PHP Extension 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. PHP Extension

<?php

include("chilkat.php");

$success = false;

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

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

$fmt = new CkFormats();
$jsonOut = new CkJsonObject();
$success = $fmt->QrCode('generate',$json,$jsonOut);
if ($success == false) {
    print $fmt->lastErrorText() . "\n";
    exit;
}

print 'format: ' . $jsonOut->stringOf('outputs[0].format') . "\n";
print 'MIME type: ' . $jsonOut->stringOf('outputs[0].mimeType') . "\n";
print '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 CkBinData();
$success = $bdPng->AppendEncoded($jsonOut->stringOf('outputs[0].base64'),'base64');
if ($success == false) {
    print $bdPng->lastErrorText() . "\n";
    exit;
}

print 'PNG bytes: ' . $bdPng->get_NumBytes() . "\n";

//  The BinData holds the image.  Here it is simply saved.
$success = $bdPng->WriteFile('qa_output/qr_in_memory.png');
if ($success == false) {
    print $bdPng->lastErrorText() . "\n";
    exit;
}

//  The PNG held in bdPng:

//  

//  Sample output:

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

?>