It's worth adding that, in addition to the QR codes library posted by @abaumg, Google provides a QR Codes API QR Codes APImany thanks to @Toukakoukan for the link update.
To use this , basically:
https://chart.googleapis.com/chart?chs=300x300&cht=qr&chl=http%3A%2F%2Fwww.google.com%2F&choe=UTF-8
300x300
is the size of the QR image you want to generate,chl
is the url-encoded string you want to change into a QR code, andchoe
is the (optional) encoding.The link, above, gives more detail, but to use it just have the src
of an image point to the manipulated value, like so:
<img src="https://chart.googleapis.com/chart?chs=300x300&cht=qr&chl=http%3A%2F%2Fwww.google.com%2F&choe=UTF-8" title="Link to Google.com" />
Demo:
qrcode-generator on Github. Simplest script and works like charm.
Pros:
The endroid/QrCode library is easy to use, well maintained, and can be installed using composer. There is also a bundle to use directly with Symfony.
Installing :
$ composer require endroid/qrcode
Usage :
<?php
use Endroid\QrCode\QrCode;
$qrCode = new QrCode();
$qrCode
->setText('Life is too short to be generating QR codes')
->setSize(300)
->setPadding(10)
->setErrorCorrection('high')
->setForegroundColor(array('r' => 0, 'g' => 0, 'b' => 0, 'a' => 0))
->setBackgroundColor(array('r' => 255, 'g' => 255, 'b' => 255, 'a' => 0))
->setLabel('Scan the code')
->setLabelFontSize(16)
->setImageType(QrCode::IMAGE_TYPE_PNG)
;
// now we can directly output the qrcode
header('Content-Type: '.$qrCode->getContentType());
$qrCode->render();
// or create a response object
$response = new Response($qrCode->get(), 200, array('Content-Type' => $qrCode->getContentType()));
The easiest way to generate QR codes with PHP is the phpqrcode library.
The phpqrcode library is really fast to configure and the API documentation is easy to understand.
In addition to abaumg's answer I have attached 2 examples in PHP
from http://phpqrcode.sourceforge.net/examples/index.php
1. QR code encoder
first include the library from your local path
include('../qrlib.php');
then to output the image directly as PNG stream do for example:
QRcode::png('your texte here...');
to save the result locally as a PNG image:
$tempDir = EXAMPLE_TMP_SERVERPATH;
$codeContents = 'your message here...';
$fileName = 'qrcode_name.png';
$pngAbsoluteFilePath = $tempDir.$fileName;
$urlRelativeFilePath = EXAMPLE_TMP_URLRELPATH.$fileName;
QRcode::png($codeContents, $pngAbsoluteFilePath);
2. QR code decoder
See also the zxing decoder:
http://zxing.org/w/decode.jspx
Pretty useful to check the output.
3. List of Data format
A list of data format you can use in your QR code according to the data type :
http://
)I have been using google qrcode api for sometime, but I didn't quite like this because it requires me to be on the Internet to access the generated image.
I did a little comand-line research and found out that linux has a command line tool qrencode
for generating qr-codes.
I wrote this little script. And the good part is that the generated image is less than 1KB in size. Well the supplied data is simply a url.
$url = ($_SERVER['HTTPS'] ? "https://" : "http://").$_SERVER['HTTP_HOST'].'/profile.php?id='.$_GET['pid'];
$img = shell_exec('qrencode --output=- -m=1 '.escapeshellarg($url));
$imgData = "data:image/png;base64,".base64_encode($img);
Then in the html I load the image:
<img class="emrQRCode" src="<?=$imgData ?>" />
You just need to have installed it. [most imaging apps on linux would have installed it under the hood without you realizing.
I know the question is how to generate QR codes using PHP, but for others who are looking for a way to generate codes for websites doing this in pure javascript is a good way to do it. The jquery-qrcode jquery plugin does it well.
Source: Stackoverflow.com