How to use PHP to generate batch QR codes?

How to use PHP to generate batch QR codes?

With the continuous development of Internet technology, QR codes have become a very common information transmission tool. QR codes can store a large amount of information and can be quickly scanned and recognized, so they have been widely used in various industries. In many cases, we need to generate a large number of QR codes in batches, such as for product labels, event tickets, etc.

PHP is a scripting language widely used in web development and is flexible, simple and easy to use. Below, we will introduce how to use PHP to generate batches of QR codes and provide sample code to help readers understand and practice.

First of all, we need an extension library for generating QR codes. Here we choose a very popular open source library - PHP QR Code (http://phpqrcode.sourceforge.net/). We need to download and install this library and then include it in the PHP code.

Download address: http://sourceforge.net/projects/phpqrcode/files/

Next, we need to write code to generate batches of QR codes. In this example, we assume that we want to generate 100 QR codes, store them in different files, and name them with "qrcode_1.png", "qrcode_2.png" ... "qrcode_100.png".

<?php

require('phpqrcode/qrlib.php');

$quantity = 100; // 要生成的二维码数量
$path = './qrcodes/'; // 保存二维码的目录

// 创建二维码保存目录
if(!is_dir($path)){
    mkdir($path, 0777, true);
}

for($i = 1; $i <= $quantity; $i++){
    $data = "https://example.com/qrcode/{$i}"; // 二维码存储的内容

    $filename = $path . "qrcode_{$i}.png"; // 二维码保存的文件名

    // 生成二维码
    QRcode::png($data, $filename, QR_ECLEVEL_L, 8, 2);
    echo "二维码 {$i} 生成成功！<br>";
}

echo "批量生成二维码完成！";

?>

Code analysis:

1. First, we introduced the main file qrlib.php of the PHP QR Code library through the require function.
2. $quantity defines the number of QR codes to be generated.
3. $path defines the directory where the QR code is saved. Here we use a relative path, which is a directory named qrcodes saved in the current script directory.
4. Use the mkdir function to create the directory where the QR code is saved, if the directory does not exist.
5. Use for loop to generate 100 QR codes.
6. $data saves the content of the QR code. Here we use an example URL, in which $i is used to represent the number of the QR code.
7. $filename saves the saving path and file name of the QR code.
8. Call the QRcode::png function to generate a QR code. QR_ECLEVEL_L represents the error correction level. The larger the number, the stronger the error correction capability, 8 and 2 respectively. Indicates the side length and border size of the QR code.
9. Finally, output the result generated by the QR code through the echo statement.

By running the above code, we can generate 100 QR code files in the specified directory, and see a successful generation prompt in the browser.

Summary:

This article introduces how to use PHP to generate batches of QR codes and provides code examples. Readers can modify and expand it according to their own needs. For example, they can generate QR codes in batches based on the data in the database, or add custom styles, etc. I hope this article will be helpful for everyone to understand and use PHP to generate batch QR codes!

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