X-Git-Url: https://vcs.fsf.org/?a=blobdiff_plain;f=CRM%2FCore%2FController.php;h=0d642d99f6b13415c06cca2b0826d40f8dc84274;hb=fc46016c4d3b47e8f9e8a35bd78b13954e705bbf;hp=f31e5f963f72dca2c8d27fb3c47e9d4b57ed7b46;hpb=f229b2f508162e364f484cfcef40efd2ccfe1c4c;p=civicrm-core.git

diff --git a/CRM/Core/Controller.php b/CRM/Core/Controller.php
index f31e5f963f..0d642d99f6 100644
--- a/CRM/Core/Controller.php
+++ b/CRM/Core/Controller.php
@@ -484,7 +484,7 @@ class CRM_Core_Controller extends HTML_QuickForm_Controller {
    */
   public function getButtonName() {
     $data = &$this->container();
-    return $data['_qf_button_name'] ?? NULL;
+    return $data['_qf_button_name'] ?? '';
   }
 
   /**