How to Generate QR Code in PHP

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Quick Response (QR) codes are a popular type of two-dimensional barcode that can be scanned using a smartphone or QR code scanner to quickly access information or websites. In this article, we’ll walk through how to generate QR codes in PHP using the PHP QR Code library.

Step 1: Download and Install PHP QR Code Library

To get started, you’ll need to download the PHP QR Code library from the official website. Once you’ve downloaded the library, extract the files and copy the “qr” folder to your project directory.

Step 2: Create a PHP File

Next, create a new PHP file in your project directory and name it “generate_qr.php”. This file will contain the code to generate the QR code.

Step 3: Include QR Code Library

In your PHP file, include the QR code library by adding the following code at the beginning of the file:

include "qr/qrlib.php";

This code will include the QR code library and make its functions available in your file.

Step 4: Generate QR Code

To generate a QR code, you’ll need to call the “QRcode::png” function from the library. This function takes three parameters: the data to be encoded, the file name to save the image as (optional), and the error correction level (optional).

Here’s an example of how to generate a QR code for a URL:

$url = "https://example.com";
$filename = "example.png";
$errorCorrectionLevel = "H";
$matrixPointSize = 4;

QRcode::png($url, $filename, $errorCorrectionLevel, $matrixPointSize);

In this example, we’re generating a QR code for the URL “https://example.com“. We’re also specifying a file name for the image (“example.png”), an error correction level of “H” (which stands for high), and a matrix point size of 4 (which determines the size of the QR code).

Step 5: Display QR Code

To display the QR code on a webpage, you can simply include the image file in an HTML <img> tag. Here’s an example:

<img src="example.png" alt="Example QR Code">

This code will display the QR code on the webpage and provide an alternative text description for users who can’t see the image.

Conclusion

In this article, we’ve walked through the steps to generate a QR code in PHP using the PHP QR Code library. By following these steps, you should be able to easily generate QR codes for your own projects and websites.

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