修复元宵抽签活动post请求报错时日期显示错误的bug

Code Review By Rock Zhang

@@ -56,10 +56,10 @@ class YuanxiaoController extends HuodongAction
             $gender = $this->post('gender', 1);
 
             // 格式化日期以便接口接收
-            $birthday = date_format(date_create_from_format('Y年m月d日', $birthday), 'Y-m-d');
+            $FormatBirthday = date_format(date_create_from_format('Y年m月d日', $birthday), 'Y-m-d');
 
             // 调用接口
-            $result = YuanxiaoModel::getChouqianInfo($uid, $nickName, $birthday, $gender);
+            $result = YuanxiaoModel::getChouqianInfo($uid, $nickName, $FormatBirthday, $gender);
             if ($result['code'] === 200) { // 处理成功就跳转到等待页
                 // 将返回的结果存入cookeie中15分钟
                 $cookieData = array(