[控制层使用方法] 控制层：使用方法 ~~~ //实例化微信类 public function new_wechat_pay($total_sum, $order_sn) { require_once APPPATH . 'third_party/WxPayPubHelper/WxPayPubHelper.php'; //使用jsapi接口 $jsApi = new JsApi_pub(); $openId = $_SESSION['openid']; //使用统一支付接口 $unifiedOrder = new UnifiedOrder_pub(); $unifiedOrder->setParameter("openid", "$openId");//设置用户openid $unifiedOrder->setParameter("body", "商品描述");//商品描述 //自定义订单号，此处仅作举例 //$timeStamp = time(); //$out_trade_no = WxPayConf_pub::APPID."$timeStamp"; $unifiedOrder->setParameter("out_trade_no", "$order_sn");//商户订单号 $unifiedOrder->setParameter("total_fee", "$total_sum");//总金额 $unifiedOrder->setParameter("notify_url", site_url() . 'order/wechat_pay/callback');//异步通知地址 $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(); return $jsApiParameters; } ~~~