1.google开放api
复制代码 代码如下:
$urlToEncode="http://bbs.lewanchina.com";
generateQRfromGoogle($urlToEncode);
function generateQRfromGoogle($chl,$widhtHeight ='150',$EC_level='L',$margin='0')
{
$url = urlencode($url);
echo '<img src="http://chart.apis.google.com/chart?chs='.$widhtHeight.'x'.$widhtHeight.'&cht=qr&chld='.$EC_level.'|'.$margin.'&chl='.$chl.'" alt="QR code" widhtHeight="'.$size.'" widhtHeight="'.$size.'"/>';
}


2.php类库PHP QR Code

PHP QR Code is open source (LGPL) library for generating QR Code,
2-dimensional barcode. Based on libqrencode C library,
provides API for creating QR Code barcode images (PNG, JPEG thanks to GD2).
Implemented purely in PHP, with no external dependencies (except GD2 if needed).
地址：http://phpqrcode.sourceforge.net/
下载：http://sourceforge.net/projects/phpqrcode/
实例：
复制代码 代码如下:
<?
include "./phpqrcode/phpqrcode.php";
$value="http:///qr/qr_cgi.html

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http://tools.jb51.net/transcoding/jb51qrcode