使用PHP QR Code类库创建中间带LOGO的二维码

<? 
include "phpqrcode/phpqrcode.php"; 
$value="http://s.bookphone.cn/chinabook/index.php/adminhtml/Croles/admin"; 
$errorCorrectionLevel = "L"; 
$matrixPointSize = "4"; 
QRcode::png($value, false, $errorCorrectionLevel, $matrixPointSize); 
exit; 
?>

<?php 
include('phpqrcode/phpqrcode.php'); 
$value='http://xy.bookphone.cn'; 
$errorCorrectionLevel = 'L'; 
$matrixPointSize = 6; 
QRcode::png($value, 'xiangyang.png', $errorCorrectionLevel, $matrixPointSize, 2); 
echo "QR code generated"."<br />"; 
$logo = 'logo.png'; 
$QR = 'xiangyang.png'; 
if($logo !== FALSE) 
{ 
$QR = imagecreatefromstring(file_get_contents($QR)); 
$logo = imagecreatefromstring(file_get_contents($logo)); 
$QR_width = imagesx($QR); 
$QR_height = imagesy($QR); 
$logo_width = imagesx($logo); 
$logo_height = imagesy($logo); 
$logo_qr_width = $QR_width / 5; 
$scale = $logo_width / $logo_qr_width; 
$logo_qr_height = $logo_height / $scale; 
$from_width = ($QR_width - $logo_qr_width) / 2; 
imagecopyresampled($QR, $logo, $from_width, $from_width, 0, 0, $logo_qr_width, $logo_qr_height, $logo_width, $logo_height); 
} 
imagepng($QR,'xiangyanglog.png'); 
?>