Basic process and detailed steps to implement scanning in PHP

With the popularity of QR codes, more and more applications need to implement code scanning functions. PHP is a commonly used programming language on the back end. How to implement PHP scanning? This article will introduce the basic process and detailed steps of scanning in PHP.

1. Basic process

The basic process of PHP scanning is as follows:

1. Generate QR code

2. Scan the QR code

3. Obtain the QR code content

4. Process the QR code content

2. Detailed steps

1. Generate the QR code

There are many ways to generate QR codes in PHP. This article uses the third-party library phpqrcode as an example. Install the phpqrcode library in the PHP environment and introduce the library file into the code. You can use the following code to generate a QR code:

include 'phpqrcode.php';//引入phpqrcode库
$url = 'http://www.example.com';//生成二维码的内容
$qrCode = new QRcode();
$qrCode->png($url);//生成二维码并输出

The generated QR code can be saved on the server or generated and output in real time. .

2. Scan the QR code

On your mobile device, you can use the scanner that comes with the system to scan the QR code, or you can download and install other scanner applications. On the PC side, you can also use the camera with a scanner application to scan the QR code.

3. Get the QR code content

After scanning the QR code, the device will automatically store the QR code content in the clipboard. You can paste it directly on the PC and browse it on the mobile device. Open a new tab with the browser, automatically paste and jump to the web page corresponding to the QR code content. If you need to pass the QR code content to the background program for processing, you need to pass the content to the background program.

4. Process the QR code content

After obtaining the QR code content, the content needs to be processed according to actual needs. For example, you can store the content in a database, jump to different pages based on the content, or perform other operations based on the content.

PHP implementation of scanning needs to be used with front-end code. For example, in the front-end page, you can use JS to obtain the camera lens image and use canvas to generate a QR code image, and then pass the QR code image to the background for processing. For specific implementation, please refer to relevant documents and examples.

Summary:

This article introduces the basic process and detailed steps of scanning in PHP. I hope it will be helpful to readers. Note that PHP implementation of scanning needs to be processed separately on the front end and backend, and the corresponding environment and library files need to be configured.

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