diff --git a/var/Widget/Contents/Post/Edit.php b/var/Widget/Contents/Post/Edit.php
index 522638c4..ae50cbed 100644
--- a/var/Widget/Contents/Post/Edit.php
+++ b/var/Widget/Contents/Post/Edit.php
@@ -75,7 +75,7 @@ class Edit extends Contents implements ActionInterface
 
             /** 发送ping */
             $trackback = array_filter(
-                array_unique(preg_split("/(\r|\n|\r\n)/", trim($this->request->get('trackback'))))
+                array_unique(preg_split("/(\r|\n|\r\n)/", trim($this->request->get('trackback', ''))))
             );
             Service::alloc()->sendPing($this, $trackback);