PHP Requires Chilkat v11.7.0+

Generate a QR Code PNG in Memory

See more QR Code Examples

Demonstrates getting a QR code image without writing a file. With no output options the result is a PNG returned as base64 in outputs[0].base64 of the response. The example decodes it into a BinData, which holds the bytes of the PNG to send in an HTTP response, store in a database, attach to an email, or save. Chilkat2 PHP

<?php

use Chilkat2\BinData;
use Chilkat2\Formats;
use Chilkat2\JsonObject;

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

$json = new JsonObject();
$json->UpdateString('payload.text', 'https://www.chilkatsoft.com/');
$json->UpdateInt('render.moduleSize', 6);

$fmt = new Formats();
$jsonOut = new JsonObject();
try {
    $fmt->QrCode('generate', $json, $jsonOut);
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

echo 'format: ', $jsonOut->StringOf('outputs[0].format'), "\n";
echo 'MIME type: ', $jsonOut->StringOf('outputs[0].mimeType'), "\n";
echo 'image: ', $jsonOut->IntOf('outputs[0].width'), ' x ', $jsonOut->IntOf('outputs[0].height'), " pixels\n";

// outputs[0].base64 is the PNG file, base64 encoded.
$bdPng = new BinData();
try {
    $bdPng->AppendEncoded($jsonOut->StringOf('outputs[0].base64'), 'base64');
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

echo 'PNG bytes: ', $bdPng->NumBytes, "\n";

// The BinData holds the image.  Here it is simply saved.
try {
    $bdPng->WriteFile('qa_output/qr_in_memory.png');
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

// The PNG held in bdPng:

// 

// Sample output:

// format: png
// MIME type: image/png
// image: 222 x 222 pixels
// PNG bytes: 877