How to repeat number combinations in php QR code

QR code is a graphic that can be quickly recognized on mobile devices such as mobile phones. In php, we can use third-party libraries to generate QR codes. When generating QR codes, sometimes we need to repeatedly generate multiple QR codes. At this time, we need to pair different information with the QR codes. This article will introduce how to use php to repeatedly generate QR codes and merge them with arrays.

1. Install phpqrcode library

phpqrcode is a library that generates QR codes through PHP. We can install it through composer. Execute the following command in your project directory:

composer require bacon/bacon-qr-code

2. Generate QR code

When using phpqrcode to generate QR code, we need to pass in some parameters, such as QR code content, color, etc. The following is a sample code for generating a QR code:

require_once 'vendor/autoload.php';

use BaconQrCodeRendererImagePng;
use BaconQrCodeWriter;

// 二维码内容
$data = 'https://example.com';

$writer = new Writer(new Png());
$qrCode = $writer->writeString($data);

// 保存二维码图片
file_put_contents('qrcode.png', $qrCode);

The above code uses the Png renderer provided by phpqrcode to generate a QR code and stores it in the qrcode.png file in the root directory of the project. .

3. Generate multiple QR codes

Suppose we need to generate multiple QR codes, and the different information represented by these QR codes is stored in an array. We can use the foreach statement to traverse the array and generate the corresponding QR code. The complete code is as follows:

require_once 'vendor/autoload.php';

use BaconQrCodeRendererImagePng;
use BaconQrCodeWriter;

// 二维码内容数组
$dataArray = array(
    'https://example.com/1',
    'https://example.com/2',
    'https://example.com/3',
);

$writer = new Writer(new Png());

foreach ($dataArray as $key => $data) {
    $qrCode = $writer->writeString($data);
    $filename = 'qrcode_'.$key.'.png';
    file_put_contents($filename, $qrCode);
}

In the above code, we use an array named $dataArray to store different QR code contents. Then use the foreach statement to iterate through the array and generate a QR code for each array element. We can use the $key variable to construct the file name in order to save the image file of each QR code.

4. Merge array with QR code

While generating QR code, we can also merge it with other information in the array. The following is a sample code:

require_once 'vendor/autoload.php';

use BaconQrCodeRendererImagePng;
use BaconQrCodeWriter;

// 二维码内容数组
$dataArray = array(
    array(
        'url' => 'https://example.com/1',
        'title' => 'Example 1',
    ),
    array(
        'url' => 'https://example.com/2',
        'title' => 'Example 2',
    ),
    array(
        'url' => 'https://example.com/3',
        'title' => 'Example 3',
    ),
);

$writer = new Writer(new Png());

foreach ($dataArray as $key => $data) {
    $qrCode = $writer->writeString($data['url']);
    $filename = 'qrcode_'.$key.'.png';
    file_put_contents($filename, $qrCode);

    // 合并数组数据
    $dataArray[$key]['qrcode'] = $filename;
}

// 输出合并后的数组内容
var_dump($dataArray);

In the above code, we create an array named $dataArray, which contains the content of the QR code and other data. Inside the foreach loop, we generated the corresponding QR code and stored the QR code file name in the array. Next, we added an attribute named qrcode to each array element, whose value is the QR code image file name. Finally, we use the var_dump function to print the merged array contents to the screen to see if the merged result is correct.

Summary

By using the phpqrcode library, we can easily generate QR codes. When necessary, we can also generate multiple QR codes through a loop and merge them with an array. This way, we can quickly generate multiple QR codes and associate them with other data.

The above is the detailed content of How to repeat number combinations in php QR code. For more information, please follow other related articles on the PHP Chinese website!