1、在數據庫中插入sn碼
$data['sn'] = uniqid();
M("coupon")->add($data)
2、生成二維碼
$baseMsg=$res['sn'];
tsload(ADDON_PATH . '/library/ExQrCode.class.php');
//二維碼生成
$qrimg = ExQrCode :: createQr('H', 5,$baseMsg);
$this->assign('qrcodeurl',$qrimg);
3、在頁面中顯示二維碼
<div class="img">
<img src="{$qrcodeurl}" />
</div>