确定能用的微信支付jsapi

`微信支付分为四步：
1、获取code
2、获取opendi
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:
<</span>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.sina.com.cn/u/1863605217";
}else{
//返回跳转到订单详情页面
alert(支付失败);
window.location.href="http://blog.sina.com.cn/u/1863605217";

}
}
);
}

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{
jsApiCall();
}
}

<</span>/script>`