支付宝

@@ -177,7 +177,7 @@ class IndexController extends HomeBaseController
             'out_trade_no' => 20181212201251,
             'total_amount' => 0.01
         ];
-        $return = $alipay->wapPay($builder, '', '');
+        $return = $alipay->wapPay(json_encode($builder), '', '');
         print_r($return);
     }