edit

app/shop/lib/Refund.php

@@ -193,8 +193,8 @@ class Refund
                 if (!$num) {
                     $num = $data['num'];
                 }
-                if (!$data['refund_cash') {
-                    $data['refund_cash' = 0;
+                if (!$data['refund_cash']) {
+                    $data['refund_cash'] = 0;
                 }
                 $cash = $data['price'] - $data['refund_cash'];
                 $num = $data['num'] - $data['refund_num'];