diff --git a/web/documentserver-example/php/functions.php b/web/documentserver-example/php/functions.php
index 38bfd12a..4eaf5951 100644
--- a/web/documentserver-example/php/functions.php
+++ b/web/documentserver-example/php/functions.php
@@ -895,8 +895,9 @@ function getResponseUri($document_response, &$response_uri)
  */
 function tryGetDefaultByType($createExt, $user)
 {
-    $demoName = ($_GET["sample"] ? "sample." : "new.") . $createExt;
-    $demoPath = "assets" . DIRECTORY_SEPARATOR . ($_GET["sample"] ? "sample" : "new") . DIRECTORY_SEPARATOR;
+    $sample = (bool)$_GET["sample"];
+    $demoName = ($sample ? "sample." : "new.") . $createExt;
+    $demoPath = "assets" . DIRECTORY_SEPARATOR . ($sample ? "sample" : "new") . DIRECTORY_SEPARATOR;
     $demoFilename = GetCorrectName($demoName);
 
     if (!@copy(dirname(__FILE__) . DIRECTORY_SEPARATOR . $demoPath . $demoName, getStoragePath($demoFilename))) {
diff --git a/web/documentserver-example/php/views/DocEditorView.php b/web/documentserver-example/php/views/DocEditorView.php
index eeada4f6..074d1ae5 100644
--- a/web/documentserver-example/php/views/DocEditorView.php
+++ b/web/documentserver-example/php/views/DocEditorView.php
@@ -43,13 +43,14 @@ final class DocEditorView extends View
         $confgManager = new ConfigManager();
         $jwtManager = new JwtManager();
         $userList = new ExampleUsers();
+        $fileId = $request["fileID"] ?? "";
         $user = $userList->getUser($request["user"]);
         $isEnableDirectUrl = isset($request["directUrl"]) ? filter_var($request["directUrl"], FILTER_VALIDATE_BOOLEAN)
             : false;
         if (!empty($externalUrl)) {
             $filename = doUpload($externalUrl);
         } else { // if the file url doesn't exist, get file name and file extension
-            $filename = basename($request["fileID"]);
+            $filename = basename($fileId);
         }
         $createExt = $request["fileExt"] ?? "";