代码错误优化

app/model/User.php

@@ -288,7 +288,7 @@ class User extends Model
         $User = self::find($user_id);
         if ($User->withdrawal_balance <= 0) return ['status' => 0,'msg' => '可提余额不足，无法转移'];
 
-        $User->balance = bcadd($User->balance + $User->withdrawal_balance,2);
+        $User->balance = bcadd($User->balance,$User->withdrawal_balance,2);
         $User->withdrawal_balance = 0;
 
         $User->save();