diff --git a/niucloud/app/common.php b/niucloud/app/common.php
index 6ae05b1b08019e5412585334329b2026b10496c2..5c9f5074460d1ef1c65f31c05cef3833548bef67 100644
--- a/niucloud/app/common.php
+++ b/niucloud/app/common.php
@@ -451,6 +451,8 @@ function check_event_result($result)
  */
 function array_merge2(array $array1, array $array2)
 {
+    if (empty($array2))
+        return $array1;
     foreach ($array2 as $array2_k => $array2_v) {
         if (array_key_exists($array2_k, $array1)) {
             foreach ($array2_v as $array2_kk => $array2_vv) {