $filePath);

3. Read QR code pictures
The last step is to access and read the QR code image through the URL link provided by Qiniu Cloud Storage. We can obtain the image URL by concatenating the domain name of Qiniu Cloud Storage with the file name.

The following is a code example for reading QR code images:

$baseUrl = 'https://' . $bucket . '.yourcdn.com/'; // 替换成你的CDN加速域名
$url = $baseUrl . $key;
echo '<img src="' . $url . '" alt="qrcode">';

Through the above steps, we can use PHP and Qiniu Cloud Storage interface to generate and read image QR codes Methods.

Summary:
This article implements the method of generating and reading QR codes for images by using the PHP language combined with the Qiniu cloud storage interface. Specific steps include generating QR codes, uploading images to Qiniu Cloud Storage, and reading QR code images. By using these methods, we can implement the application of QR codes in actual projects, such as realizing mobile payment, membership cards and other functions. I hope the content of this article can be helpful to the majority of developers.

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