Dynamically generating a QR code with PHP

Question

I m trying to generate QR codes on my website  All they have to do is have a URL in them  which a variable on my site will provide  What would be the easiest way to do this

User · Answer

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.

User · Answer

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 amp cht qr amp chl http 3A 2F 2Fwww google com 2F amp choe UTF-8    300x300 is the size of the QR image you want to generate  the chl is the url-encoded string you want to change into a QR code  and the choe 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    lt img src  https   chart googleapis com chart chs 300x300 amp cht qr amp chl http 3A 2F 2Fwww google com 2F amp choe UTF-8  title  Link to Google com    gt    Demo

User · Answer

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     lt  php  use Endroid QrCode QrCode    qrCode   new QrCode     qrCode     - gt setText  Life is too short to be generating QR codes       - gt setSize 300      - gt setPadding 10      - gt setErrorCorrection  high       - gt setForegroundColor array  r    gt  0   g    gt  0   b    gt  0   a    gt  0       - gt setBackgroundColor array  r    gt  255   g    gt  255   b    gt  255   a    gt  0       - gt setLabel  Scan the code       - gt setLabelFontSize 16      - gt setImageType QrCode  IMAGE TYPE PNG        now we can directly output the qrcode header  Content-Type     qrCode- gt getContentType      qrCode- gt render        or create a response object  response   new Response  qrCode- gt get    200  array  Content-Type    gt   qrCode- gt getContentType

User · Answer

qrcode-generator on Github  Simplest script and works like charm   Pros    No third party dependency  No limitations for the number of QR code generations

User · Answer

The easiest way to generate QR codes with PHP is the phpqrcode library

User · Answer

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

User · Answer

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     Website URL  http   stackoverflow com  including the protocole http     email address  mailto name example com Telephone Number   16365553344  including country code  SMS Message  smsto number message MMS Message  mms number subject YouTube Video  youtube   ID  may work on iPhone  not standardized

[php] Dynamically generating a QR code with PHP

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