diff --git a/webapp/controller/BigwheelController.class.php b/webapp/controller/BigwheelController.class.php
index a687e40f..bcdbf32d 100644
--- a/webapp/controller/BigwheelController.class.php
+++ b/webapp/controller/BigwheelController.class.php
@@ -151,23 +151,38 @@ class BigwheelController extends BaseAuthedController {
             return;
         }
         $item1 = null;
+                error_log(json_encode(array(
+                    'item2arr' => $item2Arr
+                )));
         {
-            foreach ($item1Arr as $item) {
-                if ($rnd1 <= $item['weight']) {
-                    $item1 = $item;
+            foreach ($item1Arr as $itemTmp1) {
+                if ($rnd1 <= $itemTmp1['weight']) {
+                    $item1 = $itemTmp1;
                     break;
                 }
             }
         }
         $item2 = null;
         {
-            foreach ($item2Arr as $item) {
-                if ($rnd2 <= $item['weight']) {
-                    $item2 = $item;
+                error_log(json_encode(array(
+                    'item2arr' => $item2Arr
+                )));
+            foreach ($item2Arr as $itemTmp2) {
+                error_log(json_encode(array(
+                    'rnd2' => $rnd2,
+                    'item' => $itemTmp2,
+                    //'item2_weight' => $item['weight'],
+                )));
+                if ($rnd2 <= $itemTmp2['weight']) {
+                    $item2 = $itemTmp2;
                     break;
                 }
             }
         }
+        error_log(json_encode(array(
+            'item1' => $item1,
+            'item2' => $item2,
+        )));
         if (empty($item1) || empty($item2)) {
             myself()->_rspErr(1, 'server internal error');
             return;