phpqrcode-master QR code generation class

Calling PHP qrCode is very simple. The following code can generate a QR code with the content "http://www.php.cn".

Php code

include ' phpqrcode.php';

QRcode::png('"http://www.php.cn');

Then in actual application, we will add in the middle of the QR code Adding your own LOGO has enhanced the publicity effect. So how to generate a QR code containing the logo? In fact, the principle is very simple. First use PHP qr Code to generate a QR code image, and then use PHP's image related functions to prepare the QR code in advance. The logo image is added to the middle of the original QR code image just generated, and then a new QR code image is regenerated.

<?php 
include 'phpqrcode.php'; 
$value = 'http://www.learnphp.cn'; //二维码内容 
$errorCorrectionLevel = 'L';//容错级别 
$matrixPointSize = 6;//生成图片大小 
//生成二维码图片 
QRcode::png($value, 'qrcode.png', $errorCorrectionLevel, $matrixPointSize, 2); 
$logo = 'logo.png';//准备好的logo图片 
$QR = 'qrcode.png';//已经生成的原始二维码图 
  
if ($logo !== FALSE) { 
$QR = imagecreatefromstring(file_get_contents($QR)); 
$logo = imagecreatefromstring(file_get_contents($logo)); 
$QR_width = imagesx($QR);//二维码图片宽度 
$QR_height = imagesy($QR);//二维码图片高度 
$logo_width = imagesx($logo);//logo图片宽度 
$logo_height = imagesy($logo);//logo图片高度 
$logo_qr_width = $QR_width / 5; 
$scale = $logo_width/$logo_qr_width; 
$logo_qr_height = $logo_height/$scale; 
$from_width = ($QR_width - $logo_qr_width) / 2; 
//重新组合图片并调整大小 
imagecopyresampled($QR, $logo, $from_width, $from_width, 0, 0, $logo_qr_width, 
$logo_qr_height, $logo_width, $logo_height); 
} 
//输出图片 
imagepng($QR, 'helloweba.png'); 
echo '<img src="helloweba.png">'; 
?>

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