1、google开放api
$urltoencode='http://www.xiqiao.me';
generateqrfromgoogle($urltoencode);
function generateqrfromgoogle($chl,$widhtheight ='150',$ec_level='l',$margin='0')
{
$url = urlencode($url);
echo '';
}
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).