Thinkphp和onethink实现微信支付插件

//实现的Wxpay钩子方法
public function Wxpay($param){
require './Addons/Wxpay/WxPayPubHelper/WxPayPubHelper.php';
$jsApi = new \JsApi_pub();

//=========步骤1：网页授权获取用户openid============
if (!isset($_GET['code']))
{
//触发微信返回code码
$url = $jsApi->createOauthUrlForCode(\WxPayConf_pub::JS_API_CALL_URL.'/order_id/'.$param['order_id']);
Header("Location: $url");
}else
{
$order_id = $param['order_id'];
$info = M('Order')->where('id='.$order_id)->find();
if(empty($info) || $info['is_pay'] == 1){
dump('该订单不存在或已支付'.$order_id);
exit();
}
$this->assign('info', $info);
$a = $info['money'];
$b = 100;
$c = $a * $b;

//获取code码，以获取openid
$code = $_GET['code'];
$jsApi->setCode($code);
$openid = $jsApi->getOpenId();
}

//=========步骤2：使用统一支付接口，获取prepay_id============
//使用统一支付接口
$unifiedOrder = new \UnifiedOrder_pub();

$unifiedOrder->setParameter("openid","$openid");//商品描述
$unifiedOrder->setParameter("body","在线预订");//商品描述
//自定义订单号，此处仅作举例
$timeStamp = time();
//       $out_trade_no = \WxPayConf_pub::APPID."$timeStamp";
$out_trade_no = $info['ordersn'];
$unifiedOrder->setParameter("out_trade_no", "$out_trade_no");//商户订单号
$unifiedOrder->setParameter("total_fee", "$c");//总金额
$unifiedOrder->setParameter("notify_url",\WxPayConf_pub::NOTIFY_URL.'/order_id/'.$param['order_id']);//通知地址
$unifiedOrder->setParameter("trade_type","JSAPI");//交易类型

$prepay_id = $unifiedOrder->getPrepayId();
//=========步骤3：使用jsapi调起支付============
$jsApi->setPrepayId($prepay_id);
$jsApiParameters = $jsApi->getParameters();
$this->assign('jsApiParameters', $jsApiParameters);

$this->display('pay');
}

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