去重

app-ghs/controllers/ProductController.php

@@ -47,6 +47,7 @@ class ProductController extends BaseController
         foreach ($arr as $date) {
             $new[] = strtotime($date);
         }
+        $new = array_unique(array_filter($new));
         asort($new);
         $newStr = implode(',', $new);
         $info->presell = $presell;