微信支付问题，支付成功后跳转到指定页面

微信支付分为四步：
1、获取code
2、获取openid
3、获取相应数据得到商品订单数组
4、支付返回（js 判断）
PHP语言: 

include("includes/modules/payment/WxPayPubHelper.php");
   //使用jsapi接口
   $jsApi = new JsApi_pub();
   //=========步骤1：网页授权获取用户openid============
   //通过code获得openid
   if (!isset($_GET['code']))
   {
       //触发微信返回code码
       $url = $jsApi->createOauthUrlForCode(WxPayConf_pub::JS_API_CALL_URL);
       ecs_header("Location: $url");
   }else
   {
       //获取code码，以获取openid 
       $code = $_GET['code'];
       $jsApi->setCode($code);
       $openid = $jsApi->getOpenId();
       if(!empty($openid)){
           include_once('includes/lib_clips.php');
           include_once('includes/lib_payment.php');
          获取订单信息
  }
         $unifiedOrder = new UnifiedOrder_pub();
       
       //设置统一支付接口参数
       //设置必填参数
       //appid已填,商户无需重复填写
       //mch_id已填,商户无需重复填写
       //noncestr已填,商户无需重复填写
       //spbill_create_ip已填,商户无需重复填写
       //sign已填,商户无需重复填写
       $unifiedOrder->setParameter("openid","$openid");//商品描述
       $out_trade_no = $order['order_sn'];
       $unifiedOrder->setParameter("body","$goods_name");//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";
       $total_fee    =    $total['amount']*100;
       $unifiedOrder->setParameter("out_trade_no","$out_trade_no");//商户订单号
       $unifiedOrder->setParameter("total_fee","$total_fee");//总金额
       $unifiedOrder->setParameter("notify_url",WxPayConf_pub::NOTIFY_URL);//通知地址
       $unifiedOrder->setParameter("trade_type","JSAPI");//交易类型
       //非必填参数，商户可根据实际情况选填
       //$unifiedOrder->setParameter("sub_mch_id","XXXX");//子商户号  
       //$unifiedOrder->setParameter("device_info","XXXX");//设备号
       //$unifiedOrder->setParameter("attach","XXXX");//附加数据
       //$unifiedOrder->setParameter("time_start","XXXX");//交易起始时间
       //$unifiedOrder->setParameter("time_expire","XXXX");//交易结束时间
       //$unifiedOrder->setParameter("goods_tag","XXXX");//商品标记
       //$unifiedOrder->setParameter("openid","XXXX");//用户标识
       //$unifiedOrder->setParameter("product_id","XXXX");//商品ID

       $prepay_id = $unifiedOrder->getPrepayId();
       //=========步骤3：使用jsapi调起支付============
       $jsApi->setPrepayId($prepay_id);

       $jsApiParameters = $jsApi->getParameters();
       //$jsApiParameters = json_encode($jsApiParameters);
       $smarty->assign('pay_online', $jsApiParameters);

JavaScript语言: 

<script type="text/javascript">

       //调用微信JS api 支付
       function jsApiCall()
       {
           WeixinJSBridge.invoke(
               'getBrandWCPayRequest',
               {$pay_online},
               function(res){
                   WeixinJSBridge.log(res.err_msg);
                   if(res.err_msg == "get_brand_wcpay_request:ok"){
                   //alert(res.err_code+res.err_desc+res.err_msg);
                       window.location.href="http://blog.csdn.net/wang_quan_li";
                   }else{
                       //返回跳转到订单详情页面
                       alert('支付失败');
                       window.location.href="http://blog.csdn.net/wang_quan_li";
                         
                   }
               }
           );
       }

       function callpay()
       {
           if (typeof WeixinJSBridge == "undefined"){
               if( document.addEventListener ){
                   document.addEventListener('WeixinJSBridgeReady', jsApiCall, false);
               }else if (document.attachEvent){
                   document.attachEvent('WeixinJSBridgeReady', jsApiCall);
                   document.attachEvent('onWeixinJSBridgeReady', jsApiCall);
               }
           }else{