From 868bb18c984af9b24bf53f9569c9dfe597b97db7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Michal=20=C4=8Ciha=C5=99?= <michal@cihar.com>
Date: Thu, 16 Nov 2017 16:39:28 +0100
Subject: [PATCH] Better deal with unitialized page
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Fixes #13814

Signed-off-by: Michal Čihař <michal@cihar.com>
---
 .../classes/Controllers/Server/ServerEnginesController.php      | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libraries/classes/Controllers/Server/ServerEnginesController.php b/libraries/classes/Controllers/Server/ServerEnginesController.php
index 5362f5c6f9..794060d70b 100644
--- a/libraries/classes/Controllers/Server/ServerEnginesController.php
+++ b/libraries/classes/Controllers/Server/ServerEnginesController.php
@@ -77,7 +77,7 @@ class ServerEnginesController extends Controller
      */
     private function _getHtmlForServerEngine(StorageEngine $engine)
     {
-        $page = $_REQUEST['page'];
+        $page = isset($_REQUEST['page']) ? $_REQUEST['page'] : '';
         $pageOutput = ! empty($page) ? $engine->getPage($page) : '';
 
         /**