Creating a QR Code with a centered Logo in PHP with PHP QR Code Generator
Ok, I've found a solution. Where a image file is created temporaray to insert the the logo or whatever you want. I't just a very small change form the code found here http://ourcodeworld.com/articles/read/225/how-to-generate-qr-code-with-logo-easily-in-php-automatically I'm using readfile() at the end to push everything directly to the output buffer.
<?php
// user input
$param = $_GET['projectid'];
$divider = ",";
// Path where the images will be saved
$filepath = 'content/images/qr/qr-temp-image.png';
// Image (logo) to be drawn
$logopath = 'content/images/qr/qr-freespace.png';
// we need to be sure ours script does not output anything!!!
// otherwise it will break up PNG binary!
ob_start("callback");
// text for the qr code
$codeText = 'Projectname'.$divider.$param;
// end of processing here
$debugLog = ob_get_contents();
ob_end_clean();
// create a QR code and save it in the filepath
QRcode::png($codeText, $filepath, QR_ECLEVEL_H, 9, 2, true );
// Start DRAWING LOGO IN QRCODE
$QR = imagecreatefrompng($filepath);
// START TO DRAW THE IMAGE ON THE QR CODE
$logo = imagecreatefromstring(file_get_contents($logopath));
$QR_width = imagesx($QR);
$QR_height = imagesy($QR);
$logo_width = imagesx($logo);
$logo_height = imagesy($logo);
// Scale logo to fit in the QR Code
$logo_qr_width = $QR_width/3;
$scale = $logo_width/$logo_qr_width;
$logo_qr_height = $logo_height/$scale;
imagecopyresampled($QR, $logo, $QR_width/3, $QR_height/3, 0, 0, $logo_qr_width, $logo_qr_height, $logo_width, $logo_height);
// Save QR code again, but with logo on it
imagepng($QR,$filepath);
// outputs image directly into browser, as PNG stream
readfile($filepath);
?>
Patrick Münster
I'm Patrick Münster a graduated software engineer (Dipl. Ing.) working at the Stuttgart Media University as research associate for accessibility and gamification. I'm teaching human computer interaction, user interface and game design. Futhermore I'm a freelancer working as webdeveloper, consulting engineer focused on UI and UX Design and digital artist in several big and small projects. I am always open for new experiences and looking forward for interesting jobs and challenges.
Updated on June 30, 2022Comments
-
Patrick Münster almost 2 years
I'm creating QR codes with PHP QR Code (http://phpqrcode.sourceforge.net/). It works well but now I need a free space for a custom graphic or logo in the center of it. And I want to do this without saving the image on the server. Has anyone a suggestion? What I've got so far is this:
<?php $param = $_GET['projectid']; $divider = ","; $codeText = 'Projectname'.$divider.$param; // outputs image directly into browser, as PNG stream //QRcode::png($text, $outfile = false, $level = QR_ECLEVEL_L, $size = 3, $margin = 4, $saveandprint=false) QRcode::png($codeText, false, QR_ECLEVEL_H, 9, 2, true ); ?>
-
Saikat Bepari over 6 yearsthe logo is not aligning at center of qr code. logo width=234px and height = 107px
-
Patrick Münster over 6 yearsHi would you like to show me your code and used images? Maybe I can see what causes the problem.
-
Patrick Münster over 6 yearsHave you tried different QR code sizes? I'm not sure, but maybe your logo with a width of 234 px is too big vor the QR code with size 9? Try a higher number here QRcode::png($codeText, $filepath, QR_ECLEVEL_H, 12, 2, true ).